forked from Dliv3/Venom
/
handler.go
673 lines (571 loc) · 19.6 KB
/
handler.go
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package dispather
import (
"errors"
"fmt"
"io"
"log"
"net"
"os"
"os/exec"
"runtime"
"github.com/Dliv3/Venom/global"
"github.com/Dliv3/Venom/netio"
"github.com/Dliv3/Venom/node"
"github.com/Dliv3/Venom/protocol"
"github.com/Dliv3/Venom/utils"
)
var ERR_UNKNOWN_CMD = errors.New("unknown command type")
var ERR_PROTOCOL_SEPARATOR = errors.New("unknown separator")
var ERR_TARGET_NODE = errors.New("can not find target node")
var ERR_FILE_EXISTS = errors.New("remote file already exists")
var ERR_FILE_NOT_EXISTS = errors.New("remote file not exists")
// AgentClient Admin节点作为Client
func AgentClient(conn net.Conn) {
result, peerNode := node.ClentInitConnection(conn)
if result {
log.Println("[+]Successfully connects to a new node")
go node.CurrentNode.CommandHandler(peerNode)
}
}
// AgentServer Admin节点作为Server
func AgentServer(conn net.Conn) {
log.Println("[+]Remote connection: ", conn.RemoteAddr())
result, peerNode := node.ServerInitConnection(conn)
if result {
log.Println("[+]A new node successfully connects to this node")
go node.CurrentNode.CommandHandler(peerNode)
}
}
// InitAgentHandler Agent处理Admin发出的命令
func InitAgentHandler() {
go handleSyncCmd()
go handleListenCmd()
go handleConnectCmd()
go handleDownloadCmd()
go handleUploadCmd()
go handleShellCmd()
go handleSocks5Cmd()
go handleLForwardCmd()
go handleRForwardCmd()
go handleSshConnectCmd()
}
func handleSyncCmd() {
for {
// fmt.Println("Nodes", node.Nodes)
var packetHeader protocol.PacketHeader
var syncPacket protocol.SyncPacket
node.CurrentNode.CommandBuffers[protocol.SYNC].ReadPacket(&packetHeader, &syncPacket)
// 重新初始化网络拓扑,这样当有节点断开时网络拓扑会实时改变
node.GNetworkTopology.InitNetworkMap()
node.GNetworkTopology.ResolveNetworkMapData(syncPacket.NetworkMap)
// 通信的对端节点
var peerNodeID = utils.Array32ToUUID(packetHeader.SrcHashID)
// nextNode为下一跳
nextNode := node.Nodes[node.GNetworkTopology.RouteTable[peerNodeID]]
networkMap := node.GNetworkTopology.GenerateNetworkMapData()
// 递归向其他节点发送sync同步路由表请求
for i := range node.Nodes {
if node.Nodes[i].HashID != peerNodeID && node.Nodes[i].DirectConnection {
tempPacketHeader := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(node.Nodes[i].HashID),
CmdType: protocol.SYNC,
}
tempSyncPacket := protocol.SyncPacket{
NetworkMapLen: uint64(len(networkMap)),
NetworkMap: networkMap,
}
node.Nodes[i].WritePacket(tempPacketHeader, tempSyncPacket)
node.CurrentNode.CommandBuffers[protocol.SYNC].ReadPacket(&tempPacketHeader, &tempSyncPacket)
node.GNetworkTopology.ResolveNetworkMapData(tempSyncPacket.NetworkMap)
}
}
// 生成路由表
node.GNetworkTopology.UpdateRouteTable()
// fmt.Println("RouteTable", node.GNetworkTopology.RouteTable)
// 创建Node结构体
for key, value := range node.GNetworkTopology.RouteTable {
if _, ok := node.Nodes[key]; !ok {
// node.Nodes[key] = &node.Node{
// HashID: key,
// Conn: node.Nodes[value].Conn,
// ConnReadLock: &sync.Mutex{},
// ConnWriteLock: &sync.Mutex{},
// // Socks5SessionIDLock: &sync.Mutex{},
// // Socks5DataBufferLock: &sync.RWMutex{},
// }
// node.Nodes[key].InitDataBuffer()
node.Nodes[key] = node.NewNode(
0,
key,
node.Nodes[value].Conn,
false,
)
}
}
// // 生成节点信息
// node.GNodeInfo.UpdateNoteInfo()
packetHeader = protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: packetHeader.SrcHashID,
