chromeos/dbus/fake_cryptohome_client.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromeos/dbus/fake_cryptohome_client.h"
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_util.h"
   9 #include "base/location.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/path_service.h"
  12 #include "base/threading/thread_restrictions.h"
  13 #include "chromeos/chromeos_paths.h"
  14 #include "chromeos/dbus/cryptohome/key.pb.h"
  15 #include "chromeos/dbus/cryptohome/rpc.pb.h"
  16 #include "third_party/cros_system_api/dbus/service_constants.h"
  17 #include "third_party/protobuf/src/google/protobuf/io/coded_stream.h"
  18 #include "third_party/protobuf/src/google/protobuf/io/zero_copy_stream.h"
  19 #include "third_party/protobuf/src/google/protobuf/io/zero_copy_stream_impl_lite.h"
  20
  21 namespace chromeos {
  22
  23 FakeCryptohomeClient::FakeCryptohomeClient()
  24     : service_is_available_(true),
  25       async_call_id_(1),
  26       unmount_result_(true),
  27       system_salt_(GetStubSystemSalt()),
  28       weak_ptr_factory_(this) {
  29   base::FilePath cache_path;
  30   locked_ = PathService::Get(chromeos::FILE_INSTALL_ATTRIBUTES, &cache_path) &&
  31             base::PathExists(cache_path);
  32 }
  33
  34 FakeCryptohomeClient::~FakeCryptohomeClient() {}
  35
  36 void FakeCryptohomeClient::Init(dbus::Bus* bus) {
  37 }
  38
  39 void FakeCryptohomeClient::SetAsyncCallStatusHandlers(
  40     const AsyncCallStatusHandler& handler,
  41     const AsyncCallStatusWithDataHandler& data_handler) {
  42   async_call_status_handler_ = handler;
  43   async_call_status_data_handler_ = data_handler;
  44 }
  45
  46 void FakeCryptohomeClient::ResetAsyncCallStatusHandlers() {
  47   async_call_status_handler_.Reset();
  48   async_call_status_data_handler_.Reset();
  49 }
  50
  51 void FakeCryptohomeClient::WaitForServiceToBeAvailable(
  52     const WaitForServiceToBeAvailableCallback& callback) {
  53   if (service_is_available_) {
  54     base::MessageLoop::current()->PostTask(FROM_HERE,
  55                                            base::Bind(callback, true));
  56   } else {
  57     pending_wait_for_service_to_be_available_callbacks_.push_back(callback);
  58   }
  59 }
  60
  61 void FakeCryptohomeClient::IsMounted(
  62     const BoolDBusMethodCallback& callback) {
  63   base::MessageLoop::current()->PostTask(
  64       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
  65 }
  66
  67 bool FakeCryptohomeClient::Unmount(bool* success) {
  68   *success = unmount_result_;
  69   return true;
  70 }
  71
  72 void FakeCryptohomeClient::AsyncCheckKey(
  73     const std::string& username,
  74     const std::string& key,
  75     const AsyncMethodCallback& callback) {
  76   ReturnAsyncMethodResult(callback, false);
  77 }
  78
  79 void FakeCryptohomeClient::AsyncMigrateKey(
  80     const std::string& username,
  81     const std::string& from_key,
  82     const std::string& to_key,
  83     const AsyncMethodCallback& callback) {
  84   ReturnAsyncMethodResult(callback, false);
  85 }
  86
  87 void FakeCryptohomeClient::AsyncRemove(
  88     const std::string& username,
  89     const AsyncMethodCallback& callback) {
  90   ReturnAsyncMethodResult(callback, false);
  91 }
  92
  93 void FakeCryptohomeClient::GetSystemSalt(
  94     const GetSystemSaltCallback& callback) {
  95   base::MessageLoop::current()->PostTask(
  96       FROM_HERE,
  97       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, system_salt_));
  98 }
  99
 100 void FakeCryptohomeClient::GetSanitizedUsername(
 101     const std::string& username,
 102     const StringDBusMethodCallback& callback) {
 103   // Even for stub implementation we have to return different values so that
 104   // multi-profiles would work.
