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65 lines
1.9 KiB
65 lines
1.9 KiB
from typing import Type |
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from cryptography.hazmat.primitives import serialization |
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from cryptography.hazmat.primitives.asymmetric import ed448, ed25519 |
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from dns.dnssecalgs.cryptography import CryptographyPrivateKey, CryptographyPublicKey |
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from dns.dnssectypes import Algorithm |
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from dns.rdtypes.ANY.DNSKEY import DNSKEY |
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class PublicEDDSA(CryptographyPublicKey): |
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def verify(self, signature: bytes, data: bytes) -> None: |
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self.key.verify(signature, data) |
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def encode_key_bytes(self) -> bytes: |
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"""Encode a public key per RFC 8080, section 3.""" |
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return self.key.public_bytes( |
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encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw |
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) |
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@classmethod |
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def from_dnskey(cls, key: DNSKEY) -> "PublicEDDSA": |
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cls._ensure_algorithm_key_combination(key) |
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return cls( |
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key=cls.key_cls.from_public_bytes(key.key), |
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) |
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class PrivateEDDSA(CryptographyPrivateKey): |
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public_cls: Type[PublicEDDSA] |
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def sign(self, data: bytes, verify: bool = False) -> bytes: |
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"""Sign using a private key per RFC 8080, section 4.""" |
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signature = self.key.sign(data) |
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if verify: |
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self.public_key().verify(signature, data) |
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return signature |
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@classmethod |
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def generate(cls) -> "PrivateEDDSA": |
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return cls(key=cls.key_cls.generate()) |
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class PublicED25519(PublicEDDSA): |
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key: ed25519.Ed25519PublicKey |
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key_cls = ed25519.Ed25519PublicKey |
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algorithm = Algorithm.ED25519 |
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class PrivateED25519(PrivateEDDSA): |
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key: ed25519.Ed25519PrivateKey |
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key_cls = ed25519.Ed25519PrivateKey |
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public_cls = PublicED25519 |
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class PublicED448(PublicEDDSA): |
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key: ed448.Ed448PublicKey |
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key_cls = ed448.Ed448PublicKey |
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algorithm = Algorithm.ED448 |
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class PrivateED448(PrivateEDDSA): |
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key: ed448.Ed448PrivateKey |
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key_cls = ed448.Ed448PrivateKey |
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public_cls = PublicED448
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