/*
* Duplicate this engine. The returned instance inherits the
* current state (key, data already processed...) but is
* thereafter independent.
*/
public HMAC Dup()
{
HMAC hm = new HMAC(h.Dup(), false);
Array.Copy(key, 0, hm.key, 0, keyLen);
hm.keyLen = keyLen;
hm.dataLen = dataLen;
return(hm);
}
/*
* Create the instance over the provided hash function
* implementation. The digest instance is linked in and will
* be used repeatedly. The engine is not seeded yet.
*/
public HMAC_DRBG(IDigest h)
{
hm = new HMAC(h.Dup());
int len = h.DigestSize;
K = new byte[len];
V = new byte[len];
seeded = false;
Reset();
}
