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| 1 // Copyright 2014 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 #ifndef CHROMEOS_TPM_PASSWORD_FETCHER_H_ | |
| 6 #define CHROMEOS_TPM_PASSWORD_FETCHER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/memory/weak_ptr.h" | |
| 12 #include "chromeos/chromeos_export.h" | |
| 13 #include "chromeos/dbus/dbus_method_call_status.h" | |
| 14 | |
| 15 namespace chromeos { | |
| 16 | |
| 17 // Interface which TpmPasswordFetcher uses to notify that password has been | |
| 18 // fetched. | |
| 19 class CHROMEOS_EXPORT TpmPasswordFetcherDelegate { | |
| 20 public: | |
| 21 virtual ~TpmPasswordFetcherDelegate() {} | |
| 22 virtual void OnPasswordFetched(const std::string& tpm_password) = 0; | |
| 23 }; | |
| 24 | |
| 25 // Class for fetching TPM password from the Cryptohome. | |
| 26 class CHROMEOS_EXPORT TpmPasswordFetcher { | |
| 27 public: | |
| 28 // Creates fetcher with the given delegate to be notified every time fetching | |
| 29 // is done. | |
| 30 explicit TpmPasswordFetcher(TpmPasswordFetcherDelegate* delegate); | |
| 31 ~TpmPasswordFetcher(); | |
| 32 | |
| 33 // Fetches TPM password and stores the result. Also notifies |delegate_| with | |
| 34 // OnPasswordFetched() call. | |
| 35 void Fetch(); | |
| 36 | |
| 37 private: | |
| 38 // Used to implement Fetch(). | |
| 39 void OnTpmIsReady(DBusMethodCallStatus call_status, bool tpm_is_ready); | |
| 40 | |
| 41 // Used to implement Fetch(). | |
| 42 void OnTpmGetPassword(DBusMethodCallStatus call_status, | |
| 43 const std::string& password); | |
| 44 | |
| 45 // Posts a task to call Fetch() later. | |
| 46 void RescheduleFetch(); | |
| 47 | |
| 48 TpmPasswordFetcherDelegate* delegate_; | |
| 49 | |
| 50 base::WeakPtrFactory<TpmPasswordFetcher> weak_factory_; | |
| 51 | |
| 52 DISALLOW_COPY_AND_ASSIGN(TpmPasswordFetcher); | |
| 53 }; | |
| 54 | |
| 55 } // namespace chromeos | |
| 56 | |
| 57 #endif // CHROMEOS_TPM_PASSWORD_FETCHER_H_ | |
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