mirror of https://github.com/google/oss-fuzz.git
124 lines
3.4 KiB
Python
124 lines
3.4 KiB
Python
#!/usr/bin/python3
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# Copyright 2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import sys
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import atheris
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import six
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from six.moves import http_client
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import mock
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import httplib2
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import google_auth_httplib2
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# Mocks for fuzzing. Inspired by testing infra. Main difference is we have
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# added logic to handle the event where the MockHTTP has run out of
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# responses an appropriate exception is thrown that we catch in the fuzzer.
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class FuzzMockHttp(object):
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def __init__(self, responses, headers=None):
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self.responses = responses
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self.requests = []
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self.headers = headers or {}
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self.add_certificate = mock.Mock(return_value=None)
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def request(
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self,
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url,
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method="GET",
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body=None,
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headers=None,
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redirections=httplib2.DEFAULT_MAX_REDIRECTS,
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connection_type=None,
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):
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self.requests.append(
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(method, url, body, headers, redirections, connection_type)
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)
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if len(self.responses) == 0:
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raise Exception("FUZZ: No more responses")
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return self.responses.pop(0)
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class FuzzMockResponse(object):
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def __init__(self, status=http_client.OK, data=b""):
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self.status = status
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self.data = data
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def __iter__(self):
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yield self
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yield self.data
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class FuzzMockCredentials(object):
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def __init__(self, token="token"):
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self.token = token
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def apply(self, headers):
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headers["authorization"] = self.token
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def before_request(self, request, method, url, headers):
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self.apply(headers)
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def refresh(self, request):
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self.token += "1"
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def TestOneInput(data):
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fdp = atheris.FuzzedDataProvider(data)
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mock_credentials = mock.Mock(wraps=FuzzMockCredentials(fdp.ConsumeUnicodeNoSurrogates(10)))
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if fdp.ConsumeBool() == True:
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mock_credentials.apply({'authorization': ""})
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# Create responses. We need at least two.
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http_codes = [400, 401, 403, 404, 405, 413, 415, 429, 500, 503, 504]
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mock_responses = []
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for i in range(fdp.ConsumeIntInRange(1, 10)):
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mock_responses.append(
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FuzzMockResponse(
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status = http_codes[fdp.ConsumeIntInRange(0, len(http_codes)-1)],
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data = fdp.ConsumeBytes(100)
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)
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)
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mock_http = FuzzMockHttp(mock_responses)
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authed_http = google_auth_httplib2.AuthorizedHttp(
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mock_credentials, http=mock_http
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)
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try:
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r, d = authed_http.request(
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"http://localhost:8001",
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fdp.ConsumeUnicodeNoSurrogates(10),
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None,
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None,
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httplib2.DEFAULT_MAX_REDIRECTS,
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None
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)
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except Exception as e:
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if "FUZZ" in str(e):
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pass
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else:
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raise e
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def main():
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atheris.instrument_all()
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atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
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atheris.Fuzz()
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if __name__ == "__main__":
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main()
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