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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) |
| 32 request->Start(); |
| 33 return request; |
| 34 } |
| 35 |
| 36 void U2fSign::TryDevice() { |
| 37 if (!current_device_) |
| 38 return; |
| 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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