Renaming C++ Daead-interface to DeterministicAead (for compatibility with Java).

PiperOrigin-RevId: 215708241
GitOrigin-RevId: b596f3df1821ab588e144bbd47790cda3fcf082a

1 files changed, 61 insertions, 0 deletions

diff --git a/cc/deterministic_aead.h b/cc/deterministic_aead.h
new file mode 100644
index 000000000..73027b6fb
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+++ b/cc/deterministic_aead.h
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+// Copyright 2017 Google Inc.
+//
+// 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
+//
+//     http://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 TINK_DETERMINISTIC_AEAD_H_
+#define TINK_DETERMINISTIC_AEAD_H_
+
+#include "absl/strings/string_view.h"
+#include "tink/util/statusor.h"
+
+namespace crypto {
+namespace tink {
+
+///////////////////////////////////////////////////////////////////////////////
+// The interface for deterministic authenticated encryption with associated
+// data.
+// TODO(bleichen): Copy the interface from Java.
+//   Check the properties:
+//   - authenticated
+//   - secure in multi-user setting
+//   - thread safe/copy safe
+// References:
+// https://eprint.iacr.org/2016/1124.pdf
+class DeterministicAead {
+ public:
+  // Encrypts 'plaintext' with 'associated_data' as associated data
+  // deterministically, and returns the resulting ciphertext.
+  // The ciphertext allows for checking authenticity and integrity
+  // of the associated data, but does not guarantee its secrecy.
+  virtual crypto::tink::util::StatusOr<std::string> EncryptDeterministically(
+      absl::string_view plaintext,
+      absl::string_view associated_data) const = 0;
+
+  // Decrypts 'ciphertext' with 'associated_data' as associated data,
+  // and returns the resulting plaintext.
+  // The decryption verifies the authenticity and integrity
+  // of the associated data, but there are no guarantees wrt. secrecy
+  // of that data.
+  virtual crypto::tink::util::StatusOr<std::string> DecryptDeterministically(
+      absl::string_view ciphertext,
+      absl::string_view associated_data) const = 0;
+
+  virtual ~DeterministicAead() {}
+};
+
+}  // namespace tink
+}  // namespace crypto
+
+#endif  // TINK_DETERMINISTIC_AEAD_H_