cpp/build-support/fuzzing/pack_corpus.py

#!/usr/bin/env python3
#
# Licensed to the Apache Software Foundation (ASF) under one
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# regarding copyright ownership.  The ASF licenses this file
# to you 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
#
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

# Rename a bunch of corpus files to their SHA1 hashes, and
# pack them into a ZIP archive.

import hashlib
from pathlib import Path
import sys
import zipfile


def process_dir(corpus_dir, zip_output):
    seen_hashes = {}

    for child in sorted(corpus_dir.iterdir()):
        if not child.is_file():
            raise IOError(f"Not a file: {child}")
        with child.open('rb') as f:
            data = f.read()
        arcname = hashlib.sha1(data).hexdigest()
        if arcname in seen_hashes:
            raise ValueError(
                f"Duplicate hash: {arcname} (in file {child}), "
                f"already seen in file {seen_hashes[arcname]}")
        print(f"  {child} -> {arcname}")
        zip_output.writestr(str(arcname), data)
        seen_hashes[arcname] = child


def main(corpus_dir, zip_output_name):
    with zipfile.ZipFile(zip_output_name, 'w') as zip_output:
        process_dir(Path(corpus_dir), zip_output)


if __name__ == "__main__":
    if len(sys.argv) != 3:
        print(f"Usage: {sys.argv[0]} <corpus dir> <output zip file>")
        sys.exit(1)
    main(sys.argv[1], sys.argv[2])