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11
12import java.lang.Math; // headers MUST be above the first class
13import java.lang.reflect.Array;
14import java.util.Arrays;
15import javax.crypto.Cipher;
16import javax.crypto.SecretKey;
17import javax.crypto.spec.IvParameterSpec;
18import javax.crypto.spec.SecretKeySpec;
19import java.util.Base64;
20
21// one class needs to have a main() method
22public class HelloWorld
23{
24  // arguments are passed using the text field below this editor
25  public static void main(String[] args)
26  {
27    // GET PRIVATE KEY
28  	String key = "C38FB23A402222A0C17D34A92F971D1F";
29    SecretKeySpec secretKey = null;
30    byte[] keyBytes = new byte[32];
31    Arrays.fill(keyBytes, (byte) 0);
32    try {
33      byte[] passwordBytes = key.getBytes("UTF-8");
34      System.arraycopy(passwordBytes, 0, keyBytes, 0, passwordBytes.length < keyBytes.length ? passwordBytes.length : keyBytes.length);
35      System.out.println("Special key = " + keyBytes);
36      secretKey = new SecretKeySpec(keyBytes, "AES");
37    } catch (Exception e) {
38     	System.out.println(e.getMessage()); 
39    }
40    String stringToEncode = "platform=android&applicationKey=1&applicationUserId=1&sdkVersion=6.6.8.1&appVer=1&osVer=8&devMake=1&devModel=1";
41    String str;
42    try {
43      SecretKeySpec skeySpec = secretKey;
44      System.out.println(skeySpec.getEncoded().length);
45      byte[] clearText = stringToEncode.getBytes("UTF8");
46      byte[] iv = new byte[16];
47      Arrays.fill(iv, (byte) 0);
48      IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
49      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
50      cipher.init(1, skeySpec, ivParameterSpec);
51      str = Base64.getEncoder().encodeToString(cipher.doFinal(clearText)).replaceAll(System.getProperty("line.separator"), "");
52      System.out.println("result = " + str);
53    } catch (Exception e) {
54      e.printStackTrace();
55      str = "";
56    }
57  }
58}