title: Decryption using AES 256 with key and salt values using Java
body: <p>I'm trying to make decryption logic and knnow that encrypted string has been made using:
  Key: 8d6ea4d3e6f8c4f8641516baa5e42b85
  transformation: AES/CBC/ISO10126PADDING
  salt: 1c4dd21d7ba43bdd
  iterations: 0
  Encrypted string: JO0blEp+nEl5nNhgUqoZRJNecogM1XHIXUCatPOJycs=</p>
  
  <p>Key and salt are given samples here..The main point is to show the format in which I have this data. encryption methods is based on the default JCE provider of the JDK (SunJCE).</p>
  
  <p>Now based on this infromation I have above, I'm trying to build Decryption logic. Few doubts:
  1. As the AES-265 is used, can it have 128 bits Key and 64 bit salt values? or I'm interpreting the information wrongly.
  2. seeing the encrypted string, it looks like it is Base64 encoded value and we need to decode it while decrypting. Is my understanding correct?
  3. Below is the decryption logic that I'm writing that is giving error: "javax.crypto.BadPaddingException: Given final block not properly padded" when I call doFinal() function.
  and I'm struck here from last three days:( . Can you please point out or give me the exact code that to be used here for decryption with having infromation:</p>
  
  <pre><code>    public static void main(String[] args) throws Exception
   {
          String encstring = "JO0blEp+nEl5nNhgUqoZRJNecogM1XHIXUCatPOJycs=";           
          String salt1 = "1c4dd21d7ba43bdd";
          String keyStr = "8d6ea4d3e6f8c4f8641516baa5e42b85";
  
  
          byte[] keyBytes = Hex.decodeHex(keyStr.toCharArray());
  
          SecretKey secret2 = new SecretKeySpec(keyBytes, "AES");
  
          byte[] iv = new byte[]{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
          AlgorithmParameterSpec params = new IvParameterSpec(iv);
  
  
          Cipher cipher2 = Cipher.getInstance("AES/CBC/ISO10126PADDING", "SunJCE");
  
  
          cipher2.init(Cipher.DECRYPT_MODE, secret2, params);  
          byte[] encryptedString = Base64.decodeBase64(encstring.getBytes());
          byte[] plaintext1 = cipher2.doFinal(encryptedString);
  
          System.out.println(new String(plaintext));   
          }
      }
  </code></pre>