Merge remote-tracking branch 'upstream/master' into security_context2

67 files changed, 2519 insertions, 441 deletions

diff --git a/BUILD b/BUILD
index 884b168660..13a8784ed1 100644
--- a/BUILD
+++ b/BUILD
@@ -138,6 +138,7 @@ cc_library(
     "src/core/security/base64.h",
     "src/core/security/credentials.h",
     "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
     "src/core/security/secure_endpoint.h",
     "src/core/security/secure_transport_setup.h",
     "src/core/security/security_connector.h",
@@ -254,6 +255,7 @@ cc_library(
     "src/core/security/credentials_win32.c",
     "src/core/security/google_default_credentials.c",
     "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
     "src/core/security/secure_endpoint.c",
     "src/core/security/secure_transport_setup.c",
     "src/core/security/security_connector.c",
@@ -954,6 +956,7 @@ objc_library(
     "src/core/security/credentials_win32.c",
     "src/core/security/google_default_credentials.c",
     "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
     "src/core/security/secure_endpoint.c",
     "src/core/security/secure_transport_setup.c",
     "src/core/security/security_connector.c",
@@ -1091,6 +1094,7 @@ objc_library(
     "src/core/security/base64.h",
     "src/core/security/credentials.h",
     "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
     "src/core/security/secure_endpoint.h",
     "src/core/security/secure_transport_setup.h",
     "src/core/security/security_connector.h",
diff --git a/Makefile b/Makefile
index ef5af4ac16..6ade6b42e3 100644
--- a/Makefile
+++ b/Makefile
@@ -215,6 +215,7 @@ endif
 endif
 INSTALL = install
 RM = rm -f
+PKG_CONFIG = pkg-config
 
 ifndef VALID_CONFIG_$(CONFIG)
 $(error Invalid CONFIG value '$(CONFIG)')
@@ -331,9 +332,9 @@ HOST_LDLIBS = $(LDLIBS)
 # These are automatically computed variables.
 # There shouldn't be any need to change anything from now on.
 
-HAS_PKG_CONFIG = $(shell command -v pkg-config >/dev/null 2>&1 && echo true || echo false)
+HAS_PKG_CONFIG = $(shell command -v $(PKG_CONFIG) >/dev/null 2>&1 && echo true || echo false)
 
-PC_TEMPLATE = prefix=$(prefix)\nexec_prefix=\$${prefix}\nincludedir=\$${prefix}/include\nlibdir=\$${exec_prefix}/lib\n\nName: $(PC_NAME)\nDescription: $(PC_DESCRIPTION)\nVersion: $(VERSION)\nCflags: -I\$${includedir} $(PC_CFLAGS)\nRequires.private: $(PC_REQUIRES_PRIVATE)\nLibs: -L\$${libdir}\nLibs.private: $(PC_LIBS_PRIVATE)
+PC_TEMPLATE = prefix=$(prefix)\nexec_prefix=\$${prefix}\nincludedir=\$${prefix}/include\nlibdir=\$${exec_prefix}/lib\n\nName: $(PC_NAME)\nDescription: $(PC_DESCRIPTION)\nVersion: $(VERSION)\nCflags: -I\$${includedir} $(PC_CFLAGS)\nRequires.private: $(PC_REQUIRES_PRIVATE)\nLibs: -L\$${libdir} $(PC_LIB)\nLibs.private: $(PC_LIBS_PRIVATE)
 
 # gpr .pc file
 PC_NAME = gRPC Portable Runtime
@@ -341,7 +342,8 @@ PC_DESCRIPTION = gRPC Portable Runtime
 PC_CFLAGS = -pthread
 PC_REQUIRES_PRIVATE =
 PC_LIBS_PRIVATE = -lpthread
-ifeq ($(SYSTEM),Darwin)
+PC_LIB = -lgpr
+ifneq ($(SYSTEM),Darwin)
 PC_LIBS_PRIVATE += -lrt
 endif
 GPR_PC_FILE := $(PC_TEMPLATE)
@@ -371,11 +373,10 @@ OPENSSL_REQUIRES_DL = true
 endif
 
 ifeq ($(HAS_PKG_CONFIG),true)
-OPENSSL_ALPN_CHECK_CMD = pkg-config --atleast-version=1.0.2 openssl
-OPENSSL_NPN_CHECK_CMD = pkg-config --alteast-version=1.0.1 openssl
-ZLIB_CHECK_CMD = pkg-config --exists zlib
-PERFTOOLS_CHECK_CMD = pkg-config --exists profiler
-PROTOBUF_CHECK_CMD = pkg-config --atleast-version=3.0.0-alpha-3 protobuf
+OPENSSL_ALPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.2 openssl
+OPENSSL_NPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.1 openssl
+ZLIB_CHECK_CMD = $(PKG_CONFIG) --exists zlib
+PROTOBUF_CHECK_CMD = $(PKG_CONFIG) --atleast-version=3.0.0-alpha-3 protobuf
 else # HAS_PKG_CONFIG
 
 ifeq ($(SYSTEM),MINGW32)
@@ -387,7 +388,6 @@ endif
 OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
 OPENSSL_NPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
 ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
-PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
 
 ifeq ($(OPENSSL_REQUIRES_DL),true)
@@ -397,6 +397,8 @@ endif
 
 endif # HAS_PKG_CONFIG
 
+PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
+
 PROTOC_CHECK_CMD = which protoc > /dev/null
 PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
 DTRACE_CHECK_CMD = which dtrace > /dev/null
@@ -484,8 +486,8 @@ DEP_MISSING += zlib
 endif
 else
 ifeq ($(HAS_PKG_CONFIG),true)
-CPPFLAGS += $(shell pkg-config --cflags zlib)
-LDFLAGS += $(shell pkg-config --libs-only-L zlib)
+CPPFLAGS += $(shell $(PKG_CONFIG) --cflags zlib)
+LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L zlib)
 PC_REQUIRES_GRPC += zlib
 else
 PC_LIBS_GRPC += -lz
@@ -501,11 +503,11 @@ ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),true)
 ifeq ($(HAS_PKG_CONFIG),true)
 OPENSSL_PKG_CONFIG = true
 PC_REQUIRES_SECURE = openssl
-CPPFLAGS := $(shell pkg-config --cflags openssl) $(CPPFLAGS)
-LDFLAGS_OPENSSL_PKG_CONFIG = $(shell pkg-config --libs-only-L openssl)
+CPPFLAGS := $(shell $(PKG_CONFIG) --cflags openssl) $(CPPFLAGS)
+LDFLAGS_OPENSSL_PKG_CONFIG = $(shell $(PKG_CONFIG) --libs-only-L openssl)
 ifeq ($(SYSTEM),Linux)
 ifneq ($(LDFLAGS_OPENSSL_PKG_CONFIG),)
-LDFLAGS_OPENSSL_PKG_CONFIG += $(shell pkg-config --libs-only-L openssl | sed s/L/Wl,-rpath,/)
+LDFLAGS_OPENSSL_PKG_CONFIG += $(shell $(PKG_CONFIG) --libs-only-L openssl | sed s/L/Wl,-rpath,/)
 endif
 endif
 LDFLAGS := $(LDFLAGS_OPENSSL_PKG_CONFIG) $(LDFLAGS)
@@ -542,7 +544,7 @@ endif
 endif
 
 ifeq ($(OPENSSL_PKG_CONFIG),true)
-LDLIBS_SECURE += $(shell pkg-config --libs-only-l openssl)
+LDLIBS_SECURE += $(shell $(PKG_CONFIG) --libs-only-l openssl)
 else
 LDLIBS_SECURE += $(addprefix -l, $(LIBS_SECURE))
 endif
@@ -553,6 +555,7 @@ PC_DESCRIPTION = high performance general RPC framework
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = $(PC_REQUIRES_GRPC) $(PC_REQUIRES_SECURE)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPC) $(PC_LIBS_SECURE)
+PC_LIB = -lgrpc
 GRPC_PC_FILE := $(PC_TEMPLATE)
 
 # gprc_unsecure .pc file
@@ -561,6 +564,7 @@ PC_DESCRIPTION = high performance general RPC framework without SSL
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = $(PC_REQUIRES_GRPC)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPC)
+PC_LIB = -lgrpc
 GRPC_UNSECURE_PC_FILE := $(PC_TEMPLATE)
 
 PROTOBUF_PKG_CONFIG = false
@@ -572,11 +576,11 @@ ifeq ($(HAS_SYSTEM_PROTOBUF),true)
 ifeq ($(HAS_PKG_CONFIG),true)
 PROTOBUF_PKG_CONFIG = true
 PC_REQUIRES_GRPCXX = protobuf
-CPPFLAGS := $(shell pkg-config --cflags protobuf) $(CPPFLAGS)
-LDFLAGS_PROTOBUF_PKG_CONFIG = $(shell pkg-config --libs-only-L protobuf)
+CPPFLAGS := $(shell $(PKG_CONFIG) --cflags protobuf) $(CPPFLAGS)
+LDFLAGS_PROTOBUF_PKG_CONFIG = $(shell $(PKG_CONFIG) --libs-only-L protobuf)
 ifeq ($(SYSTEM),Linux)
 ifneq ($(LDFLAGS_PROTOBUF_PKG_CONFIG),)
-LDFLAGS_PROTOBUF_PKG_CONFIG += $(shell pkg-config --libs-only-L protobuf | sed s/L/Wl,-rpath,/)
+LDFLAGS_PROTOBUF_PKG_CONFIG += $(shell $(PKG_CONFIG) --libs-only-L protobuf | sed s/L/Wl,-rpath,/)
 endif
 endif
 else
@@ -599,7 +603,7 @@ LIBS_PROTOC = protoc protobuf
 HOST_LDLIBS_PROTOC += $(addprefix -l, $(LIBS_PROTOC))
 
 ifeq ($(PROTOBUF_PKG_CONFIG),true)
-LDLIBS_PROTOBUF += $(shell pkg-config --libs-only-l protobuf)
+LDLIBS_PROTOBUF += $(shell $(PKG_CONFIG) --libs-only-l protobuf)
 else
 LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
 endif
@@ -610,6 +614,7 @@ PC_DESCRIPTION = C++ wrapper for gRPC
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = grpc $(PC_REQUIRES_GRPCXX)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPCXX)
+PC_LIB = -lgrpc++
 GRPCXX_PC_FILE := $(PC_TEMPLATE)
 
 # grpc++_unsecure .pc file
@@ -618,6 +623,7 @@ PC_DESCRIPTION = C++ wrapper for gRPC without SSL
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = grpc_unsecure $(PC_REQUIRES_GRPCXX)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPCXX)
+PC_LIB = -lgrpc++
 GRPCXX_UNSECURE_PC_FILE := $(PC_TEMPLATE)
 
 ifeq ($(MAKECMDGOALS),clean)
@@ -770,9 +776,11 @@ grpc_create_jwt: $(BINDIR)/$(CONFIG)/grpc_create_jwt
 grpc_credentials_test: $(BINDIR)/$(CONFIG)/grpc_credentials_test
 grpc_fetch_oauth2: $(BINDIR)/$(CONFIG)/grpc_fetch_oauth2
 grpc_json_token_test: $(BINDIR)/$(CONFIG)/grpc_json_token_test
+grpc_jwt_verifier_test: $(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test
 grpc_print_google_default_creds_token: $(BINDIR)/$(CONFIG)/grpc_print_google_default_creds_token
 grpc_security_connector_test: $(BINDIR)/$(CONFIG)/grpc_security_connector_test
 grpc_stream_op_test: $(BINDIR)/$(CONFIG)/grpc_stream_op_test
+grpc_verify_jwt: $(BINDIR)/$(CONFIG)/grpc_verify_jwt
 hpack_parser_test: $(BINDIR)/$(CONFIG)/hpack_parser_test
 hpack_table_test: $(BINDIR)/$(CONFIG)/hpack_table_test
 httpcli_format_request_test: $(BINDIR)/$(CONFIG)/httpcli_format_request_test
@@ -1415,7 +1423,7 @@ privatelibs_cxx:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LIBDIR)/$(CONFIG
 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: privatelibs_c $(BINDIR)/$(CONFIG)/alarm_heap_test $(BINDIR)/$(CONFIG)/alarm_list_test $(BINDIR)/$(CONFIG)/alarm_test $(BINDIR)/$(CONFIG)/alpn_test $(BINDIR)/$(CONFIG)/bin_encoder_test $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test $(BINDIR)/$(CONFIG)/chttp2_stream_encoder_test $(BINDIR)/$(CONFIG)/chttp2_stream_map_test $(BINDIR)/$(CONFIG)/dualstack_socket_test $(BINDIR)/$(CONFIG)/fd_conservation_posix_test $(BINDIR)/$(CONFIG)/fd_posix_test $(BINDIR)/$(CONFIG)/fling_client $(BINDIR)/$(CONFIG)/fling_server $(BINDIR)/$(CONFIG)/fling_stream_test $(BINDIR)/$(CONFIG)/fling_test $(BINDIR)/$(CONFIG)/gpr_cancellable_test $(BINDIR)/$(CONFIG)/gpr_cmdline_test $(BINDIR)/$(CONFIG)/gpr_env_test $(BINDIR)/$(CONFIG)/gpr_file_test $(BINDIR)/$(CONFIG)/gpr_histogram_test $(BINDIR)/$(CONFIG)/gpr_host_port_test $(BINDIR)/$(CONFIG)/gpr_log_test $(BINDIR)/$(CONFIG)/gpr_slice_buffer_test $(BINDIR)/$(CONFIG)/gpr_slice_test $(BINDIR)/$(CONFIG)/gpr_string_test $(BINDIR)/$(CONFIG)/gpr_sync_test $(BINDIR)/$(CONFIG)/gpr_thd_test $(BINDIR)/$(CONFIG)/gpr_time_test $(BINDIR)/$(CONFIG)/gpr_tls_test $(BINDIR)/$(CONFIG)/gpr_useful_test $(BINDIR)/$(CONFIG)/grpc_auth_context_test $(BINDIR)/$(CONFIG)/grpc_base64_test $(BINDIR)/$(CONFIG)/grpc_byte_buffer_reader_test $(BINDIR)/$(CONFIG)/grpc_channel_stack_test $(BINDIR)/$(CONFIG)/grpc_completion_queue_test $(BINDIR)/$(CONFIG)/grpc_credentials_test $(BINDIR)/$(CONFIG)/grpc_json_token_test $(BINDIR)/$(CONFIG)/grpc_security_connector_test $(BINDIR)/$(CONFIG)/grpc_stream_op_test $(BINDIR)/$(CONFIG)/hpack_parser_test $(BINDIR)/$(CONFIG)/hpack_table_test $(BINDIR)/$(CONFIG)/httpcli_format_request_test $(BINDIR)/$(CONFIG)/httpcli_parser_test $(BINDIR)/$(CONFIG)/httpcli_test $(BINDIR)/$(CONFIG)/json_rewrite $(BINDIR)/$(CONFIG)/json_rewrite_test $(BINDIR)/$(CONFIG)/json_test $(BINDIR)/$(CONFIG)/lame_client_test $(BINDIR)/$(CONFIG)/message_compress_test $(BINDIR)/$(CONFIG)/multi_init_test $(BINDIR)/$(CONFIG)/multiple_server_queues_test $(BINDIR)/$(CONFIG)/murmur_hash_test $(BINDIR)/$(CONFIG)/no_server_test $(BINDIR)/$(CONFIG)/poll_kick_posix_test $(BINDIR)/$(CONFIG)/resolve_address_test $(BINDIR)/$(CONFIG)/secure_endpoint_test $(BINDIR)/$(CONFIG)/sockaddr_utils_test $(BINDIR)/$(CONFIG)/tcp_client_posix_test $(BINDIR)/$(CONFIG)/tcp_posix_test $(BINDIR)/$(CONFIG)/tcp_server_posix_test $(BINDIR)/$(CONFIG)/time_averaged_stats_test $(BINDIR)/$(CONFIG)/time_test $(BINDIR)/$(CONFIG)/timeout_encoding_test $(BINDIR)/$(CONFIG)/timers_test $(BINDIR)/$(CONFIG)/transport_metadata_test $(BINDIR)/$(CONFIG)/transport_security_test $(BINDIR)/$(CONFIG)/uri_parser_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_test 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$(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/connection_prefix_bad_client_test $(BINDIR)/$(CONFIG)/initial_settings_frame_bad_client_test
 
 buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/async_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/async_unary_ping_pong_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/client_crash_test $(BINDIR)/$(CONFIG)/client_crash_test_server $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_byte_buffer_test $(BINDIR)/$(CONFIG)/cxx_slice_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/mock_test $(BINDIR)/$(CONFIG)/qps_interarrival_test $(BINDIR)/$(CONFIG)/qps_test $(BINDIR)/$(CONFIG)/qps_test_openloop $(BINDIR)/$(CONFIG)/secure_auth_context_test $(BINDIR)/$(CONFIG)/server_crash_test $(BINDIR)/$(CONFIG)/server_crash_test_client $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/thread_pool_test $(BINDIR)/$(CONFIG)/thread_stress_test
 
@@ -1494,6 +1502,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/grpc_credentials_test || ( echo test grpc_credentials_test failed ; exit 1 )
 	$(E) "[RUN]     Testing grpc_json_token_test"
 	$(Q) $(BINDIR)/$(CONFIG)/grpc_json_token_test || ( echo test grpc_json_token_test failed ; exit 1 )
+	$(E) "[RUN]     Testing grpc_jwt_verifier_test"
+	$(Q) $(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test || ( echo test grpc_jwt_verifier_test failed ; exit 1 )
 	$(E) "[RUN]     Testing grpc_security_connector_test"
 	$(Q) $(BINDIR)/$(CONFIG)/grpc_security_connector_test || ( echo test grpc_security_connector_test failed ; exit 1 )
 	$(E) "[RUN]     Testing grpc_stream_op_test"
@@ -2569,7 +2579,7 @@ test_python: static_c
 tools: tools_c tools_cxx
 
 
-tools_c: privatelibs_c $(BINDIR)/$(CONFIG)/gen_hpack_tables $(BINDIR)/$(CONFIG)/grpc_create_jwt $(BINDIR)/$(CONFIG)/grpc_fetch_oauth2 $(BINDIR)/$(CONFIG)/grpc_print_google_default_creds_token
+tools_c: privatelibs_c $(BINDIR)/$(CONFIG)/gen_hpack_tables $(BINDIR)/$(CONFIG)/grpc_create_jwt $(BINDIR)/$(CONFIG)/grpc_fetch_oauth2 $(BINDIR)/$(CONFIG)/grpc_print_google_default_creds_token $(BINDIR)/$(CONFIG)/grpc_verify_jwt
 
 tools_cxx: privatelibs_cxx
 
@@ -3210,6 +3220,7 @@ LIBGRPC_SRC = \
     src/core/security/credentials_win32.c \
     src/core/security/google_default_credentials.c \
     src/core/security/json_token.c \
+    src/core/security/jwt_verifier.c \
     src/core/security/secure_endpoint.c \
     src/core/security/secure_transport_setup.c \
     src/core/security/security_connector.c \
@@ -5752,7 +5763,7 @@ FD_CONSERVATION_POSIX_TEST_SRC = \
 FD_CONSERVATION_POSIX_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(FD_CONSERVATION_POSIX_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
 
-# You can't build secure targets if you don't have OpenSSL with ALPN.
+# You can't build secure targets if you don't have OpenSSL.
 
 $(BINDIR)/$(CONFIG)/fd_conservation_posix_test: openssl_dep_error
 
@@ -6645,6 +6656,35 @@ endif
 endif
 
 
+GRPC_JWT_VERIFIER_TEST_SRC = \
+    test/core/security/jwt_verifier_test.c \
+
+GRPC_JWT_VERIFIER_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GRPC_JWT_VERIFIER_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test: openssl_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test: $(GRPC_JWT_VERIFIER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(GRPC_JWT_VERIFIER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/security/jwt_verifier_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+deps_grpc_jwt_verifier_test: $(GRPC_JWT_VERIFIER_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GRPC_JWT_VERIFIER_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 GRPC_PRINT_GOOGLE_DEFAULT_CREDS_TOKEN_SRC = \
     test/core/security/print_google_default_creds_token.c \
 
@@ -6732,6 +6772,35 @@ endif
 endif
 
 
+GRPC_VERIFY_JWT_SRC = \
+    test/core/security/verify_jwt.c \
+
+GRPC_VERIFY_JWT_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GRPC_VERIFY_JWT_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/grpc_verify_jwt: openssl_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/grpc_verify_jwt: $(GRPC_VERIFY_JWT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(GRPC_VERIFY_JWT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/grpc_verify_jwt
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/security/verify_jwt.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+deps_grpc_verify_jwt: $(GRPC_VERIFY_JWT_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GRPC_VERIFY_JWT_OBJS:.o=.dep)
+endif
+endif
+
+
 HPACK_PARSER_TEST_SRC = \
     test/core/transport/chttp2/hpack_parser_test.c \
 
@@ -7086,7 +7155,7 @@ MULTIPLE_SERVER_QUEUES_TEST_SRC = \
 MULTIPLE_SERVER_QUEUES_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(MULTIPLE_SERVER_QUEUES_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
 
-# You can't build secure targets if you don't have OpenSSL with ALPN.
+# You can't build secure targets if you don't have OpenSSL.
 
 $(BINDIR)/$(CONFIG)/multiple_server_queues_test: openssl_dep_error
 
@@ -7550,7 +7619,7 @@ URI_PARSER_TEST_SRC = \
 URI_PARSER_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(URI_PARSER_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
 
-# You can't build secure targets if you don't have OpenSSL with ALPN.
+# You can't build secure targets if you don't have OpenSSL.
 
 $(BINDIR)/$(CONFIG)/uri_parser_test: openssl_dep_error
 
@@ -15897,6 +15966,7 @@ src/core/security/credentials_posix.c: $(OPENSSL_DEP)
 src/core/security/credentials_win32.c: $(OPENSSL_DEP)
 src/core/security/google_default_credentials.c: $(OPENSSL_DEP)
 src/core/security/json_token.c: $(OPENSSL_DEP)
+src/core/security/jwt_verifier.c: $(OPENSSL_DEP)
 src/core/security/secure_endpoint.c: $(OPENSSL_DEP)
 src/core/security/secure_transport_setup.c: $(OPENSSL_DEP)
 src/core/security/security_connector.c: $(OPENSSL_DEP)
diff --git a/build.json b/build.json
index e3268620d6..7d2242b116 100644
--- a/build.json
+++ b/build.json
@@ -453,6 +453,7 @@
         "src/core/security/base64.h",
         "src/core/security/credentials.h",
         "src/core/security/json_token.h",
+        "src/core/security/jwt_verifier.h",
         "src/core/security/secure_endpoint.h",
         "src/core/security/secure_transport_setup.h",
         "src/core/security/security_connector.h",
@@ -475,6 +476,7 @@
         "src/core/security/credentials_win32.c",
         "src/core/security/google_default_credentials.c",
         "src/core/security/json_token.c",
+        "src/core/security/jwt_verifier.c",
         "src/core/security/secure_endpoint.c",
         "src/core/security/secure_transport_setup.c",
         "src/core/security/security_connector.c",
@@ -1365,6 +1367,20 @@
       ]
     },
     {
+      "name": "grpc_jwt_verifier_test",
+      "build": "test",
+      "language": "c",
+      "src": [
+        "test/core/security/jwt_verifier_test.c"
+      ],
+      "deps": [
+        "grpc_test_util",
+        "grpc",
+        "gpr_test_util",
+        "gpr"
+      ]
+    },
+    {
       "name": "grpc_print_google_default_creds_token",
       "build": "tool",
       "language": "c",
@@ -1407,6 +1423,20 @@
       ]
     },
     {
+      "name": "grpc_verify_jwt",
+      "build": "tool",
+      "language": "c",
+      "src": [
+        "test/core/security/verify_jwt.c"
+      ],
+      "deps": [
+        "grpc_test_util",
+        "grpc",
+        "gpr_test_util",
+        "gpr"
+      ]
+    },
+    {
       "name": "hpack_parser_test",
       "build": "test",
       "language": "c",
diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index c3da84377a..c1b3394596 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -392,6 +392,50 @@ Asserts:
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response message against a golden response
 
+### oauth2_auth_token
+
+Similar to the other auth tests, this test is only for cloud-to-prod path.
+
+This test verifies unary calls succeed in sending messages using an OAuth2 token that is obtained OOB.  For the purpose of the test, the OAuth2 token is actually obtained from the service account credentials via the language-specific authorization library.  
+
+The difference between this test and the other auth tests is that rather than configuring the test client with ServiceAccountCredentials directly, the test first uses the authorization library to obtain an authorization token.
+
+The test
+- uses the flag`--service_account_key_file` with the path to a json key file
+downloaded from https://console.developers.google.com. Alternately, if using a usable auth implementation, it may specify the file location in the environment variable GOOGLE_APPLICATION_CREDENTIALS
+- uses the flag `--oauth_scope` for the oauth scope.  For testing against grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should be passed as the `--oauth_scope`.
+
+Server features:
+* [UnaryCall][]
+* [Compressable Payload][]
+* [Echo Authenticated Username][]
+* [Echo OAuth Scope][]
+
+Procedure:
+ 1. Client use the auth library to obtain an authorization token
+ 2. Client calls UnaryCall, attaching the authorization token obtained in step1, with the following message
+
+    ```
+    {
+      response_type: COMPRESSABLE
+      response_size: 314159
+      payload:{
+        body: 271828 bytes of zeros
+      }
+      fill_username: true
+      fill_oauth_scope: true
+    }
+    ```
+    
+Asserts:
+* call was successful
+* received SimpleResponse.username is in the json key file used by the auth library to obtain the authorization token
+* received SimpleResponse.oauth_scope is in `--oauth_scope`
+* response payload body is 314159 bytes in size
+* clients are free to assert that the response payload body contents are zero
+  and comparing the entire response message against a golden response
+
+
 ### Metadata (TODO: fix name)
 
 Status: Not yet implementable
@@ -560,11 +604,6 @@ Propagation of status code and message (yangg)
 
 Multiple thousand simultaneous calls on same Channel (ctiller)
 
-OAuth2 tokens + Service Credentials from GCE metadata server (GCE->prod only)
-(abhishek)
-
-OAuth2 tokens + JWT signing key (GCE->prod only) (abhishek)
-
 Metadata: client headers, server headers + trailers, binary+ascii
 
 #### Normal priority:
diff --git a/gRPC.podspec b/gRPC.podspec
index bdcbc3f612..921a4ab096 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -140,6 +140,7 @@ Pod::Spec.new do |s|
                       'src/core/security/base64.h',
                       'src/core/security/credentials.h',
                       'src/core/security/json_token.h',
+                      'src/core/security/jwt_verifier.h',
                       'src/core/security/secure_endpoint.h',
                       'src/core/security/secure_transport_setup.h',
                       'src/core/security/security_connector.h',
@@ -263,6 +264,7 @@ Pod::Spec.new do |s|
                       'src/core/security/credentials_win32.c',
                       'src/core/security/google_default_credentials.c',
                       'src/core/security/json_token.c',
+                      'src/core/security/jwt_verifier.c',
                       'src/core/security/secure_endpoint.c',
                       'src/core/security/secure_transport_setup.c',
                       'src/core/security/security_connector.c',
@@ -398,6 +400,7 @@ Pod::Spec.new do |s|
                               'src/core/security/base64.h',
                               'src/core/security/credentials.h',
                               'src/core/security/json_token.h',
+                              'src/core/security/jwt_verifier.h',
                               'src/core/security/secure_endpoint.h',
                               'src/core/security/secure_transport_setup.h',
                               'src/core/security/security_connector.h',
diff --git a/include/grpc++/credentials.h b/include/grpc++/credentials.h
index 7a40cd199d..0eaaefcbca 100644
--- a/include/grpc++/credentials.h
+++ b/include/grpc++/credentials.h
@@ -120,6 +120,12 @@ std::shared_ptr<Credentials> JWTCredentials(const grpc::string& json_key,
 std::shared_ptr<Credentials> RefreshTokenCredentials(
     const grpc::string& json_refresh_token);
 
+// Builds access token credentials.
+// access_token is an oauth2 access token that was fetched using an out of band
+// mechanism.
+std::shared_ptr<Credentials> AccessTokenCredentials(
+    const grpc::string& access_token);
+
 // Builds IAM credentials.
 std::shared_ptr<Credentials> IAMCredentials(
     const grpc::string& authorization_token,
diff --git a/include/grpc++/server.h b/include/grpc++/server.h
index 6a9e757e77..94ee0b6a4a 100644
--- a/include/grpc++/server.h
+++ b/include/grpc++/server.h
@@ -84,8 +84,8 @@ class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
          int max_message_size);
   // Register a service. This call does not take ownership of the service.
   // The service must exist for the lifetime of the Server instance.
-  bool RegisterService(RpcService* service);
-  bool RegisterAsyncService(AsynchronousService* service);
+  bool RegisterService(const grpc::string *host, RpcService* service);
+  bool RegisterAsyncService(const grpc::string *host, AsynchronousService* service);
   void RegisterAsyncGenericService(AsyncGenericService* service);
   // Add a listening port. Can be called multiple times.
   int AddListeningPort(const grpc::string& addr, ServerCredentials* creds);
diff --git a/include/grpc++/server_builder.h b/include/grpc++/server_builder.h
index ecee475e3e..44ee00eec9 100644
--- a/include/grpc++/server_builder.h
+++ b/include/grpc++/server_builder.h
@@ -58,17 +58,35 @@ class ServerBuilder {
   // Register a service. This call does not take ownership of the service.
   // The service must exist for the lifetime of the Server instance returned by
   // BuildAndStart().
+  // Matches requests with any :authority
   void RegisterService(SynchronousService* service);
 
