codekingpro/portable-devtools

1# Copyright 2017 Google LLC2#3# Licensed under the Apache License, Version 2.0 (the "License");4# you may not use this file except in compliance with the License.5# You may obtain a copy of the License at6#7#      http://www.apache.org/licenses/LICENSE-2.08#9# Unless required by applicable law or agreed to in writing, software10# distributed under the License is distributed on an "AS IS" BASIS,11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12# See the License for the specific language governing permissions and13# limitations under the License.14 15"""RSA cryptography signer and verifier."""16 17 18try:19    # Prefer cryptograph-based RSA implementation.20    from google.auth.crypt import _cryptography_rsa21 22    RSASigner = _cryptography_rsa.RSASigner23    RSAVerifier = _cryptography_rsa.RSAVerifier24except ImportError:  # pragma: NO COVER25    # Fallback to pure-python RSA implementation if cryptography is26    # unavailable.27    from google.auth.crypt import _python_rsa28 29    RSASigner = _python_rsa.RSASigner  # type: ignore30    RSAVerifier = _python_rsa.RSAVerifier  # type: ignore31