commit 48f309ece1226ae83d2a8a7219d01cff8314c5e9
Author: Mmx <1624045573@qq.com>
Date:   Sat Mar 13 14:28:00 2021 +0800

    基本复刻完成

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..62c8935
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea/
\ No newline at end of file
diff --git a/Request/request.go b/Request/request.go
new file mode 100644
index 0000000..5a17ac2
--- /dev/null
+++ b/Request/request.go
@@ -0,0 +1,31 @@
+package Request
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+func Get(Url string, Query map[string]string) (string, error) {
+	req, err := http.NewRequest("GET", Url, nil)
+	if err != nil {
+		fmt.Println(err)
+		return "", err
+	}
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.26 Safari/537.36")
+	if Query != nil {
+		q := req.URL.Query()
+		for k, v := range Query {
+			q.Add(k, v)
+		}
+		req.URL.RawQuery = q.Encode()
+	}
+	resp, err := (&http.Client{}).Do(req)
+	if err != nil {
+		fmt.Println(err)
+		return "", err
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	return string(body), err
+}
diff --git a/Util/Xencode.go b/Util/Xencode.go
new file mode 100644
index 0000000..455e52e
--- /dev/null
+++ b/Util/Xencode.go
@@ -0,0 +1,90 @@
+package Util
+
+import (
+	"math"
+)
+
+func ordat(msg string, idx int) byte {
+	if len(msg) > idx {
+		return []byte(msg)[idx]
+	}
+	return byte(0)
+}
+
+func sensCode(content string, key bool) []byte {
+	l := len(content)
+	pwd := make([]byte, 0)
+	for i := 0; i < l; i += 4 {
+		pwd = append(
+			pwd,
+			ordat(content, i)|ordat(content, i+1)<<8|ordat(content, i+2)<<16|ordat(content, i+3)<<24,
+		)
+	}
+	if key {
+		pwd = append(pwd, byte(l))
+	}
+	return pwd
+}
+
+func lenCode(msg []byte, key bool) []byte {
+	l := len(msg)
+	ll := (l - 1) << 2
+	if key {
+		m := int(msg[l-1])
+		if m < ll-3 || m > ll {
+			return nil
+		}
+		ll = m
+	}
+	for i := range msg {
+		msg[i] = byte(int(msg[i])&0xff) + byte(int(msg[i])>>8&0xff) + byte(int(msg[i])>>16&0xff) + byte(int(msg[i])>>24&0xff)
+	}
+	if key {
+		return msg[0:ll]
+	}
+	return msg
+}
+
+func XEncode(content string, key string) []byte {
+	if content == "" {
+		return nil
+	}
+	pwd := sensCode(content, true)
+	pwdk := sensCode(key, false)
+	if len(pwdk) < 4 {
+		for i := 0; i < (4 - len(pwdk)); i++ {
+			pwdk = append(pwdk, byte(0))
+		}
+	}
+	n := len(pwd) - 1
+	z := pwd[n]
+	y := pwd[0]
+	c := 0x86014019 | 0x183639A0
+	m := 0
+	e := 0
+	p := 0
+	q := math.Floor(6 + 52/(float64(n)+1))
+	d := 0
+	for 0 < q {
+		d = d + c&(0x8CE0D9BF|0x731F2640)
+		e = d >> 2 & 3
+		p = 0
+		for p < n {
+			y = pwd[p+1]
+			m = int(z)>>5 ^ int(y)<<2
+			m = m + ((int(y)>>3 ^ int(z)<<4) ^ (d ^ int(y)))
+			m = m + (int(pwdk[(p&3)^e]) ^ int(z))
+			pwd[p] = byte(int(pwd[p]) + m&(0xEFB8D130|0x10472ECF))
+			z = pwd[p]
+			p = p + 1
+		}
+		y = pwd[0]
+		m = int(z)>>5 ^ int(y)<<2
+		m = m + ((int(y)>>3 ^ int(z)<<4) ^ (int(d) ^ int(y)))
+		m = m + (int(pwdk[(p&3)^e]) ^ int(z))
+		pwd[n] = byte(int(pwd[n]) + m&(0xBB390742|0x44C6F8BD))
+		z = pwd[n]
+		q = q - 1
+	}
+	return lenCode(pwd, false)
+}
diff --git a/Util/util.go b/Util/util.go
new file mode 100644
index 0000000..0678e60
--- /dev/null
+++ b/Util/util.go
@@ -0,0 +1,47 @@
+package Util
+
+import (
+	"crypto/md5"
+	"crypto/sha1"
+	"errors"
+	"fmt"
+	"io"
+	"regexp"
+)
+
+func Search(reg string, content string) (string, error) {
+	r := regexp.MustCompile(reg)
+	if r == nil {
+		return "", errors.New("解析正则表达式失败")
+	}
+	if s := r.FindStringSubmatch(content); len(s) < 2 {
+		return "", errors.New("无匹配")
+	} else {
+		return s[1], nil
+	}
+}
+
+func GetIp(body string) (string, error) {
+	return Search("id=\"user_ip\" value=\"(.*?)\"", body)
+}
+
+func GetToken(body string) (string, error) {
+	return Search(body, "\"challenge\":\"(.*?)\"")
