| // |
| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // 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. |
| // |
| |
| #include "trunks/trunks_dbus_proxy.h" |
| |
| #include <base/bind.h> |
| #include <brillo/bind_lambda.h> |
| #include <brillo/dbus/dbus_method_invoker.h> |
| |
| #include "trunks/dbus_interface.h" |
| #include "trunks/error_codes.h" |
| #include "trunks/interface.pb.h" |
| |
| namespace { |
| |
| // Use a five minute timeout because some commands on some TPM hardware can take |
| // a very long time. If a few lengthy operations are already in the queue, a |
| // subsequent command needs to wait for all of them. Timeouts are always |
| // possible but under normal conditions 5 minutes seems to be plenty. |
| const int kDBusMaxTimeout = 5 * 60 * 1000; |
| |
| } // namespace |
| |
| namespace trunks { |
| |
| TrunksDBusProxy::TrunksDBusProxy() : weak_factory_(this) {} |
| |
| TrunksDBusProxy::~TrunksDBusProxy() { |
| if (bus_) { |
| bus_->ShutdownAndBlock(); |
| } |
| } |
| |
| bool TrunksDBusProxy::Init() { |
| dbus::Bus::Options options; |
| options.bus_type = dbus::Bus::SYSTEM; |
| bus_ = new dbus::Bus(options); |
| object_proxy_ = bus_->GetObjectProxy( |
| trunks::kTrunksServiceName, dbus::ObjectPath(trunks::kTrunksServicePath)); |
| origin_thread_id_ = base::PlatformThread::CurrentId(); |
| return (object_proxy_ != nullptr); |
| } |
| |
| void TrunksDBusProxy::SendCommand(const std::string& command, |
| const ResponseCallback& callback) { |
| if (origin_thread_id_ != base::PlatformThread::CurrentId()) { |
| LOG(ERROR) << "Error TrunksDBusProxy cannot be shared by multiple threads."; |
| callback.Run(CreateErrorResponse(TRUNKS_RC_IPC_ERROR)); |
| } |
| SendCommandRequest tpm_command_proto; |
| tpm_command_proto.set_command(command); |
| auto on_success = [callback](const SendCommandResponse& response) { |
| callback.Run(response.response()); |
| }; |
| auto on_error = [callback](brillo::Error* error) { |
| SendCommandResponse response; |
| response.set_response(CreateErrorResponse(SAPI_RC_NO_RESPONSE_RECEIVED)); |
| callback.Run(response.response()); |
| }; |
| brillo::dbus_utils::CallMethodWithTimeout( |
| kDBusMaxTimeout, object_proxy_, trunks::kTrunksInterface, |
| trunks::kSendCommand, base::Bind(on_success), base::Bind(on_error), |
| tpm_command_proto); |
| } |
| |
| std::string TrunksDBusProxy::SendCommandAndWait(const std::string& command) { |
| if (origin_thread_id_ != base::PlatformThread::CurrentId()) { |
| LOG(ERROR) << "Error TrunksDBusProxy cannot be shared by multiple threads."; |
| return CreateErrorResponse(TRUNKS_RC_IPC_ERROR); |
| } |
| SendCommandRequest tpm_command_proto; |
| tpm_command_proto.set_command(command); |
| brillo::ErrorPtr error; |
| std::unique_ptr<dbus::Response> dbus_response = |
| brillo::dbus_utils::CallMethodAndBlockWithTimeout( |
| kDBusMaxTimeout, object_proxy_, trunks::kTrunksInterface, |
| trunks::kSendCommand, &error, tpm_command_proto); |
| SendCommandResponse tpm_response_proto; |
| if (dbus_response.get() && |
| brillo::dbus_utils::ExtractMethodCallResults(dbus_response.get(), &error, |
| &tpm_response_proto)) { |
| return tpm_response_proto.response(); |
| } else { |
| LOG(ERROR) << "TrunksProxy could not parse response: " |
| << error->GetMessage(); |
| return CreateErrorResponse(SAPI_RC_MALFORMED_RESPONSE); |
| } |
| } |
| |
| } // namespace trunks |