-  // Register an asynchronous service. New calls will be delevered to cq.
+  // Register an asynchronous service.
   // This call does not take ownership of the service or completion queue.
   // The service and completion queuemust exist for the lifetime of the Server
   // instance returned by BuildAndStart().
+  // Matches requests with any :authority
   void RegisterAsyncService(AsynchronousService* service);
 
   // Register a generic service.
+  // Matches requests with any :authority
   void RegisterAsyncGenericService(AsyncGenericService* service);
 
+  // Register a service. This call does not take ownership of the service.
+  // The service must exist for the lifetime of the Server instance returned by
+  // BuildAndStart().
+  // Only matches requests with :authority \a host
+  void RegisterService(const grpc::string& host, 
+                       SynchronousService* service);
+
+  // Register an asynchronous service.
+  // This call does not take ownership of the service or completion queue.
+  // The service and completion queuemust exist for the lifetime of the Server
+  // instance returned by BuildAndStart().
+  // Only matches requests with :authority \a host
+  void RegisterAsyncService(const grpc::string& host, 
+                            AsynchronousService* service);
+
   // Set max message size in bytes.
   void SetMaxMessageSize(int max_message_size) {
     max_message_size_ = max_message_size;
@@ -98,9 +116,18 @@ class ServerBuilder {
     int* selected_port;
   };
 
+  typedef std::unique_ptr<grpc::string> HostString;
+  template <class T> struct NamedService {
+    explicit NamedService(T* s) : service(s) {}
+    NamedService(const grpc::string& h, T *s)
+        : host(new grpc::string(h)), service(s) {}
+    HostString host;
+    T* service;
+  };
+
   int max_message_size_;
-  std::vector<RpcService*> services_;
-  std::vector<AsynchronousService*> async_services_;
+  std::vector<std::unique_ptr<NamedService<RpcService>>> services_;
+  std::vector<std::unique_ptr<NamedService<AsynchronousService>>> async_services_;
   std::vector<Port> ports_;
   std::vector<ServerCompletionQueue*> cqs_;
   std::shared_ptr<ServerCredentials> creds_;
diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index 0154d8ac2a..8e8a896772 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -126,13 +126,18 @@ grpc_credentials *grpc_jwt_credentials_create(const char *json_key,
 grpc_credentials *grpc_refresh_token_credentials_create(
     const char *json_refresh_token);
 
-/* Creates a fake transport security credentials object for testing. */
-grpc_credentials *grpc_fake_transport_security_credentials_create(void);
+/* Creates an Oauth2 Access Token credentials with an access token that was
+   aquired by an out of band mechanism. */
+grpc_credentials *grpc_access_token_credentials_create(
+    const char *access_token);
 
 /* Creates an IAM credentials object. */
 grpc_credentials *grpc_iam_credentials_create(const char *authorization_token,
                                               const char *authority_selector);
 
+/* Creates a fake transport security credentials object for testing. */
+grpc_credentials *grpc_fake_transport_security_credentials_create(void);
+
 /* --- Secure channel creation. --- */
 
 /* The caller of the secure_channel_create functions may override the target
diff --git a/src/core/channel/census_filter.c b/src/core/channel/census_filter.c
index 83b7682848..43ef5fb3ff 100644
--- a/src/core/channel/census_filter.c
+++ b/src/core/channel/census_filter.c
@@ -197,7 +197,7 @@ static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = elem->channel_data;
   GPR_ASSERT(chand != NULL);
   if (chand->path_str != NULL) {
-    grpc_mdstr_unref(chand->path_str);
+    GRPC_MDSTR_UNREF(chand->path_str);
   }
 }
 
diff --git a/src/core/channel/client_channel.c b/src/core/channel/client_channel.c
index 871e970eb8..f890f99237 100644
--- a/src/core/channel/client_channel.c
+++ b/src/core/channel/client_channel.c
@@ -427,7 +427,7 @@ static void cc_on_config_changed(void *arg, int iomgr_success) {
     GRPC_RESOLVER_REF(resolver, "channel-next");
     gpr_mu_unlock(&chand->mu_config);
     GRPC_CHANNEL_INTERNAL_REF(chand->master, "resolver");
-    grpc_resolver_next(chand->resolver, &chand->incoming_configuration,
+    grpc_resolver_next(resolver, &chand->incoming_configuration,
                        &chand->on_config_changed);
     GRPC_RESOLVER_UNREF(resolver, "channel-next");
   } else {
diff --git a/src/core/channel/http_client_filter.c b/src/core/channel/http_client_filter.c
index 581eb13f58..63e4912397 100644
--- a/src/core/channel/http_client_filter.c
+++ b/src/core/channel/http_client_filter.c
@@ -108,13 +108,13 @@ static void hc_mutate_op(grpc_call_element *elem,
       /* Send : prefixed headers, which have to be before any application
          layer headers. */
       grpc_metadata_batch_add_head(&op->data.metadata, &calld->method,
-                                   grpc_mdelem_ref(channeld->method));
+                                   GRPC_MDELEM_REF(channeld->method));
       grpc_metadata_batch_add_head(&op->data.metadata, &calld->scheme,
-                                   grpc_mdelem_ref(channeld->scheme));
+                                   GRPC_MDELEM_REF(channeld->scheme));
       grpc_metadata_batch_add_tail(&op->data.metadata, &calld->te_trailers,
-                                   grpc_mdelem_ref(channeld->te_trailers));
+                                   GRPC_MDELEM_REF(channeld->te_trailers));
       grpc_metadata_batch_add_tail(&op->data.metadata, &calld->content_type,
-                                   grpc_mdelem_ref(channeld->content_type));
+                                   GRPC_MDELEM_REF(channeld->content_type));
       break;
     }
   }
@@ -196,11 +196,11 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   /* grab pointers to our data from the channel element */
   channel_data *channeld = elem->channel_data;
 
-  grpc_mdelem_unref(channeld->te_trailers);
-  grpc_mdelem_unref(channeld->method);
-  grpc_mdelem_unref(channeld->scheme);
-  grpc_mdelem_unref(channeld->content_type);
-  grpc_mdelem_unref(channeld->status);
+  GRPC_MDELEM_UNREF(channeld->te_trailers);
+  GRPC_MDELEM_UNREF(channeld->method);
+  GRPC_MDELEM_UNREF(channeld->scheme);
+  GRPC_MDELEM_UNREF(channeld->content_type);
+  GRPC_MDELEM_UNREF(channeld->status);
 }
 
 const grpc_channel_filter grpc_http_client_filter = {
diff --git a/src/core/channel/http_server_filter.c b/src/core/channel/http_server_filter.c
index db0bf590c6..a6cbb5a7f4 100644
--- a/src/core/channel/http_server_filter.c
+++ b/src/core/channel/http_server_filter.c
@@ -129,9 +129,9 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
     /* translate host to :authority since :authority may be
        omitted */
     grpc_mdelem *authority = grpc_mdelem_from_metadata_strings(
-        channeld->mdctx, grpc_mdstr_ref(channeld->authority_key),
-        grpc_mdstr_ref(md->value));
-    grpc_mdelem_unref(md);
+        channeld->mdctx, GRPC_MDSTR_REF(channeld->authority_key),
+        GRPC_MDSTR_REF(md->value));
+    GRPC_MDELEM_UNREF(md);
     return authority;
   } else {
     return md;
@@ -193,7 +193,7 @@ static void hs_mutate_op(grpc_call_element *elem,
       if (op->type != GRPC_OP_METADATA) continue;
       calld->sent_status = 1;
       grpc_metadata_batch_add_head(&op->data.metadata, &calld->status,
-                                   grpc_mdelem_ref(channeld->status_ok));
+                                   GRPC_MDELEM_REF(channeld->status_ok));
       break;
     }
   }
@@ -264,17 +264,17 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   /* grab pointers to our data from the channel element */
   channel_data *channeld = elem->channel_data;
 
-  grpc_mdelem_unref(channeld->te_trailers);
-  grpc_mdelem_unref(channeld->status_ok);
-  grpc_mdelem_unref(channeld->status_not_found);
-  grpc_mdelem_unref(channeld->method_post);
-  grpc_mdelem_unref(channeld->http_scheme);
-  grpc_mdelem_unref(channeld->https_scheme);
-  grpc_mdelem_unref(channeld->grpc_scheme);
-  grpc_mdelem_unref(channeld->content_type);
-  grpc_mdstr_unref(channeld->path_key);
-  grpc_mdstr_unref(channeld->authority_key);
-  grpc_mdstr_unref(channeld->host_key);
+  GRPC_MDELEM_UNREF(channeld->te_trailers);
+  GRPC_MDELEM_UNREF(channeld->status_ok);
+  GRPC_MDELEM_UNREF(channeld->status_not_found);
+  GRPC_MDELEM_UNREF(channeld->method_post);
+  GRPC_MDELEM_UNREF(channeld->http_scheme);
+  GRPC_MDELEM_UNREF(channeld->https_scheme);
+  GRPC_MDELEM_UNREF(channeld->grpc_scheme);
+  GRPC_MDELEM_UNREF(channeld->content_type);
+  GRPC_MDSTR_UNREF(channeld->path_key);
+  GRPC_MDSTR_UNREF(channeld->authority_key);
+  GRPC_MDSTR_UNREF(channeld->host_key);
 }
 
 const grpc_channel_filter grpc_http_server_filter = {
diff --git a/src/core/httpcli/httpcli.h b/src/core/httpcli/httpcli.h
index 06699e88c2..ab98178f8a 100644
--- a/src/core/httpcli/httpcli.h
+++ b/src/core/httpcli/httpcli.h
@@ -85,7 +85,7 @@ typedef struct grpc_httpcli_response {
   char *body;
 } grpc_httpcli_response;
 
-/* Callback for grpc_httpcli_get */
+/* Callback for grpc_httpcli_get and grpc_httpcli_post. */
 typedef void (*grpc_httpcli_response_cb)(void *user_data,
                                          const grpc_httpcli_response *response);
 
@@ -100,8 +100,6 @@ void grpc_httpcli_context_destroy(grpc_httpcli_context *context);
    'request' contains request parameters - these are caller owned and can be
      destroyed once the call returns
    'deadline' contains a deadline for the request (or gpr_inf_future)
-   'em' points to a caller owned event manager that must be alive for the
-     lifetime of the request
    'on_response' is a callback to report results to (and 'user_data' is a user
      supplied pointer to pass to said call) */
 void grpc_httpcli_get(grpc_httpcli_context *context, grpc_pollset *pollset,
diff --git a/src/core/json/json.h b/src/core/json/json.h
index b78b42a5b2..cac18ad885 100644
--- a/src/core/json/json.h
+++ b/src/core/json/json.h
@@ -53,7 +53,7 @@ typedef struct grpc_json {
 } grpc_json;
 
 /* The next two functions are going to parse the input string, and
- * destroy it in the process, in order to use its space to store
+ * modify it in the process, in order to use its space to store
  * all of the keys and values for the returned object tree.
  *
  * They assume UTF-8 input stream, and will output UTF-8 encoded
diff --git a/src/core/security/client_auth_filter.c b/src/core/security/client_auth_filter.c
index 632a742250..9e49a807f1 100644
--- a/src/core/security/client_auth_filter.c
+++ b/src/core/security/client_auth_filter.c
@@ -234,11 +234,11 @@ static void auth_start_transport_op(grpc_call_element *elem,
         /* Pointer comparison is OK for md_elems created from the same context.
          */
         if (md->key == chand->authority_string) {
-          if (calld->host != NULL) grpc_mdstr_unref(calld->host);
-          calld->host = grpc_mdstr_ref(md->value);
+          if (calld->host != NULL) GRPC_MDSTR_UNREF(calld->host);
+          calld->host = GRPC_MDSTR_REF(md->value);
         } else if (md->key == chand->path_string) {
-          if (calld->method != NULL) grpc_mdstr_unref(calld->method);
-          calld->method = grpc_mdstr_ref(md->value);
+          if (calld->method != NULL) GRPC_MDSTR_UNREF(calld->method);
+          calld->method = GRPC_MDSTR_REF(md->value);
         }
       }
       if (calld->host != NULL) {
@@ -288,10 +288,10 @@ static void destroy_call_elem(grpc_call_element *elem) {
   call_data *calld = elem->call_data;
   grpc_credentials_unref(calld->creds);
   if (calld->host != NULL) {
-    grpc_mdstr_unref(calld->host);
+    GRPC_MDSTR_UNREF(calld->host);
   }
   if (calld->method != NULL) {
-    grpc_mdstr_unref(calld->method);
+    GRPC_MDSTR_UNREF(calld->method);
   }
 }
 
@@ -330,16 +330,16 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   if (ctx != NULL)
     GRPC_SECURITY_CONNECTOR_UNREF(&ctx->base, "client_auth_filter");
   if (chand->authority_string != NULL) {
-    grpc_mdstr_unref(chand->authority_string);
+    GRPC_MDSTR_UNREF(chand->authority_string);
   }
   if (chand->error_msg_key != NULL) {
-    grpc_mdstr_unref(chand->error_msg_key);
+    GRPC_MDSTR_UNREF(chand->error_msg_key);
   }
   if (chand->status_key != NULL) {
-    grpc_mdstr_unref(chand->status_key);
+    GRPC_MDSTR_UNREF(chand->status_key);
   }
   if (chand->path_string != NULL) {
-    grpc_mdstr_unref(chand->path_string);
+    GRPC_MDSTR_UNREF(chand->path_string);
   }
 }
 
diff --git a/src/core/security/credentials.c b/src/core/security/credentials.c
index e79e9ce351..8d694c2f79 100644
--- a/src/core/security/credentials.c
+++ b/src/core/security/credentials.c
@@ -461,7 +461,6 @@ typedef struct {
   grpc_credentials_md_store *access_token_md;
   gpr_timespec token_expiration;
   grpc_httpcli_context httpcli_context;
-  grpc_pollset_set pollset_set;
   grpc_fetch_oauth2_func fetch_func;
 } grpc_oauth2_token_fetcher_credentials;
 
@@ -635,7 +634,7 @@ static void init_oauth2_token_fetcher(grpc_oauth2_token_fetcher_credentials *c,
   gpr_mu_init(&c->mu);
   c->token_expiration = gpr_inf_past;
   c->fetch_func = fetch_func;
-  grpc_pollset_set_init(&c->pollset_set);
+  grpc_httpcli_context_init(&c->httpcli_context);
 }
 
 /* -- ComputeEngine credentials. -- */
@@ -876,6 +875,59 @@ grpc_credentials *grpc_fake_oauth2_credentials_create(
   return &c->base;
 }
 
+/* -- Oauth2 Access Token credentials. -- */
+
+typedef struct {
+  grpc_credentials base;
+  grpc_credentials_md_store *access_token_md;
+} grpc_access_token_credentials;
+
+static void access_token_destroy(grpc_credentials *creds) {
+  grpc_access_token_credentials *c = (grpc_access_token_credentials *)creds;
+  grpc_credentials_md_store_unref(c->access_token_md);
+  gpr_free(c);
+}
+
+static int access_token_has_request_metadata(const grpc_credentials *creds) {
+  return 1;
+}
+
+static int access_token_has_request_metadata_only(
+    const grpc_credentials *creds) {
+  return 1;
+}
+
+static void access_token_get_request_metadata(grpc_credentials *creds,
+                                             grpc_pollset *pollset,
+                                             const char *service_url,
+                                             grpc_credentials_metadata_cb cb,
+                                             void *user_data) {
+  grpc_access_token_credentials *c = (grpc_access_token_credentials *)creds;
+  cb(user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK);
+}
+
+static grpc_credentials_vtable access_token_vtable = {
+    access_token_destroy, access_token_has_request_metadata,
+    access_token_has_request_metadata_only, access_token_get_request_metadata,
+    NULL};
+
+grpc_credentials *grpc_access_token_credentials_create(
+    const char *access_token) {
+  grpc_access_token_credentials *c =
+      gpr_malloc(sizeof(grpc_access_token_credentials));
+  char *token_md_value;
+  memset(c, 0, sizeof(grpc_access_token_credentials));
+  c->base.type = GRPC_CREDENTIALS_TYPE_OAUTH2;
+  c->base.vtable = &access_token_vtable;
+  gpr_ref_init(&c->base.refcount, 1);
+  c->access_token_md = grpc_credentials_md_store_create(1);
+  gpr_asprintf(&token_md_value, "Bearer %s", access_token);
+  grpc_credentials_md_store_add_cstrings(
+      c->access_token_md, GRPC_AUTHORIZATION_METADATA_KEY, token_md_value);
+  gpr_free(token_md_value);
+  return &c->base;
+}
+
 /* -- Fake transport security credentials. -- */
 
