diff options
Diffstat (limited to 'src/core/lib/security/security_connector/security_connector.cc')
| -rw-r--r-- | src/core/lib/security/security_connector/security_connector.cc | 1040 |
1 files changed, 0 insertions, 1040 deletions
diff --git a/src/core/lib/security/security_connector/security_connector.cc b/src/core/lib/security/security_connector/security_connector.cc index 7028ae8d16..02cecb0eb1 100644 --- a/src/core/lib/security/security_connector/security_connector.cc +++ b/src/core/lib/security/security_connector/security_connector.cc @@ -20,8 +20,6 @@ #include "src/core/lib/security/security_connector/security_connector.h" -#include <stdbool.h> - #include <grpc/slice_buffer.h> #include <grpc/support/alloc.h> #include <grpc/support/log.h> @@ -36,88 +34,12 @@ #include "src/core/lib/iomgr/load_file.h" #include "src/core/lib/security/context/security_context.h" #include "src/core/lib/security/credentials/credentials.h" -#include "src/core/lib/security/credentials/fake/fake_credentials.h" -#include "src/core/lib/security/credentials/ssl/ssl_credentials.h" #include "src/core/lib/security/security_connector/load_system_roots.h" -#include "src/core/lib/security/transport/secure_endpoint.h" #include "src/core/lib/security/transport/security_handshaker.h" -#include "src/core/lib/security/transport/target_authority_table.h" -#include "src/core/tsi/fake_transport_security.h" -#include "src/core/tsi/ssl_transport_security.h" grpc_core::DebugOnlyTraceFlag grpc_trace_security_connector_refcount( false, "security_connector_refcount"); -/* -- Constants. -- */ - -#ifndef INSTALL_PREFIX -static const char* installed_roots_path = "/usr/share/grpc/roots.pem"; -#else -static const char* installed_roots_path = - INSTALL_PREFIX "/share/grpc/roots.pem"; -#endif - -/** Environment variable used as a flag to enable/disable loading system root - certificates from the OS trust store. */ -#ifndef GRPC_NOT_USE_SYSTEM_SSL_ROOTS_ENV_VAR -#define GRPC_NOT_USE_SYSTEM_SSL_ROOTS_ENV_VAR "GRPC_NOT_USE_SYSTEM_SSL_ROOTS" -#endif - -#ifndef TSI_OPENSSL_ALPN_SUPPORT -#define TSI_OPENSSL_ALPN_SUPPORT 1 -#endif - -/* -- Overridden default roots. -- */ - -static grpc_ssl_roots_override_callback ssl_roots_override_cb = nullptr; - -void grpc_set_ssl_roots_override_callback(grpc_ssl_roots_override_callback cb) { - ssl_roots_override_cb = cb; -} - -/* -- Cipher suites. -- */ - -/* Defines the cipher suites that we accept by default. All these cipher suites - are compliant with HTTP2. */ -#define GRPC_SSL_CIPHER_SUITES \ - "ECDHE-ECDSA-AES128-GCM-SHA256:" \ - "ECDHE-ECDSA-AES256-GCM-SHA384:" \ - "ECDHE-RSA-AES128-GCM-SHA256:" \ - "ECDHE-RSA-AES256-GCM-SHA384" - -static gpr_once cipher_suites_once = GPR_ONCE_INIT; -static const char* cipher_suites = nullptr; - -static void init_cipher_suites(void) { - char* overridden = gpr_getenv("GRPC_SSL_CIPHER_SUITES"); - cipher_suites = overridden != nullptr ? overridden : GRPC_SSL_CIPHER_SUITES; -} - -static const char* ssl_cipher_suites(void) { - gpr_once_init(&cipher_suites_once, init_cipher_suites); - return cipher_suites; -} - -/* -- Common methods. -- */ - -/* Returns the first property with that name. */ -const tsi_peer_property* tsi_peer_get_property_by_name(const tsi_peer* peer, - const char* name) { - size_t i; - if (peer == nullptr) return nullptr; - for (i = 0; i < peer->property_count; i++) { - const tsi_peer_property* property = &peer->properties[i]; - if (name == nullptr && property->name == nullptr) { - return property; - } - if (name != nullptr && property->name != nullptr && - strcmp(property->name, name) == 0) { - return property; - } - } - return nullptr; -} - void grpc_channel_security_connector_add_handshakers( grpc_channel_security_connector* connector, grpc_pollset_set* interested_parties, @@ -288,965 +210,3 @@ grpc_security_connector* grpc_security_connector_find_in_args( } return nullptr; } - -static tsi_client_certificate_request_type -get_tsi_client_certificate_request_type( - grpc_ssl_client_certificate_request_type grpc_request_type) { - switch (grpc_request_type) { - case GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE: - return TSI_DONT_REQUEST_CLIENT_CERTIFICATE; - - case GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY: - return TSI_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY; - - case GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY: - return TSI_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY; - - case GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY: - return TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY; - - case GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY: - return TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY; - - default: - return TSI_DONT_REQUEST_CLIENT_CERTIFICATE; - } -} - -/* -- Fake implementation. -- */ - -typedef struct { - grpc_channel_security_connector base; - char* target; - char* expected_targets; - bool is_lb_channel; - char* target_name_override; -} grpc_fake_channel_security_connector; - -static