Encrypting/decrypting using RC2

RC2 stands for Rivest’s Code 2. More information can be found on the RSA Security site.

Main.java:

import javax.crypto.spec.*;
import java.security.*;
import javax.crypto.*;
 
public class Main
{
   public static void main(String []args) throws Exception {
      String toEncrypt = "The shorter you live, the longer you're dead!";
 
      System.out.println("Encrypting...");
      byte[] encrypted = encrypt(toEncrypt, "password");
 
      System.out.println("Decrypting...");
      String decrypted = decrypt(encrypted, "password");
    
      System.out.println("Decrypted text: " + decrypted);
   } 
 
   public static byte[] encrypt(String toEncrypt, String key) throws Exception {
      // create a binary key from the argument key (seed)
      SecureRandom sr = new SecureRandom(key.getBytes());
      KeyGenerator kg = KeyGenerator.getInstance("RC2");
      kg.init(sr);
      SecretKey sk = kg.generateKey();
 
      // create an instance of cipher
      Cipher cipher = Cipher.getInstance("RC2");
 
      // initialize the cipher with the key
      cipher.init(Cipher.ENCRYPT_MODE, sk);
 
      // enctypt!
      byte[] encrypted = cipher.doFinal(toEncrypt.getBytes());
 
      return encrypted;
   }
 
   public static String decrypt(byte[] toDecrypt, String key) throws Exception {
      // create a binary key from the argument key (seed)
      SecureRandom sr = new SecureRandom(key.getBytes());
      KeyGenerator kg = KeyGenerator.getInstance("RC2");
      kg.init(sr);
      SecretKey sk = kg.generateKey();
 
      // do the decryption with that key
      Cipher cipher = Cipher.getInstance("RC2");
      cipher.init(Cipher.DECRYPT_MODE, sk);
      byte[] decrypted = cipher.doFinal(toDecrypt);
 
      return new String(decrypted);
   }
}

(tested with the BouncyCastle JCE provider, http://www.bouncycastle.org)