| // Copyright 2018 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. |
| |
| #ifndef DEVICE_FIDO_GET_ASSERTION_REQUEST_HANDLER_H_ |
| #define DEVICE_FIDO_GET_ASSERTION_REQUEST_HANDLER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/optional.h" |
| #include "device/fido/authenticator_get_assertion_response.h" |
| #include "device/fido/ctap_get_assertion_request.h" |
| #include "device/fido/fido_constants.h" |
| #include "device/fido/fido_request_handler_base.h" |
| #include "device/fido/fido_transport_protocol.h" |
| |
| namespace device { |
| |
| class FidoAuthenticator; |
| class FidoDiscoveryFactory; |
| |
| namespace pin { |
| struct RetriesResponse; |
| class TokenResponse; |
| } // namespace pin |
| |
| enum class GetAssertionStatus { |
| kSuccess, |
| kAuthenticatorResponseInvalid, |
| kUserConsentButCredentialNotRecognized, |
| kUserConsentDenied, |
| kAuthenticatorRemovedDuringPINEntry, |
| kSoftPINBlock, |
| kHardPINBlock, |
| kAuthenticatorMissingResidentKeys, |
| // TODO(agl): kAuthenticatorMissingUserVerification can |
| // also be returned when the authenticator supports UV, but |
| // there's no UI support for collecting a PIN. This could |
| // be clearer. |
| kAuthenticatorMissingUserVerification, |
| kWinNotAllowedError, |
| }; |
| |
| class COMPONENT_EXPORT(DEVICE_FIDO) GetAssertionRequestHandler |
| : public FidoRequestHandlerBase { |
| public: |
| using CompletionCallback = base::OnceCallback<void( |
| GetAssertionStatus, |
| base::Optional<std::vector<AuthenticatorGetAssertionResponse>>, |
| const FidoAuthenticator*)>; |
| |
| GetAssertionRequestHandler( |
| FidoDiscoveryFactory* fido_discovery_factory, |
| const base::flat_set<FidoTransportProtocol>& supported_transports, |
| CtapGetAssertionRequest request_parameter, |
| bool allow_skipping_pin_touch, |
| CompletionCallback completion_callback); |
| ~GetAssertionRequestHandler() override; |
| |
| private: |
| enum class State { |
| kWaitingForTouch, |
| kWaitingForSecondTouch, |
| kGettingRetries, |
| kWaitingForPIN, |
| kRequestWithPIN, |
| kReadingMultipleResponses, |
| kFinished, |
| }; |
| |
| // FidoRequestHandlerBase: |
| void DispatchRequest(FidoAuthenticator* authenticator) override; |
| void AuthenticatorAdded(FidoDiscoveryBase* discovery, |
| FidoAuthenticator* authenticator) override; |
| void AuthenticatorRemoved(FidoDiscoveryBase* discovery, |
| FidoAuthenticator* authenticator) override; |
| |
| void HandleResponse( |
| FidoAuthenticator* authenticator, |
| CtapDeviceResponseCode response_code, |
| base::Optional<AuthenticatorGetAssertionResponse> response); |
| void HandleNextResponse( |
| FidoAuthenticator* authenticator, |
| CtapDeviceResponseCode response_code, |
| base::Optional<AuthenticatorGetAssertionResponse> response); |
| void CollectPINThenSendRequest(FidoAuthenticator* authenticator); |
| void StartPINFallbackForInternalUv(FidoAuthenticator* authenticator); |
| void TerminateUnsatisfiableRequestPostTouch(FidoAuthenticator* authenticator); |
| void OnPinRetriesResponse(CtapDeviceResponseCode status, |
| base::Optional<pin::RetriesResponse> response); |
| void OnHavePIN(std::string pin); |
| void OnHavePINToken(CtapDeviceResponseCode status, |
| base::Optional<pin::TokenResponse> response); |
| void OnUvRetriesResponse(CtapDeviceResponseCode status, |
| base::Optional<pin::RetriesResponse> response); |
| void OnHaveUvToken(FidoAuthenticator* authenticator, |
| CtapDeviceResponseCode status, |
| base::Optional<pin::TokenResponse> response); |
| void DispatchRequestWithToken(pin::TokenResponse token); |
| |
| CompletionCallback completion_callback_; |
| State state_ = State::kWaitingForTouch; |
| CtapGetAssertionRequest request_; |
| base::Optional<AndroidClientDataExtensionInput> android_client_data_ext_; |
| // If true, and if at the time the request is dispatched to the first |
| // authenticator no other authenticators are available, the request handler |
| // will skip the initial touch that is usually required to select a PIN |
| // protected authenticator. |
| bool allow_skipping_pin_touch_; |
| // authenticator_ points to the authenticator that will be used for this |
| // operation. It's only set after the user touches an authenticator to select |
| // it, after which point that authenticator will be used exclusively through |
| // requesting PIN etc. The object is owned by the underlying discovery object |
| // and this pointer is cleared if it's removed during processing. |
| FidoAuthenticator* authenticator_ = nullptr; |
| // responses_ holds the set of responses while they are incrementally read |
| // from the device. Only used when more than one response is returned. |
| std::vector<AuthenticatorGetAssertionResponse> responses_; |
| // remaining_responses_ contains the number of responses that remain to be |
| // read when multiple responses are returned. |
| size_t remaining_responses_ = 0; |
| SEQUENCE_CHECKER(my_sequence_checker_); |
| base::WeakPtrFactory<GetAssertionRequestHandler> weak_factory_{this}; |
| |
| DISALLOW_COPY_AND_ASSIGN(GetAssertionRequestHandler); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_FIDO_GET_ASSERTION_REQUEST_HANDLER_H_ |