oss-fuzz/projects/protobuf-python/fuzz_protobuf.py

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#!/usr/bin/python3
# Copyright 2022 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.
import os
import sys
import atheris
with atheris.instrument_imports():
import test_full_pb2
from google.protobuf.message import DecodeError
@atheris.instrument_func
def TestOneInput(input_bytes):
# We need to make the file an absolute path
testfile_path = os.path.join(os.getcwd(), "serialized.bin")
with open(testfile_path, "wb") as f:
f.write(input_bytes)
pbmsg = test_full_pb2.TestMessSubMess()
with open(testfile_path, "rb") as fd:
try:
pbmsg.ParseFromString(fd.read())
except DecodeError:
None
os.remove(testfile_path)
def main():
atheris.instrument_all()
atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
atheris.Fuzz()
if __name__ == "__main__":
main()