public byte[] update(byte[] inp, int inpOff, int inpLen) {
int neededLen = bp.getUpdateOutputSize(inpLen);
byte[] outp = null;
if (neededLen > 0) outp = new byte[neededLen];
else neededLen = 0;
bp.processBytes(inp, inpOff, inpLen, outp, 0);
return outp;
}
public byte[] doFinal() {
int neededLen = bp.getOutputSize(0);
byte[] outp = new byte[neededLen];
int n = 0;
try {
n = bp.doFinal(outp, 0);
} catch (Exception ex) {
return outp;
}
if (n != outp.length) {
byte[] outp2 = new byte[n];
System.arraycopy(outp, 0, outp2, 0, n);
return outp2;
} else return outp;
}
/** Creates a new instance of AESCipher */
public AESCipher(boolean forEncryption, byte[] key, byte[] iv) {
BlockCipher aes = new AESFastEngine();
BlockCipher cbc = new CBCBlockCipher(aes);
bp = new PaddedBufferedBlockCipher(cbc);
KeyParameter kp = new KeyParameter(key);
ParametersWithIV piv = new ParametersWithIV(kp, iv);
bp.init(forEncryption, piv);
}