golden hour

/usr/lib64/python3.9/site-packages/cryptography/hazmat/primitives/asymmetric

File/Folder	Size	Actions
__init__.py	956 B
__pycache__	-
dh.py	6.42 KB
dsa.py	8.21 KB
ec.py	14.67 KB
ed25519.py	2.66 KB
ed448.py	2.58 KB
padding.py	2.09 KB
rsa.py	11.53 KB
types.py	896 B
utils.py	742 B
x25519.py	2.53 KB
x448.py	2.5 KB

Edit: x448.py

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

import abc

from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
from cryptography.hazmat.primitives import _serialization

class X448PublicKey(metaclass=abc.ABCMeta):
    @classmethod
    def from_public_bytes(cls, data: bytes) -> "X448PublicKey":
        from cryptography.hazmat.backends.openssl.backend import backend

if not backend.x448_supported():
            raise UnsupportedAlgorithm(
                "X448 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
            )

return backend.x448_load_public_bytes(data)

@abc.abstractmethod
    def public_bytes(
        self,
        encoding: _serialization.Encoding,
        format: _serialization.PublicFormat,
    ) -> bytes:
        """
        The serialized bytes of the public key.
        """

class X448PrivateKey(metaclass=abc.ABCMeta):
    @classmethod
    def generate(cls) -> "X448PrivateKey":
        from cryptography.hazmat.backends.openssl.backend import backend

if not backend.x448_supported():
            raise UnsupportedAlgorithm(
                "X448 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
            )
        return backend.x448_generate_key()

@classmethod
    def from_private_bytes(cls, data: bytes) -> "X448PrivateKey":
        from cryptography.hazmat.backends.openssl.backend import backend

return backend.x448_load_private_bytes(data)

@abc.abstractmethod
    def public_key(self) -> X448PublicKey:
        """
        The serialized bytes of the public key.
        """

@abc.abstractmethod
    def private_bytes(
        self,
        encoding: _serialization.Encoding,
        format: _serialization.PrivateFormat,
        encryption_algorithm: _serialization.KeySerializationEncryption,
    ) -> bytes:
        """
        The serialized bytes of the private key.
        """

@abc.abstractmethod
    def exchange(self, peer_public_key: X448PublicKey) -> bytes:
        """
        Performs a key exchange operation using the provided peer's public key.
        """