 105   std::string sanitized_username = GetStubSanitizedUsername(username);
 106   base::MessageLoop::current()->PostTask(
 107       FROM_HERE,
 108       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, sanitized_username));
 109 }
 110
 111 std::string FakeCryptohomeClient::BlockingGetSanitizedUsername(
 112     const std::string& username) {
 113   return GetStubSanitizedUsername(username);
 114 }
 115
 116 void FakeCryptohomeClient::AsyncMount(const std::string& username,
 117                                           const std::string& key,
 118                                           int flags,
 119                                           const AsyncMethodCallback& callback) {
 120   ReturnAsyncMethodResult(callback, false);
 121 }
 122
 123 void FakeCryptohomeClient::AsyncAddKey(
 124     const std::string& username,
 125     const std::string& key,
 126     const std::string& new_key,
 127     const AsyncMethodCallback& callback) {
 128   ReturnAsyncMethodResult(callback, false);
 129 }
 130
 131 void FakeCryptohomeClient::AsyncMountGuest(
 132     const AsyncMethodCallback& callback) {
 133   ReturnAsyncMethodResult(callback, false);
 134 }
 135
 136 void FakeCryptohomeClient::AsyncMountPublic(
 137     const std::string& public_mount_id,
 138     int flags,
 139     const AsyncMethodCallback& callback) {
 140   ReturnAsyncMethodResult(callback, false);
 141 }
 142
 143 void FakeCryptohomeClient::TpmIsReady(
 144     const BoolDBusMethodCallback& callback) {
 145   base::MessageLoop::current()->PostTask(
 146       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 147 }
 148
 149 void FakeCryptohomeClient::TpmIsEnabled(
 150     const BoolDBusMethodCallback& callback) {
 151   base::MessageLoop::current()->PostTask(
 152       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 153 }
 154
 155 bool FakeCryptohomeClient::CallTpmIsEnabledAndBlock(bool* enabled) {
 156   *enabled = true;
 157   return true;
 158 }
 159
 160 void FakeCryptohomeClient::TpmGetPassword(
 161     const StringDBusMethodCallback& callback) {
 162   const char kStubTpmPassword[] = "Stub-TPM-password";
 163   base::MessageLoop::current()->PostTask(
 164       FROM_HERE,
 165       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS,
 166                  std::string(kStubTpmPassword)));
 167 }
 168
 169 void FakeCryptohomeClient::TpmIsOwned(
 170     const BoolDBusMethodCallback& callback) {
 171   base::MessageLoop::current()->PostTask(
 172       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 173 }
 174
 175 bool FakeCryptohomeClient::CallTpmIsOwnedAndBlock(bool* owned) {
 176   *owned = true;
 177   return true;
 178 }
 179
 180 void FakeCryptohomeClient::TpmIsBeingOwned(
 181     const BoolDBusMethodCallback& callback) {
 182   base::MessageLoop::current()->PostTask(
 183       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 184 }
 185
 186 bool FakeCryptohomeClient::CallTpmIsBeingOwnedAndBlock(bool* owning) {
 187   *owning = true;
 188   return true;
 189 }
 190
 191 void FakeCryptohomeClient::TpmCanAttemptOwnership(
 192     const VoidDBusMethodCallback& callback) {
 193   base::MessageLoop::current()->PostTask(
 194       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS));
 195 }
 196
 197 void FakeCryptohomeClient::TpmClearStoredPassword(
 198     const VoidDBusMethodCallback& callback) {
 199   base::MessageLoop::current()->PostTask(
 200       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS));
 201 }
 202
 203 bool FakeCryptohomeClient::CallTpmClearStoredPasswordAndBlock() {
 204   return true;
 205 }
 206
 207 void FakeCryptohomeClient::Pkcs11IsTpmTokenReady(
 208     const BoolDBusMethodCallback& callback) {
 209   base::MessageLoop::current()->PostTask(
 210       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 211 }
 212
 213 void FakeCryptohomeClient::Pkcs11GetTpmTokenInfo(
 214     const Pkcs11GetTpmTokenInfoCallback& callback) {
 215   const char kStubTPMTokenName[] = "StubTPMTokenName";
