private static bool GCryptEncrypt(IntPtr h, IntPtr pbZero, IntPtr pbBuf,
ulong uRounds, byte[] pbOut16)
{
ulong r = 0;
while (uRounds != 0)
{
r = Math.Min(uRounds, (ulong)GCryptBufBlocks);
IntPtr cb = new IntPtr((int)r << 4);
if (NativeMethods.gcry_cipher_encrypt(h, pbBuf, cb, pbZero, cb) != 0)
{
Debug.Assert(false);
return(false);
}
uRounds -= r;
}
if ((pbOut16 != null) && (r != 0))
{
Marshal.Copy(MemUtil.AddPtr(pbBuf, ((long)r - 1) << 4), pbOut16, 0, 16);
}
return(true);
}
