Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_decode.py: 42%

1###### Coverage stub 

2import atexit 

3import coverage 

4cov = coverage.coverage(data_file='.coverage', cover_pylib=True) 

5cov.start() 

6# Register an exist handler that will print coverage 

7def exit_handler(): 

8 cov.stop() 

9 cov.save() 

10atexit.register(exit_handler) 

11####### End of coverage stub 

12#!/usr/bin/python3 

13# Copyright 2022 Google LLC 

14# 

15# Licensed under the Apache License, Version 2.0 (the "License"); 

16# you may not use this file except in compliance with the License. 

17# You may obtain a copy of the License at 

18# 

19# http://www.apache.org/licenses/LICENSE-2.0 

20# 

21# Unless required by applicable law or agreed to in writing, software 

22# distributed under the License is distributed on an "AS IS" BASIS, 

23# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

24# See the License for the specific language governing permissions and 

25# limitations under the License. 

26 

27import sys 

28import atheris 

29 

30import pyasn1 

31from pyasn1.codec.der import decoder as der_decoder 

32 

33from pyasn1_modules import pem 

34from pyasn1_modules import rfc5280 

35from pyasn1_modules import rfc3161 

36 

37pyasn1_module_list = [ 

38 rfc5280.AlgorithmIdentifier(), 

39 rfc3161.TimeStampReq() 

40] 

41 

42def TestOneInput(data): 

43 fdp = atheris.FuzzedDataProvider(data) 

44 

45 try: 

46 substrate = pem.readBase64fromText(fdp.ConsumeUnicodeNoSurrogates(sys.maxsize)) 

47 except: 

48 return # readBase64 is just a wrapper around base64 so we avoid issues 

49 

50 identifier = fdp.PickValueInList(pyasn1_module_list) 

51 try: 

52 der_decoder.decode(substrate, asnSpec=identifier) 

53 except pyasn1.error.PyAsn1Error: 

54 pass 

55 

56 

57def main(): 

58 atheris.instrument_all() 

59 atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True) 

60 atheris.Fuzz() 

61 

62 

63if __name__ == "__main__": 

64 main()