 216   const char kStubUserPin[] = "012345";
 217   const int kStubSlot = 0;
 218   base::MessageLoop::current()->PostTask(
 219       FROM_HERE,
 220       base::Bind(callback,
 221                  DBUS_METHOD_CALL_SUCCESS,
 222                  std::string(kStubTPMTokenName),
 223                  std::string(kStubUserPin),
 224                  kStubSlot));
 225 }
 226
 227 void FakeCryptohomeClient::Pkcs11GetTpmTokenInfoForUser(
 228     const std::string& username,
 229     const Pkcs11GetTpmTokenInfoCallback& callback) {
 230   Pkcs11GetTpmTokenInfo(callback);
 231 }
 232
 233 bool FakeCryptohomeClient::InstallAttributesGet(const std::string& name,
 234                                                     std::vector<uint8>* value,
 235                                                     bool* successful) {
 236   if (install_attrs_.find(name) != install_attrs_.end()) {
 237     *value = install_attrs_[name];
 238     *successful = true;
 239   } else {
 240     value->clear();
 241     *successful = false;
 242   }
 243   return true;
 244 }
 245
 246 bool FakeCryptohomeClient::InstallAttributesSet(
 247     const std::string& name,
 248     const std::vector<uint8>& value,
 249     bool* successful) {
 250   install_attrs_[name] = value;
 251   *successful = true;
 252   return true;
 253 }
 254
 255 bool FakeCryptohomeClient::InstallAttributesFinalize(bool* successful) {
 256   locked_ = true;
 257   *successful = true;
 258
 259   // Persist the install attributes so that they can be reloaded if the
 260   // browser is restarted. This is used for ease of development when device
 261   // enrollment is required.
 262   // The cryptohome::SerializedInstallAttributes protobuf lives in
 263   // chrome/browser/chromeos, so it can't be used directly here; use the
 264   // low-level protobuf API instead to just write the name-value pairs.
 265   // The cache file is read by EnterpriseInstallAttributes::ReadCacheFile.
 266   base::FilePath cache_path;
 267   if (!PathService::Get(chromeos::FILE_INSTALL_ATTRIBUTES, &cache_path))
 268     return false;
 269
 270   std::string result;
 271   {
 272     // |result| can be used only after the StringOutputStream goes out of
 273     // scope.
 274     google::protobuf::io::StringOutputStream result_stream(&result);
 275     google::protobuf::io::CodedOutputStream result_output(&result_stream);
 276
 277     // These tags encode a variable-length value on the wire, which can be
 278     // used to encode strings, bytes and messages. We only needs constants
 279     // for tag numbers 1 and 2 (see install_attributes.proto).
 280     const int kVarLengthTag1 = (1 << 3) | 0x2;
 281     const int kVarLengthTag2 = (2 << 3) | 0x2;
 282
 283     typedef std::map<std::string, std::vector<uint8> >::const_iterator Iter;
 284     for (Iter it = install_attrs_.begin(); it != install_attrs_.end(); ++it) {
 285       std::string attr;
 286       {
 287         google::protobuf::io::StringOutputStream attr_stream(&attr);
 288         google::protobuf::io::CodedOutputStream attr_output(&attr_stream);
 289
 290         attr_output.WriteVarint32(kVarLengthTag1);
 291         attr_output.WriteVarint32(it->first.size());
 292         attr_output.WriteString(it->first);
 293         attr_output.WriteVarint32(kVarLengthTag2);
 294         attr_output.WriteVarint32(it->second.size());
 295         attr_output.WriteRaw(it->second.data(), it->second.size());
 296       }
 297
 298       // Two CodedOutputStreams are needed because inner messages must be
 299       // prefixed by their total length, which can't be easily computed before
 300       // writing their tags and values.
 301       result_output.WriteVarint32(kVarLengthTag2);
 302       result_output.WriteVarint32(attr.size());
 303       result_output.WriteRaw(attr.data(), attr.size());
 304     }
 305   }
 306
 307   // The real implementation does a blocking wait on the dbus call; the fake
 308   // implementation must have this file written before returning.
