src/chromeos/dbus/cryptohome_client.cc

   1 // Copyright (c) 2012 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/cryptohome_client.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "chromeos/cryptohome/async_method_caller.h"
  12 #include "chromeos/dbus/blocking_method_caller.h"
  13 #include "chromeos/dbus/cryptohome/key.pb.h"
  14 #include "chromeos/dbus/cryptohome/rpc.pb.h"
  15 #include "dbus/bus.h"
  16 #include "dbus/message.h"
  17 #include "dbus/object_path.h"
  18 #include "dbus/object_proxy.h"
  19 #include "third_party/cros_system_api/dbus/service_constants.h"
  20
  21 namespace chromeos {
  22
  23 namespace {
  24
  25 // This suffix is appended to user_id to get hash in stub implementation:
  26 // stub_hash = "[user_id]-hash";
  27 static const char kUserIdStubHashSuffix[] = "-hash";
  28
  29 // Timeout for TPM operations. On slow machines it should be larger, than
  30 // default DBus timeout. TPM operations can take up to 80 seconds, so limit
  31 // is 2 minutes.
  32 const int kTpmDBusTimeoutMs = 2 * 60 * 1000;
  33
  34 // The CryptohomeClient implementation.
  35 class CryptohomeClientImpl : public CryptohomeClient {
  36  public:
  37   CryptohomeClientImpl() : proxy_(NULL), weak_ptr_factory_(this) {}
  38
  39   // CryptohomeClient override.
  40   virtual void SetAsyncCallStatusHandlers(
  41       const AsyncCallStatusHandler& handler,
  42       const AsyncCallStatusWithDataHandler& data_handler) override {
  43     async_call_status_handler_ = handler;
  44     async_call_status_data_handler_ = data_handler;
  45   }
  46
  47   // CryptohomeClient override.
  48   virtual void ResetAsyncCallStatusHandlers() override {
  49     async_call_status_handler_.Reset();
  50     async_call_status_data_handler_.Reset();
  51   }
  52
  53   // CryptohomeClient override.
  54   virtual void WaitForServiceToBeAvailable(
  55       const WaitForServiceToBeAvailableCallback& callback) override {
  56     proxy_->WaitForServiceToBeAvailable(callback);
  57   }
  58
  59   // CryptohomeClient override.
  60   virtual void IsMounted(const BoolDBusMethodCallback& callback) override {
  61     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
  62                                  cryptohome::kCryptohomeIsMounted);
  63     CallBoolMethod(&method_call, callback);
  64   }
  65
  66   // CryptohomeClient override.
  67   virtual bool Unmount(bool *success) override {
  68     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
  69                                  cryptohome::kCryptohomeUnmount);
  70     return CallBoolMethodAndBlock(&method_call, success);
  71   }
  72
  73   // CryptohomeClient override.
  74   virtual void AsyncCheckKey(const std::string& username,
  75                              const std::string& key,
  76                              const AsyncMethodCallback& callback) override {
  77     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
  78                                  cryptohome::kCryptohomeAsyncCheckKey);
  79     dbus::MessageWriter writer(&method_call);
  80     writer.AppendString(username);
  81     writer.AppendString(key);
  82     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
  83                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
  84                                   weak_ptr_factory_.GetWeakPtr(),
  85                                   callback));
  86   }
  87
  88   // CryptohomeClient override.
  89   virtual void AsyncMigrateKey(const std::string& username,
  90                                const std::string& from_key,
  91                                const std::string& to_key,
  92                                const AsyncMethodCallback& callback) override {
  93     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
  94                                  cryptohome::kCryptohomeAsyncMigrateKey);
  95     dbus::MessageWriter writer(&method_call);
  96     writer.AppendString(username);
  97     writer.AppendString(from_key);
  98     writer.AppendString(to_key);
  99     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 100                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 101                                   weak_ptr_factory_.GetWeakPtr(),
 102                                   callback));
 103   }
 104
 105   // CryptohomeClient override.
 106   virtual void AsyncRemove(const std::string& username,
 107                            const AsyncMethodCallback& callback) override {
 108     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 109                                  cryptohome::kCryptohomeAsyncRemove);
 110     dbus::MessageWriter writer(&method_call);
 111     writer.AppendString(username);
 112     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 113                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 114                                   weak_ptr_factory_.GetWeakPtr(),
 115                                   callback));
 116   }
 117
 118   // CryptohomeClient override.
 119   virtual void GetSystemSalt(const GetSystemSaltCallback& callback) override {
 120     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 121                                  cryptohome::kCryptohomeGetSystemSalt);
 122     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 123                        base::Bind(&CryptohomeClientImpl::OnGetSystemSalt,
 124                                   weak_ptr_factory_.GetWeakPtr(),
 125                                   callback));
 126   }
 127
 128   // CryptohomeClient override,
 129   virtual void GetSanitizedUsername(
 130       const std::string& username,
 131       const StringDBusMethodCallback& callback) override {
 132     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 133                                  cryptohome::kCryptohomeGetSanitizedUsername);
 134     dbus::MessageWriter writer(&method_call);
 135     writer.AppendString(username);
 136     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 137                        base::Bind(&CryptohomeClientImpl::OnStringMethod,
 138                                   weak_ptr_factory_.GetWeakPtr(),
 139                                   callback));
 140   }
 141
 142   // CryptohomeClient override.
 143   virtual std::string BlockingGetSanitizedUsername(
 144       const std::string& username) override {
 145     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 146                                  cryptohome::kCryptohomeGetSanitizedUsername);
 147     dbus::MessageWriter writer(&method_call);
 148     writer.AppendString(username);
 149
 150     scoped_ptr<dbus::Response> response =
 151         blocking_method_caller_->CallMethodAndBlock(&method_call);
 152
 153     std::string sanitized_username;
 154     if (response) {
 155       dbus::MessageReader reader(response.get());
 156       reader.PopString(&sanitized_username);
 157     }
 158
 159     return sanitized_username;
 160   }
 161
 162   // CryptohomeClient override.
