private static String DB_PATH = "/data/data/edu.sharif.ctf/databases/";

public class KeyVerifier
{
  public static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";
  public static final String VALID_LICENCE = "29a002d9340fc4bd54492f327269f3e051619b889dc8da723e135ce486965d84";
  
  public static String bytesToHexString(byte[] paramArrayOfByte)
  {
    StringBuilder localStringBuilder = new StringBuilder();
    int i = paramArrayOfByte.length;
    for (int j = 0;; j++)
    {
      if (j >= i) {
        return localStringBuilder.toString();
      }
      int k = paramArrayOfByte[j];
      Object[] arrayOfObject = new Object[1];
      arrayOfObject[0] = Integer.valueOf(k & 0xFF);
      localStringBuilder.append(String.format("%02x", arrayOfObject));
    }
  }
  
  public static String encrypt(String paramString1, String paramString2, String paramString3)
  {
    try
    {
      SecretKeySpec localSecretKeySpec = new SecretKeySpec(hexStringToBytes(paramString2), "AES");
      Cipher localCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
      localCipher.init(1, localSecretKeySpec, new IvParameterSpec(paramString3.getBytes()));
      String str = bytesToHexString(localCipher.doFinal(paramString1.getBytes()));
      return str;
    }
    catch (Exception localException)
    {
      localException.printStackTrace();
    }
    return "";
  }
  
  public static byte[] hexStringToBytes(String paramString)
  {
    int i = paramString.length();
    byte[] arrayOfByte = new byte[i / 2];
    for (int j = 0;; j += 2)
    {
      if (j >= i) {
        return arrayOfByte;
      }
      arrayOfByte[(j / 2)] = ((byte)((Character.digit(paramString.charAt(j), 16) << 4) + Character.digit(paramString.charAt(j + 1), 16)));
    }
  }
  
  public static boolean isValidLicenceKey(String paramString1, String paramString2, String paramString3)
  {
    return encrypt(paramString1, paramString2, paramString3).equals("29a002d9340fc4bd54492f327269f3e051619b889dc8da723e135ce486965d84");
  }
}




if (KeyVerifier.isValidLicenceKey(localEditText.getText().toString(), MainActivity.this.app.getDataHelper().getConfig().getSecurityKey(), MainActivity.this.app.getDataHelper().getConfig().getSecurityIv()))
        {
          MainActivity.this.app.getDataHelper().updateLicence(2014);
          MainActivity.isRegisterd = true;
          MainActivity.this.showAlertDialog(paramContext, "Thank you, Your application has full licence. Enjoy it...!");
          return;
        }