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// 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_TASK_H_
#define DEVICE_FIDO_GET_ASSERTION_TASK_H_
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/callback.h"
#include "base/component_export.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "device/fido/ctap_get_assertion_request.h"
#include "device/fido/ctap_make_credential_request.h"
#include "device/fido/device_operation.h"
#include "device/fido/fido_constants.h"
#include "device/fido/fido_task.h"
namespace cbor {
class Value;
}
namespace device {
class AuthenticatorGetAssertionResponse;
class AuthenticatorMakeCredentialResponse;
// Represents per device sign operation on CTAP1/CTAP2 devices.
// https://fidoalliance.org/specs/fido-v2.0-rd-20161004/fido-client-to-authenticator-protocol-v2.0-rd-20161004.html#authenticatorgetassertion
class COMPONENT_EXPORT(DEVICE_FIDO) GetAssertionTask : public FidoTask {
public:
using GetAssertionTaskCallback = base::OnceCallback<void(
CtapDeviceResponseCode,
base::Optional<AuthenticatorGetAssertionResponse>)>;
using SignOperation = DeviceOperation<CtapGetAssertionRequest,
AuthenticatorGetAssertionResponse>;
using RegisterOperation =
DeviceOperation<CtapMakeCredentialRequest,
AuthenticatorMakeCredentialResponse>;
GetAssertionTask(FidoDevice* device,
CtapGetAssertionRequest request,
GetAssertionTaskCallback callback);
~GetAssertionTask() override;
// FidoTask:
void Cancel() override;
// StringFixupPredicate indicates which fields of a GetAssertion
// response may contain truncated UTF-8 strings. See
// |Ctap2DeviceOperation::CBORPathPredicate|.
static bool StringFixupPredicate(const std::vector<const cbor::Value*>& path);
private:
// FidoTask:
void StartTask() override;
void GetAssertion();
void U2fSign();
CtapGetAssertionRequest NextSilentRequest();
// HandleResponse is the callback to a CTAP2 assertion request that requested
// user-presence.
void HandleResponse(
CtapDeviceResponseCode response_code,
base::Optional<AuthenticatorGetAssertionResponse> response_data);
// HandleResponseToSilentRequest is a callback to a request without user-
// presence requested used to silently probe credentials from the allow list.
void HandleResponseToSilentRequest(
CtapDeviceResponseCode response_code,
base::Optional<AuthenticatorGetAssertionResponse> response_data);
// HandleDummyMakeCredentialComplete is the callback for the dummy credential
// creation request that will be triggered, if needed, to get a touch.
void HandleDummyMakeCredentialComplete(
CtapDeviceResponseCode response_code,
base::Optional<AuthenticatorMakeCredentialResponse> response_data);
CtapGetAssertionRequest request_;
std::unique_ptr<SignOperation> sign_operation_;
std::unique_ptr<RegisterOperation> dummy_register_operation_;
GetAssertionTaskCallback callback_;
size_t current_credential_ = 0;
bool canceled_ = false;
base::WeakPtrFactory<GetAssertionTask> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(GetAssertionTask);
};
} // namespace device
#endif // DEVICE_FIDO_GET_ASSERTION_TASK_H_