mqtt連接參數生成

 

 

 

 

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SignatureException;
import java.util.Formatter;
import java.util.Scanner;
import java.util.UUID;

public class AutoIotPram {

    public static void main(String[] args) throws NoSuchAlgorithmException, SignatureException, InvalidKeyException {

        Scanner input = new Scanner(System.in);


        System.out.print("請輸入【productKey】  ：");
        String productKey = input.nextLine();
        while (productKey == null || "".equals(productKey)){
            System.out.print("請輸入【productKey】  ：");
             productKey = input.nextLine();
        }

        System.out.print("請輸入【deviceName】  ：");
        String deviceName =  input.nextLine();
        while (deviceName == null || "".equals(deviceName)){
            System.out.print("請輸入【deviceName】  ：");
            deviceName = input.nextLine();
        }

        System.out.print("請輸入【deviceSecret】：");
        String deviceSecret =  input.nextLine();
        while (deviceSecret == null || "".equals(deviceSecret)){
            System.out.print("請輸入【deviceSecret】  ：");
            deviceSecret = input.nextLine();
        }

        System.out.println();
        System.out.println("生成mqtt連接參數中....");
        System.out.println();

        String clientId = UUID.randomUUID().toString().replace("-", "").toUpperCase();
        String region = "cn-shanghai";
        String data = "clientId" + clientId + "deviceName" + deviceName + "productKey" + productKey;

        System.out.println("port     : 1883");
        System.out.println("address  : " + productKey + ".iot-as-mqtt." + region + ".aliyuncs.com");
        System.out.println("clientId : " + clientId + "|securemode=3,signmethod=hmacsha1|");
        System.out.println("userName : " + deviceName + "&" + productKey);
        System.out.println("passwd   : " + re(data, deviceSecret).toUpperCase());

        System.out.println();
        System.out.println("是否退出（Y/n）:");
        String str = input.nextLine();
        while (!"Y".equals(str.toUpperCase())){
            System.out.println("是否退出（Y/n）:");
            str = input.nextLine();
        }

        System.exit(0);


    }



    private static String re(String data, String key) throws SignatureException, NoSuchAlgorithmException, InvalidKeyException, InvalidKeyException, NoSuchAlgorithmException, InvalidKeyException {
        SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), HMAC_SHA1_ALGORITHM);
        Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
        mac.init(signingKey);
        return toHexString(mac.doFinal(data.getBytes()));

    }


    private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";
    private static String toHexString(byte[] bytes) {
        Formatter formatter = new Formatter();
        for (byte b : bytes) {
            formatter.format("%02x", b);
        }
        return formatter.toString();
    }


}