text: /*
   *
   * 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_FAKE_FAKE_CREDENTIALS_H
  #define GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H
  
  #include <grpc/support/port_platform.h>
  
  #include "src/core/lib/security/credentials/credentials.h"
  
  #define GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS \
    "grpc.fake_security.expected_targets"
  
  /* -- 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);
  
  /* Used to verify the target names given to the fake transport security
   * connector.
   *
   * The syntax of \a expected_targets by example:
   * For LB channels:
   *     "backend_target_1,backend_target_2,...;lb_target_1,lb_target_2,..."
   * For regular channels:
   *     "backend_taget_1,backend_target_2,..."
   *
   * That is to say, LB channels have a heading list of LB targets separated from
   * the list of backend targets by a semicolon. For non-LB channels, only the
   * latter is present. */
  grpc_arg grpc_fake_transport_expected_targets_arg(char* expected_targets);
  
  /* Return the value associated with the expected targets channel arg or NULL */
  const char* grpc_fake_transport_get_expected_targets(
      const grpc_channel_args* args);
  
  /* --  Metadata-only Test credentials. -- */
  
  class grpc_md_only_test_credentials : public grpc_call_credentials {
   public:
    grpc_md_only_test_credentials(const char* md_key, const char* md_value,
                                  bool is_async)
        : grpc_call_credentials(GRPC_CALL_CREDENTIALS_TYPE_OAUTH2),
          md_(grpc_mdelem_from_slices(grpc_slice_from_copied_string(md_key),
                                      grpc_slice_from_copied_string(md_value))),
          is_async_(is_async) {}
    ~grpc_md_only_test_credentials() override { GRPC_MDELEM_UNREF(md_); }
  
    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 md_;
    bool is_async_;
  };
  
  #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H */
  