src/chromeos/cryptohome/async_method_caller.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/cryptohome/async_method_caller.h"
   6
   7 #include "base/bind.h"
   8 #include "base/containers/hash_tables.h"
   9 #include "base/location.h"
  10 #include "base/message_loop/message_loop_proxy.h"
  11 #include "chromeos/dbus/cryptohome_client.h"
  12 #include "chromeos/dbus/dbus_thread_manager.h"
  13
  14 using chromeos::DBusThreadManager;
  15
  16 namespace cryptohome {
  17
  18 namespace {
  19
  20 AsyncMethodCaller* g_async_method_caller = NULL;
  21
  22 // The implementation of AsyncMethodCaller
  23 class AsyncMethodCallerImpl : public AsyncMethodCaller {
  24  public:
  25   AsyncMethodCallerImpl() : weak_ptr_factory_(this) {
  26     DBusThreadManager::Get()->GetCryptohomeClient()->SetAsyncCallStatusHandlers(
  27         base::Bind(&AsyncMethodCallerImpl::HandleAsyncResponse,
  28                    weak_ptr_factory_.GetWeakPtr()),
  29         base::Bind(&AsyncMethodCallerImpl::HandleAsyncDataResponse,
  30                    weak_ptr_factory_.GetWeakPtr()));
  31   }
  32
  33   virtual ~AsyncMethodCallerImpl() {
  34     DBusThreadManager::Get()->GetCryptohomeClient()->
  35         ResetAsyncCallStatusHandlers();
  36   }
  37
  38   virtual void AsyncCheckKey(const std::string& user_email,
  39                              const std::string& passhash,
  40                              Callback callback) override {
  41     DBusThreadManager::Get()->GetCryptohomeClient()->
  42         AsyncCheckKey(user_email, passhash, base::Bind(
  43             &AsyncMethodCallerImpl::RegisterAsyncCallback,
  44             weak_ptr_factory_.GetWeakPtr(),
  45             callback,
  46             "Couldn't initiate async check of user's key."));
  47   }
  48
  49   virtual void AsyncMigrateKey(const std::string& user_email,
  50                                const std::string& old_hash,
  51                                const std::string& new_hash,
  52                                Callback callback) override {
  53     DBusThreadManager::Get()->GetCryptohomeClient()->
  54         AsyncMigrateKey(user_email, old_hash, new_hash, base::Bind(
  55             &AsyncMethodCallerImpl::RegisterAsyncCallback,
  56             weak_ptr_factory_.GetWeakPtr(),
  57             callback,
  58             "Couldn't initiate aync migration of user's key"));
  59   }
  60
  61   virtual void AsyncMount(const std::string& user_email,
  62                           const std::string& passhash,
  63                           int flags,
  64                           Callback callback) override {
  65     DBusThreadManager::Get()->GetCryptohomeClient()->
  66         AsyncMount(user_email, passhash, flags, base::Bind(
  67             &AsyncMethodCallerImpl::RegisterAsyncCallback,
  68             weak_ptr_factory_.GetWeakPtr(),
  69             callback,
  70             "Couldn't initiate async mount of cryptohome."));
  71   }
  72
  73   virtual void AsyncAddKey(const std::string& user_email,
  74                            const std::string& passhash,
  75                            const std::string& new_passhash,
  76                            Callback callback) override {
  77     DBusThreadManager::Get()->GetCryptohomeClient()->
  78         AsyncAddKey(user_email, passhash, new_passhash, base::Bind(
  79             &AsyncMethodCallerImpl::RegisterAsyncCallback,
  80             weak_ptr_factory_.GetWeakPtr(),
  81             callback,
  82             "Couldn't initiate async key addition."));
  83   }
  84
  85   virtual void AsyncMountGuest(Callback callback) override {
  86     DBusThreadManager::Get()->GetCryptohomeClient()->
  87         AsyncMountGuest(base::Bind(
  88             &AsyncMethodCallerImpl::RegisterAsyncCallback,
  89             weak_ptr_factory_.GetWeakPtr(),
  90             callback,
  91             "Couldn't initiate async mount of cryptohome."));
  92   }
  93
  94   virtual void AsyncMountPublic(const std::string& public_mount_id,
  95                                 int flags,
