QQ音乐API加密参数分析

• 1、背景
• 2、QQ音乐sign计算
• 3、Java代码实现
• 4、总结

1、背景

不知道什么时候开始，各家音乐APP都开始对API进行加密，最近一段时间对六大音乐平台的加密算法进行了研究，逆向了网页端、安卓端等等，已经掌握了各家的加密算法。

平台

加密算法

非加密接口

专属资源

海外IP支持

QQ

MD5

存在，可完全替代加密接口

需要绿钻Cookie

不支持，需要国内IP代理

KW

DES

存在，可完全替代加密接口

不需要额外信息

支持

KG

MD5

存在，不能完全替代加密接口

需要豪华会员Cookie

不支持，需要国内IP代理

WY

AES、RSA、MD5

存在，少数接口不能使用未加密接口，如登录

需要黑胶Cookie

不支持，但可通过设置X-Real-IP规避

MG

MD5

存在，可完全替代加密接口

不需要额外信息

支持

XM

私有加密

存在，可完全替代加密接口

不需要额外信息

不支持，需要国内IP代理

2、QQ音乐sign计算

首先说明，所有加密接口都有非加密的替代接口，但是以后肯定是向加密接口发展，两个最基础的API是

https://u.y.qq.com/cgi-bin/musicu.fcg  支持加密和非加密

https://u.y.qq.com/cgi-bin/musics.fcg 仅支持加密

以上说多了，这篇主要是讲如何计算最新版的QQ音乐加密参数。

首先打开QQ音乐官网，F12打开开发者工具，我们随便找一条加密的链接

如图所示，我们可以看到这样一条链接

https://u.y.qq.com/cgi-bin/musics.fcg?-=getUCGI6892186109455234&g_tk=680034686&sign=zzadg51jzc4krod4v97bc3696a5f2740962d1e6c467957c88&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0&data=%7B%22detail%22%3A%7B%22module%22%3A%22musicToplist.ToplistInfoServer%22%2C%22method%22%3A%22GetDetail%22%2C%22param%22%3A%7B%22topId%22%3A4%2C%22offset%22%3A0%2C%22num%22%3A20%2C%22period%22%3A%222020-12-21%22%7D%7D%2C%22comm%22%3A%7B%22ct%22%3A24%2C%22cv%22%3A0%7D%7D

在链接中有个参数,我们的目标就是得到这个参数如何计算的方式

sign=zzadg51jzc4krod4v97bc3696a5f2740962d1e6c467957c88

点Initiator，找一下请求来源，点击来源的JS

在打开的JS里面查找sign找到如下图所示的区域，sign就是在这里得到的（格式化下js代码，否则看不清楚流程）在图中位置下断点，再刷新页面

https://y.gtimg.cn/music/portal/js/common/pkg/common_d9439fa.js?max_age=31536000:formatted

然后断在了这个地方，如果不是加密链接就放过，如果是，就步入

可以把鼠标放在变量上或者再控制台打印变量数据,如下图所示，我将请求的URL和请求参数打印了出来

//u.y.qq.com/cgi-bin/musicu.fcg?-=getUCGI4444074835099534&g_tk=680034686


{
   
   "detail":{
   
   "module":"musicToplist.ToplistInfoServer","method":"GetDetail","param":{
   
   "topId":4,"offset":0,"num":20,"period":"2020-12-21"}},"comm":{
   
   "ct":24,"cv":0}}

sign就是对请求参数加密之后得到的。

继续步入后，我们跳转到了下面这个JS里面，请求参数就是在这里加密的

https://y.qq.com/component/m/qmfe-security-sign/index.umd.js?max_age=2592000:formatted

具体的内容

!function(n, t) {
   
   
    "object" == typeof exports && "undefined" != typeof module ? module.exports = t() : "function" == typeof define && define.amd ? define(t) : (n = n || self).getSecuritySign = t()
}(this, function() {
   
