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from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import x25519, x448
from noiseprotocol.exceptions import NoiseValueError
from noiseprotocol.functions.keypair import KeyPair
class KeyPair25519(KeyPair):
@classmethod
def from_private_bytes(cls, private_bytes):
if len(private_bytes) != 32:
raise NoiseValueError('Invalid length of private_bytes! Should be 32')
private = x25519.X25519PrivateKey.from_private_bytes(private_bytes)
public = private.public_key()
return cls(private=private, public=public, public_bytes=public.public_bytes(encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw))
@classmethod
def from_public_bytes(cls, public_bytes):
if len(public_bytes) != 32:
raise NoiseValueError('Invalid length of public_bytes! Should be 32')
public = x25519.X25519PublicKey.from_public_bytes(public_bytes)
return cls(public=public, public_bytes=public.public_bytes(encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw))
class KeyPair448(KeyPair):
@classmethod
def from_private_bytes(cls, private_bytes):
if len(private_bytes) != 56:
raise NoiseValueError('Invalid length of private_bytes! Should be 56')
private = x448.X448PrivateKey.from_private_bytes(private_bytes)
public = private.public_key()
return cls(private=private, public=public, public_bytes=public.public_bytes(encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw))
@classmethod
def from_public_bytes(cls, public_bytes):
if len(public_bytes) != 56:
raise NoiseValueError('Invalid length of private_bytes! Should be 56')
public = x448.X448PublicKey.from_public_bytes(public_bytes)
return cls(public=public, public_bytes=public.public_bytes(encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw))
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