void fake_channel_destroy(grpc_security_connector* sc) { - grpc_fake_channel_security_connector* c = - reinterpret_cast<grpc_fake_channel_security_connector*>(sc); - grpc_call_credentials_unref(c->base.request_metadata_creds); - gpr_free(c->target); - gpr_free(c->expected_targets); - gpr_free(c->target_name_override); - gpr_free(c); -} - -static void fake_server_destroy(grpc_security_connector* sc) { gpr_free(sc); } - -static bool fake_check_target(const char* target_type, const char* target, - const char* set_str) { - GPR_ASSERT(target_type != nullptr); - GPR_ASSERT(target != nullptr); - char** set = nullptr; - size_t set_size = 0; - gpr_string_split(set_str, ",", &set, &set_size); - bool found = false; - for (size_t i = 0; i < set_size; ++i) { - if (set[i] != nullptr && strcmp(target, set[i]) == 0) found = true; - } - for (size_t i = 0; i < set_size; ++i) { - gpr_free(set[i]); - } - gpr_free(set); - return found; -} - -static void fake_secure_name_check(const char* target, - const char* expected_targets, - bool is_lb_channel) { - if (expected_targets == nullptr) return; - char** lbs_and_backends = nullptr; - size_t lbs_and_backends_size = 0; - bool success = false; - gpr_string_split(expected_targets, ";", &lbs_and_backends, - &lbs_and_backends_size); - if (lbs_and_backends_size > 2 || lbs_and_backends_size == 0) { - gpr_log(GPR_ERROR, "Invalid expected targets arg value: '%s'", - expected_targets); - goto done; - } - if (is_lb_channel) { - if (lbs_and_backends_size != 2) { - gpr_log(GPR_ERROR, - "Invalid expected targets arg value: '%s'. Expectations for LB " - "channels must be of the form 'be1,be2,be3,...;lb1,lb2,...", - expected_targets); - goto done; - } - if (!fake_check_target("LB", target, lbs_and_backends[1])) { - gpr_log(GPR_ERROR, "LB target '%s' not found in expected set '%s'", - target, lbs_and_backends[1]); - goto done; - } - success = true; - } else { - if (!fake_check_target("Backend", target, lbs_and_backends[0])) { - gpr_log(GPR_ERROR, "Backend target '%s' not found in expected set '%s'", - target, lbs_and_backends[0]); - goto done; - } - success = true; - } -done: - for (size_t i = 0; i < lbs_and_backends_size; ++i) { - gpr_free(lbs_and_backends[i]); - } - gpr_free(lbs_and_backends); - if (!success) abort(); -} - -static void fake_check_peer(grpc_security_connector* sc, tsi_peer peer, - grpc_auth_context** auth_context, - grpc_closure* on_peer_checked) { - const char* prop_name; - grpc_error* error = GRPC_ERROR_NONE; - *auth_context = nullptr; - if (peer.property_count != 1) { - error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Fake peers should only have 1 property."); - goto end; - } - prop_name = peer.properties[0].name; - if (prop_name == nullptr || - strcmp(prop_name, TSI_CERTIFICATE_TYPE_PEER_PROPERTY)) { - char* msg; - gpr_asprintf(&msg, "Unexpected property in fake peer: %s.", - prop_name == nullptr ? "<EMPTY>" : prop_name); - error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg); - gpr_free(msg); - goto end; - } - if (strncmp(peer.properties[0].value.data, TSI_FAKE_CERTIFICATE_TYPE, - peer.properties[0].value.length)) { - error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Invalid value for cert type property."); - goto end; - } - *auth_context = grpc_auth_context_create(nullptr); - grpc_auth_context_add_cstring_property( - *auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME, - GRPC_FAKE_TRANSPORT_SECURITY_TYPE); -end: - GRPC_CLOSURE_SCHED(on_peer_checked, error); - tsi_peer_destruct(&peer); -} - -static void fake_channel_check_peer(grpc_security_connector* sc, tsi_peer peer, - grpc_auth_context** auth_context, - grpc_closure* on_peer_checked) { - fake_check_peer(sc, peer, auth_context, on_peer_checked); - grpc_fake_channel_security_connector* c = - reinterpret_cast<grpc_fake_channel_security_connector*>(sc); - fake_secure_name_check(c->target, c->expected_targets, c->is_lb_channel); -} - -static void fake_server_check_peer(grpc_security_connector* sc, tsi_peer peer, - grpc_auth_context** auth_context, - grpc_closure* on_peer_checked) { - fake_check_peer(sc, peer, auth_context, on_peer_checked); -} - -static int fake_channel_cmp(grpc_security_connector* sc1, - grpc_security_connector* sc2) { - grpc_fake_channel_security_connector* c1 = - reinterpret_cast<grpc_fake_channel_security_connector*>(sc1); - grpc_fake_channel_security_connector* c2 = - reinterpret_cast<grpc_fake_channel_security_connector*>(sc2); - int c = grpc_channel_security_connector_cmp(&c1->base, &c2->base); - if (c != 0) return c; - c = strcmp(c1->target, c2->target); - if (c != 0) return c; - if (c1->expected_targets == nullptr || c2->expected_targets == nullptr) { - c = GPR_ICMP(c1->expected_targets, c2->expected_targets); - } else { - c = strcmp(c1->expected_targets, c2->expected_targets); - } - if (c != 0) return c; - return GPR_ICMP(c1->is_lb_channel, c2->is_lb_channel); -} - -static int fake_server_cmp(grpc_security_connector* sc1, - grpc_security_connector* sc2) { - return