需引用命名空间：
Microsoft.Vsa
Microsoft.JScript

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using DotNet.Utilities;

using System.Text.RegularExpressions;

using System.Web;

using System.CodeDom.Compiler;

using System.Reflection;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private static readonly CodeDomProvider _provider = new Microsoft.JScript.JScriptCodeProvider();

        private static Type _evaluateType;

        private void button1_Click(object sender, EventArgs e)

        {

            #region MyRegion

            StringBuilder sb = new StringBuilder();

            sb.Append("package aa{ public class JScript {");

            sb.Append("public static function getm32str(str, timesign) {");

            sb.Append("");

            sb.Append("    return hex_md5(hex_md5(str) + timesign);");

            sb.Append("}");

            sb.Append("");

            sb.Append("");

            sb.Append("public static function getm16str(str, timesign) {");

            sb.Append("");

            sb.Append("    return hex_md5(str + timesign);");

            sb.Append("}");

            sb.Append("");

            sb.Append("");

            sb.Append("public static function hex_md5(s) {");

            sb.Append("    return binl2hex(core_md5(str2binl(s), s.length * 8));");

            sb.Append("}");

            sb.Append("");

            sb.Append("public static function str2binl(str) {");

            sb.Append("    var bin = Array();");

            sb.Append("    var mask = (1 << 8) - 1;");

            sb.Append("    for (var i = 0; i < str.length * 8; i += 8) {");

            sb.Append("        bin[i >> 5] |= (str.charCodeAt(i / 8) & mask) << (i % 32);");

            sb.Append("    }");

            sb.Append("    return bin;");

            sb.Append("}");

            sb.Append("");

            sb.Append("public static function md5_cmn(q, a, b, x, s, t) {");

            sb.Append("    return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);");

            sb.Append("}");

            sb.Append("public static function md5_ff(a, b, c, d, x, s, t) {");

            sb.Append("    return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);");

            sb.Append("}");

            sb.Append("public static function md5_gg(a, b, c, d, x, s, t) {");

            sb.Append("    return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);");

            sb.Append("}");

            sb.Append("public static function md5_hh(a, b, c, d, x, s, t) {");

            sb.Append("    return md5_cmn(b ^ c ^ d, a, b, x, s, t)");

            sb.Append("}");

            sb.Append("public static function md5_ii(a, b, c, d, x, s, t) {");

            sb.Append("    return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);");

            sb.Append("}");

            sb.Append("");

            sb.Append("");

            sb.Append("public static function core_md5(x, len) {");

            sb.Append("    x[len >> 5] |= 0x80 << ((len) % 32);");

            sb.Append("    x[(((len + 64) >>> 9) << 4) + 14] = len;");

            sb.Append("    var a = 1732584193;");

            sb.Append("    var b = -271733879;");

            sb.Append("    var c = -1732584194;");

            sb.Append("    var d = 271733878;");

            sb.Append("    for (var i = 0; i < x.length; i += 16) {");

            sb.Append("        var olda = a;");

            sb.Append("        var oldb = b;");

            sb.Append("        var oldc = c;");

            sb.Append("        var oldd = d;");

            sb.Append("        a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);");

            sb.Append("        d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);");

            sb.Append("        c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);");

            sb.Append("        b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);");

            sb.Append("        a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);");

            sb.Append("        d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);");

            sb.Append("        c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);");

            sb.Append("        b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);");

            sb.Append("        a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);");

            sb.Append("        d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);");

            sb.Append("        c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);");

            sb.Append("        b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);");

            sb.Append("        a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);");

            sb.Append("        d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);");

            sb.Append("        c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);");

            sb.Append("        b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);");

            sb.Append("        a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);");

            sb.Append("        d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);");

            sb.Append("        c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);");

            sb.Append("        b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);");

            sb.Append("        a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);");

            sb.Append("        d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);");

            sb.Append("        c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);");

            sb.Append("        b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);");

            sb.Append("        a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);");

            sb.Append("        d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);");

            sb.Append("        c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);");

            sb.Append("        b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);");

            sb.Append("        a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);");

            sb.Append("        d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);");

            sb.Append("        c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);");

            sb.Append("        b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);");

            sb.Append("        a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);");

            sb.Append("        d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);");

            sb.Append("        c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);");

            sb.Append("        b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);");

            sb.Append("        a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);");

            sb.Append("        d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);");

            sb.Append("        c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);");

            sb.Append("        b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);");

            sb.Append("        a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);");

