public NoiseMessageTransformer(IHkdf hkdf, ICipherFunction writer, ICipherFunction reader, ILogger <NoiseMessageTransformer> logger)
{
_hkdf = hkdf;
_writer = writer;
_reader = reader;
_logger = logger;
_writerChainingKey = new byte[32];
_readerChainingKey = new byte[32];
}
public HandshakeProcessor(IEllipticCurveActions curveActions, IHkdf hkdf,
ICipherFunction aeadConstruction, IKeyGenerator keyGenerator, INoiseHashFunction hasher,
INoiseMessageTransformer messageTransformer, ILogger <HandshakeProcessor> logger)
{
_curveActions = curveActions;
_hkdf = hkdf;
_aeadConstruction = aeadConstruction;
_keyGenerator = keyGenerator;
_hasher = hasher;
_messageTransformer = messageTransformer;
_logger = logger;
}
private void KeyRecycle(ICipherFunction cipherFunction, byte[] chainingKey)
{
if (cipherFunction.GetNonce() < LightningNetworkConfig.NUMBER_OF_NONCE_BEFORE_KEY_RECYCLE)
{
return;
}
_logger.LogDebug($"Recycling cipher key");
Span <byte> keys = stackalloc byte[Aead.KEY_SIZE * 2];
_hkdf.ExtractAndExpand(chainingKey, cipherFunction.GetKey(), keys);
// set new chaining key
keys.Slice(0, Aead.KEY_SIZE)
.CopyTo(chainingKey);
// set new key
cipherFunction.SetKey(keys.Slice(Aead.KEY_SIZE));
_logger.LogDebug($"Cipher key recycled successfully");
}
