Question

I am developing a BlackBerry application where the server is in Java. Whenever AES encrypted data is sent to server along with PKCS5 Formatting,The server gets bad padding exception while decrypting it.

Answer 1

Is that the Blackberry or the server code? Have you tried using the standard JCE classes? something like this:

Cipher aes = Cipher.getInstance("AES/ECB/PKCS5Padding");
SecretKeySpec key = new SecretKeySpec(yourKeyBytes, "AES");
aes.init(Cipher.DECRYPT_MODE, key);
byte[] cleartext = aes.update(ciphertext, 0, ciphertext.length);