 static void fake_transport_security_credentials_destroy(
diff --git a/src/core/security/jwt_verifier.c b/src/core/security/jwt_verifier.c
new file mode 100644
index 0000000000..01007a1a84
--- /dev/null
+++ b/src/core/security/jwt_verifier.c
@@ -0,0 +1,830 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimser.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimser
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/security/jwt_verifier.h"
+
+#include <string.h>
+
+#include "src/core/httpcli/httpcli.h"
+#include "src/core/security/base64.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <openssl/pem.h>
+
+/* --- Utils. --- */
+
+const char *grpc_jwt_verifier_status_to_string(
+    grpc_jwt_verifier_status status) {
+  switch (status) {
+    case GRPC_JWT_VERIFIER_OK:
+      return "OK";
+    case GRPC_JWT_VERIFIER_BAD_SIGNATURE:
+      return "BAD_SIGNATURE";
+    case GRPC_JWT_VERIFIER_BAD_FORMAT:
+      return "BAD_FORMAT";
+    case GRPC_JWT_VERIFIER_BAD_AUDIENCE:
+      return "BAD_AUDIENCE";
+    case GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR:
+      return "KEY_RETRIEVAL_ERROR";
+    case GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE:
+      return "TIME_CONSTRAINT_FAILURE";
+    case GRPC_JWT_VERIFIER_GENERIC_ERROR:
+      return "GENERIC_ERROR";
+    default:
+      return "UNKNOWN";
+  }
+}
+
+static const EVP_MD *evp_md_from_alg(const char *alg) {
+  if (strcmp(alg, "RS256") == 0) {
+    return EVP_sha256();
+  } else if (strcmp(alg, "RS384") == 0) {
+    return EVP_sha384();
+  } else if (strcmp(alg, "RS512") == 0) {
+    return EVP_sha512();
+  } else {
+    return NULL;
+  }
+}
+
+static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
+                                           gpr_slice *buffer) {
+  grpc_json *json;
+
+  *buffer = grpc_base64_decode_with_len(str, len, 1);
+  if (GPR_SLICE_IS_EMPTY(*buffer)) {
+    gpr_log(GPR_ERROR, "Invalid base64.");
+    return NULL;
+  }
+  json = grpc_json_parse_string_with_len((char *)GPR_SLICE_START_PTR(*buffer),
+                                         GPR_SLICE_LENGTH(*buffer));
+  if (json == NULL) {
+    gpr_slice_unref(*buffer);
+    gpr_log(GPR_ERROR, "JSON parsing error.");
+  }
+  return json;
+}
+
+static const char *validate_string_field(const grpc_json *json,
+                                         const char *key) {
+  if (json->type != GRPC_JSON_STRING) {
+    gpr_log(GPR_ERROR, "Invalid %s field [%s]", key, json->value);
+    return NULL;
+  }
+  return json->value;
+}
+
+static gpr_timespec validate_time_field(const grpc_json *json,
+                                        const char *key) {
+  gpr_timespec result = gpr_time_0;
+  if (json->type != GRPC_JSON_NUMBER) {
+    gpr_log(GPR_ERROR, "Invalid %s field [%s]", key, json->value);
+    return result;
+  }
+  result.tv_sec = strtol(json->value, NULL, 10);
+  return result;
+}
+
+/* --- JOSE header. see http://tools.ietf.org/html/rfc7515#section-4 --- */
+
+typedef struct {
+  const char *alg;
+  const char *kid;
+  const char *typ;
+  /* TODO(jboeuf): Add others as needed (jku, jwk, x5u, x5c and so on...). */
+  gpr_slice buffer;
+} jose_header;
+
+static void jose_header_destroy(jose_header *h) {
+  gpr_slice_unref(h->buffer);
+  gpr_free(h);
+}
+
+/* Takes ownership of json and buffer. */
+static jose_header *jose_header_from_json(grpc_json *json, gpr_slice buffer) {
+  grpc_json *cur;
+  jose_header *h = gpr_malloc(sizeof(jose_header));
+  memset(h, 0, sizeof(jose_header));
+  h->buffer = buffer;
+  for (cur = json->child; cur != NULL; cur = cur->next) {
+    if (strcmp(cur->key, "alg") == 0) {
+      /* We only support RSA-1.5 signatures for now.
+         Beware of this if we add HMAC support:
+         https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/
+      */
+      if (cur->type != GRPC_JSON_STRING || strncmp(cur->value, "RS", 2) ||
+          evp_md_from_alg(cur->value) == NULL) {
+        gpr_log(GPR_ERROR, "Invalid alg field [%s]", cur->value);
+        goto error;
+      }
+      h->alg = cur->value;
+    } else if (strcmp(cur->key, "typ") == 0) {
+      h->typ = validate_string_field(cur, "typ");
+      if (h->typ == NULL) goto error;
+    } else if (strcmp(cur->key, "kid") == 0) {
+      h->kid = validate_string_field(cur, "kid");
+      if (h->kid == NULL) goto error;
+    }
+  }
+  if (h->alg == NULL) {
+    gpr_log(GPR_ERROR, "Missing alg field.");
+    goto error;
+  }
+  grpc_json_destroy(json);
+  h->buffer = buffer;
+  return h;
+
+error:
+  grpc_json_destroy(json);
+  jose_header_destroy(h);
+  return NULL;
+}
+
+/* --- JWT claims. see http://tools.ietf.org/html/rfc7519#section-4.1 */
+
+struct grpc_jwt_claims {
+  /* Well known properties already parsed. */
+  const char *sub;
+  const char *iss;
+  const char *aud;
+  const char *jti;
+  gpr_timespec iat;
+  gpr_timespec exp;
+  gpr_timespec nbf;
+
+  grpc_json *json;
+  gpr_slice buffer;
+};
+
+
+void grpc_jwt_claims_destroy(grpc_jwt_claims *claims) {
+  grpc_json_destroy(claims->json);
+  gpr_slice_unref(claims->buffer);
+  gpr_free(claims);
+}
+
+const grpc_json *grpc_jwt_claims_json(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return NULL;
+  return claims->json;
+}
+
+const char *grpc_jwt_claims_subject(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return NULL;
+  return claims->sub;
+}
+
+const char *grpc_jwt_claims_issuer(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return NULL;
+  return claims->iss;
+}
+
+const char *grpc_jwt_claims_id(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return NULL;
+  return claims->jti;
+}
+
+const char *grpc_jwt_claims_audience(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return NULL;
+  return claims->aud;
+}
+
+gpr_timespec grpc_jwt_claims_issued_at(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return gpr_inf_past;
+  return claims->iat;
+}
+
+gpr_timespec grpc_jwt_claims_expires_at(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return gpr_inf_future;
+  return claims->exp;
+}
+
+gpr_timespec grpc_jwt_claims_not_before(const grpc_jwt_claims *claims) {
+  if (claims == NULL) return gpr_inf_past;
+  return claims->nbf;
+}
+
+/* Takes ownership of json and buffer even in case of failure. */
+grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, gpr_slice buffer) {
+  grpc_json *cur;
+  grpc_jwt_claims *claims = gpr_malloc(sizeof(grpc_jwt_claims));
+  memset(claims, 0, sizeof(grpc_jwt_claims));
+  claims->json = json;
+  claims->buffer = buffer;
+  claims->iat = gpr_inf_past;
+  claims->nbf = gpr_inf_past;
+  claims->exp = gpr_inf_future;
+
+  /* Per the spec, all fields are optional. */
+  for (cur = json->child; cur != NULL; cur = cur->next) {
+    if (strcmp(cur->key, "sub") == 0) {
+      claims->sub = validate_string_field(cur, "sub");
+      if (claims->sub == NULL) goto error;
+    } else if (strcmp(cur->key, "iss") == 0) {
+      claims->iss = validate_string_field(cur, "iss");
+      if (claims->iss == NULL) goto error;
+    } else if (strcmp(cur->key, "aud") == 0) {
+      claims->aud = validate_string_field(cur, "aud");
+      if (claims->aud == NULL) goto error;
+    } else if (strcmp(cur->key, "jti") == 0) {
+      claims->jti = validate_string_field(cur, "jti");
+      if (claims->jti == NULL) goto error;
+    } else if (strcmp(cur->key, "iat") == 0) {
+      claims->iat = validate_time_field(cur, "iat");
+      if (gpr_time_cmp(claims->iat, gpr_time_0) == 0) goto error;
+    } else if (strcmp(cur->key, "exp") == 0) {
+      claims->exp = validate_time_field(cur, "exp");
+      if (gpr_time_cmp(claims->exp, gpr_time_0) == 0) goto error;
+    } else if (strcmp(cur->key, "nbf") == 0) {
+      claims->nbf = validate_time_field(cur, "nbf");
+      if (gpr_time_cmp(claims->nbf, gpr_time_0) == 0) goto error;
+    }
+  }
+  return claims;
+
+error:
+  grpc_jwt_claims_destroy(claims);
+  return NULL;
+}
+
+grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims *claims,
+                                               const char *audience) {
+  gpr_timespec skewed_now;
+  int audience_ok;
+
+  GPR_ASSERT(claims != NULL);
+
+  skewed_now = gpr_time_add(gpr_now(), grpc_jwt_verifier_clock_skew);
+  if (gpr_time_cmp(skewed_now, claims->nbf) < 0) {
+    gpr_log(GPR_ERROR, "JWT is not valid yet.");
+    return GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE;
+  }
+  skewed_now = gpr_time_sub(gpr_now(), grpc_jwt_verifier_clock_skew);
+  if (gpr_time_cmp(skewed_now, claims->exp) > 0) {
+    gpr_log(GPR_ERROR, "JWT is expired.");
+    return GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE;
+  }
+
+  if (audience == NULL) {
+    audience_ok = claims->aud == NULL;
+  } else {
+    audience_ok = claims->aud != NULL && strcmp(audience, claims->aud) == 0;
+  }
+  if (!audience_ok) {
+    gpr_log(GPR_ERROR, "Audience mismatch: expected %s and found %s.",
+            audience == NULL ? "NULL" : audience,
+            claims->aud == NULL ? "NULL" : claims->aud);
+    return GRPC_JWT_VERIFIER_BAD_AUDIENCE;
+  }
+  return GRPC_JWT_VERIFIER_OK;
+}
+
+/* --- verifier_cb_ctx object. --- */
+
+typedef struct {
+  grpc_jwt_verifier *verifier;
+  grpc_pollset *pollset;
+  jose_header *header;
+  grpc_jwt_claims *claims;
+  char *audience;
+  gpr_slice signature;
+  gpr_slice signed_data;
+  void *user_data;
+  grpc_jwt_verification_done_cb user_cb;
+} verifier_cb_ctx;
+
+/* Takes ownership of the header, claims and signature. */
+static verifier_cb_ctx *verifier_cb_ctx_create(
+    grpc_jwt_verifier *verifier, grpc_pollset *pollset,
+    jose_header * header, grpc_jwt_claims *claims, const char *audience,
+    gpr_slice signature, const char *signed_jwt, size_t signed_jwt_len,
+    void *user_data, grpc_jwt_verification_done_cb cb) {
+  verifier_cb_ctx *ctx = gpr_malloc(sizeof(verifier_cb_ctx));
+  memset(ctx, 0, sizeof(verifier_cb_ctx));
+  ctx->verifier = verifier;
+  ctx->pollset = pollset;
+  ctx->header = header;
+  ctx->audience = gpr_strdup(audience);
+  ctx->claims = claims;
+  ctx->signature = signature;
+  ctx->signed_data = gpr_slice_from_copied_buffer(signed_jwt, signed_jwt_len);
+  ctx->user_data = user_data;
+  ctx->user_cb = cb;
+  return ctx;
+}
+
+void verifier_cb_ctx_destroy(verifier_cb_ctx *ctx) {
+  if (ctx->audience != NULL) gpr_free(ctx->audience);
+  if (ctx->claims != NULL) grpc_jwt_claims_destroy(ctx->claims);
+  gpr_slice_unref(ctx->signature);
+  gpr_slice_unref(ctx->signed_data);
+  jose_header_destroy(ctx->header);
+  /* TODO: see what to do with claims... */
+  gpr_free(ctx);
+}
+
+/* --- grpc_jwt_verifier object. --- */
+
+/* Clock skew defaults to one minute. */
+gpr_timespec grpc_jwt_verifier_clock_skew = {60, 0};
+
+/* Max delay defaults to one minute. */
+gpr_timespec grpc_jwt_verifier_max_delay = {60, 0};
+
+typedef struct {
+  char *email_domain;
+  char *key_url_prefix;
+} email_key_mapping;
+
+struct grpc_jwt_verifier {
+  email_key_mapping *mappings;
+  size_t num_mappings; /* Should be very few, linear search ok. */
+  size_t allocated_mappings;
+  grpc_httpcli_context http_ctx;
+};
+
+static grpc_json *json_from_http(const grpc_httpcli_response *response) {
+  grpc_json *json = NULL;
+
+  if (response == NULL) {
+    gpr_log(GPR_ERROR, "HTTP response is NULL.");
+    return NULL;
+  }
+  if (response->status != 200) {
+    gpr_log(GPR_ERROR, "Call to http server failed with error %d.",
+            response->status);
+    return NULL;
+  }
+
+  json = grpc_json_parse_string_with_len(response->body, response->body_length);
+  if (json == NULL) {
+    gpr_log(GPR_ERROR, "Invalid JSON found in response.");
+  }
+  return json;
+}
+
+static const grpc_json *find_property_by_name(const grpc_json *json,
+                                              const char *name) {
+  const grpc_json *cur;
+  for (cur = json->child; cur != NULL; cur = cur->next) {
+    if (strcmp(cur->key, name) == 0) return cur;
+  }
+  return NULL;
+}
+
+static EVP_PKEY *extract_pkey_from_x509(const char *x509_str) {
+  X509 *x509 = NULL;
+  EVP_PKEY *result = NULL;
+  BIO *bio = BIO_new(BIO_s_mem());
+  BIO_write(bio, x509_str, strlen(x509_str));
+  x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
+  if (x509 == NULL) {
+    gpr_log(GPR_ERROR, "Unable to parse x509 cert.");
+    goto end;
+  }
+  result = X509_get_pubkey(x509);
+  if (result == NULL) {
+    gpr_log(GPR_ERROR, "Cannot find public key in X509 cert.");
+  }
+
+end:
+  BIO_free(bio);
+  if (x509 != NULL) X509_free(x509);
+  return result;
+}
+
+static BIGNUM *bignum_from_base64(const char *b64) {
+  BIGNUM *result = NULL;
+  gpr_slice bin;
+
+  if (b64 == NULL) return NULL;
+  bin = grpc_base64_decode(b64, 1);
+  if (GPR_SLICE_IS_EMPTY(bin)) {
+    gpr_log(GPR_ERROR, "Invalid base64 for big num.");
+    return NULL;
+  }
+  result = BN_bin2bn(GPR_SLICE_START_PTR(bin), GPR_SLICE_LENGTH(bin), NULL);
+  gpr_slice_unref(bin);
+  return result;
+}
+
+static EVP_PKEY *pkey_from_jwk(const grpc_json *json, const char *kty) {
+  const grpc_json *key_prop;
+  RSA *rsa = NULL;
+  EVP_PKEY *result = NULL;
+
+  GPR_ASSERT(kty != NULL && json != NULL);
+  if (strcmp(kty, "RSA") != 0) {
+    gpr_log(GPR_ERROR, "Unsupported key type %s.", kty);
+    goto end;
+  }
+  rsa = RSA_new();
+  if (rsa == NULL) {
+    gpr_log(GPR_ERROR, "Could not create rsa key.");
+    goto end;
+  }
+  for (key_prop = json->child; key_prop != NULL; key_prop = key_prop->next) {
+    if (strcmp(key_prop->key, "n") == 0) {
+      rsa->n = bignum_from_base64(validate_string_field(key_prop, "n"));
+      if (rsa->n == NULL) goto end;
+    } else if (strcmp(key_prop->key, "e") == 0) {
+      rsa->e = bignum_from_base64(validate_string_field(key_prop, "e"));
+      if (rsa->e == NULL) goto end;
+    }
+  }
+  if (rsa->e == NULL || rsa->n == NULL) {
+    gpr_log(GPR_ERROR, "Missing RSA public key field.");
+    goto end;
+  }
+  result = EVP_PKEY_new();
+  EVP_PKEY_set1_RSA(result, rsa); /* uprefs rsa. */
+
+end:
+  if (rsa != NULL) RSA_free(rsa);
+  return result;
+}
+
+static EVP_PKEY *find_verification_key(const grpc_json *json,
+                                       const char *header_alg,
+                                       const char *header_kid) {
+  const grpc_json *jkey;
+  const grpc_json *jwk_keys;
+  /* Try to parse the json as a JWK set:
+     https://tools.ietf.org/html/rfc7517#section-5. */
+  jwk_keys = find_property_by_name(json, "keys");
+  if (jwk_keys == NULL) {
+    /* Use the google proprietary format which is:
+      { <kid1>: <x5091>, <kid2>: <x5092>, ... } */
+    const grpc_json *cur = find_property_by_name(json, header_kid);
+    if (cur == NULL) return NULL;
+    return extract_pkey_from_x509(cur->value);
+  }
+
+  if (jwk_keys->type != GRPC_JSON_ARRAY) {
+    gpr_log(GPR_ERROR,
+            "Unexpected value type of keys property in jwks key set.");
+    return NULL;
+  }
+  /* Key format is specified in:
+     https://tools.ietf.org/html/rfc7518#section-6. */
+  for (jkey = jwk_keys->child; jkey != NULL; jkey = jkey->next) {
+    grpc_json *key_prop;
+    const char *alg = NULL;
+    const char *kid = NULL;
+    const char *kty = NULL;
+
+    if (jkey->type != GRPC_JSON_OBJECT) continue;
+    for (key_prop = jkey->child; key_prop != NULL; key_prop = key_prop->next) {
+      if (strcmp(key_prop->key, "alg") == 0 &&
+          key_prop->type == GRPC_JSON_STRING) {
+        alg = key_prop->value;
+      } else if (strcmp(key_prop->key, "kid") == 0 &&
+                 key_prop->type == GRPC_JSON_STRING) {
+        kid = key_prop->value;
+      } else if (strcmp(key_prop->key, "kty") == 0 &&
+                 key_prop->type == GRPC_JSON_STRING) {
+        kty = key_prop->value;
+      }
+    }
+    if (alg != NULL && kid != NULL && kty != NULL &&
+        strcmp(kid, header_kid) == 0 && strcmp(alg, header_alg) == 0) {
+      return pkey_from_jwk(jkey, kty);
+    }
+  }
+  gpr_log(GPR_ERROR,
+          "Could not find matching key in key set for kid=%s and alg=%s",
+          header_kid, header_alg);
+  return NULL;
+}
+
+static int verify_jwt_signature(EVP_PKEY *key, const char *alg,
+                                gpr_slice signature, gpr_slice signed_data) {
+  EVP_MD_CTX *md_ctx = EVP_MD_CTX_create();
+  const EVP_MD *md = evp_md_from_alg(alg);
+  int result = 0;
+
+  GPR_ASSERT(md != NULL); /* Checked before. */
+  if (md_ctx == NULL) {
+    gpr_log(GPR_ERROR, "Could not create EVP_MD_CTX.");
+    goto end;
+  }
+  if (EVP_DigestVerifyInit(md_ctx, NULL, md, NULL, key) != 1) {
+    gpr_log(GPR_ERROR, "EVP_DigestVerifyInit failed.");
+    goto end;
+  }
+  if (EVP_DigestVerifyUpdate(md_ctx, GPR_SLICE_START_PTR(signed_data),
+                             GPR_SLICE_LENGTH(signed_data)) != 1) {
+    gpr_log(GPR_ERROR, "EVP_DigestVerifyUpdate failed.");
+    goto end;
+  }
+  if (EVP_DigestVerifyFinal(md_ctx, GPR_SLICE_START_PTR(signature),
+                            GPR_SLICE_LENGTH(signature)) != 1) {
+    gpr_log(GPR_ERROR, "JWT signature verification failed.");
+    goto end;
+  }
+  result = 1;
+
+end:
+  if (md_ctx != NULL) EVP_MD_CTX_destroy(md_ctx);
+  return result;
+}
+
+static void on_keys_retrieved(void *user_data,
+                              const grpc_httpcli_response *response) {
+  grpc_json *json = json_from_http(response);
+  verifier_cb_ctx *ctx = (verifier_cb_ctx *)user_data;
+  EVP_PKEY *verification_key = NULL;
+  grpc_jwt_verifier_status status = GRPC_JWT_VERIFIER_GENERIC_ERROR;
+  grpc_jwt_claims *claims = NULL;
+
+  if (json == NULL) {
+    status = GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR;
+    goto end;
+  }
+  verification_key =
+      find_verification_key(json, ctx->header->alg, ctx->header->kid);
+  if (verification_key == NULL) {
+    gpr_log(GPR_ERROR, "Could not find verification key with kid %s.",
+            ctx->header->kid);
+    status = GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR;
+    goto end;
+  }
+
+  if (!verify_jwt_signature(verification_key, ctx->header->alg, ctx->signature,
+                            ctx->signed_data)) {
+    status = GRPC_JWT_VERIFIER_BAD_SIGNATURE;
+    goto end;
+  }
+
+  status = grpc_jwt_claims_check(ctx->claims, ctx->audience);
+  if (status == GRPC_JWT_VERIFIER_OK) {
+    /* Pass ownership. */
+    claims = ctx->claims;
+    ctx->claims = NULL;
+  }
+
+end:
+  if (json != NULL) grpc_json_destroy(json);
+  if (verification_key != NULL) EVP_PKEY_free(verification_key);
+  ctx->user_cb(ctx->user_data, status, claims);
+  verifier_cb_ctx_destroy(ctx);
+}
+
+static void on_openid_config_retrieved(void *user_data,
+                                       const grpc_httpcli_response *response) {
+  const grpc_json* cur;
+  grpc_json *json = json_from_http(response);
+  verifier_cb_ctx *ctx = (verifier_cb_ctx *)user_data;
+  grpc_httpcli_request req;
+  const char *jwks_uri;
+
+  /* TODO(jboeuf): Cache the jwks_uri in order to avoid this hop next time.*/
+  if (json == NULL) goto error;
+  cur = find_property_by_name(json, "jwks_uri");
+  if (cur == NULL) {
+    gpr_log(GPR_ERROR, "Could not find jwks_uri in openid config.");
+    goto error;
+  }
+  jwks_uri = validate_string_field(cur, "jwks_uri");
+  if (jwks_uri == NULL) goto error;
+  if (strstr(jwks_uri, "https://") != jwks_uri) {
+    gpr_log(GPR_ERROR, "Invalid non https jwks_uri: %s.", jwks_uri);
+    goto error;
+  }
+  jwks_uri += 8;
+  req.use_ssl = 1;
+  req.host = gpr_strdup(jwks_uri);
+  req.path = strchr(jwks_uri, '/');
+  if (req.path == NULL) {
+    req.path = "";
+  } else {
+    *(req.host + (req.path - jwks_uri)) = '\0';
+  }
+  grpc_httpcli_get(&ctx->verifier->http_ctx, ctx->pollset, &req,
+                   gpr_time_add(gpr_now(), grpc_jwt_verifier_max_delay),
+                   on_keys_retrieved, ctx);
+  grpc_json_destroy(json);
+  gpr_free(req.host);
+  return;
+
+error:
+  if (json != NULL) grpc_json_destroy(json);
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, NULL);
+  verifier_cb_ctx_destroy(ctx);
+}
+
+static email_key_mapping *verifier_get_mapping(
+    grpc_jwt_verifier *v, const char *email_domain) {
+  size_t i;
+  if (v->mappings == NULL) return NULL;
+  for (i = 0; i < v->num_mappings; i++) {
+    if (strcmp(email_domain, v->mappings[i].email_domain) == 0) {
+      return &v->mappings[i];
+    }
+  }
+  return NULL;
+}
+
+static void verifier_put_mapping(grpc_jwt_verifier *v, const char *email_domain,
+                                 const char *key_url_prefix) {
+  email_key_mapping *mapping = verifier_get_mapping(v, email_domain);
+  GPR_ASSERT(v->num_mappings < v->allocated_mappings);
+  if (mapping != NULL) {
+    gpr_free(mapping->key_url_prefix);
+    mapping->key_url_prefix = gpr_strdup(key_url_prefix);
+    return;
+  }
+  v->mappings[v->num_mappings].email_domain = gpr_strdup(email_domain);
+  v->mappings[v->num_mappings].key_url_prefix = gpr_strdup(key_url_prefix);
+  v->num_mappings++;
+  GPR_ASSERT(v->num_mappings <= v->allocated_mappings);
+}
+
+/* Takes ownership of ctx. */
+static void retrieve_key_and_verify(verifier_cb_ctx *ctx) {
+  const char *at_sign;
+  grpc_httpcli_response_cb http_cb;
+  char *path_prefix = NULL;
+  const char *iss;
+  grpc_httpcli_request req;
+  memset(&req, 0, sizeof(grpc_httpcli_request));
+  req.use_ssl = 1;
+
+  GPR_ASSERT(ctx != NULL && ctx->header != NULL && ctx->claims != NULL);
+  iss = ctx->claims->iss;
+  if (ctx->header->kid == NULL) {
+    gpr_log(GPR_ERROR, "Missing kid in jose header.");
+    goto error;
+  }
+  if (iss == NULL) {
+    gpr_log(GPR_ERROR, "Missing iss in claims.");
+    goto error;
+  }
+
+  /* This code relies on:
+     https://openid.net/specs/openid-connect-discovery-1_0.html
+     Nobody seems to implement the account/email/webfinger part 2. of the spec
+     so we will rely instead on email/url mappings if we detect such an issuer.
+     Part 4, on the other hand is implemented by both google and salesforce. */
+
+  /* Very non-sophisticated way to detect an email address. Should be good
+     enough for now... */
+  at_sign = strchr(iss, '@');
+  if (at_sign != NULL) {
+    email_key_mapping *mapping;
+    const char *email_domain = at_sign + 1;
+    GPR_ASSERT(ctx->verifier != NULL);
+    mapping = verifier_get_mapping(ctx->verifier, email_domain);
+    if (mapping == NULL) {
+      gpr_log(GPR_ERROR, "Missing mapping for issuer email.");
+      goto error;
+    }
+    req.host = gpr_strdup(mapping->key_url_prefix);
+    path_prefix = strchr(req.host, '/');
+    if (path_prefix == NULL) {
+      gpr_asprintf(&req.path, "/%s", iss);
+    } else {
+      *(path_prefix++) = '\0';
+      gpr_asprintf(&req.path, "/%s/%s", path_prefix, iss);
+    }
+    http_cb = on_keys_retrieved;
+  } else {
+    req.host = gpr_strdup(strstr(iss, "https://") == iss ? iss + 8 : iss);
+    path_prefix = strchr(req.host, '/');
+    if (path_prefix == NULL) {
+      req.path = gpr_strdup(GRPC_OPENID_CONFIG_URL_SUFFIX);
+    } else {
+      *(path_prefix++) = 0;
+      gpr_asprintf(&req.path, "/%s%s", path_prefix,
+                   GRPC_OPENID_CONFIG_URL_SUFFIX);
+    }
+    http_cb = on_openid_config_retrieved;
+  }
+
+  grpc_httpcli_get(&ctx->verifier->http_ctx, ctx->pollset, &req,
+                   gpr_time_add(gpr_now(), grpc_jwt_verifier_max_delay),
+                   http_cb, ctx);
+  gpr_free(req.host);
+  gpr_free(req.path);
+  return;
+
+error:
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, NULL);
+  verifier_cb_ctx_destroy(ctx);
+}
+
+void grpc_jwt_verifier_verify(grpc_jwt_verifier *verifier,
+                              grpc_pollset *pollset, const char *jwt,
+                              const char *audience,
+                              grpc_jwt_verification_done_cb cb,
+                              void *user_data) {
+  const char *dot = NULL;
+  grpc_json *json;
+  jose_header *header = NULL;
+  grpc_jwt_claims *claims = NULL;
+  gpr_slice header_buffer;
+  gpr_slice claims_buffer;
+  gpr_slice signature;
+  size_t signed_jwt_len;
+  const char *cur = jwt;
+
+  GPR_ASSERT(verifier != NULL && jwt != NULL && audience != NULL && cb != NULL);
+  dot = strchr(cur, '.');
+  if (dot == NULL) goto error;
+  json = parse_json_part_from_jwt(cur, dot - cur, &header_buffer);
+  if (json == NULL)  goto error;
+  header = jose_header_from_json(json, header_buffer);
+  if (header == NULL) goto error;
+
+  cur = dot + 1;
+  dot = strchr(cur, '.');
+  if (dot == NULL) goto error;
+  json = parse_json_part_from_jwt(cur, dot - cur, &claims_buffer);
+  if (json == NULL)  goto error;
+  claims = grpc_jwt_claims_from_json(json, claims_buffer);
+  if (claims == NULL) goto error;
+
+  signed_jwt_len = (size_t)(dot - jwt);
+  cur = dot + 1;
+  signature = grpc_base64_decode(cur, 1);
+  if (GPR_SLICE_IS_EMPTY(signature)) goto error;
+  retrieve_key_and_verify(
+      verifier_cb_ctx_create(verifier, pollset, header, claims, audience,
+                             signature, jwt, signed_jwt_len, user_data, cb));
+  return;
+
+error:
+  if (header != NULL) jose_header_destroy(header);
+  if (claims != NULL) grpc_jwt_claims_destroy(claims);
+  cb(user_data, GRPC_JWT_VERIFIER_BAD_FORMAT, NULL);
+}
+
+grpc_jwt_verifier *grpc_jwt_verifier_create(
+    const grpc_jwt_verifier_email_domain_key_url_mapping *mappings,
+    size_t num_mappings) {
+  grpc_jwt_verifier *v = gpr_malloc(sizeof(grpc_jwt_verifier));
+  memset(v, 0, sizeof(grpc_jwt_verifier));
+  grpc_httpcli_context_init(&v->http_ctx);
+
+  /* We know at least of one mapping. */
+  v->allocated_mappings = 1 + num_mappings;
+  v->mappings = gpr_malloc(v->allocated_mappings * sizeof(email_key_mapping));
+  verifier_put_mapping(v, GRPC_GOOGLE_SERVICE_ACCOUNTS_EMAIL_DOMAIN,
+                       GRPC_GOOGLE_SERVICE_ACCOUNTS_KEY_URL_PREFIX);
+  /* User-Provided mappings. */
+  if (mappings != NULL) {
+    size_t i;
+    for (i = 0; i < num_mappings; i++) {
+      verifier_put_mapping(v, mappings[i].email_domain,
+                           mappings[i].key_url_prefix);
+    }
+  }
+  return v;
+}
+
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier *v) {
+  size_t i;
+  if (v == NULL) return;
+  grpc_httpcli_context_destroy(&v->http_ctx);
+  if (v->mappings != NULL) {
+    for (i = 0; i < v->num_mappings; i++) {
+      gpr_free(v->mappings[i].email_domain);
+      gpr_free(v->mappings[i].key_url_prefix);
+    }
+    gpr_free(v->mappings);
+  }
+  gpr_free(v);
+}
+
diff --git a/src/core/security/jwt_verifier.h b/src/core/security/jwt_verifier.h
new file mode 100644
index 0000000000..8077e24883
--- /dev/null
+++ b/src/core/security/jwt_verifier.h
@@ -0,0 +1,136 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimser.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimser
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H
+#define GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H
+
+#include "src/core/iomgr/pollset.h"
+#include "src/core/json/json.h"
+
+#include <grpc/support/slice.h>
+#include <grpc/support/time.h>
+
+/* --- Constants. --- */
+
+#define GRPC_OPENID_CONFIG_URL_SUFFIX "/.well-known/openid-configuration"
+#define GRPC_GOOGLE_SERVICE_ACCOUNTS_EMAIL_DOMAIN \
+  "developer.gserviceaccount.com"
+#define GRPC_GOOGLE_SERVICE_ACCOUNTS_KEY_URL_PREFIX \
+  "www.googleapis.com/robot/v1/metadata/x509"
+
+/* --- grpc_jwt_verifier_status. --- */
+
+typedef enum {
+  GRPC_JWT_VERIFIER_OK = 0,
+  GRPC_JWT_VERIFIER_BAD_SIGNATURE,
+  GRPC_JWT_VERIFIER_BAD_FORMAT,
+  GRPC_JWT_VERIFIER_BAD_AUDIENCE,
+  GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR,
+  GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE,
+  GRPC_JWT_VERIFIER_GENERIC_ERROR
+} grpc_jwt_verifier_status;
+
+const char *grpc_jwt_verifier_status_to_string(grpc_jwt_verifier_status status);
+
+/* --- grpc_jwt_claims. --- */
+
+typedef struct grpc_jwt_claims grpc_jwt_claims;
+
+void grpc_jwt_claims_destroy(grpc_jwt_claims *claims);
+
+/* Returns the whole JSON tree of the claims. */
+const grpc_json *grpc_jwt_claims_json(const grpc_jwt_claims *claims);
+
+/* Access to registered claims in https://tools.ietf.org/html/rfc7519#page-9 */
+const char *grpc_jwt_claims_subject(const grpc_jwt_claims *claims);
+const char *grpc_jwt_claims_issuer(const grpc_jwt_claims *claims);
+const char *grpc_jwt_claims_id(const grpc_jwt_claims *claims);
+const char *grpc_jwt_claims_audience(const grpc_jwt_claims *claims);
+gpr_timespec grpc_jwt_claims_issued_at(const grpc_jwt_claims *claims);
+gpr_timespec grpc_jwt_claims_expires_at(const grpc_jwt_claims *claims);
+gpr_timespec grpc_jwt_claims_not_before(const grpc_jwt_claims *claims);
+
+/* --- grpc_jwt_verifier. --- */
+
+typedef struct grpc_jwt_verifier grpc_jwt_verifier;
+
+typedef struct {
+  /* The email domain is the part after the @ sign. */
+  const char *email_domain;
+
+  /* The key url prefix will be used to get the public key from the issuer:
+     https://<key_url_prefix>/<issuer_email>
+     Therefore the key_url_prefix must NOT contain https://. */
+  const char *key_url_prefix;
+} grpc_jwt_verifier_email_domain_key_url_mapping;
+
+/* Globals to control the verifier. Not thread-safe. */
+extern gpr_timespec grpc_jwt_verifier_clock_skew;
+extern gpr_timespec grpc_jwt_verifier_max_delay;
+
+/* The verifier can be created with some custom mappings to help with key
+   discovery in the case where the issuer is an email address.
+   mappings can be NULL in which case num_mappings MUST be 0.
+   A verifier object has one built-in mapping (unless overridden):
+   GRPC_GOOGLE_SERVICE_ACCOUNTS_EMAIL_DOMAIN ->
+   GRPC_GOOGLE_SERVICE_ACCOUNTS_KEY_URL_PREFIX.*/
+grpc_jwt_verifier *grpc_jwt_verifier_create(
+    const grpc_jwt_verifier_email_domain_key_url_mapping *mappings,
+    size_t num_mappings);
+
+/*The verifier must not be destroyed if there are still outstanding callbacks.*/
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier *verifier);
+
+/* User provided callback that will be called when the verification of the JWT
+   is done (maybe in another thread).
+   It is the responsibility of the callee to call grpc_jwt_claims_destroy on
+   the claims. */
+typedef void (*grpc_jwt_verification_done_cb)(void *user_data,
+                                              grpc_jwt_verifier_status status,
+                                              grpc_jwt_claims *claims);
+
+/* Verifies for the JWT for the given expected audience. */
+void grpc_jwt_verifier_verify(grpc_jwt_verifier *verifier,
+                              grpc_pollset *pollset, const char *jwt,
+                              const char *audience,
+                              grpc_jwt_verification_done_cb cb,
+                              void *user_data);
+
+/* --- TESTING ONLY exposed functions. --- */
+
+grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, gpr_slice buffer);
+grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims *claims,
+                                               const char *audience);
+
+#endif /* GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H */
+
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index a28a542c8d..fb3b0b1918 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -367,18 +367,18 @@ static void destroy_call(void *call, int ignored_success) {
   gpr_mu_destroy(&c->mu);
   for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
     if (c->status[i].details) {
-      grpc_mdstr_unref(c->status[i].details);
+      GRPC_MDSTR_UNREF(c->status[i].details);
     }
   }
   for (i = 0; i < c->owned_metadata_count; i++) {
-    grpc_mdelem_unref(c->owned_metadata[i]);
+    GRPC_MDELEM_UNREF(c->owned_metadata[i]);
   }
   gpr_free(c->owned_metadata);
   for (i = 0; i < GPR_ARRAY_SIZE(c->buffered_metadata); i++) {
     gpr_free(c->buffered_metadata[i].metadata);
   }
   for (i = 0; i < c->send_initial_metadata_count; i++) {
-    grpc_mdelem_unref(c->send_initial_metadata[i].md);
+    GRPC_MDELEM_UNREF(c->send_initial_metadata[i].md);
   }
   for (i = 0; i < GRPC_CONTEXT_COUNT; i++) {
     if (c->context[i].destroy) {
@@ -435,7 +435,7 @@ static void set_decode_compression_level(grpc_call *call,
 static void set_status_details(grpc_call *call, status_source source,
                                grpc_mdstr *status) {
   if (call->status[source].details != NULL) {
-    grpc_mdstr_unref(call->status[source].details);
+    GRPC_MDSTR_UNREF(call->status[source].details);
   }
   call->status[source].details = status;
 }
@@ -614,7 +614,7 @@ static void finish_live_ioreq_op(grpc_call *call, grpc_ioreq_op op,
         case GRPC_IOREQ_SEND_STATUS:
           if (call->request_data[GRPC_IOREQ_SEND_STATUS].send_status.details !=
               NULL) {
-            grpc_mdstr_unref(
+            GRPC_MDSTR_UNREF(
                 call->request_data[GRPC_IOREQ_SEND_STATUS].send_status.details);
             call->request_data[GRPC_IOREQ_SEND_STATUS].send_status.details =
                 NULL;
@@ -943,7 +943,7 @@ static int fill_send_ops(grpc_call *call, grpc_transport_stream_op *op) {
                 &mdb, &call->details_link,
                 grpc_mdelem_from_metadata_strings(
                     call->metadata_context,
-                    grpc_mdstr_ref(
+                    GRPC_MDSTR_REF(
                         grpc_channel_get_message_string(call->channel)),
                     data.send_status.details));
             call->request_data[GRPC_IOREQ_SEND_STATUS].send_status.details =
@@ -1051,7 +1051,7 @@ static grpc_call_error start_ioreq(grpc_call *call, const grpc_ioreq *reqs,
                       reqs[i].data.send_status.code);
       if (reqs[i].data.send_status.details) {
         set_status_details(call, STATUS_FROM_SERVER_STATUS,
-                           grpc_mdstr_ref(reqs[i].data.send_status.details));
+                           GRPC_MDSTR_REF(reqs[i].data.send_status.details));
       }
     }
     have_ops |= 1u << op;
@@ -1255,7 +1255,7 @@ static void recv_metadata(grpc_call *call, grpc_metadata_batch *md) {
     if (key == grpc_channel_get_status_string(call->channel)) {
       set_status_code(call, STATUS_FROM_WIRE, decode_status(md));
     } else if (key == grpc_channel_get_message_string(call->channel)) {
-      set_status_details(call, STATUS_FROM_WIRE, grpc_mdstr_ref(md->value));
+      set_status_details(call, STATUS_FROM_WIRE, GRPC_MDSTR_REF(md->value));
     } else if (key ==
                grpc_channel_get_compresssion_level_string(call->channel)) {
       set_decode_compression_level(call, decode_compression(md));
@@ -1291,10 +1291,10 @@ static void recv_metadata(grpc_call *call, grpc_metadata_batch *md) {
 
   grpc_mdctx_lock(mdctx);
   for (l = md->list.head; l; l = l->next) {
-    if (l->md) grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
+    if (l->md) GRPC_MDCTX_LOCKED_MDELEM_UNREF(mdctx, l->md);
   }
   for (l = md->garbage.head; l; l = l->next) {
-    grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
+    GRPC_MDCTX_LOCKED_MDELEM_UNREF(mdctx, l->md);
   }
   grpc_mdctx_unlock(mdctx);
 }
diff --git a/src/core/surface/channel.c b/src/core/surface/channel.c
index f8151c121c..eeae3b507c 100644
--- a/src/core/surface/channel.c
+++ b/src/core/surface/channel.c
@@ -104,7 +104,7 @@ grpc_channel *grpc_channel_create_from_filters(
     char buf[GPR_LTOA_MIN_BUFSIZE];
     gpr_ltoa(i, buf);
     channel->grpc_status_elem[i] = grpc_mdelem_from_metadata_strings(
-        mdctx, grpc_mdstr_ref(channel->grpc_status_string),
+        mdctx, GRPC_MDSTR_REF(channel->grpc_status_string),
         grpc_mdstr_from_string(mdctx, buf));
   }
   channel->path_string = grpc_mdstr_from_string(mdctx, ":path");
@@ -157,10 +157,10 @@ grpc_call *grpc_channel_create_call(grpc_channel *channel,
   return grpc_channel_create_call_internal(
       channel, cq,
       grpc_mdelem_from_metadata_strings(
-          channel->metadata_context, grpc_mdstr_ref(channel->path_string),
+          channel->metadata_context, GRPC_MDSTR_REF(channel->path_string),
           grpc_mdstr_from_string(channel->metadata_context, method)),
       grpc_mdelem_from_metadata_strings(
-          channel->metadata_context, grpc_mdstr_ref(channel->authority_string),
+          channel->metadata_context, GRPC_MDSTR_REF(channel->authority_string),
           grpc_mdstr_from_string(channel->metadata_context, host)),
       deadline);
 }
@@ -169,10 +169,10 @@ void *grpc_channel_register_call(grpc_channel *channel, const char *method,
                                  const char *host) {
   registered_call *rc = gpr_malloc(sizeof(registered_call));
   rc->path = grpc_mdelem_from_metadata_strings(
-      channel->metadata_context, grpc_mdstr_ref(channel->path_string),
+      channel->metadata_context, GRPC_MDSTR_REF(channel->path_string),
       grpc_mdstr_from_string(channel->metadata_context, method));
   rc->authority = grpc_mdelem_from_metadata_strings(
-      channel->metadata_context, grpc_mdstr_ref(channel->authority_string),
+      channel->metadata_context, GRPC_MDSTR_REF(channel->authority_string),
       grpc_mdstr_from_string(channel->metadata_context, host));
   gpr_mu_lock(&channel->registered_call_mu);
   rc->next = channel->registered_calls;
@@ -186,8 +186,8 @@ grpc_call *grpc_channel_create_registered_call(
     void *registered_call_handle, gpr_timespec deadline) {
   registered_call *rc = registered_call_handle;
   return grpc_channel_create_call_internal(
-      channel, completion_queue, grpc_mdelem_ref(rc->path),
-      grpc_mdelem_ref(rc->authority), deadline);
+      channel, completion_queue, GRPC_MDELEM_REF(rc->path),
+      GRPC_MDELEM_REF(rc->authority), deadline);
 }
 
