credentials.h

Go to the documentation of this file.

/*
 *
 * Copyright 2015, 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 GRPCXX_CREDENTIALS_H
#define GRPCXX_CREDENTIALS_H

#include <memory>

#include <grpc++/impl/grpc_library.h>
#include <grpc++/support/config.h>

namespace grpc {
class ChannelArguments;
class Channel;
class SecureCredentials;

class Credentials : public GrpcLibrary {
 public:
  ~Credentials() GRPC_OVERRIDE;

  virtual bool ApplyToCall(grpc_call* call) = 0;

 protected:
  friend std::shared_ptr<Credentials> CompositeCredentials(
      const std::shared_ptr<Credentials>& creds1,
      const std::shared_ptr<Credentials>& creds2);

  virtual SecureCredentials* AsSecureCredentials() = 0;

 private:
  friend std::shared_ptr<Channel> CreateCustomChannel(
      const grpc::string& target, const std::shared_ptr<Credentials>& creds,
      const ChannelArguments& args);

  virtual std::shared_ptr<Channel> CreateChannel(
      const grpc::string& target, const ChannelArguments& args) = 0;
};

struct SslCredentialsOptions {
  grpc::string pem_root_certs;

  grpc::string pem_private_key;

  grpc::string pem_cert_chain;
};

// Factories for building different types of Credentials The functions may
// return empty shared_ptr when credentials cannot be created. If a
// Credentials pointer is returned, it can still be invalid when used to create
// a channel. A lame channel will be created then and all rpcs will fail on it.

std::shared_ptr<Credentials> GoogleDefaultCredentials();

std::shared_ptr<Credentials> SslCredentials(
    const SslCredentialsOptions& options);

std::shared_ptr<Credentials> GoogleComputeEngineCredentials();

std::shared_ptr<Credentials> ServiceAccountJWTAccessCredentials(
    const grpc::string& json_key, long token_lifetime_seconds);

std::shared_ptr<Credentials> GoogleRefreshTokenCredentials(
    const grpc::string& json_refresh_token);

std::shared_ptr<Credentials> AccessTokenCredentials(
    const grpc::string& access_token);

std::shared_ptr<Credentials> GoogleIAMCredentials(
    const grpc::string& authorization_token,
    const grpc::string& authority_selector);

std::shared_ptr<Credentials> CompositeCredentials(
    const std::shared_ptr<Credentials>& creds1,
    const std::shared_ptr<Credentials>& creds2);

std::shared_ptr<Credentials> InsecureCredentials();

}  // namespace grpc

#endif  // GRPCXX_CREDENTIALS_H