            sb.Append("        d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);");

            sb.Append("        c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);");

            sb.Append("        b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);");

            sb.Append("        a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);");

            sb.Append("        d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);");

            sb.Append("        c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);");

            sb.Append("        b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);");

            sb.Append("        a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);");

            sb.Append("        d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);");

            sb.Append("        c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);");

            sb.Append("        b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);");

            sb.Append("        a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);");

            sb.Append("        d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);");

            sb.Append("        c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);");

            sb.Append("        b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);");

            sb.Append("        a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);");

            sb.Append("        d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);");

            sb.Append("        c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);");

            sb.Append("        b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);");

            sb.Append("        a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);");

            sb.Append("        d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);");

            sb.Append("        c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);");

            sb.Append("        b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);");

            sb.Append("        a = safe_add(a, olda);");

            sb.Append("        b = safe_add(b, oldb);");

            sb.Append("        c = safe_add(c, oldc);");

            sb.Append("        d = safe_add(d, oldd)");

            sb.Append("    }");

            sb.Append("    return Array(a, b, c, d);");

            sb.Append("}");

            sb.Append("");

            sb.Append("public static function bit_rol(num, cnt) {");

            sb.Append("    return (num << cnt) | (num >>> (32 - cnt));");

            sb.Append("}");

            sb.Append("");

            sb.Append("public static function safe_add(x, y) {");

            sb.Append("    var lsw = (x & 0xFFFF) + (y & 0xFFFF);");

            sb.Append("    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);");

            sb.Append("    return (msw << 16) | (lsw & 0xFFFF)");

            sb.Append("}");

            sb.Append("");

            sb.Append("public static function binl2hex(binarray) {");

            sb.Append("var hexcase = 0;");

            sb.Append("");

            sb.Append("    var hex_tab = hexcase ? \"0123456789ABCDEF\" : \"0123456789abcdef\";");

            sb.Append("    var str = \"\";");

            sb.Append("    for (var i = 0; i < binarray.length * 4; i++) {");

            sb.Append("        str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) + hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF)");

            sb.Append("    }");

            sb.Append("    return str;");

            sb.Append("}");

            sb.Append("}}");

            #endregion

            CompilerParameters parameters = new CompilerParameters();

            parameters.GenerateInMemory = true;

            CompilerResults results = _provider.CompileAssemblyFromSource(parameters, sb.ToString());

            Assembly assembly = results.CompiledAssembly;

            string time = "";

            DateTime d1 = DateTime.Now.AddHours((double)(-));

            DateTime d2 = new DateTime(, , );

            long d = (long)d1.Subtract(d2).TotalMilliseconds;

            //得到时间串

            time = d.ToString();

            _evaluateType = assembly.GetType("aa.JScript");

            object[] w = new object[] { textBox2.Text.Trim(), time };

            object ww = _evaluateType.InvokeMember("getm32str", BindingFlags.InvokeMethod,

            null, null, w);

            //得到P1

            string p1 = ww.ToString();

            w = new object[] { textBox2.Text.Trim() };

            ww = _evaluateType.InvokeMember("hex_md5", BindingFlags.InvokeMethod,

           null, null, w);

            string m32 = ww.ToString();

            m32 = m32.Substring(, );

            string result = "";

            for (int i = m32.Length - ; i >= ; i--)

            {

                result += m32.Substring(i, );

            }

            w = new object[] { textBox2.Text.Trim(), time };

            ww = _evaluateType.InvokeMember("getm16str", BindingFlags.InvokeMethod,

           null, null, w);

            //得到P2

            string p2 = ww.ToString();

            HttpItem item = new HttpItem()

            {

                URL = "https://passport.58.com/dounionlogin",

                Encoding = "utf-8",

                Method = "POST",

                Postdata = "isweak=1&path=http%3A%2F%2Fxa.58.com%2F%3Fpts%3D1356513306818&" +

                "p1=" + p1 + "&" +

                "p2=" + p2 + "&" +

                "timesign=" + time + "&ptk=e3741580635e4fd8aab83345a3433853&cd=8739&username=" + textBox1.Text.Trim() + "&password=password"

            };

            HttpHelper http = new HttpHelper();

            string html = http.GetHtml(item);

            if (string.IsNullOrEmpty(item.Cookie))

            {

                //登录失败

                richTextBox1.Text = "登录失败";

            }

            else

            {

                //成功登录

                richTextBox1.Text = "登录成功";

            }

        }

    }

}

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