Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/cryptography/hazmat/primitives/asymmetric/ed448.py: 73%

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 

5from __future__ import annotations 

6 

7import abc 

8 

9from cryptography.exceptions import UnsupportedAlgorithm, _Reasons 

10from cryptography.hazmat.bindings._rust import openssl as rust_openssl 

11from cryptography.hazmat.primitives import _serialization 

12 

13 

14class Ed448PublicKey(metaclass=abc.ABCMeta): 

15 @classmethod 

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

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

18 

19 if not backend.ed448_supported(): 

20 raise UnsupportedAlgorithm( 

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

22 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

23 ) 

24 

25 return rust_openssl.ed448.from_public_bytes(data) 

26 

27 @abc.abstractmethod 

28 def public_bytes( 

29 self, 

30 encoding: _serialization.Encoding, 

31 format: _serialization.PublicFormat, 

32 ) -> bytes: 

33 """ 

34 The serialized bytes of the public key. 

35 """ 

36 

37 @abc.abstractmethod 

38 def public_bytes_raw(self) -> bytes: 

39 """ 

40 The raw bytes of the public key. 

41 Equivalent to public_bytes(Raw, Raw). 

42 """ 

43 

44 @abc.abstractmethod 

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

46 """ 

47 Verify the signature. 

48 """ 

49 

50 @abc.abstractmethod 

51 def __eq__(self, other: object) -> bool: 

52 """ 

53 Checks equality. 

54 """ 

55 

56 

57if hasattr(rust_openssl, "ed448"): 

58 Ed448PublicKey.register(rust_openssl.ed448.Ed448PublicKey) 

59 

60 

61class Ed448PrivateKey(metaclass=abc.ABCMeta): 

62 @classmethod 

63 def generate(cls) -> Ed448PrivateKey: 

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

65 

66 if not backend.ed448_supported(): 

67 raise UnsupportedAlgorithm( 

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

69 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

70 ) 

71 

72 return rust_openssl.ed448.generate_key() 

73 

74 @classmethod 

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

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

77 

78 if not backend.ed448_supported(): 

79 raise UnsupportedAlgorithm( 

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

81 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

82 ) 

83 

84 return rust_openssl.ed448.from_private_bytes(data) 

85 

86 @abc.abstractmethod 

87 def public_key(self) -> Ed448PublicKey: 

88 """ 

89 The Ed448PublicKey derived from the private key. 

90 """ 

91 

92 @abc.abstractmethod 

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

94 """ 

95 Signs the data. 

96 """ 

97 

98 @abc.abstractmethod 

99 def private_bytes( 

100 self, 

101 encoding: _serialization.Encoding, 

102 format: _serialization.PrivateFormat, 

103 encryption_algorithm: _serialization.KeySerializationEncryption, 

104 ) -> bytes: 

105 """ 

106 The serialized bytes of the private key. 

107 """ 

108 

109 @abc.abstractmethod 

110 def private_bytes_raw(self) -> bytes: 

111 """ 

112 The raw bytes of the private key. 

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

114 """ 

115 

116 

117if hasattr(rust_openssl, "x448"): 

118 Ed448PrivateKey.register(rust_openssl.ed448.Ed448PrivateKey)