public int processBlock(byte[] in, int inOff, byte[] out, int outOff)
throws DataLengthException, IllegalStateException {
cipher.processBlock(counter, 0, counterOut, 0);
//
// XOR the counterOut with the plaintext producing the cipher text
//
for (int i = 0; i < counterOut.length; i++) {
out[outOff + i] = (byte) (counterOut[i] ^ in[inOff + i]);
}
int carry = 1;
for (int i = counter.length - 1; i >= 0; i--) {
int x = (counter[i] & 0xff) + carry;
if (x > 0xff) {
carry = 1;
} else {
carry = 0;
}
counter[i] = (byte) x;
}
return counter.length;
}
// Encrypt function, ECB mode
private void E(byte[] key, byte[] s, int sOff, byte[] in, int inOff) {
cipher.init(true, new KeyParameter(key));
cipher.processBlock(in, inOff, s, sOff);
}