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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_OAUTH2_OAUTH2_CREDENTIALS_H
#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_OAUTH2_OAUTH2_CREDENTIALS_H
#include <grpc/support/port_platform.h>
#include "src/core/lib/json/json.h"
#include "src/core/lib/security/credentials/credentials.h"
// auth_refresh_token parsing.
typedef struct {
const char* type;
char* client_id;
char* client_secret;
char* refresh_token;
} grpc_auth_refresh_token;
/// Returns 1 if the object is valid, 0 otherwise.
int grpc_auth_refresh_token_is_valid(
const grpc_auth_refresh_token* refresh_token);
/// Creates a refresh token object from string. Returns an invalid object if a
/// parsing error has been encountered.
grpc_auth_refresh_token grpc_auth_refresh_token_create_from_string(
const char* json_string);
/// Creates a refresh token object from parsed json. Returns an invalid object
/// if a parsing error has been encountered.
grpc_auth_refresh_token grpc_auth_refresh_token_create_from_json(
const grpc_json* json);
/// Destructs the object.
void grpc_auth_refresh_token_destruct(grpc_auth_refresh_token* refresh_token);
// -- Oauth2 Token Fetcher credentials --
//
// This object is a base for credentials that need to acquire an oauth2 token
// from an http service.
struct grpc_oauth2_pending_get_request_metadata {
grpc_credentials_mdelem_array* md_array;
grpc_closure* on_request_metadata;
grpc_polling_entity* pollent;
struct grpc_oauth2_pending_get_request_metadata* next;
};
class grpc_oauth2_token_fetcher_credentials : public grpc_call_credentials {
public:
grpc_oauth2_token_fetcher_credentials();
~grpc_oauth2_token_fetcher_credentials() override;
bool get_request_metadata(grpc_polling_entity* pollent,
grpc_auth_metadata_context context,
grpc_credentials_mdelem_array* md_array,
grpc_closure* on_request_metadata,
grpc_error** error) override;
void cancel_get_request_metadata(grpc_credentials_mdelem_array* md_array,
grpc_error* error) override;
void on_http_response(grpc_credentials_metadata_request* r,
grpc_error* error);
GRPC_ABSTRACT_BASE_CLASS
protected:
virtual void fetch_oauth2(grpc_credentials_metadata_request* req,
grpc_httpcli_context* httpcli_context,
grpc_polling_entity* pollent, grpc_iomgr_cb_func cb,
grpc_millis deadline) GRPC_ABSTRACT;
private:
gpr_mu mu_;
grpc_mdelem access_token_md_ = GRPC_MDNULL;
gpr_timespec token_expiration_;
bool token_fetch_pending_ = false;
grpc_oauth2_pending_get_request_metadata* pending_requests_ = nullptr;
grpc_httpcli_context httpcli_context_;
grpc_polling_entity pollent_;
};
// Google refresh token credentials.
class grpc_google_refresh_token_credentials final
: public grpc_oauth2_token_fetcher_credentials {
public:
grpc_google_refresh_token_credentials(grpc_auth_refresh_token refresh_token);
~grpc_google_refresh_token_credentials() override;
const grpc_auth_refresh_token& refresh_token() const {
return refresh_token_;
}
protected:
void fetch_oauth2(grpc_credentials_metadata_request* req,
grpc_httpcli_context* httpcli_context,
grpc_polling_entity* pollent, grpc_iomgr_cb_func cb,
grpc_millis deadline) override;
private:
grpc_auth_refresh_token refresh_token_;
};
// Access token credentials.
class grpc_access_token_credentials final : public grpc_call_credentials {
public:
grpc_access_token_credentials(const char* access_token);
~grpc_access_token_credentials() override;
bool get_request_metadata(grpc_polling_entity* pollent,
grpc_auth_metadata_context context,
grpc_credentials_mdelem_array* md_array,
grpc_closure* on_request_metadata,
grpc_error** error) override;
void cancel_get_request_metadata(grpc_credentials_mdelem_array* md_array,
grpc_error* error) override;
private:
grpc_mdelem access_token_md_;
};
// Private constructor for refresh token credentials from an already parsed
// refresh token. Takes ownership of the refresh token.
grpc_core::RefCountedPtr<grpc_call_credentials>
grpc_refresh_token_credentials_create_from_auth_refresh_token(
grpc_auth_refresh_token token);
// Exposed for testing only.
grpc_credentials_status
grpc_oauth2_token_fetcher_credentials_parse_server_response(
const struct grpc_http_response* response, grpc_mdelem* token_md,
grpc_millis* token_lifetime);
#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_OAUTH2_OAUTH2_CREDENTIALS_H */
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