   
    "use strict";
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        if ("undefined" != typeof self)
            return self;
        if ("undefined" != typeof window)
            return window;
        if ("undefined" != typeof global)
            return global;
        throw new Error("unable to locate global object")
    }();
    n.__sign_hash_20200305 = function(n) {
   
   
        function l(n, t) {
   
   
            var o = (65535 & n) + (65535 & t);
            return (n >> 16) + (t >> 16) + (o >> 16) << 16 | 65535 & o
        }
        function r(n, t, o, e, u, p) {
   
   
            return l((i = l(l(t, n), l(e, p))) << (r = u) | i >>> 32 - r, o);
            var i, r
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        function g(n, t, o, e, u, p, i) {
   
   
            return r(t & o | ~t & e, n, t, u, p, i)
        }
        function a(n, t, o, e, u, p, i) {
   
   
            return r(t & e | o & ~e, n, t, u, p, i)
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        function s(n, t, o, e, u, p, i) {
   
   
            return r(t ^ o ^ e, n, t, u, p, i)
        }
        function v(n, t, o, e, u, p, i) {
   
   
            return r(o ^ (t | ~e), n, t, u, p, i)
        }
        function t(n) {
   
   
            return function(n) {
   
   
                var t, o = "";
                for (t = 0; t < 32 * n.length; t += 8)
                    o += String.fromCharCode(n[t >> 5] >>> t % 32 & 255);
                return o
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                n[t >> 5] |= 128 << t % 32,
                n[14 + (t + 64 >>> 9 << 4)] = t;
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                    h = g(h, c, r, f, n[o + 2], 17, 606105819),
                    f = g(f, h, c, r, n[o + 3], 22, -1044525330),
                    r = g(r, f, h, c, n[o + 4], 7, -176418897),
                    c = g(c, r, f, h, n[o + 5], 12, 1200080426),
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                e[2] && (g[e[2]][0] = o)
            }
    }(120731, 0, [21, 34, 50, 100, 57, 50, 102, 50, 98, 99, 101, 52, 54, 97, 52, 99, 55, 56, 52, 49, 57, 54, 57, 49, 56, 98, 102, 100, 100, 48, 48, 55, 55, 102, 2, 10, 3, 2, 9, 48, 61, 3, 9, 48, 61, 4, 9, 48, 61, 5, 9, 48, 61, 6, 9, 48, 61, 7, 9, 48, 61, 8, 9, 48, 61, 9, 9, 48, 4, 21, 427, 54, 2, 15, 3, 2, 9, 48, 61, 3, 9, 48, 61, 4, 9, 48, 61, 5, 9, 48, 61, 6, 9, 48, 61, 7, 9, 48, 61, 8, 9, 48, 61, 9, 9, 48, 61, 10, 9, 48, 61, 11, 9, 48, 61, 12, 9, 48, 61, 13, 9, 48, 61, 14, 9, 48, 61, 10, 9, 55, 54, 97, 54, 98, 54, 99, 54, 100, 54, 101, 54, 102, 54, 103, 54, 104, 54, 105, 54, 106, 54, 107, 54, 108, 54, 109, 54, 110, 54, 111, 54, 112, 54, 113, 54, 114, 54, 115, 54, 116, 54, 117, 54, 118, 54, 119, 54, 120, 54, 121, 54, 122, 54, 48, 54, 49, 54, 50, 54, 51, 54, 52, 54, 53, 54, 54, 54, 55, 54, 56, 54, 57, 13, 4, 61, 11, 9, 55, 54, 77, 54, 97, 54, 116, 54, 104, 8, 55, 54, 102, 54, 108, 54, 111, 54, 111, 54, 114, 14, 55, 54, 77, 54, 97, 54, 116, 54, 104, 8, 55, 54, 114, 54, 97, 54, 110, 54, 100, 54, 111, 54, 109, 14, 25, 0, 3, 4, 9, 11, 3, 3, 9, 11, 39, 3, 1, 38, 40, 3, 3, 9, 11, 38, 25, 1, 13, 4, 61, 12, 9, 55, 13, 4, 61, 13, 9, 3, 0, 13, 4, 4, 3, 13, 9, 11, 3, 11, 9, 11, 66, 22, 306, 4, 21, 422, 24, 4, 3, 14, 9, 55, 54, 77, 54, 97, 54, 116, 54, 104, 8, 55, 54, 102, 54, 108, 54, 