Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/cryptography/hazmat/primitives/asymmetric/ed448.py: 62%

1# This file is dual licensed under the terms of the Apache License, Version 

2# 2.0, and the BSD License. See the LICENSE file in the root of this repository 

3# for complete details. 

4 

5 

6import abc 

7 

8from cryptography.exceptions import UnsupportedAlgorithm, _Reasons 

9from cryptography.hazmat.primitives import _serialization 

10 

11 

12class Ed448PublicKey(metaclass=abc.ABCMeta): 

13 @classmethod 

14 def from_public_bytes(cls, data: bytes) -> "Ed448PublicKey": 

15 from cryptography.hazmat.backends.openssl.backend import backend 

16 

17 if not backend.ed448_supported(): 

18 raise UnsupportedAlgorithm( 

19 "ed448 is not supported by this version of OpenSSL.", 

20 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

21 ) 

22 

23 return backend.ed448_load_public_bytes(data) 

24 

25 @abc.abstractmethod 

26 def public_bytes( 

27 self, 

28 encoding: _serialization.Encoding, 

29 format: _serialization.PublicFormat, 

30 ) -> bytes: 

31 """ 

32 The serialized bytes of the public key. 

33 """ 

34 

35 def public_bytes_raw(self) -> bytes: 

36 """ 

37 The raw bytes of the public key. 

38 Equivalent to public_bytes(Raw, Raw). 

39 """ 

40 return self.public_bytes( 

41 _serialization.Encoding.Raw, _serialization.PublicFormat.Raw 

42 ) 

43 

44 @abc.abstractmethod 

45 def verify(self, signature: bytes, data: bytes) -> None: 

46 """ 

47 Verify the signature. 

48 """ 

49 

50 

51class Ed448PrivateKey(metaclass=abc.ABCMeta): 

52 @classmethod 

53 def generate(cls) -> "Ed448PrivateKey": 

54 from cryptography.hazmat.backends.openssl.backend import backend 

55 

56 if not backend.ed448_supported(): 

57 raise UnsupportedAlgorithm( 

58 "ed448 is not supported by this version of OpenSSL.", 

59 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

60 ) 

61 return backend.ed448_generate_key() 

62 

63 @classmethod 

64 def from_private_bytes(cls, data: bytes) -> "Ed448PrivateKey": 

65 from cryptography.hazmat.backends.openssl.backend import backend 

66 

67 if not backend.ed448_supported(): 

68 raise UnsupportedAlgorithm( 

69 "ed448 is not supported by this version of OpenSSL.", 

70 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

71 ) 

72 

73 return backend.ed448_load_private_bytes(data) 

74 

75 @abc.abstractmethod 

76 def public_key(self) -> Ed448PublicKey: 

77 """ 

78 The Ed448PublicKey derived from the private key. 

79 """ 

80 

81 @abc.abstractmethod 

82 def sign(self, data: bytes) -> bytes: 

83 """ 

84 Signs the data. 

85 """ 

86 

87 @abc.abstractmethod 

88 def private_bytes( 

89 self, 

90 encoding: _serialization.Encoding, 

91 format: _serialization.PrivateFormat, 

92 encryption_algorithm: _serialization.KeySerializationEncryption, 

93 ) -> bytes: 

94 """ 

95 The serialized bytes of the private key. 

96 """ 

97 

98 def private_bytes_raw(self) -> bytes: 

99 """ 

100 The raw bytes of the private key. 

101 Equivalent to private_bytes(Raw, Raw, NoEncryption()). 

102 """ 

103 return self.private_bytes( 

104 _serialization.Encoding.Raw, 

105 _serialization.PrivateFormat.Raw, 

106 _serialization.NoEncryption(), 

107 )