blob: dc83b75b5000db0cb67e24e889b540bfe4ee010e [file] [log] [blame]
// 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.
#include "device/fido/authenticator_get_assertion_response.h"
#include <utility>
#include "base/optional.h"
#include "device/fido/authenticator_data.h"
#include "device/fido/fido_parsing_utils.h"
namespace device {
namespace {
constexpr size_t kFlagIndex = 0;
constexpr size_t kFlagLength = 1;
constexpr size_t kCounterIndex = 1;
constexpr size_t kCounterLength = 4;
constexpr size_t kSignatureIndex = 5;
} // namespace
// static
base::Optional<AuthenticatorGetAssertionResponse>
AuthenticatorGetAssertionResponse::CreateFromU2fSignResponse(
const std::vector<uint8_t>& relying_party_id_hash,
const std::vector<uint8_t>& u2f_data,
const std::vector<uint8_t>& key_handle) {
if (key_handle.empty())
return base::nullopt;
auto flags = fido_parsing_utils::Extract(u2f_data, kFlagIndex, kFlagLength);
if (flags.empty())
return base::nullopt;
auto counter =
fido_parsing_utils::Extract(u2f_data, kCounterIndex, kCounterLength);
if (counter.empty())
return base::nullopt;
AuthenticatorData authenticator_data(relying_party_id_hash, flags[0],
std::move(counter), base::nullopt);
auto signature = fido_parsing_utils::Extract(
u2f_data, kSignatureIndex, u2f_data.size() - kSignatureIndex);
if (signature.empty())
return base::nullopt;
AuthenticatorGetAssertionResponse response(std::move(authenticator_data),
std::move(signature));
response.SetCredential(
PublicKeyCredentialDescriptor(CredentialType::kPublicKey, key_handle));
return std::move(response);
}
AuthenticatorGetAssertionResponse::AuthenticatorGetAssertionResponse(
AuthenticatorData authenticator_data,
std::vector<uint8_t> signature)
: authenticator_data_(std::move(authenticator_data)),
signature_(std::move(signature)) {}
AuthenticatorGetAssertionResponse::AuthenticatorGetAssertionResponse(
AuthenticatorGetAssertionResponse&& that) = default;
AuthenticatorGetAssertionResponse& AuthenticatorGetAssertionResponse::operator=(
AuthenticatorGetAssertionResponse&& other) = default;
AuthenticatorGetAssertionResponse::~AuthenticatorGetAssertionResponse() =
default;
const std::vector<uint8_t>& AuthenticatorGetAssertionResponse::GetRpIdHash()
const {
return authenticator_data_.application_parameter();
}
AuthenticatorGetAssertionResponse&
AuthenticatorGetAssertionResponse::SetCredential(
PublicKeyCredentialDescriptor credential) {
credential_ = std::move(credential);
raw_credential_id_ = credential_->id();
return *this;
}
AuthenticatorGetAssertionResponse&
AuthenticatorGetAssertionResponse::SetUserEntity(
PublicKeyCredentialUserEntity user_entity) {
user_entity_ = std::move(user_entity);
return *this;
}
AuthenticatorGetAssertionResponse&
AuthenticatorGetAssertionResponse::SetNumCredentials(uint8_t num_credentials) {
num_credentials_ = num_credentials;
return *this;
}
} // namespace device