public override int DoFinal(byte[] output, int outOff)
{
Finish();
UInt64_To_BE(H1, output, outOff, digestLength);
UInt64_To_BE(H2, output, outOff + 8, digestLength - 8);
UInt64_To_BE(H3, output, outOff + 16, digestLength - 16);
UInt64_To_BE(H4, output, outOff + 24, digestLength - 24);
UInt64_To_BE(H5, output, outOff + 32, digestLength - 32);
UInt64_To_BE(H6, output, outOff + 40, digestLength - 40);
UInt64_To_BE(H7, output, outOff + 48, digestLength - 48);
UInt64_To_BE(H8, output, outOff + 56, digestLength - 56);
Reset();
return digestLength;
}