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__pycache__	-	Open
base.py	2.39 MB	View DL Edit
cryptography.py	2.37 MB	View DL Edit
dsa.py	3.42 MB	View DL Edit
ecdsa.py	2.95 MB	View DL Edit
eddsa.py	1.87 MB	View DL Edit
rsa.py	3.47 MB	View DL Edit
__init__.py	4.18 MB	View DL Edit

Edit file: /usr/lib/python3.9/site-packages/dns/dnssecalgs/cryptography.py

from typing import Any, Optional, Type

from cryptography.hazmat.primitives import serialization

from dns.dnssecalgs.base import GenericPrivateKey, GenericPublicKey
from dns.exception import AlgorithmKeyMismatch

class CryptographyPublicKey(GenericPublicKey):
    key: Any = None
    key_cls: Any = None

def __init__(self, key: Any) -> None:  # pylint: disable=super-init-not-called
        if self.key_cls is None:
            raise TypeError("Undefined private key class")
        if not isinstance(  # pylint: disable=isinstance-second-argument-not-valid-type
            key, self.key_cls
        ):
            raise AlgorithmKeyMismatch
        self.key = key

@classmethod
    def from_pem(cls, public_pem: bytes) -> "GenericPublicKey":
        key = serialization.load_pem_public_key(public_pem)
        return cls(key=key)

def to_pem(self) -> bytes:
        return self.key.public_bytes(
            encoding=serialization.Encoding.PEM,
            format=serialization.PublicFormat.SubjectPublicKeyInfo,
        )

class CryptographyPrivateKey(GenericPrivateKey):
    key: Any = None
    key_cls: Any = None
    public_cls: Type[CryptographyPublicKey]

def __init__(self, key: Any) -> None:  # pylint: disable=super-init-not-called
        if self.key_cls is None:
            raise TypeError("Undefined private key class")
        if not isinstance(  # pylint: disable=isinstance-second-argument-not-valid-type
            key, self.key_cls
        ):
            raise AlgorithmKeyMismatch
        self.key = key

def public_key(self) -> "CryptographyPublicKey":
        return self.public_cls(key=self.key.public_key())

@classmethod
    def from_pem(
        cls, private_pem: bytes, password: Optional[bytes] = None
    ) -> "GenericPrivateKey":
        key = serialization.load_pem_private_key(private_pem, password=password)
        return cls(key=key)

def to_pem(self, password: Optional[bytes] = None) -> bytes:
        encryption_algorithm: serialization.KeySerializationEncryption
        if password:
            encryption_algorithm = serialization.BestAvailableEncryption(password)
        else:
            encryption_algorithm = serialization.NoEncryption()
        return self.key.private_bytes(
            encoding=serialization.Encoding.PEM,
            format=serialization.PrivateFormat.PKCS8,
            encryption_algorithm=encryption_algorithm,
        )

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