GenToken.java


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import java.util.Calendar;
import java.util.Date;

import java.nio.charset.Charset;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class GenToken
{
  public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
  public static final String HMAC_SHA256 = "HmacSHA256";
  public static final String UTF_8 = "UTF-8";

  public static String bytesToHex(byte[] paramArrayOfByte)
  {
    StringBuilder localStringBuilder = new StringBuilder();
    int j = paramArrayOfByte.length;
    int i = 0;
    while (i < j)
    {
      localStringBuilder.append(String.format("%02x", new Object[] { Byte.valueOf(paramArrayOfByte[i]) }).toUpperCase());
      i += 1;
    }
    return localStringBuilder.toString();
  }
  public static void main(String[] args) {
    System.out.print(getToken( ) );
  }
  public static String getToken()
  {
    Object localObject = new SimpleDateFormat("yyyyMMddHH");
    ((DateFormat)localObject).setTimeZone(TimeZone.getTimeZone("UTC"));
    String text = ((DateFormat)localObject).format(Calendar.getInstance().getTime());
    try{
      localObject = Mac.getInstance("HmacSHA256");
      ((Mac)localObject).init(new SecretKeySpec("ZhQCqoZp".getBytes(DEFAULT_CHARSET), "HmacSHA256"));
      String text2 = bytesToHex(((Mac)localObject).doFinal(text.getBytes(DEFAULT_CHARSET)));
      return text2;
    }catch (InvalidKeyException error)
    {
      throw new Error("Invalid key error");
    }
    catch (NoSuchAlgorithmException error)
    {
      throw new Error("Cannot initialize token");
    }
  }
}