 309   base::ThreadRestrictions::ScopedAllowIO allow_io;
 310   base::WriteFile(cache_path, result.data(), result.size());
 311
 312   return true;
 313 }
 314
 315 void FakeCryptohomeClient::InstallAttributesIsReady(
 316     const BoolDBusMethodCallback& callback) {
 317   base::MessageLoop::current()->PostTask(
 318       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 319 }
 320
 321 bool FakeCryptohomeClient::InstallAttributesIsInvalid(bool* is_invalid) {
 322   *is_invalid = false;
 323   return true;
 324 }
 325
 326 bool FakeCryptohomeClient::InstallAttributesIsFirstInstall(
 327     bool* is_first_install) {
 328   *is_first_install = !locked_;
 329   return true;
 330 }
 331
 332 void FakeCryptohomeClient::TpmAttestationIsPrepared(
 333     const BoolDBusMethodCallback& callback) {
 334   base::MessageLoop::current()->PostTask(
 335       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 336 }
 337
 338 void FakeCryptohomeClient::TpmAttestationIsEnrolled(
 339     const BoolDBusMethodCallback& callback) {
 340   base::MessageLoop::current()->PostTask(
 341       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 342 }
 343
 344 void FakeCryptohomeClient::AsyncTpmAttestationCreateEnrollRequest(
 345     chromeos::attestation::PrivacyCAType pca_type,
 346     const AsyncMethodCallback& callback) {
 347   ReturnAsyncMethodResult(callback, true);
 348 }
 349
 350 void FakeCryptohomeClient::AsyncTpmAttestationEnroll(
 351     chromeos::attestation::PrivacyCAType pca_type,
 352     const std::string& pca_response,
 353     const AsyncMethodCallback& callback) {
 354   ReturnAsyncMethodResult(callback, false);
 355 }
 356
 357 void FakeCryptohomeClient::AsyncTpmAttestationCreateCertRequest(
 358     chromeos::attestation::PrivacyCAType pca_type,
 359     attestation::AttestationCertificateProfile certificate_profile,
 360     const std::string& user_id,
 361     const std::string& request_origin,
 362     const AsyncMethodCallback& callback) {
 363   ReturnAsyncMethodResult(callback, true);
 364 }
 365
 366 void FakeCryptohomeClient::AsyncTpmAttestationFinishCertRequest(
 367     const std::string& pca_response,
 368     attestation::AttestationKeyType key_type,
 369     const std::string& user_id,
 370     const std::string& key_name,
 371     const AsyncMethodCallback& callback) {
 372   ReturnAsyncMethodResult(callback, true);
 373 }
 374
 375 void FakeCryptohomeClient::TpmAttestationDoesKeyExist(
 376     attestation::AttestationKeyType key_type,
 377     const std::string& user_id,
 378     const std::string& key_name,
 379     const BoolDBusMethodCallback& callback) {
 380   base::MessageLoop::current()->PostTask(
 381       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false));
 382 }
 383
 384 void FakeCryptohomeClient::TpmAttestationGetCertificate(
 385     attestation::AttestationKeyType key_type,
 386     const std::string& user_id,
 387     const std::string& key_name,
 388     const DataMethodCallback& callback) {
 389   base::MessageLoop::current()->PostTask(
 390       FROM_HERE,
 391       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false, std::string()));
 392 }
 393
 394 void FakeCryptohomeClient::TpmAttestationGetPublicKey(
 395     attestation::AttestationKeyType key_type,
 396     const std::string& user_id,
 397     const std::string& key_name,
 398     const DataMethodCallback& callback) {
 399   base::MessageLoop::current()->PostTask(
 400       FROM_HERE,
 401       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false, std::string()));
 402 }
 403
 404 void FakeCryptohomeClient::TpmAttestationRegisterKey(
 405     attestation::AttestationKeyType key_type,
 406     const std::string& user_id,
 407     const std::string& key_name,
 408     const AsyncMethodCallback& callback) {
 409   ReturnAsyncMethodResult(callback, true);
 410 }
 411
