# Copyright 2019 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
#
#      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.

from "tink/python/util/clif.h" import *  # StatusOr

from "tink/cc/aead.h":
  namespace `crypto::tink`:
    # The interface for authenticated encryption with associated data.
    # Implementations of this interface are secure against adaptive
    # chosen ciphertext attacks.  Encryption with associated data ensures
    # authenticity and integrity of that data, but not its secrecy.
    # (see RFC 5116, https://tools.ietf.org/html/rfc5116)
    class Aead:
      # Encrypts 'plaintext' with 'associated_data' as associated data,
      # and returns the resulting ciphertext.
      # The ciphertext allows for checking authenticity and integrity
      # of the associated data , but does not guarantee its secrecy.
      def `Encrypt` as encrypt(self, plaintext: bytes, associated_data: bytes)
        -> StatusOr<bytes>
      # 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.
      def `Decrypt` as decrypt(self, ciphertext: bytes, associated_data: bytes)
        -> StatusOr<bytes>