/**
* initialise the cipher.
*
* @param forEncryption if true the cipher is initialised for encryption, if false for decryption.
* @param params the key and other data required by the cipher.
* @exception IllegalArgumentException if the params argument is inappropriate.
*/
public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException {
this.forEncryption = forEncryption;
reset();
if (params instanceof ParametersWithRandom) {
ParametersWithRandom p = (ParametersWithRandom) params;
padding.init(p.getRandom());
cipher.init(forEncryption, p.getParameters());
} else {
padding.init(null);
cipher.init(forEncryption, params);
}
}