111, 54, 111, 54, 114, 14, 55, 54, 77, 54, 97, 54, 116, 54, 104, 8, 55, 54, 114, 54, 97, 54, 110, 54, 100, 54, 111, 54, 109, 14, 25, 0, 3, 10, 9, 55, 54, 108, 54, 101, 54, 110, 54, 103, 54, 116, 54, 104, 15, 10, 40, 25, 1, 13, 4, 61, 12, 9, 6, 11, 3, 10, 9, 3, 14, 9, 11, 15, 10, 38, 13, 4, 61, 13, 9, 6, 11, 6, 5, 1, 5, 0, 3, 1, 38, 13, 4, 61, 0, 5, 0, 43, 4, 21, 291, 61, 3, 12, 9, 11, 0, 3, 9, 9, 49, 72, 0, 2, 3, 4, 13, 4, 61, 8, 9, 21, 721, 3, 2, 8, 3, 2, 9, 48, 61, 3, 9, 48, 61, 4, 9, 48, 61, 5, 9, 48, 61, 6, 9, 48, 61, 7, 9, 48, 4, 55, 54, 115, 54, 101, 54, 108, 54, 102, 8, 10, 30, 55, 54, 117, 54, 110, 54, 100, 54, 101, 54, 102, 54, 105, 54, 110, 54, 101, 54, 100, 32, 28, 22, 510, 4, 21, 523, 22, 4, 55, 54, 115, 54, 101, 54, 108, 54, 102, 8, 10, 0, 55, 54, 119, 54, 105, 54, 110, 54, 100, 54, 111, 54, 119, 8, 10, 30, 55, 54, 117, 54, 110, 54, 100, 54, 101, 54, 102, 54, 105, 54, 110, 54, 101, 54, 100, 32, 28, 22, 566, 4, 21, 583, 3, 4, 55, 54, 119, 54, 105, 54, 110, 54, 100, 54, 111, 54, 119, 8, 10, 0, 55, 54, 103, 54, 108, 54, 111, 54, 98, 54, 97, 54, 108, 8, 10, 30, 55, 54, 117, 54, 110, 54, 100, 54, 101, 54, 102, 54, 105, 54, 110, 54, 101, 54, 100, 32, 28, 22, 626, 4, 21, 643, 25, 4, 55, 54, 103, 54, 108, 54, 111, 54, 98, 54, 97, 54, 108, 8, 10, 0, 55, 54, 69, 54, 114, 54, 114, 54, 111, 54, 114, 8, 55, 54, 117, 54, 110, 54, 97, 54, 98, 54, 108, 54, 101, 54, 32, 54, 116, 54, 111, 54, 32, 54, 108, 54, 111, 54, 99, 54, 97, 54, 116, 54, 101, 54, 32, 54, 103, 54, 108, 54, 111, 54, 98, 54, 97, 54, 108, 54, 32, 54, 111, 54, 98, 54, 106, 54, 101, 54, 99, 54, 116, 27, 1, 23, 56, 0, 49, 444, 0, 0, 24, 0, 13, 4, 61, 8, 9, 55, 54, 95, 54, 95, 54, 103, 54, 101, 54, 116, 54, 83, 54, 101, 54, 99, 54, 117, 54, 114, 54, 105, 54, 116, 54, 121, 54, 83, 54, 105, 54, 103, 54, 110, 15, 21, 1126, 49, 2, 14, 3, 2, 9, 48, 61, 3, 9, 48, 61, 4, 9, 48, 61, 5, 9, 48, 61, 6, 9, 48, 61, 7, 9, 48, 61, 8, 9, 48, 61, 9, 9, 48, 61, 10, 9, 48, 61, 11, 9, 48, 61, 9, 9, 55, 54, 108, 54, 111, 54, 99, 54, 97, 54, 116, 54, 105, 54, 111, 54, 110, 8, 10, 30, 55, 54, 117, 54, 110, 54, 100, 54, 101, 54, 102, 54, 105, 54, 110, 54, 101, 54, 100, 32, 28, 22, 862, 21, 932, 21, 4, 55, 54, 108, 54, 111, 54, 99, 54, 97, 54, 116, 54, 105, 54, 111, 54, 110, 8, 55, 54, 104, 54, 111, 54, 115, 54, 116, 14, 55, 54, 105, 54, 110, 54, 100, 54, 101, 54, 120, 54, 79, 54, 102, 14, 55, 54, 121, 54, 46, 54, 113, 54, 113, 54, 46, 54, 99, 54, 111, 54, 109, 25, 1, 3, 0, 3, 1, 39, 32, 22, 963, 4, 55, 54, 67, 54, 74, 54, 66, 54, 80, 54, 65, 54, 67, 54, 114, 54, 82, 54, 117, 54, 78, 54, 121, 54, 55, 21, 974, 50, 4, 3, 12, 9, 11, 3, 8, 3, 10, 24, 2, 13, 4, 61, 10, 9, 3, 13, 9, 55, 54, 95, 54, 95, 54, 115, 54, 105, 54, 103, 54, 110, 54, 95, 54, 104, 54, 97, 54, 115, 54, 104, 54, 95, 54, 50, 54, 48, 54, 50, 54, 48, 54, 48, 54, 51, 54, 48, 54, 53, 15, 10, 22, 1030, 21, 1087, 22, 4, 3, 13, 9, 55, 54, 95, 54, 95, 54, 115, 54, 105, 54, 103, 54, 110, 54, 95, 54, 104, 54, 97, 54, 115, 54, 104, 54, 95, 54, 50, 54, 48, 54, 50, 54, 48, 54, 48, 54, 51, 54, 48, 54, 53, 15, 3, 9, 9, 11, 3, 3, 9, 11, 38, 25, 1, 13, 4, 61, 11, 9, 3, 12, 9, 11, 3, 10, 3, 53, 3, 37, 39, 24, 2, 13, 4, 4, 55, 54, 122, 54, 122, 54, 97, 3, 11, 9, 11, 38, 3, 10, 9, 11, 38, 0, 49, 771, 2, 1, 12, 9, 13, 8, 3, 12, 4, 4, 56, 0], n);
    var t = n.__getSecuritySign;
    return delete n.__getSecuritySign,
    t
});