grpc_server_security_connector_cmp( - reinterpret_cast<grpc_server_security_connector*>(sc1), - reinterpret_cast<grpc_server_security_connector*>(sc2)); -} - -static bool fake_channel_check_call_host(grpc_channel_security_connector* sc, - const char* host, - grpc_auth_context* auth_context, - grpc_closure* on_call_host_checked, - grpc_error** error) { - grpc_fake_channel_security_connector* c = - reinterpret_cast<grpc_fake_channel_security_connector*>(sc); - char* authority_hostname = nullptr; - char* authority_ignored_port = nullptr; - char* target_hostname = nullptr; - char* target_ignored_port = nullptr; - gpr_split_host_port(host, &authority_hostname, &authority_ignored_port); - gpr_split_host_port(c->target, &target_hostname, &target_ignored_port); - if (c->target_name_override != nullptr) { - char* fake_security_target_name_override_hostname = nullptr; - char* fake_security_target_name_override_ignored_port = nullptr; - gpr_split_host_port(c->target_name_override, - &fake_security_target_name_override_hostname, - &fake_security_target_name_override_ignored_port); - if (strcmp(authority_hostname, - fake_security_target_name_override_hostname) != 0) { - gpr_log(GPR_ERROR, - "Authority (host) '%s' != Fake Security Target override '%s'", - host, fake_security_target_name_override_hostname); - abort(); - } - gpr_free(fake_security_target_name_override_hostname); - gpr_free(fake_security_target_name_override_ignored_port); - } else if (strcmp(authority_hostname, target_hostname) != 0) { - gpr_log(GPR_ERROR, "Authority (host) '%s' != Target '%s'", - authority_hostname, target_hostname); - abort(); - } - gpr_free(authority_hostname); - gpr_free(authority_ignored_port); - gpr_free(target_hostname); - gpr_free(target_ignored_port); - return true; -} - -static void fake_channel_cancel_check_call_host( - grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked, - grpc_error* error) { - GRPC_ERROR_UNREF(error); -} - -static void fake_channel_add_handshakers( - grpc_channel_security_connector* sc, grpc_pollset_set* interested_parties, - grpc_handshake_manager* handshake_mgr) { - grpc_handshake_manager_add( - handshake_mgr, - grpc_security_handshaker_create( - tsi_create_fake_handshaker(true /* is_client */), &sc->base)); -} - -static void fake_server_add_handshakers(grpc_server_security_connector* sc, - grpc_pollset_set* interested_parties, - grpc_handshake_manager* handshake_mgr) { - grpc_handshake_manager_add( - handshake_mgr, - grpc_security_handshaker_create( - tsi_create_fake_handshaker(false /* is_client */), &sc->base)); -} - -static grpc_security_connector_vtable fake_channel_vtable = { - fake_channel_destroy, fake_channel_check_peer, fake_channel_cmp}; - -static grpc_security_connector_vtable fake_server_vtable = { - fake_server_destroy, fake_server_check_peer, fake_server_cmp}; - -grpc_channel_security_connector* grpc_fake_channel_security_connector_create( - grpc_channel_credentials* channel_creds, - grpc_call_credentials* request_metadata_creds, const char* target, - const grpc_channel_args* args) { - grpc_fake_channel_security_connector* c = - static_cast<grpc_fake_channel_security_connector*>( - gpr_zalloc(sizeof(*c))); - gpr_ref_init(&c->base.base.refcount, 1); - c->base.base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME; - c->base.base.vtable = &fake_channel_vtable; - c->base.channel_creds = channel_creds; - c->base.request_metadata_creds = - grpc_call_credentials_ref(request_metadata_creds); - c->base.check_call_host = fake_channel_check_call_host; - c->base.cancel_check_call_host = fake_channel_cancel_check_call_host; - c->base.add_handshakers = fake_channel_add_handshakers; - c->target = gpr_strdup(target); - const char* expected_targets = grpc_fake_transport_get_expected_targets(args); - c->expected_targets = gpr_strdup(expected_targets); - c->is_lb_channel = grpc_core::FindTargetAuthorityTableInArgs(args) != nullptr; - const grpc_arg* target_name_override_arg = - grpc_channel_args_find(args, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG); - if (target_name_override_arg != nullptr) { - c->target_name_override = - gpr_strdup(grpc_channel_arg_get_string(target_name_override_arg)); - } - return &c->base; -} - -grpc_server_security_connector* grpc_fake_server_security_connector_create( - grpc_server_credentials* server_creds) { - grpc_server_security_connector* c = - static_cast<grpc_server_security_connector*>( - gpr_zalloc(sizeof(grpc_server_security_connector))); - gpr_ref_init(&c->base.refcount, 1); - c->base.vtable = &fake_server_vtable; - c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME; - c->server_creds = server_creds; - c->add_handshakers = fake_server_add_handshakers; - return c; -} - -/* --- Ssl implementation. --- */ - -grpc_ssl_session_cache* grpc_ssl_session_cache_create_lru(size_t capacity) { - tsi_ssl_session_cache* cache = tsi_ssl_session_cache_create_lru(capacity); - return