CmdType: protocol.SYNC,
}
networkMap = node.GNetworkTopology.GenerateNetworkMapData()
syncPacket = protocol.SyncPacket{
NetworkMapLen: uint64(len(networkMap)),
NetworkMap: networkMap,
}
nextNode.WritePacket(packetHeader, syncPacket)
// fmt.Println(node.CurrentNode.HashID)
// fmt.Println(node.GNetworkTopology.RouteTable)
// fmt.Println(node.GNetworkTopology.NetworkMap)
}
}
func handleListenCmd() {
for {
var packetHeader protocol.PacketHeader
var listenPacketCmd protocol.ListenPacketCmd
node.CurrentNode.CommandBuffers[protocol.LISTEN].ReadPacket(&packetHeader, &listenPacketCmd)
// adminNode := node.Nodes[node.GNetworkTopology.RouteTable[utils.Array32ToUUID(packetHeader.SrcHashID)]]
// 网络拓扑同步完成之后即可直接使用以及构造好的节点结构体
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
err := netio.InitNode(
"listen",
fmt.Sprintf("0.0.0.0:%d", listenPacketCmd.Port),
AgentServer, false, 0)
var listenPacketRet protocol.ListenPacketRet
if err != nil {
listenPacketRet.Success = 0
listenPacketRet.Msg = []byte(fmt.Sprintf("%s", err))
} else {
listenPacketRet.Success = 1
}
listenPacketRet.MsgLen = uint32(len(listenPacketRet.Msg))
packetHeader = protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.LISTEN,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeader, listenPacketRet)
}
}
func handleConnectCmd() {
for {
var packetHeader protocol.PacketHeader
var connectPacketCmd protocol.ConnectPacketCmd
node.CurrentNode.CommandBuffers[protocol.CONNECT].ReadPacket(&packetHeader, &connectPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
err := netio.InitNode(
"connect",
fmt.Sprintf("%s:%d", utils.Uint32ToIp(connectPacketCmd.IP).String(), connectPacketCmd.Port),
AgentClient, false, 0)
var connectPacketRet protocol.ConnectPacketRet
if err != nil {
connectPacketRet.Success = 0
connectPacketRet.Msg = []byte(fmt.Sprintf("%s", err))
} else {
connectPacketRet.Success = 1
}
connectPacketRet.MsgLen = uint32(len(connectPacketRet.Msg))
packetHeader = protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.CONNECT,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeader, connectPacketRet)
}
}
func handleDownloadCmd() {
for {
var packetHeader protocol.PacketHeader
var downloadPacketCmd protocol.DownloadPacketCmd
node.CurrentNode.CommandBuffers[protocol.DOWNLOAD].ReadPacket(&packetHeader, &downloadPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
filePath := string(downloadPacketCmd.Path)
var downloadPacketRet protocol.DownloadPacketRet
var file *os.File
var fileSize int64
// 如果文件存在,则下载
if utils.FileExists(filePath) {
var err error
file, err = os.Open(filePath)
if err != nil {
downloadPacketRet.Success = 0
downloadPacketRet.Msg = []byte(fmt.Sprintf("%s", err))
} else {
defer file.Close()
downloadPacketRet.Success = 1
fileSize = utils.GetFileSize(filePath)
downloadPacketRet.FileLen = uint64(fileSize)
}
} else {
downloadPacketRet.Success = 0
downloadPacketRet.Msg = []byte(fmt.Sprintf("%s", ERR_FILE_NOT_EXISTS))
}
downloadPacketRet.MsgLen = uint32(len(downloadPacketRet.Msg))
var retPacketHeader protocol.PacketHeader
retPacketHeader.CmdType = protocol.DOWNLOAD
retPacketHeader.Separator = global.PROTOCOL_SEPARATOR
retPacketHeader.SrcHashID = packetHeader.DstHashID
retPacketHeader.DstHashID = packetHeader.SrcHashID
adminNode.WritePacket(retPacketHeader, downloadPacketRet)
if downloadPacketRet.Success == 0 {
