gnu = CipherFactory.getInstance(cipherName);
full = Cipher.getInstance(cipherName, Registry.GNU_CRYPTO);
part1 = Cipher.getInstance(cipherName, Registry.GNU_CRYPTO);
part2 = Cipher.getInstance(cipherName, Registry.GNU_CRYPTO);
// pt = new byte[gnu.defaultBlockSize()];
blockSize = gnu.defaultBlockSize();
pt = new byte[2 * blockSize];
for (i = 0; i < pt.length; i++)
{
pt[i] = (byte) i;
}