cc/python/mac.clif

# 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 *  # Status, StatusOr
from clif.python.postproc import DropOkStatus

from "tink/cc/mac.h":
  namespace `crypto::tink`:
    # Interface for MACs (Message Authentication Codes).
    # This interface should be used for authentication only, and not for other
    # purposes (e.g., it should not be used to generate pseudorandom bytes).
    class Mac:
      # Computes and returns the message authentication code (MAC) for 'data'.
      def `ComputeMac` as compute_mac(self, data: bytes) -> StatusOr<bytes>
      # Verifies if 'mac' is a correct authentication code (MAC) for 'data'.
      # Raises a StatusNotOk exception if the verification fails.
      def `VerifyMac` as verify_mac(self, mac: bytes, data: bytes)
          -> (ok: Status):
        return DropOkStatus(...)