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| package main
import (
"crypto/hmac"
"crypto/sha1"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"hash"
"io"
"net"
"net/http"
"strconv"
"strings"
"time"
)
const (
localTokenUrl = "/local-ssh/api?method=get"
routerInfoUrl = "/cgi-bin/turbo/proxy/router_info"
localSshUrl = "/local-ssh/api?method=valid&data=%s"
)
const (
retry = 10
sleepSecond = 10 * time.Second
)
type LocalTokenResp struct {
Data string
}
type LocalSshResp struct {
Data string
}
type RouterInfoResp struct {
Data RouterInfoData
}
type RouterInfoData struct {
Uuid string
}
var ErrorSystemBusy = errors.New("系统忙，请稍后重试")
var address = "192.168.199.1"
func main() {
var input string
var n int
var ip net.IP
var err error
for {
fmtPrint("请输入极路由管理IP，然后按回车继续(不输入则默认192.168.199.1): ")
n, err = fmt.Scanln(&input)
if err != nil && err.Error() != "unexpected newline" {
fmtPrintFln("输入有误，请重新输入: %v", err)
continue
}
if n == 0 {
input = address
}
ip = net.ParseIP(input)
if ip == nil {
fmtPrintFln("输入非合法IP，请重新输入")
continue
}
address = ip.String()
fmtPrintFln("极路由IP为: %s", address)
break
}
launchSsh()
fmtPrint("按回车退出...")
_, _ = fmt.Scanln(&input)
}
func launchSsh() {
var localToken string
var uuid string
var cloudToken string
var port string
var err error
for i := 0; i <= retry; i++ {
if i != 0 {
time.Sleep(sleepSecond)
fmtPrintFln("----------------------------------------------------------------")
fmtPrintFln("第%d次重试", i)
}
fmtPrintFln("开始获取UUID")
uuid, err = getUUID()
if err != nil {
fmtPrintFln("获取uuid出错: %v", err)
continue
}
fmtPrintFln("获取uuid成功: %s ", uuid)
fmtPrintFln("开始获取local_token")
localToken, err = getLocalToken()
if err != nil {
fmtPrintFln("获取local_token出错: %v", err)
continue
}
fmtPrintFln("获取local_token成功: %s", localToken)
fmtPrintFln("开始生成cloud_token")
cloudToken, err = getCloudToken(uuid, localToken)
if err != nil {
fmtPrintFln("生成cloud_token出错: %v", err)
continue
}
fmtPrintFln("生成cloud_token成功: %s", cloudToken)
fmtPrintFln("开始获取local_ssh")
port, err = getLocalSsh(cloudToken)
if err != nil {
fmtPrintFln("获取local_ssh出错: %v", err)
continue
}
fmtPrintFln("获取local_ssh成功，端口号: %s，有效期5分钟，请及时更改为永久ssh", port)
return
}
fmtPrintFln("获取local_ssh出错，请检查IP是否有误，UUID，LocalToken是否正常获取")
fmtPrintFln("极路由IP为: %s", address)
fmtPrintFln("UUID为: %s", uuid)
fmtPrintFln("LocalToken为: %s", localToken)
fmtPrintFln("CloudToken为: %s", cloudToken)
}
func getLocalSsh(cloudToken string) (port string, err error) {
var osr *LocalSshResp
osr = &LocalSshResp{}
err = httpGet(generateUrl(localSshUrl, cloudToken), osr)
if err != nil {
return
}
if !strings.Contains(osr.Data, "Success: ssh port is ") {
err = errors.New(fmt.Sprint("Unknown error:", osr.Data))
}
port = strings.ReplaceAll(osr.Data, "Success: ssh port is ", "")
return
}
func getUUID() (uuid string, err error) {
var rir *RouterInfoResp
rir = &RouterInfoResp{}
err = httpGet(generateUrl(routerInfoUrl), rir)
if err != nil {
return
}
uuid = rir.Data.Uuid
return
}
func getLocalToken() (localToken string, err error) {
var ltr *LocalTokenResp
ltr = &LocalTokenResp{}
err = httpGet(generateUrl(localTokenUrl), ltr)
if err != nil {
return
}
localToken = ltr.Data
return
}
func getCloudToken(uuid, localToken string) (cloudToken string, err error) {
var key [sha1.Size]byte
var msg []byte
var expectedMAC []byte
msg, err = tokenToMsg(localToken)
if err != nil {
return
}
key = sha1Sum(uuid)
expectedMAC = hmacSha1Sum(msg, key[:])
cloudToken = base64.StdEncoding.EncodeToString(expectedMAC)
return
}
func httpGet(url string, data interface{}) (err error) {
var resp *http.Response
var body []byte
url = strings.ReplaceAll(url, "+", "%2B")
resp, err = http.Get(url)
if err != nil {
return
}
body, err = io.ReadAll(resp.Body)
if err != nil {
return
}
if strings.Contains(string(body), "系统忙，请稍后重试") {
err = ErrorSystemBusy
return
}
err = json.Unmarshal(body, data)
if err != nil {
fmtPrintFln("json Unmarshal error: %s", string(body))
return
}
return
}
func generateUrl(api string, a ...any) (url string) {
api = fmt.Sprintf(api, a...)
url = "http://" + address + api
return
}
func tokenToMsg(localToken string) (msg []byte, err error) {
var decodedLocalToken []byte
var splitToken []string
var timestamp int
var msgStr string
decodedLocalToken, err = base64.StdEncoding.DecodeString(localToken)
if err != nil {
return
}
splitToken = strings.Split(string(decodedLocalToken), ",")
timestamp, err = strconv.Atoi(splitToken[2])
if err != nil {
return
}
timestamp += 1
splitToken[2] = strconv.Itoa(timestamp)
msgStr = strings.Join(splitToken[:3], ",")
msg = []byte(msgStr)
return
}
func sha1Sum(uuid string) (checksum [sha1.Size]byte) {
var data []byte
data = []byte(uuid)
checksum = sha1.Sum(data)
return
}
func hmacSha1Sum(msg, key []byte) (expectedMAC []byte) {
var mac hash.Hash
mac = hmac.New(sha1.New, key)
mac.Write(msg)
expectedMAC = mac.Sum(nil)
return
}
func fmtPrintFln(format string, a ...any) {
fmt.Printf(format, a...)
fmt.Println()
}
func fmtPrint(a ...any) {
fmt.Print(a...)
}
|
