fuzz_glom.py

#!/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():
  from glom import glom
  import glom.core as glom_core
  import json


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

  val = {'d': {'e': ['f']}}
  try:
    glom(val, fdp.ConsumeString(30))
  except glom_core.PathAccessError:
    pass

  # Create a random dictionary. In this case if any
  # error happens during random dict creation we just
  # exit.
  try:
    data = json.loads(fdp.ConsumeString(100))
  except Exception:
    return
  if type(data) == dict:
    return

  # Use random dict as input to glom
  try:
    glom(data, fdp.ConsumeString(30))
  except glom_core.PathAccessError:
    pass


def main():
  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
  atheris.Fuzz()


if __name__ == "__main__":
  main()