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#!/usr/bin/python3
# Copyright 2020 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
with atheris.instrument_imports():
import logging
import warnings
from bs4 import BeautifulSoup
try:
import HTMLParser
HTMLParseError = HTMLParser.HTMLParseError
except ImportError:
# HTMLParseError is removed in Python 3.5. Since it can never be
# thrown in 3.5, we can just define our own class as a placeholder.
class HTMLParseError(Exception):
pass
@atheris.instrument_func
def TestOneInput(data):
"""TestOneInput gets random data from the fuzzer, and throws it at bs4."""
if len(data) < 1:
return
parsers = ['lxml-xml', 'html5lib', 'html.parser', 'lxml']
try:
idx = int(data[0]) % len(parsers)
except ValueError:
return
try:
soup = BeautifulSoup(data[1:], features=parsers[idx])
except HTMLParseError:
return
except ValueError:
return
list(soup.find_all(True))
soup.prettify()
def main():
logging.disable(logging.CRITICAL)
warnings.filterwarnings('ignore')
atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
atheris.Fuzz()
if __name__ == "__main__":
main()
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