 #ifdef GRPC_CHANNEL_REF_COUNT_DEBUG
@@ -205,18 +205,18 @@ static void destroy_channel(void *p, int ok) {
   size_t i;
   grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CHANNEL(channel));
   for (i = 0; i < NUM_CACHED_STATUS_ELEMS; i++) {
-    grpc_mdelem_unref(channel->grpc_status_elem[i]);
+    GRPC_MDELEM_UNREF(channel->grpc_status_elem[i]);
   }
-  grpc_mdstr_unref(channel->grpc_status_string);
-  grpc_mdstr_unref(channel->grpc_compression_level_string);
-  grpc_mdstr_unref(channel->grpc_message_string);
-  grpc_mdstr_unref(channel->path_string);
-  grpc_mdstr_unref(channel->authority_string);
+  GRPC_MDSTR_UNREF(channel->grpc_status_string);
+  GRPC_MDSTR_UNREF(channel->grpc_compression_level_string);
+  GRPC_MDSTR_UNREF(channel->grpc_message_string);
+  GRPC_MDSTR_UNREF(channel->path_string);
+  GRPC_MDSTR_UNREF(channel->authority_string);
   while (channel->registered_calls) {
     registered_call *rc = channel->registered_calls;
     channel->registered_calls = rc->next;
-    grpc_mdelem_unref(rc->path);
-    grpc_mdelem_unref(rc->authority);
+    GRPC_MDELEM_UNREF(rc->path);
+    GRPC_MDELEM_UNREF(rc->authority);
     gpr_free(rc);
   }
   grpc_mdctx_unref(channel->metadata_context);
@@ -267,12 +267,12 @@ grpc_mdstr *grpc_channel_get_compresssion_level_string(grpc_channel *channel) {
 
 grpc_mdelem *grpc_channel_get_reffed_status_elem(grpc_channel *channel, int i) {
   if (i >= 0 && i < NUM_CACHED_STATUS_ELEMS) {
-    return grpc_mdelem_ref(channel->grpc_status_elem[i]);
+    return GRPC_MDELEM_REF(channel->grpc_status_elem[i]);
   } else {
     char tmp[GPR_LTOA_MIN_BUFSIZE];
     gpr_ltoa(i, tmp);
     return grpc_mdelem_from_metadata_strings(
-        channel->metadata_context, grpc_mdstr_ref(channel->grpc_status_string),
+        channel->metadata_context, GRPC_MDSTR_REF(channel->grpc_status_string),
         grpc_mdstr_from_string(channel->metadata_context, tmp));
   }
 }
diff --git a/src/core/surface/server.c b/src/core/surface/server.c
index f29d47c17c..a9d8940631 100644
--- a/src/core/surface/server.c
+++ b/src/core/surface/server.c
@@ -51,7 +51,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
-typedef enum { PENDING_START, ALL_CALLS, CALL_LIST_COUNT } call_list;
+typedef enum { PENDING_START, CALL_LIST_COUNT } call_list;
 
 typedef struct listener {
   void *arg;
@@ -114,7 +114,6 @@ typedef struct channel_registered_method {
 
 struct channel_data {
   grpc_server *server;
-  size_t num_calls;
   grpc_connectivity_state connectivity_state;
   grpc_channel *channel;
   grpc_mdstr *path_key;
@@ -183,7 +182,11 @@ typedef enum {
 struct call_data {
   grpc_call *call;
 
+  /** protects state */
+  gpr_mu mu_state;
+  /** the current state of a call - see call_state */
   call_state state;
+
   grpc_mdstr *path;
   grpc_mdstr *host;
   gpr_timespec deadline;
@@ -204,9 +207,7 @@ struct call_data {
 
 typedef struct {
   grpc_channel **channels;
-  grpc_channel **disconnects;
   size_t num_channels;
-  size_t num_disconnects;
 } channel_broadcaster;
 
 #define SERVER_FROM_CALL_ELEM(elem) \
@@ -225,26 +226,15 @@ static void maybe_finish_shutdown(grpc_server *server);
 static void channel_broadcaster_init(grpc_server *s, channel_broadcaster *cb) {
   channel_data *c;
   size_t count = 0;
-  size_t dc_count = 0;
   for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) {
     count++;
-    if (c->num_calls == 0) {
-      dc_count++;
-    }
   }
   cb->num_channels = count;
-  cb->num_disconnects = dc_count;
   cb->channels = gpr_malloc(sizeof(*cb->channels) * cb->num_channels);
-  cb->disconnects = gpr_malloc(sizeof(*cb->channels) * cb->num_disconnects);
   count = 0;
-  dc_count = 0;
   for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) {
     cb->channels[count++] = c->channel;
     GRPC_CHANNEL_INTERNAL_REF(c->channel, "broadcast");
-    if (c->num_calls == 0) {
-      cb->disconnects[dc_count++] = c->channel;
-      GRPC_CHANNEL_INTERNAL_REF(c->channel, "broadcast-disconnect");
-    }
   }
 }
 
@@ -280,19 +270,14 @@ static void send_shutdown(grpc_channel *channel, int send_goaway,
 }
 
 static void channel_broadcaster_shutdown(channel_broadcaster *cb,
-                                         int send_goaway, int send_disconnect) {
+                                         int send_goaway, int force_disconnect) {
   size_t i;
 
   for (i = 0; i < cb->num_channels; i++) {
-    send_shutdown(cb->channels[i], 1, 0);
+    send_shutdown(cb->channels[i], send_goaway, force_disconnect);
     GRPC_CHANNEL_INTERNAL_UNREF(cb->channels[i], "broadcast");
   }
-  for (i = 0; i < cb->num_disconnects; i++) {
-    send_shutdown(cb->disconnects[i], 0, 1);
-    GRPC_CHANNEL_INTERNAL_UNREF(cb->channels[i], "broadcast-disconnect");
-  }
   gpr_free(cb->channels);
-  gpr_free(cb->disconnects);
 }
 
 /* call list */
@@ -422,19 +407,23 @@ static void destroy_channel(channel_data *chand) {
   grpc_iomgr_add_callback(&chand->finish_destroy_channel_closure);
 }
 
-static void finish_start_new_rpc_and_unlock(grpc_server *server,
-                                            grpc_call_element *elem,
-                                            call_data **pending_root,
-                                            requested_call_array *array) {
+static void finish_start_new_rpc(grpc_server *server, grpc_call_element *elem,
+                                 call_data **pending_root,
+                                 requested_call_array *array) {
   requested_call rc;
   call_data *calld = elem->call_data;
+  gpr_mu_lock(&server->mu_call);
   if (array->count == 0) {
+    gpr_mu_lock(&calld->mu_state);
     calld->state = PENDING;
+    gpr_mu_unlock(&calld->mu_state);
     call_list_join(pending_root, calld, PENDING_START);
     gpr_mu_unlock(&server->mu_call);
   } else {
     rc = array->calls[--array->count];
+    gpr_mu_lock(&calld->mu_state);
     calld->state = ACTIVATED;
+    gpr_mu_unlock(&calld->mu_state);
     gpr_mu_unlock(&server->mu_call);
     begin_call(server, calld, &rc);
   }
@@ -448,7 +437,6 @@ static void start_new_rpc(grpc_call_element *elem) {
   gpr_uint32 hash;
   channel_registered_method *rm;
 
-  gpr_mu_lock(&server->mu_call);
   if (chand->registered_methods && calld->path && calld->host) {
     /* TODO(ctiller): unify these two searches */
     /* check for an exact match with host */
@@ -459,9 +447,8 @@ static void start_new_rpc(grpc_call_element *elem) {
       if (!rm) break;
       if (rm->host != calld->host) continue;
       if (rm->method != calld->path) continue;
-      finish_start_new_rpc_and_unlock(server, elem,
-                                      &rm->server_registered_method->pending,
-                                      &rm->server_registered_method->requested);
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->pending,
+                           &rm->server_registered_method->requested);
       return;
     }
     /* check for a wildcard method definition (no host set) */
@@ -472,14 +459,13 @@ static void start_new_rpc(grpc_call_element *elem) {
       if (!rm) break;
       if (rm->host != NULL) continue;
       if (rm->method != calld->path) continue;
-      finish_start_new_rpc_and_unlock(server, elem,
-                                      &rm->server_registered_method->pending,
-                                      &rm->server_registered_method->requested);
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->pending,
+                           &rm->server_registered_method->requested);
       return;
     }
   }
-  finish_start_new_rpc_and_unlock(server, elem, &server->lists[PENDING_START],
-                                  &server->requested_calls);
+  finish_start_new_rpc(server, elem, &server->lists[PENDING_START],
+                       &server->requested_calls);
 }
 
 static void kill_zombie(void *elem, int success) {
@@ -501,15 +487,6 @@ static void maybe_finish_shutdown(grpc_server *server) {
     return;
   }
 
-  gpr_mu_lock(&server->mu_call);
-  if (server->lists[ALL_CALLS] != NULL) {
-    gpr_log(GPR_DEBUG,
-            "Waiting for all calls to finish before destroying server");
-    gpr_mu_unlock(&server->mu_call);
-    return;
-  }
-  gpr_mu_unlock(&server->mu_call);
-
   if (server->root_channel_data.next != &server->root_channel_data) {
     gpr_log(GPR_DEBUG,
             "Waiting for all channels to close before destroying server");
@@ -532,31 +509,19 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
   channel_data *chand = elem->channel_data;
   call_data *calld = elem->call_data;
   if (md->key == chand->path_key) {
-    calld->path = grpc_mdstr_ref(md->value);
+    calld->path = GRPC_MDSTR_REF(md->value);
     return NULL;
   } else if (md->key == chand->authority_key) {
-    calld->host = grpc_mdstr_ref(md->value);
+    calld->host = GRPC_MDSTR_REF(md->value);
     return NULL;
   }
   return md;
 }
 
-static int decrement_call_count(channel_data *chand) {
-  int disconnect = 0;
-  chand->num_calls--;
-  if (0 == chand->num_calls && chand->server->shutdown) {
-    disconnect = 1;
-  }
-  maybe_finish_shutdown(chand->server);
-  return disconnect;
-}
-
 static void server_on_recv(void *ptr, int success) {
   grpc_call_element *elem = ptr;
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
-  int remove_res;
-  int disconnect = 0;
 
   if (success && !calld->got_initial_metadata) {
     size_t i;
@@ -581,39 +546,33 @@ static void server_on_recv(void *ptr, int success) {
     case GRPC_STREAM_SEND_CLOSED:
       break;
     case GRPC_STREAM_RECV_CLOSED:
-      gpr_mu_lock(&chand->server->mu_call);
+      gpr_mu_lock(&calld->mu_state);
       if (calld->state == NOT_STARTED) {
         calld->state = ZOMBIED;
+        gpr_mu_unlock(&calld->mu_state);
         grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
         grpc_iomgr_add_callback(&calld->kill_zombie_closure);
+      } else {
+        gpr_mu_unlock(&calld->mu_state);
       }
-      gpr_mu_unlock(&chand->server->mu_call);
       break;
     case GRPC_STREAM_CLOSED:
-      gpr_mu_lock(&chand->server->mu_call);
+      gpr_mu_lock(&calld->mu_state);
       if (calld->state == NOT_STARTED) {
         calld->state = ZOMBIED;
+        gpr_mu_unlock(&calld->mu_state);
         grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
         grpc_iomgr_add_callback(&calld->kill_zombie_closure);
       } else if (calld->state == PENDING) {
-        call_list_remove(calld, PENDING_START);
         calld->state = ZOMBIED;
+        gpr_mu_unlock(&calld->mu_state);
+        gpr_mu_lock(&chand->server->mu_call);
+        call_list_remove(calld, PENDING_START);
+        gpr_mu_unlock(&chand->server->mu_call);
         grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
         grpc_iomgr_add_callback(&calld->kill_zombie_closure);
-      }
-      remove_res = call_list_remove(calld, ALL_CALLS);
-      gpr_mu_unlock(&chand->server->mu_call);
-      gpr_mu_lock(&chand->server->mu_global);
-      if (remove_res) {
-        disconnect = decrement_call_count(chand);
-        if (disconnect) {
-          GRPC_CHANNEL_INTERNAL_REF(chand->channel, "send-disconnect");
-        }
-      }
-      gpr_mu_unlock(&chand->server->mu_global);
-      if (disconnect) {
-        send_shutdown(chand->channel, 0, 1);
-        GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "send-disconnect");
+      } else {
+        gpr_mu_unlock(&calld->mu_state);
       }
       break;
   }
@@ -676,17 +635,10 @@ static void init_call_elem(grpc_call_element *elem,
   memset(calld, 0, sizeof(call_data));
   calld->deadline = gpr_inf_future;
   calld->call = grpc_call_from_top_element(elem);
+  gpr_mu_init(&calld->mu_state);
 
   grpc_iomgr_closure_init(&calld->server_on_recv, server_on_recv, elem);
 
-  gpr_mu_lock(&chand->server->mu_call);
-  call_list_join(&chand->server->lists[ALL_CALLS], calld, ALL_CALLS);
-  gpr_mu_unlock(&chand->server->mu_call);
-
-  gpr_mu_lock(&chand->server->mu_global);
-  chand->num_calls++;
-  gpr_mu_unlock(&chand->server->mu_global);
-
   server_ref(chand->server);
 
   if (initial_op) server_mutate_op(elem, initial_op);
@@ -695,27 +647,22 @@ static void init_call_elem(grpc_call_element *elem,
 static void destroy_call_elem(grpc_call_element *elem) {
   channel_data *chand = elem->channel_data;
   call_data *calld = elem->call_data;
-  int removed[CALL_LIST_COUNT];
-  size_t i;
 
-  gpr_mu_lock(&chand->server->mu_call);
-  for (i = 0; i < CALL_LIST_COUNT; i++) {
-    removed[i] = call_list_remove(elem->call_data, i);
-  }
-  gpr_mu_unlock(&chand->server->mu_call);
-  if (removed[ALL_CALLS]) {
-    gpr_mu_lock(&chand->server->mu_global);
-    decrement_call_count(chand);
-    gpr_mu_unlock(&chand->server->mu_global);
+  if (calld->state == PENDING) {
+    gpr_mu_lock(&chand->server->mu_call);
+    call_list_remove(elem->call_data, PENDING_START);
+    gpr_mu_unlock(&chand->server->mu_call);
   }
 
   if (calld->host) {
-    grpc_mdstr_unref(calld->host);
+    GRPC_MDSTR_UNREF(calld->host);
   }
   if (calld->path) {
-    grpc_mdstr_unref(calld->path);
+    GRPC_MDSTR_UNREF(calld->path);
   }
 
+  gpr_mu_destroy(&calld->mu_state);
+
   server_unref(chand->server);
 }
 
@@ -727,7 +674,6 @@ static void init_channel_elem(grpc_channel_element *elem, grpc_channel *master,
   GPR_ASSERT(is_first);
   GPR_ASSERT(!is_last);
   chand->server = NULL;
-  chand->num_calls = 0;
   chand->channel = NULL;
   chand->path_key = grpc_mdstr_from_string(metadata_context, ":path");
   chand->authority_key = grpc_mdstr_from_string(metadata_context, ":authority");
@@ -744,10 +690,10 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   if (chand->registered_methods) {
     for (i = 0; i < chand->registered_method_slots; i++) {
       if (chand->registered_methods[i].method) {
-        grpc_mdstr_unref(chand->registered_methods[i].method);
+        GRPC_MDSTR_UNREF(chand->registered_methods[i].method);
       }
       if (chand->registered_methods[i].host) {
-        grpc_mdstr_unref(chand->registered_methods[i].host);
+        GRPC_MDSTR_UNREF(chand->registered_methods[i].host);
       }
     }
     gpr_free(chand->registered_methods);
@@ -759,8 +705,8 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
     chand->next = chand->prev = chand;
     maybe_finish_shutdown(chand->server);
     gpr_mu_unlock(&chand->server->mu_global);
-    grpc_mdstr_unref(chand->path_key);
-    grpc_mdstr_unref(chand->authority_key);
+    GRPC_MDSTR_UNREF(chand->path_key);
+    GRPC_MDSTR_UNREF(chand->authority_key);
     server_unref(chand->server);
   }
 }
@@ -1049,47 +995,13 @@ void grpc_server_listener_destroy_done(void *s) {
 }
 
 void grpc_server_cancel_all_calls(grpc_server *server) {
-  call_data *calld;
-  grpc_call **calls;
-  size_t call_count;
-  size_t call_capacity;
-  int is_first = 1;
-  size_t i;
-
-  gpr_mu_lock(&server->mu_call);
-
-  GPR_ASSERT(server->shutdown);
-
-  if (!server->lists[ALL_CALLS]) {
-    gpr_mu_unlock(&server->mu_call);
-    return;
-  }
-
-  call_capacity = 8;
-  call_count = 0;
-  calls = gpr_malloc(sizeof(grpc_call *) * call_capacity);
-
-  for (calld = server->lists[ALL_CALLS];
-       calld != server->lists[ALL_CALLS] || is_first;
-       calld = calld->links[ALL_CALLS].next) {
-    if (call_count == call_capacity) {
-      call_capacity *= 2;
-      calls = gpr_realloc(calls, sizeof(grpc_call *) * call_capacity);
-    }
-    calls[call_count++] = calld->call;
-    GRPC_CALL_INTERNAL_REF(calld->call, "cancel_all");
-    is_first = 0;
-  }
-
-  gpr_mu_unlock(&server->mu_call);
+  channel_broadcaster broadcaster;
 
-  for (i = 0; i < call_count; i++) {
-    grpc_call_cancel_with_status(calls[i], GRPC_STATUS_UNAVAILABLE,
-                                 "Unavailable");
-    GRPC_CALL_INTERNAL_UNREF(calls[i], "cancel_all", 1);
-  }
+  gpr_mu_lock(&server->mu_global);
+  channel_broadcaster_init(server, &broadcaster);
+  gpr_mu_unlock(&server->mu_global);
 
-  gpr_free(calls);
+  channel_broadcaster_shutdown(&broadcaster, 0, 1);
 }
 
 void grpc_server_destroy(grpc_server *server) {
@@ -1145,10 +1057,12 @@ static grpc_call_error queue_call_request(grpc_server *server,
       requested_calls = &rc->data.registered.registered_method->requested;
       break;
   }
-  if (calld) {
+  if (calld != NULL) {
+    gpr_mu_unlock(&server->mu_call);
+    gpr_mu_lock(&calld->mu_state);
     GPR_ASSERT(calld->state == PENDING);
     calld->state = ACTIVATED;
-    gpr_mu_unlock(&server->mu_call);
+    gpr_mu_unlock(&calld->mu_state);
     begin_call(server, calld, rc);
     return GRPC_CALL_OK;
   } else {
diff --git a/src/core/transport/chttp2/hpack_parser.c b/src/core/transport/chttp2/hpack_parser.c
index c729e0f22f..f8bff42ed6 100644
--- a/src/core/transport/chttp2/hpack_parser.c
+++ b/src/core/transport/chttp2/hpack_parser.c
@@ -622,7 +622,7 @@ static const gpr_uint8 inverse_base64[256] = {
 static void on_hdr(grpc_chttp2_hpack_parser *p, grpc_mdelem *md,
                    int add_to_table) {
   if (add_to_table) {
-    grpc_mdelem_ref(md);
+    GRPC_MDELEM_REF(md);
     grpc_chttp2_hptbl_add(&p->table, md);
   }
   p->on_header(p->on_header_user_data, md);
@@ -711,7 +711,7 @@ static int parse_stream_dep0(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur,
 static int finish_indexed_field(grpc_chttp2_hpack_parser *p,
                                 const gpr_uint8 *cur, const gpr_uint8 *end) {
   grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
-  grpc_mdelem_ref(md);
+  GRPC_MDELEM_REF(md);
   on_hdr(p, md, 0);
   return parse_begin(p, cur, end);
 }
@@ -740,7 +740,7 @@ static int finish_lithdr_incidx(grpc_chttp2_hpack_parser *p,
                                 const gpr_uint8 *cur, const gpr_uint8 *end) {
   grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx,
-                                              grpc_mdstr_ref(md->key),
+                                              GRPC_MDSTR_REF(md->key),
                                               take_string(p, &p->value)),
          1);
   return parse_begin(p, cur, end);
@@ -793,7 +793,7 @@ static int finish_lithdr_notidx(grpc_chttp2_hpack_parser *p,
                                 const gpr_uint8 *cur, const gpr_uint8 *end) {
   grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx,
-                                              grpc_mdstr_ref(md->key),
+                                              GRPC_MDSTR_REF(md->key),
                                               take_string(p, &p->value)),
          0);
   return parse_begin(p, cur, end);
@@ -846,7 +846,7 @@ static int finish_lithdr_nvridx(grpc_chttp2_hpack_parser *p,
                                 const gpr_uint8 *cur, const gpr_uint8 *end) {
   grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx,
-                                              grpc_mdstr_ref(md->key),
+                                              GRPC_MDSTR_REF(md->key),
                                               take_string(p, &p->value)),
          0);
   return parse_begin(p, cur, end);
@@ -1336,7 +1336,7 @@ static void on_header_not_set(void *user_data, grpc_mdelem *md) {
           valuehex);
   gpr_free(keyhex);
   gpr_free(valuehex);
-  grpc_mdelem_unref(md);
+  GRPC_MDELEM_UNREF(md);
   abort();
 }
 
diff --git a/src/core/transport/chttp2/hpack_table.c b/src/core/transport/chttp2/hpack_table.c
index 372e71d68f..4fc154380e 100644
--- a/src/core/transport/chttp2/hpack_table.c
+++ b/src/core/transport/chttp2/hpack_table.c
@@ -122,10 +122,10 @@ void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl *tbl, grpc_mdctx *mdctx) {
 void grpc_chttp2_hptbl_destroy(grpc_chttp2_hptbl *tbl) {
   size_t i;
   for (i = 0; i < GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
-    grpc_mdelem_unref(tbl->static_ents[i]);
+    GRPC_MDELEM_UNREF(tbl->static_ents[i]);
   }
   for (i = 0; i < tbl->num_ents; i++) {
-    grpc_mdelem_unref(
+    GRPC_MDELEM_UNREF(
         tbl->ents[(tbl->first_ent + i) % GRPC_CHTTP2_MAX_TABLE_COUNT]);
   }
 }
@@ -155,7 +155,7 @@ static void evict1(grpc_chttp2_hptbl *tbl) {
                    GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
   tbl->first_ent = (tbl->first_ent + 1) % GRPC_CHTTP2_MAX_TABLE_COUNT;
   tbl->num_ents--;
-  grpc_mdelem_unref(first_ent);
+  GRPC_MDELEM_UNREF(first_ent);
 }
 
 void grpc_chttp2_hptbl_add(grpc_chttp2_hptbl *tbl, grpc_mdelem *md) {
diff --git a/src/core/transport/chttp2/incoming_metadata.c b/src/core/transport/chttp2/incoming_metadata.c
index 68e0912b9c..77162a6864 100644
--- a/src/core/transport/chttp2/incoming_metadata.c
+++ b/src/core/transport/chttp2/incoming_metadata.c
@@ -49,7 +49,7 @@ void grpc_chttp2_incoming_metadata_buffer_destroy(
     grpc_chttp2_incoming_metadata_buffer *buffer) {
   size_t i;
   for (i = 0; i < buffer->count; i++) {
-    grpc_mdelem_unref(buffer->elems[i].md);
+    GRPC_MDELEM_UNREF(buffer->elems[i].md);
   }
   gpr_free(buffer->elems);
 }
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index 7f98a5bd71..bdd4b432eb 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -173,6 +173,8 @@ typedef struct {
 
   /** have we seen a goaway */
   gpr_uint8 seen_goaway;
+  /** have we sent a goaway */
+  gpr_uint8 sent_goaway;
 
   /** is this transport a client? */
   gpr_uint8 is_client;
@@ -557,8 +559,10 @@ void grpc_chttp2_add_incoming_goaway(
 
 void grpc_chttp2_register_stream(grpc_chttp2_transport *t,
                                  grpc_chttp2_stream *s);
-void grpc_chttp2_unregister_stream(grpc_chttp2_transport *t,
-                                   grpc_chttp2_stream *s);
+/* returns 1 if this is the last stream, 0 otherwise */
+int grpc_chttp2_unregister_stream(grpc_chttp2_transport *t,
+                                  grpc_chttp2_stream *s) GRPC_MUST_USE_RESULT;
+int grpc_chttp2_has_streams(grpc_chttp2_transport *t);
 void grpc_chttp2_for_all_streams(
     grpc_chttp2_transport_global *transport_global, void *user_data,
     void (*cb)(grpc_chttp2_transport_global *transport_global, void *user_data,
diff --git a/src/core/transport/chttp2/parsing.c b/src/core/transport/chttp2/parsing.c
index 4664a0895c..130167f830 100644
--- a/src/core/transport/chttp2/parsing.c
+++ b/src/core/transport/chttp2/parsing.c
@@ -463,7 +463,7 @@ static grpc_chttp2_parse_error skip_parser(
   return GRPC_CHTTP2_PARSE_OK;
 }
 
-static void skip_header(void *tp, grpc_mdelem *md) { grpc_mdelem_unref(md); }
+static void skip_header(void *tp, grpc_mdelem *md) { GRPC_MDELEM_UNREF(md); }
 
 static int init_skip_frame_parser(
     grpc_chttp2_transport_parsing *transport_parsing, int is_header) {
@@ -600,7 +600,7 @@ static void on_header(void *tp, grpc_mdelem *md) {
     grpc_chttp2_incoming_metadata_buffer_set_deadline(
         &stream_parsing->incoming_metadata,
         gpr_time_add(gpr_now(), *cached_timeout));
-    grpc_mdelem_unref(md);
+    GRPC_MDELEM_UNREF(md);
   } else {
     grpc_chttp2_incoming_metadata_buffer_add(&stream_parsing->incoming_metadata,
                                              md);
diff --git a/src/core/transport/chttp2/stream_encoder.c b/src/core/transport/chttp2/stream_encoder.c
index cf78ac50cc..56ab82006a 100644
--- a/src/core/transport/chttp2/stream_encoder.c
+++ b/src/core/transport/chttp2/stream_encoder.c
@@ -247,19 +247,19 @@ static grpc_mdelem *add_elem(grpc_chttp2_hpack_compressor *c,
   } else if (c->entries_keys[HASH_FRAGMENT_3(key_hash)] == elem->key) {
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
   } else if (c->entries_keys[HASH_FRAGMENT_2(key_hash)] == NULL) {
-    c->entries_keys[HASH_FRAGMENT_2(key_hash)] = grpc_mdstr_ref(elem->key);
+    c->entries_keys[HASH_FRAGMENT_2(key_hash)] = GRPC_MDSTR_REF(elem->key);
     c->indices_keys[HASH_FRAGMENT_2(key_hash)] = new_index;
   } else if (c->entries_keys[HASH_FRAGMENT_3(key_hash)] == NULL) {
-    c->entries_keys[HASH_FRAGMENT_3(key_hash)] = grpc_mdstr_ref(elem->key);
+    c->entries_keys[HASH_FRAGMENT_3(key_hash)] = GRPC_MDSTR_REF(elem->key);
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
   } else if (c->indices_keys[HASH_FRAGMENT_2(key_hash)] <
              c->indices_keys[HASH_FRAGMENT_3(key_hash)]) {
-    grpc_mdstr_unref(c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
-    c->entries_keys[HASH_FRAGMENT_2(key_hash)] = grpc_mdstr_ref(elem->key);
+    GRPC_MDSTR_UNREF(c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
+    c->entries_keys[HASH_FRAGMENT_2(key_hash)] = GRPC_MDSTR_REF(elem->key);
     c->indices_keys[HASH_FRAGMENT_2(key_hash)] = new_index;
   } else {
-    grpc_mdstr_unref(c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
-    c->entries_keys[HASH_FRAGMENT_3(key_hash)] = grpc_mdstr_ref(elem->key);
+    GRPC_MDSTR_UNREF(c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
+    c->entries_keys[HASH_FRAGMENT_3(key_hash)] = GRPC_MDSTR_REF(elem->key);
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
   }
 
