/* * * Copyright 2015-2016, 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/security_connector.h" #include #include #include #include #include #include #include #include "src/core/security/credentials.h" #include "src/core/security/handshake.h" #include "src/core/security/secure_endpoint.h" #include "src/core/security/security_context.h" #include "src/core/support/env.h" #include "src/core/support/load_file.h" #include "src/core/support/string.h" #include "src/core/transport/chttp2/alpn.h" #include "src/core/tsi/fake_transport_security.h" #include "src/core/tsi/ssl_transport_security.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-AES128-SHA256:ECDHE-RSA-AES256-" \ "SHA384: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_server_security_connector_shutdown( grpc_exec_ctx *exec_ctx, grpc_server_security_connector *connector) { grpc_security_connector_handshake_list *tmp; gpr_mu_lock(&connector->mu); while (connector->handshaking_handshakes) { tmp = connector->handshaking_handshakes; grpc_security_handshake_shutdown( exec_ctx, connector->handshaking_handshakes->handshake); connector->handshaking_handshakes = tmp->next; gpr_free(tmp); } gpr_mu_unlock(&connector->mu); } void grpc_channel_security_connector_do_handshake( grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { if (sc == NULL || nonsecure_endpoint == NULL) { cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL); } else { sc->do_handshake(exec_ctx, sc, nonsecure_endpoint, cb, user_data); } } void grpc_server_security_connector_do_handshake( grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc, grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { if (sc == NULL || nonsecure_endpoint == NULL) { cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL, NULL); } else { sc->do_handshake(exec_ctx, sc, acceptor, nonsecure_endpoint, cb, user_data); } } void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_security_peer_check_cb cb, void *user_data) { if (sc == NULL) { cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL); tsi_peer_destruct(&peer); } else { sc->vtable->check_peer(exec_ctx, sc, peer, cb, user_data); } } 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_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_security_connector *sc) { if (sc == NULL) return; #endif if (gpr_unref(&sc->refcount)) sc->vtable->destroy(sc); } static void connector_pointer_arg_destroy(void *p) { GRPC_SECURITY_CONNECTOR_UNREF(p, "connector_pointer_arg"); } static void *connector_pointer_arg_copy(void *p) { return GRPC_SECURITY_CONNECTOR_REF(p, "connector_pointer_arg"); } 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_SECURITY_CONNECTOR_ARG; 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_SECURITY_CONNECTOR_ARG)) return NULL; if (arg->type != GRPC_ARG_POINTER) { gpr_log(GPR_ERROR, "Invalid type %d for arg %s", arg->type, GRPC_SECURITY_CONNECTOR_ARG); return NULL; } return arg->value.pointer.p; } grpc_security_connector *grpc_find_security_connector_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. -- */ static void fake_channel_destroy(grpc_security_connector *sc) { grpc_channel_security_connector *c = (grpc_channel_security_connector *)sc; grpc_call_credentials_unref(c->request_metadata_creds); gpr_free(sc); } static void fake_server_destroy(grpc_security_connector *sc) { grpc_server_security_connector *c = (grpc_server_security_connector *)sc; gpr_mu_destroy(&c->mu); gpr_free(sc); } static void fake_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_security_peer_check_cb cb, void *user_data) { const char *prop_name; grpc_security_status status = GRPC_SECURITY_OK; grpc_auth_context *auth_context = NULL; if (peer.property_count != 1) { gpr_log(GPR_ERROR, "Fake peers should only have 1 property."); status = GRPC_SECURITY_ERROR; goto end; } prop_name = peer.properties[0].name; if (prop_name == NULL || strcmp(prop_name, TSI_CERTIFICATE_TYPE_PEER_PROPERTY)) { gpr_log(GPR_ERROR, "Unexpected property in fake peer: %s.", prop_name == NULL ? "" : prop_name); status = GRPC_SECURITY_ERROR; goto end; } if (strncmp(peer.properties[0].value.data, TSI_FAKE_CERTIFICATE_TYPE, peer.properties[0].value.length)) { gpr_log(GPR_ERROR, "Invalid value for cert type property."); status = GRPC_SECURITY_ERROR; 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: cb(exec_ctx, user_data, status, auth_context); grpc_auth_context_unref(auth_context); tsi_peer_destruct(&peer); } 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_do_handshake(grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { grpc_do_security_handshake(exec_ctx, tsi_create_fake_handshaker(1), &sc->base, true, nonsecure_endpoint, cb, user_data); } static void fake_server_do_handshake(grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc, grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { grpc_do_security_handshake(exec_ctx, tsi_create_fake_handshaker(0), &sc->base, false, nonsecure_endpoint, cb, user_data); } static grpc_security_connector_vtable fake_channel_vtable = { fake_channel_destroy, fake_check_peer}; static grpc_security_connector_vtable fake_server_vtable = {fake_server_destroy, fake_check_peer}; grpc_channel_security_connector *grpc_fake_channel_security_connector_create( grpc_call_credentials *request_metadata_creds) { grpc_channel_security_connector *c = gpr_malloc(sizeof(*c)); memset(c, 0, sizeof(*c)); gpr_ref_init(&c->base.refcount, 1); c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME; c->base.vtable = &fake_channel_vtable; c->request_metadata_creds = grpc_call_credentials_ref(request_metadata_creds); c->check_call_host = fake_channel_check_call_host; c->do_handshake = fake_channel_do_handshake; return c; } grpc_server_security_connector *grpc_fake_server_security_connector_create( void) { grpc_server_security_connector *c = gpr_malloc(sizeof(grpc_server_security_connector)); memset(c, 0, sizeof(*c)); gpr_ref_init(&c->base.refcount, 1); c->base.vtable = &fake_server_vtable; c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME; c->do_handshake = fake_server_do_handshake; gpr_mu_init(&c->mu); return c; } /* --- Ssl implementation. --- */ typedef struct { grpc_channel_security_connector base; tsi_ssl_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_handshaker_factory *handshaker_factory; } grpc_ssl_server_security_connector; static void ssl_channel_destroy(grpc_security_connector *sc) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; grpc_call_credentials_unref(c->base.request_metadata_creds); if (c->handshaker_factory != NULL) { tsi_ssl_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_security_connector *sc) { grpc_ssl_server_security_connector *c = (grpc_ssl_server_security_connector *)sc; if (c->handshaker_factory != NULL) { tsi_ssl_handshaker_factory_destroy(c->handshaker_factory); } gpr_mu_destroy(&c->base.mu); gpr_free(sc); } static grpc_security_status ssl_create_handshaker( tsi_ssl_handshaker_factory *handshaker_factory, bool is_client, const char *peer_name, tsi_handshaker **handshaker) { tsi_result result = TSI_OK; if (handshaker_factory == NULL) return GRPC_SECURITY_ERROR; result = tsi_ssl_handshaker_factory_create_handshaker( handshaker_factory, is_client ? peer_name : NULL, handshaker); if (result != TSI_OK) { gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.", tsi_result_to_string(result)); return GRPC_SECURITY_ERROR; } return GRPC_SECURITY_OK; } static void ssl_channel_do_handshake(grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; tsi_handshaker *handshaker; grpc_security_status status = ssl_create_handshaker( c->handshaker_factory, true, c->overridden_target_name != NULL ? c->overridden_target_name : c->target_name, &handshaker); if (status != GRPC_SECURITY_OK) { cb(exec_ctx, user_data, status, NULL, NULL); } else { grpc_do_security_handshake(exec_ctx, handshaker, &sc->base, true, nonsecure_endpoint, cb, user_data); } } static void ssl_server_do_handshake(grpc_exec_ctx *exec_ctx, grpc_server_security_connector *sc, grpc_tcp_server_acceptor *acceptor, grpc_endpoint *nonsecure_endpoint, grpc_security_handshake_done_cb cb, void *user_data) { grpc_ssl_server_security_connector *c = (grpc_ssl_server_security_connector *)sc; tsi_handshaker *handshaker; grpc_security_status status = ssl_create_handshaker(c->handshaker_factory, false, NULL, &handshaker); if (status != GRPC_SECURITY_OK) { cb(exec_ctx, user_data, status, NULL, NULL); } else { grpc_do_security_handshake(exec_ctx, handshaker, &sc->base, false, nonsecure_endpoint, cb, user_data); } } 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_security_status 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) { gpr_log(GPR_ERROR, "Missing selected ALPN property."); return GRPC_SECURITY_ERROR; } if (!grpc_chttp2_is_alpn_version_supported(p->value.data, p->value.length)) { gpr_log(GPR_ERROR, "Invalid ALPN value."); return GRPC_SECURITY_ERROR; } /* Check the peer name if specified. */ if (peer_name != NULL && !ssl_host_matches_name(peer, peer_name)) { gpr_log(GPR_ERROR, "Peer name %s is not in peer certificate", peer_name); return GRPC_SECURITY_ERROR; } *auth_context = tsi_ssl_peer_to_auth_context(peer); return GRPC_SECURITY_OK; } static void ssl_channel_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_security_peer_check_cb cb, void *user_data) { grpc_ssl_channel_security_connector *c = (grpc_ssl_channel_security_connector *)sc; grpc_security_status status; grpc_auth_context *auth_context = NULL; status = ssl_check_peer(sc, c->overridden_target_name != NULL ? c->overridden_target_name : c->target_name, &peer, &auth_context); cb(exec_ctx, user_data, status, auth_context); grpc_auth_context_unref(auth_context); tsi_peer_destruct(&peer); } static void ssl_server_check_peer(grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer, grpc_security_peer_check_cb