Merge remote-tracking branch 'origin/upstream-main'

Change-Id: I180a85b5132d9a086533ca7824c6bf92173b195c

1 files changed, 124 insertions, 0 deletions

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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_