Javax.crypto.IllegalBlockSizeException: Input data length not a multiple

Question

Hi All ,
M worknig with NWCE 7.1.1. I have written code for decryption for decryption.  Earlier my web dynpro application was on CE7.1. We migrated it to CE 7.1.1 just week ago after migrating to CE 7.1.1 , on execution of decryption code m gtting as
javax.crypto.IllegalBlockSizeException: Input data length not a multiple of blocksize
i have written following code for decryption.
public String decrypt( String encryptedString, String encryptionKey )
     String UNICODE_FORMAT = "UTF8";
     try
          if ( encryptedString == null || encryptedString.trim().length() <= 0 )
               throw new IllegalArgumentException( "encrypted string was null or empty" );
            byte[] keyAsBytes = encryptionKey.getBytes(UNICODE_FORMAT);
            keySpec = new DESKeySpec(keyAsBytes);
            keyFactory = SecretKeyFactory.getInstance( "DES" );
            cipher = Cipher.getInstance( "DES" );
          SecretKey key = keyFactory.generateSecret( keySpec );
          cipher.init( Cipher.DECRYPT_MODE, key );
          BASE64Decoder base64decoder = new BASE64Decoder();
          byte[] cleartext = base64decoder.decodeBuffer( encryptedString );
          byte[] ciphertext = cipher.doFinal( cleartext );
          return new String( ciphertext );
     }catch (Exception e){
          IWDMessageManager messageManager = wdComponentAPI.getMessageManager();
          messageManager.reportException("Error while Decryption");
          e.printStackTrace();
          return "";
This code was working fine in CE 7.1 . After migrating to CE 7.1.1 it started giving this error.

Answer 1

Thank you for your answer
how the code is usedI have hardcoded key, example
byte[] key = "123456789abcdefg".getBytes();and String for crypt (Example, String in = "green";)
Then I encrypt string in with code above (in qwestion body) and get exception IllegalBlockSizeException: Input data length not a multiple of blocksize
String encrypt(String in) throws Exception{
  String out="";
  byte[] key = "123456789abcdefg".getBytes();
  Cipher ecipher = Cipher.getInstance("AES");
  ecipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "AES"));
  byte[] utf8 = in.getBytes("UTF8");
  byte[] enc = ecipher.doFinal(utf8);
  out = (new sun.misc.BASE64Encoder().encode(enc)).toString();
  return out;
}Clients use JRE1.4 or high. I have JRE1.4 and all work correctly. Also, many clients have 1.4, but only part of they get exception. Code is in the server (this is part of servlet)
This function run in one thread and doesn't use shared resources