@@ -439,10 +439,10 @@ static void deadline_enc(grpc_chttp2_hpack_compressor *c, gpr_timespec deadline,
   grpc_mdelem *mdelem;
   grpc_chttp2_encode_timeout(gpr_time_sub(deadline, gpr_now()), timeout_str);
   mdelem = grpc_mdelem_from_metadata_strings(
-      c->mdctx, grpc_mdstr_ref(c->timeout_key_str),
+      c->mdctx, GRPC_MDSTR_REF(c->timeout_key_str),
       grpc_mdstr_from_string(c->mdctx, timeout_str));
   mdelem = hpack_enc(c, mdelem, st);
-  if (mdelem) grpc_mdelem_unref(mdelem);
+  if (mdelem) GRPC_MDELEM_UNREF(mdelem);
 }
 
 gpr_slice grpc_chttp2_data_frame_create_empty_close(gpr_uint32 id) {
@@ -461,10 +461,10 @@ void grpc_chttp2_hpack_compressor_init(grpc_chttp2_hpack_compressor *c,
 void grpc_chttp2_hpack_compressor_destroy(grpc_chttp2_hpack_compressor *c) {
   int i;
   for (i = 0; i < GRPC_CHTTP2_HPACKC_NUM_VALUES; i++) {
-    if (c->entries_keys[i]) grpc_mdstr_unref(c->entries_keys[i]);
-    if (c->entries_elems[i]) grpc_mdelem_unref(c->entries_elems[i]);
+    if (c->entries_keys[i]) GRPC_MDSTR_UNREF(c->entries_keys[i]);
+    if (c->entries_elems[i]) GRPC_MDELEM_UNREF(c->entries_elems[i]);
   }
-  grpc_mdstr_unref(c->timeout_key_str);
+  GRPC_MDSTR_UNREF(c->timeout_key_str);
 }
 
 gpr_uint32 grpc_chttp2_preencode(grpc_stream_op *inops, size_t *inops_count,
@@ -620,10 +620,10 @@ void grpc_chttp2_encode(grpc_stream_op *ops, size_t ops_count, int eof,
       op = &ops[unref_op];
       if (op->type != GRPC_OP_METADATA) continue;
       for (l = op->data.metadata.list.head; l; l = l->next) {
-        if (l->md) grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
+        if (l->md) GRPC_MDCTX_LOCKED_MDELEM_UNREF(mdctx, l->md);
       }
       for (l = op->data.metadata.garbage.head; l; l = l->next) {
-        grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
+        GRPC_MDCTX_LOCKED_MDELEM_UNREF(mdctx, l->md);
       }
     }
     grpc_mdctx_unlock(mdctx);
diff --git a/src/core/transport/chttp2/stream_lists.c b/src/core/transport/chttp2/stream_lists.c
index 85691b32d2..4fea058c19 100644
--- a/src/core/transport/chttp2/stream_lists.c
+++ b/src/core/transport/chttp2/stream_lists.c
@@ -354,9 +354,14 @@ void grpc_chttp2_register_stream(grpc_chttp2_transport *t,
   stream_list_add_tail(t, s, GRPC_CHTTP2_LIST_ALL_STREAMS);
 }
 
-void grpc_chttp2_unregister_stream(grpc_chttp2_transport *t,
+int grpc_chttp2_unregister_stream(grpc_chttp2_transport *t,
                                    grpc_chttp2_stream *s) {
-  stream_list_remove(t, s, GRPC_CHTTP2_LIST_ALL_STREAMS);
+  stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_ALL_STREAMS);
+  return stream_list_empty(t, GRPC_CHTTP2_LIST_ALL_STREAMS);
+}
+
+int grpc_chttp2_has_streams(grpc_chttp2_transport *t) {
+  return !stream_list_empty(t, GRPC_CHTTP2_LIST_ALL_STREAMS);
 }
 
 void grpc_chttp2_for_all_streams(
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 70df146239..322ff39820 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -139,7 +139,7 @@ static void destruct_transport(grpc_chttp2_transport *t) {
   grpc_chttp2_hpack_parser_destroy(&t->parsing.hpack_parser);
   grpc_chttp2_goaway_parser_destroy(&t->parsing.goaway_parser);
 
-  grpc_mdstr_unref(t->parsing.str_grpc_timeout);
+  GRPC_MDSTR_UNREF(t->parsing.str_grpc_timeout);
 
   for (i = 0; i < STREAM_LIST_COUNT; i++) {
     GPR_ASSERT(t->lists[i].head == NULL);
@@ -382,7 +382,9 @@ static void destroy_stream(grpc_transport *gt, grpc_stream *gs) {
   GPR_ASSERT(s->global.published_state == GRPC_STREAM_CLOSED ||
              s->global.id == 0);
   GPR_ASSERT(!s->global.in_stream_map);
-  grpc_chttp2_unregister_stream(t, s);
+  if (grpc_chttp2_unregister_stream(t, s) && t->global.sent_goaway) {
+    close_transport_locked(t);
+  }
   if (!t->parsing_active && s->global.id) {
     GPR_ASSERT(grpc_chttp2_stream_map_find(&t->parsing_stream_map,
                                            s->global.id) == NULL);
@@ -680,10 +682,14 @@ static void perform_transport_op(grpc_transport *gt, grpc_transport_op *op) {
   }
 
   if (op->send_goaway) {
+    t->global.sent_goaway = 1;
     grpc_chttp2_goaway_append(
         t->global.last_incoming_stream_id,
         grpc_chttp2_grpc_status_to_http2_error(op->goaway_status),
         gpr_slice_ref(*op->goaway_message), &t->global.qbuf);
+    if (!grpc_chttp2_has_streams(t)) {
+      close_transport_locked(t);
+    }
   }
 
   if (op->set_accept_stream != NULL) {
@@ -732,6 +738,9 @@ static void remove_stream(grpc_chttp2_transport *t, gpr_uint32 id) {
     t->parsing.incoming_stream = NULL;
     grpc_chttp2_parsing_become_skip_parser(&t->parsing);
   }
+  if (grpc_chttp2_unregister_stream(t, s) && t->global.sent_goaway) {
+    close_transport_locked(t);
+  }
 
   new_stream_count = grpc_chttp2_stream_map_size(&t->parsing_stream_map) +
                      grpc_chttp2_stream_map_size(&t->new_stream_map);
diff --git a/src/core/transport/metadata.c b/src/core/transport/metadata.c
index c80d67823f..9cbb0952d0 100644
--- a/src/core/transport/metadata.c
+++ b/src/core/transport/metadata.c
@@ -48,6 +48,20 @@
 #define INITIAL_STRTAB_CAPACITY 4
 #define INITIAL_MDTAB_CAPACITY 4
 
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+#define DEBUG_ARGS , const char *file, int line
+#define FWD_DEBUG_ARGS , file, line
+#define INTERNAL_STRING_REF(s) internal_string_ref((s), __FILE__, __LINE__)
+#define INTERNAL_STRING_UNREF(s) internal_string_unref((s), __FILE__, __LINE__)
+#define REF_MD_LOCKED(s) ref_md_locked((s), __FILE__, __LINE__)
+#else
+#define DEBUG_ARGS
+#define FWD_DEBUG_ARGS
+#define INTERNAL_STRING_REF(s) internal_string_ref((s))
+#define INTERNAL_STRING_UNREF(s) internal_string_unref((s))
+#define REF_MD_LOCKED(s) ref_md_locked((s))
+#endif
+
 typedef struct internal_string {
   /* must be byte compatible with grpc_mdstr */
   gpr_slice slice;
@@ -96,8 +110,8 @@ struct grpc_mdctx {
   size_t mdtab_capacity;
 };
 
-static void internal_string_ref(internal_string *s);
-static void internal_string_unref(internal_string *s);
+static void internal_string_ref(internal_string *s DEBUG_ARGS);
+static void internal_string_unref(internal_string *s DEBUG_ARGS);
 static void discard_metadata(grpc_mdctx *ctx);
 static void gc_mdtab(grpc_mdctx *ctx);
 static void metadata_context_destroy_locked(grpc_mdctx *ctx);
@@ -132,7 +146,15 @@ static void unlock(grpc_mdctx *ctx) {
   gpr_mu_unlock(&ctx->mu);
 }
 
-static void ref_md_locked(internal_metadata *md) {
+static void ref_md_locked(internal_metadata *md DEBUG_ARGS) {
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "ELM   REF:%p:%d->%d: '%s' = '%s'", md,
+          gpr_atm_no_barrier_load(&md->refcnt),
+          gpr_atm_no_barrier_load(&md->refcnt) + 1,
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
+#endif
   if (0 == gpr_atm_no_barrier_fetch_add(&md->refcnt, 1)) {
     md->context->mdtab_free--;
   }
@@ -173,8 +195,8 @@ static void discard_metadata(grpc_mdctx *ctx) {
     while (cur) {
       GPR_ASSERT(gpr_atm_acq_load(&cur->refcnt) == 0);
       next = cur->bucket_next;
-      internal_string_unref(cur->key);
-      internal_string_unref(cur->value);
+      INTERNAL_STRING_UNREF(cur->key);
+      INTERNAL_STRING_UNREF(cur->value);
       if (cur->user_data) {
         cur->destroy_user_data(cur->user_data);
       }
@@ -248,9 +270,19 @@ static void internal_destroy_string(internal_string *is) {
   gpr_free(is);
 }
 
-static void internal_string_ref(internal_string *s) { ++s->refs; }
+static void internal_string_ref(internal_string *s DEBUG_ARGS) {
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR   REF:%p:%d->%d: '%s'", s,
+          s->refs, s->refs + 1, grpc_mdstr_as_c_string((grpc_mdstr *)s));
+#endif
+  ++s->refs;
+}
 
-static void internal_string_unref(internal_string *s) {
+static void internal_string_unref(internal_string *s DEBUG_ARGS) {
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR UNREF:%p:%d->%d: '%s'", s,
+          s->refs, s->refs - 1, grpc_mdstr_as_c_string((grpc_mdstr *)s));
+#endif
   GPR_ASSERT(s->refs > 0);
   if (0 == --s->refs) {
     internal_destroy_string(s);
@@ -262,7 +294,7 @@ static void slice_ref(void *p) {
       (internal_string *)((char *)p - offsetof(internal_string, refcount));
   grpc_mdctx *ctx = is->context;
   lock(ctx);
-  internal_string_ref(is);
+  INTERNAL_STRING_REF(is);
   unlock(ctx);
 }
 
@@ -271,7 +303,7 @@ static void slice_unref(void *p) {
       (internal_string *)((char *)p - offsetof(internal_string, refcount));
   grpc_mdctx *ctx = is->context;
   lock(ctx);
-  internal_string_unref(is);
+  INTERNAL_STRING_UNREF(is);
   unlock(ctx);
 }
 
@@ -297,7 +329,7 @@ grpc_mdstr *grpc_mdstr_from_buffer(grpc_mdctx *ctx, const gpr_uint8 *buf,
   for (s = ctx->strtab[hash % ctx->strtab_capacity]; s; s = s->bucket_next) {
     if (s->hash == hash && GPR_SLICE_LENGTH(s->slice) == length &&
         0 == memcmp(buf, GPR_SLICE_START_PTR(s->slice), length)) {
-      internal_string_ref(s);
+      INTERNAL_STRING_REF(s);
       unlock(ctx);
       return (grpc_mdstr *)s;
     }
@@ -353,8 +385,8 @@ static void gc_mdtab(grpc_mdctx *ctx) {
     for (md = ctx->mdtab[i]; md; md = next) {
       next = md->bucket_next;
       if (gpr_atm_acq_load(&md->refcnt) == 0) {
-        internal_string_unref(md->key);
-        internal_string_unref(md->value);
+        INTERNAL_STRING_UNREF(md->key);
+        INTERNAL_STRING_UNREF(md->value);
         if (md->user_data) {
           md->destroy_user_data(md->user_data);
         }
@@ -418,9 +450,9 @@ grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdctx *ctx,
   /* search for an existing pair */
   for (md = ctx->mdtab[hash % ctx->mdtab_capacity]; md; md = md->bucket_next) {
     if (md->key == key && md->value == value) {
-      ref_md_locked(md);
-      internal_string_unref(key);
-      internal_string_unref(value);
+      REF_MD_LOCKED(md);
+      INTERNAL_STRING_UNREF(key);
+      INTERNAL_STRING_UNREF(value);
       unlock(ctx);
       return (grpc_mdelem *)md;
     }
@@ -435,6 +467,12 @@ grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdctx *ctx,
   md->user_data = NULL;
   md->destroy_user_data = NULL;
   md->bucket_next = ctx->mdtab[hash % ctx->mdtab_capacity];
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(GPR_DEBUG, "ELM   NEW:%p:%d: '%s' = '%s'", md,
+          gpr_atm_no_barrier_load(&md->refcnt),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
+#endif
   ctx->mdtab[hash % ctx->mdtab_capacity] = md;
   ctx->mdtab_count++;
 
@@ -469,8 +507,16 @@ grpc_mdelem *grpc_mdelem_from_string_and_buffer(grpc_mdctx *ctx,
       grpc_mdstr_from_buffer(ctx, value, value_length));
 }
 
-grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd) {
+grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) {
   internal_metadata *md = (internal_metadata *)gmd;
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "ELM   REF:%p:%d->%d: '%s' = '%s'", md,
+          gpr_atm_no_barrier_load(&md->refcnt),
+          gpr_atm_no_barrier_load(&md->refcnt) + 1,
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
+#endif
   /* we can assume the ref count is >= 1 as the application is calling
      this function - meaning that no adjustment to mdtab_free is necessary,
      simplifying the logic here to be just an atomic increment */
@@ -480,10 +526,18 @@ grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd) {
   return gmd;
 }
 
-void grpc_mdelem_unref(grpc_mdelem *gmd) {
+void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) {
   internal_metadata *md = (internal_metadata *)gmd;
   grpc_mdctx *ctx = md->context;
   lock(ctx);
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "ELM UNREF:%p:%d->%d: '%s' = '%s'", md,
+          gpr_atm_no_barrier_load(&md->refcnt),
+          gpr_atm_no_barrier_load(&md->refcnt) - 1,
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
+#endif
   assert(gpr_atm_no_barrier_load(&md->refcnt) >= 1);
   if (1 == gpr_atm_full_fetch_add(&md->refcnt, -1)) {
     ctx->mdtab_free++;
@@ -495,20 +549,20 @@ const char *grpc_mdstr_as_c_string(grpc_mdstr *s) {
   return (const char *)GPR_SLICE_START_PTR(s->slice);
 }
 
-grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs) {
+grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) {
   internal_string *s = (internal_string *)gs;
   grpc_mdctx *ctx = s->context;
   lock(ctx);
-  internal_string_ref(s);
+  internal_string_ref(s FWD_DEBUG_ARGS);
   unlock(ctx);
   return gs;
 }
 
-void grpc_mdstr_unref(grpc_mdstr *gs) {
+void grpc_mdstr_unref(grpc_mdstr *gs DEBUG_ARGS) {
   internal_string *s = (internal_string *)gs;
   grpc_mdctx *ctx = s->context;
   lock(ctx);
-  internal_string_unref(s);
+  internal_string_unref(s FWD_DEBUG_ARGS);
   unlock(ctx);
 }
 
@@ -558,10 +612,19 @@ gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) {
 
 void grpc_mdctx_lock(grpc_mdctx *ctx) { lock(ctx); }
 
-void grpc_mdctx_locked_mdelem_unref(grpc_mdctx *ctx, grpc_mdelem *gmd) {
+void grpc_mdctx_locked_mdelem_unref(grpc_mdctx *ctx,
+                                    grpc_mdelem *gmd DEBUG_ARGS) {
   internal_metadata *md = (internal_metadata *)gmd;
   grpc_mdctx *elem_ctx = md->context;
   GPR_ASSERT(ctx == elem_ctx);
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "ELM UNREF:%p:%d->%d: '%s' = '%s'", md,
+          gpr_atm_no_barrier_load(&md->refcnt),
+          gpr_atm_no_barrier_load(&md->refcnt) - 1,
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
+          grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
+#endif
   assert(gpr_atm_no_barrier_load(&md->refcnt) >= 1);
   if (1 == gpr_atm_full_fetch_add(&md->refcnt, -1)) {
     ctx->mdtab_free++;
diff --git a/src/core/transport/metadata.h b/src/core/transport/metadata.h
index 76e3f3c1f8..99b15322c3 100644
--- a/src/core/transport/metadata.h
+++ b/src/core/transport/metadata.h
@@ -127,11 +127,25 @@ void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *),
                                void *user_data);
 
 /* Reference counting */
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+#define GRPC_MDSTR_REF(s) grpc_mdstr_ref((s), __FILE__, __LINE__)
+#define GRPC_MDSTR_UNREF(s) grpc_mdstr_unref((s), __FILE__, __LINE__)
+#define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s), __FILE__, __LINE__)
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s), __FILE__, __LINE__)
+grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *s, const char *file, int line);
+void grpc_mdstr_unref(grpc_mdstr *s, const char *file, int line);
+grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *md, const char *file, int line);
+void grpc_mdelem_unref(grpc_mdelem *md, const char *file, int line);
+#else
+#define GRPC_MDSTR_REF(s) grpc_mdstr_ref((s))
+#define GRPC_MDSTR_UNREF(s) grpc_mdstr_unref((s))
+#define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s))
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s))
 grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *s);
 void grpc_mdstr_unref(grpc_mdstr *s);
-
 grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *md);
 void grpc_mdelem_unref(grpc_mdelem *md);
+#endif
 
 /* Recover a char* from a grpc_mdstr. The returned string is null terminated.
    Does not promise that the returned string has no embedded nulls however. */
@@ -147,8 +161,18 @@ int grpc_mdstr_is_bin_suffixed(grpc_mdstr *s);
 /* Lock the metadata context: it's only safe to call _locked_ functions against
    this context from the calling thread until grpc_mdctx_unlock is called */
 void grpc_mdctx_lock(grpc_mdctx *ctx);
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
+#define GRPC_MDCTX_LOCKED_MDELEM_UNREF(ctx, elem) \
+  grpc_mdctx_locked_mdelem_unref((ctx), (elem), __FILE__, __LINE__)
+/* Unref a metadata element */
+void grpc_mdctx_locked_mdelem_unref(grpc_mdctx *ctx, grpc_mdelem *elem,
+                                    const char *file, int line);
+#else
+#define GRPC_MDCTX_LOCKED_MDELEM_UNREF(ctx, elem) \
+  grpc_mdctx_locked_mdelem_unref((ctx), (elem))
 /* Unref a metadata element */
 void grpc_mdctx_locked_mdelem_unref(grpc_mdctx *ctx, grpc_mdelem *elem);
+#endif
 /* Unlock the metadata context */
 void grpc_mdctx_unlock(grpc_mdctx *ctx);
 
diff --git a/src/core/transport/stream_op.c b/src/core/transport/stream_op.c
index 81df5455f6..fdb50c6b71 100644
--- a/src/core/transport/stream_op.c
+++ b/src/core/transport/stream_op.c
@@ -211,10 +211,10 @@ void grpc_metadata_batch_init(grpc_metadata_batch *batch) {
 void grpc_metadata_batch_destroy(grpc_metadata_batch *batch) {
   grpc_linked_mdelem *l;
   for (l = batch->list.head; l; l = l->next) {
-    grpc_mdelem_unref(l->md);
+    GRPC_MDELEM_UNREF(l->md);
   }
   for (l = batch->garbage.head; l; l = l->next) {
-    grpc_mdelem_unref(l->md);
+    GRPC_MDELEM_UNREF(l->md);
   }
 }
 
@@ -315,7 +315,7 @@ void grpc_metadata_batch_filter(grpc_metadata_batch *batch,
       assert_valid_list(&batch->list);
       link_head(&batch->garbage, l);
     } else if (filt != orig) {
-      grpc_mdelem_unref(orig);
+      GRPC_MDELEM_UNREF(orig);
       l->md = filt;
     }
   }
diff --git a/src/core/transport/transport.c b/src/core/transport/transport.c
index fe565944ed..2689e3028a 100644
--- a/src/core/transport/transport.c
+++ b/src/core/transport/transport.c
@@ -85,6 +85,6 @@ void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
     op->cancel_with_status = status;
   }
   if (message) {
-    grpc_mdstr_unref(message);
+    GRPC_MDSTR_UNREF(message);
   }
 }
diff --git a/src/core/transport/transport.h b/src/core/transport/transport.h
index 579bcc943f..1429737721 100644
--- a/src/core/transport/transport.h
+++ b/src/core/transport/transport.h
@@ -91,7 +91,9 @@ typedef struct grpc_transport_op {
   grpc_connectivity_state *connectivity_state;
   /** should the transport be disconnected */
   int disconnect;
-  /** should we send a goaway? */
+  /** should we send a goaway?
+      after a goaway is sent, once there are no more active calls on
+      the transport, the transport should disconnect */
   int send_goaway;
   /** what should the goaway contain? */
   grpc_status_code goaway_status;
diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel.cc
index 5bc6f6fd91..da31d000b3 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel.cc
@@ -60,7 +60,7 @@ Channel::~Channel() { grpc_channel_destroy(c_channel_); }
 Call Channel::CreateCall(const RpcMethod& method, ClientContext* context,
                          CompletionQueue* cq) {
   auto c_call =
-      method.channel_tag()
+      method.channel_tag() && context->authority().empty()
           ? grpc_channel_create_registered_call(c_channel_, cq->cq(),
                                                 method.channel_tag(),
                                                 context->raw_deadline())
diff --git a/src/cpp/client/secure_credentials.cc b/src/cpp/client/secure_credentials.cc
index b5134b3140..4d200908fb 100644
--- a/src/cpp/client/secure_credentials.cc
+++ b/src/cpp/client/secure_credentials.cc
@@ -117,6 +117,13 @@ std::shared_ptr<Credentials> RefreshTokenCredentials(
       grpc_refresh_token_credentials_create(json_refresh_token.c_str()));
 }
 
+// Builds access token credentials.
+std::shared_ptr<Credentials> AccessTokenCredentials(
+    const grpc::string& access_token) {
+  return WrapCredentials(
+      grpc_access_token_credentials_create(access_token.c_str()));
+}
+
 // Builds IAM credentials.
 std::shared_ptr<Credentials> IAMCredentials(
     const grpc::string& authorization_token,
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
index 033c18490b..e6761d6244 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server.cc
@@ -207,10 +207,11 @@ Server::~Server() {
   delete sync_methods_;
 }
 
-bool Server::RegisterService(RpcService* service) {
+bool Server::RegisterService(const grpc::string *host, RpcService* service) {
   for (int i = 0; i < service->GetMethodCount(); ++i) {
     RpcServiceMethod* method = service->GetMethod(i);
-    void* tag = grpc_server_register_method(server_, method->name(), nullptr);
+    void* tag = grpc_server_register_method(
+        server_, method->name(), host ? host->c_str() : nullptr);
     if (!tag) {
       gpr_log(GPR_DEBUG, "Attempt to register %s multiple times",
               method->name());
@@ -222,14 +223,14 @@ bool Server::RegisterService(RpcService* service) {
   return true;
 }
 
-bool Server::RegisterAsyncService(AsynchronousService* service) {
+bool Server::RegisterAsyncService(const grpc::string *host, AsynchronousService* service) {
   GPR_ASSERT(service->server_ == nullptr &&
              "Can only register an asynchronous service against one server.");
   service->server_ = this;
   service->request_args_ = new void*[service->method_count_];
   for (size_t i = 0; i < service->method_count_; ++i) {
     void* tag = grpc_server_register_method(server_, service->method_names_[i],
-                                            nullptr);
+                                            host ? host->c_str() : nullptr);
     if (!tag) {
       gpr_log(GPR_DEBUG, "Attempt to register %s multiple times",
               service->method_names_[i]);
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 3ee1d54e76..86c78f05ff 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -51,11 +51,21 @@ std::unique_ptr<ServerCompletionQueue> ServerBuilder::AddCompletionQueue() {
 }
 
 void ServerBuilder::RegisterService(SynchronousService* service) {
-  services_.push_back(service->service());
+  services_.emplace_back(new NamedService<RpcService>(service->service()));
 }
 
 void ServerBuilder::RegisterAsyncService(AsynchronousService* service) {
-  async_services_.push_back(service);
+  async_services_.emplace_back(new NamedService<AsynchronousService>(service));
+}
+
+void ServerBuilder::RegisterService(
+    const grpc::string& addr, SynchronousService* service) {
+  services_.emplace_back(new NamedService<RpcService>(addr, service->service()));
+}
+
+void ServerBuilder::RegisterAsyncService(
+    const grpc::string& addr, AsynchronousService* service) {
+  async_services_.emplace_back(new NamedService<AsynchronousService>(addr, service));
 }
 
 void ServerBuilder::RegisterAsyncGenericService(AsyncGenericService* service) {
@@ -97,13 +107,13 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
   }
   for (auto service = services_.begin(); service != services_.end();
        service++) {
-    if (!server->RegisterService(*service)) {
+    if (!server->RegisterService((*service)->host.get(), (*service)->service)) {
       return nullptr;
     }
   }
   for (auto service = async_services_.begin();
        service != async_services_.end(); service++) {
-    if (!server->RegisterAsyncService(*service)) {
+    if (!server->RegisterAsyncService((*service)->host.get(), (*service)->service)) {
       return nullptr;
     }
   }
diff --git a/src/node/binding.gyp b/src/node/binding.gyp
index 83f72fabca..6ba233388a 100644
--- a/src/node/binding.gyp
+++ b/src/node/binding.gyp
@@ -10,20 +10,54 @@
         '-pthread',
         '-pedantic',
         '-g',
-        '-zdefs'
+        '-zdefs',
         '-Werror'
       ],
       'ldflags': [
         '-g'
       ],
-      'link_settings': {
-        'libraries': [
-          '-lpthread',
-          '-lgrpc',
-          '-lgpr'
-        ]
-      },
       "conditions": [
+        ['OS != "win"', {
+          'variables': {
+            'pkg_config_grpc': '<!(pkg-config --exists grpc >/dev/null 2>&1 && echo true || echo false)'
+          },
+          'conditions': [
+            ['pkg_config_grpc == "true"', {
+              'link_settings': {
+                'libraries': [
+                  '<!@(pkg-config --libs-only-l --static grpc)'
+                ]
+              },
+              'cflags': [
+                '<!@(pkg-config --cflags grpc)'
+              ],
+              'libraries': [
+                '<!@(pkg-config --libs-only-L --static grpc)'
+              ],
+              'ldflags': [
+                '<!@(pkg-config --libs-only-other --static grpc)'
+              ]
+              }, {
+                'link_settings': {
+                  'libraries': [
+                    '-lpthread',
+                    '-lgrpc',
+                    '-lgpr'
+                  ],
+                },
+                'conditions':[
+                  ['OS != "mac"', {
+                    'link_settings': {
+                      'libraries': [
+                        '-lrt'
+                      ]
+                    }
+                  }]
+                ]
+              }
+           ]
+          ]
+        }],
         ['OS == "mac"', {
           'xcode_settings': {
             'MACOSX_DEPLOYMENT_TARGET': '10.9',
@@ -32,13 +66,6 @@
               '-stdlib=libc++'
             ]
           }
-        }],
-        ['OS != "mac"', {
-          'link_settings': {
-            'libraries': [
-              '-lrt'
-            ]
-          }
         }]
       ],
       "target_name": "grpc",
diff --git a/src/node/package.json b/src/node/package.json
index 7d4a493af4..6b545705e1 100644
--- a/src/node/package.json
+++ b/src/node/package.json
@@ -27,7 +27,7 @@
     "bindings": "^1.2.0",
     "lodash": "^3.9.3",
     "nan": "^1.5.0",
-    "protobufjs": "dcodeIO/ProtoBuf.js"
+    "protobufjs": "^4.0.0"
   },
   "devDependencies": {
     "async": "^0.9.0",
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index 36f4c0aa5e..af4326332f 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -60,7 +60,7 @@
 }
 
 - (instancetype)initWithHost:(NSString *)host {
-  if (![host containsString:@"://"]) {
+  if (![host rangeOfString:@"://"].length) {
     // No scheme provided; assume https.
     host = [@"https://" stringByAppendingString:host];
   }
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index 026868db12..2aa837f764 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -1,6 +1,7 @@
 source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
+pod 'Protobuf', :path => "../../../third_party/protobuf"
 pod 'gRPC', :path => "../../.."
 pod 'RemoteTest', :path => "../generated_libraries/RemoteTestClient"
 pod 'RouteGuide', :path => "../generated_libraries/RouteGuideClient"
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 6dd0234489..7972272e2d 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -54,44 +54,55 @@ LIB_DIRS = [
   LIBDIR
 ]
 
-# Check to see if GRPC_ROOT is defined or available
-grpc_root = ENV['GRPC_ROOT']
-if grpc_root.nil?
-  r = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
-  grpc_root = r if File.exist?(File.join(r, 'include/grpc/grpc.h'))
-end
-
-# When grpc_root is available attempt to build the grpc core.
-unless grpc_root.nil?
-  grpc_config = ENV['GRPC_CONFIG'] || 'opt'
-  if ENV.key?('GRPC_LIB_DIR')
-    grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
-  else
-    grpc_lib_dir = File.join(File.join(grpc_root, 'libs'), grpc_config)
-  end
-  unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a'))
-    system("make -C #{grpc_root} static_c CONFIG=#{grpc_config}")
+def check_grpc_root
+  grpc_root = ENV['GRPC_ROOT']
+  if grpc_root.nil?
+    r = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
+    grpc_root = r if File.exist?(File.join(r, 'include/grpc/grpc.h'))
   end
-  HEADER_DIRS.unshift File.join(grpc_root, 'include')
-  LIB_DIRS.unshift grpc_lib_dir
+  grpc_root
 end
 
-def crash(msg)
-  print(" extconf failure: #{msg}\n")
-  exit 1
-end
+grpc_pkg_config = system('pkg-config --exists grpc')
+
+if grpc_pkg_config
+  $CFLAGS << ' ' + `pkg-config --static --cflags grpc`.strip + ' '
+  $LDFLAGS << ' ' + `pkg-config --static --libs grpc`.strip + ' '
+else
+  dir_config('grpc', HEADER_DIRS, LIB_DIRS)
+  fail 'libdl not found' unless have_library('dl', 'dlopen')
+  fail 'zlib not found' unless have_library('z', 'inflate')
+  begin
+    fail 'Fail' unless have_library('gpr', 'gpr_now')
+    fail 'Fail' unless have_library('grpc', 'grpc_channel_destroy')
+  rescue
+    # Check to see if GRPC_ROOT is defined or available
+    grpc_root = check_grpc_root
 
-dir_config('grpc', HEADER_DIRS, LIB_DIRS)
+    # Stop if there is still no grpc_root
+    exit 1 if grpc_root.nil?
 