continue
}
var cmdPacketHeader protocol.PacketHeader
node.CurrentNode.CommandBuffers[protocol.DOWNLOAD].ReadPacket(&cmdPacketHeader, &downloadPacketCmd)
if downloadPacketCmd.StillDownload == 0 {
continue
}
adminNode.WritePacket(retPacketHeader, downloadPacketRet)
var dataBlockSize = uint64(global.MAX_PACKET_SIZE - 4)
loop := int64(downloadPacketRet.FileLen / dataBlockSize)
remainder := downloadPacketRet.FileLen % dataBlockSize
var size int64
for ; loop >= 0; loop-- {
var buf []byte
if loop > 0 {
buf = make([]byte, dataBlockSize)
} else {
buf = make([]byte, remainder)
}
n, err := io.ReadFull(file, buf)
if n > 0 {
size += int64(n)
dataPacket := protocol.FileDataPacket{
DataLen: uint32(n),
Data: buf[0:n],
}
retPacketHeader := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: packetHeader.SrcHashID,
CmdType: protocol.DOWNLOAD,
}
adminNode.WritePacket(retPacketHeader, dataPacket)
}
if err != nil {
if err != io.EOF {
log.Println("[-]Read file error")
}
break
}
}
}
}
func handleUploadCmd() {
for {
/* ------ before upload ------- */
var packetHeader protocol.PacketHeader
var uploadPacketCmd protocol.UploadPacketCmd
node.CurrentNode.CommandBuffers[protocol.UPLOAD].ReadPacket(&packetHeader, &uploadPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
packetHeaderRet := protocol.PacketHeader{
CmdType: protocol.UPLOAD,
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: packetHeader.DstHashID,
DstHashID: packetHeader.SrcHashID,
}
var uploadPacketRet protocol.UploadPacketRet
var filePath = string(uploadPacketCmd.Path)
var file *os.File
// 如果文件不存在,则上传
if !utils.FileExists(filePath) {
var err error
file, err = os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
uploadPacketRet.Success = 0
uploadPacketRet.Msg = []byte(fmt.Sprintf("%s", err))
} else {
uploadPacketRet.Success = 1
defer file.Close()
}
} else {
uploadPacketRet.Success = 0
uploadPacketRet.Msg = []byte(fmt.Sprintf("%s %s", filePath, ERR_FILE_EXISTS))
}
uploadPacketRet.MsgLen = uint32(len(uploadPacketRet.Msg))
adminNode.WritePacket(packetHeaderRet, uploadPacketRet)
if uploadPacketRet.Success == 0 || file == nil {
continue
}
// /* ----- upload file -------- */
node.CurrentNode.CommandBuffers[protocol.UPLOAD].ReadPacket(&packetHeader, &uploadPacketCmd)
var uploadPacketRet2 protocol.UploadPacketRet
var dataBlockSize = uint64(global.MAX_PACKET_SIZE - 4)
loop := int64(uploadPacketCmd.FileLen / dataBlockSize)
remainder := uploadPacketCmd.FileLen % dataBlockSize
for loop >= 0 {
if remainder != 0 {
var fileDataPacket protocol.FileDataPacket
var packetHeaderRet protocol.PacketHeader
node.CurrentNode.CommandBuffers[protocol.UPLOAD].ReadPacket(&packetHeaderRet, &fileDataPacket)
_, err := file.Write(fileDataPacket.Data)
if err != nil {
uploadPacketRet2.Success = 0
uploadPacketRet2.Msg = []byte(fmt.Sprintf("%s", err))
}
}
loop--
}
file.Close()
uploadPacketRet2.Success = 1
uploadPacketRet2.MsgLen = uint32(len(uploadPacketRet.Msg))
adminNode.WritePacket(packetHeaderRet, uploadPacketRet2)
}
}
func handleShellCmd() {
for {
var packetHeader protocol.PacketHeader
var shellPacketCmd protocol.ShellPacketCmd
node.CurrentNode.CommandBuffers[protocol.SHELL].ReadPacket(&packetHeader, &shellPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
if shellPacketCmd.Start != 1 {
continue
}
var cmd *exec.Cmd
switch utils.GetSystemType() {
// windows
case 0x01:
