mirror of
https://github.com/morgan9e/noiseprotocol
synced 2026-04-14 00:14:05 +09:00
e84db3c232
* Created NoiseBackend class serving as a base for backends
* Refactored NoiseProtocol name parsing
* Refactored existing spec-defined functions into abstract classes.
Implementing classes are connecting crypto primitives to expected
interfaces.
* Refactored existing usage of Cryptography as source of crypto into
"default" backend (along with in-house implementation of X448).
* Provisioned "experimental" backend, it will contain e.g. non-default
crypto algorithms
* Backend can be chosen while creating NoiseConnection, though by
default, the Cryptography backend ("default") is used
Closes #7
28 lines
602 B
Python
28 lines
602 B
Python
import abc
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from noise.constants import MAX_NONCE
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class Cipher(metaclass=abc.ABCMeta):
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def __init__(self):
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self.cipher = None
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@property
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@abc.abstractmethod
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def klass(self):
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raise NotImplementedError
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@abc.abstractmethod
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def encrypt(self, k, n, ad, plaintext):
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raise NotImplementedError
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@abc.abstractmethod
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def decrypt(self, k, n, ad, ciphertext):
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raise NotImplementedError
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def rekey(self, k):
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return self.encrypt(k, MAX_NONCE, b'', b'\x00' * 32)[:32]
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def initialize(self, key):
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self.cipher = self.klass(key)
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