-$CFLAGS << ' -Wno-implicit-function-declaration '
-$CFLAGS << ' -Wno-pointer-sign '
-$CFLAGS << ' -Wno-return-type '
+    grpc_config = ENV['GRPC_CONFIG'] || 'opt'
+    if ENV.key?('GRPC_LIB_DIR')
+      grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
+    else
+      grpc_lib_dir = File.join(File.join(grpc_root, 'libs'), grpc_config)
+    end
+    unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a'))
+      print "Building internal gRPC\n"
+      system("make -C #{grpc_root} static_c CONFIG=#{grpc_config}")
+    end
+    $CFLAGS << ' -I' + File.join(grpc_root, 'include')
+    $LDFLAGS << ' -L' + grpc_lib_dir
+    raise 'gpr not found' unless have_library('gpr', 'gpr_now')
+    raise 'grpc not found' unless have_library('grpc', 'grpc_channel_destroy')
+  end
+end
+
+$CFLAGS << ' -std=c99 '
 $CFLAGS << ' -Wall '
+$CFLAGS << ' -Wextra '
 $CFLAGS << ' -pedantic '
+$CFLAGS << ' -Werror '
 
-$LDFLAGS << ' -lgrpc -lgpr -lz -ldl'
-
-crash('need grpc lib') unless have_library('grpc', 'grpc_channel_destroy')
-have_library('grpc', 'grpc_channel_destroy')
-crash('need gpr lib') unless have_library('gpr', 'gpr_now')
 create_makefile('grpc/grpc')
diff --git a/src/ruby/ext/grpc/rb_server.c b/src/ruby/ext/grpc/rb_server.c
index 9c0d24bf8f..bed3b26850 100644
--- a/src/ruby/ext/grpc/rb_server.c
+++ b/src/ruby/ext/grpc/rb_server.c
@@ -68,8 +68,12 @@ static void grpc_rb_server_free(void *p) {
 
   /* Deletes the wrapped object if the mark object is Qnil, which indicates
      that no other object is the actual owner. */
+  /* grpc_server_shutdown does not exist. Change this to something that does
+     or delete it */
   if (svr->wrapped != NULL && svr->mark == Qnil) {
-    grpc_server_shutdown(svr->wrapped);
+    // grpc_server_shutdown(svr->wrapped);
+    // Aborting to indicate a bug
+    abort();
     grpc_server_destroy(svr->wrapped);
   }
 
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 52eb593cc8..84822ab80f 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -229,6 +229,7 @@ endif
 endif
 INSTALL = install
 RM = rm -f
+PKG_CONFIG = pkg-config
 
 ifndef VALID_CONFIG_$(CONFIG)
 $(error Invalid CONFIG value '$(CONFIG)')
@@ -345,7 +346,7 @@ HOST_LDLIBS = $(LDLIBS)
 # These are automatically computed variables.
 # There shouldn't be any need to change anything from now on.
 
-HAS_PKG_CONFIG = $(shell command -v pkg-config >/dev/null 2>&1 && echo true || echo false)
+HAS_PKG_CONFIG = $(shell command -v $(PKG_CONFIG) >/dev/null 2>&1 && echo true || echo false)
 
 PC_TEMPLATE = prefix=$(prefix)\n\
 exec_prefix=${'\$${prefix}'}\n\
@@ -357,7 +358,7 @@ Description: $(PC_DESCRIPTION)\n\
 Version: $(VERSION)\n\
 Cflags: -I${'\$${includedir}'} $(PC_CFLAGS)\n\
 Requires.private: $(PC_REQUIRES_PRIVATE)\n\
-Libs: -L${'\$${libdir}'}\n\
+Libs: -L${'\$${libdir}'} $(PC_LIB)\n\
 Libs.private: $(PC_LIBS_PRIVATE)
 
 # gpr .pc file
@@ -366,7 +367,8 @@ PC_DESCRIPTION = gRPC Portable Runtime
 PC_CFLAGS = -pthread
 PC_REQUIRES_PRIVATE =
 PC_LIBS_PRIVATE = -lpthread
-ifeq ($(SYSTEM),Darwin)
+PC_LIB = -lgpr
+ifneq ($(SYSTEM),Darwin)
 PC_LIBS_PRIVATE += -lrt
 endif
 GPR_PC_FILE := $(PC_TEMPLATE)
@@ -396,11 +398,10 @@ OPENSSL_REQUIRES_DL = true
 endif
 
 ifeq ($(HAS_PKG_CONFIG),true)
-OPENSSL_ALPN_CHECK_CMD = pkg-config --atleast-version=1.0.2 openssl
-OPENSSL_NPN_CHECK_CMD = pkg-config --alteast-version=1.0.1 openssl
-ZLIB_CHECK_CMD = pkg-config --exists zlib
-PERFTOOLS_CHECK_CMD = pkg-config --exists profiler
-PROTOBUF_CHECK_CMD = pkg-config --atleast-version=3.0.0-alpha-3 protobuf
+OPENSSL_ALPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.2 openssl
+OPENSSL_NPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.1 openssl
+ZLIB_CHECK_CMD = $(PKG_CONFIG) --exists zlib
+PROTOBUF_CHECK_CMD = $(PKG_CONFIG) --atleast-version=3.0.0-alpha-3 protobuf
 else # HAS_PKG_CONFIG
 
 ifeq ($(SYSTEM),MINGW32)
@@ -412,7 +413,6 @@ endif
 OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
 OPENSSL_NPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
 ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
-PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
 
 ifeq ($(OPENSSL_REQUIRES_DL),true)
@@ -422,6 +422,8 @@ endif
 
 endif # HAS_PKG_CONFIG
 
+PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
+
 PROTOC_CHECK_CMD = which protoc > /dev/null
 PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
 DTRACE_CHECK_CMD = which dtrace > /dev/null
@@ -509,8 +511,8 @@ DEP_MISSING += zlib
 endif
 else
 ifeq ($(HAS_PKG_CONFIG),true)
-CPPFLAGS += $(shell pkg-config --cflags zlib)
-LDFLAGS += $(shell pkg-config --libs-only-L zlib)
+CPPFLAGS += $(shell $(PKG_CONFIG) --cflags zlib)
+LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L zlib)
 PC_REQUIRES_GRPC += zlib
 else
 PC_LIBS_GRPC += -lz
@@ -526,11 +528,11 @@ ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),true)
 ifeq ($(HAS_PKG_CONFIG),true)
 OPENSSL_PKG_CONFIG = true
 PC_REQUIRES_SECURE = openssl
-CPPFLAGS := $(shell pkg-config --cflags openssl) $(CPPFLAGS)
-LDFLAGS_OPENSSL_PKG_CONFIG = $(shell pkg-config --libs-only-L openssl)
+CPPFLAGS := $(shell $(PKG_CONFIG) --cflags openssl) $(CPPFLAGS)
+LDFLAGS_OPENSSL_PKG_CONFIG = $(shell $(PKG_CONFIG) --libs-only-L openssl)
 ifeq ($(SYSTEM),Linux)
 ifneq ($(LDFLAGS_OPENSSL_PKG_CONFIG),)
-LDFLAGS_OPENSSL_PKG_CONFIG += $(shell pkg-config --libs-only-L openssl | sed s/L/Wl,-rpath,/)
+LDFLAGS_OPENSSL_PKG_CONFIG += $(shell $(PKG_CONFIG) --libs-only-L openssl | sed s/L/Wl,-rpath,/)
 endif
 endif
 LDFLAGS := $(LDFLAGS_OPENSSL_PKG_CONFIG) $(LDFLAGS)
@@ -567,7 +569,7 @@ endif
 endif
 
 ifeq ($(OPENSSL_PKG_CONFIG),true)
-LDLIBS_SECURE += $(shell pkg-config --libs-only-l openssl)
+LDLIBS_SECURE += $(shell $(PKG_CONFIG) --libs-only-l openssl)
 else
 LDLIBS_SECURE += $(addprefix -l, $(LIBS_SECURE))
 endif
@@ -578,6 +580,7 @@ PC_DESCRIPTION = high performance general RPC framework
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = $(PC_REQUIRES_GRPC) $(PC_REQUIRES_SECURE)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPC) $(PC_LIBS_SECURE)
+PC_LIB = -lgrpc
 GRPC_PC_FILE := $(PC_TEMPLATE)
 
 # gprc_unsecure .pc file
@@ -586,6 +589,7 @@ PC_DESCRIPTION = high performance general RPC framework without SSL
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = $(PC_REQUIRES_GRPC)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPC)
+PC_LIB = -lgrpc
 GRPC_UNSECURE_PC_FILE := $(PC_TEMPLATE)
 
 PROTOBUF_PKG_CONFIG = false
@@ -597,11 +601,11 @@ ifeq ($(HAS_SYSTEM_PROTOBUF),true)
 ifeq ($(HAS_PKG_CONFIG),true)
 PROTOBUF_PKG_CONFIG = true
 PC_REQUIRES_GRPCXX = protobuf
-CPPFLAGS := $(shell pkg-config --cflags protobuf) $(CPPFLAGS)
-LDFLAGS_PROTOBUF_PKG_CONFIG = $(shell pkg-config --libs-only-L protobuf)
+CPPFLAGS := $(shell $(PKG_CONFIG) --cflags protobuf) $(CPPFLAGS)
+LDFLAGS_PROTOBUF_PKG_CONFIG = $(shell $(PKG_CONFIG) --libs-only-L protobuf)
 ifeq ($(SYSTEM),Linux)
 ifneq ($(LDFLAGS_PROTOBUF_PKG_CONFIG),)
-LDFLAGS_PROTOBUF_PKG_CONFIG += $(shell pkg-config --libs-only-L protobuf | sed s/L/Wl,-rpath,/)
+LDFLAGS_PROTOBUF_PKG_CONFIG += $(shell $(PKG_CONFIG) --libs-only-L protobuf | sed s/L/Wl,-rpath,/)
 endif
 endif
 else
@@ -624,7 +628,7 @@ LIBS_PROTOC = protoc protobuf
 HOST_LDLIBS_PROTOC += $(addprefix -l, $(LIBS_PROTOC))
 
 ifeq ($(PROTOBUF_PKG_CONFIG),true)
-LDLIBS_PROTOBUF += $(shell pkg-config --libs-only-l protobuf)
+LDLIBS_PROTOBUF += $(shell $(PKG_CONFIG) --libs-only-l protobuf)
 else
 LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
 endif
@@ -635,6 +639,7 @@ PC_DESCRIPTION = C++ wrapper for gRPC
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = grpc $(PC_REQUIRES_GRPCXX)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPCXX)
+PC_LIB = -lgrpc++
 GRPCXX_PC_FILE := $(PC_TEMPLATE)
 
 # grpc++_unsecure .pc file
@@ -643,6 +648,7 @@ PC_DESCRIPTION = C++ wrapper for gRPC without SSL
 PC_CFLAGS =
 PC_REQUIRES_PRIVATE = grpc_unsecure $(PC_REQUIRES_GRPCXX)
 PC_LIBS_PRIVATE = $(PC_LIBS_GRPCXX)
+PC_LIB = -lgrpc++
 GRPCXX_UNSECURE_PC_FILE := $(PC_TEMPLATE)
 
 ifeq ($(MAKECMDGOALS),clean)
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index 4253be6b07..e8bb730849 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -331,6 +331,27 @@ static void test_iam_creds(void) {
                                         check_iam_metadata, creds);
 }
 
+static void check_access_token_metadata(void *user_data,
+                                        grpc_credentials_md *md_elems,
+                                        size_t num_md,
+                                        grpc_credentials_status status) {
+  grpc_credentials *c = (grpc_credentials *)user_data;
+  expected_md emd[] = {{GRPC_AUTHORIZATION_METADATA_KEY, "Bearer blah"}};
+  GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(num_md == 1);
+  check_metadata(emd, md_elems, num_md);
+  grpc_credentials_unref(c);
+}
+
+static void test_access_token_creds(void) {
+  grpc_credentials *creds = grpc_access_token_credentials_create("blah");
+  GPR_ASSERT(grpc_credentials_has_request_metadata(creds));
+  GPR_ASSERT(grpc_credentials_has_request_metadata_only(creds));
+  GPR_ASSERT(strcmp(creds->type, GRPC_CREDENTIALS_TYPE_OAUTH2) == 0);
+  grpc_credentials_get_request_metadata(creds, NULL, test_service_url,
+                                        check_access_token_metadata, creds);
+}
+
 static void check_ssl_oauth2_composite_metadata(
     void *user_data, grpc_credentials_md *md_elems, size_t num_md,
     grpc_credentials_status status) {
@@ -863,6 +884,7 @@ int main(int argc, char **argv) {
   test_oauth2_token_fetcher_creds_parsing_missing_token_type();
   test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime();
   test_iam_creds();
+  test_access_token_creds();
   test_ssl_oauth2_composite_creds();
   test_ssl_oauth2_iam_composite_creds();
   test_compute_engine_creds_success();
diff --git a/test/core/security/jwt_verifier_test.c b/test/core/security/jwt_verifier_test.c
new file mode 100644
index 0000000000..46b96d9ecb
--- /dev/null
+++ b/test/core/security/jwt_verifier_test.c
@@ -0,0 +1,565 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/security/jwt_verifier.h"
+
+#include <string.h>
+
+#include "src/core/httpcli/httpcli.h"
+#include "src/core/security/base64.h"
+#include "src/core/security/json_token.h"
+#include "test/core/util/test_config.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/string_util.h>
+
+/* This JSON key was generated with the GCE console and revoked immediately.
+   The identifiers have been changed as well.
+   Maximum size for a string literal is 509 chars in C89, yay!  */
+static const char json_key_str_part1[] =
+    "{ \"private_key\": \"-----BEGIN PRIVATE KEY-----"
+    "\\nMIICeAIBADANBgkqhkiG9w0BAQEFAASCAmIwggJeAgEAAoGBAOEvJsnoHnyHkXcp\\n7mJE"
+    "qg"
+    "WGjiw71NfXByguekSKho65FxaGbsnSM9SMQAqVk7Q2rG+I0OpsT0LrWQtZ\\nyjSeg/"
+    "rWBQvS4hle4LfijkP3J5BG+"
+    "IXDMP8RfziNRQsenAXDNPkY4kJCvKux2xdD\\nOnVF6N7dL3nTYZg+"
+    "uQrNsMTz9UxVAgMBAAECgYEAzbLewe1xe9vy+2GoSsfib+28\\nDZgSE6Bu/"
+    "zuFoPrRc6qL9p2SsnV7txrunTyJkkOnPLND9ABAXybRTlcVKP/sGgza\\n/"
+    "8HpCqFYM9V8f34SBWfD4fRFT+n/"
+    "73cfRUtGXdXpseva2lh8RilIQfPhNZAncenU\\ngqXjDvpkypEusgXAykECQQD+";
+static const char json_key_str_part2[] =
+    "53XxNVnxBHsYb+AYEfklR96yVi8HywjVHP34+OQZ\\nCslxoHQM8s+"
+    "dBnjfScLu22JqkPv04xyxmt0QAKm9+vTdAkEA4ib7YvEAn2jXzcCI\\nEkoy2L/"
+    "XydR1GCHoacdfdAwiL2npOdnbvi4ZmdYRPY1LSTO058tQHKVXV7NLeCa3\\nAARh2QJBAMKeDA"
+    "G"
+    "W303SQv2cZTdbeaLKJbB5drz3eo3j7dDKjrTD9JupixFbzcGw\\n8FZi5c8idxiwC36kbAL6Hz"
+    "A"
+    "ZoX+ofI0CQE6KCzPJTtYNqyShgKAZdJ8hwOcvCZtf\\n6z8RJm0+"
+    "6YBd38lfh5j8mZd7aHFf6I17j5AQY7oPEc47TjJj/"
+    "5nZ68ECQQDvYuI3\\nLyK5fS8g0SYbmPOL9TlcHDOqwG0mrX9qpg5DC2fniXNSrrZ64GTDKdzZ"
+    "Y"
+    "Ap6LI9W\\nIqv4vr6y38N79TTC\\n-----END PRIVATE KEY-----\\n\", ";
+static const char json_key_str_part3_for_google_email_issuer[] =
+    "\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
+    "\"client_email\": "
+    "\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
+    "com\", \"client_id\": "
+    "\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
+    "com\", \"type\": \"service_account\" }";
+/* Trick our JWT library into issuing a JWT with iss=accounts.google.com. */
+static const char json_key_str_part3_for_url_issuer[] =
+    "\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
+    "\"client_email\": \"accounts.google.com\", "
+    "\"client_id\": "
+    "\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
+    "com\", \"type\": \"service_account\" }";
+static const char json_key_str_part3_for_custom_email_issuer[] =
+    "\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
+    "\"client_email\": "
+    "\"foo@bar.com\", \"client_id\": "
+    "\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
+    "com\", \"type\": \"service_account\" }";
+
+static grpc_jwt_verifier_email_domain_key_url_mapping custom_mapping = {
+  "bar.com", "keys.bar.com/jwk"
+};
+
+static const char expected_user_data[] = "user data";
+
+static const char good_jwk_set[] =
+    "{"
+    " \"keys\": ["
+    "  {"
+    "   \"kty\": \"RSA\","
+    "   \"alg\": \"RS256\","
+    "   \"use\": \"sig\","
+    "   \"kid\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\","
+    "   \"n\": "
+    "\"4S8myegefIeRdynuYkSqBYaOLDvU19cHKC56RIqGjrkXFoZuydIz1IxACpWTtDasb4jQ6mxP"
+    "QutZC1nKNJ6D-tYFC9LiGV7gt-KOQ_cnkEb4hcMw_xF_OI1FCx6cBcM0-"
+    "RjiQkK8q7HbF0M6dUXo3t0vedNhmD65Cs2wxPP1TFU=\","
+    "   \"e\": \"AQAB\""
+    "  }"
+    " ]"
+    "}";
+
+static gpr_timespec expected_lifetime = {3600, 0};
+
+static const char good_google_email_keys_part1[] =
+    "{\"e6b5137873db8d2ef81e06a47289e6434ec8a165\": \"-----BEGIN "
+    "CERTIFICATE-----"
+    "\\nMIICATCCAWoCCQDEywLhxvHjnDANBgkqhkiG9w0BAQsFADBFMQswCQYDVQQGEwJB\\nVTET"
+    "MBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0\\ncyBQdHkgTHR"
+    "kMB4XDTE1MDYyOTA4Mzk1MFoXDTI1MDYyNjA4Mzk1MFowRTELMAkG\\nA1UEBhMCQVUxEzARBg"
+    "NVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0\\nIFdpZGdpdHMgUHR5IEx0ZDCBn"
+    "zANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA4S8m\\nyegefIeRdynuYkSqBYaOLDvU19cHKC56"
+    "RIqGjrkXFoZuydIz1IxACpWTtDasb4jQ\\n6mxPQutZC1nKNJ6D+tYFC9LiGV7gt+KOQ/";
+
+static const char good_google_email_keys_part2[] =
+    "cnkEb4hcMw/xF/OI1FCx6cBcM0+"
+    "Rji\\nQkK8q7HbF0M6dUXo3t0vedNhmD65Cs2wxPP1TFUCAwEAATANBgkqhkiG9w0BAQsF\\nA"
+    "AOBgQBfu69FkPmBknbKNFgurPz78kbs3VNN+k/"
+    "PUgO5DHKskJmgK2TbtvX2VMpx\\nkftmHGzgzMzUlOtigCaGMgHWjfqjpP9uuDbahXrZBJzB8c"
+    "Oq7MrQF8r17qVvo3Ue\\nPjTKQMAsU8uxTEMmeuz9L6yExs0rfd6bPOrQkAoVfFfiYB3/"
+    "pA==\\n-----END CERTIFICATE-----\\n\"}";
+
+static const char expected_audience[] = "https://foo.com";
+
+static const char good_openid_config[] =
+    "{"
+    " \"issuer\": \"https://accounts.google.com\","
+    " \"authorization_endpoint\": "
+    "\"https://accounts.google.com/o/oauth2/v2/auth\","
+    " \"token_endpoint\": \"https://www.googleapis.com/oauth2/v4/token\","
+    " \"userinfo_endpoint\": \"https://www.googleapis.com/oauth2/v3/userinfo\","
+    " \"revocation_endpoint\": \"https://accounts.google.com/o/oauth2/revoke\","
+    " \"jwks_uri\": \"https://www.googleapis.com/oauth2/v3/certs\""
+    "}";
+
+static const char expired_claims[] =
+    "{ \"aud\": \"https://foo.com\","
+    "  \"iss\": \"blah.foo.com\","
+    "  \"sub\": \"juju@blah.foo.com\","
+    "  \"jti\": \"jwtuniqueid\","
+    "  \"iat\": 100,"  /* Way back in the past... */
+    "  \"exp\": 120,"
+    "  \"nbf\": 60,"
+    "  \"foo\": \"bar\"}";
+
+static const char claims_without_time_constraint[] =
+    "{ \"aud\": \"https://foo.com\","
+    "  \"iss\": \"blah.foo.com\","
+    "  \"sub\": \"juju@blah.foo.com\","
+    "  \"jti\": \"jwtuniqueid\","
+    "  \"foo\": \"bar\"}";
+
+static const char invalid_claims[] =
+    "{ \"aud\": \"https://foo.com\","
+    "  \"iss\": 46," /* Issuer cannot be a number. */
+    "  \"sub\": \"juju@blah.foo.com\","
+    "  \"jti\": \"jwtuniqueid\","
+    "  \"foo\": \"bar\"}";
+
+typedef struct {
+  grpc_jwt_verifier_status expected_status;
+  const char *expected_issuer;
+  const char *expected_subject;
+} verifier_test_config;
+
+static void test_claims_success(void) {
+  grpc_jwt_claims *claims;
+  gpr_slice s = gpr_slice_from_copied_string(claims_without_time_constraint);
+  grpc_json *json = grpc_json_parse_string_with_len(
+      (char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s));
+  GPR_ASSERT(json != NULL);
+  claims = grpc_jwt_claims_from_json(json, s);
+  GPR_ASSERT(claims != NULL);
+  GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_issuer(claims), "blah.foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_subject(claims), "juju@blah.foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_id(claims), "jwtuniqueid") == 0);
+  GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
+             GRPC_JWT_VERIFIER_OK);
+  grpc_jwt_claims_destroy(claims);
+}
+
+static void test_expired_claims_failure(void) {
+  grpc_jwt_claims *claims;
+  gpr_slice s = gpr_slice_from_copied_string(expired_claims);
+  grpc_json *json = grpc_json_parse_string_with_len(
+      (char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s));
+  gpr_timespec exp_iat = {100, 0};
+  gpr_timespec exp_exp = {120, 0};
+  gpr_timespec exp_nbf = {60, 0};
+  GPR_ASSERT(json != NULL);
+  claims = grpc_jwt_claims_from_json(json, s);
+  GPR_ASSERT(claims != NULL);
+  GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_issuer(claims), "blah.foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_subject(claims), "juju@blah.foo.com") == 0);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_id(claims), "jwtuniqueid") == 0);
+  GPR_ASSERT(gpr_time_cmp(grpc_jwt_claims_issued_at(claims), exp_iat) == 0);
+  GPR_ASSERT(gpr_time_cmp(grpc_jwt_claims_expires_at(claims), exp_exp) == 0);
+  GPR_ASSERT(gpr_time_cmp(grpc_jwt_claims_not_before(claims), exp_nbf) == 0);
+
+  GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
+             GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE);
+  grpc_jwt_claims_destroy(claims);
+}
+
+static void test_invalid_claims_failure(void) {
+  gpr_slice s = gpr_slice_from_copied_string(invalid_claims);
+  grpc_json *json = grpc_json_parse_string_with_len(
+      (char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s));
+  GPR_ASSERT(grpc_jwt_claims_from_json(json, s) == NULL);
+}
+
+static void test_bad_audience_claims_failure(void) {
+  grpc_jwt_claims *claims;
+  gpr_slice s = gpr_slice_from_copied_string(claims_without_time_constraint);
+  grpc_json *json = grpc_json_parse_string_with_len(
+      (char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s));
+  GPR_ASSERT(json != NULL);
+  claims = grpc_jwt_claims_from_json(json, s);
+  GPR_ASSERT(claims != NULL);
+  GPR_ASSERT(grpc_jwt_claims_check(claims, "https://bar.com") ==
+             GRPC_JWT_VERIFIER_BAD_AUDIENCE);
+  grpc_jwt_claims_destroy(claims);
+}
+
+static char *json_key_str(const char *last_part) {
+  size_t result_len = strlen(json_key_str_part1) + strlen(json_key_str_part2) +
+                      strlen(last_part);
+  char *result = gpr_malloc(result_len + 1);
+  char *current = result;
+  strcpy(result, json_key_str_part1);
+  current += strlen(json_key_str_part1);
+  strcpy(current, json_key_str_part2);
+  current += strlen(json_key_str_part2);
+  strcpy(current, last_part);
+  return result;
+}
+
+static char *good_google_email_keys(void) {
+  size_t result_len = strlen(good_google_email_keys_part1) +
+                      strlen(good_google_email_keys_part2);
+  char *result = gpr_malloc(result_len + 1);
+  char *current = result;
+  strcpy(result, good_google_email_keys_part1);
+  current += strlen(good_google_email_keys_part1);
+  strcpy(current, good_google_email_keys_part2);
+  return result;
+}
+
+static grpc_httpcli_response http_response(int status, char *body) {
+  grpc_httpcli_response response;
+  memset(&response, 0, sizeof(grpc_httpcli_response));
+  response.status = status;
+  response.body = body;
+  response.body_length = strlen(body);
+  return response;
+}
+
+static int httpcli_post_should_not_be_called(
+    const grpc_httpcli_request *request, const char *body_bytes,
+    size_t body_size, gpr_timespec deadline,
+    grpc_httpcli_response_cb on_response, void *user_data) {
+  GPR_ASSERT("HTTP POST should not be called" == NULL);
+  return 1;
+}
+
+static int httpcli_get_google_keys_for_email(
+    const grpc_httpcli_request *request, gpr_timespec deadline,
+    grpc_httpcli_response_cb on_response, void *user_data) {
+  grpc_httpcli_response response = http_response(200, good_google_email_keys());
+  GPR_ASSERT(request->use_ssl);
+  GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
+  GPR_ASSERT(strcmp(request->path,
+                    "/robot/v1/metadata/x509/"
+                    "777-abaslkan11hlb6nmim3bpspl31ud@developer."
+                    "gserviceaccount.com") == 0);
+  on_response(user_data, &response);
+  gpr_free(response.body);
+  return 1;
+}
+
+static void on_verification_success(void *user_data,
+                                    grpc_jwt_verifier_status status,
+                                    grpc_jwt_claims *claims) {
+  GPR_ASSERT(status == GRPC_JWT_VERIFIER_OK);
+  GPR_ASSERT(claims != NULL);
+  GPR_ASSERT(user_data == (void *)expected_user_data);
+  GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), expected_audience) == 0);
+  grpc_jwt_claims_destroy(claims);
+}
+
+static void test_jwt_verifier_google_email_issuer_success(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_google_keys_for_email,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_success, (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static int httpcli_get_custom_keys_for_email(
+    const grpc_httpcli_request *request, gpr_timespec deadline,
+    grpc_httpcli_response_cb on_response, void *user_data) {
+  grpc_httpcli_response response = http_response(200, gpr_strdup(good_jwk_set));
+  GPR_ASSERT(request->use_ssl);
+  GPR_ASSERT(strcmp(request->host, "keys.bar.com") == 0);
+  GPR_ASSERT(strcmp(request->path, "/jwk/foo@bar.com") == 0);
+  on_response(user_data, &response);
+  gpr_free(response.body);
+  return 1;
+}
+
+static void test_jwt_verifier_custom_email_issuer_success(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(&custom_mapping, 1);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_custom_email_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_custom_keys_for_email,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_success, (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static int httpcli_get_jwk_set(
+    const grpc_httpcli_request *request, gpr_timespec deadline,
+    grpc_httpcli_response_cb on_response, void *user_data) {
+  grpc_httpcli_response response = http_response(200, gpr_strdup(good_jwk_set));
+  GPR_ASSERT(request->use_ssl);
+  GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
+  GPR_ASSERT(strcmp(request->path, "/oauth2/v3/certs") == 0);
+  on_response(user_data, &response);
+  gpr_free(response.body);
+  return 1;
+}
+
+static int httpcli_get_openid_config(const grpc_httpcli_request *request,
+                                     gpr_timespec deadline,
+                                     grpc_httpcli_response_cb on_response,
+                                     void *user_data) {
+  grpc_httpcli_response response =
+      http_response(200, gpr_strdup(good_openid_config));
+  GPR_ASSERT(request->use_ssl);
+  GPR_ASSERT(strcmp(request->host, "accounts.google.com") == 0);
+  GPR_ASSERT(strcmp(request->path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
+  grpc_httpcli_set_override(httpcli_get_jwk_set,
+                            httpcli_post_should_not_be_called);
+  on_response(user_data, &response);
+  gpr_free(response.body);
+  return 1;
+}
+
+static void test_jwt_verifier_url_issuer_success(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_url_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_openid_config,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_success, (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static void on_verification_key_retrieval_error(void *user_data,
+                                                grpc_jwt_verifier_status status,
+                                                grpc_jwt_claims *claims) {
+  GPR_ASSERT(status == GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR);
+  GPR_ASSERT(claims == NULL);
+  GPR_ASSERT(user_data == (void *)expected_user_data);
+}
+
+static int httpcli_get_bad_json(const grpc_httpcli_request *request,
+                                gpr_timespec deadline,
+                                grpc_httpcli_response_cb on_response,
+                                void *user_data) {
+  grpc_httpcli_response response =
+      http_response(200, gpr_strdup("{\"bad\": \"stuff\"}"));
+  GPR_ASSERT(request->use_ssl);
+  on_response(user_data, &response);
+  gpr_free(response.body);
+  return 1;
+}
+
+static void test_jwt_verifier_url_issuer_bad_config(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_url_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_bad_json,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_key_retrieval_error,
+                           (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static void test_jwt_verifier_bad_json_key(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_bad_json,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_key_retrieval_error,
+                           (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static void corrupt_jwt_sig(char *jwt) {
+  gpr_slice sig;
+  char *bad_b64_sig;
+  gpr_uint8 *sig_bytes;
+  char *last_dot = strrchr(jwt, '.');
+  GPR_ASSERT(last_dot != NULL);
+  sig = grpc_base64_decode(last_dot + 1, 1);
+  GPR_ASSERT(!GPR_SLICE_IS_EMPTY(sig));
+  sig_bytes = GPR_SLICE_START_PTR(sig);
+  (*sig_bytes)++; /* Corrupt first byte. */
+  bad_b64_sig =
+      grpc_base64_encode(GPR_SLICE_START_PTR(sig), GPR_SLICE_LENGTH(sig), 1, 0);
+  memcpy(last_dot + 1, bad_b64_sig, strlen(bad_b64_sig));
+  gpr_free(bad_b64_sig);
+  gpr_slice_unref(sig);
+}
+
+static void on_verification_bad_signature(void *user_data,
+                                          grpc_jwt_verifier_status status,
+                                          grpc_jwt_claims *claims) {
+  GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_SIGNATURE);
+  GPR_ASSERT(claims == NULL);
+  GPR_ASSERT(user_data == (void *)expected_user_data);
+}
+
+static void test_jwt_verifier_bad_signature(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  char *jwt = NULL;
+  char *key_str = json_key_str(json_key_str_part3_for_url_issuer);
+  grpc_auth_json_key key = grpc_auth_json_key_create_from_string(key_str);
+  gpr_free(key_str);
+  GPR_ASSERT(grpc_auth_json_key_is_valid(&key));
+  grpc_httpcli_set_override(httpcli_get_openid_config,
+                            httpcli_post_should_not_be_called);
+  jwt =
+      grpc_jwt_encode_and_sign(&key, expected_audience, expected_lifetime, NULL);
+  grpc_auth_json_key_destruct(&key);
+  corrupt_jwt_sig(jwt);
+  GPR_ASSERT(jwt != NULL);
+  grpc_jwt_verifier_verify(verifier, NULL, jwt, expected_audience,
+                           on_verification_bad_signature,
+                           (void *)expected_user_data);
+  gpr_free(jwt);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+static int httpcli_get_should_not_be_called(
+    const grpc_httpcli_request *request, gpr_timespec deadline,
+    grpc_httpcli_response_cb on_response, void *user_data) {
+  GPR_ASSERT(0);
+  return 1;
+}
+
+static void on_verification_bad_format(void *user_data,
+                                       grpc_jwt_verifier_status status,
+                                       grpc_jwt_claims *claims) {
+  GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_FORMAT);
+  GPR_ASSERT(claims == NULL);
+  GPR_ASSERT(user_data == (void *)expected_user_data);
+}
+
+static void test_jwt_verifier_bad_format(void) {
+  grpc_jwt_verifier *verifier = grpc_jwt_verifier_create(NULL, 0);
+  grpc_httpcli_set_override(httpcli_get_should_not_be_called,
+                            httpcli_post_should_not_be_called);
+  grpc_jwt_verifier_verify(verifier, NULL, "bad jwt", expected_audience,
+                           on_verification_bad_format,
+                           (void *)expected_user_data);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_httpcli_set_override(NULL, NULL);
+}
+
+/* find verification key: bad jks, cannot find key in jks */
+/* bad signature custom provided email*/
+/* bad key */
+
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  test_claims_success();
+  test_expired_claims_failure();
+  test_invalid_claims_failure();
+  test_bad_audience_claims_failure();
+  test_jwt_verifier_google_email_issuer_success();
+  test_jwt_verifier_custom_email_issuer_success();
+  test_jwt_verifier_url_issuer_success();
+  test_jwt_verifier_url_issuer_bad_config();
+  test_jwt_verifier_bad_json_key();
+  test_jwt_verifier_bad_signature();
+  test_jwt_verifier_bad_format();
+  return 0;
+}
+
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 73283c2fbd..5b55a4da13 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -91,13 +91,13 @@ int main(int argc, char **argv) {
   grpc_pollset_init(&sync.pollset);
   sync.is_done = 0;
 
