google-py-crc32c: initial integration (#7742)

projects/google-py-crc32c/Dockerfile

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+# 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.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN git clone https://github.com/googleapis/python-crc32c
+COPY build.sh *.py $SRC/
+WORKDIR python-crc32c

projects/google-py-crc32c/build.sh

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+#!/bin/bash -eu
+# 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.
+#
+################################################################################
+
+git submodule update --init --recursive
+
+mkdir usr
+export CRC32C_INSTALL_PREFIX=$(pwd)/usr
+
+mkdir google_crc32c/build
+cd google_crc32c/build
+cmake \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCRC32C_BUILD_TESTS=no \
+  -DCRC32C_BUILD_BENCHMARKS=no \
+  -DBUILD_SHARED_LIBS=yes \
+  -DCMAKE_INSTALL_PREFIX:PATH=${CRC32C_INSTALL_PREFIX} \
+  ../
+make all install
+cd ../../
+
+
+python3 setup.py build_ext \
+  --include-dirs=$(pwd)/usr/include \
+  --library-dirs=$(pwd)/usr/lib \
+  --rpath=$(pwd)/usr/lib
+pip3 install -e .[testing]
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/google-py-crc32c/fuzz_checksum.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 atheris
+import sys
+
+with atheris.instrument_imports():
+  import google_crc32c
+
+def TestOneInput(data):
+  val1 = google_crc32c.value(data)
+  val2 = google_crc32c.Checksum(data)._crc
+  assert val1 == val2
+
+
+def main():
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()

projects/google-py-crc32c/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/googleapis/python-crc32c
+language: python
+main_repo: https://github.com/googleapis/python-crc32c
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com
+- adam@adalogics.com