/* * * 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/lib/security/transport/security_connector.h" #include #include #include #include #include #include #include #include "src/core/ext/transport/chttp2/alpn/alpn.h" #include "src/core/lib/channel/channel_args.h" #include "src/core/lib/channel/handshaker.h" #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/transport/lb_targets_info.h" #include "src/core/lib/security/transport/secure_endpoint.h" #include "src/core/lib/security/transport/security_handshaker.h" #include "src/core/lib/support/env.h" #include "src/core/lib/support/string.h" #include "src/core/tsi/fake_transport_security.h" #include "src/core/tsi/ssl_transport_security.h" #include "src/core/tsi/transport_security_adapter.h" /* -- 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 /* -- Overridden default roots. -- */ static grpc_ssl_roots_override_callback ssl_roots_override_cb = NULL; 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-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384" static gpr_once cipher_suites_once = GPR_ONCE_INIT; static const char *cipher_suites = NULL; static void init_cipher_suites(void) { char *overridden = gpr_getenv("GRPC_SSL_CIPHER_SUITES"); cipher_suites = overridden != NULL ? 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 == NULL) return NULL; for (i = 0; i < peer->property_count; i++) { const tsi_peer_property *property = &peer->properties[i]; if (name == NULL && property->name == NULL) { return property; } if (name != NULL && property->name != NULL && strcmp(property->name, name) == 0) { return property; } } return NULL; } void grpc_channel_security_connector_add_handshakers( grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *connector, grpc_handshake_manager *handshake_mgr) { if (connector != NULL) { connector->add_handshakers(exec_ctx, connector, handshake_mgr); } } void grpc_server_security_connector_add_handshakers( grpc_exec_ctx *exec_ctx, grpc_server_security_connector *connector, grpc_handshake_manager *handshake_mgr) { if (connector != NULL) { connector->add_handshakers(exec_ctx, connector, handshake_mgr); } } void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_auth_context **auth_context, grpc_closure *on_peer_checked) { if (sc == NULL) { grpc_closure_sched(exec_ctx, on_peer_checked, GRPC_ERROR_CREATE_FROM_STATIC_STRING( "cannot check peer -- no security connector")); tsi_peer_destruct(&peer); } else { sc->vtable->check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked); } } void grpc_channel_security_connector_check_call_host( grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, const char *host, grpc_auth_context *auth_context, grpc_security_call_host_check_cb cb, void *user_data) { if (sc == NULL || sc->check_call_host == NULL) { cb(exec_ctx, user_data, GRPC_SECURITY_ERROR); } else { sc->check_call_host(exec_ctx, sc, host, auth_context, cb, user_data); } } #ifdef GRPC_SECURITY_CONNECTOR_REFCOUNT_DEBUG grpc_security_connector *grpc_security_connector_ref( grpc_security_connector *sc, const char *file, int line, const char *reason) { if (sc == NULL) return NULL; gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "SECURITY_CONNECTOR:%p ref %d -> %d %s", sc, (int)sc->refcount.count, (int)sc->refcount.count + 1, reason); #else grpc_security_connector *grpc_security_connector_ref( grpc_security_connector *sc) { if (sc == NULL) return NULL; #endif gpr_ref(&sc->refcount); return sc; } #ifdef GRPC_SECURITY_CONNECTOR_REFCOUNT_DEBUG void grpc_security_connector_unref(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, const char *file, int line, const char *reason) { if (sc == NULL) return; gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "SECURITY_CONNECTOR:%p unref %d -> %d %s", sc, (int)sc->refcount.count, (int)sc->refcount.count - 1, reason); #else void grpc_security_connector_unref(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc) { if (sc == NULL) return; #endif if (gpr_unref(&sc->refcount)) sc->vtable->destroy(exec_ctx, sc); } static void connector_pointer_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) { GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, p, "connector_pointer_arg_destroy"); } static void *connector_pointer_arg_copy(void *p) { return GRPC_SECURITY_CONNECTOR_REF(p, "connector_pointer_arg_copy"); } static int connector_pointer_cmp(void *a, void *b) { return GPR_ICMP(a, b); } static const grpc_arg_pointer_vtable connector_pointer_vtable = { connector_pointer_arg_copy, connector_pointer_arg_destroy, connector_pointer_cmp}; grpc_arg grpc_security_connector_to_arg(grpc_security_connector *sc) { grpc_arg result; result.type = GRPC_ARG_POINTER; result.key = GRPC_ARG_SECURITY_CONNECTOR; result.value.pointer.vtable = &connector_pointer_vtable; result.value.pointer.p = sc; return result; } grpc_security_connector *grpc_security_connector_from_arg(const grpc_arg *arg) { if (strcmp(arg->key, GRPC_ARG_SECURITY_CONNECTOR)) return NULL; if (arg->type != GRPC_ARG_POINTER) { gpr_log(GPR_ERROR, "Invalid type %d for arg %s", arg->type, GRPC_ARG_SECURITY_CONNECTOR); return NULL; } return arg->value.pointer.p; } grpc_security_connector *grpc_security_connector_find_in_args( const grpc_channel_args *args) { size_t i; if (args == NULL) return NULL; for (i = 0; i < args->num_args; i++) { grpc_security_connector *sc = grpc_security_connector_from_arg(&args->args[i]); if (sc != NULL) return sc; } return NULL; } /* -- Fake implementation. -- */ typedef struct { grpc_channel_security_connector base; char *target; char *expected_targets; bool is_lb_channel; } grpc_fake_channel_security_connector; static void fake_channel_destroy(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc) { grpc_fake_channel_security_connector *c = (grpc_fake_channel_security_connector *)sc; grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds); gpr_free(c->target); gpr_free(c->expected_targets); gpr_free(c); } static void fake_server_destroy(grpc_exec_ctx *exec_ctx, 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 != NULL); GPR_ASSERT(target != NULL); char **set = NULL; 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] != NULL && 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 == NULL) return; char **lbs_and_backends = NULL; 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_exec_ctx *exec_ctx, 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 = NULL; 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 == NULL || strcmp(prop_name, TSI_CERTIFICATE_TYPE_PEER_PROPERTY)) { char *msg; gpr_asprintf(&msg, "Unexpected property in fake peer: %s.", prop_name == NULL ? "" : 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(NULL); grpc_auth_context_add_cstring_property( *auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME, GRPC_FAKE_TRANSPORT_SECURITY_TYPE); end: grpc_closure_sched(exec_ctx, on_peer_checked, error); tsi_peer_destruct(&peer); } static void fake_channel_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_auth_context **auth_context, grpc_closure *on_peer_checked) { fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked); grpc_fake_channel_security_connector *c = (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_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_auth_context **auth_context, grpc_closure *on_peer_checked) { fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked); } static void fake_channel_check_call_host(grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, const char *host, grpc_auth_context *auth_context, grpc_security_call_host_check_cb cb, void *user_data) { cb(exec_ctx, user_data, GRPC_SECURITY_OK); } static void fake_channel_add_handshakers( grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, grpc_handshake_manager *handshake_mgr) { grpc_handshake_manager_add( handshake_mgr, grpc_security_handshaker_create( exec_ctx, tsi_create_adapter_handshaker( tsi_create_fake_handshaker(true /* is_client */)), &sc->base)); } static void fake_server_add_handshakers(grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc, grpc_handshake_manager *handshake_mgr) { grpc_handshake_manager_add( handshake_mgr, grpc_security_handshaker_create( exec_ctx, tsi_create_adapter_handshaker( tsi_create_fake_handshaker(false /* is_client */)), &sc->base)); } static grpc_security_connector_vtable fake_channel_vtable = { fake_channel_destroy, fake_channel_check_peer}; static grpc_security_connector_vtable fake_server_vtable = { fake_server_destroy, fake_server_check_peer}; grpc_channel_security_connector *grpc_fake_channel_security_connector_create( grpc_call_credentials *request_metadata_creds, const char *target, const grpc_channel_args *args) { grpc_fake_channel_security_connector *c = 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.request_metadata_creds = grpc_call_credentials_ref(request_metadata_creds); c->base.check_call_host = fake_channel_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_lb_targets_info_find_in_args(args) != NULL); return &c->base; } grpc_server_security_connector *grpc_fake_server_security_connector_create( void) { grpc_server_security_connector *c = 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->add_handshakers = fake_server_add_handshakers; return c; } /* --- Ssl implementation. --- */ typedef struct { grpc_channel_security_connector base; tsi_ssl_client_handshaker_factory *handshaker_factory; char *target_name; char *overridden_target_name; } grpc_ssl_channel_security_connector; typedef struct { grpc_server_security_connector base; tsi_ssl_server_handshaker_factory *handshaker_factory; } grpc_ssl_server_security_connector; static void ssl_channel_destroy(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds); if (c->handshaker_factory != NULL) { tsi_ssl_client_handshaker_factory_destroy(c->handshaker_factory); } if (c->target_name != NULL) gpr_free(c->target_name); if (c->overridden_target_name != NULL) gpr_free(c->overridden_target_name); gpr_free(sc); } static void ssl_server_destroy(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc) { grpc_ssl_server_security_connector *c = (grpc_ssl_server_security_connector *)sc; if (c->handshaker_factory != NULL) { tsi_ssl_server_handshaker_factory_destroy(c->handshaker_factory); } gpr_free(sc); } static void ssl_channel_add_handshakers(grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, grpc_handshake_manager *handshake_mgr) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; // Instantiate TSI handshaker. tsi_handshaker *tsi_hs = NULL; tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker( c->handshaker_factory, c->overridden_target_name != NULL ? 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( exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base)); } static void ssl_server_add_handshakers(grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc, grpc_handshake_manager *handshake_mgr) { grpc_ssl_server_security_connector *c = (grpc_ssl_server_security_connector *)sc; // Instantiate TSI handshaker. tsi_handshaker *tsi_hs = NULL; tsi_result result = tsi_ssl_server_handshaker_factory_create_handshaker( c->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( exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base)); } static int ssl_host_matches_name(const tsi_peer *peer, const char *peer_name) { char *allocated_name = NULL; int r; if (strchr(peer_name, ':') != NULL) { 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; } r = tsi_ssl_peer_matches_name(peer, peer_name); gpr_free(allocated_name); return r; } grpc_auth_context *tsi_ssl_peer_to_auth_context(const tsi_peer *peer) { size_t i; grpc_auth_context *ctx = NULL; const char *peer_identity_property_name = NULL; /* The caller has checked the certificate type property. */ GPR_ASSERT(peer->property_count >= 1); ctx = grpc_auth_context_create(NULL); 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 == NULL) 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 == NULL) { 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); } } if (peer_identity_property_name != NULL) { 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) { /* Check the ALPN. */ const tsi_peer_property *p = tsi_peer_get_property_by_name(peer, TSI_SSL_ALPN_SELECTED_PROTOCOL); if (p == NULL) { 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."); } /* Check the peer name if specified. */ if (peer_name != NULL && !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 = tsi_ssl_peer_to_auth_context(peer); return GRPC_ERROR_NONE; } static void ssl_channel_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_auth_context **auth_context, grpc_closure *on_peer_checked) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; grpc_error *error = ssl_check_peer(sc, c->overridden_target_name != NULL ? c->overridden_target_name : c->target_name, &peer, auth_context); grpc_closure_sched(exec_ctx, on_peer_checked, error); tsi_peer_destruct(&peer); } static void ssl_server_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_auth_context **auth_context, grpc_closure *on_peer_checked) { grpc_error *error = ssl_check_peer(sc, NULL, &peer, auth_context); tsi_peer_destruct(&peer); grpc_closure_sched(exec_ctx, on_peer_checked, error); } 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 = (char *)tsi_prop_name; tsi_prop->value.data = prop->value; tsi_prop->value.length = prop->value_length; } tsi_peer tsi_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) != NULL) max_num_props++; if (max_num_props > 0) { peer.properties = 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)) != NULL) { 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 tsi_shallow_peer_destruct(tsi_peer *peer) { if (peer->properties != NULL) gpr_free(peer->properties); } static void ssl_channel_check_call_host(grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, const char *host, grpc_auth_context *auth_context, grpc_security_call_host_check_cb cb, void *user_data) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; grpc_security_status status = GRPC_SECURITY_ERROR; tsi_peer peer = tsi_shallow_peer_from_ssl_auth_context(auth_context); if (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 != NULL && strcmp(host, c->target_name) == 0) { status = GRPC_SECURITY_OK; } cb(exec_ctx, user_data, status); tsi_shallow_peer_destruct(&peer); } static grpc_security_connector_vtable ssl_channel_vtable = { ssl_channel_destroy, ssl_channel_check_peer}; static grpc_security_connector_vtable ssl_server_vtable = { ssl_server_destroy, ssl_server_check_peer}; /* returns