-  grpc_credentials_get_request_metadata(creds, &sync.pollset, "", on_metadata_response, &sync);
+  grpc_credentials_get_request_metadata(creds, &sync.pollset, service_url,
+                                        on_metadata_response, &sync);
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
   while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
   gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
 
-  grpc_pollset_destroy(&sync.pollset);
   grpc_credentials_release(creds);
 
 end:
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.c
new file mode 100644
index 0000000000..e90be5de98
--- /dev/null
+++ b/test/core/security/verify_jwt.c
@@ -0,0 +1,119 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "src/core/security/jwt_verifier.h"
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/sync.h>
+
+typedef struct {
+  grpc_pollset pollset;
+  int is_done;
+  int success;
+} synchronizer;
+
+static void print_usage_and_exit(gpr_cmdline *cl, const char *argv0) {
+  char *usage = gpr_cmdline_usage_string(cl, argv0);
+  fprintf(stderr, "%s", usage);
+  gpr_free(usage);
+  gpr_cmdline_destroy(cl);
+  exit(1);
+}
+
+static void on_jwt_verification_done(void *user_data,
+                                     grpc_jwt_verifier_status status,
+                                     grpc_jwt_claims *claims) {
+  synchronizer *sync = user_data;
+
+  sync->success = (status == GRPC_JWT_VERIFIER_OK);
+  if (sync->success) {
+    char *claims_str;
+    GPR_ASSERT(claims != NULL);
+    claims_str =
+        grpc_json_dump_to_string((grpc_json *)grpc_jwt_claims_json(claims), 2);
+    printf("Claims: \n\n%s\n", claims_str);
+    gpr_free(claims_str);
+    grpc_jwt_claims_destroy(claims);
+  } else {
+    GPR_ASSERT(claims == NULL);
+    fprintf(stderr, "Verification failed with error %s\n",
+            grpc_jwt_verifier_status_to_string(status));
+  }
+
+  gpr_mu_lock(GRPC_POLLSET_MU(&sync->pollset));
+  sync->is_done = 1;
+  grpc_pollset_kick(&sync->pollset);
+  gpr_mu_unlock(GRPC_POLLSET_MU(&sync->pollset));
+}
+
+int main(int argc, char **argv) {
+  synchronizer sync;
+  grpc_jwt_verifier *verifier;
+  gpr_cmdline *cl;
+  char *jwt = NULL;
+  char *aud = NULL;
+
+  cl = gpr_cmdline_create("JWT verifier tool");
+  gpr_cmdline_add_string(cl, "jwt", "JSON web token to verify", &jwt);
+  gpr_cmdline_add_string(cl, "aud", "Audience for the JWT", &aud);
+  gpr_cmdline_parse(cl, argc, argv);
+  if (jwt == NULL || aud == NULL) {
+    print_usage_and_exit(cl, argv[0]);
+  }
+
+  verifier = grpc_jwt_verifier_create(NULL, 0);
+
+  grpc_init();
+
+  grpc_pollset_init(&sync.pollset);
+  sync.is_done = 0;
+
+  grpc_jwt_verifier_verify(verifier, &sync.pollset, jwt, aud,
+                           on_jwt_verification_done, &sync);
+
+  gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
+  while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
+  gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
+
+  grpc_jwt_verifier_destroy(verifier);
+  gpr_cmdline_destroy(cl);
+  return !sync.success;
+}
+
diff --git a/test/core/transport/chttp2/hpack_parser_test.c b/test/core/transport/chttp2/hpack_parser_test.c
index 1d6ad2a758..3a313375a4 100644
--- a/test/core/transport/chttp2/hpack_parser_test.c
+++ b/test/core/transport/chttp2/hpack_parser_test.c
@@ -53,7 +53,7 @@ static void onhdr(void *ud, grpc_mdelem *md) {
   GPR_ASSERT(evalue);
   GPR_ASSERT(gpr_slice_str_cmp(md->key->slice, ekey) == 0);
   GPR_ASSERT(gpr_slice_str_cmp(md->value->slice, evalue) == 0);
-  grpc_mdelem_unref(md);
+  GRPC_MDELEM_UNREF(md);
 }
 
 static void test_vector(grpc_chttp2_hpack_parser *parser,
diff --git a/test/core/transport/chttp2/hpack_table_test.c b/test/core/transport/chttp2/hpack_table_test.c
index 8b86e08168..15b37d17b6 100644
--- a/test/core/transport/chttp2/hpack_table_test.c
+++ b/test/core/transport/chttp2/hpack_table_test.c
@@ -167,7 +167,7 @@ static grpc_chttp2_hptbl_find_result find_simple(grpc_chttp2_hptbl *tbl,
                                                  const char *value) {
   grpc_mdelem *md = grpc_mdelem_from_strings(tbl->mdctx, key, value);
   grpc_chttp2_hptbl_find_result r = grpc_chttp2_hptbl_find(tbl, md);
-  grpc_mdelem_unref(md);
+  GRPC_MDELEM_UNREF(md);
   return r;
 }
 
diff --git a/test/core/transport/chttp2/stream_encoder_test.c b/test/core/transport/chttp2/stream_encoder_test.c
index 6f2ea274fe..e6731ff195 100644
--- a/test/core/transport/chttp2/stream_encoder_test.c
+++ b/test/core/transport/chttp2/stream_encoder_test.c
@@ -262,7 +262,7 @@ static void chk_hdr(void *p, grpc_mdelem *el) {
   GPR_ASSERT(0 == gpr_slice_str_cmp(el->key->slice, st->key));
   GPR_ASSERT(0 == gpr_slice_str_cmp(el->value->slice, st->value));
   st->got_hdr = 1;
-  grpc_mdelem_unref(el);
+  GRPC_MDELEM_UNREF(el);
 }
 
 static void test_decode_random_headers_inner(int max_len) {
diff --git a/test/core/transport/metadata_test.c b/test/core/transport/metadata_test.c
index 89deee5a40..a932e04f33 100644
--- a/test/core/transport/metadata_test.c
+++ b/test/core/transport/metadata_test.c
@@ -70,10 +70,10 @@ static void test_create_string(void) {
   GPR_ASSERT(s3 != s1);
   GPR_ASSERT(gpr_slice_str_cmp(s1->slice, "hello") == 0);
   GPR_ASSERT(gpr_slice_str_cmp(s3->slice, "very much not hello") == 0);
-  grpc_mdstr_unref(s1);
-  grpc_mdstr_unref(s2);
+  GRPC_MDSTR_UNREF(s1);
+  GRPC_MDSTR_UNREF(s2);
   grpc_mdctx_unref(ctx);
-  grpc_mdstr_unref(s3);
+  GRPC_MDSTR_UNREF(s3);
 }
 
 static void test_create_metadata(void) {
@@ -93,9 +93,9 @@ static void test_create_metadata(void) {
   GPR_ASSERT(gpr_slice_str_cmp(m1->key->slice, "a") == 0);
   GPR_ASSERT(gpr_slice_str_cmp(m1->value->slice, "b") == 0);
   GPR_ASSERT(gpr_slice_str_cmp(m3->value->slice, "c") == 0);
-  grpc_mdelem_unref(m1);
-  grpc_mdelem_unref(m2);
-  grpc_mdelem_unref(m3);
+  GRPC_MDELEM_UNREF(m1);
+  GRPC_MDELEM_UNREF(m2);
+  GRPC_MDELEM_UNREF(m3);
   grpc_mdctx_unref(ctx);
 }
 
@@ -112,7 +112,7 @@ static void test_create_many_ephemeral_metadata(void) {
   /* add, and immediately delete a bunch of different elements */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    grpc_mdelem_unref(grpc_mdelem_from_strings(ctx, "a", buffer));
+    GRPC_MDELEM_UNREF(grpc_mdelem_from_strings(ctx, "a", buffer));
   }
   /* capacity should not grow */
   GPR_ASSERT(mdtab_capacity_before ==
@@ -140,11 +140,11 @@ static void test_create_many_persistant_metadata(void) {
     gpr_ltoa(i, buffer);
     md = grpc_mdelem_from_strings(ctx, "a", buffer);
     GPR_ASSERT(md == created[i]);
-    grpc_mdelem_unref(md);
+    GRPC_MDELEM_UNREF(md);
   }
   /* cleanup phase */
   for (i = 0; i < MANY; i++) {
-    grpc_mdelem_unref(created[i]);
+    GRPC_MDELEM_UNREF(created[i]);
   }
   grpc_mdctx_unref(ctx);
 
@@ -160,15 +160,15 @@ static void test_spin_creating_the_same_thing(void) {
   GPR_ASSERT(grpc_mdctx_get_mdtab_count_test_only(ctx) == 0);
   GPR_ASSERT(grpc_mdctx_get_mdtab_free_test_only(ctx) == 0);
 
-  grpc_mdelem_unref(grpc_mdelem_from_strings(ctx, "a", "b"));
+  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings(ctx, "a", "b"));
   GPR_ASSERT(grpc_mdctx_get_mdtab_count_test_only(ctx) == 1);
   GPR_ASSERT(grpc_mdctx_get_mdtab_free_test_only(ctx) == 1);
 
-  grpc_mdelem_unref(grpc_mdelem_from_strings(ctx, "a", "b"));
+  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings(ctx, "a", "b"));
   GPR_ASSERT(grpc_mdctx_get_mdtab_count_test_only(ctx) == 1);
   GPR_ASSERT(grpc_mdctx_get_mdtab_free_test_only(ctx) == 1);
 
-  grpc_mdelem_unref(grpc_mdelem_from_strings(ctx, "a", "b"));
+  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings(ctx, "a", "b"));
   GPR_ASSERT(grpc_mdctx_get_mdtab_count_test_only(ctx) == 1);
   GPR_ASSERT(grpc_mdctx_get_mdtab_free_test_only(ctx) == 1);
 
@@ -196,8 +196,8 @@ static void test_things_stick_around(void) {
   }
 
   for (i = 0; i < nstrs; i++) {
-    grpc_mdstr_ref(strs[i]);
-    grpc_mdstr_unref(strs[i]);
+    GRPC_MDSTR_REF(strs[i]);
+    GRPC_MDSTR_UNREF(strs[i]);
   }
 
   for (i = 0; i < nstrs; i++) {
@@ -209,12 +209,12 @@ static void test_things_stick_around(void) {
   }
 
   for (i = 0; i < nstrs; i++) {
-    grpc_mdstr_unref(strs[shuf[i]]);
+    GRPC_MDSTR_UNREF(strs[shuf[i]]);
     for (j = i + 1; j < nstrs; j++) {
       gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%dx", shuf[j]);
       test = grpc_mdstr_from_string(ctx, buffer);
       GPR_ASSERT(test == strs[shuf[j]]);
-      grpc_mdstr_unref(test);
+      GRPC_MDSTR_UNREF(test);
       gpr_free(buffer);
     }
   }
@@ -237,14 +237,14 @@ static void test_slices_work(void) {
   str = grpc_mdstr_from_string(
       ctx, "123456789012345678901234567890123456789012345678901234567890");
   slice = gpr_slice_ref(str->slice);
-  grpc_mdstr_unref(str);
+  GRPC_MDSTR_UNREF(str);
   gpr_slice_unref(slice);
 
   str = grpc_mdstr_from_string(
       ctx, "123456789012345678901234567890123456789012345678901234567890");
   slice = gpr_slice_ref(str->slice);
   gpr_slice_unref(slice);
-  grpc_mdstr_unref(str);
+  GRPC_MDSTR_UNREF(str);
 
   grpc_mdctx_unref(ctx);
 }
@@ -264,7 +264,7 @@ static void test_base64_and_huffman_works(void) {
   GPR_ASSERT(0 == gpr_slice_cmp(slice1, slice2));
 
   gpr_slice_unref(slice2);
-  grpc_mdstr_unref(str);
+  GRPC_MDSTR_UNREF(str);
   grpc_mdctx_unref(ctx);
 }
 
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 60af84100a..0912b19243 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -98,12 +98,16 @@ void CheckAuthContext(T* context) {
 
 class TestServiceImpl : public ::grpc::cpp::test::util::TestService::Service {
  public:
-  TestServiceImpl() : signal_client_(false) {}
+  TestServiceImpl() : signal_client_(false), host_(nullptr) {}
+  explicit TestServiceImpl(const grpc::string& host) : signal_client_(false), host_(new grpc::string(host)) {}
 
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
     response->set_message(request->message());
     MaybeEchoDeadline(context, request, response);
+    if (host_) {
+      response->mutable_param()->set_host(*host_);
+    }
     if (request->has_param() && request->param().client_cancel_after_us()) {
       {
         std::unique_lock<std::mutex> lock(mu_);
@@ -205,6 +209,7 @@ class TestServiceImpl : public ::grpc::cpp::test::util::TestService::Service {
  private:
   bool signal_client_;
   std::mutex mu_;
+  std::unique_ptr<grpc::string> host_;
 };
 
 class TestServiceImplDupPkg
@@ -219,7 +224,7 @@ class TestServiceImplDupPkg
 
 class End2endTest : public ::testing::Test {
  protected:
-  End2endTest() : kMaxMessageSize_(8192), thread_pool_(2) {}
+  End2endTest() : kMaxMessageSize_(8192), special_service_("special"), thread_pool_(2) {}
 
   void SetUp() GRPC_OVERRIDE {
     int port = grpc_pick_unused_port_or_die();
@@ -229,6 +234,7 @@ class End2endTest : public ::testing::Test {
     builder.AddListeningPort(server_address_.str(),
                              FakeTransportSecurityServerCredentials());
     builder.RegisterService(&service_);
+    builder.RegisterService("special", &special_service_);
     builder.SetMaxMessageSize(
         kMaxMessageSize_);  // For testing max message size.
     builder.RegisterService(&dup_pkg_service_);
@@ -250,6 +256,7 @@ class End2endTest : public ::testing::Test {
   std::ostringstream server_address_;
   const int kMaxMessageSize_;
   TestServiceImpl service_;
+  TestServiceImpl special_service_;
   TestServiceImplDupPkg dup_pkg_service_;
   ThreadPool thread_pool_;
 };
@@ -268,6 +275,22 @@ static void SendRpc(grpc::cpp::test::util::TestService::Stub* stub,
   }
 }
 
+TEST_F(End2endTest, SimpleRpcWithHost) {
+  ResetStub();
+
+  EchoRequest request;
+  EchoResponse response;
+  request.set_message("Hello");
+
+  ClientContext context;
+  context.set_authority("special");
+  Status s = stub_->Echo(&context, request, &response);
+  EXPECT_EQ(response.message(), request.message());
+  EXPECT_TRUE(response.has_param());
+  EXPECT_EQ(response.param().host(), "special");
+  EXPECT_TRUE(s.ok());
+}
+
 TEST_F(End2endTest, SimpleRpc) {
   ResetStub();
   SendRpc(stub_.get(), 1);
diff --git a/test/cpp/util/messages.proto b/test/cpp/util/messages.proto
index 3940e70c9f..3708972b90 100644
--- a/test/cpp/util/messages.proto
+++ b/test/cpp/util/messages.proto
@@ -47,6 +47,7 @@ message EchoRequest {
 
 message ResponseParams {
   optional int64 request_deadline = 1;
+  optional string host = 2;
 }
 
 message EchoResponse {
diff --git a/tools/dockerfile/grpc_java_android/Dockerfile b/tools/dockerfile/grpc_java_android/Dockerfile
index 2dc2202e9d..8df0707758 100644
--- a/tools/dockerfile/grpc_java_android/Dockerfile
+++ b/tools/dockerfile/grpc_java_android/Dockerfile
@@ -43,27 +43,20 @@ ENV PATH $PATH:$ANDROID_HOME/platform-tools
 # Some old Docker versions consider '/' as HOME
 ENV HOME /root
 
-# Update sdk for android 5.1 (API level 22)
-RUN echo y | android update sdk --all --filter platform-tools,build-tools-22.0.1,sys-img-armeabi-v7a-addon-google_apis-google-22,sys-img-armeabi-v7a-addon-google_apis-google-21,sys-img-armeabi-v7a-android-19,addon-google_apis-google-22,addon-google_apis-google-21,addon-google_apis-google-19,extra-android-m2repository,extra-google-m2repository --no-ui --force
+# Update sdk for android API level 19 (4.4), 21 (5.0), 22 (5.1).
+RUN echo y | android update sdk --all --filter platform-tools,build-tools-22.0.1,sys-img-armeabi-v7a-addon-google_apis-google-22,sys-img-armeabi-v7a-addon-google_apis-google-21,sys-img-armeabi-v7a-android-19,android-22,android-21,android-19,addon-google_apis-google-22,addon-google_apis-google-21,addon-google_apis-google-19,extra-android-m2repository,extra-google-m2repository --no-ui --force
 
 
-# Create an AVD with API level 22
-RUN echo no | android create avd --force -n avd-google-api-22 -t "Google Inc.:Google APIs:22" --abi google_apis/armeabi-v7a
-RUN echo no | android create avd --force -n avd-google-api-21 -t "Google Inc.:Google APIs:21" --abi google_apis/armeabi-v7a
-RUN echo no | android create avd --force -n avd-google-api-19 -t "Google Inc.:Google APIs:19" --abi default/armeabi-v7a
+# Create AVDs with API level 19,21,22
+RUN echo no | android create avd --force -n avd-google-api-22 -t "Google Inc.:Google APIs:22" --abi google_apis/armeabi-v7a && \
+  echo no | android create avd --force -n avd-google-api-21 -t "Google Inc.:Google APIs:21" --abi google_apis/armeabi-v7a && \
+  echo no | android create avd --force -n avd-google-api-19 -t "Google Inc.:Google APIs:19" --abi default/armeabi-v7a
 
 # Pull gRPC Java and trigger download of needed Maven and Gradle artifacts.
 RUN git clone --depth 1 https://github.com/grpc/grpc-java.git /var/local/git/grpc-java && \
   cd /var/local/git/grpc-java && \
-  ./gradlew grpc-core:install grpc-stub:install grpc-okhttp:install grpc-protobuf-nano:install && \
-  rm -r "$(pwd)"
+  ./gradlew grpc-core:install grpc-stub:install grpc-okhttp:install grpc-protobuf-nano:install grpc-compiler:install
 
-# Pull gRPC Android integration test App
-RUN git clone --depth 1 https://github.com/madongfly/grpc-android-test.git /var/local/git/grpc-android-test
-
-# Config android sdk for gradle
-RUN cd /var/local/git/grpc-android-test && echo "sdk.dir=/usr/local/android-sdk-linux" > local.properties
-
-# Build apks to trigger download of needed Maven and Gradle artifacts.
-RUN cd /var/local/git/grpc-android-test && ./gradlew assembleDebug
-RUN cd /var/local/git/grpc-android-test && ./gradlew assembleDebugAndroidTest
+# Config android sdk for gradle and build apk to trigger download of needed Maven and Gradle artifacts.
+RUN cd /var/local/git/grpc-java/android-interop-testing && echo "sdk.dir=/usr/local/android-sdk-linux" > local.properties && \
+  ../gradlew assembleDebug
diff --git a/tools/dockerfile/grpc_java_android/README.md b/tools/dockerfile/grpc_java_android/README.md
index b4c9645e6a..5c897cd779 100644
--- a/tools/dockerfile/grpc_java_android/README.md
+++ b/tools/dockerfile/grpc_java_android/README.md
@@ -15,23 +15,23 @@ Usage
 Start the emulator in a detached container, the argument is the name of the AVD you want to start:
 
 ```
-$ sudo docker run --name=grpc_android_test -d grpc/android /var/local/git/grpc-android-test/start-emulator.sh avd-api-22
+$ sudo docker run --name=grpc_android_test -d grpc/android /var/local/git/grpc-java/android-interop-testing/start-emulator.sh avd-google-api-22
 ```
 
 You can use the following cammand to wait until the emulator is ready:
 ```
-$ sudo docker exec grpc_android_test /var/local/git/grpc-android-test/wait-for-emulator.sh
+$ sudo docker exec grpc_android_test /var/local/git/grpc-java/android-interop-testing/wait-for-emulator.sh
 ```
 
 When you want to update the apk, run:
 ```
-$ sudo docker exec grpc_android_test /var/local/git/grpc-android-test/update-apk.sh
+$ sudo docker exec grpc_android_test bash -c "cd /var/local/git/grpc-java && git pull origin master && ./gradlew grpc-core:install grpc-stub:install grpc-okhttp:install grpc-protobuf-nano:install grpc-compiler:install && cd android-interop-testing && ../gradlew installDebug"
 ```
-It will pull the fresh code of gRpc Java and our integration test app from github, build and install it to the runing emulator (so you need to make sure there is a runing emulator).
+It pulls the fresh code of gRpc Java and our interop test app from github, build and install it to the runing emulator (so you need to make sure there is a runing emulator).
 
