/* * * 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/credentials.h" #include #include #include "src/core/channel/channel_args.h" #include "src/core/channel/http_client_filter.h" #include "src/core/httpcli/httpcli.h" #include "src/core/iomgr/executor.h" #include "src/core/json/json.h" #include "src/core/support/string.h" #include "src/core/surface/api_trace.h" #include #include #include #include #include /* -- Common. -- */ struct grpc_credentials_metadata_request { grpc_call_credentials *creds; grpc_credentials_metadata_cb cb; void *user_data; }; static grpc_credentials_metadata_request * grpc_credentials_metadata_request_create(grpc_call_credentials *creds, grpc_credentials_metadata_cb cb, void *user_data) { grpc_credentials_metadata_request *r = gpr_malloc(sizeof(grpc_credentials_metadata_request)); r->creds = grpc_call_credentials_ref(creds); r->cb = cb; r->user_data = user_data; return r; } static void grpc_credentials_metadata_request_destroy( grpc_credentials_metadata_request *r) { grpc_call_credentials_unref(r->creds); gpr_free(r); } grpc_channel_credentials *grpc_channel_credentials_ref( grpc_channel_credentials *creds) { if (creds == NULL) return NULL; gpr_ref(&creds->refcount); return creds; } void grpc_channel_credentials_unref(grpc_channel_credentials *creds) { if (creds == NULL) return; if (gpr_unref(&creds->refcount)) { if (creds->vtable->destruct != NULL) creds->vtable->destruct(creds); gpr_free(creds); } } void grpc_channel_credentials_release(grpc_channel_credentials *creds) { GRPC_API_TRACE("grpc_channel_credentials_release(creds=%p)", 1, (creds)); grpc_channel_credentials_unref(creds); } grpc_call_credentials *grpc_call_credentials_ref(grpc_call_credentials *creds) { if (creds == NULL) return NULL; gpr_ref(&creds->refcount); return creds; } void grpc_call_credentials_unref(grpc_call_credentials *creds) { if (creds == NULL) return; if (gpr_unref(&creds->refcount)) { if (creds->vtable->destruct != NULL) creds->vtable->destruct(creds); gpr_free(creds); } } void grpc_call_credentials_release(grpc_call_credentials *creds) { GRPC_API_TRACE("grpc_call_credentials_release(creds=%p)", 1, (creds)); grpc_call_credentials_unref(creds); } void grpc_call_credentials_get_request_metadata( grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { if (creds == NULL || creds->vtable->get_request_metadata == NULL) { if (cb != NULL) { cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK); } return; } creds->vtable->get_request_metadata(exec_ctx, creds, pollset, context, cb, user_data); } grpc_security_status grpc_channel_credentials_create_security_connector( grpc_channel_credentials *channel_creds, const char *target, const grpc_channel_args *args, grpc_channel_security_connector **sc, grpc_channel_args **new_args) { *new_args = NULL; if (channel_creds == NULL) { return GRPC_SECURITY_ERROR; } GPR_ASSERT(channel_creds->vtable->create_security_connector != NULL); return channel_creds->vtable->create_security_connector( channel_creds, NULL, target, args, sc, new_args); } grpc_server_credentials *grpc_server_credentials_ref( grpc_server_credentials *creds) { if (creds == NULL) return NULL; gpr_ref(&creds->refcount); return creds; } void grpc_server_credentials_unref(grpc_server_credentials *creds) { if (creds == NULL) return; if (gpr_unref(&creds->refcount)) { if (creds->vtable->destruct != NULL) creds->vtable->destruct(creds); if (creds->processor.destroy != NULL && creds->processor.state != NULL) { creds->processor.destroy(creds->processor.state); } gpr_free(creds); } } void grpc_server_credentials_release(grpc_server_credentials *creds) { GRPC_API_TRACE("grpc_server_credentials_release(creds=%p)", 1, (creds)); grpc_server_credentials_unref(creds); } grpc_security_status grpc_server_credentials_create_security_connector( grpc_server_credentials *creds, grpc_security_connector **sc) { if (creds == NULL || creds->vtable->create_security_connector == NULL) { gpr_log(GPR_ERROR, "Server credentials cannot create security context."); return GRPC_SECURITY_ERROR; } return creds->vtable->create_security_connector(creds, sc); } void grpc_server_credentials_set_auth_metadata_processor( grpc_server_credentials *creds, grpc_auth_metadata_processor processor) { GRPC_API_TRACE( "grpc_server_credentials_set_auth_metadata_processor(" "creds=%p, " "processor=grpc_auth_metadata_processor { process: %p, state: %p })", 3, (creds, (void *)(intptr_t)processor.process, processor.state)); if (creds == NULL) return; if (creds->processor.destroy != NULL && creds->processor.state != NULL) { creds->processor.destroy(creds->processor.state); } creds->processor = processor; } static void server_credentials_pointer_arg_destroy(void *p) { grpc_server_credentials_unref(p); } static void *server_credentials_pointer_arg_copy(void *p) { return grpc_server_credentials_ref(p); } static int server_credentials_pointer_cmp(void *a, void *b) { return GPR_ICMP(a, b); } static const grpc_arg_pointer_vtable cred_ptr_vtable = { server_credentials_pointer_arg_copy, server_credentials_pointer_arg_destroy, server_credentials_pointer_cmp }; grpc_arg grpc_server_credentials_to_arg(grpc_server_credentials *p) { grpc_arg arg; memset(&arg, 0, sizeof(grpc_arg)); arg.type = GRPC_ARG_POINTER; arg.key = GRPC_SERVER_CREDENTIALS_ARG; arg.value.pointer.p = p; arg.value.pointer.vtable = &cred_ptr_vtable; return arg; } grpc_server_credentials *grpc_server_credentials_from_arg(const grpc_arg *arg) { if (strcmp(arg->key, GRPC_SERVER_CREDENTIALS_ARG) != 0) return NULL; if (arg->type != GRPC_ARG_POINTER) { gpr_log(GPR_ERROR, "Invalid type %d for arg %s", arg->type, GRPC_SERVER_CREDENTIALS_ARG); return NULL; } return arg->value.pointer.p; } grpc_server_credentials *grpc_find_server_credentials_in_args( const grpc_channel_args *args) { size_t i; if (args == NULL) return NULL; for (i = 0; i < args->num_args; i++) { grpc_server_credentials *p = grpc_server_credentials_from_arg(&args->args[i]); if (p != NULL) return p; } return NULL; } /* -- Ssl credentials. -- */ static void ssl_destruct(grpc_channel_credentials *creds) { grpc_ssl_credentials *c = (grpc_ssl_credentials *)creds; if (c->config.pem_root_certs != NULL) gpr_free(c->config.pem_root_certs); if (c->config.pem_private_key != NULL) gpr_free(c->config.pem_private_key); if (c->config.pem_cert_chain != NULL) gpr_free(c->config.pem_cert_chain); } static void ssl_server_destruct(grpc_server_credentials *creds) { grpc_ssl_server_credentials *c = (grpc_ssl_server_credentials *)creds; size_t i; for (i = 0; i < c->config.num_key_cert_pairs; i++) { if (c->config.pem_private_keys[i] != NULL) { gpr_free(c->config.pem_private_keys[i]); } if (c->config.pem_cert_chains[i] != NULL) { gpr_free(c->config.pem_cert_chains[i]); } } if (c->config.pem_private_keys != NULL) gpr_free(c->config.pem_private_keys); if (c->config.pem_private_keys_sizes != NULL) { gpr_free(c->config.pem_private_keys_sizes); } if (c->config.pem_cert_chains != NULL) gpr_free(c->config.pem_cert_chains); if (c->config.pem_cert_chains_sizes != NULL) { gpr_free(c->config.pem_cert_chains_sizes); } if (c->config.pem_root_certs != NULL) gpr_free(c->config.pem_root_certs); } static grpc_security_status ssl_create_security_connector( grpc_channel_credentials *creds, grpc_call_credentials *call_creds, const char *target, const grpc_channel_args *args, grpc_channel_security_connector **sc, grpc_channel_args **new_args) { grpc_ssl_credentials *c = (grpc_ssl_credentials *)creds; grpc_security_status status = GRPC_SECURITY_OK; size_t i = 0; const char *overridden_target_name = NULL; grpc_arg new_arg; for (i = 0; args && i < args->num_args; i++) { grpc_arg *arg = &args->args[i]; if (strcmp(arg->key, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG) == 0 && arg->type == GRPC_ARG_STRING) { overridden_target_name = arg->value.string; break; } } status = grpc_ssl_channel_security_connector_create( call_creds, &c->config, target, overridden_target_name, sc); if (status != GRPC_SECURITY_OK) { return status; } new_arg.type = GRPC_ARG_STRING; new_arg.key = GRPC_ARG_HTTP2_SCHEME; new_arg.value.string = "https"; *new_args = grpc_channel_args_copy_and_add(args, &new_arg, 1); return status; } static grpc_security_status ssl_server_create_security_connector( grpc_server_credentials *creds, grpc_security_connector **sc) { grpc_ssl_server_credentials *c = (grpc_ssl_server_credentials *)creds; return grpc_ssl_server_security_connector_create(&c->config, sc); } static grpc_channel_credentials_vtable ssl_vtable = { ssl_destruct, ssl_create_security_connector}; static grpc_server_credentials_vtable ssl_server_vtable = { ssl_server_destruct, ssl_server_create_security_connector}; static void ssl_copy_key_material(const char *input, unsigned char **output, size_t *output_size) { *output_size = strlen(input); *output = gpr_malloc(*output_size); memcpy(*output, input, *output_size); } static void ssl_build_config(const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair, grpc_ssl_config *config) { if (pem_root_certs != NULL) { ssl_copy_key_material(pem_root_certs, &config->pem_root_certs, &config->pem_root_certs_size); } if (pem_key_cert_pair != NULL) { GPR_ASSERT(pem_key_cert_pair->private_key != NULL); GPR_ASSERT(pem_key_cert_pair->cert_chain != NULL); ssl_copy_key_material(pem_key_cert_pair->private_key, &config->pem_private_key, &config->pem_private_key_size); ssl_copy_key_material(pem_key_cert_pair->cert_chain, &config->pem_cert_chain, &config->pem_cert_chain_size); } } static void ssl_build_server_config( const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs, size_t num_key_cert_pairs, int force_client_auth, grpc_ssl_server_config *config) { size_t i; config->force_client_auth = force_client_auth; if (pem_root_certs != NULL) { ssl_copy_key_material(pem_root_certs, &config->pem_root_certs, &config->pem_root_certs_size); } if (num_key_cert_pairs > 0) { GPR_ASSERT(pem_key_cert_pairs != NULL); config->pem_private_keys = gpr_malloc(num_key_cert_pairs * sizeof(unsigned char *)); config->pem_cert_chains = gpr_malloc(num_key_cert_pairs * sizeof(unsigned char *)); config->pem_private_keys_sizes = gpr_malloc(num_key_cert_pairs * sizeof(size_t)); config->pem_cert_chains_sizes = gpr_malloc(num_key_cert_pairs * sizeof(size_t)); } config->num_key_cert_pairs = num_key_cert_pairs; for (i = 0; i < num_key_cert_pairs; i++) { GPR_ASSERT(pem_key_cert_pairs[i].private_key != NULL); GPR_ASSERT(pem_key_cert_pairs[i].cert_chain != NULL); ssl_copy_key_material(pem_key_cert_pairs[i].private_key, &config->pem_private_keys[i], &config->pem_private_keys_sizes[i]); ssl_copy_key_material(pem_key_cert_pairs[i].cert_chain, &config->pem_cert_chains[i], &config->pem_cert_chains_sizes[i]); } } grpc_channel_credentials *grpc_ssl_credentials_create( const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair, void *reserved) { grpc_ssl_credentials *c = gpr_malloc(sizeof(grpc_ssl_credentials)); GRPC_API_TRACE( "grpc_ssl_credentials_create(pem_root_certs=%s, " "pem_key_cert_pair=%p, " "reserved=%p)", 3, (pem_root_certs, pem_key_cert_pair, reserved)); GPR_ASSERT(reserved == NULL); memset(c, 0, sizeof(grpc_ssl_credentials)); c->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_SSL; c->base.vtable = &ssl_vtable; gpr_ref_init(&c->base.refcount, 1); ssl_build_config(pem_root_certs, pem_key_cert_pair, &c->config); return &c->base; } grpc_server_credentials *grpc_ssl_server_credentials_create( const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs, size_t num_key_cert_pairs, int force_client_auth, void *reserved) { grpc_ssl_server_credentials *c = gpr_malloc(sizeof(grpc_ssl_server_credentials)); GRPC_API_TRACE( "grpc_ssl_server_credentials_create(" "pem_root_certs=%s, pem_key_cert_pairs=%p, num_key_cert_pairs=%lu, " "force_client_auth=%d, reserved=%p)", 5, (pem_root_certs, pem_key_cert_pairs, (unsigned long)num_key_cert_pairs, force_client_auth, reserved)); GPR_ASSERT(reserved == NULL); memset(c, 0, sizeof(grpc_ssl_server_credentials)); c->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_SSL; gpr_ref_init(&c->base.refcount, 1); c->base.vtable = &ssl_server_vtable; ssl_build_server_config(pem_root_certs, pem_key_cert_pairs, num_key_cert_pairs, force_client_auth, &c->config); return &c->base; } /* -- Jwt credentials -- */ static void jwt_reset_cache(grpc_service_account_jwt_access_credentials *c) { if (c->cached.jwt_md != NULL) { grpc_credentials_md_store_unref(c->cached.jwt_md); c->cached.jwt_md = NULL; } if (c->cached.service_url != NULL) { gpr_free(c->cached.service_url); c->cached.service_url = NULL; } c->cached.jwt_expiration = gpr_inf_past(GPR_CLOCK_REALTIME); } static void jwt_destruct(grpc_call_credentials *creds) { grpc_service_account_jwt_access_credentials *c = (grpc_service_account_jwt_access_credentials *)creds; grpc_auth_json_key_destruct(&c->key); jwt_reset_cache(c); gpr_mu_destroy(&c->cache_mu); } static void jwt_get_request_metadata(grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_service_account_jwt_access_credentials *c = (grpc_service_account_jwt_access_credentials *)creds; gpr_timespec refresh_threshold = gpr_time_from_seconds( GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS, GPR_TIMESPAN); /* See if we can return a cached jwt. */ grpc_credentials_md_store *jwt_md = NULL; { gpr_mu_lock(&c->cache_mu); if (c->cached.service_url != NULL && strcmp(c->cached.service_url, context.service_url) == 0 && c->cached.jwt_md != NULL && (gpr_time_cmp(gpr_time_sub(c->cached.jwt_expiration, gpr_now(GPR_CLOCK_REALTIME)), refresh_threshold) > 0)) { jwt_md = grpc_credentials_md_store_ref(c->cached.jwt_md); } gpr_mu_unlock(&c->cache_mu); } if (jwt_md == NULL) { char *jwt = NULL; /* Generate a new jwt. */ gpr_mu_lock(&c->cache_mu); jwt_reset_cache(c); jwt = grpc_jwt_encode_and_sign(&c->key, context.service_url, c->jwt_lifetime, NULL); if (jwt != NULL) { char *md_value; gpr_asprintf(&md_value, "Bearer %s", jwt); gpr_free(jwt); c->cached.jwt_expiration = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), c->jwt_lifetime); c->cached.service_url = gpr_strdup(context.service_url); c->cached.jwt_md = grpc_credentials_md_store_create(1); grpc_credentials_md_store_add_cstrings( c->cached.jwt_md, GRPC_AUTHORIZATION_METADATA_KEY, md_value); gpr_free(md_value); jwt_md = grpc_credentials_md_store_ref(c->cached.jwt_md); } gpr_mu_unlock(&c->cache_mu); } if (jwt_md != NULL) { cb(exec_ctx, user_data, jwt_md->entries, jwt_md->num_entries, GRPC_CREDENTIALS_OK); grpc_credentials_md_store_unref(jwt_md); } else { cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR); } } static grpc_call_credentials_vtable jwt_vtable = {jwt_destruct, jwt_get_request_metadata}; grpc_call_credentials * grpc_service_account_jwt_access_credentials_create_from_auth_json_key( grpc_auth_json_key key, gpr_timespec token_lifetime) { grpc_service_account_jwt_access_credentials *c; if (!grpc_auth_json_key_is_valid(&key)) { gpr_log(GPR_ERROR, "Invalid input for jwt credentials creation"); return NULL; } c = gpr_malloc(sizeof(grpc_service_account_jwt_access_credentials)); memset(c, 0, sizeof(grpc_service_account_jwt_access_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_JWT; gpr_ref_init(&c->base.refcount, 1); c->base.vtable = &jwt_vtable; c->key = key; c->jwt_lifetime = token_lifetime; gpr_mu_init(&c->cache_mu); jwt_reset_cache(c); return &c->base; } grpc_call_credentials *grpc_service_account_jwt_access_credentials_create( const char *json_key, gpr_timespec token_lifetime, void *reserved) { GRPC_API_TRACE( "grpc_service_account_jwt_access_credentials_create(" "json_key=%s, " "token_lifetime=" "gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, " "reserved=%p)", 5, (json_key, (long long)token_lifetime.tv_sec, (int)token_lifetime.tv_nsec, (int)token_lifetime.clock_type, reserved)); GPR_ASSERT(reserved == NULL); return