cmd = exec.Command("c:\\windows\\system32\\cmd.exe")
// mac , linux, others
default:
if runtime.GOARCH == "386" || runtime.GOARCH == "amd64" {
cmd = exec.Command("/bin/bash", "-i")
} else {
cmd = exec.Command("/bin/sh", "-i")
}
}
out, _ := cmd.StdoutPipe()
in, _ := cmd.StdinPipe()
cmd.Stderr = cmd.Stdout
if err := cmd.Start(); err != nil {
// log.Fatal(err)
shellPacketRet := protocol.ShellPacketRet{
Success: 0,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.SHELL,
SrcHashID: packetHeader.DstHashID,
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeaderRet, shellPacketRet)
continue
}
shellPacketRet := protocol.ShellPacketRet{
Success: 1,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.SHELL,
SrcHashID: packetHeader.DstHashID,
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeaderRet, shellPacketRet)
c := make(chan bool, 2)
go CopyNode2StdinPipe(adminNode, in, c, cmd)
go CopyStdoutPipe2Node(out, adminNode, c)
<-c
<-c
cmd.Wait()
// exit
ShellPacketRet := protocol.ShellPacketRet{
Success: 0,
}
packetHeader = protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.SHELL,
SrcHashID: packetHeader.DstHashID,
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeader, ShellPacketRet)
}
}
// handleSocks5Cmd 从node.CommandBuffers[protocol.SOCKS]中读取命令并处理
func handleSocks5Cmd() {
for {
// 启动socks5的命令数据包
var packetHeader protocol.PacketHeader
var socks5ControlCmd protocol.Socks5ControlPacketCmd
node.CurrentNode.CommandBuffers[protocol.SOCKS].ReadPacket(&packetHeader, &socks5ControlCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
// 初始化对应SessionID的Buffer
adminNode.DataBuffers[protocol.SOCKSDATA].NewDataBuffer(socks5ControlCmd.SessionID)
// 返回启动成功命令
socks5ControlRet := protocol.Socks5ControlPacketRet{
Success: 1,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.SOCKS,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: packetHeader.SrcHashID,
}
adminNode.WritePacket(packetHeaderRet, socks5ControlRet)
go func() {
defer func() {
socks5CloseData := protocol.NetDataPacket{
SessionID: socks5ControlCmd.SessionID,
Close: 1,
}
packetHeader := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.SOCKSDATA,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
}
adminNode.WritePacket(packetHeader, socks5CloseData)
// adminNode.DataBuffers[protocol.SOCKSDATA].RealseDataBuffer(socks5ControlCmd.SessionID)
// runtime.GC()
}()
if err := AgentHandShake(adminNode, socks5ControlCmd.SessionID); err != nil {
log.Println("[-]Socks handshake error:", err)
return
}
addr, err := AgentParseTarget(adminNode, socks5ControlCmd.SessionID)
if err != nil {
log.Println("[-]Socks consult transfer mode or parse target error:", err)
return
}
PipeWhenClose(adminNode, socks5ControlCmd.SessionID, addr)
}()
}
}
func handleLForwardCmd() {
for {
var packetHeader protocol.PacketHeader
var lforwardPacketCmd protocol.NetLForwardPacketCmd
node.CurrentNode.CommandBuffers[protocol.LFORWARD].ReadPacket(&packetHeader, &lforwardPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
dport := lforwardPacketCmd.DstPort
err := netio.InitTCP(
"listen",
fmt.Sprintf("0.0.0.0:%d", dport),
adminNode.HashID,
localLForwardServer,
lforwardPacketCmd.LHost,
lforwardPacketCmd.SrcPort,
)
lforwardPacketRet := protocol.NetLForwardPacketRet{
SessionID: 0,
Success: 1,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
CmdType: protocol.LFORWARD,