 Trigger the integration test:
 ```
-$ sudo docker exec grpc_android_test /var/local/git/grpc-android-test/run-test.sh -e server_host <hostname or ip address> -e server_port 8030 -e server_host_override foo.test.google.fr -e use_tls true -e use_test_ca true
+$ sudo docker exec grpc_android_test adb -e shell am instrument -w -e server_host <hostname or ip address> -e server_port 8030 -e server_host_override foo.test.google.fr -e use_tls true -e use_test_ca true -e test_case all io.grpc.android.integrationtest/.TesterInstrumentation
 ```
 
 You can also use the android/adb cammands to get more info, such as:
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index e2701eca3a..ac411e3c02 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -775,6 +775,7 @@ src/core/security/auth_filters.h \
 src/core/security/base64.h \
 src/core/security/credentials.h \
 src/core/security/json_token.h \
+src/core/security/jwt_verifier.h \
 src/core/security/secure_endpoint.h \
 src/core/security/secure_transport_setup.h \
 src/core/security/security_connector.h \
@@ -891,6 +892,7 @@ src/core/security/credentials_posix.c \
 src/core/security/credentials_win32.c \
 src/core/security/google_default_credentials.c \
 src/core/security/json_token.c \
+src/core/security/jwt_verifier.c \
 src/core/security/secure_endpoint.c \
 src/core/security/secure_transport_setup.c \
 src/core/security/security_connector.c \
diff --git a/tools/jenkins/run_jenkins.sh b/tools/jenkins/run_jenkins.sh
index f2091e2423..88476b55b1 100755
--- a/tools/jenkins/run_jenkins.sh
+++ b/tools/jenkins/run_jenkins.sh
@@ -51,11 +51,8 @@ then
   # Make sure docker image has been built. Should be instantaneous if so.
   docker build -t $DOCKER_IMAGE_NAME tools/jenkins/grpc_jenkins_slave
 
-  if [ "$ghprbPullId" != "" ]
-  then
-    # if we are building a pull request, grab corresponding refs.
-    FETCH_PULL_REQUEST_CMD="&& git fetch $GIT_URL refs/pull/$ghprbPullId/merge refs/pull/$ghprbPullId/head"
-  fi
+  # Create a local branch so the child Docker script won't complain
+  git branch jenkins-docker
 
   # Make sure the CID file is gone.
   rm -f docker.cid
@@ -87,6 +84,11 @@ then
   /cygdrive/c/nuget/nuget.exe restore src/csharp/Grpc.sln
 
   python tools/run_tests/run_tests.py -t -l $language -x report.xml
+elif [ "$platform" == "macos" ]
+then
+  echo "building $language on MacOS"
+
+  ./tools/run_tests/run_tests.py -t -l $language -c $config -x report.xml
 else
   echo "Unknown platform $platform"
   exit 1
diff --git a/tools/run_tests/build_ruby.sh b/tools/run_tests/build_ruby.sh
index de96413bc1..b6c4e32b7e 100755
--- a/tools/run_tests/build_ruby.sh
+++ b/tools/run_tests/build_ruby.sh
@@ -31,7 +31,7 @@
 
 set -ex
 
-export CONFIG=${CONFIG:-opt}
+export GRPC_CONFIG=${CONFIG:-opt}
 
 # change to grpc's ruby directory
 cd $(dirname $0)/../../src/ruby
diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index 8694b8f6bd..baa126ba5f 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -95,7 +95,7 @@ def message(tag, msg, explanatory_text=None, do_newline=False):
     return
   message.old_tag = tag
   message.old_msg = msg
-  if platform.system() == 'Windows':
+  if platform.system() == 'Windows' or not sys.stdout.isatty():
     if explanatory_text:
       print explanatory_text
     print '%s: %s' % (tag, msg)
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 344933a67c..1fc5c20fe4 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -538,6 +538,20 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "grpc_jwt_verifier_test", 
+    "src": [
+      "test/core/security/jwt_verifier_test.c"
+    ]
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "grpc_print_google_default_creds_token", 
     "src": [
       "test/core/security/print_google_default_creds_token.c"
@@ -580,6 +594,20 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "grpc_verify_jwt", 
+    "src": [
+      "test/core/security/verify_jwt.c"
+    ]
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "hpack_parser_test", 
     "src": [
       "test/core/transport/chttp2/hpack_parser_test.c"
@@ -8756,6 +8784,7 @@
       "src/core/security/base64.h", 
       "src/core/security/credentials.h", 
       "src/core/security/json_token.h", 
+      "src/core/security/jwt_verifier.h", 
       "src/core/security/secure_endpoint.h", 
       "src/core/security/secure_transport_setup.h", 
       "src/core/security/security_connector.h", 
@@ -8957,6 +8986,8 @@
       "src/core/security/google_default_credentials.c", 
       "src/core/security/json_token.c", 
       "src/core/security/json_token.h", 
+      "src/core/security/jwt_verifier.c", 
+      "src/core/security/jwt_verifier.h", 
       "src/core/security/secure_endpoint.c", 
       "src/core/security/secure_endpoint.h", 
       "src/core/security/secure_transport_setup.c", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index cacec2ede7..cc05870640 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -314,6 +314,15 @@
   {
     "flaky": false, 
     "language": "c", 
+    "name": "grpc_jwt_verifier_test", 
+    "platforms": [
+      "windows", 
+      "posix"
+    ]
+  }, 
+  {
+    "flaky": false, 
+    "language": "c", 
     "name": "grpc_security_connector_test", 
     "platforms": [
       "windows", 
diff --git a/vsprojects/Grpc.mak b/vsprojects/Grpc.mak
index 6a23cc1771..d9b22550a4 100644
--- a/vsprojects/Grpc.mak
+++ b/vsprojects/Grpc.mak
@@ -57,7 +57,7 @@ $(OUT_DIR):
 build_libs: build_gpr build_gpr_test_util build_grpc build_grpc_test_util build_grpc_test_util_unsecure build_grpc_unsecure Debug\end2end_fixture_chttp2_fake_security.lib Debug\end2end_fixture_chttp2_fullstack.lib Debug\end2end_fixture_chttp2_simple_ssl_fullstack.lib Debug\end2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.lib Debug\end2end_fixture_chttp2_socket_pair.lib Debug\end2end_fixture_chttp2_socket_pair_one_byte_at_a_time.lib Debug\end2end_fixture_chttp2_socket_pair_with_grpc_trace.lib Debug\end2end_test_bad_hostname.lib Debug\end2end_test_cancel_after_accept.lib Debug\end2end_test_cancel_after_accept_and_writes_closed.lib Debug\end2end_test_cancel_after_invoke.lib Debug\end2end_test_cancel_before_invoke.lib Debug\end2end_test_cancel_in_a_vacuum.lib Debug\end2end_test_census_simple_request.lib Debug\end2end_test_disappearing_server.lib Debug\end2end_test_early_server_shutdown_finishes_inflight_calls.lib Debug\end2end_test_early_server_shutdown_finishes_tags.lib Debug\end2end_test_empty_batch.lib Debug\end2end_test_graceful_server_shutdown.lib Debug\end2end_test_invoke_large_request.lib Debug\end2end_test_max_concurrent_streams.lib Debug\end2end_test_max_message_length.lib Debug\end2end_test_no_op.lib Debug\end2end_test_ping_pong_streaming.lib Debug\end2end_test_registered_call.lib Debug\end2end_test_request_response_with_binary_metadata_and_payload.lib Debug\end2end_test_request_response_with_metadata_and_payload.lib Debug\end2end_test_request_response_with_payload.lib Debug\end2end_test_request_response_with_payload_and_call_creds.lib Debug\end2end_test_request_response_with_trailing_metadata_and_payload.lib Debug\end2end_test_request_with_flags.lib Debug\end2end_test_request_with_large_metadata.lib Debug\end2end_test_request_with_payload.lib Debug\end2end_test_server_finishes_request.lib Debug\end2end_test_simple_delayed_request.lib Debug\end2end_test_simple_request.lib Debug\end2end_test_simple_request_with_high_initial_sequence_number.lib Debug\end2end_certs.lib Debug\bad_client_test.lib 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe fling_client.exe fling_server.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_auth_context_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_security_connector_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe multi_init_test.exe multiple_server_queues_test.exe murmur_hash_test.exe no_server_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe uri_parser_test.exe chttp2_fake_security_bad_hostname_test.exe chttp2_fake_security_cancel_after_accept_test.exe chttp2_fake_security_cancel_after_accept_and_writes_closed_test.exe chttp2_fake_security_cancel_after_invoke_test.exe chttp2_fake_security_cancel_before_invoke_test.exe chttp2_fake_security_cancel_in_a_vacuum_test.exe chttp2_fake_security_census_simple_request_test.exe chttp2_fake_security_disappearing_server_test.exe chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_fake_security_early_server_shutdown_finishes_tags_test.exe chttp2_fake_security_empty_batch_test.exe chttp2_fake_security_graceful_server_shutdown_test.exe chttp2_fake_security_invoke_large_request_test.exe chttp2_fake_security_max_concurrent_streams_test.exe chttp2_fake_security_max_message_length_test.exe chttp2_fake_security_no_op_test.exe chttp2_fake_security_ping_pong_streaming_test.exe chttp2_fake_security_registered_call_test.exe chttp2_fake_security_request_response_with_binary_metadata_and_payload_test.exe chttp2_fake_security_request_response_with_metadata_and_payload_test.exe chttp2_fake_security_request_response_with_payload_test.exe chttp2_fake_security_request_response_with_payload_and_call_creds_test.exe chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test.exe chttp2_fake_security_request_with_flags_test.exe chttp2_fake_security_request_with_large_metadata_test.exe chttp2_fake_security_request_with_payload_test.exe chttp2_fake_security_server_finishes_request_test.exe chttp2_fake_security_simple_delayed_request_test.exe chttp2_fake_security_simple_request_test.exe chttp2_fake_security_simple_request_with_high_initial_sequence_number_test.exe chttp2_fullstack_bad_hostname_test.exe chttp2_fullstack_cancel_after_accept_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_fullstack_cancel_after_invoke_test.exe chttp2_fullstack_cancel_before_invoke_test.exe chttp2_fullstack_cancel_in_a_vacuum_test.exe chttp2_fullstack_census_simple_request_test.exe chttp2_fullstack_disappearing_server_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_fullstack_empty_batch_test.exe chttp2_fullstack_graceful_server_shutdown_test.exe chttp2_fullstack_invoke_large_request_test.exe chttp2_fullstack_max_concurrent_streams_test.exe chttp2_fullstack_max_message_length_test.exe chttp2_fullstack_no_op_test.exe chttp2_fullstack_ping_pong_streaming_test.exe chttp2_fullstack_registered_call_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_fullstack_request_response_with_payload_test.exe chttp2_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_fullstack_request_with_flags_test.exe chttp2_fullstack_request_with_large_metadata_test.exe chttp2_fullstack_request_with_payload_test.exe chttp2_fullstack_server_finishes_request_test.exe chttp2_fullstack_simple_delayed_request_test.exe chttp2_fullstack_simple_request_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_simple_ssl_fullstack_bad_hostname_test.exe chttp2_simple_ssl_fullstack_cancel_after_accept_test.exe chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_simple_ssl_fullstack_cancel_after_invoke_test.exe chttp2_simple_ssl_fullstack_cancel_before_invoke_test.exe chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_test.exe chttp2_simple_ssl_fullstack_census_simple_request_test.exe chttp2_simple_ssl_fullstack_disappearing_server_test.exe chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_simple_ssl_fullstack_empty_batch_test.exe chttp2_simple_ssl_fullstack_graceful_server_shutdown_test.exe chttp2_simple_ssl_fullstack_invoke_large_request_test.exe chttp2_simple_ssl_fullstack_max_concurrent_streams_test.exe chttp2_simple_ssl_fullstack_max_message_length_test.exe chttp2_simple_ssl_fullstack_no_op_test.exe chttp2_simple_ssl_fullstack_ping_pong_streaming_test.exe chttp2_simple_ssl_fullstack_registered_call_test.exe chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_with_flags_test.exe chttp2_simple_ssl_fullstack_request_with_large_metadata_test.exe chttp2_simple_ssl_fullstack_request_with_payload_test.exe chttp2_simple_ssl_fullstack_server_finishes_request_test.exe chttp2_simple_ssl_fullstack_simple_delayed_request_test.exe chttp2_simple_ssl_fullstack_simple_request_test.exe chttp2_simple_ssl_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_before_invoke_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_in_a_vacuum_test.exe chttp2_simple_ssl_with_oauth2_fullstack_census_simple_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_disappearing_server_test.exe chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test.exe chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test.exe chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test.exe chttp2_simple_ssl_with_oauth2_fullstack_max_message_length_test.exe chttp2_simple_ssl_with_oauth2_fullstack_no_op_test.exe chttp2_simple_ssl_with_oauth2_fullstack_ping_pong_streaming_test.exe chttp2_simple_ssl_with_oauth2_fullstack_registered_call_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_flags_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_server_finishes_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_bad_hostname_test.exe chttp2_socket_pair_cancel_after_accept_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_cancel_after_invoke_test.exe chttp2_socket_pair_cancel_before_invoke_test.exe chttp2_socket_pair_cancel_in_a_vacuum_test.exe chttp2_socket_pair_census_simple_request_test.exe chttp2_socket_pair_disappearing_server_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_empty_batch_test.exe chttp2_socket_pair_graceful_server_shutdown_test.exe chttp2_socket_pair_invoke_large_request_test.exe chttp2_socket_pair_max_concurrent_streams_test.exe chttp2_socket_pair_max_message_length_test.exe chttp2_socket_pair_no_op_test.exe chttp2_socket_pair_ping_pong_streaming_test.exe chttp2_socket_pair_registered_call_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_request_response_with_payload_test.exe chttp2_socket_pair_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_request_with_flags_test.exe chttp2_socket_pair_request_with_large_metadata_test.exe chttp2_socket_pair_request_with_payload_test.exe chttp2_socket_pair_server_finishes_request_test.exe chttp2_socket_pair_simple_delayed_request_test.exe chttp2_socket_pair_simple_request_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_flags_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_with_grpc_trace_bad_hostname_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_test.exe chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_test.exe chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_test.exe chttp2_socket_pair_with_grpc_trace_census_simple_request_test.exe chttp2_socket_pair_with_grpc_trace_disappearing_server_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_with_grpc_trace_empty_batch_test.exe chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_test.exe chttp2_socket_pair_with_grpc_trace_invoke_large_request_test.exe chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_test.exe chttp2_socket_pair_with_grpc_trace_max_message_length_test.exe chttp2_socket_pair_with_grpc_trace_no_op_test.exe chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_test.exe chttp2_socket_pair_with_grpc_trace_registered_call_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_with_flags_test.exe chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_test.exe chttp2_socket_pair_with_grpc_trace_request_with_payload_test.exe chttp2_socket_pair_with_grpc_trace_server_finishes_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_delayed_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_test.exe chttp2_fullstack_bad_hostname_unsecure_test.exe chttp2_fullstack_cancel_after_accept_unsecure_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_census_simple_request_unsecure_test.exe chttp2_fullstack_disappearing_server_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_empty_batch_unsecure_test.exe chttp2_fullstack_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_invoke_large_request_unsecure_test.exe chttp2_fullstack_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_max_message_length_unsecure_test.exe chttp2_fullstack_no_op_unsecure_test.exe chttp2_fullstack_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_registered_call_unsecure_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_payload_unsecure_test.exe chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_with_flags_unsecure_test.exe chttp2_fullstack_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_request_with_payload_unsecure_test.exe chttp2_fullstack_server_finishes_request_unsecure_test.exe chttp2_fullstack_simple_delayed_request_unsecure_test.exe chttp2_fullstack_simple_request_unsecure_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_bad_hostname_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_census_simple_request_unsecure_test.exe chttp2_socket_pair_disappearing_server_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_empty_batch_unsecure_test.exe chttp2_socket_pair_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_invoke_large_request_unsecure_test.exe chttp2_socket_pair_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_max_message_length_unsecure_test.exe chttp2_socket_pair_no_op_unsecure_test.exe chttp2_socket_pair_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_registered_call_unsecure_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_with_flags_unsecure_test.exe chttp2_socket_pair_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_request_with_payload_unsecure_test.exe chttp2_socket_pair_server_finishes_request_unsecure_test.exe chttp2_socket_pair_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_simple_request_unsecure_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_flags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_bad_hostname_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_census_simple_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_disappearing_server_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_max_message_length_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_no_op_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_registered_call_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_flags_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_server_finishes_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test.exe connection_prefix_bad_client_test.exe initial_settings_frame_bad_client_test.exe 
+buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe fling_client.exe fling_server.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_auth_context_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_jwt_verifier_test.exe grpc_security_connector_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe multi_init_test.exe multiple_server_queues_test.exe murmur_hash_test.exe no_server_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe uri_parser_test.exe chttp2_fake_security_bad_hostname_test.exe chttp2_fake_security_cancel_after_accept_test.exe chttp2_fake_security_cancel_after_accept_and_writes_closed_test.exe chttp2_fake_security_cancel_after_invoke_test.exe chttp2_fake_security_cancel_before_invoke_test.exe chttp2_fake_security_cancel_in_a_vacuum_test.exe chttp2_fake_security_census_simple_request_test.exe chttp2_fake_security_disappearing_server_test.exe chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_fake_security_early_server_shutdown_finishes_tags_test.exe chttp2_fake_security_empty_batch_test.exe chttp2_fake_security_graceful_server_shutdown_test.exe chttp2_fake_security_invoke_large_request_test.exe chttp2_fake_security_max_concurrent_streams_test.exe chttp2_fake_security_max_message_length_test.exe chttp2_fake_security_no_op_test.exe chttp2_fake_security_ping_pong_streaming_test.exe chttp2_fake_security_registered_call_test.exe chttp2_fake_security_request_response_with_binary_metadata_and_payload_test.exe chttp2_fake_security_request_response_with_metadata_and_payload_test.exe chttp2_fake_security_request_response_with_payload_test.exe chttp2_fake_security_request_response_with_payload_and_call_creds_test.exe chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test.exe chttp2_fake_security_request_with_flags_test.exe chttp2_fake_security_request_with_large_metadata_test.exe chttp2_fake_security_request_with_payload_test.exe chttp2_fake_security_server_finishes_request_test.exe chttp2_fake_security_simple_delayed_request_test.exe chttp2_fake_security_simple_request_test.exe chttp2_fake_security_simple_request_with_high_initial_sequence_number_test.exe chttp2_fullstack_bad_hostname_test.exe chttp2_fullstack_cancel_after_accept_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_fullstack_cancel_after_invoke_test.exe chttp2_fullstack_cancel_before_invoke_test.exe chttp2_fullstack_cancel_in_a_vacuum_test.exe chttp2_fullstack_census_simple_request_test.exe chttp2_fullstack_disappearing_server_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_fullstack_empty_batch_test.exe chttp2_fullstack_graceful_server_shutdown_test.exe chttp2_fullstack_invoke_large_request_test.exe chttp2_fullstack_max_concurrent_streams_test.exe chttp2_fullstack_max_message_length_test.exe chttp2_fullstack_no_op_test.exe chttp2_fullstack_ping_pong_streaming_test.exe chttp2_fullstack_registered_call_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_fullstack_request_response_with_payload_test.exe chttp2_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_fullstack_request_with_flags_test.exe chttp2_fullstack_request_with_large_metadata_test.exe chttp2_fullstack_request_with_payload_test.exe chttp2_fullstack_server_finishes_request_test.exe chttp2_fullstack_simple_delayed_request_test.exe chttp2_fullstack_simple_request_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_simple_ssl_fullstack_bad_hostname_test.exe chttp2_simple_ssl_fullstack_cancel_after_accept_test.exe chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_simple_ssl_fullstack_cancel_after_invoke_test.exe chttp2_simple_ssl_fullstack_cancel_before_invoke_test.exe chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_test.exe chttp2_simple_ssl_fullstack_census_simple_request_test.exe chttp2_simple_ssl_fullstack_disappearing_server_test.exe chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_simple_ssl_fullstack_empty_batch_test.exe chttp2_simple_ssl_fullstack_graceful_server_shutdown_test.exe chttp2_simple_ssl_fullstack_invoke_large_request_test.exe chttp2_simple_ssl_fullstack_max_concurrent_streams_test.exe chttp2_simple_ssl_fullstack_max_message_length_test.exe chttp2_simple_ssl_fullstack_no_op_test.exe chttp2_simple_ssl_fullstack_ping_pong_streaming_test.exe chttp2_simple_ssl_fullstack_registered_call_test.exe chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_payload_test.exe chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_simple_ssl_fullstack_request_with_flags_test.exe chttp2_simple_ssl_fullstack_request_with_large_metadata_test.exe chttp2_simple_ssl_fullstack_request_with_payload_test.exe chttp2_simple_ssl_fullstack_server_finishes_request_test.exe chttp2_simple_ssl_fullstack_simple_delayed_request_test.exe chttp2_simple_ssl_fullstack_simple_request_test.exe chttp2_simple_ssl_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_before_invoke_test.exe chttp2_simple_ssl_with_oauth2_fullstack_cancel_in_a_vacuum_test.exe chttp2_simple_ssl_with_oauth2_fullstack_census_simple_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_disappearing_server_test.exe chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_tags_test.exe chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test.exe chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test.exe chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test.exe chttp2_simple_ssl_with_oauth2_fullstack_max_message_length_test.exe chttp2_simple_ssl_with_oauth2_fullstack_no_op_test.exe chttp2_simple_ssl_with_oauth2_fullstack_ping_pong_streaming_test.exe chttp2_simple_ssl_with_oauth2_fullstack_registered_call_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_flags_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test.exe chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test.exe chttp2_simple_ssl_with_oauth2_fullstack_server_finishes_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_request_test.exe chttp2_simple_ssl_with_oauth2_fullstack_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_bad_hostname_test.exe chttp2_socket_pair_cancel_after_accept_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_cancel_after_invoke_test.exe chttp2_socket_pair_cancel_before_invoke_test.exe chttp2_socket_pair_cancel_in_a_vacuum_test.exe chttp2_socket_pair_census_simple_request_test.exe chttp2_socket_pair_disappearing_server_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_empty_batch_test.exe chttp2_socket_pair_graceful_server_shutdown_test.exe chttp2_socket_pair_invoke_large_request_test.exe chttp2_socket_pair_max_concurrent_streams_test.exe chttp2_socket_pair_max_message_length_test.exe chttp2_socket_pair_no_op_test.exe chttp2_socket_pair_ping_pong_streaming_test.exe chttp2_socket_pair_registered_call_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_request_response_with_payload_test.exe chttp2_socket_pair_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_request_with_flags_test.exe chttp2_socket_pair_request_with_large_metadata_test.exe chttp2_socket_pair_request_with_payload_test.exe chttp2_socket_pair_server_finishes_request_test.exe chttp2_socket_pair_simple_delayed_request_test.exe chttp2_socket_pair_simple_request_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_flags_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test.exe chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_test.exe chttp2_socket_pair_with_grpc_trace_bad_hostname_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_test.exe chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_test.exe chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_test.exe chttp2_socket_pair_with_grpc_trace_census_simple_request_test.exe chttp2_socket_pair_with_grpc_trace_disappearing_server_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_test.exe chttp2_socket_pair_with_grpc_trace_empty_batch_test.exe chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_test.exe chttp2_socket_pair_with_grpc_trace_invoke_large_request_test.exe chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_test.exe chttp2_socket_pair_with_grpc_trace_max_message_length_test.exe chttp2_socket_pair_with_grpc_trace_no_op_test.exe chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_test.exe chttp2_socket_pair_with_grpc_trace_registered_call_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_and_call_creds_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_test.exe chttp2_socket_pair_with_grpc_trace_request_with_flags_test.exe chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_test.exe chttp2_socket_pair_with_grpc_trace_request_with_payload_test.exe chttp2_socket_pair_with_grpc_trace_server_finishes_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_delayed_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_test.exe chttp2_fullstack_bad_hostname_unsecure_test.exe chttp2_fullstack_cancel_after_accept_unsecure_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_census_simple_request_unsecure_test.exe chttp2_fullstack_disappearing_server_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_empty_batch_unsecure_test.exe chttp2_fullstack_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_invoke_large_request_unsecure_test.exe chttp2_fullstack_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_max_message_length_unsecure_test.exe chttp2_fullstack_no_op_unsecure_test.exe chttp2_fullstack_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_registered_call_unsecure_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_payload_unsecure_test.exe chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_with_flags_unsecure_test.exe chttp2_fullstack_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_request_with_payload_unsecure_test.exe chttp2_fullstack_server_finishes_request_unsecure_test.exe chttp2_fullstack_simple_delayed_request_unsecure_test.exe chttp2_fullstack_simple_request_unsecure_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_bad_hostname_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_census_simple_request_unsecure_test.exe chttp2_socket_pair_disappearing_server_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_empty_batch_unsecure_test.exe chttp2_socket_pair_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_invoke_large_request_unsecure_test.exe chttp2_socket_pair_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_max_message_length_unsecure_test.exe chttp2_socket_pair_no_op_unsecure_test.exe chttp2_socket_pair_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_registered_call_unsecure_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_with_flags_unsecure_test.exe chttp2_socket_pair_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_request_with_payload_unsecure_test.exe chttp2_socket_pair_server_finishes_request_unsecure_test.exe chttp2_socket_pair_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_simple_request_unsecure_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_flags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_bad_hostname_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_census_simple_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_disappearing_server_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_max_message_length_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_no_op_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_registered_call_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_flags_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_request_with_payload_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_server_finishes_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_unsecure_test.exe chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test.exe connection_prefix_bad_client_test.exe initial_settings_frame_bad_client_test.exe 
 	echo All tests built.
 
 buildtests_cxx: interop_client.exe interop_server.exe 
@@ -308,6 +308,13 @@ grpc_json_token_test.exe: build_libs $(OUT_DIR)
 grpc_json_token_test: grpc_json_token_test.exe
 	echo Running grpc_json_token_test
 	$(OUT_DIR)\grpc_json_token_test.exe
+grpc_jwt_verifier_test.exe: build_libs $(OUT_DIR)
+	echo Building grpc_jwt_verifier_test
+	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ $(REPO_ROOT)\test\core\security\jwt_verifier_test.c 
+	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\grpc_jwt_verifier_test.exe" Debug\grpc_test_util.lib Debug\grpc.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) $(OUT_DIR)\jwt_verifier_test.obj 
+grpc_jwt_verifier_test: grpc_jwt_verifier_test.exe
+	echo Running grpc_jwt_verifier_test
+	$(OUT_DIR)\grpc_jwt_verifier_test.exe
 grpc_print_google_default_creds_token.exe: build_libs $(OUT_DIR)
 	echo Building grpc_print_google_default_creds_token
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ $(REPO_ROOT)\test\core\security\print_google_default_creds_token.c 
@@ -329,6 +336,13 @@ grpc_stream_op_test.exe: build_libs $(OUT_DIR)
 grpc_stream_op_test: grpc_stream_op_test.exe
 	echo Running grpc_stream_op_test
 	$(OUT_DIR)\grpc_stream_op_test.exe
+grpc_verify_jwt.exe: build_libs $(OUT_DIR)
+	echo Building grpc_verify_jwt
+	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ $(REPO_ROOT)\test\core\security\verify_jwt.c 
+	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\grpc_verify_jwt.exe" Debug\grpc_test_util.lib Debug\grpc.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) $(OUT_DIR)\verify_jwt.obj 
+grpc_verify_jwt: grpc_verify_jwt.exe
+	echo Running grpc_verify_jwt
+	$(OUT_DIR)\grpc_verify_jwt.exe
 hpack_parser_test.exe: build_libs $(OUT_DIR)
 	echo Building hpack_parser_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ $(REPO_ROOT)\test\core\transport\chttp2\hpack_parser_test.c 
diff --git a/vsprojects/grpc/grpc.vcxproj b/vsprojects/grpc/grpc.vcxproj
index 14ddf95f81..865e76ef10 100644
--- a/vsprojects/grpc/grpc.vcxproj
+++ b/vsprojects/grpc/grpc.vcxproj
@@ -164,6 +164,7 @@
     <ClInclude Include="..\..\src\core\security\base64.h" />
     <ClInclude Include="..\..\src\core\security\credentials.h" />
     <ClInclude Include="..\..\src\core\security\json_token.h" />
+    <ClInclude Include="..\..\src\core\security\jwt_verifier.h" />
     <ClInclude Include="..\..\src\core\security\secure_endpoint.h" />
     <ClInclude Include="..\..\src\core\security\secure_transport_setup.h" />
     <ClInclude Include="..\..\src\core\security\security_connector.h" />
@@ -294,6 +295,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\security\json_token.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\security\jwt_verifier.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\security\secure_endpoint.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\security\secure_transport_setup.c">
diff --git a/vsprojects/grpc/grpc.vcxproj.filters b/vsprojects/grpc/grpc.vcxproj.filters
index 591fe1bb03..f560fef9ed 100644
--- a/vsprojects/grpc/grpc.vcxproj.filters
+++ b/vsprojects/grpc/grpc.vcxproj.filters
@@ -37,6 +37,9 @@
     <ClCompile Include="..\..\src\core\security\json_token.c">
       <Filter>src\core\security</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\security\jwt_verifier.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\security\secure_endpoint.c">
       <Filter>src\core\security</Filter>
     </ClCompile>
@@ -446,6 +449,9 @@
     <ClInclude Include="..\..\src\core\security\json_token.h">
       <Filter>src\core\security</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\security\jwt_verifier.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\security\secure_endpoint.h">
       <Filter>src\core\security</Filter>
     </ClInclude>