 163   virtual void AsyncMount(const std::string& username,
 164                           const std::string& key,
 165                           int flags,
 166                           const AsyncMethodCallback& callback) override {
 167     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 168                                  cryptohome::kCryptohomeAsyncMount);
 169     dbus::MessageWriter writer(&method_call);
 170     writer.AppendString(username);
 171     writer.AppendString(key);
 172     writer.AppendBool(flags & cryptohome::CREATE_IF_MISSING);
 173     writer.AppendBool(flags & cryptohome::ENSURE_EPHEMERAL);
 174     // deprecated_tracked_subdirectories
 175     writer.AppendArrayOfStrings(std::vector<std::string>());
 176     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 177                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 178                                   weak_ptr_factory_.GetWeakPtr(),
 179                                   callback));
 180   }
 181
 182   // CryptohomeClient override.
 183   virtual void AsyncAddKey(const std::string& username,
 184                            const std::string& key,
 185                            const std::string& new_key,
 186                            const AsyncMethodCallback& callback) override {
 187     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 188                                  cryptohome::kCryptohomeAsyncAddKey);
 189     dbus::MessageWriter writer(&method_call);
 190     writer.AppendString(username);
 191     writer.AppendString(key);
 192     writer.AppendString(new_key);
 193     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 194                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 195                                   weak_ptr_factory_.GetWeakPtr(),
 196                                   callback));
 197   }
 198
 199   // CryptohomeClient override.
 200   virtual void AsyncMountGuest(const AsyncMethodCallback& callback) override {
 201     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 202                                  cryptohome::kCryptohomeAsyncMountGuest);
 203     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 204                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 205                                   weak_ptr_factory_.GetWeakPtr(),
 206                                   callback));
 207   }
 208
 209   // CryptohomeClient override.
 210   virtual void AsyncMountPublic(const std::string& public_mount_id,
 211                                 int flags,
 212                                 const AsyncMethodCallback& callback) override {
 213     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 214                                  cryptohome::kCryptohomeAsyncMountPublic);
 215     dbus::MessageWriter writer(&method_call);
 216     writer.AppendString(public_mount_id);
 217     writer.AppendBool(flags & cryptohome::CREATE_IF_MISSING);
 218     writer.AppendBool(flags & cryptohome::ENSURE_EPHEMERAL);
 219     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 220                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 221                                   weak_ptr_factory_.GetWeakPtr(),
 222                                   callback));
 223   }
 224
 225   // CryptohomeClient override.
 226   virtual void TpmIsReady(const BoolDBusMethodCallback& callback) override {
 227     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 228                                  cryptohome::kCryptohomeTpmIsReady);
 229     CallBoolMethod(&method_call, callback);
 230   }
 231
 232   // CryptohomeClient override.
 233   virtual void TpmIsEnabled(const BoolDBusMethodCallback& callback) override {
 234     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 235                                  cryptohome::kCryptohomeTpmIsEnabled);
 236     CallBoolMethod(&method_call, callback);
 237   }
 238
 239   // CryptohomeClient override.
 240   // TODO(hashimoto): Remove this method. crbug.com/141006
 241   virtual bool CallTpmIsEnabledAndBlock(bool* enabled) override {
 242     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 243                                  cryptohome::kCryptohomeTpmIsEnabled);
 244     return CallBoolMethodAndBlock(&method_call, enabled);
 245   }
 246
 247   // CryptohomeClient override.
 248   virtual void TpmGetPassword(
 249       const StringDBusMethodCallback& callback) override {
 250     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 251                                  cryptohome::kCryptohomeTpmGetPassword);
 252     proxy_->CallMethod(
 253         &method_call, kTpmDBusTimeoutMs ,
 254         base::Bind(&CryptohomeClientImpl::OnStringMethod,
 255                    weak_ptr_factory_.GetWeakPtr(),
 256                    callback));
 257   }
 258
 259   // CryptohomeClient override.
 260   virtual void TpmIsOwned(const BoolDBusMethodCallback& callback) override {
 261     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 262                                  cryptohome::kCryptohomeTpmIsOwned);
 263     CallBoolMethod(&method_call, callback);
 264   }
 265
 266   // CryptohomeClient override.
 267   // TODO(hashimoto): Remove this method. crbug.com/141012
 268   virtual bool CallTpmIsOwnedAndBlock(bool* owned) override {
 269     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 270                                  cryptohome::kCryptohomeTpmIsOwned);
 271     return CallBoolMethodAndBlock(&method_call, owned);
 272   }
 273
 274   // CryptohomeClient override.
 275   virtual void TpmIsBeingOwned(const BoolDBusMethodCallback& callback)
 276       override {
 277     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 278                                  cryptohome::kCryptohomeTpmIsBeingOwned);
 279     CallBoolMethod(&method_call, callback);
 280   }
 281
 282   // CryptohomeClient override.
 283   // TODO(hashimoto): Remove this method. crbug.com/141011
 284   virtual bool CallTpmIsBeingOwnedAndBlock(bool* owning) override {
 285     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 286                                  cryptohome::kCryptohomeTpmIsBeingOwned);
 287     return CallBoolMethodAndBlock(&method_call, owning);
 288   }
 289
 290   // CryptohomeClient override.
 291   virtual void TpmCanAttemptOwnership(
 292       const VoidDBusMethodCallback& callback) override {
 293     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 294                                  cryptohome::kCryptohomeTpmCanAttemptOwnership);
 295     CallVoidMethod(&method_call, callback);
 296   }
 297
 298   // CryptohomeClient overrides.
 299   virtual void TpmClearStoredPassword(const VoidDBusMethodCallback& callback)
 300       override {
 301     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 302                                  cryptohome::kCryptohomeTpmClearStoredPassword);
 303     CallVoidMethod(&method_call, callback);
 304   }
 305
 306   // CryptohomeClient override.
 307   // TODO(hashimoto): Remove this method. crbug.com/141010
 308   virtual bool CallTpmClearStoredPasswordAndBlock() override {
 309     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 310                                  cryptohome::kCryptohomeTpmClearStoredPassword);
 311     scoped_ptr<dbus::Response> response(
 312         blocking_method_caller_->CallMethodAndBlock(&method_call));
 313     return response.get() != NULL;
 314   }
 315
 316   // CryptohomeClient override.