  96                                 Callback callback) override {
  97     DBusThreadManager::Get()->GetCryptohomeClient()->
  98         AsyncMountPublic(public_mount_id, flags, base::Bind(
  99             &AsyncMethodCallerImpl::RegisterAsyncCallback,
 100             weak_ptr_factory_.GetWeakPtr(),
 101             callback,
 102             "Couldn't initiate async mount public of cryptohome."));
 103   }
 104
 105   virtual void AsyncRemove(const std::string& user_email,
 106                            Callback callback) override {
 107     DBusThreadManager::Get()->GetCryptohomeClient()->
 108         AsyncRemove(user_email, base::Bind(
 109             &AsyncMethodCallerImpl::RegisterAsyncCallback,
 110             weak_ptr_factory_.GetWeakPtr(),
 111             callback,
 112             "Couldn't initiate async removal of cryptohome."));
 113   }
 114
 115   virtual void AsyncTpmAttestationCreateEnrollRequest(
 116       chromeos::attestation::PrivacyCAType pca_type,
 117       const DataCallback& callback) override {
 118     DBusThreadManager::Get()->GetCryptohomeClient()->
 119         AsyncTpmAttestationCreateEnrollRequest(pca_type, base::Bind(
 120             &AsyncMethodCallerImpl::RegisterAsyncDataCallback,
 121             weak_ptr_factory_.GetWeakPtr(),
 122             callback,
 123             "Couldn't initiate async attestation enroll request."));
 124   }
 125
 126   virtual void AsyncTpmAttestationEnroll(
 127       chromeos::attestation::PrivacyCAType pca_type,
 128       const std::string& pca_response,
 129       const Callback& callback) override {
 130     DBusThreadManager::Get()->GetCryptohomeClient()->
 131         AsyncTpmAttestationEnroll(pca_type, pca_response, base::Bind(
 132             &AsyncMethodCallerImpl::RegisterAsyncCallback,
 133             weak_ptr_factory_.GetWeakPtr(),
 134             callback,
 135             "Couldn't initiate async attestation enroll."));
 136   }
 137
 138   virtual void AsyncTpmAttestationCreateCertRequest(
 139       chromeos::attestation::PrivacyCAType pca_type,
 140       chromeos::attestation::AttestationCertificateProfile certificate_profile,
 141       const std::string& user_id,
 142       const std::string& request_origin,
 143       const DataCallback& callback) override {
 144     DBusThreadManager::Get()->GetCryptohomeClient()->
 145         AsyncTpmAttestationCreateCertRequest(
 146             pca_type,
 147             certificate_profile,
 148             user_id,
 149             request_origin,
 150             base::Bind(&AsyncMethodCallerImpl::RegisterAsyncDataCallback,
 151                        weak_ptr_factory_.GetWeakPtr(),
 152                        callback,
 153                        "Couldn't initiate async attestation cert request."));
 154   }
 155
 156   virtual void AsyncTpmAttestationFinishCertRequest(
 157       const std::string& pca_response,
 158       chromeos::attestation::AttestationKeyType key_type,
 159       const std::string& user_id,
 160       const std::string& key_name,
 161       const DataCallback& callback) override {
 162     DBusThreadManager::Get()->GetCryptohomeClient()->
 163         AsyncTpmAttestationFinishCertRequest(
 164             pca_response,
 165             key_type,
 166             user_id,
 167             key_name,
 168             base::Bind(
 169                 &AsyncMethodCallerImpl::RegisterAsyncDataCallback,
 170                 weak_ptr_factory_.GetWeakPtr(),
 171                 callback,
 172                 "Couldn't initiate async attestation finish cert request."));
 173   }
 174
 175   virtual void TpmAttestationRegisterKey(
 176       chromeos::attestation::AttestationKeyType key_type,
 177       const std::string& user_id,
 178       const std::string& key_name,
 179       const Callback& callback) override {
 180     DBusThreadManager::Get()->GetCryptohomeClient()->
 181         TpmAttestationRegisterKey(
 182             key_type,
 183             user_id,
 184             key_name,
 185             base::Bind(
 186                 &AsyncMethodCallerImpl::RegisterAsyncCallback,
