BadPaddingException using DES

[Aravind Ramanujam]

I'm getting javax.crypto.BadPaddingException: Given final block not properly padded while trying to decrypt using DES. Here is the code snippet:

 
private static byte[] cleartext ;
private static byte[] cipherText ;
 
Cipher dcipher;
Cipher ecipher;
KeyGenerator keygen;
SecretKey desKey;
 
public static byte[] encryptCreditCard(String ccno){
try{            
keygen = KeyGenerator.getInstance("DES");
desKey = keygen.generateKey();
ecipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
ecipher.init(Cipher.ENCRYPT_MODE, desKey);
cipherText= ecipher.doFinal(ccno.getBytes());
} catch (BadPaddingException e) {
System.out.println("Caught BadPaddingException in encryptCreditCard method in CryptoTestclass " + e);
} catch (IllegalBlockSizeException e) {
System.out.println("Caught IllegalBlockSizeException in encryptCreditCard method in CryptoTestclass " + e);
} catch (Exception e){            
System.out.println("Caught Exception in encryptCreditCard method in CryptoTestclass " + e);
}
return cipherText;
}
 
public static byte[] decryptCreditCard(String encryptedCardNum){
try{            
keygen= KeyGenerator.getInstance("DES");
desKey = keygen.generateKey();
dcipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
dcipher.init(Cipher.DECRYPT_MODE, desKey);
cleartext = dcipher.doFinal(encryptedCardNum.getBytes());
} catch (BadPaddingException e) {
System.out.println("Caught BadPaddingException in decryptCreditCard method in CryptoTestclass " + e);
} catch (IllegalBlockSizeException e) {
System.out.println("Caught IllegalBlockSizeException in decryptCreditCard method in CryptoTestclass " + e);
} catch (Exception e){            
System.out.println("Caught Exception in decryptCreditCard method in CryptoTestclass " + e);
}
return cleartext;
}

Please let me know if i'm doing anything wrong here. Any help is appreciated

[Ulf Dittmer]

A quick search through the forum would have uncovered this thread. Let us know of if that's the problem.