[原创]gominipwn

发表于: 2025-10-7 19:17 402

[原创]gominipwn

Jtian

2025-10-7 19:17

402

说明

这是一个实验性质的项目，方便在离线场景下使用golang编写exp，编码风格参考了pwntools。

代码gominipwn

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package main
 
import (
    "bufio"
    "bytes"
    "encoding/binary"
    "encoding/hex"
    "errors"
    "fmt"
    "io"
    "net"
    "os"
    "runtime"
    "strings"
    "sync"
    "time"
)
 
// ============================= //
//     Packing/Unpacking         //
// ============================= //
 
func getEndian(endian string) (binary.ByteOrder, error) {
    e := strings.ToLower(endian)
    switch e {
    case "little", "le", "":
        return binary.LittleEndian, nil
    case "big", "be":
        return binary.BigEndian, nil
    default:
        return nil, fmt.Errorf("endian must be 'little' or 'big'")
    }
}
 
func p8(x uint8, _ ...any) []byte {
    return []byte{byte(x)}
}
 
// b: helper to convert string to []byte, similar to Python's b"..."
func b(s string) []byte {
    return []byte(s)
}
 
// cat: concatenate multiple byte slices efficiently
func cat(parts ...[]byte) []byte {
    total := 0
    for _, p := range parts {
        total += len(p)
    }
    out := make([]byte, 0, total)
    for _, p := range parts {
        out = append(out, p...)
    }
    return out
}
 
// rep: repeat a byte slice n times, like Python b"..." * n
func rep(p []byte, n int) []byte {
    if n < 0 {
        panic("rep: negative count")
    }
    if n == 0 || len(p) == 0 {
        return []byte{}
    }
    out := make([]byte, 0, len(p)*n)
    for i := 0; i < n; i++ {
        out = append(out, p...)
    }
    return out
}
 
// fromhex: decode hex string (whitespace ignored) to bytes, like Python bytes.fromhex
func fromhex(s string) []byte {
    s = strings.ReplaceAll(s, " ", "")
    if len(s)%2 != 0 {
        panic("fromhex: odd length hex string")
    }
    b, err := hex.DecodeString(s)
    if err != nil {
        panic(err)
    }
    return b
}
 
func p16(x uint16, endian ...string) []byte {
    var buf bytes.Buffer
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if err := binary.Write(&buf, order, x); err != nil {
        panic(err)
    }
    return buf.Bytes()
}
 
func p32(x uint32, endian ...string) []byte {
    var buf bytes.Buffer
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if err := binary.Write(&buf, order, x); err != nil {
        panic(err)
    }
    return buf.Bytes()
}
 
func p64(x uint64, endian ...string) []byte {
    var buf bytes.Buffer
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if err := binary.Write(&buf, order, x); err != nil {
        panic(err)
    }
    return buf.Bytes()
}
 
func u8(b []byte, _ ...any) uint8 {
    if len(b) < 1 {
        panic("u8: buffer too small")
    }
    return uint8(b[0])
}
 
func u16(b []byte, endian ...string) uint16 {
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if len(b) < 2 {
        panic("u16: buffer too small")
    }
    return order.Uint16(b[:2])
}
 
func u32(b []byte, endian ...string) uint32 {
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if len(b) < 4 {
        panic("u32: buffer too small")
    }
    return order.Uint32(b[:4])
}
 
func u64(b []byte, endian ...string) uint64 {
    e := ""
    if len(endian) > 0 {
        e = endian[0]
    }
    order, err := getEndian(e)
    if err != nil {
        panic(err)
    }
    if len(b) < 8 {
        panic("u64: buffer too small")
    }
    return order.Uint64(b[:8])
}
 
// ============================= //
//            Pwn               //
// ============================= //
 
type Pwn struct {
    conn net.Conn
    rw   *bufio.ReadWriter
 
    logPrefix map[string]string
 
    // 交互模式：在 Windows 使用 goroutine 实现
    interactiveStop chan struct{}
    onceClose       sync.Once
}
 
func NewPwn() *Pwn {
    return &Pwn{
        logPrefix: map[string]string{
            "info":    "[*] ",
            "success": "[+] ",
            "error":   "[-] ",
        },
        interactiveStop: make(chan struct{}),
    }
}
 
func (p *Pwn) log(level, msg string) {
    prefix := p.logPrefix[level]
    fmt.Printf("%s%s\n", prefix, msg)
}
 
