Mega Code Archive
BlowfishCipher
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package com.ack.security.jce;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.swing.JOptionPane;
/**
* This program demonstrates how to encrypt/decrypt input
* using the Blowfish Cipher with the Java Cryptograhpy.
*
*/
public class BlowfishCipher {
public static void main(String[] args) throws Exception {
// create a key generator based upon the Blowfish cipher
KeyGenerator keygenerator = KeyGenerator.getInstance("Blowfish");
// create a key
SecretKey secretkey = keygenerator.generateKey();
// create a cipher based upon Blowfish
Cipher cipher = Cipher.getInstance("Blowfish");
// initialise cipher to with secret key
cipher.init(Cipher.ENCRYPT_MODE, secretkey);
// get the text to encrypt
String inputText = JOptionPane.showInputDialog("Input your message: ");
// encrypt message
byte[] encrypted = cipher.doFinal(inputText.getBytes());
// re-initialise the cipher to be in decrypt mode
cipher.init(Cipher.DECRYPT_MODE, secretkey);
// decrypt message
byte[] decrypted = cipher.doFinal(encrypted);
// and display the results
JOptionPane.showMessageDialog(JOptionPane.getRootFrame(),
"encrypted text: " + new String(encrypted) + "\n" +
"decrypted text: " + new String(decrypted));
// end example
System.exit(0);
}
}
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