修复kw

lib/api/kuwo/kuwo.dart

@@ -34,6 +34,7 @@ class KuWo {
 
   ///Banner
   static Future<Answer> banner() {
+
     return _banner.call({}, []);
   }
 
@@ -237,14 +238,17 @@ final _api = <String, Api>{
 //请求
 Future<Answer> _get(String path, {Map<String, dynamic>? params, List<Cookie> cookie = const []}) async {
   var hm_token = getRandom(32);
-  var token_sha1=sha1.convert(utf8.encode(hm_token)).toString();
+  var hm_Iuvt = getRandom(32);
+  var key="Hm_Iuvt_cdb524f42f0ce19b169b8072123a4727";
+
+  var token_sha1 = sha1.convert(utf8.encode(hm_token)).toString();
   Map<String, String> header = {
     // "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.55 Safari/537.36 Edg/96.0.1054.43",
     "csrf": "SQ6EJ3Q5G6B",
     "Token": "7865309485D199575C04186AFF58C46D",
-    "Secret":"3d12021f8dfdbc44df42bf3a92d1cb890fc1babcd39e0fc020487fb7ecfb520e0443ee85",
-    "cookie": "Hm_token=$hm_token;kw_token=${getRandom(11)};Hm_Iuvt_cdb524f42f0ce19b169b8072123a4727=cNxswyQMayRz67Rt2tC4ns3KX4sfHBE5",
+    "cookie": "Hm_token=$hm_token;kw_token=${getRandom(11)};$key=$hm_Iuvt",
     "Cross": md5.convert(utf8.encode(token_sha1)).toString(),
+    "Secret": KuwoDES.secret(key, hm_Iuvt),
     "Referer": "http://www.kuwo.cn/",
   };
 

lib/api/kuwo/kuwoDES.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:math';
 
 class KuwoDES {
   static List<int> SECRET_KEY = utf8.encode("ylzsxkwm");
@@ -1193,7 +1194,8 @@ class KuwoDES {
     // System.arraycopy(src, num * 8, szTail, 0, srcLength - num * 8);
 
     int tail64 = 0;
-    for (int i = 0; i < tail_num; i++) tail64 = tail64 | ((szTail[i] & 0xff)) << (i * 8);
+    for (int i = 0; i < tail_num; i++)
+      tail64 = tail64 | ((szTail[i] & 0xff)) << (i * 8);
 
     pEncyrpt[num] = DES64(subKey, tail64);
 
@@ -1211,4 +1213,34 @@ class KuwoDES {
     //return new String(Base64Coder.encode(result, result.length, null));
     return result;
   }
+
+  //请求头Hm_Iuvt_cdb524f42f0ce19b169b8072123a4727，Secret算法
+  static String secret(String name, String token) {
+    var n = name.codeUnits.map((e) => e.toString()).join();
+    var r = (n.length / 5).floor();
+    var o = int.parse(n[r] + n[2 * r] + n[3 * r] + n[4 * r] + n[5 * r]);
+    var l = (name.length / 2.0).ceil();
+    var c = pow(2, 31) - 1;
+    var d = ((1e9 * Random().nextDouble()).round() % 1e8).toInt();
+    n = "$n$d";
+    while (n.length > 10) {
+      var a1 = n.substring(0, 10);
+      var a2 = n.substring(10, n.length);
+      if (a2.contains("e+")) {
+        n = (double.parse(a1).toInt() + double.parse(a2.replaceAll("e+", ".")).toInt()).toString();
+      } else {
+        n = (double.parse(a1) + double.parse(a2)).toString();
+      }
+    }
+    n = ((o * double.parse(n) + l) % c).toString();
+
+    var f = token.codeUnits.map((e) {
+      var h = e ^ (double.parse(n) / c * 255).floor();
+      n = ((o * double.parse(n) + l) % c).toString();
+      return h.toRadixString(16).padLeft(2, '0');
+    }).join();
+
+    var dd = d.toRadixString(16).padLeft(8, '0');
+    return f + dd;
+  }
 }

lib/api/kuwo/请求头算法

@@ -0,0 +1,53 @@
+```kotlin
+fun main() {
+    //t是随机的32位字符串
+    val t = "6Q5tPYAYEdQSz888887jh5FTKaMRXwdx"
+    //e是固定的Cookie名称
+    val e = "Hm_Iuvt_cdb524f42f0ce19b169b8072123a4727"
+    //n是e的ASCII码拼接
+    var n = e.toCharArray().joinToString("") { it.code.toString() }
+    println(n)
+    val r = floor(n.length / 5.0).toInt()
+    println("r=$r")
+    val o = (n[r].toString() + n[2 * r] + n[3 * r] + n[4 * r] + n[5 * r]).toInt()
+    println("o=$o")
+    val l = ceil(e.length / 2.0).toInt()
+    println("l=$l")
+    val c = (2.0.pow(31.0) - 1).toInt()
+    println("c=$c")
+    val d = (Math.round(1e9 * Math.random()) % 1e8).toInt()
+    println("d=$d")
+    n = "$n$d"
+    //===========一个神奇的算法START，后期大概率会改===================================
+    //这是上面计算的n值7210995731171181169599100985350521025250102489910149579849545798564855504950519752555055
+    while (n.length > 10) {
+        val a1 = n.substring(0, 10)
+        val a2 = n.substring(10, n.length)
+        //第一次循环7210995731  17118116959910098535052102525010248991014957984954579856485550495051975255505545084407
+        //第二次循环1.71181169  59910098E85
+        //这里竟然生成了科学计数
+        //js中用了parseInt，但是在kotlin中‘59910098E85’带有字母会报错，这里用了parseDouble，替换了‘E’，实现了和js一样的效果
+        //最后计算出来的值是59910099
+        println("$a1  $a2")
+        n = if (a2.contains("E")) {
+            (parseDouble(a1).toInt() + parseDouble(a2.replace("E", ".")).toInt()).toString()
+        } else {
+            (parseDouble(a1) + parseDouble(a2)).toString()
+        }
+    }
+    //===========一个神奇的算法END===================================
+    println("n=$n")
+    n = ((o * n.toDouble() + l) % c).toString()
+    //由于上面算法科学计数剪切问题，随机数d被剪切丢失，这里n其实是一个固定值798334170
+    //上面算法都是废话
+    val f = t.toCharArray().joinToString("") {
+        val h = it.code xor (floor(n.toDouble() / c * 255)).toInt()
+        n = ((o * n.toDouble() + l) % c).toString()
+        h.toString(16).padStart(2, '0')
+    }
+    println(f)
+    val dd = d.toString(16).padStart(8, '0')
+    //计算出来的Secret
+    println(f + dd)
+}
+```