package com.dsh.utils;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Map;
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import java.util.TreeMap;
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/**
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* @author 张鹏
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* @date 2020/9/1 11:20
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* <p>
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* 加密方法
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*/
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public class SignUtils {
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/**
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* 请求url的所有参数拼接成字符串
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*
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* @param map
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* @return
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*/
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public static String createQueryString(Map<String, String> map) {
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if (map.isEmpty()) {
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return null;
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}
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StringBuilder res = new StringBuilder();
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for (String key : map.keySet()) {
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String value = map.get(key);
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if (null == key || "".equals(key)) {
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continue;
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}
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try {
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if (null != value && !"".equals(value)) {
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res.append(key).append("=").append(URLEncoder.encode(value, "UTF-8")).append("&");
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} else {
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res.append(key).append("=").append(value).append("&");
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}
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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}
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if (res.length() > 1) {
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return res.substring(0, res.length() - 1);
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}
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return null;
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}
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/**
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* 通过md5进行加密
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*
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* @param source 要加密的数据
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* @return
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* @throws NoSuchAlgorithmException
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*/
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private static String getMd5(String source) throws NoSuchAlgorithmException {
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MessageDigest digest = MessageDigest.getInstance("md5");
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byte[] bytes = source.getBytes();
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byte[] targetBytes = digest.digest(bytes);
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char[] characters = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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StringBuilder builder = new StringBuilder();
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for (byte b : targetBytes) {
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int high = (b >> 4) & 15;
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int low = b & 15;
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char highChar = characters[high];
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char lowChar = characters[low];
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builder.append(highChar).append(lowChar);
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}
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return builder.toString();
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}
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/**
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* 进行MD5加密
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*
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* @param qs
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* @param time
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* @param salt
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* @return
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*/
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public static String getSign(String qs, long time, String salt) {
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try {
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return getMd5(String.format("%s&time=%d&salt=%s", qs, time, salt));
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 功能：将一个Map按照Key字母升序构成一个QueryString. 并且加入时间混淆的hash串
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*
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* @param queryMap query内容
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* @param time 加密时候，为当前时间；解密时，为从querystring得到的时间；
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* @param salt 加密salt
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* @return
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*/
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public static String createHashedQueryString(Map<String, String> queryMap, long time, String salt) {
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Map<String, String> map = new TreeMap<String, String>(queryMap);
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//生成queryString方法可自己编写
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String qs = createQueryString(map);
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if (qs == null) {
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return null;
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}
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time = time / 1000;
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String hash = getSign(qs, time, salt).toUpperCase();
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String thqs = String.format("%s&time=%d&hash=%s", qs, time, hash);
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return thqs;
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}
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// public static void main(String[] args) {
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// // 需要传递的参数
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// Map<String, String> params = new HashMap<String, String>();
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// params.put("userid", "A00000000001");
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// params.put("name", "测试直播");
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// params.put("desc", "每晚八点");
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// params.put("authtype", "1");
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// params.put("publisherpass", "admin123");
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// params.put("assistantpass", "admin123");
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// params.put("templatetype", "5");
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// params.put("playpass", "admin123");
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// params.put("livestarttime", "2020-03-05 20:00:00");
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//
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// //秘钥
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// String salt = "LASD8SD8SDN23K";
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// //当前时间戳
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// long time = System.currentTimeMillis();
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// //生成http请求参数
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// String str = createHashedQueryString(params, time, salt);
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// System.out.println("加密后的字符串:" + str);
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// }
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}
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