 317   virtual void Pkcs11IsTpmTokenReady(const BoolDBusMethodCallback& callback)
 318       override {
 319     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 320                                  cryptohome::kCryptohomePkcs11IsTpmTokenReady);
 321     CallBoolMethod(&method_call, callback);
 322   }
 323
 324   // CryptohomeClient override.
 325   virtual void Pkcs11GetTpmTokenInfo(
 326       const Pkcs11GetTpmTokenInfoCallback& callback) override {
 327     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 328                                  cryptohome::kCryptohomePkcs11GetTpmTokenInfo);
 329     proxy_->CallMethod(
 330         &method_call, kTpmDBusTimeoutMs ,
 331         base::Bind(
 332             &CryptohomeClientImpl::OnPkcs11GetTpmTokenInfo,
 333             weak_ptr_factory_.GetWeakPtr(),
 334             callback));
 335   }
 336
 337   // CryptohomeClient override.
 338   virtual void Pkcs11GetTpmTokenInfoForUser(
 339       const std::string& user_email,
 340       const Pkcs11GetTpmTokenInfoCallback& callback) override {
 341     dbus::MethodCall method_call(
 342         cryptohome::kCryptohomeInterface,
 343         cryptohome::kCryptohomePkcs11GetTpmTokenInfoForUser);
 344     dbus::MessageWriter writer(&method_call);
 345     writer.AppendString(user_email);
 346     proxy_->CallMethod(
 347         &method_call, kTpmDBusTimeoutMs ,
 348         base::Bind(
 349             &CryptohomeClientImpl::OnPkcs11GetTpmTokenInfoForUser,
 350             weak_ptr_factory_.GetWeakPtr(),
 351             callback));
 352   }
 353
 354   // CryptohomeClient override.
 355   virtual bool InstallAttributesGet(const std::string& name,
 356                                     std::vector<uint8>* value,
 357                                     bool* successful) override {
 358     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 359                                  cryptohome::kCryptohomeInstallAttributesGet);
 360     dbus::MessageWriter writer(&method_call);
 361     writer.AppendString(name);
 362     scoped_ptr<dbus::Response> response(
 363         blocking_method_caller_->CallMethodAndBlock(&method_call));
 364     if (!response.get())
 365       return false;
 366     dbus::MessageReader reader(response.get());
 367     const uint8* bytes = NULL;
 368     size_t length = 0;
 369     if (!reader.PopArrayOfBytes(&bytes, &length) ||
 370         !reader.PopBool(successful))
 371       return false;
 372     value->assign(bytes, bytes + length);
 373     return true;
 374   }
 375
 376   // CryptohomeClient override.
 377   virtual bool InstallAttributesSet(const std::string& name,
 378                                     const std::vector<uint8>& value,
 379                                     bool* successful) override {
 380     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 381                                  cryptohome::kCryptohomeInstallAttributesSet);
 382     dbus::MessageWriter writer(&method_call);
 383     writer.AppendString(name);
 384     writer.AppendArrayOfBytes(value.data(), value.size());
 385     return CallBoolMethodAndBlock(&method_call, successful);
 386   }
 387
 388   // CryptohomeClient override.
 389   virtual bool InstallAttributesFinalize(bool* successful) override {
 390     dbus::MethodCall method_call(
 391         cryptohome::kCryptohomeInterface,
 392         cryptohome::kCryptohomeInstallAttributesFinalize);
 393     return CallBoolMethodAndBlock(&method_call, successful);
 394   }
 395
 396   // CryptohomeClient override.
 397   virtual void InstallAttributesIsReady(const BoolDBusMethodCallback& callback)
 398       override {
 399     dbus::MethodCall method_call(
 400         cryptohome::kCryptohomeInterface,
 401         cryptohome::kCryptohomeInstallAttributesIsReady);
 402     return CallBoolMethod(&method_call, callback);
 403   }
 404
 405   // CryptohomeClient override.
 406   virtual bool InstallAttributesIsInvalid(bool* is_invalid) override {
 407     dbus::MethodCall method_call(
 408         cryptohome::kCryptohomeInterface,
 409         cryptohome::kCryptohomeInstallAttributesIsInvalid);
 410     return CallBoolMethodAndBlock(&method_call, is_invalid);
 411   }
 412
 413   // CryptohomeClient override.
 414   virtual bool InstallAttributesIsFirstInstall(
 415       bool* is_first_install) override {
 416     dbus::MethodCall method_call(
 417         cryptohome::kCryptohomeInterface,
 418         cryptohome::kCryptohomeInstallAttributesIsFirstInstall);
 419     return CallBoolMethodAndBlock(&method_call, is_first_install);
 420   }
 421
 422   // CryptohomeClient override.
 423   virtual void TpmAttestationIsPrepared(
 424         const BoolDBusMethodCallback& callback) override {
 425     dbus::MethodCall method_call(
 426         cryptohome::kCryptohomeInterface,
 427         cryptohome::kCryptohomeTpmIsAttestationPrepared);
 428     return CallBoolMethod(&method_call, callback);
 429   }
 430
 431   // CryptohomeClient override.
 432   virtual void TpmAttestationIsEnrolled(
 433         const BoolDBusMethodCallback& callback) override {
 434     dbus::MethodCall method_call(
 435         cryptohome::kCryptohomeInterface,
 436         cryptohome::kCryptohomeTpmIsAttestationEnrolled);
 437     return CallBoolMethod(&method_call, callback);
 438   }
 439
 440   // CryptohomeClient override.
 441   virtual void AsyncTpmAttestationCreateEnrollRequest(
 442       attestation::PrivacyCAType pca_type,
 443       const AsyncMethodCallback& callback) override {
 444     dbus::MethodCall method_call(
 445         cryptohome::kCryptohomeInterface,
 446         cryptohome::kCryptohomeAsyncTpmAttestationCreateEnrollRequest);
 447     dbus::MessageWriter writer(&method_call);
 448     writer.AppendInt32(pca_type);
 449     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 450                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 451                                   weak_ptr_factory_.GetWeakPtr(),
 452                                   callback));
 453   }
 454
 455   // CryptohomeClient override.