}
if err != nil {
log.Println("[-]LForward tcp listen error")
lforwardPacketRet.Success = 0
node.Nodes[adminNode.HashID].WritePacket(packetHeaderRet, lforwardPacketRet)
}
}
}
func localLForwardServer(conn net.Conn, peerNodeID string, done chan bool, args ...interface{}) {
// fmt.Println("localLForwardServer")
// defer conn.Close()
adminNode := node.Nodes[peerNodeID]
currentSessionID := adminNode.DataBuffers[protocol.LFORWARDDATA].GetSessionID()
defer func() {
// fmt.Println("################ agent close ################")
lforwardDataPacketCloseData := protocol.NetDataPacket{
SessionID: currentSessionID,
Close: 1,
}
packetHeader := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.LFORWARDDATA,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
}
adminNode.WritePacket(packetHeader, lforwardDataPacketCloseData)
// adminNode.DataBuffers[protocol.LFORWARDDATA].RealseDataBuffer(currentSessionID)
// runtime.GC()
}()
adminNode.DataBuffers[protocol.LFORWARDDATA].NewDataBuffer(currentSessionID)
lforwardPacketRet := protocol.NetLForwardPacketRet{
SessionID: currentSessionID,
Success: 1,
LHost: args[0].([]interface{})[0].(uint32),
SrcPort: args[0].([]interface{})[1].(uint16),
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
CmdType: protocol.LFORWARD,
}
adminNode.WritePacket(packetHeaderRet, lforwardPacketRet)
c := make(chan bool, 2)
// 从node DataBuffer中读取数据,发送给客户端
go node.CopyNet2Node(conn, adminNode, currentSessionID, protocol.LFORWARDDATA, c)
go node.CopyNode2Net(adminNode, conn, currentSessionID, protocol.LFORWARDDATA, c)
// exit
<-c
<-done
}
func handleRForwardCmd() {
for {
// 启动socks5的命令数据包
var packetHeader protocol.PacketHeader
var rforwardPacketCmd protocol.NetRForwardPacketCmd
node.CurrentNode.CommandBuffers[protocol.RFORWARD].ReadPacket(&packetHeader, &rforwardPacketCmd)
adminNode := node.Nodes[utils.Array32ToUUID(packetHeader.SrcHashID)]
rhost := utils.Uint32ToIp(rforwardPacketCmd.RHost).String()
sport := rforwardPacketCmd.SrcPort
err := netio.InitTCP(
"connect",
fmt.Sprintf("%s:%d", rhost, sport),
adminNode.HashID,
func(conn net.Conn, peerNodeID string, done chan bool, args ...interface{}) {
rforwardPacketRet := protocol.NetRForwardPacketRet{
Success: 1,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.RFORWARD,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
}
adminNode.WritePacket(packetHeaderRet, rforwardPacketRet)
currentSessionID := rforwardPacketCmd.SessionID
adminNode.DataBuffers[protocol.RFORWARDDATA].NewDataBuffer(currentSessionID)
defer func() {
closeData := protocol.NetDataPacket{
SessionID: currentSessionID,
Close: 1,
}
packetHeader := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.RFORWARDDATA,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
}
adminNode.WritePacket(packetHeader, closeData)
}()
c := make(chan bool, 2)
go node.CopyNode2Net(adminNode, conn, currentSessionID, protocol.RFORWARDDATA, c)
go node.CopyNet2Node(conn, adminNode, currentSessionID, protocol.RFORWARDDATA, c)
<-c
})
if err != nil {
rforwardPacketRet := protocol.NetRForwardPacketRet{
Success: 0,
}
packetHeaderRet := protocol.PacketHeader{
Separator: global.PROTOCOL_SEPARATOR,
CmdType: protocol.RFORWARD,
SrcHashID: utils.UUIDToArray32(node.CurrentNode.HashID),
DstHashID: utils.UUIDToArray32(adminNode.HashID),
}
adminNode.WritePacket(packetHeaderRet, rforwardPacketRet)
}
}
}