a NULL terminated slice. */ static grpc_slice compute_default_pem_root_certs_once(void) { grpc_slice result = grpc_empty_slice(); /* 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 != NULL) { 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 != NULL) { char *pem_root_certs = NULL; ovrd_res = ssl_roots_override_cb(&pem_root_certs); if (ovrd_res == GRPC_SSL_ROOTS_OVERRIDE_OK) { GPR_ASSERT(pem_root_certs != NULL); result = grpc_slice_from_copied_buffer( pem_root_certs, strlen(pem_root_certs) + 1); // NULL terminator. } gpr_free(pem_root_certs); } /* Fall back to installed certs if needed. */ 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; } static grpc_slice default_pem_root_certs; static void init_default_pem_root_certs(void) { default_pem_root_certs = compute_default_pem_root_certs_once(); } grpc_slice grpc_get_default_ssl_roots_for_testing(void) { return compute_default_pem_root_certs_once(); } 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: // Is this a sane default return TSI_DONT_REQUEST_CLIENT_CERTIFICATE; } } const char *grpc_get_default_ssl_roots(void) { /* TODO(jboeuf@google.com): Maybe revisit the approach which consists in loading all the roots once for the lifetime of the process. */ static gpr_once once = GPR_ONCE_INIT; gpr_once_init(&once, init_default_pem_root_certs); return GRPC_SLICE_IS_EMPTY(default_pem_root_certs) ? NULL : (const char *)GRPC_SLICE_START_PTR(default_pem_root_certs); } grpc_security_status grpc_ssl_channel_security_connector_create( grpc_exec_ctx *exec_ctx, grpc_call_credentials *request_metadata_creds, const grpc_ssl_config *config, const char *target_name, const char *overridden_target_name, grpc_channel_security_connector **sc) { size_t num_alpn_protocols = grpc_chttp2_num_alpn_versions(); const char **alpn_protocol_strings = gpr_malloc(sizeof(const char *) * num_alpn_protocols); tsi_result result = TSI_OK; grpc_ssl_channel_security_connector *c; size_t i; const char *pem_root_certs; char *port; for (i = 0; i < num_alpn_protocols; i++) { alpn_protocol_strings[i] = grpc_chttp2_get_alpn_version_index(i); } if (config == NULL || target_name == NULL) { gpr_log(GPR_ERROR, "An ssl channel needs a config and a target name."); goto error; } if (config->pem_root_certs == NULL) { pem_root_certs = grpc_get_default_ssl_roots(); if (pem_root_certs == NULL) { gpr_log(GPR_ERROR, "Could not get default pem root certs."); goto error; } } else { pem_root_certs = config->pem_root_certs; } c = 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.request_metadata_creds = grpc_call_credentials_ref(request_metadata_creds); c->base.check_call_host = ssl_channel_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 != NULL) { c->overridden_target_name = gpr_strdup(overridden_target_name); } bool has_key_cert_pair = config->pem_key_cert_pair.private_key != NULL && config->pem_key_cert_pair.cert_chain != NULL; result = tsi_create_ssl_client_handshaker_factory( has_key_cert_pair ? &config->pem_key_cert_pair : NULL, pem_root_certs, ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols, &c->handshaker_factory); if (result != TSI_OK) { gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.", tsi_result_to_string(result)); ssl_channel_destroy(exec_ctx, &c->base.base); *sc = NULL; goto error; } *sc = &c->base; gpr_free((void *)alpn_protocol_strings); return GRPC_SECURITY_OK; error: gpr_free((void *)alpn_protocol_strings); return GRPC_SECURITY_ERROR; } grpc_security_status grpc_ssl_server_security_connector_create( grpc_exec_ctx *exec_ctx, const grpc_ssl_server_config *config, grpc_server_security_connector **sc) { size_t num_alpn_protocols = grpc_chttp2_num_alpn_versions(); const char **alpn_protocol_strings = gpr_malloc(sizeof(const char *) * num_alpn_protocols); tsi_result result = TSI_OK; grpc_ssl_server_security_connector *c; size_t i; for (i = 0; i < num_alpn_protocols; i++) { alpn_protocol_strings[i] = grpc_chttp2_get_alpn_version_index(i); } if (config == NULL || config->num_key_cert_pairs == 0) { gpr_log(GPR_ERROR, "An SSL server needs a key and a cert."); goto error; } c = 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; result = tsi_create_ssl_server_handshaker_factory_ex( config->pem_key_cert_pairs, config->num_key_cert_pairs, config->pem_root_certs, get_tsi_client_certificate_request_type( config->client_certificate_request), ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols, &c->handshaker_factory); if (result != TSI_OK) { gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.", tsi_result_to_string(result)); ssl_server_destroy(exec_ctx, &c->base.base); *sc = NULL; goto error; } c->base.add_handshakers = ssl_server_add_handshakers; *sc = &c->base; gpr_free((void *)alpn_protocol_strings); return GRPC_SECURITY_OK; error: gpr_free((void *)alpn_protocol_strings); return GRPC_SECURITY_ERROR; }