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Issue 738683002: Move chromeos/tpm_* to chromeos/tpm (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix the build Created 6 years ago
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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 #include "tpm_password_fetcher.h"
6
7 #include "base/bind.h"
8 #include "base/compiler_specific.h"
9 #include "base/message_loop/message_loop.h"
10 #include "chromeos/dbus/cryptohome_client.h"
11 #include "chromeos/dbus/dbus_thread_manager.h"
12
13 namespace chromeos {
14
15 namespace {
16
17 // Interval between TPM password checks.
18 const int kTpmCheckIntervalMs = 500;
19
20 } // namespace
21
22 TpmPasswordFetcher::TpmPasswordFetcher(TpmPasswordFetcherDelegate* delegate)
23 : delegate_(delegate), weak_factory_(this) {
24 DCHECK(delegate_);
25 }
26
27 TpmPasswordFetcher::~TpmPasswordFetcher() {
28 }
29
30 void TpmPasswordFetcher::Fetch() {
31 // Since this method is also called directly.
32 weak_factory_.InvalidateWeakPtrs();
33
34 DBusThreadManager::Get()->GetCryptohomeClient()->TpmIsReady(base::Bind(
35 &TpmPasswordFetcher::OnTpmIsReady, weak_factory_.GetWeakPtr()));
36 }
37
38 void TpmPasswordFetcher::OnTpmIsReady(DBusMethodCallStatus call_status,
39 bool tpm_is_ready) {
40 if (call_status == DBUS_METHOD_CALL_SUCCESS && tpm_is_ready) {
41 DBusThreadManager::Get()->GetCryptohomeClient()->TpmGetPassword(base::Bind(
42 &TpmPasswordFetcher::OnTpmGetPassword, weak_factory_.GetWeakPtr()));
43 } else {
44 // Password hasn't been acquired, reschedule fetch.
45 RescheduleFetch();
46 }
47 }
48
49 void TpmPasswordFetcher::OnTpmGetPassword(DBusMethodCallStatus call_status,
50 const std::string& password) {
51 if (call_status == DBUS_METHOD_CALL_SUCCESS) {
52 if (password.empty()) {
53 // For a fresh OOBE flow TPM is uninitialized,
54 // ownership process is started at the EULA screen,
55 // password is cleared after EULA is accepted.
56 LOG(ERROR) << "TPM returned an empty password.";
57 }
58 delegate_->OnPasswordFetched(password);
59 } else {
60 // Password hasn't been acquired, reschedule fetch.
61 RescheduleFetch();
62 }
63 }
64
65 void TpmPasswordFetcher::RescheduleFetch() {
66 base::MessageLoop::current()->PostDelayedTask(
67 FROM_HERE,
68 base::Bind(&TpmPasswordFetcher::Fetch, weak_factory_.GetWeakPtr()),
69 base::TimeDelta::FromMilliseconds(kTpmCheckIntervalMs));
70 }
71
72 } // namespace chromeos
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