 456   virtual void AsyncTpmAttestationEnroll(
 457       attestation::PrivacyCAType pca_type,
 458       const std::string& pca_response,
 459       const AsyncMethodCallback& callback) override {
 460     dbus::MethodCall method_call(
 461         cryptohome::kCryptohomeInterface,
 462         cryptohome::kCryptohomeAsyncTpmAttestationEnroll);
 463     dbus::MessageWriter writer(&method_call);
 464     writer.AppendInt32(pca_type);
 465     writer.AppendArrayOfBytes(
 466         reinterpret_cast<const uint8*>(pca_response.data()),
 467         pca_response.size());
 468     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 469                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 470                                   weak_ptr_factory_.GetWeakPtr(),
 471                                   callback));
 472   }
 473
 474   // CryptohomeClient override.
 475   virtual void AsyncTpmAttestationCreateCertRequest(
 476       attestation::PrivacyCAType pca_type,
 477       attestation::AttestationCertificateProfile certificate_profile,
 478       const std::string& user_id,
 479       const std::string& request_origin,
 480       const AsyncMethodCallback& callback) override {
 481     dbus::MethodCall method_call(
 482         cryptohome::kCryptohomeInterface,
 483         cryptohome::kCryptohomeAsyncTpmAttestationCreateCertRequest);
 484     dbus::MessageWriter writer(&method_call);
 485     writer.AppendInt32(pca_type);
 486     writer.AppendInt32(certificate_profile);
 487     writer.AppendString(user_id);
 488     writer.AppendString(request_origin);
 489     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 490                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 491                                   weak_ptr_factory_.GetWeakPtr(),
 492                                   callback));
 493   }
 494
 495   // CryptohomeClient override.
 496   virtual void AsyncTpmAttestationFinishCertRequest(
 497       const std::string& pca_response,
 498       attestation::AttestationKeyType key_type,
 499       const std::string& user_id,
 500       const std::string& key_name,
 501       const AsyncMethodCallback& callback) override {
 502     dbus::MethodCall method_call(
 503         cryptohome::kCryptohomeInterface,
 504         cryptohome::kCryptohomeAsyncTpmAttestationFinishCertRequest);
 505     dbus::MessageWriter writer(&method_call);
 506     writer.AppendArrayOfBytes(
 507         reinterpret_cast<const uint8*>(pca_response.data()),
 508         pca_response.size());
 509     bool is_user_specific = (key_type == attestation::KEY_USER);
 510     writer.AppendBool(is_user_specific);
 511     writer.AppendString(user_id);
 512     writer.AppendString(key_name);
 513     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 514                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 515                                   weak_ptr_factory_.GetWeakPtr(),
 516                                   callback));
 517   }
 518
 519   // CryptohomeClient override.
 520   virtual void TpmAttestationDoesKeyExist(
 521       attestation::AttestationKeyType key_type,
 522       const std::string& user_id,
 523       const std::string& key_name,
 524       const BoolDBusMethodCallback& callback) override {
 525     dbus::MethodCall method_call(
 526         cryptohome::kCryptohomeInterface,
 527         cryptohome::kCryptohomeTpmAttestationDoesKeyExist);
 528     dbus::MessageWriter writer(&method_call);
 529     bool is_user_specific = (key_type == attestation::KEY_USER);
 530     writer.AppendBool(is_user_specific);
 531     writer.AppendString(user_id);
 532     writer.AppendString(key_name);
 533     CallBoolMethod(&method_call, callback);
 534   }
 535
 536   // CryptohomeClient override.
 537   virtual void TpmAttestationGetCertificate(
 538       attestation::AttestationKeyType key_type,
 539       const std::string& user_id,
 540       const std::string& key_name,
 541       const DataMethodCallback& callback) override {
 542     dbus::MethodCall method_call(
 543         cryptohome::kCryptohomeInterface,
 544         cryptohome::kCryptohomeTpmAttestationGetCertificate);
 545     dbus::MessageWriter writer(&method_call);
 546     bool is_user_specific = (key_type == attestation::KEY_USER);
 547     writer.AppendBool(is_user_specific);
 548     writer.AppendString(user_id);
 549     writer.AppendString(key_name);
 550     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 551                        base::Bind(&CryptohomeClientImpl::OnDataMethod,
 552                                   weak_ptr_factory_.GetWeakPtr(),
 553                                   callback));
 554   }
 555
 556   // CryptohomeClient override.
 557   virtual void TpmAttestationGetPublicKey(
 558       attestation::AttestationKeyType key_type,
 559       const std::string& user_id,
 560       const std::string& key_name,
 561       const DataMethodCallback& callback) override {
 562     dbus::MethodCall method_call(
 563         cryptohome::kCryptohomeInterface,
 564         cryptohome::kCryptohomeTpmAttestationGetPublicKey);
 565     dbus::MessageWriter writer(&method_call);
 566     bool is_user_specific = (key_type == attestation::KEY_USER);
 567     writer.AppendBool(is_user_specific);
 568     writer.AppendString(user_id);
 569     writer.AppendString(key_name);
 570     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 571                        base::Bind(&CryptohomeClientImpl::OnDataMethod,
 572                                   weak_ptr_factory_.GetWeakPtr(),
 573                                   callback));
 574   }
 575
 576   // CryptohomeClient override.
 577   virtual void TpmAttestationRegisterKey(
 578       attestation::AttestationKeyType key_type,
 579       const std::string& user_id,
 580       const std::string& key_name,
 581       const AsyncMethodCallback& callback) override {
 582     dbus::MethodCall method_call(
 583         cryptohome::kCryptohomeInterface,
 584         cryptohome::kCryptohomeTpmAttestationRegisterKey);
 585     dbus::MessageWriter writer(&method_call);
 586     bool is_user_specific = (key_type == attestation::KEY_USER);
 587     writer.AppendBool(is_user_specific);
 588     writer.AppendString(user_id);
 589     writer.AppendString(key_name);
 590     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 591                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 592                                   weak_ptr_factory_.GetWeakPtr(),
 593                                   callback));
 594   }
 595
 596   // CryptohomeClient override.
