public override void Reset()
{
base.Reset();
/* SHA-224 initial hash value
*/
H1 = 0xc1059ed8;
H2 = 0x367cd507;
H3 = 0x3070dd17;
H4 = 0xf70e5939;
H5 = 0xffc00b31;
H6 = 0x68581511;
H7 = 0x64f98fa7;
H8 = 0xbefa4fa4;
xOff = 0;
Array.Clear(X, 0, X.Length);
}