grpc_service_account_jwt_access_credentials_create_from_auth_json_key( grpc_auth_json_key_create_from_string(json_key), token_lifetime); } /* -- Oauth2TokenFetcher credentials -- */ static void oauth2_token_fetcher_destruct(grpc_call_credentials *creds) { grpc_oauth2_token_fetcher_credentials *c = (grpc_oauth2_token_fetcher_credentials *)creds; grpc_credentials_md_store_unref(c->access_token_md); gpr_mu_destroy(&c->mu); grpc_httpcli_context_destroy(&c->httpcli_context); } grpc_credentials_status grpc_oauth2_token_fetcher_credentials_parse_server_response( const grpc_httpcli_response *response, grpc_credentials_md_store **token_md, gpr_timespec *token_lifetime) { char *null_terminated_body = NULL; char *new_access_token = NULL; grpc_credentials_status status = GRPC_CREDENTIALS_OK; grpc_json *json = NULL; if (response == NULL) { gpr_log(GPR_ERROR, "Received NULL response."); status = GRPC_CREDENTIALS_ERROR; goto end; } if (response->body_length > 0) { null_terminated_body = gpr_malloc(response->body_length + 1); null_terminated_body[response->body_length] = '\0'; memcpy(null_terminated_body, response->body, response->body_length); } if (response->status != 200) { gpr_log(GPR_ERROR, "Call to http server ended with error %d [%s].", response->status, null_terminated_body != NULL ? null_terminated_body : ""); status = GRPC_CREDENTIALS_ERROR; goto end; } else { grpc_json *access_token = NULL; grpc_json *token_type = NULL; grpc_json *expires_in = NULL; grpc_json *ptr; json = grpc_json_parse_string(null_terminated_body); if (json == NULL) { gpr_log(GPR_ERROR, "Could not parse JSON from %s", null_terminated_body); status = GRPC_CREDENTIALS_ERROR; goto end; } if (json->type != GRPC_JSON_OBJECT) { gpr_log(GPR_ERROR, "Response should be a JSON object"); status = GRPC_CREDENTIALS_ERROR; goto end; } for (ptr = json->child; ptr; ptr = ptr->next) { if (strcmp(ptr->key, "access_token") == 0) { access_token = ptr; } else if (strcmp(ptr->key, "token_type") == 0) { token_type = ptr; } else if (strcmp(ptr->key, "expires_in") == 0) { expires_in = ptr; } } if (access_token == NULL || access_token->type != GRPC_JSON_STRING) { gpr_log(GPR_ERROR, "Missing or invalid access_token in JSON."); status = GRPC_CREDENTIALS_ERROR; goto end; } if (token_type == NULL || token_type->type != GRPC_JSON_STRING) { gpr_log(GPR_ERROR, "Missing or invalid token_type in JSON."); status = GRPC_CREDENTIALS_ERROR; goto end; } if (expires_in == NULL || expires_in->type != GRPC_JSON_NUMBER) { gpr_log(GPR_ERROR, "Missing or invalid expires_in in JSON."); status = GRPC_CREDENTIALS_ERROR; goto end; } gpr_asprintf(&new_access_token, "%s %s", token_type->value, access_token->value); token_lifetime->tv_sec = strtol(expires_in->value, NULL, 10); token_lifetime->tv_nsec = 0; token_lifetime->clock_type = GPR_TIMESPAN; if (*token_md != NULL) grpc_credentials_md_store_unref(*token_md); *token_md = grpc_credentials_md_store_create(1); grpc_credentials_md_store_add_cstrings( *token_md, GRPC_AUTHORIZATION_METADATA_KEY, new_access_token); status = GRPC_CREDENTIALS_OK; } end: if (status != GRPC_CREDENTIALS_OK && (*token_md != NULL)) { grpc_credentials_md_store_unref(*token_md); *token_md = NULL; } if (null_terminated_body != NULL) gpr_free(null_terminated_body); if (new_access_token != NULL) gpr_free(new_access_token); if (json != NULL) grpc_json_destroy(json); return status; } static void on_oauth2_token_fetcher_http_response( grpc_exec_ctx *exec_ctx, void *user_data, const grpc_httpcli_response *response) { grpc_credentials_metadata_request *r = (grpc_credentials_metadata_request *)user_data; grpc_oauth2_token_fetcher_credentials *c = (grpc_oauth2_token_fetcher_credentials *)r->creds; gpr_timespec token_lifetime; grpc_credentials_status status; gpr_mu_lock(&c->mu); status = grpc_oauth2_token_fetcher_credentials_parse_server_response( response, &c->access_token_md, &token_lifetime); if (status == GRPC_CREDENTIALS_OK) { c->token_expiration = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), token_lifetime); r->cb(exec_ctx, r->user_data, c->access_token_md->entries, c->access_token_md->num_entries, status); } else { c->token_expiration = gpr_inf_past(GPR_CLOCK_REALTIME); r->cb(exec_ctx, r->user_data, NULL, 0, status); } gpr_mu_unlock(&c->mu); grpc_credentials_metadata_request_destroy(r); } static void oauth2_token_fetcher_get_request_metadata( grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_oauth2_token_fetcher_credentials *c = (grpc_oauth2_token_fetcher_credentials *)creds; gpr_timespec refresh_threshold = gpr_time_from_seconds( GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS, GPR_TIMESPAN); grpc_credentials_md_store *cached_access_token_md = NULL; { gpr_mu_lock(&c->mu); if (c->access_token_md != NULL && (gpr_time_cmp( gpr_time_sub(c->token_expiration, gpr_now(GPR_CLOCK_REALTIME)), refresh_threshold) > 0)) { cached_access_token_md = grpc_credentials_md_store_ref(c->access_token_md); } gpr_mu_unlock(&c->mu); } if (cached_access_token_md != NULL) { cb(exec_ctx, user_data, cached_access_token_md->entries, cached_access_token_md->num_entries, GRPC_CREDENTIALS_OK); grpc_credentials_md_store_unref(cached_access_token_md); } else { c->fetch_func( exec_ctx, grpc_credentials_metadata_request_create(creds, cb, user_data), &c->httpcli_context, pollset, on_oauth2_token_fetcher_http_response, gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), refresh_threshold)); } } static