 597   virtual void TpmAttestationSignEnterpriseChallenge(
 598       attestation::AttestationKeyType key_type,
 599       const std::string& user_id,
 600       const std::string& key_name,
 601       const std::string& domain,
 602       const std::string& device_id,
 603       attestation::AttestationChallengeOptions options,
 604       const std::string& challenge,
 605       const AsyncMethodCallback& callback) override {
 606     dbus::MethodCall method_call(
 607         cryptohome::kCryptohomeInterface,
 608         cryptohome::kCryptohomeTpmAttestationSignEnterpriseChallenge);
 609     dbus::MessageWriter writer(&method_call);
 610     bool is_user_specific = (key_type == attestation::KEY_USER);
 611     writer.AppendBool(is_user_specific);
 612     writer.AppendString(user_id);
 613     writer.AppendString(key_name);
 614     writer.AppendString(domain);
 615     writer.AppendArrayOfBytes(reinterpret_cast<const uint8*>(device_id.data()),
 616                               device_id.size());
 617     bool include_signed_public_key =
 618         (options & attestation::CHALLENGE_INCLUDE_SIGNED_PUBLIC_KEY);
 619     writer.AppendBool(include_signed_public_key);
 620     writer.AppendArrayOfBytes(reinterpret_cast<const uint8*>(challenge.data()),
 621                               challenge.size());
 622     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 623                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 624                                   weak_ptr_factory_.GetWeakPtr(),
 625                                   callback));
 626   }
 627
 628   // CryptohomeClient override.
 629   virtual void TpmAttestationSignSimpleChallenge(
 630       attestation::AttestationKeyType key_type,
 631       const std::string& user_id,
 632       const std::string& key_name,
 633       const std::string& challenge,
 634       const AsyncMethodCallback& callback) override {
 635     dbus::MethodCall method_call(
 636         cryptohome::kCryptohomeInterface,
 637         cryptohome::kCryptohomeTpmAttestationSignSimpleChallenge);
 638     dbus::MessageWriter writer(&method_call);
 639     bool is_user_specific = (key_type == attestation::KEY_USER);
 640     writer.AppendBool(is_user_specific);
 641     writer.AppendString(user_id);
 642     writer.AppendString(key_name);
 643     writer.AppendArrayOfBytes(reinterpret_cast<const uint8*>(challenge.data()),
 644                               challenge.size());
 645     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 646                        base::Bind(&CryptohomeClientImpl::OnAsyncMethodCall,
 647                                   weak_ptr_factory_.GetWeakPtr(),
 648                                   callback));
 649   }
 650
 651   // CryptohomeClient override.
 652   virtual void TpmAttestationGetKeyPayload(
 653       attestation::AttestationKeyType key_type,
 654       const std::string& user_id,
 655       const std::string& key_name,
 656       const DataMethodCallback& callback) override {
 657     dbus::MethodCall method_call(
 658         cryptohome::kCryptohomeInterface,
 659         cryptohome::kCryptohomeTpmAttestationGetKeyPayload);
 660     dbus::MessageWriter writer(&method_call);
 661     bool is_user_specific = (key_type == attestation::KEY_USER);
 662     writer.AppendBool(is_user_specific);
 663     writer.AppendString(user_id);
 664     writer.AppendString(key_name);
 665     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 666                        base::Bind(&CryptohomeClientImpl::OnDataMethod,
 667                                   weak_ptr_factory_.GetWeakPtr(),
 668                                   callback));
 669   }
 670
 671   // CryptohomeClient override.
 672   virtual void TpmAttestationSetKeyPayload(
 673       attestation::AttestationKeyType key_type,
 674       const std::string& user_id,
 675       const std::string& key_name,
 676       const std::string& payload,
 677       const BoolDBusMethodCallback& callback) override {
 678     dbus::MethodCall method_call(
 679         cryptohome::kCryptohomeInterface,
 680         cryptohome::kCryptohomeTpmAttestationSetKeyPayload);
 681     dbus::MessageWriter writer(&method_call);
 682     bool is_user_specific = (key_type == attestation::KEY_USER);
 683     writer.AppendBool(is_user_specific);
 684     writer.AppendString(user_id);
 685     writer.AppendString(key_name);
 686     writer.AppendArrayOfBytes(reinterpret_cast<const uint8*>(payload.data()),
 687                               payload.size());
 688     CallBoolMethod(&method_call, callback);
 689   }
 690
 691   // CryptohomeClient override.
