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 backend.ed448_load_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 return backend.ed448_generate_key() 

72 

73 @classmethod 

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

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

76 

77 if not backend.ed448_supported(): 

78 raise UnsupportedAlgorithm( 

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

80 _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM, 

81 ) 

82 

83 return backend.ed448_load_private_bytes(data) 

84 

85 @abc.abstractmethod 

86 def public_key(self) -> Ed448PublicKey: 

87 """ 

88 The Ed448PublicKey derived from the private key. 

89 """ 

90 

91 @abc.abstractmethod 

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

93 """ 

94 Signs the data. 

95 """ 

96 

97 @abc.abstractmethod 

98 def private_bytes( 

99 self, 

100 encoding: _serialization.Encoding, 

101 format: _serialization.PrivateFormat, 

102 encryption_algorithm: _serialization.KeySerializationEncryption, 

103 ) -> bytes: 

104 """ 

105 The serialized bytes of the private key. 

106 """ 

107 

108 @abc.abstractmethod 

109 def private_bytes_raw(self) -> bytes: 

110 """ 

111 The raw bytes of the private key. 

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

113 """ 

114 

115 

116if hasattr(rust_openssl, "x448"): 

117 Ed448PrivateKey.register(rust_openssl.ed448.Ed448PrivateKey)