Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_eddsa.py: 47%

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 2023 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. 

26import sys 

27import atheris 

28import hashlib 

29import binascii 

30 

31import ecdsa 

32 

33 

34def target1(fdp): 

35 a = ecdsa.ellipticcurve.PointEdwards(ecdsa.eddsa.curve_ed25519, 

36 fdp.ConsumeIntInRange(0, 10), 

37 fdp.ConsumeIntInRange(0, 10), 

38 fdp.ConsumeIntInRange(0, 10), 

39 fdp.ConsumeIntInRange(0, 10)) 

40 z = a.double() 

41 

42 

43def target2(fdp): 

44 try: 

45 key = ecdsa.eddsa.PublicKey(ecdsa.eddsa.generator_ed25519, 

46 fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 512))) 

47 key.verify(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 512)), fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 512))) 

48 except ValueError: 

49 pass 

50 except ecdsa.errors.MalformedPointError: 

51 pass 

52 

53 

54def TestOneInput(data): 

55 fdp = atheris.FuzzedDataProvider(data) 

56 targets = [ 

57 target1, 

58 target2, 

59 ] 

60 target = fdp.PickValueInList(targets) 

61 target(fdp) 

62 

63 

64def main(): 

65 atheris.instrument_all() 

66 atheris.Setup(sys.argv, TestOneInput) 

67 atheris.Fuzz() 

68 

69 

70if __name__ == "__main__": 

71 main()