 692   virtual void TpmAttestationDeleteKeys(
 693       attestation::AttestationKeyType key_type,
 694       const std::string& user_id,
 695       const std::string& key_prefix,
 696       const BoolDBusMethodCallback& callback) override {
 697     dbus::MethodCall method_call(
 698         cryptohome::kCryptohomeInterface,
 699         cryptohome::kCryptohomeTpmAttestationDeleteKeys);
 700     dbus::MessageWriter writer(&method_call);
 701     bool is_user_specific = (key_type == attestation::KEY_USER);
 702     writer.AppendBool(is_user_specific);
 703     writer.AppendString(user_id);
 704     writer.AppendString(key_prefix);
 705     CallBoolMethod(&method_call, callback);
 706   }
 707
 708   virtual void GetKeyDataEx(
 709       const cryptohome::AccountIdentifier& id,
 710       const cryptohome::AuthorizationRequest& auth,
 711       const cryptohome::GetKeyDataRequest& request,
 712       const ProtobufMethodCallback& callback) override {
 713     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 714                                  cryptohome::kCryptohomeGetKeyDataEx);
 715     dbus::MessageWriter writer(&method_call);
 716     writer.AppendProtoAsArrayOfBytes(id);
 717     writer.AppendProtoAsArrayOfBytes(auth);
 718     writer.AppendProtoAsArrayOfBytes(request);
 719
 720     proxy_->CallMethod(&method_call,
 721                        kTpmDBusTimeoutMs,
 722                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 723                                   weak_ptr_factory_.GetWeakPtr(),
 724                                   callback));
 725   }
 726
 727   virtual void CheckKeyEx(
 728       const cryptohome::AccountIdentifier& id,
 729       const cryptohome::AuthorizationRequest& auth,
 730       const cryptohome::CheckKeyRequest& request,
 731       const ProtobufMethodCallback& callback) override {
 732     const char* method_name = cryptohome::kCryptohomeCheckKeyEx;
 733     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 734                                  method_name);
 735
 736     dbus::MessageWriter writer(&method_call);
 737     writer.AppendProtoAsArrayOfBytes(id);
 738     writer.AppendProtoAsArrayOfBytes(auth);
 739     writer.AppendProtoAsArrayOfBytes(request);
 740
 741     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 742                         base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 743                                    weak_ptr_factory_.GetWeakPtr(),
 744                                    callback));
 745   }
 746
 747   virtual void MountEx(
 748       const cryptohome::AccountIdentifier& id,
 749       const cryptohome::AuthorizationRequest& auth,
 750       const cryptohome::MountRequest& request,
 751       const ProtobufMethodCallback& callback) override {
 752     const char* method_name = cryptohome::kCryptohomeMountEx;
 753     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 754                                  method_name);
 755
 756     dbus::MessageWriter writer(&method_call);
 757     writer.AppendProtoAsArrayOfBytes(id);
 758     writer.AppendProtoAsArrayOfBytes(auth);
 759     writer.AppendProtoAsArrayOfBytes(request);
 760
 761     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs ,
 762                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 763                                   weak_ptr_factory_.GetWeakPtr(),
 764                                   callback));
 765   }
 766
 767   virtual void AddKeyEx(
 768       const cryptohome::AccountIdentifier& id,
 769       const cryptohome::AuthorizationRequest& auth,
 770       const cryptohome::AddKeyRequest& request,
 771       const ProtobufMethodCallback& callback) override {
 772     const char* method_name = cryptohome::kCryptohomeAddKeyEx;
 773     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 774                                  method_name);
 775
 776     dbus::MessageWriter writer(&method_call);
 777     writer.AppendProtoAsArrayOfBytes(id);
 778     writer.AppendProtoAsArrayOfBytes(auth);
 779     writer.AppendProtoAsArrayOfBytes(request);
 780
 781     proxy_->CallMethod(&method_call, kTpmDBusTimeoutMs,
 782                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 783                                   weak_ptr_factory_.GetWeakPtr(),
 784                                   callback));
 785   }
 786
 787   virtual void UpdateKeyEx(
 788       const cryptohome::AccountIdentifier& id,
 789       const cryptohome::AuthorizationRequest& auth,
 790       const cryptohome::UpdateKeyRequest& request,
 791       const ProtobufMethodCallback& callback) override {
 792     const char* method_name = cryptohome::kCryptohomeUpdateKeyEx;
 793     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
 794                                  method_name);
 795
 796     dbus::MessageWriter writer(&method_call);
 797     writer.AppendProtoAsArrayOfBytes(id);
 798     writer.AppendProtoAsArrayOfBytes(auth);
 799     writer.AppendProtoAsArrayOfBytes(request);
 800
 801     proxy_->CallMethod(&method_call,
 802                        kTpmDBusTimeoutMs ,
 803                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 804                                   weak_ptr_factory_.GetWeakPtr(),
 805                                   callback));
 806   }
 807
 808   virtual void RemoveKeyEx(const cryptohome::AccountIdentifier& id,
 809                            const cryptohome::AuthorizationRequest& auth,
 810                            const cryptohome::RemoveKeyRequest& request,
 811                            const ProtobufMethodCallback& callback) override {
 812     const char* method_name = cryptohome::kCryptohomeRemoveKeyEx;
 813     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface, method_name);
 814
 815     dbus::MessageWriter writer(&method_call);
 816     writer.AppendProtoAsArrayOfBytes(id);
 817     writer.AppendProtoAsArrayOfBytes(auth);
 818     writer.AppendProtoAsArrayOfBytes(request);
 819
 820     proxy_->CallMethod(&method_call,
 821                        kTpmDBusTimeoutMs ,
 822                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 823                                   weak_ptr_factory_.GetWeakPtr(),
 824                                   callback));
 825   }
 826
 827   virtual void GetBootAttribute(
 828       const cryptohome::GetBootAttributeRequest& request,
 829       const ProtobufMethodCallback& callback) override {
 830     const char* method_name = cryptohome::kCryptohomeGetBootAttribute;
 831     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface, method_name);
 832
 833     dbus::MessageWriter writer(&method_call);
 834     writer.AppendProtoAsArrayOfBytes(request);
 835
 836     proxy_->CallMethod(&method_call,
 837                        kTpmDBusTimeoutMs ,
 838                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 839                                   weak_ptr_factory_.GetWeakPtr(),
 840                                   callback));
 841   }
 842
 843   virtual void SetBootAttribute(
 844       const cryptohome::SetBootAttributeRequest& request,
 845       const ProtobufMethodCallback& callback) override {
 846     const char* method_name = cryptohome::kCryptohomeSetBootAttribute;
 847     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface, method_name);
 848
 849     dbus::MessageWriter writer(&method_call);
 850     writer.AppendProtoAsArrayOfBytes(request);
 851
 852     proxy_->CallMethod(&method_call,
 853                        kTpmDBusTimeoutMs ,
 854                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 855                                   weak_ptr_factory_.GetWeakPtr(),
 856                                   callback));
 857   }
 858
 859   virtual void FlushAndSignBootAttributes(
 860       const cryptohome::FlushAndSignBootAttributesRequest& request,
 861       const ProtobufMethodCallback& callback) override {
 862     const char* method_name = cryptohome::kCryptohomeFlushAndSignBootAttributes;
 863     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface, method_name);
 864
 865     dbus::MessageWriter writer(&method_call);
 866     writer.AppendProtoAsArrayOfBytes(request);
 867
 868     proxy_->CallMethod(&method_call,
 869                        kTpmDBusTimeoutMs ,
 870                        base::Bind(&CryptohomeClientImpl::OnBaseReplyMethod,
 871                                   weak_ptr_factory_.GetWeakPtr(),
 872                                   callback));
 873   }
 874
 875  protected:
 876   virtual void Init(dbus::Bus* bus) override {
 877     proxy_ = bus->GetObjectProxy(
 878         cryptohome::kCryptohomeServiceName,
 879         dbus::ObjectPath(cryptohome::kCryptohomeServicePath));
 880
 881     blocking_method_caller_.reset(new BlockingMethodCaller(bus, proxy_));
 882
 883     proxy_->ConnectToSignal(cryptohome::kCryptohomeInterface,
 884                             cryptohome::kSignalAsyncCallStatus,
 885                             base::Bind(&CryptohomeClientImpl::OnAsyncCallStatus,
 886                                        weak_ptr_factory_.GetWeakPtr()),
 887                             base::Bind(&CryptohomeClientImpl::OnSignalConnected,
 888                                        weak_ptr_factory_.GetWeakPtr()));
 889     proxy_->ConnectToSignal(
 890         cryptohome::kCryptohomeInterface,
 891         cryptohome::kSignalAsyncCallStatusWithData,
 892         base::Bind(&CryptohomeClientImpl::OnAsyncCallStatusWithData,
 893                    weak_ptr_factory_.GetWeakPtr()),
 894         base::Bind(&CryptohomeClientImpl::OnSignalConnected,
 895                    weak_ptr_factory_.GetWeakPtr()));
 896   }
 897
 898  private:
 899   // Handles the result of AsyncXXX methods.
