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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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