Encryption program does not work in IBM JDK

Question

Hi
I have a encrypt, decrypt program, which does not work in IBM JDK
the code is as below, it gives PBEWithMD5AndDES does not exist kind of error when running with IBM JDK
import java.io.UnsupportedEncodingException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class MapsPasswordUtil
     Cipher ecipher;
     Cipher dcipher;
     // 8-byte Salt
     byte[] salt = { (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
               (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03 };
     // Iteration count
     int iterationCount = 19;
     public MapsPasswordUtil(String passPhrase)
          try
               KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt,
                         iterationCount);
               SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES")
                         .generateSecret(keySpec);
               ecipher = Cipher.getInstance(key.getAlgorithm());
               dcipher = Cipher.getInstance(key.getAlgorithm());
               // Prepare the parameter to the ciphers
               AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt,
                         iterationCount);
               // Create the ciphers
               ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
               dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
          } catch (java.security.InvalidAlgorithmParameterException e)
               e.printStackTrace();
          } catch (java.security.spec.InvalidKeySpecException e)
               e.printStackTrace();
          } catch (javax.crypto.NoSuchPaddingException e)
               e.printStackTrace();
          } catch (java.security.NoSuchAlgorithmException e)
               e.printStackTrace();
          } catch (java.security.InvalidKeyException e)
               e.printStackTrace();
     public String encrypt(String str)
          try
               // Encode the string into bytes using utf-8
               byte[] utf8 = str.getBytes("UTF8");
               // Encrypt
               byte[] enc = ecipher.doFinal(utf8);
               // Encode bytes to base64 to get a string
               return new sun.misc.BASE64Encoder().encode(enc);
          } catch (javax.crypto.BadPaddingException e)
               e.printStackTrace();
          } catch (IllegalBlockSizeException e)
               e.printStackTrace();
          } catch (UnsupportedEncodingException e)
               e.printStackTrace();
          return null;
     public String decrypt(String str)
          try
               // Decode base64 to get bytes
               byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
               // Decrypt
               byte[] utf8 = dcipher.doFinal(dec);
               // Decode using utf-8
               return new String(utf8, "UTF8");
          } catch (javax.crypto.BadPaddingException e)
               e.printStackTrace();
          } catch (IllegalBlockSizeException e)
               e.printStackTrace();
          } catch (UnsupportedEncodingException e)
               e.printStackTrace();
          } catch (java.io.IOException e)
               e.printStackTrace();
          return null;
}

Answer 1

Works for me with the latest IBM JDK. You will need to specify your context i.e. what platform, what JDK/JRE etc etc etc.
P.S. That exception handling is rubbish.
Edited by: sabre150 on Mar 23, 2009 6:01 AM
I suspect that you are using JDK 1.5 and that you have fallen foul of the bug where key.getAlgorithm() does net return the correct value. You get round this by specifying it as             SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
            ecipher = Cipher.getInstance("PBEWithMD5AndDES");Of course if you are clever you will just define a static final constant for this algorithm.
Edited by: sabre150 on Mar 23, 2009 6:09 AM