 900   void OnAsyncMethodCall(const AsyncMethodCallback& callback,
 901                          dbus::Response* response) {
 902     if (!response)
 903       return;
 904     dbus::MessageReader reader(response);
 905     int async_id = 0;
 906     if (!reader.PopInt32(&async_id)) {
 907       LOG(ERROR) << "Invalid response: " << response->ToString();
 908       return;
 909     }
 910     callback.Run(async_id);
 911   }
 912
 913   // Handles the result of GetSystemSalt().
 914   void OnGetSystemSalt(const GetSystemSaltCallback& callback,
 915                        dbus::Response* response) {
 916     if (!response) {
 917       callback.Run(DBUS_METHOD_CALL_FAILURE, std::vector<uint8>());
 918       return;
 919     }
 920     dbus::MessageReader reader(response);
 921     const uint8* bytes = NULL;
 922     size_t length = 0;
 923     if (!reader.PopArrayOfBytes(&bytes, &length)) {
 924       callback.Run(DBUS_METHOD_CALL_FAILURE, std::vector<uint8>());
 925       return;
 926     }
 927     callback.Run(DBUS_METHOD_CALL_SUCCESS,
 928                  std::vector<uint8>(bytes, bytes + length));
 929   }
 930
 931   // Calls a method without result values.
 932   void CallVoidMethod(dbus::MethodCall* method_call,
 933                       const VoidDBusMethodCallback& callback) {
 934     proxy_->CallMethod(method_call, kTpmDBusTimeoutMs ,
 935                        base::Bind(&CryptohomeClientImpl::OnVoidMethod,
 936                                   weak_ptr_factory_.GetWeakPtr(),
 937                                   callback));
 938   }
 939
 940   void OnVoidMethod(const VoidDBusMethodCallback& callback,
 941                     dbus::Response* response) {
 942     if (!response) {
 943       callback.Run(DBUS_METHOD_CALL_FAILURE);
 944       return;
 945     }
 946     callback.Run(DBUS_METHOD_CALL_SUCCESS);
 947   }
 948
 949   // Calls a method with a bool value reult and block.
 950   bool CallBoolMethodAndBlock(dbus::MethodCall* method_call,
 951                               bool* result) {
 952     scoped_ptr<dbus::Response> response(
 953         blocking_method_caller_->CallMethodAndBlock(method_call));
 954     if (!response.get())
 955       return false;
 956     dbus::MessageReader reader(response.get());
 957     return reader.PopBool(result);
 958   }
 959
 960   // Calls a method with a bool value result.
 961   void CallBoolMethod(dbus::MethodCall* method_call,
 962                       const BoolDBusMethodCallback& callback) {
 963     proxy_->CallMethod(method_call, kTpmDBusTimeoutMs ,
 964                        base::Bind(
 965                            &CryptohomeClientImpl::OnBoolMethod,
 966                            weak_ptr_factory_.GetWeakPtr(),
 967                            callback));
 968   }
 969
 970   // Handles responses for methods with a bool value result.
 971   void OnBoolMethod(const BoolDBusMethodCallback& callback,
 972                     dbus::Response* response) {
 973     if (!response) {
 974       callback.Run(DBUS_METHOD_CALL_FAILURE, false);
 975       return;
 976     }
 977     dbus::MessageReader reader(response);
 978     bool result = false;
 979     if (!reader.PopBool(&result)) {
 980       callback.Run(DBUS_METHOD_CALL_FAILURE, false);
 981       LOG(ERROR) << "Invalid response: " << response->ToString();
 982       return;
 983     }
 984     callback.Run(DBUS_METHOD_CALL_SUCCESS, result);
 985   }
 986
 987   // Handles responses for methods with a string value result.
 988   void OnStringMethod(const StringDBusMethodCallback& callback,
 989                       dbus::Response* response) {
 990     if (!response) {
 991       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string());
 992       return;
 993     }
 994     dbus::MessageReader reader(response);
 995     std::string result;
 996     if (!reader.PopString(&result)) {
 997       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string());
 998       return;
 999     }
1000     callback.Run(DBUS_METHOD_CALL_SUCCESS, result);
1001   }
1002
1003   // Handles responses for methods with a bool result and data.
