javax.crypto.IllegalBlockSizeException: last block incomplete in decryption exception

Question

I am trying to decrypt a string in android. I keep getting the following exception:

08-21 03:56:56.700: W/System.err(4208): javax.crypto.IllegalBlockSizeExceptio         


        

Answer 1

I got the solution.Following is new code that worked for me

// Encryption
public  String encrypt(String message) throws Exception
{
    String message1=Base64.encodeBytes(message.getBytes(),Base64.NO_OPTIONS);
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(message1.getBytes());
    String encrypted=Base64.encodeToString(encVal, Base64.NO_OPTIONS);
    return encrypted;
}

//Decryption    
public String decrypt(String message) throws Exception
{
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    Cipher c = Cipher.getInstance("AES");
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    c.init(Cipher.DECRYPT_MODE, key);
    byte[] decordedValue = Base64.decode(message.getBytes(), Base64.NO_OPTIONS);
    byte[] decValue = c.doFinal(decordedValue);
    String decryptedValue = new String(decValue);
    String decoded=new String(Base64.decode(decryptedValue,Base64.NO_OPTIONS));
    return decoded;
}