reinterpret_cast<grpc_ssl_session_cache*>(cache); -} - -void grpc_ssl_session_cache_destroy(grpc_ssl_session_cache* cache) { - tsi_ssl_session_cache* tsi_cache = - reinterpret_cast<tsi_ssl_session_cache*>(cache); - tsi_ssl_session_cache_unref(tsi_cache); -} - -static void* grpc_ssl_session_cache_arg_copy(void* p) { - tsi_ssl_session_cache* tsi_cache = - reinterpret_cast<tsi_ssl_session_cache*>(p); - // destroy call below will unref the pointer. - tsi_ssl_session_cache_ref(tsi_cache); - return p; -} - -static void grpc_ssl_session_cache_arg_destroy(void* p) { - tsi_ssl_session_cache* tsi_cache = - reinterpret_cast<tsi_ssl_session_cache*>(p); - tsi_ssl_session_cache_unref(tsi_cache); -} - -static int grpc_ssl_session_cache_arg_cmp(void* p, void* q) { - return GPR_ICMP(p, q); -} - -grpc_arg grpc_ssl_session_cache_create_channel_arg( - grpc_ssl_session_cache* cache) { - static const grpc_arg_pointer_vtable vtable = { - grpc_ssl_session_cache_arg_copy, - grpc_ssl_session_cache_arg_destroy, - grpc_ssl_session_cache_arg_cmp, - }; - return grpc_channel_arg_pointer_create( - const_cast<char*>(GRPC_SSL_SESSION_CACHE_ARG), cache, &vtable); -} - -typedef struct { - grpc_channel_security_connector base; - tsi_ssl_client_handshaker_factory* client_handshaker_factory; - char* target_name; - char* overridden_target_name; - const verify_peer_options* verify_options; -} grpc_ssl_channel_security_connector; - -typedef struct { - grpc_server_security_connector base; - tsi_ssl_server_handshaker_factory* server_handshaker_factory; -} grpc_ssl_server_security_connector; - -static bool server_connector_has_cert_config_fetcher( - grpc_ssl_server_security_connector* c) { - GPR_ASSERT(c != nullptr); - grpc_ssl_server_credentials* server_creds = - reinterpret_cast<grpc_ssl_server_credentials*>(c->base.server_creds); - GPR_ASSERT(server_creds != nullptr); - return server_creds->certificate_config_fetcher.cb != nullptr; -} - -static void ssl_channel_destroy(grpc_security_connector* sc) { - grpc_ssl_channel_security_connector* c = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc); - grpc_channel_credentials_unref(c->base.channel_creds); - grpc_call_credentials_unref(c->base.request_metadata_creds); - tsi_ssl_client_handshaker_factory_unref(c->client_handshaker_factory); - c->client_handshaker_factory = nullptr; - if (c->target_name != nullptr) gpr_free(c->target_name); - if (c->overridden_target_name != nullptr) gpr_free(c->overridden_target_name); - gpr_free(sc); -} - -static void ssl_server_destroy(grpc_security_connector* sc) { - grpc_ssl_server_security_connector* c = - reinterpret_cast<grpc_ssl_server_security_connector*>(sc); - grpc_server_credentials_unref(c->base.server_creds); - tsi_ssl_server_handshaker_factory_unref(c->server_handshaker_factory); - c->server_handshaker_factory = nullptr; - gpr_free(sc); -} - -static void ssl_channel_add_handshakers(grpc_channel_security_connector* sc, - grpc_pollset_set* interested_parties, - grpc_handshake_manager* handshake_mgr) { - grpc_ssl_channel_security_connector* c = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc); - // Instantiate TSI handshaker. - tsi_handshaker* tsi_hs = nullptr; - tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker( - c->client_handshaker_factory, - c->overridden_target_name != nullptr ? c->overridden_target_name - : c->target_name, - &tsi_hs); - if (result != TSI_OK) { - gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.", - tsi_result_to_string(result)); - return; - } - // Create handshakers. - grpc_handshake_manager_add( - handshake_mgr, grpc_security_handshaker_create(tsi_hs, &sc->base)); -} - -static const char** fill_alpn_protocol_strings(size_t* num_alpn_protocols) { - GPR_ASSERT(num_alpn_protocols != nullptr); - *num_alpn_protocols = grpc_chttp2_num_alpn_versions(); - const char** alpn_protocol_strings = static_cast<const char**>( - gpr_malloc(sizeof(const char*) * (*num_alpn_protocols))); - for (size_t i = 0; i < *num_alpn_protocols; i++) { - alpn_protocol_strings[i] = grpc_chttp2_get_alpn_version_index(i); - } - return alpn_protocol_strings; -} - -/* Attempts to replace the server_handshaker_factory with a new factory using - * the provided grpc_ssl_server_certificate_config. Should new factory creation - * fail, the existing factory will not be replaced. Returns true on success (new - * factory created). */ -static bool try_replace_server_handshaker_factory( - grpc_ssl_server_security_connector* sc, - const grpc_ssl_server_certificate_config* config) { - if (config == nullptr) { - gpr_log(GPR_ERROR, - "Server certificate config callback returned invalid (NULL) " - "config."); - return false; - } - gpr_log(GPR_DEBUG, "Using new server certificate config (%p).", config); - - size_t num_alpn_protocols = 0; - const char** alpn_protocol_strings = - fill_alpn_protocol_strings(&num_alpn_protocols); - tsi_ssl_pem_key_cert_pair* cert_pairs = grpc_convert_grpc_to_tsi_cert_pairs( - config->pem_key_cert_pairs, config->num_key_cert_pairs); - tsi_ssl_server_handshaker_factory* new_handshaker_factory = nullptr; - grpc_ssl_server_credentials* server_creds = - reinterpret_cast<grpc_ssl_server_credentials*>(sc->base.server_creds); - tsi_result result = tsi_create_ssl_server_handshaker_factory_ex( - cert_pairs, config->num_key_cert_pairs, config->pem_root_certs, - get_tsi_client_certificate_request_type( - server_creds->config.client_certificate_request), - ssl_cipher_suites(), alpn_protocol_strings, - static_cast<uint16_t>(num_alpn_protocols), &new_handshaker_factory); - gpr_free(cert_pairs); - gpr_free((void*)alpn_protocol_strings); - - if (result != TSI_OK) { - gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.", - tsi_result_to_string(result)); - return false; - } - tsi_ssl_server_handshaker_factory_unref(sc->server_handshaker_factory); - sc->server_handshaker_factory = new_handshaker_factory; - return true; -} - -/* Attempts to fetch the server certificate config if a callback is available. - * Current certificate config will continue to be used if the callback returns - * an error. Returns true if new credentials were sucessfully loaded. */ -static bool try_fetch_ssl_server_credentials( - grpc_ssl_server_security_connector* sc) { - grpc_ssl_server_certificate_config* certificate_config = nullptr; - bool status; - - GPR_ASSERT(sc != nullptr); - if (!server_connector_has_cert_config_fetcher(sc)) return false; - - grpc_ssl_server_credentials* server_creds = - reinterpret_cast<grpc_ssl_server_credentials*>(sc->base.server_creds); - grpc_ssl_certificate_config_reload_status cb_result = - server_creds->certificate_config_fetcher.cb( - server_creds->certificate_config_fetcher.user_data, - &certificate_config); - if (cb_result == GRPC_SSL_CERTIFICATE_CONFIG_RELOAD_UNCHANGED) { - gpr_log(GPR_DEBUG, "No change in SSL server credentials."); - status = false; - } else if (cb_result == GRPC_SSL_CERTIFICATE_CONFIG_RELOAD_NEW) { - status = try_replace_server_handshaker_factory(sc, certificate_config); - } else { - // Log error, continue using previously-loaded credentials. - gpr_log(GPR_ERROR, - "Failed fetching new server credentials, continuing to " - "use previously-loaded credentials."); - status = false; - } - - if (certificate_config != nullptr) { - grpc_ssl_server_certificate_config_destroy(certificate_config); - } - return status; -} - -static void ssl_server_add_handshakers(grpc_server_security_connector* sc, - grpc_pollset_set* interested_parties, - grpc_handshake_manager* handshake_mgr) { - grpc_ssl_server_security_connector* c = - reinterpret_cast<grpc_ssl_server_security_connector*>(sc); - // Instantiate TSI handshaker. - try_fetch_ssl_server_credentials(c); - tsi_handshaker* tsi_hs = nullptr; - tsi_result result = tsi_ssl_server_handshaker_factory_create_handshaker( - c->server_handshaker_factory, &tsi_hs); - if (result != TSI_OK) { - gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.", - tsi_result_to_string(result)); - return; - } - // Create handshakers. - grpc_handshake_manager_add( - handshake_mgr, grpc_security_handshaker_create(tsi_hs, &sc->base)); -} - -int grpc_ssl_host_matches_name(const tsi_peer* peer, const char* peer_name) { - char* allocated_name = nullptr; - int r; - - char* ignored_port; - gpr_split_host_port(peer_name, &allocated_name, &ignored_port); - gpr_free(ignored_port); - peer_name = allocated_name; - if (!peer_name) return 0; - - // IPv6 zone-id should not be included in comparisons. - char* const zone_id = strchr(allocated_name, '%'); - if (zone_id != nullptr) *zone_id = '\0'; - - r = tsi_ssl_peer_matches_name(peer, peer_name); - gpr_free(allocated_name); - return r; -} - -grpc_auth_context* grpc_ssl_peer_to_auth_context(const tsi_peer* peer) { - size_t i; - grpc_auth_context* ctx = nullptr; - const char* peer_identity_property_name = nullptr; - - /* The caller has checked the certificate type property. */ - GPR_ASSERT(peer->property_count >= 1); - ctx = grpc_auth_context_create(nullptr); - grpc_auth_context_add_cstring_property( - ctx, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME, - GRPC_SSL_TRANSPORT_SECURITY_TYPE); - for (i = 0; i < peer->property_count; i++) { - const tsi_peer_property* prop = &peer->properties[i]; - if (prop->name == nullptr) continue; - if (strcmp(prop->name, TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY) == 0) { - /* If there is no subject alt name, have the CN as the identity. */ - if (peer_identity_property_name == nullptr) { - peer_identity_property_name = GRPC_X509_CN_PROPERTY_NAME; - } - grpc_auth_context_add_property(ctx, GRPC_X509_CN_PROPERTY_NAME, - prop->value.data, prop->value.length); - } else if (strcmp(prop->name, - TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY) == 0) { - peer_identity_property_name = GRPC_X509_SAN_PROPERTY_NAME; - grpc_auth_context_add_property(ctx, GRPC_X509_SAN_PROPERTY_NAME, - prop->value.data, prop->value.length); - } else if (strcmp(prop->name, TSI_X509_PEM_CERT_PROPERTY) == 