void init_oauth2_token_fetcher(grpc_oauth2_token_fetcher_credentials *c, grpc_fetch_oauth2_func fetch_func) { memset(c, 0, sizeof(grpc_oauth2_token_fetcher_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2; gpr_ref_init(&c->base.refcount, 1); gpr_mu_init(&c->mu); c->token_expiration = gpr_inf_past(GPR_CLOCK_REALTIME); c->fetch_func = fetch_func; grpc_httpcli_context_init(&c->httpcli_context); } /* -- GoogleComputeEngine credentials. -- */ static grpc_call_credentials_vtable compute_engine_vtable = { oauth2_token_fetcher_destruct, oauth2_token_fetcher_get_request_metadata}; static void compute_engine_fetch_oauth2( grpc_exec_ctx *exec_ctx, grpc_credentials_metadata_request *metadata_req, grpc_httpcli_context *httpcli_context, grpc_pollset *pollset, grpc_httpcli_response_cb response_cb, gpr_timespec deadline) { grpc_httpcli_header header = {"Metadata-Flavor", "Google"}; grpc_httpcli_request request; memset(&request, 0, sizeof(grpc_httpcli_request)); request.host = GRPC_COMPUTE_ENGINE_METADATA_HOST; request.path = GRPC_COMPUTE_ENGINE_METADATA_TOKEN_PATH; request.hdr_count = 1; request.hdrs = &header; grpc_httpcli_get(exec_ctx, httpcli_context, pollset, &request, deadline, response_cb, metadata_req); } grpc_call_credentials *grpc_google_compute_engine_credentials_create( void *reserved) { grpc_oauth2_token_fetcher_credentials *c = gpr_malloc(sizeof(grpc_oauth2_token_fetcher_credentials)); GRPC_API_TRACE("grpc_compute_engine_credentials_create(reserved=%p)", 1, (reserved)); GPR_ASSERT(reserved == NULL); init_oauth2_token_fetcher(c, compute_engine_fetch_oauth2); c->base.vtable = &compute_engine_vtable; return &c->base; } /* -- GoogleRefreshToken credentials. -- */ static void refresh_token_destruct(grpc_call_credentials *creds) { grpc_google_refresh_token_credentials *c = (grpc_google_refresh_token_credentials *)creds; grpc_auth_refresh_token_destruct(&c->refresh_token); oauth2_token_fetcher_destruct(&c->base.base); } static grpc_call_credentials_vtable refresh_token_vtable = { refresh_token_destruct, oauth2_token_fetcher_get_request_metadata}; static void refresh_token_fetch_oauth2( grpc_exec_ctx *exec_ctx, grpc_credentials_metadata_request *metadata_req, grpc_httpcli_context *httpcli_context, grpc_pollset *pollset, grpc_httpcli_response_cb response_cb, gpr_timespec deadline) { grpc_google_refresh_token_credentials *c = (grpc_google_refresh_token_credentials *)metadata_req->creds; grpc_httpcli_header header = {"Content-Type", "application/x-www-form-urlencoded"}; grpc_httpcli_request request; char *body = NULL; gpr_asprintf(&body, GRPC_REFRESH_TOKEN_POST_BODY_FORMAT_STRING, c->refresh_token.client_id, c->refresh_token.client_secret, c->refresh_token.refresh_token); memset(&request, 0, sizeof(grpc_httpcli_request)); request.host = GRPC_GOOGLE_OAUTH2_SERVICE_HOST; request.path = GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH; request.hdr_count = 1; request.hdrs = &header; request.handshaker = &grpc_httpcli_ssl; grpc_httpcli_post(exec_ctx, httpcli_context, pollset, &request, body, strlen(body), deadline, response_cb, metadata_req); gpr_free(body); } grpc_call_credentials * grpc_refresh_token_credentials_create_from_auth_refresh_token( grpc_auth_refresh_token refresh_token) { grpc_google_refresh_token_credentials *c; if (!grpc_auth_refresh_token_is_valid(&refresh_token)) { gpr_log(GPR_ERROR, "Invalid input for refresh token credentials creation"); return NULL; } c = gpr_malloc(sizeof(grpc_google_refresh_token_credentials)); memset(c, 0, sizeof(grpc_google_refresh_token_credentials)); init_oauth2_token_fetcher(&c->base, refresh_token_fetch_oauth2); c->base.base.vtable = &refresh_token_vtable; c->refresh_token = refresh_token; return &c->base.base; } grpc_call_credentials *grpc_google_refresh_token_credentials_create( const char *json_refresh_token, void *reserved) { GRPC_API_TRACE( "grpc_refresh_token_credentials_create(json_refresh_token=%s, " "reserved=%p)", 2, (json_refresh_token, reserved)); GPR_ASSERT(reserved == NULL); return grpc_refresh_token_credentials_create_from_auth_refresh_token( grpc_auth_refresh_token_create_from_string(json_refresh_token)); } /* -- Metadata-only credentials. -- */ static void md_only_test_destruct(grpc_call_credentials *creds) { grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)creds; grpc_credentials_md_store_unref(c->md_store); } static void on_simulated_token_fetch_done(grpc_exec_ctx *exec_ctx, void *user_data, int success) { grpc_credentials_metadata_request *r = (grpc_credentials_metadata_request *)user_data; grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)r->creds; r->cb(exec_ctx, r->user_data, c->md_store->entries, c->md_store->num_entries, GRPC_CREDENTIALS_OK); grpc_credentials_metadata_request_destroy(r); } static void md_only_test_get_request_metadata( grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)creds; if (c->is_async) { grpc_credentials_metadata_request *cb_arg = grpc_credentials_metadata_request_create(creds, cb, user_data); grpc_executor_enqueue( grpc_closure_create(on_simulated_token_fetch_done, cb_arg), 1); } else { cb(exec_ctx, user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK); } } static