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File Content: `ed25519.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.

from __future__ import absolute_import, division, print_function

import abc

import six

from cryptography.exceptions import UnsupportedAlgorithm, _Reasons


_ED25519_KEY_SIZE = 32
_ED25519_SIG_SIZE = 64


@six.add_metaclass(abc.ABCMeta)
class Ed25519PublicKey(object):
    @classmethod
    def from_public_bytes(cls, data):
        from cryptography.hazmat.backends.openssl.backend import backend

        if not backend.ed25519_supported():
            raise UnsupportedAlgorithm(
                "ed25519 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM,
            )

        return backend.ed25519_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 Ed25519PrivateKey(object):
    @classmethod
    def generate(cls):
        from cryptography.hazmat.backends.openssl.backend import backend

        if not backend.ed25519_supported():
            raise UnsupportedAlgorithm(
                "ed25519 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM,
            )

        return backend.ed25519_generate_key()

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

        if not backend.ed25519_supported():
            raise UnsupportedAlgorithm(
                "ed25519 is not supported by this version of OpenSSL.",
                _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM,
            )

        return backend.ed25519_load_private_bytes(data)

    @abc.abstractmethod
    def public_key(self):
        """
        The Ed25519PublicKey derived from the private key.
        """

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

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

Name	Size	Permission
__pycache__	---	0755
__init__.py	1020 bytes	0644
dh.py	5661 bytes	0644
dsa.py	7181 bytes	0644
ec.py	14006 bytes	0644
ed25519.py	2401 bytes	0644
ed448.py	2328 bytes	0644
padding.py	2250 bytes	0644
rsa.py	10494 bytes	0644
utils.py	1363 bytes	0644
x25519.py	2277 bytes	0644
x448.py	2255 bytes	0644

File Content: ed25519.py

File Content: `ed25519.py`