public override void SetParameter(Octets param)
{
Octets k_ipad = new Octets(64);
int keylen = param.size();
if (keylen > 64)
{
Octets key = MD5Hash.Digest(param);
k_ipad.replace(key);
k_opad.replace(key);
keylen = key.size();
}
else
{
k_ipad.replace(param);
k_opad.replace(param);
}
int i = 0;
for (; i < keylen; i++)
{
k_ipad.setByte(i, (byte)(k_ipad.getByte(i) ^ 0x36));
k_opad.setByte(i, (byte)(k_opad.getByte(i) ^ 0x5c));
}
for (; i < 64; i++)
{
k_ipad.setByte(i, (byte)0x36);
k_opad.setByte(i, (byte)0x5c);
}
k_ipad.resize(64);
k_opad.resize(64);
md5hash.Update(k_ipad);
}
internal Octets Update(Octets oin)
{
Octets oout = new Octets();
uint ipos = 0, opos = 0;
byte[] ibuf = oin.buffer();
uint isize = (uint)oin.size();
uint remain = (uint)MPPC.MPPC_HIST_LEN - histptr - legacy_in;
if (isize >= remain)
{
oout.resize((int)(isize + legacy_in) * 9 / 8 + 6);
byte[] obuf = oout.buffer();
Array.Copy(ibuf, ipos, history, histptr + legacy_in, remain);
isize -= remain;
ipos += remain;
compress_block(obuf, ref opos, remain + legacy_in);
histptr = 0;
for (; isize >= (uint)MPPC.MPPC_HIST_LEN;
isize -= (uint)MPPC.MPPC_HIST_LEN, ipos += (uint)MPPC.MPPC_HIST_LEN)
{
Array.Copy(ibuf, ipos, history, histptr, (int)MPPC.MPPC_HIST_LEN);
compress_block(obuf, ref opos, (uint)MPPC.MPPC_HIST_LEN);
histptr = 0;
}
oout.resize((int)opos);
}
Array.Copy(ibuf, ipos, history, histptr + legacy_in, isize);
legacy_in += isize;
return oin.swap(oout);
}