// 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.

#ifndef DEVICE_FIDO_CTAP_GET_ASSERTION_REQUEST_H_
#define DEVICE_FIDO_CTAP_GET_ASSERTION_REQUEST_H_

#include <stdint.h>

#include <array>
#include <string>
#include <vector>

#include "base/component_export.h"
#include "base/containers/span.h"
#include "base/macros.h"
#include "base/optional.h"
#include "crypto/sha2.h"
#include "device/fido/cable/cable_discovery_data.h"
#include "device/fido/fido_constants.h"
#include "device/fido/public_key_credential_descriptor.h"

namespace cbor {
class Value;
}

namespace device {

// Object that encapsulates request parameters for AuthenticatorGetAssertion as
// specified in the CTAP spec.
// https://fidoalliance.org/specs/fido-v2.0-rd-20161004/fido-client-to-authenticator-protocol-v2.0-rd-20161004.html#authenticatorgetassertion
struct COMPONENT_EXPORT(DEVICE_FIDO) CtapGetAssertionRequest {
 public:
  using ClientDataHash = std::array<uint8_t, kClientDataHashLength>;

  CtapGetAssertionRequest(std::string rp_id, std::string client_data_json);
  CtapGetAssertionRequest(const CtapGetAssertionRequest& that);
  CtapGetAssertionRequest(CtapGetAssertionRequest&& that);
  CtapGetAssertionRequest& operator=(const CtapGetAssertionRequest& other);
  CtapGetAssertionRequest& operator=(CtapGetAssertionRequest&& other);
  ~CtapGetAssertionRequest();

  // Serializes GetAssertion request parameter into CBOR encoded map with
  // integer keys and CBOR encoded values as defined by the CTAP spec.
  // https://drafts.fidoalliance.org/fido-2/latest/fido-client-to-authenticator-protocol-v2.0-wd-20180305.html#authenticatorGetAssertion
  static std::pair<CtapRequestCommand, base::Optional<cbor::Value>>
  EncodeAsCBOR(const CtapGetAssertionRequest& request);

  std::string rp_id;
  std::string client_data_json;
  std::array<uint8_t, kClientDataHashLength> client_data_hash;
  UserVerificationRequirement user_verification =
      UserVerificationRequirement::kDiscouraged;
  bool user_presence_required = true;

  std::vector<PublicKeyCredentialDescriptor> allow_list;
  base::Optional<std::vector<uint8_t>> pin_auth;
  base::Optional<uint8_t> pin_protocol;
  base::Optional<std::vector<CableDiscoveryData>> cable_extension;
  base::Optional<std::string> app_id;
  base::Optional<std::array<uint8_t, crypto::kSHA256Length>>
      alternative_application_parameter;

  bool is_incognito_mode = false;
};

struct CtapGetNextAssertionRequest {
 public:
  static std::pair<CtapRequestCommand, base::Optional<cbor::Value>>
  EncodeAsCBOR(const CtapGetNextAssertionRequest&);
};

}  // namespace device

#endif  // DEVICE_FIDO_CTAP_GET_ASSERTION_REQUEST_H_