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1 // Copyright 2017 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 "u2f_sign.h" | |
6 | |
7 #include "base/memory/ptr_util.h" | |
8 | |
9 namespace device { | |
10 | |
11 U2fSign::U2fSign(std::vector<std::vector<uint8_t>> registered_keys, | |
12 std::vector<uint8_t> challenge_hash, | |
13 std::vector<uint8_t> app_param, | |
14 const ResponseCallback& cb) | |
15 : U2fRequest(cb), | |
16 registered_keys_(registered_keys), | |
17 challenge_hash_(challenge_hash), | |
18 app_param_(app_param), | |
19 weak_factory_(this) {} | |
20 | |
21 U2fSign::~U2fSign() {} | |
22 | |
23 // static | |
24 std::unique_ptr<U2fRequest> U2fSign::TrySign( | |
25 std::vector<std::vector<uint8_t>> registered_keys, | |
26 std::vector<uint8_t> challenge_hash, | |
27 std::vector<uint8_t> app_param, | |
28 const ResponseCallback& cb) { | |
29 std::unique_ptr<U2fRequest> request = | |
30 base::MakeUnique<U2fSign>(registered_keys, challenge_hash, app_param, cb); | |
31 if (request) | |
Reilly Grant (use Gerrit)
2017/04/21 17:19:17
base::MakeUnique does not fail.
Casey Piper
2017/04/21 18:42:26
Acknowledged.
| |
32 request->Start(); | |
33 return request; | |
34 } | |
35 | |
36 void U2fSign::TryDevice() { | |
37 if (!current_device_) | |
38 return; | |
Reilly Grant (use Gerrit)
2017/04/21 17:19:16
DCHECK?
Casey Piper
2017/04/21 18:42:26
Done.
| |
39 | |
40 if (registered_keys_.size() == 0) { | |
41 // Send registration (Fake enroll) if no keys were provided | |
42 current_device_->Register( | |
43 kBogusAppParam, kBogusChallenge, | |
44 base::Bind(&U2fSign::OnTryDevice, weak_factory_.GetWeakPtr(), | |
45 registered_keys_.cbegin())); | |
46 return; | |
47 } | |
48 // Try signing current device with the first registered key | |
49 auto it = registered_keys_.cbegin(); | |
50 current_device_->Sign( | |
51 app_param_, challenge_hash_, *it, | |
52 base::Bind(&U2fSign::OnTryDevice, weak_factory_.GetWeakPtr(), it)); | |
53 } | |
54 | |
55 void U2fSign::OnTryDevice(std::vector<std::vector<uint8_t>>::const_iterator it, | |
56 U2fDevice::ReturnCode return_code, | |
57 std::vector<uint8_t> response_data) { | |
58 switch (return_code) { | |
59 case U2fDevice::ReturnCode::SUCCESS: | |
60 state_ = State::COMPLETE; | |
61 cb_.Run(static_cast<uint8_t>(return_code), response_data); | |
62 break; | |
63 case U2fDevice::ReturnCode::CONDITIONS_NOT_SATISFIED: { | |
64 // Key handle is accepted by this device, but waiting on user touch. Move | |
65 // on and try this device again later. | |
66 state_ = State::IDLE; | |
67 Transition(); | |
68 break; | |
69 } | |
70 case U2fDevice::ReturnCode::INVALID_PARAMS: | |
71 if (++it != registered_keys_.end()) { | |
72 // Key is not for this device. Try signing with the next key. | |
73 current_device_->Sign( | |
74 app_param_, challenge_hash_, *it, | |
75 base::Bind(&U2fSign::OnTryDevice, weak_factory_.GetWeakPtr(), it)); | |
76 } else { | |
77 // No provided key was accepted by this device. Send registration | |
78 // (Fake enroll) request to device. | |
79 current_device_->Register( | |
80 kBogusAppParam, kBogusChallenge, | |
81 base::Bind(&U2fSign::OnTryDevice, weak_factory_.GetWeakPtr(), | |
82 registered_keys_.cbegin())); | |
83 } | |
84 break; | |
85 default: | |
86 // Some sort of failure occured. Abandon this device and move on. | |
87 state_ = State::IDLE; | |
88 current_device_ = nullptr; | |
89 Transition(); | |
90 break; | |
91 } | |
92 } | |
93 | |
94 } // namespace device | |
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