0) { - grpc_auth_context_add_property(ctx, GRPC_X509_PEM_CERT_PROPERTY_NAME, - prop->value.data, prop->value.length); - } else if (strcmp(prop->name, TSI_SSL_SESSION_REUSED_PEER_PROPERTY) == 0) { - grpc_auth_context_add_property(ctx, GRPC_SSL_SESSION_REUSED_PROPERTY, - prop->value.data, prop->value.length); - } - } - if (peer_identity_property_name != nullptr) { - GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name( - ctx, peer_identity_property_name) == 1); - } - return ctx; -} - -static grpc_error* ssl_check_peer(grpc_security_connector* sc, - const char* peer_name, const tsi_peer* peer, - grpc_auth_context** auth_context) { -#if TSI_OPENSSL_ALPN_SUPPORT - /* Check the ALPN if ALPN is supported. */ - const tsi_peer_property* p = - tsi_peer_get_property_by_name(peer, TSI_SSL_ALPN_SELECTED_PROTOCOL); - if (p == nullptr) { - return GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Cannot check peer: missing selected ALPN property."); - } - if (!grpc_chttp2_is_alpn_version_supported(p->value.data, p->value.length)) { - return GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Cannot check peer: invalid ALPN value."); - } -#endif /* TSI_OPENSSL_ALPN_SUPPORT */ - /* Check the peer name if specified. */ - if (peer_name != nullptr && !grpc_ssl_host_matches_name(peer, peer_name)) { - char* msg; - gpr_asprintf(&msg, "Peer name %s is not in peer certificate", peer_name); - grpc_error* error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg); - gpr_free(msg); - return error; - } - *auth_context = grpc_ssl_peer_to_auth_context(peer); - return GRPC_ERROR_NONE; -} - -static void ssl_channel_check_peer(grpc_security_connector* sc, tsi_peer peer, - grpc_auth_context** auth_context, - grpc_closure* on_peer_checked) { - grpc_ssl_channel_security_connector* c = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc); - const char* target_name = c->overridden_target_name != nullptr - ? c->overridden_target_name - : c->target_name; - grpc_error* error = ssl_check_peer(sc, target_name, &peer, auth_context); - if (error == GRPC_ERROR_NONE && - c->verify_options->verify_peer_callback != nullptr) { - const tsi_peer_property* p = - tsi_peer_get_property_by_name(&peer, TSI_X509_PEM_CERT_PROPERTY); - if (p == nullptr) { - error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Cannot check peer: missing pem cert property."); - } else { - char* peer_pem = static_cast<char*>(gpr_malloc(p->value.length + 1)); - memcpy(peer_pem, p->value.data, p->value.length); - peer_pem[p->value.length] = '\0'; - int callback_status = c->verify_options->verify_peer_callback( - target_name, peer_pem, - c->verify_options->verify_peer_callback_userdata); - gpr_free(peer_pem); - if (callback_status) { - char* msg; - gpr_asprintf(&msg, "Verify peer callback returned a failure (%d)", - callback_status); - error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg); - gpr_free(msg); - } - } - } - GRPC_CLOSURE_SCHED(on_peer_checked, error); - tsi_peer_destruct(&peer); -} - -static void ssl_server_check_peer(grpc_security_connector* sc, tsi_peer peer, - grpc_auth_context** auth_context, - grpc_closure* on_peer_checked) { - grpc_error* error = ssl_check_peer(sc, nullptr, &peer, auth_context); - tsi_peer_destruct(&peer); - GRPC_CLOSURE_SCHED(on_peer_checked, error); -} - -static int ssl_channel_cmp(grpc_security_connector* sc1, - grpc_security_connector* sc2) { - grpc_ssl_channel_security_connector* c1 = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc1); - grpc_ssl_channel_security_connector* c2 = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc2); - int c = grpc_channel_security_connector_cmp(&c1->base, &c2->base); - if (c != 0) return c; - c = strcmp(c1->target_name, c2->target_name); - if (c != 0) return c; - return (c1->overridden_target_name == nullptr || - c2->overridden_target_name == nullptr) - ? GPR_ICMP(c1->overridden_target_name, c2->overridden_target_name) - : strcmp(c1->overridden_target_name, c2->overridden_target_name); -} - -static int ssl_server_cmp(grpc_security_connector* sc1, - grpc_security_connector* sc2) { - return grpc_server_security_connector_cmp( - reinterpret_cast<grpc_server_security_connector*>(sc1), - reinterpret_cast<grpc_server_security_connector*>(sc2)); -} - -static void add_shallow_auth_property_to_peer(tsi_peer* peer, - const grpc_auth_property* prop, - const char* tsi_prop_name) { - tsi_peer_property* tsi_prop = &peer->properties[peer->property_count++]; - tsi_prop->name = const_cast<char*>(tsi_prop_name); - tsi_prop->value.data = prop->value; - tsi_prop->value.length = prop->value_length; -} - -tsi_peer grpc_shallow_peer_from_ssl_auth_context( - const grpc_auth_context* auth_context) { - size_t max_num_props = 0; - grpc_auth_property_iterator it; - const grpc_auth_property* prop; - tsi_peer peer; - memset(&peer, 0, sizeof(peer)); - - it = grpc_auth_context_property_iterator(auth_context); - while (grpc_auth_property_iterator_next(&it) != nullptr) max_num_props++; - - if (max_num_props > 0) { - peer.properties = static_cast<tsi_peer_property*>( - gpr_malloc(max_num_props * sizeof(tsi_peer_property))); - it = grpc_auth_context_property_iterator(auth_context); - while ((prop = grpc_auth_property_iterator_next(&it)) != nullptr) { - if (strcmp(prop->name, GRPC_X509_SAN_PROPERTY_NAME) == 0) { - add_shallow_auth_property_to_peer( - &peer, prop, TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY); - } else if (strcmp(prop->name, GRPC_X509_CN_PROPERTY_NAME) == 0) { - add_shallow_auth_property_to_peer( - &peer, prop, TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY); - } else if (strcmp(prop->name, GRPC_X509_PEM_CERT_PROPERTY_NAME) == 0) { - add_shallow_auth_property_to_peer(&peer, prop, - TSI_X509_PEM_CERT_PROPERTY); - } - } - } - return peer; -} - -void grpc_shallow_peer_destruct(tsi_peer* peer) { - if (peer->properties != nullptr) gpr_free(peer->properties); -} - -static bool ssl_channel_check_call_host(grpc_channel_security_connector* sc, - const char* host, - grpc_auth_context* auth_context, - grpc_closure* on_call_host_checked, - grpc_error** error) { - grpc_ssl_channel_security_connector* c = - reinterpret_cast<grpc_ssl_channel_security_connector*>(sc); - grpc_security_status status = GRPC_SECURITY_ERROR; - tsi_peer peer = grpc_shallow_peer_from_ssl_auth_context(auth_context); - if (grpc_ssl_host_matches_name(&peer, host)) status = GRPC_SECURITY_OK; - /* If the target name was overridden, then the original target_name was - 'checked' transitively during the previous peer check at the end of the - handshake. */ - if (c->overridden_target_name != nullptr && - strcmp(host, c->target_name) == 0) { - status = GRPC_SECURITY_OK; - } - if (status != GRPC_SECURITY_OK) { - *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "call host does not match SSL server name"); - } - grpc_shallow_peer_destruct(&peer); - return true; -} - -static void ssl_channel_cancel_check_call_host( - grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked, - grpc_error* error) { - GRPC_ERROR_UNREF(error); -} - -static grpc_security_connector_vtable ssl_channel_vtable = { - ssl_channel_destroy, ssl_channel_check_peer, ssl_channel_cmp}; - -static grpc_security_connector_vtable ssl_server_vtable = { - ssl_server_destroy, ssl_server_check_peer, ssl_server_cmp}; - -grpc_security_status grpc_ssl_channel_security_connector_create( - grpc_channel_credentials* channel_creds, - grpc_call_credentials* request_metadata_creds, - const grpc_ssl_config* config, const char* target_name, - const char* overridden_target_name, - tsi_ssl_session_cache* ssl_session_cache, - grpc_channel_security_connector** sc) { - tsi_result result = TSI_OK; - grpc_ssl_channel_security_connector* c; - char* port; - bool has_key_cert_pair; - tsi_ssl_client_handshaker_options options; - memset(&options, 0, sizeof(options)); - options.alpn_protocols = - fill_alpn_protocol_strings(&options.num_alpn_protocols); - - if (config == nullptr || target_name == nullptr) { - gpr_log(GPR_ERROR, "An ssl channel needs a config and a target name."); - goto error; - } - if (config->pem_root_certs == nullptr) { - // Use default root certificates. - options.pem_root_certs = grpc_core::DefaultSslRootStore::GetPemRootCerts(); - options.root_store = grpc_core::DefaultSslRootStore::GetRootStore(); - if (options.pem_root_certs == nullptr) { - gpr_log(GPR_ERROR, "Could not get default pem root certs."); - goto error; - } - } else { - options.pem_root_certs = config->pem_root_certs; - } - c = static_cast<grpc_ssl_channel_security_connector*>( - gpr_zalloc(sizeof(grpc_ssl_channel_security_connector))); - - gpr_ref_init(&c->base.base.refcount, 1); - c->base.base.vtable = &ssl_channel_vtable; - c->base.base.url_scheme = GRPC_SSL_URL_SCHEME; - c->base.channel_creds = grpc_channel_credentials_ref(channel_creds); - c->base.request_metadata_creds = - grpc_call_credentials_ref(request_metadata_creds); - c->base.check_call_host = ssl_channel_check_call_host; - c->base.cancel_check_call_host = ssl_channel_cancel_check_call_host; - c->base.add_handshakers = ssl_channel_add_handshakers; - gpr_split_host_port(target_name, &c->target_name, &port); - gpr_free(port); - if (overridden_target_name != nullptr) { - c->overridden_target_name = gpr_strdup(overridden_target_name); - } - c->verify_options = &config->verify_options; - - has_key_cert_pair = config->pem_key_cert_pair != nullptr && - config->pem_key_cert_pair->private_key != nullptr && - config->pem_key_cert_pair->cert_chain != nullptr; - if (has_key_cert_pair) { - options.pem_key_cert_pair = config->pem_key_cert_pair; - } - options.cipher_suites = ssl_cipher_suites(); - options.session_cache = ssl_session_cache; - result = tsi_create_ssl_client_handshaker_factory_with_options( - &options, &c->client_handshaker_factory); - if (result != TSI_OK) { - gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.", - tsi_result_to_string(result)); - ssl_channel_destroy(&c->base.base); - *sc = nullptr; - goto error; - } - *sc = &c->base; - gpr_free((void*)options.alpn_protocols); - return