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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_MAKE_CREDENTIAL_TASK_H_
#define DEVICE_FIDO_MAKE_CREDENTIAL_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/authenticator_get_assertion_response.h"
#include "device/fido/authenticator_make_credential_response.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 device {
// Represents one register operation on one single CTAP 1.0/2.0 authenticator.
// https://fidoalliance.org/specs/fido-v2.0-rd-20161004/fido-client-to-authenticator-protocol-v2.0-rd-20161004.html#authenticatormakecredential
class COMPONENT_EXPORT(DEVICE_FIDO) MakeCredentialTask : public FidoTask {
public:
using MakeCredentialTaskCallback = base::OnceCallback<void(
CtapDeviceResponseCode,
base::Optional<AuthenticatorMakeCredentialResponse>)>;
using SignOperation = DeviceOperation<CtapGetAssertionRequest,
AuthenticatorGetAssertionResponse>;
using RegisterOperation =
DeviceOperation<CtapMakeCredentialRequest,
AuthenticatorMakeCredentialResponse>;
MakeCredentialTask(FidoDevice* device,
CtapMakeCredentialRequest request,
MakeCredentialTaskCallback callback);
~MakeCredentialTask() override;
// GetTouchRequest returns a request that will cause a device to flash and
// wait for a touch.
static CtapMakeCredentialRequest GetTouchRequest(const FidoDevice* device);
// FidoTask:
void Cancel() override;
private:
// FidoTask:
void StartTask() final;
void MakeCredential();
CtapGetAssertionRequest NextSilentRequest();
void HandleResponseToSilentSignRequest(
CtapDeviceResponseCode response_code,
base::Optional<AuthenticatorGetAssertionResponse> response_data);
void HandleResponseToDummyTouch(
CtapDeviceResponseCode response_code,
base::Optional<AuthenticatorMakeCredentialResponse> response_data);
void U2fRegister();
void MaybeRevertU2fFallback(
CtapDeviceResponseCode status,
base::Optional<AuthenticatorMakeCredentialResponse> response);
CtapMakeCredentialRequest request_;
std::vector<std::vector<PublicKeyCredentialDescriptor>> exclude_list_batches_;
size_t current_exclude_list_batch_ = 0;
std::unique_ptr<RegisterOperation> register_operation_;
std::unique_ptr<SignOperation> silent_sign_operation_;
MakeCredentialTaskCallback callback_;
// probing_alternative_rp_id_ is true if |app_id| is set in |request_| and
// thus the exclude list is being probed a second time with the alternative RP
// ID.
bool probing_alternative_rp_id_ = false;
bool canceled_ = false;
base::WeakPtrFactory<MakeCredentialTask> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(MakeCredentialTask);
};
// FilterAndBatchCredentialDescriptors splits a list of
// PublicKeyCredentialDescriptors such that each chunk is guaranteed to fit into
// an allowList parameter of a GetAssertion request for the given |device|.
//
// |device| must be a fully initialized CTAP2 device, i.e. its device_info()
// method must return an AuthenticatorGetInfoResponse.
//
// The result will never be empty. It will, at least, contain a single empty
// vector.
std::vector<std::vector<PublicKeyCredentialDescriptor>>
FilterAndBatchCredentialDescriptors(
const std::vector<PublicKeyCredentialDescriptor>& in,
const FidoDevice& device);
} // namespace device
#endif // DEVICE_FIDO_MAKE_CREDENTIAL_TASK_H_
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