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Diffstat (limited to 'src/core/lib/security/credentials.h')
| -rw-r--r-- | src/core/lib/security/credentials.h | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/src/core/lib/security/credentials.h b/src/core/lib/security/credentials.h new file mode 100644 index 0000000000..7168b98942 --- /dev/null +++ b/src/core/lib/security/credentials.h @@ -0,0 +1,377 @@ +/* + * + * 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. + * + */ + +#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_H +#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_H + +#include <grpc/grpc.h> +#include <grpc/grpc_security.h> +#include <grpc/support/sync.h> +#include "src/core/lib/transport/metadata_batch.h" + +#include "src/core/lib/http/httpcli.h" +#include "src/core/lib/http/parser.h" +#include "src/core/lib/security/json_token.h" +#include "src/core/lib/security/security_connector.h" + +struct grpc_http_response; + +/* --- Constants. --- */ + +typedef enum { + GRPC_CREDENTIALS_OK = 0, + GRPC_CREDENTIALS_ERROR +} grpc_credentials_status; + +#define GRPC_FAKE_TRANSPORT_SECURITY_TYPE "fake" + +#define GRPC_CHANNEL_CREDENTIALS_TYPE_SSL "Ssl" +#define GRPC_CHANNEL_CREDENTIALS_TYPE_FAKE_TRANSPORT_SECURITY \ + "FakeTransportSecurity" + +#define GRPC_CALL_CREDENTIALS_TYPE_OAUTH2 "Oauth2" +#define GRPC_CALL_CREDENTIALS_TYPE_JWT "Jwt" +#define GRPC_CALL_CREDENTIALS_TYPE_IAM "Iam" +#define GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE "Composite" + +#define GRPC_AUTHORIZATION_METADATA_KEY "authorization" +#define GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY \ + "x-goog-iam-authorization-token" +#define GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY "x-goog-iam-authority-selector" + +#define GRPC_GOOGLE_CLOUD_SDK_CONFIG_DIRECTORY "gcloud" +#define GRPC_GOOGLE_WELL_KNOWN_CREDENTIALS_FILE \ + "application_default_credentials.json" + +#define GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS 60 + +#define GRPC_COMPUTE_ENGINE_METADATA_HOST "metadata" +#define GRPC_COMPUTE_ENGINE_METADATA_TOKEN_PATH \ + "/computeMetadata/v1/instance/service-accounts/default/token" + +#define GRPC_GOOGLE_OAUTH2_SERVICE_HOST "www.googleapis.com" +#define GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH "/oauth2/v3/token" + +#define GRPC_SERVICE_ACCOUNT_POST_BODY_PREFIX \ + "grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&" \ + "assertion=" + +#define GRPC_REFRESH_TOKEN_POST_BODY_FORMAT_STRING \ + "client_id=%s&client_secret=%s&refresh_token=%s&grant_type=refresh_token" + +/* --- Google utils --- */ + +/* It is the caller's responsibility to gpr_free the result if not NULL. */ +char *grpc_get_well_known_google_credentials_file_path(void); + +/* Implementation function for the different platforms. */ +char *grpc_get_well_known_google_credentials_file_path_impl(void); + +/* Override for testing only. Not thread-safe */ +typedef char *(*grpc_well_known_credentials_path_getter)(void); +void grpc_override_well_known_credentials_path_getter( + grpc_well_known_credentials_path_getter getter); + +/* --- grpc_channel_credentials. --- */ + +typedef struct { + void (*destruct)(grpc_channel_credentials *c); + + grpc_security_status (*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); +} grpc_channel_credentials_vtable; + +struct grpc_channel_credentials { + const grpc_channel_credentials_vtable *vtable; + const char *type; + gpr_refcount refcount; +}; + +grpc_channel_credentials *grpc_channel_credentials_ref( + grpc_channel_credentials *creds); +void grpc_channel_credentials_unref(grpc_channel_credentials *creds); + +/* Creates a security connector for the channel. May also create new channel + args for the channel to be used in place of the passed in const args if + returned non NULL. In that case the caller is responsible for destroying + new_args after channel creation. */ +grpc_security_status grpc_channel_credentials_create_security_connector( + grpc_channel_credentials *creds, const char *target, + const grpc_channel_args *args, grpc_channel_security_connector **sc, + grpc_channel_args **new_args); + +/* --- grpc_credentials_md. --- */ + +typedef struct { + gpr_slice key; + gpr_slice value; +} grpc_credentials_md; + +typedef struct { + grpc_credentials_md *entries; + size_t num_entries; + size_t allocated; + gpr_refcount refcount; +} grpc_credentials_md_store; + +grpc_credentials_md_store *grpc_credentials_md_store_create( + size_t initial_capacity); + +/* Will ref key and value. */ +void grpc_credentials_md_store_add(grpc_credentials_md_store *store, + gpr_slice key, gpr_slice value); +void grpc_credentials_md_store_add_cstrings(grpc_credentials_md_store *store, + const char *key, const char *value); +grpc_credentials_md_store *grpc_credentials_md_store_ref( + grpc_credentials_md_store *store); +void grpc_credentials_md_store_unref(grpc_credentials_md_store *store); + +/* --- grpc_call_credentials. --- */ + +typedef void (*grpc_credentials_metadata_cb)(grpc_exec_ctx *exec_ctx, + void *user_data, + grpc_credentials_md *md_elems, + size_t num_md, + grpc_credentials_status status); + +typedef struct { + void (*destruct)(grpc_call_credentials *c); + void (*get_request_metadata)(grpc_exec_ctx *exec_ctx, + grpc_call_credentials *c, grpc_pollset *pollset, + grpc_auth_metadata_context context, + grpc_credentials_metadata_cb cb, + void *user_data); +} grpc_call_credentials_vtable; + +struct grpc_call_credentials { + const grpc_call_credentials_vtable *vtable; + const char *type; + gpr_refcount refcount; +}; + +grpc_call_credentials *grpc_call_credentials_ref(grpc_call_credentials *creds); +void grpc_call_credentials_unref(grpc_call_credentials *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); + +typedef struct { + grpc_call_credentials **creds_array; + size_t num_creds; +} grpc_call_credentials_array; + +const grpc_call_credentials_array * +grpc_composite_call_credentials_get_credentials( + grpc_call_credentials *composite_creds); + +/* Returns creds if creds is of the specified type or the inner creds of the + specified type (if found), if the creds is of type COMPOSITE. + If composite_creds is not NULL, *composite_creds will point to creds if of + type COMPOSITE in case of success. */ +grpc_call_credentials *grpc_credentials_contains_type( + grpc_call_credentials *creds, const char *type, + grpc_call_credentials **composite_creds); + +/* Exposed for testing only. */ +grpc_credentials_status +grpc_oauth2_token_fetcher_credentials_parse_server_response( + const struct grpc_http_response *response, + grpc_credentials_md_store **token_md, gpr_timespec *token_lifetime); + +void grpc_flush_cached_google_default_credentials(void); + +/* Metadata-only credentials with the specified key and value where + asynchronicity can be simulated for testing. */ +grpc_call_credentials *grpc_md_only_test_credentials_create( + const char *md_key, const char *md_value, int is_async); + +/* Private constructor for jwt credentials from an already parsed json key. + Takes ownership of the key. */ +grpc_call_credentials * +grpc_service_account_jwt_access_credentials_create_from_auth_json_key( + grpc_auth_json_key key, gpr_timespec token_lifetime); + +/* Private constructor for refresh token credentials from an already parsed + refresh token. Takes ownership of the refresh token. */ +grpc_call_credentials * +grpc_refresh_token_credentials_create_from_auth_refresh_token( + grpc_auth_refresh_token token); + +/* --- grpc_server_credentials. --- */ + +typedef struct { + void (*destruct)(grpc_server_credentials *c); + grpc_security_status (*create_security_connector)( + grpc_server_credentials *c, grpc_server_security_connector **sc); +} grpc_server_credentials_vtable; + +struct grpc_server_credentials { + const grpc_server_credentials_vtable *vtable; + const char *type; + gpr_refcount refcount; + grpc_auth_metadata_processor processor; +}; + +grpc_security_status grpc_server_credentials_create_security_connector( + grpc_server_credentials *creds, grpc_server_security_connector **sc); + +grpc_server_credentials *grpc_server_credentials_ref( + grpc_server_credentials *creds); + +void grpc_server_credentials_unref(grpc_server_credentials *creds); + +#define GRPC_SERVER_CREDENTIALS_ARG "grpc.server_credentials" + +grpc_arg grpc_server_credentials_to_arg(grpc_server_credentials *c); +grpc_server_credentials *grpc_server_credentials_from_arg(const grpc_arg *arg); +grpc_server_credentials *grpc_find_server_credentials_in_args( + const grpc_channel_args *args); + +/* -- Fake transport security credentials. -- */ + +/* Creates a fake transport security credentials object for testing. */ +grpc_channel_credentials *grpc_fake_transport_security_credentials_create(void); +/* Creates a fake server transport security credentials object for testing. */ +grpc_server_credentials *grpc_fake_transport_security_server_credentials_create( + void); + +/* -- Ssl credentials. -- */ + +typedef struct { + grpc_channel_credentials base; + grpc_ssl_config config; +} grpc_ssl_credentials; + +typedef struct { + grpc_server_credentials base; + grpc_ssl_server_config config; +} grpc_ssl_server_credentials; + +/* -- Channel composite credentials. -- */ + +typedef struct { + grpc_channel_credentials base; + grpc_channel_credentials *inner_creds; + grpc_call_credentials *call_creds; +} grpc_composite_channel_credentials; + +/* -- Jwt credentials -- */ + +typedef struct { + grpc_call_credentials base; + + /* Have a simple cache for now with just 1 entry. We could have a map based on + the service_url for a more sophisticated one. */ + gpr_mu cache_mu; + struct { + grpc_credentials_md_store *jwt_md; + char *service_url; + gpr_timespec jwt_expiration; + } cached; + + grpc_auth_json_key key; + gpr_timespec jwt_lifetime; +} grpc_service_account_jwt_access_credentials; + +/* -- Oauth2TokenFetcher credentials -- + + This object is a base for credentials that need to acquire an oauth2 token + from an http service. */ + +typedef struct grpc_credentials_metadata_request + grpc_credentials_metadata_request; + +typedef void (*grpc_fetch_oauth2_func)(grpc_exec_ctx *exec_ctx, + grpc_credentials_metadata_request *req, + grpc_httpcli_context *http_context, + grpc_pollset *pollset, + grpc_httpcli_response_cb response_cb, + gpr_timespec deadline); + +typedef struct { + grpc_call_credentials base; + gpr_mu mu; + grpc_credentials_md_store *access_token_md; + gpr_timespec token_expiration; + grpc_httpcli_context httpcli_context; + grpc_fetch_oauth2_func fetch_func; +} grpc_oauth2_token_fetcher_credentials; + +/* -- GoogleRefreshToken credentials. -- */ + +typedef struct { + grpc_oauth2_token_fetcher_credentials base; + grpc_auth_refresh_token refresh_token; +} grpc_google_refresh_token_credentials; + +/* -- Oauth2 Access Token credentials. -- */ + +typedef struct { + grpc_call_credentials base; + grpc_credentials_md_store *access_token_md; +} grpc_access_token_credentials; + +/* -- Metadata-only Test credentials. -- */ + +typedef struct { + grpc_call_credentials base; + grpc_credentials_md_store *md_store; + int is_async; +} grpc_md_only_test_credentials; + +/* -- GoogleIAM credentials. -- */ + +typedef struct { + grpc_call_credentials base; + grpc_credentials_md_store *iam_md; +} grpc_google_iam_credentials; + +/* -- Composite credentials. -- */ + +typedef struct { + grpc_call_credentials base; + grpc_call_credentials_array inner; +} grpc_composite_call_credentials; + +/* -- Plugin credentials. -- */ + +typedef struct { + grpc_call_credentials base; + grpc_metadata_credentials_plugin plugin; + grpc_credentials_md_store *plugin_md; +} grpc_plugin_credentials; + +#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_H */ |