cb, void *user_data) { grpc_auth_context *auth_context = NULL; grpc_security_status status = ssl_check_peer(sc, NULL, &peer, &auth_context); tsi_peer_destruct(&peer); cb(exec_ctx, user_data, status, auth_context); grpc_auth_context_unref(auth_context); } 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}; static gpr_slice compute_default_pem_root_certs_once(void) { gpr_slice result = gpr_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) { result = gpr_load_file(default_root_certs_path, 0, NULL); gpr_free(default_root_certs_path); } /* Try overridden roots if needed. */ grpc_ssl_roots_override_result ovrd_res = GRPC_SSL_ROOTS_OVERRIDE_FAIL; if (GPR_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 = gpr_slice_new(pem_root_certs, strlen(pem_root_certs), gpr_free); } } /* Fall back to installed certs if needed. */ if (GPR_SLICE_IS_EMPTY(result) && ovrd_res != GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY) { result = gpr_load_file(installed_roots_path, 0, NULL); } return result; } static gpr_slice default_pem_root_certs; static void init_default_pem_root_certs(void) { default_pem_root_certs = compute_default_pem_root_certs_once(); } gpr_slice grpc_get_default_ssl_roots_for_testing(void) { return compute_default_pem_root_certs_once(); } size_t grpc_get_default_ssl_roots(const unsigned char **pem_root_certs) { /* 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); *pem_root_certs = GPR_SLICE_START_PTR(default_pem_root_certs); return GPR_SLICE_LENGTH(default_pem_root_certs); } grpc_security_status grpc_ssl_channel_security_connector_create( 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 unsigned char **alpn_protocol_strings = gpr_malloc(sizeof(const char *) * num_alpn_protocols); unsigned char *alpn_protocol_string_lengths = gpr_malloc(sizeof(unsigned char) * num_alpn_protocols); tsi_result result = TSI_OK; grpc_ssl_channel_security_connector *c; size_t i; const unsigned char *pem_root_certs; size_t pem_root_certs_size; char *port; for (i = 0; i < num_alpn_protocols; i++) { alpn_protocol_strings[i] = (const unsigned char *)grpc_chttp2_get_alpn_version_index(i); alpn_protocol_string_lengths[i] = (unsigned char)strlen(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_size = grpc_get_default_ssl_roots(&pem_root_certs); if (pem_root_certs == NULL || pem_root_certs_size == 0) { gpr_log(GPR_ERROR, "Could not get default pem root certs."); goto error; } } else { pem_root_certs = config->pem_root_certs; pem_root_certs_size = config->pem_root_certs_size; } c = gpr_malloc(sizeof(grpc_ssl_channel_security_connector)); memset(c, 0, 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.do_handshake = ssl_channel_do_handshake; 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); } result = tsi_create_ssl_client_handshaker_factory( config->pem_private_key, config->pem_private_key_size, config->pem_cert_chain, config->pem_cert_chain_size, pem_root_certs, pem_root_certs_size, ssl_cipher_suites(), alpn_protocol_strings, alpn_protocol_string_lengths, (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(&c->base.base); *sc = NULL; goto error; } *sc = &c->base; gpr_free((void *)alpn_protocol_strings); gpr_free(alpn_protocol_string_lengths); return GRPC_SECURITY_OK; error: gpr_free((void *)alpn_protocol_strings); gpr_free(alpn_protocol_string_lengths); return GRPC_SECURITY_ERROR; } grpc_security_status grpc_ssl_server_security_connector_create( const grpc_ssl_server_config *config, grpc_server_security_connector **sc) { size_t num_alpn_protocols = grpc_chttp2_num_alpn_versions(); const unsigned char **alpn_protocol_strings = gpr_malloc(sizeof(const char *) * num_alpn_protocols); unsigned char *alpn_protocol_string_lengths = gpr_malloc(sizeof(unsigned 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] = (const unsigned char *)grpc_chttp2_get_alpn_version_index(i); alpn_protocol_string_lengths[i] = (unsigned char)strlen(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_malloc(sizeof(grpc_ssl_server_security_connector)); memset(c, 0, 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( (const unsigned char **)config->pem_private_keys, config->pem_private_keys_sizes, (const unsigned char **)config->pem_cert_chains, config->pem_cert_chains_sizes, config->num_key_cert_pairs, config->pem_root_certs, config->pem_root_certs_size, config->force_client_auth, ssl_cipher_suites(), alpn_protocol_strings, alpn_protocol_string_lengths, (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(&c->base.base); *sc = NULL; goto error; } gpr_mu_init(&c->base.mu); c->base.do_handshake = ssl_server_do_handshake; *sc = &c->base; gpr_free((void *)alpn_protocol_strings); gpr_free(alpn_protocol_string_lengths); return GRPC_SECURITY_OK; error: gpr_free((void *)alpn_protocol_strings); gpr_free(alpn_protocol_string_lengths); return GRPC_SECURITY_ERROR; }