oss-fuzz/projects/httpx/fuzz_decoders.py

#!/usr/bin/python3
# Copyright 2023 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 sys
import atheris
import httpx
from httpx._decoders import ByteChunker, LineDecoder, TextChunker, TextDecoder


def TestOneInput(data):
  fdp = atheris.FuzzedDataProvider(data)

  ByteChunker(chunk_size=fdp.ConsumeIntInRange(1, 100)).decode(
    fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024))
  )
  LineDecoder().decode(fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(0, 1024)))
  TextChunker(chunk_size=fdp.ConsumeIntInRange(1, 100)).decode(
    fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(0, 1024))
  )
  TextDecoder().decode(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)))


def main():
  atheris.instrument_all()
  atheris.Setup(sys.argv, TestOneInput)
  atheris.Fuzz()


if __name__ == "__main__":
  main()