Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_keys.py: 62%

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 

33from ecdsa import SigningKey 

34 

35 

36def target1(fdp): 

37 try: 

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

39 except ecdsa.der.UnexpectedDER: 

40 pass 

41 

42 

43def target2(fdp): 

44 try: 

45 VerifyingKey.from_pem(fdp.ConsumeBytes( 

46 fdp.ConsumeIntInRange(0, 1024)), hashlib.sha256) 

47 except ecdsa.der.UnexpectedDER: 

48 pass 

49 except binascii.Error: 

50 pass 

51 

52 

53def target3(fdp): 

54 try: 

55 VerifyingKey.from_public_key_recovery_with_digest( 

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

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

58 ecdsa.curves.Ed25519) 

59 except ecdsa.der.UnexpectedDER: 

60 pass 

61 except ValueError: 

62 pass 

63 

64 

65def target4(fdp): 

66 try: 

67 VerifyingKey.from_string(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)), 

68 ecdsa.curves.Ed25519) 

69 except ecdsa.keys.MalformedPointError: 

70 pass 

71 except ecdsa.der.UnexpectedDER: 

72 pass 

73 except ValueError: 

74 pass 

75 

76 

77def target5(fdp): 

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

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

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

81 try: 

82 vk = VerifyingKey.from_pem(vk_str) 

83 vk.verify(sig, data) 

84 except ecdsa.keys.MalformedPointError: 

85 pass 

86 except ecdsa.der.UnexpectedDER: 

87 pass 

88 except ValueError: 

89 pass 

90 

91 

92def target6(fdp): 

93 sk = SigningKey.generate() 

94 vk = sk.verifying_key 

95 message = fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)) 

96 signature = sk.sign(message) 

97 assert vk.verify(signature, message) 

98 

99 

100def target7(fdp): 

101 try: 

102 SigningKey.from_string(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024)), 

103 curve=ecdsa.curves.NIST384p) 

104 except ecdsa.keys.MalformedPointError: 

105 pass 

106 

107 

108def target8(fdp): 

109 try: 

110 SigningKey.from_pem(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024))) 

111 except ecdsa.der.UnexpectedDER: 

112 pass 

113 except ValueError: 

114 pass 

115 

116 

117def target9(fdp): 

118 try: 

119 SigningKey.from_der(fdp.ConsumeBytes(fdp.ConsumeIntInRange(0, 1024))) 

120 except ecdsa.der.UnexpectedDER: 

121 pass 

122 

123 

124def TestOneInput(data): 

125 fdp = atheris.FuzzedDataProvider(data) 

126 targets = [ 

127 target1, 

128 target2, 

129 target3, 

130 target4, 

131 target5, 

132 target6, 

133 target7, 

134 target8, 

135 target9 

136 ] 

137 

138 target = fdp.PickValueInList(targets) 

139 target(fdp) 

140 

141 

142def main(): 

143 atheris.instrument_all() 

144 atheris.Setup(sys.argv, TestOneInput) 

145 atheris.Fuzz() 

146 

147 

148if __name__ == "__main__": 

149 main()