 412 void FakeCryptohomeClient::TpmAttestationSignEnterpriseChallenge(
 413     attestation::AttestationKeyType key_type,
 414     const std::string& user_id,
 415     const std::string& key_name,
 416     const std::string& domain,
 417     const std::string& device_id,
 418     attestation::AttestationChallengeOptions options,
 419     const std::string& challenge,
 420     const AsyncMethodCallback& callback) {
 421   ReturnAsyncMethodResult(callback, true);
 422 }
 423
 424 void FakeCryptohomeClient::TpmAttestationSignSimpleChallenge(
 425     attestation::AttestationKeyType key_type,
 426     const std::string& user_id,
 427     const std::string& key_name,
 428     const std::string& challenge,
 429     const AsyncMethodCallback& callback) {
 430   ReturnAsyncMethodResult(callback, true);
 431 }
 432
 433 void FakeCryptohomeClient::TpmAttestationGetKeyPayload(
 434     attestation::AttestationKeyType key_type,
 435     const std::string& user_id,
 436     const std::string& key_name,
 437     const DataMethodCallback& callback) {
 438   base::MessageLoop::current()->PostTask(
 439       FROM_HERE,
 440       base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false, std::string()));
 441 }
 442
 443 void FakeCryptohomeClient::TpmAttestationSetKeyPayload(
 444     attestation::AttestationKeyType key_type,
 445     const std::string& user_id,
 446     const std::string& key_name,
 447     const std::string& payload,
 448     const BoolDBusMethodCallback& callback) {
 449   base::MessageLoop::current()->PostTask(
 450       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false));
 451 }
 452
 453 void FakeCryptohomeClient::TpmAttestationDeleteKeys(
 454     attestation::AttestationKeyType key_type,
 455     const std::string& user_id,
 456     const std::string& key_prefix,
 457     const BoolDBusMethodCallback& callback) {
 458   base::MessageLoop::current()->PostTask(
 459       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, false));
 460 }
 461
 462 void FakeCryptohomeClient::GetKeyDataEx(
 463     const cryptohome::AccountIdentifier& id,
 464     const cryptohome::AuthorizationRequest& auth,
 465     const cryptohome::GetKeyDataRequest& request,
 466     const ProtobufMethodCallback& callback) {
 467   cryptohome::BaseReply reply;
 468   reply.MutableExtension(cryptohome::GetKeyDataReply::reply);
 469   ReturnProtobufMethodCallback(reply, callback);
 470 }
 471
 472 void FakeCryptohomeClient::CheckKeyEx(
 473     const cryptohome::AccountIdentifier& id,
 474     const cryptohome::AuthorizationRequest& auth,
 475     const cryptohome::CheckKeyRequest& request,
 476     const ProtobufMethodCallback& callback) {
 477   cryptohome::BaseReply reply;
 478   ReturnProtobufMethodCallback(reply, callback);
 479 }
 480
 481 void FakeCryptohomeClient::MountEx(
 482     const cryptohome::AccountIdentifier& id,
 483     const cryptohome::AuthorizationRequest& auth,
 484     const cryptohome::MountRequest& request,
 485     const ProtobufMethodCallback& callback) {
 486   cryptohome::BaseReply reply;
 487   cryptohome::MountReply* mount =
 488       reply.MutableExtension(cryptohome::MountReply::reply);
 489   mount->set_sanitized_username(GetStubSanitizedUsername(id.email()));
 490   ReturnProtobufMethodCallback(reply, callback);
 491 }
 492
 493 void FakeCryptohomeClient::AddKeyEx(
 494     const cryptohome::AccountIdentifier& id,
 495     const cryptohome::AuthorizationRequest& auth,
 496     const cryptohome::AddKeyRequest& request,
 497     const ProtobufMethodCallback& callback) {
 498   cryptohome::BaseReply reply;
 499   ReturnProtobufMethodCallback(reply, callback);
 500 }
 501
 502 void FakeCryptohomeClient::RemoveKeyEx(
 503     const cryptohome::AccountIdentifier& id,
 504     const cryptohome::AuthorizationRequest& auth,
 505     const cryptohome::RemoveKeyRequest& request,