 187                 weak_ptr_factory_.GetWeakPtr(),
 188                 callback,
 189                 "Couldn't initiate async attestation register key."));
 190   }
 191
 192   virtual void TpmAttestationSignEnterpriseChallenge(
 193       chromeos::attestation::AttestationKeyType key_type,
 194       const std::string& user_id,
 195       const std::string& key_name,
 196       const std::string& domain,
 197       const std::string& device_id,
 198       chromeos::attestation::AttestationChallengeOptions options,
 199       const std::string& challenge,
 200       const DataCallback& callback) override {
 201     DBusThreadManager::Get()->GetCryptohomeClient()->
 202         TpmAttestationSignEnterpriseChallenge(
 203             key_type,
 204             user_id,
 205             key_name,
 206             domain,
 207             device_id,
 208             options,
 209             challenge,
 210             base::Bind(
 211                 &AsyncMethodCallerImpl::RegisterAsyncDataCallback,
 212                 weak_ptr_factory_.GetWeakPtr(),
 213                 callback,
 214                 "Couldn't initiate async attestation enterprise challenge."));
 215   }
 216
 217   virtual void TpmAttestationSignSimpleChallenge(
 218       chromeos::attestation::AttestationKeyType key_type,
 219       const std::string& user_id,
 220       const std::string& key_name,
 221       const std::string& challenge,
 222       const DataCallback& callback) override {
 223     DBusThreadManager::Get()->GetCryptohomeClient()->
 224         TpmAttestationSignSimpleChallenge(
 225             key_type,
 226             user_id,
 227             key_name,
 228             challenge,
 229             base::Bind(
 230                 &AsyncMethodCallerImpl::RegisterAsyncDataCallback,
 231                 weak_ptr_factory_.GetWeakPtr(),
 232                 callback,
 233                 "Couldn't initiate async attestation simple challenge."));
 234   }
 235
 236   virtual void AsyncGetSanitizedUsername(
 237       const std::string& user,
 238       const DataCallback& callback) override {
 239     DBusThreadManager::Get()->GetCryptohomeClient()->
 240         GetSanitizedUsername(user,
 241         base::Bind(
 242             &AsyncMethodCallerImpl::GetSanitizedUsernameCallback,
 243             weak_ptr_factory_.GetWeakPtr(),
 244             callback));
 245   }
 246
 247   virtual void GetSanitizedUsernameCallback(
 248       const DataCallback& callback,
 249       const chromeos::DBusMethodCallStatus call_status,
 250       const std::string& result) {
 251     callback.Run(true, result);
 252   }
 253
 254  private:
 255   struct CallbackElement {
 256     CallbackElement() {}
 257     explicit CallbackElement(const AsyncMethodCaller::Callback& callback)
 258         : callback(callback),
 259           proxy(base::MessageLoopProxy::current()) {
 260     }
 261     AsyncMethodCaller::Callback callback;
 262     scoped_refptr<base::MessageLoopProxy> proxy;
 263   };
 264
 265   struct DataCallbackElement {
 266     DataCallbackElement() {}
 267     explicit DataCallbackElement(
 268         const AsyncMethodCaller::DataCallback& callback)
 269         : data_callback(callback),
 270           proxy(base::MessageLoopProxy::current()) {
 271     }
 272     AsyncMethodCaller::DataCallback data_callback;
 273     scoped_refptr<base::MessageLoopProxy> proxy;
 274   };
 275
 276   typedef base::hash_map<int, CallbackElement> CallbackMap;
 277   typedef base::hash_map<int, DataCallbackElement> DataCallbackMap;
 278
 279   // Handles the response for async calls.
 280   // Below is described how async calls work.
 281   // 1. CryptohomeClient::AsyncXXX returns "async ID".
 282   // 2. RegisterAsyncCallback registers the "async ID" with the user-provided
 283   //    callback.
 284   // 3. Cryptohome will return the result asynchronously as a signal with
 285   //    "async ID"
 286   // 4. "HandleAsyncResponse" handles the result signal and call the registered
 287   //    callback associated with the "async ID".
