mirror of https://github.com/google/oss-fuzz.git
49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
#!/usr/bin/python3
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# Copyright 2022 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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import sys
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import atheris
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with atheris.instrument_imports():
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.asymmetric import dsa, utils
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def TestInput(input_bytes):
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fdp = atheris.FuzzedDataProvider(input_bytes)
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private_key = dsa.generate_private_key(key_size=1024)
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public_key = private_key.public_key()
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data = fdp.ConsumeBytes(20)
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more_data = fdp.ConsumeBytes(20)
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hasher = hashes.Hash(hashes.SHA256())
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hasher.update(data)
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hasher.update(more_data)
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digest = hasher.finalize()
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sig1 = private_key.sign(data,hashes.SHA256())
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sig2 = private_key.sign(digest,utils.Prehashed(hashes.SHA256()))
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public_key.verify(sig1,data,hashes.SHA256())
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public_key.verify(sig2,digest,utils.Prehashed(hashes.SHA256()))
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def main():
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atheris.Setup(sys.argv, TestInput, enable_python_coverage=False)
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atheris.instrument_all()
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atheris.Fuzz()
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if __name__ == "__main__":
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main()
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