然后在进入函数的返回出下断点，断在如下位置后，在控制台执行

r(f, e, c, l, t)

然后打印参数t,我们可以看到参数t里面出现了几个很特别的参数

CJBPACrRuNy7

97bc3696a5f2740962d1e6c467957c88

{
   
   "detail":{
   
   "module":"musicToplist.ToplistInfoServer","method":"GetDetail","param":{
   
   "topId":4,"offset":0,"num":20,"period":"2020-12-21"}},"comm":{
   
   "ct":24,"cv":0}}

看到97bc3696a5f2740962d1e6c467957c88 这样的数字，又是32位，可以大胆地猜测是md5，事实上，97bc3696a5f2740962d1e6c467957c88就是 把固定的字符串CJBPACrRuNy7与请求参数拼接起来之后的md5值

CJBPACrRuNy7{
   
   "detail":{
   
   "module":"musicToplist.ToplistInfoServer","method":"GetDetail","param":{
   
   "topId":4,"offset":0,"num":20,"period":"2020-12-21"}},"comm":{
   
   "ct":24,"cv":0}}

这个JS文件的作用就是用JS实现了一段MD5加密算法。

多次探索之后，我发现sign由以下规则生成

固定头zza+一段随机的小写字符串，由小写字母和数字组成，长度为10-16位+对固定字符串和请求参数取md5。这三部分拼接而成。

下面回到我们调试的地方，取消所有断电，放开运行，之后我们就得到了一个网址

https://u.y.qq.com/cgi-bin/musics.fcg?-=getUCGI5601160880585316&g_tk=680034686&sign=zza4bb58zhof1tkhk8t97bc3696a5f2740962d1e6c467957c88&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0&data=%7B%22detail%22%3A%7B%22module%22%3A%22musicToplist.ToplistInfoServer%22%2C%22method%22%3A%22GetDetail%22%2C%22param%22%3A%7B%22topId%22%3A4%2C%22offset%22%3A0%2C%22num%22%3A20%2C%22period%22%3A%222020-12-21%22%7D%7D%2C%22comm%22%3A%7B%22ct%22%3A24%2C%22cv%22%3A0%7D%7D

