30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
# Copyright 2017 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""RSA cryptography signer and verifier."""
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try:
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# Prefer cryptograph-based RSA implementation.
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from google.auth.crypt import _cryptography_rsa
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RSASigner = _cryptography_rsa.RSASigner
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RSAVerifier = _cryptography_rsa.RSAVerifier
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except ImportError: # pragma: NO COVER
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# Fallback to pure-python RSA implementation if cryptography is
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# unavailable.
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from google.auth.crypt import _python_rsa
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RSASigner = _python_rsa.RSASigner
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RSAVerifier = _python_rsa.RSAVerifier
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