mirror of https://github.com/google/oss-fuzz.git
85 lines
2.6 KiB
Python
85 lines
2.6 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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from pyparsing import (
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Literal,
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Word,
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ZeroOrMore,
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Group,
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Dict,
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Suppress,
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ParseException,
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)
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def dict_parse_generator(fdp):
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"""Generate random parser"""
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curr = Literal("f")
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special_chars="[]{}/|\<>:;-="
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op_count = fdp.ConsumeIntInRange(2, 15)
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for i in range(op_count):
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operation = fdp.ConsumeIntInRange(0,4)
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if operation == 0:
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l1 = Literal(fdp.PickValueInList(list(special_chars)))
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l2 = Literal(fdp.PickValueInList(list(special_chars)))
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word = Word(fdp.ConsumeUnicodeNoSurrogates(10))
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curr = Group(Dict(ZeroOrMore(word)) + curr)
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elif operation == 1:
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word1 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
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word2 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
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curr = Group(Dict(OneOrMore(word1, word2)) + curr)
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elif operation == 2:
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curr = curr + Word(fdp.ConsumeUnicodeNoSurrogates(10))
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elif operation == 3:
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curr = curr + Suppress(fdp.ConsumeUnicodeNoSurrogates(2))
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else:
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word1 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
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word2 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
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curr = Group(Dict(OneOrMore(word1, word2)) + curr)
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return Dict(curr)
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def TestOneInput(data):
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fdp = atheris.FuzzedDataProvider(data)
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try:
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bnf = dict_parse_generator(fdp)
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except:
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return
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try:
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tokens = bnf.parseString(fdp.ConsumeUnicodeNoSurrogates(1024))
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except ParseException:
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pass
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except TypeError as e:
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# Catch the TypeError exception from here:
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# https://github.com/pyparsing/pyparsing/blob/d93930308f7fe79f2290812074f62a472c83db59/pyparsing/core.py#L5674
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if "could not extract dict values from parsed results" 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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