+}
+
+func GetResult(body string)(string,error){
+	return Search(body,"\"error_msg\":\"(.+)\"")
+}
+
+func Md5(content string) string {
+	w := md5.New()
+	_, _ = io.WriteString(w, content)    //将str写入到w中
+	return fmt.Sprintf("%x", w.Sum(nil)) //w.Sum(nil)将w的hash转成[]byte格式
+}
+
+func Sha1(content string)string{
+	h := sha1.New()
+	h.Write([]byte(content))
+	bs := h.Sum(nil)
+	return fmt.Sprintf("%x\n", bs)
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..df7e1a8
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module Mmx
+
+go 1.15
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..e6af030
--- /dev/null
+++ b/main.go
@@ -0,0 +1,129 @@
+package main
+
+import (
+	"Mmx/Request"
+	"Mmx/Util"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+type LoginForm struct {
+	UserName string
+	PassWord string
+}
+
+type LoginInfo struct {
+	UrlLoginPage       string
+	UrlGetChallengeApi string
+	UrlLoginApi        string
+	N                  string
+	VType              string
+	Acid               string
+	Enc                string
+
+	Ip              string
+	Token           string
+	EncryptedInfo   string
+	Md5             string
+	EncryptedMd5    string
+	EncryptedChkstr string
+	LoginResult     string
+	Form            *LoginForm
+}
+
+func Generate(Domain string, Username string, Password string) *LoginInfo {
+	return &LoginInfo{
+		UrlLoginPage:       "http://" + Domain + "/srun_portal_success?ac_id=5&theme=basic1",
+		UrlGetChallengeApi: "http://" + Domain + "/cgi-bin/get_challenge",
+		UrlLoginApi:        "http://" + Domain + "/cgi-bin/srun_portal",
+		N:                  "200",
+		VType:              "1",
+		Acid:               "5",
+		Enc:                "srun_bx1",
+		Form: &LoginForm{
+			UserName: Username + "@cmcc",
+			PassWord: Password,
+		},
+	}
+}
+
+func ErrHandler(err error) {
+	if err != nil {
+		defer os.Exit(3)
+		panic(err)
+	}
+}
+
+func main() {
+	G := Generate(
+		"",
+		"",
+		"",
+	)
+	fmt.Println("Step1: Get local ip returned from srun server.")
+	{
+		body, err := Request.Get(G.UrlLoginPage, nil)
+		ErrHandler(err)
+		G.Ip, err = Util.GetIp(body)
+		ErrHandler(err)
+	}
+	fmt.Println("Step2: Get token by resolving challenge result.")
+	{
+		data, err := Request.Get(G.UrlGetChallengeApi, map[string]string{
+			"callback": "jsonp1583251661367",
+			"username": G.Form.UserName,
+			"ip":       G.Ip,
+		})
+		ErrHandler(err)
+		G.Token, err = Util.GetToken(data)
+		ErrHandler(err)
+	}
+	fmt.Println("Step3: Loggin and resolve response.")
+	{
+		info, err := json.Marshal(map[string]string{
+			"username": G.Form.UserName,
+			"password": G.Form.PassWord,
+			"ip":       G.Ip,
+			"acid":     G.Acid,
+			"enc_ver":  G.Enc,
+		})
+		ErrHandler(err)
+		G.EncryptedInfo = "{SRBX1}" + base64.StdEncoding.EncodeToString(Util.XEncode(string(info), G.Token))
+		G.Md5=Util.Md5(G.Token)
+		G.EncryptedMd5 = "{MD5}"+G.Md5
+
+		var chkstr string
+		chkstr = G.Token + G.Form.UserName
+		chkstr += G.Token + G.Md5
+		chkstr += G.Token + G.Acid
+		chkstr += G.Token + G.Ip
+		chkstr += G.Token + G.N
+		chkstr += G.Token + G.VType
+		chkstr += G.Token+ G.EncryptedInfo
+		G.EncryptedChkstr=Util.Sha1(chkstr)
+
+		res,err:=Request.Get(G.UrlLoginApi, map[string]string{
+			"callback": "jQuery1124011576657442209481_1602812074032",
+			"action":"login",
+			"username": G.Form.UserName,
+			"password": G.EncryptedMd5,
+			"ac_id": G.Acid,
+			"ip": G.Ip,
+			"info": G.EncryptedInfo,
+			"chksum": G.EncryptedChkstr,
+			"n": G.N,
+			"type": G.VType,
+			"os": "Windows+10",
+			"name": "windows",
+			"double_stack": "0",
+			"_": "1602812428675",
+		})
+		ErrHandler(err)
+		G.LoginResult,err=Util.GetResult(res)
+		ErrHandler(err)
+	}
+
+	fmt.Println("The loggin result is: " + G.LoginResult)
+}