v2 init commit

src/webssh.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"imuslab.com/zoraxy/mod/sshprox"
+	"imuslab.com/zoraxy/mod/utils"
+)
+
+/*
+	webssh.go
+
+	This script handle the establish of a new ssh proxy object
+*/
+
+func HandleCreateProxySession(w http.ResponseWriter, r *http.Request) {
+	//Get what ip address and port to connect to
+	ipaddr, err := utils.PostPara(r, "ipaddr")
+	if err != nil {
+		http.Error(w, "Invalid Usage", http.StatusInternalServerError)
+		return
+	}
+
+	portString, err := utils.PostPara(r, "port")
+	if err != nil {
+		portString = "22"
+	}
+
+	username, err := utils.PostPara(r, "username")
+	if err != nil {
+		username = ""
+	}
+
+	port, err := strconv.Atoi(portString)
+	if err != nil {
+		utils.SendErrorResponse(w, "invalid port number given")
+		return
+	}
+
+	if !*allowSshLoopback {
+		//Not allow loopback connections
+		if strings.EqualFold(strings.TrimSpace(ipaddr), "localhost") || strings.TrimSpace(ipaddr) == "127.0.0.1" {
+			//Request target is loopback
+			utils.SendErrorResponse(w, "loopback web ssh connection is not enabled on this host")
+			return
+		}
+	}
+
+	//Check if the target is a valid ssh endpoint
+	if !sshprox.IsSSHConnectable(ipaddr, port) {
+		utils.SendErrorResponse(w, ipaddr+":"+strconv.Itoa(port)+" is not a valid SSH server")
+		return
+	}
+
+	//Create a new proxy instance
+	instance, err := webSshManager.NewSSHProxy("./tmp/gotty")
+	if err != nil {
+		utils.SendErrorResponse(w, strings.ReplaceAll(err.Error(), "\\", "/"))
+		return
+	}
+
+	//Create an ssh process to the target address
+	err = instance.CreateNewConnection(webSshManager.GetNextPort(), username, ipaddr, port)
+	if err != nil {
+		utils.SendErrorResponse(w, err.Error())
+		return
+	}
+
+	//Return the instance uuid
+	js, _ := json.Marshal(instance.UUID)
+	utils.SendJSONResponse(w, string(js))
+}
+
+//Check if the host support ssh, or if the target domain (and port, optional) support ssh
+func HandleWebSshSupportCheck(w http.ResponseWriter, r *http.Request) {
+	domain, err := utils.PostPara(r, "domain")
+	if err != nil {
+		//Check if ssh supported on this host
+		isSupport := sshprox.IsWebSSHSupported()
+		js, _ := json.Marshal(isSupport)
+		utils.SendJSONResponse(w, string(js))
+	} else {
+		//Domain is given. Check if port is given
+		portString, err := utils.PostPara(r, "port")
+		if err != nil {
+			portString = "22"
+		}
+
+		port, err := strconv.Atoi(portString)
+		if err != nil {
+			utils.SendErrorResponse(w, "invalid port number given")
+			return
+		}
+
+		if port < 1 || port > 65534 {
+			utils.SendErrorResponse(w, "invalid port number given")
+			return
+		}
+
+		looksLikeSSHServer := sshprox.IsSSHConnectable(domain, port)
+		js, _ := json.Marshal(looksLikeSSHServer)
+		utils.SendJSONResponse(w, string(js))
+	}
+}