/** * initialise a RC5-64 cipher. * * @param forEncryption whether or not we are for encryption. * @param params the parameters required to set up the cipher. * @exception IllegalArgumentException if the params argument is inappropriate. */ public void init(boolean forEncryption, CipherParameters params) { if (!(params instanceof RC5Parameters)) { throw new IllegalArgumentException( "invalid parameter passed to RC564 init - " + params.getClass().getName()); } RC5Parameters p = (RC5Parameters) params; this.forEncryption = forEncryption; _noRounds = p.getRounds(); setKey(p.getKey()); }
/** * initialise a RC4 cipher. * * @param forEncryption whether or not we are for encryption. * @param params the parameters required to set up the cipher. * @exception IllegalArgumentException if the params argument is inappropriate. */ public void init(boolean forEncryption, CipherParameters params) { if (params instanceof KeyParameter) { /* * RC4 encryption and decryption is completely * symmetrical, so the 'forEncryption' is * irrelevant. */ workingKey = ((KeyParameter) params).getKey(); setKey(workingKey); return; } throw new IllegalArgumentException( "invalid parameter passed to RC4 init - " + params.getClass().getName()); }