// ============================= //
//         Core Methods          //
// ============================= //
 
func remote(host string, port int) *Pwn {
    p := NewPwn()
    address := net.JoinHostPort(host, fmt.Sprintf("%d", port))
    conn, err := net.Dial("tcp", address)
    if err != nil {
        panic(err)
    }
    p.conn = conn
    p.rw = bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
    return p
}
 
func (p *Pwn) send(data []byte) {
    if p == nil || p.conn == nil {
        panic("send: socket is not connected")
    }
    if _, err := p.rw.Write(data); err != nil {
        panic(fmt.Errorf("send write: %w", err))
    }
    if err := p.rw.Flush(); err != nil {
        panic(fmt.Errorf("send flush: %w", err))
    }
}
 
func (p *Pwn) sendline(data []byte) {
    line := append(data, '\n')
    p.send(line)
}
 
func (p *Pwn) recv(bufsize int, timeoutSec ...float64) []byte {
    if p == nil || p.conn == nil {
        panic("recv: socket is not connected")
    }
    if bufsize <= 0 {
        bufsize = 4096
    }
    // 无超时参数则阻塞（清除读超时）；否则按给定超时设置
    if len(timeoutSec) == 0 {
        if err := p.conn.SetReadDeadline(time.Time{}); err != nil {
            panic(err)
        }
    } else {
        deadline := time.Now().Add(time.Duration(timeoutSec[0]*1000) * time.Millisecond)
        if err := p.conn.SetReadDeadline(deadline); err != nil {
            panic(err)
        }
    }
    buf := make([]byte, bufsize)
    n, err := p.rw.Read(buf)
    if ne, ok := err.(net.Error); ok && ne.Timeout() {
        //panic("recv: timeout")
        return buf[:n]
    }
    if err != nil {
        panic(fmt.Errorf("recv: %w", err))
    }
    return buf[:n]
}
 
func (p *Pwn) recvuntil(delims []byte, timeoutSec ...float64) []byte {
    if p == nil || p.conn == nil {
        panic("recvuntil: socket is not connected")
    }
    if len(delims) == 0 {
        panic("recvuntil: empty delimiter")
    }
    var out bytes.Buffer
 
    // 单字节逐步读取，仿照 Python 版行为
    // 无超时参数则无限等待（清除读超时）；否则设置超时
    if len(timeoutSec) == 0 {
        if err := p.conn.SetReadDeadline(time.Time{}); err != nil {
            panic(err)
        }
    } else {
        deadline := time.Now().Add(time.Duration(timeoutSec[0]*1000) * time.Millisecond)
        if err := p.conn.SetReadDeadline(deadline); err != nil {
            panic(err)
        }
    }
 
    for {
        b, err := p.rw.ReadByte()
        if ne, ok := err.(net.Error); ok && ne.Timeout() {
            //panic("recvuntil: timeout")
            return out.Bytes()
        }
        if err != nil {
            panic(fmt.Errorf("recvuntil: %w", err))
        }
        out.WriteByte(b)
        if bytes.Contains(out.Bytes(), delims) {
            break
        }
    }
    return out.Bytes()
}
 
func (p *Pwn) interactive() {
    if p == nil || p.conn == nil {
        panic("interactive: socket is not connected")
    }
    p.log("info", "Switching to interactive mode.")
 
    if runtime.GOOS == "windows" {
        p.interactiveWindows()
    } else {
        p.interactivePosix()
    }
}
 
func (p *Pwn) interactivePosix() {
    // 简化版：使用两个 goroutine 分别复制 stdin->conn 和 conn->stdout
    stop := make(chan struct{})
    go func() {
        defer close(stop)
        if _, err := io.Copy(os.Stdout, p.conn); err != nil && !errors.Is(err, io.EOF) {
            panic(err)
        }
    }()
    go func() {
        if _, err := io.Copy(p.conn, os.Stdin); err != nil && !errors.Is(err, io.EOF) {
            panic(err)
        }
        // 结束时关闭写端以通知远端
        if err := p.conn.SetWriteDeadline(time.Now()); err != nil {
            panic(err)
        }
    }()
 
