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/*
* Copyright 2023 Google LLC.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_FAKE_ACT_H_
#define PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_FAKE_ACT_H_
#include <memory>
#include <string>
#include <tuple>
#include <vector>
#include "act/act.h"
#include "act/act.pb.h"
#include "private_join_and_compute/util/status.inc"
namespace private_join_and_compute {
namespace anonymous_counting_tokens {
// A fake, insecure implementation of Anonymous Counting Tokens for
// testing/stubbing purposes only. This should NOT be used in production: it
// doesn't have any of the desired security properties.
class FakeAnonymousCountingTokens : public AnonymousCountingTokens {
public:
static const size_t kFakeTokenNonceLengthBits = 256;
// Returns an instance of FakeAnonymousCountingTokens.
static std::unique_ptr<AnonymousCountingTokens> Create();
~FakeAnonymousCountingTokens() override = default;
// Returns empty Server parameters.
StatusOr<ServerParameters> GenerateServerParameters(
const SchemeParameters& scheme_parameters) override;
// Returns empty Client parameters.
StatusOr<ClientParameters> GenerateClientParameters(
const SchemeParameters& scheme_parameters,
const ServerPublicParameters& server_public_parameters) override;
// Always returns "Ok".
Status CheckClientParameters(
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ServerPublicParameters& server_public_parameters,
const ServerPrivateParameters& server_private_parameters) override;
// For this fake implementation, the client fingerprints are the same as the
// messages (this is insecure).
StatusOr<std::tuple<std::vector<std::string>, TokensRequest,
TokensRequestPrivateState>>
GenerateTokensRequest(
absl::Span<const std::string> messages,
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ClientPrivateParameters& client_private_parameters,
const ServerPublicParameters& server_public_parameters) override;
// Always returns "Ok".
Status CheckTokensRequest(
absl::Span<const std::string> client_fingerprints,
const TokensRequest& tokens_request,
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ServerPublicParameters& server_public_parameters,
const ServerPrivateParameters& server_private_parameters) override;
// Returns an empty TokensResponse.
StatusOr<TokensResponse> GenerateTokensResponse(
const TokensRequest& tokens_request,
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ServerPublicParameters& server_public_parameters,
const ServerPrivateParameters& server_private_parameters) override;
// Always returns "Ok".
Status VerifyTokensResponse(
absl::Span<const std::string> messages,
const TokensRequest& tokens_request,
const TokensRequestPrivateState& tokens_request_private_state,
const TokensResponse& tokens_response,
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ClientPrivateParameters& client_private_parameters,
const ServerPublicParameters& server_public_parameters) override;
// Returns a set of tokens containing randomly generated "nonce" values, and
// all other fields empty.
StatusOr<std::vector<Token>> RecoverTokens(
absl::Span<const std::string> messages,
const TokensRequest& tokens_request,
const TokensRequestPrivateState& tokens_request_private_state,
const TokensResponse& tokens_response,
const SchemeParameters& scheme_parameters,
const ClientPublicParameters& client_public_parameters,
const ClientPrivateParameters& client_private_parameters,
const ServerPublicParameters& server_public_parameters) override;
// Always returns "Ok".
Status VerifyToken(
std::string m, const Token& token,
const SchemeParameters& scheme_parameters,
const ServerPublicParameters& server_public_parameters,
const ServerPrivateParameters& server_private_parameters) override;
protected:
FakeAnonymousCountingTokens() = default;
};
} // namespace anonymous_counting_tokens
} // namespace private_join_and_compute
#endif // PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_FAKE_ACT_H_
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