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# 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.
"""Interface for PublicKeyVerify."""
from __future__ import absolute_import
from __future__ import division
from __future__ import google_type_annotations
from __future__ import print_function
import abc
class PublicKeyVerify(object):
"""Interface for public key verifying.
Digital Signatures provide functionality of signing data and verification of
the signatures. They are represented by a pair of primitives (interfaces)
'PublicKeySign' for signing of data, and 'PublicKeyVerify' for verification
of signatures. Implementations of these interfaces are secure against
adaptive chosen-message attacks. Signing data ensures the authenticity and
the integrity of that data, but not its secrecy.
"""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def verify(self, signature: bytes, data: bytes) -> bytes:
"""Verifies that signature is a digital signature for data.
Args:
signature: The signature bytes to be checked.
data: The data bytes to be checked.
Raises:
