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# 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.

from __future__ import absolute_import, division, print_function

import abc

import six

from cryptography.exceptions import UnsupportedAlgorithm, _Reasons

@six.add_metaclass(abc.ABCMeta)
class Ed448PublicKey(object):
    @classmethod
    def from_public_bytes(cls, data):
        from cryptography.hazmat.backends.openssl.backend import backend

if not backend.ed448_supported():
            raise UnsupportedAlgorithm(
                "ed448 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM,
            )

return backend.ed448_load_public_bytes(data)

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

@abc.abstractmethod
    def verify(self, signature, data):
        """
        Verify the signature.
        """

@six.add_metaclass(abc.ABCMeta)
class Ed448PrivateKey(object):
    @classmethod
    def generate(cls):
        from cryptography.hazmat.backends.openssl.backend import backend

if not backend.ed448_supported():
            raise UnsupportedAlgorithm(
                "ed448 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM,
            )
        return backend.ed448_generate_key()

@classmethod
    def from_private_bytes(cls, data):
        from cryptography.hazmat.backends.openssl.backend import backend

return backend.ed448_load_private_bytes(data)

@abc.abstractmethod
    def public_key(self):
        """
        The Ed448PublicKey derived from the private key.
        """

@abc.abstractmethod
    def sign(self, data):
        """
        Signs the data.
        """

@abc.abstractmethod
    def private_bytes(self, encoding, format, encryption_algorithm):
        """
        The serialized bytes of the private key.
        """

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