计算出了sign后面就可以正常请求了。

3、Java代码实现

附上一段无名音乐中计算sign的代码，用Java实现

public class QqEncrypt {
   
   
    private static final String encNonce="CJBPACrRuNy7";
    private static final String signPrxfix="zza";
    private static final char[] dir="0234567890abcdefghijklmnopqrstuvwxyz".toCharArray();
    /**
     *
     *@param encParams 需要加密的参数，这是一段请求体数据，为json字符串格式，例如下面的格式，可以抓包获取
     *                 {"comm":{"ct":24,"cv":0},"vip":{"module":"userInfo…baseinfo_v2","param":{"vec_uin":["3011429848"]}}}
     *
     * @return 加密的方式为固定字串 zza加上一个10-16位的随机字符串再加上 固定字串 CJBPACrRuNy7加上请求数据拼接的 MD5值
     */
    public static String getSign(String encParams){
   
   
        return signPrxfix+uuidGenerate()+ Md5Encrypt.convertToMd5(encNonce+encParams);
    }

    private static String uuidGenerate(){
   
   
        int minLen=10;
        int maxLen=16;
        Random ran=new Random(System.currentTimeMillis());
        int ranLen=ran.nextInt(maxLen-minLen)+minLen;
        StringBuilder sb=new StringBuilder(ranLen);
        for (int i=0;i<ranLen;i++){
   
   
            sb.append(dir[ran.nextInt(dir.length)]);
        }
        return sb.toString();
    }
}

public class Md5Encrypt {
   
   
    //必须要重视编码问题了！折腾了好多天才发现MD5要用UTF-8形式加密
    public static String convertToMd5(String plainText) {
   
   
        byte[] secretBytes = null;
        try {
   
   
            secretBytes = MessageDigest.getInstance("md5").digest(plainText.getBytes("utf-8"));
        } catch (Exception e) {
   
   
            throw new RuntimeException("没有这个md5算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);
        for (int i = 0; i < 32 - md5code.length(); i++) {
   
   
            md5code = "0" + md5code;
        }
        return md5code;
    }
}

下面是封装了一段请求代码

public class RequestModule {
   
   
    /**
     * musicu支持加密请求和不加密请求，没有对请求进行限制
     * musics仅支持加密请求
     */
    private static final String[] apiServer={
   
   "https://u.y.qq.com/cgi-bin/musicu.fcg?","https://u.y.qq.com/cgi-bin/musics.fcg?"};
    private static final Map<String,String> headerMap=new HashMap<>();

    static {
   
   
        headerMap.put("user-agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 Edg/87.0.664.66");
        headerMap.put("accept-encoding","application/json");
        headerMap.put("cache-control","max-age=0");
    }

    /**
     * 请求示例：{"area":-100,"sex":-100,"genre":-100,"index":15,"sin":0,"cur_page":1}
     * @param area 地区 -100 不限
     * @param genre 流派 全部：-100，流行：1 ，摇滚：2，民谣：3，电子：4，爵士：5，嘻哈：6 .....
     * @param index 索引 热门:-100  范围 0-26 对应歌手名称拼音A-Z开头
     * @param sex 性别 不限：-100  男：0 女：1 组合：2
     * @param sin 偏移(第sin位)
     * @param currPage 当前页，第n页，默认每页最多80人
     * @return
     */
    public static String getSingerList(int area,int genre,int index,int sex,int sin,int currPage){
   
