| // Copyright 2014 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "trunks/trunks_proxy.h" |
| |
| #include <base/bind.h> |
| #include <chromeos/bind_lambda.h> |
| #include <chromeos/dbus/dbus_method_invoker.h> |
| |
| #include "trunks/dbus_interface.h" |
| #include "trunks/dbus_interface.pb.h" |
| #include "trunks/error_codes.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 { |
| |
| TrunksProxy::TrunksProxy() : weak_factory_(this) {} |
| |
| TrunksProxy::~TrunksProxy() { |
| if (bus_) { |
| bus_->ShutdownAndBlock(); |
| } |
| } |
| |
| bool TrunksProxy::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 TrunksProxy::SendCommand(const std::string& command, |
| const ResponseCallback& callback) { |
| if ((origin_thread_id_ != base::PlatformThread::CurrentId()) && |
| (!Init())) { |
| LOG(ERROR) << "Error intializing trunks dbus proxy object."; |
| callback.Run(CreateErrorResponse(TRUNKS_RC_IPC_ERROR)); |
| } |
| SendCommandRequest tpm_command_proto; |
| tpm_command_proto.set_command(command); |
| auto on_error = [callback](chromeos::Error* error) { |
| SendCommandResponse response; |
| response.set_response(CreateErrorResponse(SAPI_RC_NO_RESPONSE_RECEIVED)); |
| callback.Run(response.response()); |
| }; |
| chromeos::dbus_utils::CallMethodWithTimeout( |
| kDBusMaxTimeout, |
| object_proxy_, |
| trunks::kTrunksInterface, |
| trunks::kSendCommand, |
| callback, |
| base::Bind(on_error), |
| tpm_command_proto); |
| } |
| |
| std::string TrunksProxy::SendCommandAndWait(const std::string& command) { |
| if ((origin_thread_id_ != base::PlatformThread::CurrentId()) && |
| (!Init())) { |
| LOG(ERROR) << "Error intializing trunks dbus proxy object."; |
| return CreateErrorResponse(TRUNKS_RC_IPC_ERROR); |
| } |
| SendCommandRequest tpm_command_proto; |
| tpm_command_proto.set_command(command); |
| chromeos::ErrorPtr error; |
| std::unique_ptr<dbus::Response> dbus_response = |
| chromeos::dbus_utils::CallMethodAndBlockWithTimeout( |
| kDBusMaxTimeout, |
| object_proxy_, |
| trunks::kTrunksInterface, |
| trunks::kSendCommand, |
| &error, |
| tpm_command_proto); |
| SendCommandResponse tpm_response_proto; |
| if (dbus_response.get() && chromeos::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 |