 288   void HandleAsyncResponse(int async_id, bool return_status, int return_code) {
 289     const CallbackMap::iterator it = callback_map_.find(async_id);
 290     if (it == callback_map_.end()) {
 291       LOG(ERROR) << "Received signal for unknown async_id " << async_id;
 292       return;
 293     }
 294     it->second.proxy->PostTask(FROM_HERE,
 295         base::Bind(it->second.callback,
 296                    return_status,
 297                    static_cast<MountError>(return_code)));
 298     callback_map_.erase(it);
 299   }
 300
 301   // Similar to HandleAsyncResponse but for signals with a raw data payload.
 302   void HandleAsyncDataResponse(int async_id,
 303                                bool return_status,
 304                                const std::string& return_data) {
 305     const DataCallbackMap::iterator it = data_callback_map_.find(async_id);
 306     if (it == data_callback_map_.end()) {
 307       LOG(ERROR) << "Received signal for unknown async_id " << async_id;
 308       return;
 309     }
 310     it->second.proxy->PostTask(FROM_HERE,
 311         base::Bind(it->second.data_callback, return_status, return_data));
 312     data_callback_map_.erase(it);
 313   }
 314
 315   // Registers a callback which is called when the result for AsyncXXX is ready.
 316   void RegisterAsyncCallback(
 317       Callback callback, const char* error, int async_id) {
 318     if (async_id == 0) {
 319       LOG(ERROR) << error;
 320       return;
 321     }
 322     VLOG(1) << "Adding handler for " << async_id;
 323     DCHECK_EQ(callback_map_.count(async_id), 0U);
 324     DCHECK_EQ(data_callback_map_.count(async_id), 0U);
 325     callback_map_[async_id] = CallbackElement(callback);
 326   }
 327
 328   // Registers a callback which is called when the result for AsyncXXX is ready.
 329   void RegisterAsyncDataCallback(
 330       DataCallback callback, const char* error, int async_id) {
 331     if (async_id == 0) {
 332       LOG(ERROR) << error;
 333       return;
 334     }
 335     VLOG(1) << "Adding handler for " << async_id;
 336     DCHECK_EQ(callback_map_.count(async_id), 0U);
 337     DCHECK_EQ(data_callback_map_.count(async_id), 0U);
 338     data_callback_map_[async_id] = DataCallbackElement(callback);
 339   }
 340
 341   base::WeakPtrFactory<AsyncMethodCallerImpl> weak_ptr_factory_;
 342   CallbackMap callback_map_;
 343   DataCallbackMap data_callback_map_;
 344
 345   DISALLOW_COPY_AND_ASSIGN(AsyncMethodCallerImpl);
 346 };
 347
 348 }  // namespace
 349
 350 // static
 351 void AsyncMethodCaller::Initialize() {
 352   if (g_async_method_caller) {
 353     LOG(WARNING) << "AsyncMethodCaller was already initialized";
 354     return;
 355   }
 356   g_async_method_caller = new AsyncMethodCallerImpl();
 357   VLOG(1) << "AsyncMethodCaller initialized";
 358 }
 359
 360 // static
 361 void AsyncMethodCaller::InitializeForTesting(
 362     AsyncMethodCaller* async_method_caller) {
 363   if (g_async_method_caller) {
 364     LOG(WARNING) << "AsyncMethodCaller was already initialized";
 365     return;
 366   }
 367   g_async_method_caller = async_method_caller;
 368   VLOG(1) << "AsyncMethodCaller initialized";
 369 }
 370
 371 // static
 372 void AsyncMethodCaller::Shutdown() {
 373   if (!g_async_method_caller) {
 374     LOG(WARNING) << "AsyncMethodCaller::Shutdown() called with NULL manager";
 375     return;
 376   }
 377   delete g_async_method_caller;
 378   g_async_method_caller = NULL;
 379   VLOG(1) << "AsyncMethodCaller Shutdown completed";
 380 }
 381
 382 // static
 383 AsyncMethodCaller* AsyncMethodCaller::GetInstance() {
 384   return g_async_method_caller;
 385 }
 386
 387 }  // namespace cryptohome