import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;


public class AESUtils {
    private static int ENCRYPTION_BITS = 128;


    public static String encryptMessage(String message, String secretKey) {
        try {
            Cipher aesCipher = Cipher.getInstance("AES");
            aesCipher.init(Cipher.ENCRYPT_MODE, createSecretKeyFromString(secretKey));

            byte[] encryptedBytes = aesCipher.doFinal(message.getBytes());

            return Base64.encodeBase64String(encryptedBytes);
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }


    private static SecretKey createSecretKeyFromString(String secretKey) {
        byte[] d = Base64.decodeBase64(secretKey);
        SecretKey key = new SecretKeySpec(d, 0, d.length, "AES");
        return key;
    }
}
	
import org.apache.commons.lang3.time.DateFormatUtils;

import java.util.Date;

public class TokenGenerator {
    private static final String CONDENSED_DATE_FORMAT = "yyyyMMddHHmmssSSSZ";
    public static void main(String [] args){

        if(args.length ==4){
            System.out.println(generateToken(args[0],args[1],Integer.parseInt(args[2]),Integer.parseInt(args[3])));
        }else{
            System.out.println("Please pass following parameters");
            System.out.println("tokenId nsecretKey nuses nttl");
        }


    }

    public static String generateToken(String tokenId, String secretKey,int uses, int ttl) {
        StringBuilder s = new StringBuilder();
        s.append("d=");
        s.append(DateFormatUtils.format(new Date(), CONDENSED_DATE_FORMAT));
        s.append(";");
        s.append("c="+uses);
        s.append(";");
        s.append("t="+uses);

        String payload = s.toString();
        System.out.println("payload", payload);
        return tokenId + ":" + AESUtils.encryptMessage(payload, secretKey);
    }
}
	
String secretKey = 'xxxxxxxxxxxxxxxxxxxxxx==';
            String tokenId = 'xxxxxxxxxxxx';
            Datetime d = System.now();
            String payload = 'd='+d.format('yyyyMMddHHmmssSSSZ')+';c='+10+';t='+10;
            system.debug('payload' + payload);
            String message = tokenId + ':' + encryptMessage(payload, secretKey);

 public static string encryptMessage(String message, String secretKey){
        Blob key = EncodingUtil.base64Decode(secretKey);
        Blob data = Blob.valueOf(message);
        Blob encrypted = Crypto.encryptWithManagedIV('AES128', key, data);
        return EncodingUtil.base64Encode(encrypted);
    }