GRPC_SECURITY_OK; - -error: - gpr_free((void*)options.alpn_protocols); - return GRPC_SECURITY_ERROR; -} - -static grpc_ssl_server_security_connector* -grpc_ssl_server_security_connector_initialize( - grpc_server_credentials* server_creds) { - grpc_ssl_server_security_connector* c = - static_cast<grpc_ssl_server_security_connector*>( - gpr_zalloc(sizeof(grpc_ssl_server_security_connector))); - gpr_ref_init(&c->base.base.refcount, 1); - c->base.base.url_scheme = GRPC_SSL_URL_SCHEME; - c->base.base.vtable = &ssl_server_vtable; - c->base.add_handshakers = ssl_server_add_handshakers; - c->base.server_creds = grpc_server_credentials_ref(server_creds); - return c; -} - -grpc_security_status grpc_ssl_server_security_connector_create( - grpc_server_credentials* gsc, grpc_server_security_connector** sc) { - tsi_result result = TSI_OK; - grpc_ssl_server_credentials* server_credentials = - reinterpret_cast<grpc_ssl_server_credentials*>(gsc); - grpc_security_status retval = GRPC_SECURITY_OK; - - GPR_ASSERT(server_credentials != nullptr); - GPR_ASSERT(sc != nullptr); - - grpc_ssl_server_security_connector* c = - grpc_ssl_server_security_connector_initialize(gsc); - if (server_connector_has_cert_config_fetcher(c)) { - // Load initial credentials from certificate_config_fetcher: - if (!try_fetch_ssl_server_credentials(c)) { - gpr_log(GPR_ERROR, "Failed loading SSL server credentials from fetcher."); - retval = GRPC_SECURITY_ERROR; - } - } else { - size_t num_alpn_protocols = 0; - const char** alpn_protocol_strings = - fill_alpn_protocol_strings(&num_alpn_protocols); - result = tsi_create_ssl_server_handshaker_factory_ex( - server_credentials->config.pem_key_cert_pairs, - server_credentials->config.num_key_cert_pairs, - server_credentials->config.pem_root_certs, - get_tsi_client_certificate_request_type( - server_credentials->config.client_certificate_request), - ssl_cipher_suites(), alpn_protocol_strings, - static_cast<uint16_t>(num_alpn_protocols), - &c->server_handshaker_factory); - gpr_free((void*)alpn_protocol_strings); - if (result != TSI_OK) { - gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.", - tsi_result_to_string(result)); - retval = GRPC_SECURITY_ERROR; - } - } - - if (retval == GRPC_SECURITY_OK) { - *sc = &c->base; - } else { - if (c != nullptr) ssl_server_destroy(&c->base.base); - if (sc != nullptr) *sc = nullptr; - } - return retval; -} - -namespace grpc_core { - -tsi_ssl_root_certs_store* DefaultSslRootStore::default_root_store_; -grpc_slice DefaultSslRootStore::default_pem_root_certs_; - -const tsi_ssl_root_certs_store* DefaultSslRootStore::GetRootStore() { - InitRootStore(); - return default_root_store_; -} - -const char* DefaultSslRootStore::GetPemRootCerts() { - InitRootStore(); - return GRPC_SLICE_IS_EMPTY(default_pem_root_certs_) - ? nullptr - : reinterpret_cast<const char*> - GRPC_SLICE_START_PTR(default_pem_root_certs_); -} - -grpc_slice DefaultSslRootStore::ComputePemRootCerts() { - grpc_slice result = grpc_empty_slice(); - char* not_use_system_roots_env_value = - gpr_getenv(GRPC_NOT_USE_SYSTEM_SSL_ROOTS_ENV_VAR); - const bool not_use_system_roots = gpr_is_true(not_use_system_roots_env_value); - gpr_free(not_use_system_roots_env_value); - // First try to load the roots from the environment. - char* default_root_certs_path = - gpr_getenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR); - if (default_root_certs_path != nullptr) { - GRPC_LOG_IF_ERROR("load_file", - grpc_load_file(default_root_certs_path, 1, &result)); - gpr_free(default_root_certs_path); - } - // Try overridden roots if needed. - grpc_ssl_roots_override_result ovrd_res = GRPC_SSL_ROOTS_OVERRIDE_FAIL; - if (GRPC_SLICE_IS_EMPTY(result) && ssl_roots_override_cb != nullptr) { - char* pem_root_certs = nullptr; - ovrd_res = ssl_roots_override_cb(&pem_root_certs); - if (ovrd_res == GRPC_SSL_ROOTS_OVERRIDE_OK) { - GPR_ASSERT(pem_root_certs != nullptr); - result = grpc_slice_from_copied_buffer( - pem_root_certs, - strlen(pem_root_certs) + 1); // nullptr terminator. - } - gpr_free(pem_root_certs); - } - // Try loading roots from OS trust store if flag is enabled. - if (GRPC_SLICE_IS_EMPTY(result) && !not_use_system_roots) { - result = LoadSystemRootCerts(); - } - // Fallback to roots manually shipped with gRPC. - if (GRPC_SLICE_IS_EMPTY(result) && - ovrd_res != GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY) { - GRPC_LOG_IF_ERROR("load_file", - grpc_load_file(installed_roots_path, 1, &result)); - } - return result; -} - -void DefaultSslRootStore::InitRootStore() { - static gpr_once once = GPR_ONCE_INIT; - gpr_once_init(&once, DefaultSslRootStore::InitRootStoreOnce); -} - -void DefaultSslRootStore::InitRootStoreOnce() { - default_pem_root_certs_ = ComputePemRootCerts(); - if (!GRPC_SLICE_IS_EMPTY(default_pem_root_certs_)) { - default_root_store_ = - tsi_ssl_root_certs_store_create(reinterpret_cast<const char*>( - GRPC_SLICE_START_PTR(default_pem_root_certs_))); - } -} - -} // namespace grpc_core |