| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "device/u2f/u2f_register.h" |
| |
| #include <utility> |
| |
| #include "base/stl_util.h" |
| #include "device/u2f/register_response_data.h" |
| #include "device/u2f/u2f_discovery.h" |
| #include "services/service_manager/public/cpp/connector.h" |
| |
| namespace device { |
| |
| U2fRegister::U2fRegister( |
| const std::vector<std::vector<uint8_t>>& registered_keys, |
| const std::vector<uint8_t>& challenge_hash, |
| const std::vector<uint8_t>& app_param, |
| std::string relying_party_id, |
| std::vector<U2fDiscovery*> discoveries, |
| RegisterResponseCallback completion_callback) |
| : U2fRequest(std::move(relying_party_id), std::move(discoveries)), |
| challenge_hash_(challenge_hash), |
| app_param_(app_param), |
| registered_keys_(registered_keys), |
| completion_callback_(std::move(completion_callback)), |
| weak_factory_(this) {} |
| |
| U2fRegister::~U2fRegister() = default; |
| |
| // static |
| std::unique_ptr<U2fRequest> U2fRegister::TryRegistration( |
| const std::vector<std::vector<uint8_t>>& registered_keys, |
| const std::vector<uint8_t>& challenge_hash, |
| const std::vector<uint8_t>& app_param, |
| std::string relying_party_id, |
| std::vector<U2fDiscovery*> discoveries, |
| RegisterResponseCallback completion_callback) { |
| std::unique_ptr<U2fRequest> request = std::make_unique<U2fRegister>( |
| registered_keys, challenge_hash, app_param, std::move(relying_party_id), |
| std::move(discoveries), std::move(completion_callback)); |
| request->Start(); |
| return request; |
| } |
| |
| void U2fRegister::TryDevice() { |
| DCHECK(current_device_); |
| if (registered_keys_.size() > 0 && !CheckedForDuplicateRegistration()) { |
| auto it = registered_keys_.cbegin(); |
| current_device_->Sign(app_param_, challenge_hash_, *it, |
| base::Bind(&U2fRegister::OnTryCheckRegistration, |
| weak_factory_.GetWeakPtr(), it), |
| true); |
| } else { |
| current_device_->Register(app_param_, challenge_hash_, |
| base::Bind(&U2fRegister::OnTryDevice, |
| weak_factory_.GetWeakPtr(), false)); |
| } |
| } |
| |
| void U2fRegister::OnTryCheckRegistration( |
| std::vector<std::vector<uint8_t>>::const_iterator it, |
| U2fReturnCode return_code, |
| const std::vector<uint8_t>& response_data) { |
| switch (return_code) { |
| case U2fReturnCode::SUCCESS: |
| case U2fReturnCode::CONDITIONS_NOT_SATISFIED: |
| // Duplicate registration found. Call bogus registration to check for |
| // user presence (touch) and terminate the registration process. |
| current_device_->Register(U2fRequest::GetBogusAppParam(), |
| U2fRequest::GetBogusChallenge(), |
| base::Bind(&U2fRegister::OnTryDevice, |
| weak_factory_.GetWeakPtr(), true)); |
| break; |
| |
| case U2fReturnCode::INVALID_PARAMS: |
| // Continue to iterate through the provided key handles in the exclude |
| // list and check for already registered keys. |
| if (++it != registered_keys_.end()) { |
| current_device_->Sign(app_param_, challenge_hash_, *it, |
| base::Bind(&U2fRegister::OnTryCheckRegistration, |
| weak_factory_.GetWeakPtr(), it), |
| true); |
| } else { |
| checked_device_id_list_.insert(current_device_->GetId()); |
| if (devices_.empty()) { |
| // When all devices have been checked, proceed to registration. |
| CompleteNewDeviceRegistration(); |
| } else { |
| state_ = State::IDLE; |
| Transition(); |
| } |
| } |
| break; |
| default: |
| // Some sort of failure occurred. Abandon this device and move on. |
| state_ = State::IDLE; |
| current_device_ = nullptr; |
| Transition(); |
| break; |
| } |
| } |
| |
| void U2fRegister::CompleteNewDeviceRegistration() { |
| if (current_device_) |
| attempted_devices_.push_back(std::move(current_device_)); |
| |
| devices_.splice(devices_.end(), std::move(attempted_devices_)); |
| state_ = State::IDLE; |
| Transition(); |
| return; |
| } |
| |
| bool U2fRegister::CheckedForDuplicateRegistration() { |
| return base::ContainsKey(checked_device_id_list_, current_device_->GetId()); |
| } |
| |
| void U2fRegister::OnTryDevice(bool is_duplicate_registration, |
| U2fReturnCode return_code, |
| const std::vector<uint8_t>& response_data) { |
| switch (return_code) { |
| case U2fReturnCode::SUCCESS: |
| state_ = State::COMPLETE; |
| if (is_duplicate_registration) { |
| std::move(completion_callback_) |
| .Run(U2fReturnCode::CONDITIONS_NOT_SATISFIED, base::nullopt); |
| } else { |
| // TODO(kpaulhamus): Add fuzzers for the response parsers. |
| // https://crbug.com/785957. |
| std::move(completion_callback_) |
| .Run(U2fReturnCode::SUCCESS, |
| RegisterResponseData::CreateFromU2fRegisterResponse( |
| relying_party_id_, std::move(response_data))); |
| } |
| break; |
| case U2fReturnCode::CONDITIONS_NOT_SATISFIED: |
| // Waiting for user touch, move on and try this device later. |
| state_ = State::IDLE; |
| Transition(); |
| break; |
| default: |
| state_ = State::IDLE; |
| // An error has occurred, quit trying this device. |
| current_device_ = nullptr; |
| Transition(); |
| break; |
| } |
| } |
| |
| } // namespace device |