grpc_call_credentials_vtable md_only_test_vtable = { md_only_test_destruct, md_only_test_get_request_metadata}; grpc_call_credentials *grpc_md_only_test_credentials_create( const char *md_key, const char *md_value, int is_async) { grpc_md_only_test_credentials *c = gpr_malloc(sizeof(grpc_md_only_test_credentials)); memset(c, 0, sizeof(grpc_md_only_test_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2; c->base.vtable = &md_only_test_vtable; gpr_ref_init(&c->base.refcount, 1); c->md_store = grpc_credentials_md_store_create(1); grpc_credentials_md_store_add_cstrings(c->md_store, md_key, md_value); c->is_async = is_async; return &c->base; } /* -- Oauth2 Access Token credentials. -- */ static void access_token_destruct(grpc_call_credentials *creds) { grpc_access_token_credentials *c = (grpc_access_token_credentials *)creds; grpc_credentials_md_store_unref(c->access_token_md); } static void access_token_get_request_metadata( grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_access_token_credentials *c = (grpc_access_token_credentials *)creds; cb(exec_ctx, user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK); } static grpc_call_credentials_vtable access_token_vtable = { access_token_destruct, access_token_get_request_metadata}; grpc_call_credentials *grpc_access_token_credentials_create( const char *access_token, void *reserved) { grpc_access_token_credentials *c = gpr_malloc(sizeof(grpc_access_token_credentials)); char *token_md_value; GRPC_API_TRACE( "grpc_access_token_credentials_create(access_token=%s, " "reserved=%p)", 2, (access_token, reserved)); GPR_ASSERT(reserved == NULL); memset(c, 0, sizeof(grpc_access_token_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2; c->base.vtable = &access_token_vtable; gpr_ref_init(&c->base.refcount, 1); c->access_token_md = grpc_credentials_md_store_create(1); gpr_asprintf(&token_md_value, "Bearer %s", access_token); grpc_credentials_md_store_add_cstrings( c->access_token_md, GRPC_AUTHORIZATION_METADATA_KEY, token_md_value); gpr_free(token_md_value); return &c->base; } /* -- Fake transport security credentials. -- */ static grpc_security_status fake_transport_security_create_security_connector( grpc_channel_credentials *c, grpc_call_credentials *call_creds, const char *target, const grpc_channel_args *args, grpc_channel_security_connector **sc, grpc_channel_args **new_args) { *sc = grpc_fake_channel_security_connector_create(call_creds); return GRPC_SECURITY_OK; } static grpc_security_status fake_transport_security_server_create_security_connector( grpc_server_credentials *c, grpc_security_connector **sc) { *sc = grpc_fake_server_security_connector_create(); return GRPC_SECURITY_OK; } static grpc_channel_credentials_vtable fake_transport_security_credentials_vtable = { NULL, fake_transport_security_create_security_connector}; static grpc_server_credentials_vtable fake_transport_security_server_credentials_vtable = { NULL, fake_transport_security_server_create_security_connector}; grpc_channel_credentials *grpc_fake_transport_security_credentials_create( void) { grpc_channel_credentials *c = gpr_malloc(sizeof(grpc_channel_credentials)); memset(c, 0, sizeof(grpc_channel_credentials)); c->type = GRPC_CHANNEL_CREDENTIALS_TYPE_FAKE_TRANSPORT_SECURITY; c->vtable = &fake_transport_security_credentials_vtable; gpr_ref_init(&c->refcount, 1); return c; } grpc_server_credentials *grpc_fake_transport_security_server_credentials_create( void) { grpc_server_credentials *c = gpr_malloc(sizeof(grpc_server_credentials)); memset(c, 0, sizeof(grpc_server_credentials)); c->type = GRPC_CHANNEL_CREDENTIALS_TYPE_FAKE_TRANSPORT_SECURITY; gpr_ref_init(&c->refcount, 1); c->vtable = &fake_transport_security_server_credentials_vtable; return c; } /* -- Composite call credentials. -- */ typedef struct { grpc_composite_call_credentials *composite_creds; size_t creds_index; grpc_credentials_md_store *md_elems; grpc_auth_metadata_context auth_md_context; void *user_data; grpc_pollset *pollset; grpc_credentials_metadata_cb cb; } grpc_composite_call_credentials_metadata_context; static void composite_call_destruct(grpc_call_credentials *creds) { grpc_composite_call_credentials *c = (grpc_composite_call_credentials *)creds; size_t i; for (i = 0; i < c->inner.num_creds; i++) { grpc_call_credentials_unref(c->inner.creds_array[i]); } gpr_free(c->inner.creds_array); } static void composite_call_md_context_destroy( grpc_composite_call_credentials_metadata_context *ctx) { grpc_credentials_md_store_unref(ctx->md_elems); gpr_free(ctx); } static void composite_call_metadata_cb(grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems, size_t num_md, grpc_credentials_status status) { grpc_composite_call_credentials_metadata_context *ctx = (grpc_composite_call_credentials_metadata_context *)user_data; if (status != GRPC_CREDENTIALS_OK) { ctx->cb(exec_ctx, ctx->user_data, NULL, 0, status); return; } /* Copy the metadata in the context. */ if (num_md > 0) { size_t i; for (i = 0; i < num_md; i++) { grpc_credentials_md_store_add(ctx->md_elems, md_elems[i].key, md_elems[i].value); } } /* See if we need to get some more metadata. */ if (ctx->creds_index < ctx->composite_creds->inner.num_creds) { grpc_call_credentials *inner_creds = ctx->composite_creds->inner.creds_array[ctx->creds_index++]; grpc_call_credentials_get_request_metadata( exec_ctx, inner_creds, ctx->pollset, ctx->auth_md_context, composite_call_metadata_cb, ctx); return; } /* We're done!. */ ctx->cb(exec_ctx, ctx->user_data, ctx->md_elems->entries, ctx->md_elems->num_entries, GRPC_CREDENTIALS_OK); composite_call_md_context_destroy(ctx); } static void composite_call_get_request_metadata( grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context auth_md_context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_composite_call_credentials *c = (grpc_composite_call_credentials *)creds; grpc_composite_call_credentials_metadata_context *ctx; ctx = gpr_malloc(sizeof(grpc_composite_call_credentials_metadata_context)); memset(ctx, 0, sizeof(grpc_composite_call_credentials_metadata_context)); ctx->auth_md_context = auth_md_context; ctx->user_data = user_data; ctx->cb = cb; ctx->composite_creds = c; ctx->pollset = pollset; ctx->md_elems = grpc_credentials_md_store_create(c->inner.num_creds); grpc_call_credentials_get_request_metadata( exec_ctx, c->inner.creds_array[ctx->creds_index++], pollset, auth_md_context, composite_call_metadata_cb, ctx); } static grpc_call_credentials_vtable composite_call_credentials_vtable = { composite_call_destruct, composite_call_get_request_metadata}; static grpc_call_credentials_array get_creds_array( grpc_call_credentials **creds_addr) { grpc_call_credentials_array result; grpc_call_credentials *creds = *creds_addr; result.creds_array = creds_addr; result.num_creds = 1; if (strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0) { result = *grpc_composite_call_credentials_get_credentials(creds); } return result; } grpc_call_credentials *grpc_composite_call_credentials_create( grpc_call_credentials *creds1, grpc_call_credentials *creds2, void *reserved) { size_t i; size_t creds_array_byte_size; grpc_call_credentials_array creds1_array; grpc_call_credentials_array creds2_array; grpc_composite_call_credentials *c; GRPC_API_TRACE( "grpc_composite_call_credentials_create(creds1=%p, creds2=%p, " "reserved=%p)", 3, (creds1, creds2, reserved)); GPR_ASSERT(reserved == NULL); GPR_ASSERT(creds1 != NULL); GPR_ASSERT(creds2 != NULL); c = gpr_malloc(sizeof(grpc_composite_call_credentials)); memset(c, 0, sizeof(grpc_composite_call_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE; c->base.vtable = &composite_call_credentials_vtable; gpr_ref_init(&c->base.refcount, 1); creds1_array = get_creds_array(&creds1); creds2_array = get_creds_array(&creds2); c->inner.num_creds = creds1_array.num_creds + creds2_array.num_creds; creds_array_byte_size = c->inner.num_creds * sizeof(grpc_call_credentials *); c->inner.creds_array = gpr_malloc(creds_array_byte_size); memset(c->inner.creds_array, 0, creds_array_byte_size); for (i = 0; i < creds1_array.num_creds; i++) { grpc_call_credentials *cur_creds = creds1_array.creds_array[i]; c->inner.creds_array[i] = grpc_call_credentials_ref(cur_creds); } for (i = 0; i < creds2_array.num_creds; i++) { grpc_call_credentials *cur_creds = creds2_array.creds_array[i]; c->inner.creds_array[i + creds1_array.num_creds] = grpc_call_credentials_ref(cur_creds); } return &c->base; } const grpc_call_credentials_array * grpc_composite_call_credentials_get_credentials(grpc_call_credentials *creds) { const grpc_composite_call_credentials *c = (const grpc_composite_call_credentials *)creds; GPR_ASSERT(strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0); return &c->inner; } grpc_call_credentials *grpc_credentials_contains_type( grpc_call_credentials *creds, const char *type, grpc_call_credentials **composite_creds) { size_t i; if (strcmp(creds->type, type) == 0) { if (composite_creds != NULL) *composite_creds = NULL; return creds; } else if (strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0) { const grpc_call_credentials_array *inner_creds_array = grpc_composite_call_credentials_get_credentials(creds); for (i = 0; i < inner_creds_array->num_creds; i++) { if (strcmp(type, inner_creds_array->creds_array[i]->type) == 0) { if (composite_creds != NULL) *composite_creds = creds; return inner_creds_array->creds_array[i]; } } } return NULL; } /* -- IAM credentials. -- */ static void iam_destruct(grpc_call_credentials *creds) { grpc_google_iam_credentials *c = (grpc_google_iam_credentials *)creds; grpc_credentials_md_store_unref(c->iam_md); } static void iam_get_request_metadata(grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_google_iam_credentials *c = (grpc_google_iam_credentials *)creds; cb(exec_ctx, user_data, c->iam_md->entries, c->iam_md->num_entries, GRPC_CREDENTIALS_OK); } static grpc_call_credentials_vtable iam_vtable = {iam_destruct, iam_get_request_metadata}; grpc_call_credentials *grpc_google_iam_credentials_create( const char *token, const char *authority_selector, void *reserved) { grpc_google_iam_credentials *c; GRPC_API_TRACE( "grpc_iam_credentials_create(token=%s, authority_selector=%s, " "reserved=%p)", 3, (token, authority_selector, reserved)); GPR_ASSERT(reserved == NULL); GPR_ASSERT(token != NULL); GPR_ASSERT(authority_selector != NULL); c = gpr_malloc(sizeof(grpc_google_iam_credentials)); memset(c, 0, sizeof(grpc_google_iam_credentials)); c->base.type = GRPC_CALL_CREDENTIALS_TYPE_IAM; c->base.vtable = &iam_vtable; gpr_ref_init(&c->base.refcount, 1); c->iam_md = grpc_credentials_md_store_create(2); grpc_credentials_md_store_add_cstrings( c->iam_md, GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY, token); grpc_credentials_md_store_add_cstrings( c->iam_md, GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY, authority_selector); return &c->base; } /* -- Plugin credentials. -- */ typedef struct { void *user_data; grpc_credentials_metadata_cb cb; } grpc_metadata_plugin_request; static void plugin_destruct(grpc_call_credentials *creds) { grpc_plugin_credentials *c = (grpc_plugin_credentials *)creds; if (c->plugin.state != NULL && c->plugin.destroy != NULL) { c->plugin.destroy(c->plugin.state); } } static void plugin_md_request_metadata_ready(void *request, const grpc_metadata *md, size_t num_md, grpc_status_code status, const char *error_details) { /* called from application code */ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; grpc_metadata_plugin_request *r = (grpc_metadata_plugin_request *)request; if (status != GRPC_STATUS_OK) { if (error_details != NULL) { gpr_log(GPR_ERROR, "Getting metadata from plugin failed with error: %s", error_details); } r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR); } else { size_t i; grpc_credentials_md *md_array = NULL; if (num_md > 0) { md_array = gpr_malloc(num_md * sizeof(grpc_credentials_md)); for (i = 0; i < num_md; i++) { md_array[i].key = gpr_slice_from_copied_string(md[i].key); md_array[i].value = gpr_slice_from_copied_buffer(md[i].value, md[i].value_length); } } r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK); if (md_array != NULL) { for (i = 0; i < num_md; i++) { gpr_slice_unref(md_array[i].key); gpr_slice_unref(md_array[i].value); } gpr_free(md_array); } } gpr_free(r); grpc_exec_ctx_finish(&exec_ctx); } static void plugin_get_request_metadata(grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, grpc_pollset *pollset, grpc_auth_metadata_context context, grpc_credentials_metadata_cb cb, void *user_data) { grpc_plugin_credentials *c = (grpc_plugin_credentials *)creds; if (c->plugin.get_metadata != NULL) { grpc_metadata_plugin_request *request = gpr_malloc(sizeof(*request)); memset(request, 0, sizeof(*request)); request->user_data = user_data; request->cb = cb; c->plugin.get_metadata(c->plugin.state, context, plugin_md_request_metadata_ready, request); } else { cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK); } } static grpc_call_credentials_vtable plugin_vtable = { plugin_destruct, plugin_get_request_metadata}; grpc_call_credentials *grpc_metadata_credentials_create_from_plugin( grpc_metadata_credentials_plugin plugin, void *reserved) { grpc_plugin_credentials *c = gpr_malloc(sizeof(*c)); GRPC_API_TRACE("grpc_metadata_credentials_create_from_plugin(reserved=%p)", 1, (reserved)); GPR_ASSERT(reserved == NULL); memset(c, 0, sizeof(*c)); c->base.type = plugin.type; c->base.vtable = &plugin_vtable; gpr_ref_init(&c->base.refcount, 1); c->plugin = plugin; return &c->base; } /* -- Composite channel credentials. -- */ static void composite_channel_destruct(grpc_channel_credentials *creds) { grpc_composite_channel_credentials *c = (grpc_composite_channel_credentials *)creds; grpc_channel_credentials_unref(c->inner_creds); grpc_call_credentials_unref(c->call_creds); } static grpc_security_status composite_channel_create_security_connector( grpc_channel_credentials *creds, grpc_call_credentials *call_creds, const char *target, const grpc_channel_args *args, grpc_channel_security_connector **sc, grpc_channel_args **new_args) { grpc_composite_channel_credentials *c = (grpc_composite_channel_credentials *)creds; grpc_security_status status = GRPC_SECURITY_ERROR; GPR_ASSERT(c->inner_creds != NULL && c->call_creds != NULL && c->inner_creds->vtable != NULL && c->inner_creds->vtable->create_security_connector != NULL); /* If we are passed a call_creds, create a call composite to pass it downstream. */ if (call_creds != NULL) { grpc_call_credentials *composite_call_creds = grpc_composite_call_credentials_create(c->call_creds, call_creds, NULL); status = c->inner_creds->vtable->create_security_connector( c->inner_creds, composite_call_creds, target, args, sc, new_args); grpc_call_credentials_unref(composite_call_creds); } else { status = c->inner_creds->vtable->create_security_connector( c->inner_creds, c->call_creds, target, args, sc, new_args); } return status; } static grpc_channel_credentials_vtable composite_channel_credentials_vtable = { composite_channel_destruct, composite_channel_create_security_connector}; grpc_channel_credentials *grpc_composite_channel_credentials_create( grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds, void *reserved) { grpc_composite_channel_credentials *c = gpr_malloc(sizeof(*c)); memset(c, 0, sizeof(*c)); GPR_ASSERT(channel_creds != NULL && call_creds != NULL && reserved == NULL); GRPC_API_TRACE( "grpc_composite_channel_credentials_create(channel_creds=%p, " "call_creds=%p, reserved=%p)", 3, (channel_creds, call_creds, reserved)); c->base.type = channel_creds->type; c->base.vtable = &composite_channel_credentials_vtable; gpr_ref_init(&c->base.refcount, 1); c->inner_creds = grpc_channel_credentials_ref(channel_creds); c->call_creds = grpc_call_credentials_ref(call_creds); return &c->base; }