| // 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_FIDO_REQUEST_HANDLER_BASE_H_ |
| #define DEVICE_FIDO_FIDO_REQUEST_HANDLER_BASE_H_ |
| |
| #include <functional> |
| #include <map> |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "base/component_export.h" |
| #include "base/containers/flat_set.h" |
| #include "base/macros.h" |
| #include "base/strings/string_piece_forward.h" |
| #include "device/fido/fido_device_authenticator.h" |
| #include "device/fido/fido_discovery.h" |
| #include "device/fido/fido_transport_protocol.h" |
| |
| namespace service_manager { |
| class Connector; |
| }; // namespace service_manager |
| |
| namespace device { |
| |
| class FidoAuthenticator; |
| class FidoDevice; |
| class FidoTask; |
| |
| // Base class that handles device discovery/removal. Each FidoRequestHandlerBase |
| // is owned by FidoRequestManager and its lifetime is equivalent to that of a |
| // single WebAuthn request. For each authenticator, the per-device work is |
| // carried out by one FidoTask instance, which is constructed on DeviceAdded(), |
| // and destroyed either on DeviceRemoved() or CancelOutgoingTaks(). |
| class COMPONENT_EXPORT(DEVICE_FIDO) FidoRequestHandlerBase |
| : public FidoDiscovery::Observer { |
| public: |
| using AuthenticatorMap = |
| std::map<std::string, std::unique_ptr<FidoAuthenticator>, std::less<>>; |
| using AddPlatformAuthenticatorCallback = |
| base::OnceCallback<std::unique_ptr<FidoAuthenticator>()>; |
| |
| // TODO(https://crbug.com/769631): Remove the dependency on Connector once |
| // device/fido is servicified. |
| FidoRequestHandlerBase( |
| service_manager::Connector* connector, |
| const base::flat_set<FidoTransportProtocol>& transports); |
| FidoRequestHandlerBase( |
| service_manager::Connector* connector, |
| const base::flat_set<FidoTransportProtocol>& transports, |
| AddPlatformAuthenticatorCallback add_platform_authenticator); |
| ~FidoRequestHandlerBase() override; |
| |
| // Triggers cancellation of all per-device FidoTasks, except for the device |
| // with |exclude_device_id|, if one is provided. Cancelled tasks are |
| // immediately removed from |ongoing_tasks_|. |
| // |
| // This function is invoked either when: |
| // (a) the entire WebAuthn API request is canceled or, |
| // (b) a successful response or "invalid state error" is received from the |
| // any one of the connected authenticators, in which case all other |
| // per-device tasks are cancelled. |
| // https://w3c.github.io/webauthn/#iface-pkcredential |
| void CancelOngoingTasks(base::StringPiece exclude_device_id = nullptr); |
| |
| protected: |
| // Subclasses implement this method to dispatch their request onto the given |
| // FidoAuthenticator. The FidoAuthenticator is owned by this |
| // FidoRequestHandler and stored in active_authenticators(). |
| virtual void DispatchRequest(FidoAuthenticator*) = 0; |
| |
| void Start(); |
| |
| // Testing seam to allow unit tests to inject a fake authenticator. |
| virtual std::unique_ptr<FidoDeviceAuthenticator> |
| CreateAuthenticatorFromDevice(FidoDevice* device); |
| |
| AuthenticatorMap& active_authenticators() { return active_authenticators_; } |
| std::vector<std::unique_ptr<FidoDiscovery>>& discoveries() { |
| return discoveries_; |
| } |
| |
| private: |
| // FidoDiscovery::Observer |
| void DiscoveryStarted(FidoDiscovery* discovery, bool success) final; |
| void DeviceAdded(FidoDiscovery* discovery, FidoDevice* device) final; |
| void DeviceRemoved(FidoDiscovery* discovery, FidoDevice* device) final; |
| |
| void AddAuthenticator(std::unique_ptr<FidoAuthenticator> authenticator); |
| |
| void MaybeAddPlatformAuthenticator(); |
| |
| AuthenticatorMap active_authenticators_; |
| std::vector<std::unique_ptr<FidoDiscovery>> discoveries_; |
| |
| AddPlatformAuthenticatorCallback add_platform_authenticator_; |
| DISALLOW_COPY_AND_ASSIGN(FidoRequestHandlerBase); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_FIDO_FIDO_REQUEST_HANDLER_BASE_H_ |