forked from STI/Astroport.ONE
113 lines
3.3 KiB
Python
113 lines
3.3 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 annotations
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import abc
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from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
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from cryptography.hazmat.bindings._rust import openssl as rust_openssl
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from cryptography.hazmat.primitives import _serialization
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class X448PublicKey(metaclass=abc.ABCMeta):
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@classmethod
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def from_public_bytes(cls, data: bytes) -> X448PublicKey:
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.x448_supported():
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raise UnsupportedAlgorithm(
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"X448 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
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)
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return rust_openssl.x448.from_public_bytes(data)
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@abc.abstractmethod
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def public_bytes(
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self,
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encoding: _serialization.Encoding,
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format: _serialization.PublicFormat,
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) -> bytes:
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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 public_bytes_raw(self) -> bytes:
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"""
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The raw bytes of the public key.
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Equivalent to public_bytes(Raw, Raw).
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"""
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@abc.abstractmethod
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def __eq__(self, other: object) -> bool:
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"""
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Checks equality.
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"""
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if hasattr(rust_openssl, "x448"):
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X448PublicKey.register(rust_openssl.x448.X448PublicKey)
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class X448PrivateKey(metaclass=abc.ABCMeta):
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@classmethod
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def generate(cls) -> X448PrivateKey:
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.x448_supported():
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raise UnsupportedAlgorithm(
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"X448 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
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)
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return rust_openssl.x448.generate_key()
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@classmethod
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def from_private_bytes(cls, data: bytes) -> X448PrivateKey:
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from cryptography.hazmat.backends.openssl.backend import backend
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if not backend.x448_supported():
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raise UnsupportedAlgorithm(
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"X448 is not supported by this version of OpenSSL.",
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_Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
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)
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return rust_openssl.x448.from_private_bytes(data)
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@abc.abstractmethod
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def public_key(self) -> X448PublicKey:
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"""
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Returns the public key associated with this private key
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"""
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@abc.abstractmethod
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def private_bytes(
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self,
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encoding: _serialization.Encoding,
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format: _serialization.PrivateFormat,
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encryption_algorithm: _serialization.KeySerializationEncryption,
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) -> bytes:
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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 private_bytes_raw(self) -> bytes:
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"""
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The raw bytes of the private key.
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Equivalent to private_bytes(Raw, Raw, NoEncryption()).
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"""
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@abc.abstractmethod
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def exchange(self, peer_public_key: X448PublicKey) -> bytes:
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"""
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Performs a key exchange operation using the provided peer's public key.
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"""
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if hasattr(rust_openssl, "x448"):
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X448PrivateKey.register(rust_openssl.x448.X448PrivateKey)
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