diff options
Diffstat (limited to 'src/core/lib/security/credentials/google_default/google_default_credentials.cc')
| -rw-r--r-- | src/core/lib/security/credentials/google_default/google_default_credentials.cc | 100 |
1 files changed, 79 insertions, 21 deletions
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.cc b/src/core/lib/security/credentials/google_default/google_default_credentials.cc index 70d4c3ea51..03e8cb3b40 100644 --- a/src/core/lib/security/credentials/google_default/google_default_credentials.cc +++ b/src/core/lib/security/credentials/google_default/google_default_credentials.cc @@ -26,12 +26,15 @@ #include <grpc/support/log.h> #include <grpc/support/sync.h> +#include "src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.h" +#include "src/core/lib/channel/channel_args.h" #include "src/core/lib/gpr/env.h" #include "src/core/lib/gpr/string.h" #include "src/core/lib/http/httpcli.h" #include "src/core/lib/http/parser.h" #include "src/core/lib/iomgr/load_file.h" #include "src/core/lib/iomgr/polling_entity.h" +#include "src/core/lib/security/credentials/alts/alts_credentials.h" #include "src/core/lib/security/credentials/google_default/google_default_credentials.h" #include "src/core/lib/security/credentials/jwt/jwt_credentials.h" #include "src/core/lib/security/credentials/oauth2/oauth2_credentials.h" @@ -45,8 +48,8 @@ /* -- Default credentials. -- */ -static grpc_channel_credentials* default_credentials = nullptr; -static int compute_engine_detection_done = 0; +static grpc_channel_credentials* g_default_credentials = nullptr; +static int g_compute_engine_detection_done = 0; static gpr_mu g_state_mu; static gpr_mu* g_polling_mu; static gpr_once g_once = GPR_ONCE_INIT; @@ -60,6 +63,54 @@ typedef struct { grpc_http_response response; } compute_engine_detector; +static void google_default_credentials_destruct( + grpc_channel_credentials* creds) { + grpc_google_default_channel_credentials* c = + reinterpret_cast<grpc_google_default_channel_credentials*>(creds); + grpc_channel_credentials_unref(c->alts_creds); + grpc_channel_credentials_unref(c->ssl_creds); +} + +static grpc_security_status google_default_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_google_default_channel_credentials* c = + reinterpret_cast<grpc_google_default_channel_credentials*>(creds); + bool is_grpclb_load_balancer = grpc_channel_arg_get_bool( + grpc_channel_args_find(args, GRPC_ARG_ADDRESS_IS_GRPCLB_LOAD_BALANCER), + false); + bool is_backend_from_grpclb_load_balancer = grpc_channel_arg_get_bool( + grpc_channel_args_find( + args, GRPC_ARG_ADDRESS_IS_BACKEND_FROM_GRPCLB_LOAD_BALANCER), + false); + bool use_alts = + is_grpclb_load_balancer || is_backend_from_grpclb_load_balancer; + grpc_security_status status = GRPC_SECURITY_ERROR; + status = use_alts ? c->alts_creds->vtable->create_security_connector( + c->alts_creds, call_creds, target, args, sc, new_args) + : c->ssl_creds->vtable->create_security_connector( + c->ssl_creds, call_creds, target, args, sc, new_args); + /* grpclb-specific channel args are removed from the channel args set + * to ensure backends and fallback adresses will have the same set of channel + * args. By doing that, it guarantees the connections to backends will not be + * torn down and re-connected when switching in and out of fallback mode. + */ + if (use_alts) { + static const char* args_to_remove[] = { + GRPC_ARG_ADDRESS_IS_GRPCLB_LOAD_BALANCER, + GRPC_ARG_ADDRESS_IS_BACKEND_FROM_GRPCLB_LOAD_BALANCER, + }; + *new_args = grpc_channel_args_copy_and_add_and_remove( + args, args_to_remove, GPR_ARRAY_SIZE(args_to_remove), nullptr, 0); + } + return status; +} + +static grpc_channel_credentials_vtable google_default_credentials_vtable = { + google_default_credentials_destruct, + google_default_create_security_connector, nullptr}; + static void on_compute_engine_detection_http_response(void* user_data, grpc_error* error) { compute_engine_detector* detector = @@ -234,8 +285,8 @@ grpc_channel_credentials* grpc_google_default_credentials_create(void) { gpr_mu_lock(&g_state_mu); - if (default_credentials != nullptr) { - result = grpc_channel_credentials_ref(default_credentials); + if (g_default_credentials != nullptr) { + result = grpc_channel_credentials_ref(g_default_credentials); goto end; } @@ -253,9 +304,9 @@ grpc_channel_credentials* grpc_google_default_credentials_create(void) { /* At last try to see if we're on compute engine (do the detection only once since it requires a network test). */ - if (!compute_engine_detection_done) { + if (!g_compute_engine_detection_done) { int need_compute_engine_creds = is_stack_running_on_compute_engine(); - compute_engine_detection_done = 1; + g_compute_engine_detection_done = 1; if (need_compute_engine_creds) { call_creds = grpc_google_compute_engine_credentials_create(nullptr); if (call_creds == nullptr) { @@ -269,18 +320,25 @@ grpc_channel_credentials* grpc_google_default_credentials_create(void) { end: if (result == nullptr) { if (call_creds != nullptr) { - /* Blend with default ssl credentials and add a global reference so that - it - can be cached and re-served. */ - grpc_channel_credentials* ssl_creds = - grpc_ssl_credentials_create(nullptr, nullptr, nullptr); - default_credentials = grpc_channel_credentials_ref( - grpc_composite_channel_credentials_create(ssl_creds, call_creds, - nullptr)); - GPR_ASSERT(default_credentials != nullptr); - grpc_channel_credentials_unref(ssl_creds); + /* Create google default credentials. */ + auto creds = static_cast<grpc_google_default_channel_credentials*>( + gpr_zalloc(sizeof(grpc_google_default_channel_credentials))); + creds->base.vtable = &google_default_credentials_vtable; + creds->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_GOOGLE_DEFAULT; + gpr_ref_init(&creds->base.refcount, 1); + creds->ssl_creds = grpc_ssl_credentials_create(nullptr, nullptr, nullptr); + GPR_ASSERT(creds->ssl_creds != nullptr); + grpc_alts_credentials_options* options = + grpc_alts_credentials_client_options_create(); + creds->alts_creds = grpc_alts_credentials_create(options); + grpc_alts_credentials_options_destroy(options); + /* Add a global reference so that it can be cached and re-served. */ + g_default_credentials = grpc_composite_channel_credentials_create( + &creds->base, call_creds, nullptr); + GPR_ASSERT(g_default_credentials != nullptr); + grpc_channel_credentials_unref(&creds->base); grpc_call_credentials_unref(call_creds); - result = default_credentials; + result = grpc_channel_credentials_ref(g_default_credentials); } else { gpr_log(GPR_ERROR, "Could not create google default credentials."); } @@ -299,11 +357,11 @@ void grpc_flush_cached_google_default_credentials(void) { grpc_core::ExecCtx exec_ctx; gpr_once_init(&g_once, init_default_credentials); gpr_mu_lock(&g_state_mu); - if (default_credentials != nullptr) { - grpc_channel_credentials_unref(default_credentials); - default_credentials = nullptr; + if (g_default_credentials != nullptr) { + grpc_channel_credentials_unref(g_default_credentials); + g_default_credentials = nullptr; } - compute_engine_detection_done = 0; + g_compute_engine_detection_done = 0; gpr_mu_unlock(&g_state_mu); } |