1004   void OnDataMethod(const DataMethodCallback& callback,
1005                     dbus::Response* response) {
1006     if (!response) {
1007       callback.Run(DBUS_METHOD_CALL_FAILURE, false, std::string());
1008       return;
1009     }
1010     dbus::MessageReader reader(response);
1011     const uint8* data_buffer = NULL;
1012     size_t data_length = 0;
1013     bool result = false;
1014     if (!reader.PopArrayOfBytes(&data_buffer, &data_length) ||
1015         !reader.PopBool(&result)) {
1016       callback.Run(DBUS_METHOD_CALL_FAILURE, false, std::string());
1017       return;
1018     }
1019     std::string data(reinterpret_cast<const char*>(data_buffer), data_length);
1020     callback.Run(DBUS_METHOD_CALL_SUCCESS, result, data);
1021   }
1022
1023   // Handles responses for methods with a BaseReply protobuf method.
1024   void OnBaseReplyMethod(const ProtobufMethodCallback& callback,
1025                          dbus::Response* response) {
1026     cryptohome::BaseReply reply;
1027     if (!response) {
1028       callback.Run(DBUS_METHOD_CALL_FAILURE, false, reply);
1029       return;
1030     }
1031     dbus::MessageReader reader(response);
1032     if (!reader.PopArrayOfBytesAsProto(&reply)) {
1033       callback.Run(DBUS_METHOD_CALL_FAILURE, false, reply);
1034       return;
1035     }
1036     callback.Run(DBUS_METHOD_CALL_SUCCESS, true, reply);
1037   }
1038
1039   // Handles responses for Pkcs11GetTpmTokenInfo.
1040   void OnPkcs11GetTpmTokenInfo(const Pkcs11GetTpmTokenInfoCallback& callback,
1041                                dbus::Response* response) {
1042     if (!response) {
1043       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string(), std::string(), -1);
1044       return;
1045     }
1046     dbus::MessageReader reader(response);
1047     std::string label;
1048     std::string user_pin;
1049     if (!reader.PopString(&label) || !reader.PopString(&user_pin)) {
1050       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string(), std::string(), -1);
1051       LOG(ERROR) << "Invalid response: " << response->ToString();
1052       return;
1053     }
1054     const int kDefaultSlot = 0;
1055     callback.Run(DBUS_METHOD_CALL_SUCCESS, label, user_pin, kDefaultSlot);
1056   }
1057
1058   // Handles responses for Pkcs11GetTpmTokenInfoForUser.
1059   void OnPkcs11GetTpmTokenInfoForUser(
1060       const Pkcs11GetTpmTokenInfoCallback& callback,
1061       dbus::Response* response) {
1062     if (!response) {
1063       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string(), std::string(), -1);
1064       return;
1065     }
1066     dbus::MessageReader reader(response);
1067     std::string label;
1068     std::string user_pin;
1069     int slot = 0;
1070     if (!reader.PopString(&label) || !reader.PopString(&user_pin) ||
1071         !reader.PopInt32(&slot)) {
1072       callback.Run(DBUS_METHOD_CALL_FAILURE, std::string(), std::string(), -1);
1073       LOG(ERROR) << "Invalid response: " << response->ToString();
1074       return;
1075     }
1076     callback.Run(DBUS_METHOD_CALL_SUCCESS, label, user_pin, slot);
1077   }
1078
1079   // Handles AsyncCallStatus signal.
1080   void OnAsyncCallStatus(dbus::Signal* signal) {
1081     dbus::MessageReader reader(signal);
1082     int async_id = 0;
1083     bool return_status = false;
1084     int return_code = 0;
1085     if (!reader.PopInt32(&async_id) ||
1086         !reader.PopBool(&return_status) ||
1087         !reader.PopInt32(&return_code)) {
1088       LOG(ERROR) << "Invalid signal: " << signal->ToString();
1089       return;
1090     }
1091     if (!async_call_status_handler_.is_null())
1092       async_call_status_handler_.Run(async_id, return_status, return_code);
1093   }
1094
1095   // Handles AsyncCallStatusWithData signal.
1096   void OnAsyncCallStatusWithData(dbus::Signal* signal) {
1097     dbus::MessageReader reader(signal);
1098     int async_id = 0;
1099     bool return_status = false;
1100     const uint8* return_data_buffer = NULL;
1101     size_t return_data_length = 0;
1102     if (!reader.PopInt32(&async_id) ||
1103         !reader.PopBool(&return_status) ||
1104         !reader.PopArrayOfBytes(&return_data_buffer, &return_data_length)) {
1105       LOG(ERROR) << "Invalid signal: " << signal->ToString();
1106       return;
1107     }
1108     if (!async_call_status_data_handler_.is_null()) {
1109       std::string return_data(reinterpret_cast<const char*>(return_data_buffer),
1110                               return_data_length);
1111       async_call_status_data_handler_.Run(async_id, return_status, return_data);
1112     }
1113   }
1114
1115   // Handles the result of signal connection setup.
1116   void OnSignalConnected(const std::string& interface,
1117                          const std::string& signal,
1118                          bool succeeded) {
1119     LOG_IF(ERROR, !succeeded) << "Connect to " << interface << " " <<
1120         signal << " failed.";
1121   }
1122
1123   dbus::ObjectProxy* proxy_;
1124   scoped_ptr<BlockingMethodCaller> blocking_method_caller_;
1125   AsyncCallStatusHandler async_call_status_handler_;
1126   AsyncCallStatusWithDataHandler async_call_status_data_handler_;
1127
1128   // Note: This should remain the last member so it'll be destroyed and
1129   // invalidate its weak pointers before any other members are destroyed.
1130   base::WeakPtrFactory<CryptohomeClientImpl> weak_ptr_factory_;
1131
1132   DISALLOW_COPY_AND_ASSIGN(CryptohomeClientImpl);
1133 };
1134
1135 }  // namespace
1136
1137 ////////////////////////////////////////////////////////////////////////////////
1138 // CryptohomeClient
1139
1140 CryptohomeClient::CryptohomeClient() {}
1141
1142 CryptohomeClient::~CryptohomeClient() {}
1143
1144 // static
1145 CryptohomeClient* CryptohomeClient::Create() {
1146   return new CryptohomeClientImpl();
1147 }
1148
1149 // static
1150 std::string CryptohomeClient::GetStubSanitizedUsername(
1151     const std::string& username) {
1152   return username + kUserIdStubHashSuffix;
1153 }
1154
1155 }  // namespace chromeos