85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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import abc
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import six
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from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
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_ED25519_KEY_SIZE = 32
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_ED25519_SIG_SIZE = 64
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@six.add_metaclass(abc.ABCMeta)
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class Ed25519PublicKey(object):
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@classmethod
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def from_public_bytes(cls, data):
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.ed25519_supported():
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raise UnsupportedAlgorithm(
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"ed25519 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
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)
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return backend.ed25519_load_public_bytes(data)
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@abc.abstractmethod
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def public_bytes(self, encoding, format):
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"""
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The serialized bytes of the public key.
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"""
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@abc.abstractmethod
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def verify(self, signature, data):
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"""
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Verify the signature.
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"""
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@six.add_metaclass(abc.ABCMeta)
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class Ed25519PrivateKey(object):
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@classmethod
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def generate(cls):
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.ed25519_supported():
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raise UnsupportedAlgorithm(
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"ed25519 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
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)
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return backend.ed25519_generate_key()
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@classmethod
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def from_private_bytes(cls, data):
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.ed25519_supported():
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raise UnsupportedAlgorithm(
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"ed25519 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
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)
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return backend.ed25519_load_private_bytes(data)
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@abc.abstractmethod
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def public_key(self):
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"""
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The Ed25519PublicKey derived from the private key.
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"""
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@abc.abstractmethod
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def private_bytes(self, encoding, format, encryption_algorithm):
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"""
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The serialized bytes of the private key.
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"""
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@abc.abstractmethod
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def sign(self, data):
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"""
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Signs the data.
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"""
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