public FrameMacProcessor(PublicKey remoteNodeId, EncryptionSecrets secrets)
{
_remoteNodeId = remoteNodeId;
_macSecret = secrets.MacSecret;
_egressMac = secrets.EgressMac;
_egressMacCopy = (KeccakDigest)_egressMac.Copy();
_ingressMac = secrets.IngressMac;
_ingressMacCopy = (KeccakDigest)_ingressMac.Copy();
_aesEngine = MakeMacCipher();
_checkMacBuffer = new byte[_ingressMac.GetDigestSize()];
_addMacBuffer = new byte[_ingressMac.GetDigestSize()];
_ingressAesBlockBuffer = new byte[_ingressMac.GetDigestSize()];
_egressAesBlockBuffer = new byte[_ingressMac.GetDigestSize()];
}
public void Squeeze(sbyte[] trits, int offset, int?length)
{
if (!length.HasValue)
{
length = trits.Length;
}
if (((length % 243) != 0))
{
throw new Exception("Illegal length provided");
}
do
{
// get the hash digest
var kCopy = (Sha3Digest)sha3Digest.Copy();
byte[] final = new byte[48];
var fLen = kCopy.DoFinal(final, 0);
// Convert words to trits and then map it into the internal state
var trit_state = Words.words_to_trits(ConvertToInt32Array(final));
var i = 0;
var limit = (length < Curl.HASH_LENGTH ? length : Curl.HASH_LENGTH);
while (i < limit)
{
trits[offset++] = trit_state[i++];
}
sha3Digest.Reset();
for (i = 0; i < final.Length; i++)
{
final[i] = (byte)(final[i] ^ 0xFF); //(byte)(final[i] ^ 0xFFFFFFFF);
}
sha3Digest.BlockUpdate(final, 0, final.Length);
} while ((length -= Curl.HASH_LENGTH) > 0);
}