   
        RequestTemplate template=new RequestTemplate("Music.SingerListServer","get_singer_list","{\"area\":"+area+",\"sex\":"+sex+",\"genre\":"+genre+",\"index\":"+index+",\"sin\":"+sin+",\"cur_page\":"+currPage+"}");
        RequestTemplateBuilder templateBuilder=new RequestTemplateBuilder();
        templateBuilder.add("singerList",template);
        String sign= QqEncrypt.getSign(templateBuilder.toString());
        Random ran=new Random(System.currentTimeMillis());
        return HttpRequestHelper.downloadWebSiteUsePost(apiServer[ran.nextInt(apiServer.length)]+"sign="+sign,templateBuilder.toString(),headerMap);
    }

    public static String getHotSingerList(){
   
   
        return getSingerList(-100,-100,-100,-100,0,1);
    }

    /**
     *
     * @param songId 统一规范，指的是songmid
     * @return
     */
    public static String getSongDetail(String songId){
   
   
        //{"songinfo":{"module":"music.pf_song_detail_svr","method":"get_song_detail","param":{"song_mid":"112344"}}}
        RequestTemplate template=new RequestTemplate("music.pf_song_detail_svr","get_song_detail","{\"song_mid\":\""+songId+"\"}");
        RequestTemplateBuilder templateBuilder=new RequestTemplateBuilder();
        templateBuilder.add("songdetail",template);
        String sign= QqEncrypt.getSign(templateBuilder.toString());
        Random ran=new Random(System.currentTimeMillis());
        return HttpRequestHelper.downloadWebSiteUsePost(apiServer[ran.nextInt(apiServer.length)] +"sign="+sign,templateBuilder.toString(),headerMap);
    }

}

实体类

public class RequestTemplate{
   
   
    public String module="";
    public String method="";
    public Object param=new Object();

    public RequestTemplate() {
   
   
    }

    public RequestTemplate(String module, String method, Object param) {
   
   
        this.module = module;
        this.method = method;
        this.param = param;
    }

    public String getModule() {
   
   
        return module;
    }

    public void setModule(String module) {
   
   
        this.module = module;
    }

    public String getMethod() {
   
   
        return method;
    }

    public void setMethod(String method) {
   
   
        this.method = method;
    }

    public Object getParam() {
   
   
        return param;
    }

    public void setParam(Object param) {
   
   
        this.param = param;
    }

    @Override
    public String toString() {
   
   
        return "{" +
                "\"module\":\"" + module + "\"" +
                ",\"method\":\"" + method + "\"" +
                ",\"param\":" + param.toString()  +
                "}";
    }
}

/**
 * 构造请求结构，所有请求都可以是这样的
 *
 * {
 *     "comm": {
 *         "ct": 24,
 *         "cv": 0
 *     },
 *     "singerList": {
 *         "module": "Music.SingerListServer",
 *         "method": "get_singer_list",
 *         "param": {
 *             "area": -100,
 *             "sex": -100,
 *             "genre": -100,
 *             "index": -100,
 *             "sin": 0,
 *             "cur_page": 1
 *         }
 *     }
 * }
 */
public class RequestTemplateBuilder {
   
   
    private Map<String,Object> requestTemplateMap=new HashMap<>();
    public RequestTemplateBuilder add(String name, Object req){
   
   
        requestTemplateMap.put(name,req);
        return this;
    }
    @Override
    public String toString() {
   
   
        StringBuilder sb=new StringBuilder();
        for (String key: requestTemplateMap.keySet()){
   
   
            sb.append("\"").append(key).append("\":").append(requestTemplateMap.get(key).toString()).append(",");
        }
        sb.substring(0,sb.length()-1);
        return "{"+sb.substring(0,sb.length()-1)+"}";
    }
}

4、总结

核心的加密函数在以下JS文件中实现，这段JS主要就是实现了MD5算法，由于以前没接触过如何实现MD5算法，在分析这段代码上还是遇到了很大困难的，不过我们在实现过程中完全不必自己实现MD5加密算法，我们可以直接使用各个语言上的加密库实现MD5加密。

https://y.qq.com/component/m/qmfe-security-sign/index.umd.js?max_age=2592000:formatted