    // 等待用户 Ctrl+C 或连接关闭
    <-stop
    p.close()
}
 
func (p *Pwn) interactiveWindows() {
    // Windows 下用超时 + goroutine 模拟
    stop := make(chan struct{})
 
    go func() {
        defer close(stop)
        reader := bufio.NewReader(p.conn)
        for {
            if err := p.conn.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
                panic(err)
            }
            buf := make([]byte, 4096)
            n, err := reader.Read(buf)
            if ne, ok := err.(net.Error); ok && ne.Timeout() {
                continue
            }
            if n > 0 {
                _, _ = os.Stdout.Write(buf[:n])
            }
            if err != nil {
                panic(err)
            }
        }
    }()
 
    go func() {
        scanner := bufio.NewScanner(os.Stdin)
        for scanner.Scan() {
            line := scanner.Bytes()
            p.send(append(append([]byte{}, line...), '\n'))
        }
        if err := scanner.Err(); err != nil {
            panic(err)
        }
    }()
 
    <-stop
    p.close()
}
 
func (p *Pwn) close() {
    if p == nil {
        return
    }
    p.onceClose.Do(func() {
        if p.conn != nil {
            if err := p.conn.Close(); err != nil {
                panic(err)
            }
            p.conn = nil
        }
        p.log("info", "Connection closed.")
    })
}
 
// ============================= //
//            Main              //
// ============================= //
 
func main() {
    fmt.Println("--- Testing Endianness Packing ---")
    val := uint32(0x11223344)
    lePacked := p32(val)
    bePacked := p32(val, "big")
    fmt.Printf("Value 0x%x packed as little-endian: %v (Hex: %x)\n", val, lePacked, lePacked)
    fmt.Printf("Value 0x%x packed as big-endian:    %v (Hex: %x)\n", val, bePacked, bePacked)
    fmt.Printf("%v\n", b("abc"))
    fmt.Printf("%v\n", cat(b("中文"), b("def"), p32(123, "big"), rep(p16(0x4241), 12), fromhex("01024142434445464748")))
    fmt.Println(strings.Repeat("-", 34))
 
    // 这里给出一个尝试连接本地 4444 的示例。
    // 可配合 `nc -lnvp 4444` 测试（Windows 用 ncat 或 busybox nc）。
    p := remote("localhost", 4444)
 
    p.send(cat(b("中文"), b("def"), p32(123, "big"), rep(p16(0x4241), 12), fromhex("01024142434445464748")))
    p.send(b("\n"))
 
    welcome := p.recvuntil([]byte("\n"), 2.0)
    if len(welcome) > 0 {
        fmt.Printf("Received from server: %s\n", string(welcome))
    }
 
    p.sendline(b("Hello from minipwn!"))
    fmt.Println("Initial message sent!")
 
    p.interactive()
 
}

效果

图片描述

其他说明

打包了go1.25.1环境

cmd_go1.25.1.bat

@echo off
set "GOROOT=%~dp0\env\go1.25.1"
set "GOPATH=%~dp0\env\gopath1.25.1"
set path=%GOROOT%\bin;%GOPATH%\bin;%~dp0\env;%PATH%
 
cmd

网盘分享

1 2	`通过网盘分享的文件：gominipwn_v1.0.0.7z` `链接: https://pan.baidu.com/s/1B7QxQr04E2E6WeBd_INH-Q?pwd=rykk 提取码: rykk`

可能有用的信息

1 2	`go env` `-w GO111MODULE=on` `go env` `-w GOPROXY=https://goproxy.cn,direct`

如果在Win11上执行go run xx.go时巨卡，可以尝试通过任务管理器关闭 PCManager Service Store服务。

[原创]gominipwn

说明

代码gominipwn

效果

其他说明

打包了go1.25.1环境

可能有用的信息

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