 506     const ProtobufMethodCallback& callback) {
 507   cryptohome::BaseReply reply;
 508   ReturnProtobufMethodCallback(reply, callback);
 509 }
 510
 511 void FakeCryptohomeClient::UpdateKeyEx(
 512     const cryptohome::AccountIdentifier& id,
 513     const cryptohome::AuthorizationRequest& auth,
 514     const cryptohome::UpdateKeyRequest& request,
 515     const ProtobufMethodCallback& callback) {
 516   cryptohome::BaseReply reply;
 517   ReturnProtobufMethodCallback(reply, callback);
 518 }
 519
 520 void FakeCryptohomeClient::GetBootAttribute(
 521     const cryptohome::GetBootAttributeRequest& request,
 522     const ProtobufMethodCallback& callback) {
 523   cryptohome::BaseReply reply;
 524   cryptohome::GetBootAttributeReply* attr_reply =
 525       reply.MutableExtension(cryptohome::GetBootAttributeReply::reply);
 526   attr_reply->set_value("");
 527   ReturnProtobufMethodCallback(reply, callback);
 528 }
 529
 530 void FakeCryptohomeClient::SetBootAttribute(
 531     const cryptohome::SetBootAttributeRequest& request,
 532     const ProtobufMethodCallback& callback) {
 533   cryptohome::BaseReply reply;
 534   ReturnProtobufMethodCallback(reply, callback);
 535 }
 536
 537 void FakeCryptohomeClient::FlushAndSignBootAttributes(
 538     const cryptohome::FlushAndSignBootAttributesRequest& request,
 539     const ProtobufMethodCallback& callback) {
 540   cryptohome::BaseReply reply;
 541   ReturnProtobufMethodCallback(reply, callback);
 542 }
 543
 544 void FakeCryptohomeClient::SetServiceIsAvailable(bool is_available) {
 545   service_is_available_ = is_available;
 546   if (is_available) {
 547     std::vector<WaitForServiceToBeAvailableCallback> callbacks;
 548     callbacks.swap(pending_wait_for_service_to_be_available_callbacks_);
 549     for (size_t i = 0; i < callbacks.size(); ++i)
 550       callbacks[i].Run(is_available);
 551   }
 552 }
 553
 554 // static
 555 std::vector<uint8> FakeCryptohomeClient::GetStubSystemSalt() {
 556   const char kStubSystemSalt[] = "stub_system_salt";
 557   return std::vector<uint8>(kStubSystemSalt,
 558                             kStubSystemSalt + arraysize(kStubSystemSalt) - 1);
 559 }
 560
 561 void FakeCryptohomeClient::ReturnProtobufMethodCallback(
 562     const cryptohome::BaseReply& reply,
 563     const ProtobufMethodCallback& callback) {
 564   base::MessageLoop::current()->PostTask(
 565       FROM_HERE,
 566       base::Bind(callback,
 567                  DBUS_METHOD_CALL_SUCCESS,
 568                  true,
 569                  reply));
 570 }
 571
 572 void FakeCryptohomeClient::ReturnAsyncMethodResult(
 573     const AsyncMethodCallback& callback,
 574     bool returns_data) {
 575   base::MessageLoop::current()->PostTask(
 576       FROM_HERE,
 577       base::Bind(&FakeCryptohomeClient::ReturnAsyncMethodResultInternal,
 578                  weak_ptr_factory_.GetWeakPtr(),
 579                  callback,
 580                  returns_data));
 581 }
 582
 583 void FakeCryptohomeClient::ReturnAsyncMethodResultInternal(
 584     const AsyncMethodCallback& callback,
 585     bool returns_data) {
 586   callback.Run(async_call_id_);
 587   if (!returns_data && !async_call_status_handler_.is_null()) {
 588     base::MessageLoop::current()->PostTask(
 589         FROM_HERE,
 590         base::Bind(async_call_status_handler_,
 591                    async_call_id_,
 592                    true,
 593                    cryptohome::MOUNT_ERROR_NONE));
 594   } else if (returns_data && !async_call_status_data_handler_.is_null()) {
 595     base::MessageLoop::current()->PostTask(
 596         FROM_HERE,
 597         base::Bind(async_call_status_data_handler_,
 598                    async_call_id_,
 599                    true,
 600                    std::string()));
 601   }
 602   ++async_call_id_;
 603 }
 604
 605 }  // namespace chromeos