Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_keys.py: 56%

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 

32from ecdsa.keys import VerifyingKey 

33 

34 

35def target1(fdp): 

36 try: 

37 VerifyingKey.from_der(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024))) 

38 except ecdsa.der.UnexpectedDER: 

39 pass 

40 

41 

42def target2(fdp): 

43 try: 

44 VerifyingKey.from_pem(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)), hashlib.sha256) 

45 except ecdsa.der.UnexpectedDER: 

46 pass 

47 except binascii.Error: 

48 pass 

49 

50 

51def target3(fdp): 

52 try: 

53 VerifyingKey.from_public_key_recovery_with_digest( 

54 fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)), fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)), 

55 ecdsa.curves.Ed25519) 

56 except ecdsa.der.UnexpectedDER: 

57 pass 

58 except ValueError: 

59 pass 

60 

61 

62def target4(fdp): 

63 try: 

64 VerifyingKey.from_string(fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(0, 1024)), 

65 ecdsa.curves.Ed25519) 

66 except ecdsa.keys.MalformedPointError: 

67 pass 

68 except ecdsa.der.UnexpectedDER: 

69 pass 

70 except ValueError: 

71 pass 

72 

73 

74def target5(fdp): 

75 vk_str = fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(0, 1024)) 

76 sig = fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)) 

77 data = fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)) 

78 try: 

79 vk = VerifyingKey.from_pem(vk_str) 

80 vk.verify(sig, data) 

81 except ecdsa.keys.MalformedPointError: 

82 pass 

83 except ecdsa.der.UnexpectedDER: 

84 pass 

85 except ValueError: 

86 pass 

87 

88 

89def TestOneInput(data): 

90 fdp = atheris.FuzzedDataProvider(data) 

91 targets = [ 

92 target1, 

93 target2, 

94 target3, 

95 target4, 

96 target5, 

97 ] 

98 

99 target = fdp.PickValueInList(targets) 

100 target(fdp) 

101 

102 

103def main(): 

104 atheris.instrument_all() 

105 atheris.Setup(sys.argv, TestOneInput) 

106 atheris.Fuzz() 

107 

108 

109if __name__ == "__main__": 

110 main()