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proxy_helper.go
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/*
* Description : HTTP&HTTPs代理并拦截HTTP的数据包; socket5代理 TODO 测试
* Author : ManGe
* Mail : 2912882908@qq.com
**/
package gathertool
import (
"bytes"
"compress/gzip"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"encoding/base64"
"encoding/pem"
"fmt"
"io"
"math/big"
"net"
"net/http"
"net/url"
"os"
"strconv"
"strings"
"time"
)
// Intercept http/s 代理与抓包
type Intercept struct {
Ip string
HttpPackageFunc func(pack *HttpPackage)
}
// RunServer 启动 http/s 代理与抓包服务
func (ipt *Intercept) RunServer() {
Info("启动代理&抓包 <ManGe代理&抓包> ......... ")
Info(" - HTTPS代理 : 只支持代理转发 -> ", ipt.Ip)
Info(" - HTTP代理: 支持数据包处理与代理转发 -> ", ipt.Ip)
cert, err := genCertificate()
if err != nil {
panic(err)
}
server := &http.Server{
Addr: ipt.Ip,
TLSConfig: &tls.Config{Certificates: []tls.Certificate{cert}},
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodConnect {
Info("HTTPS 请求, 不支持数据包处理，只能进行代理转发!! | ", r.URL.String())
destConn, err := net.DialTimeout("tcp", r.Host, 60*time.Second)
if err != nil {
http.Error(w, err.Error(), http.StatusServiceUnavailable)
return
}
w.WriteHeader(http.StatusOK)
hijacker, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "Hijacking not supported", http.StatusInternalServerError)
return
}
clientConn, _, err := hijacker.Hijack()
if err != nil {
http.Error(w, err.Error(), http.StatusServiceUnavailable)
}
go func() {
_, _ = io.Copy(clientConn, destConn)
}()
go func() {
_, _ = io.Copy(destConn, clientConn)
}()
} else {
Info("HTTP 请求")
res, err := http.DefaultTransport.RoundTrip(r)
if err != nil {
http.Error(w, err.Error(), http.StatusServiceUnavailable)
return
}
defer func() {
_ = res.Body.Close()
}()
for k, vv := range res.Header {
for _, v := range vv {
w.Header().Add(k, v)
}
}
var bodyBytes []byte
bodyBytes, _ = io.ReadAll(res.Body)
res.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
w.WriteHeader(res.StatusCode)
httpPackage := &HttpPackage{
Url: r.URL,
ContentType: res.Header.Get("Content-Type"),
Body: bodyBytes,
Header: res.Header,
}
ipt.HttpPackageFunc(httpPackage)
_, _ = io.Copy(w, res.Body)
_ = res.Body.Close()
}
}),
}
err = server.ListenAndServe()
if err != nil {
panic(err)
}
}
// RunHttpIntercept 启动 http/s 代理与抓包服务
func (ipt *Intercept) RunHttpIntercept() {
Info("启动抓包 <ManGe抓包> ......... ")
Info("目前只支持HTTP, HTTPS还在开发中 ......... ")
Info("请在系统设置代理 HTTP代理 ", ipt.Ip)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
Info("\n\n___________________________________________________________________________")
Info("代理请求信息： ", r.RemoteAddr, r.Method, r.URL.String())
transport := http.DefaultTransport
outReq := new(http.Request)
*outReq = *r
if clientIP, _, err := net.SplitHostPort(r.RemoteAddr); err == nil {
if prior, ok := outReq.Header["X-Forwarded-For"]; ok {
clientIP = strings.Join(prior, ", ") + ", " + clientIP
}
outReq.Header.Set("X-Forwarded-For", clientIP)
}
res, err := transport.RoundTrip(outReq)
if err != nil {
w.WriteHeader(http.StatusBadGateway)
return
}
for key, value := range res.Header {
for _, v := range value {
w.Header().Add(key, v)
}
}
var bodyBytes []byte
bodyBytes, _ = io.ReadAll(res.Body)
res.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
w.WriteHeader(res.StatusCode)
httpPackage := &HttpPackage{
Url: r.URL,
ContentType: res.Header.Get("Content-Type"),
Body: bodyBytes,
Header: res.Header,
}
ipt.HttpPackageFunc(httpPackage)
_, _ = io.Copy(w, res.Body)
_ = res.Body.Close()
})
err := http.ListenAndServe(ipt.Ip, nil)
if err != nil {
panic(err)
}
}
func genCertificate() (cert tls.Certificate, err error) {
rawCert, rawKey, err := generateKeyPair()
if err != nil {
return
}
return tls.X509KeyPair(rawCert, rawKey)
}
func generateKeyPair() (rawCert, rawKey []byte, err error) {
// Create private key and self-signed certificate
// Adapted from https://golang.org/src/crypto/tls/generate_cert.go
private, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return
}
validFor := time.Hour * 24 * 365 * 10 // ten years
notBefore := time.Now()
notAfter := notBefore.Add(validFor)
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
template := x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"ManGe-gatherTool"},
},
NotBefore: notBefore,
NotAfter: notAfter,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &private.PublicKey, private)
if err != nil {
return
}
rawCert = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
rawKey = pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(private)})
return
}
// HttpPackage 代理服务抓取到的HTTP的包
type HttpPackage struct {
Url *url.URL
Body []byte
ContentType string
Header map[string][]string
}
// Img2Base64 如果数据类型是image 就转换成base64的图片输出
func (pack *HttpPackage) Img2Base64() string {
if strings.Index(pack.ContentType, "image") != -1 {
return base64.StdEncoding.EncodeToString(pack.Body)
}
return ""
}
// Html 数据类型是html
func (pack *HttpPackage) Html() string {
if strings.Index(pack.ContentType, "html") != -1 {
rdata := strings.NewReader(string(pack.Body))
r, err := gzip.NewReader(rdata)
if err == nil {
s, _ := io.ReadAll(r)
return string(s)
}
}
return ""
}
// SaveImage 如果数据类型是image 就保存图片
func (pack *HttpPackage) SaveImage(path string) error {
if strings.Index(pack.ContentType, "image") != -1 {
idx := strings.LastIndex(pack.Url.String(), "/")
if idx < 0 {
path += pack.Url.String()
} else {
path += pack.Url.String()[idx+1:]
}
return os.WriteFile(path, pack.Body, 0666)
}
return fmt.Errorf("ContentType not image")
}
// Json 数据类型是json
func (pack *HttpPackage) Json() string {
if strings.Index(pack.ContentType, "json") != -1 {
return string(pack.Body)
}
return ""
}
// Txt 数据类型是txt
func (pack *HttpPackage) Txt() string {
if strings.Index(pack.ContentType, "txt") != -1 {
rdata := strings.NewReader(string(pack.Body))
r, err := gzip.NewReader(rdata)
if err == nil {
s, _ := io.ReadAll(r)
return string(s)
}
}
return ""
}
// ToFile 抓取到的数据类型保存到文件
func (pack *HttpPackage) ToFile(path string) error {
ext := ContentType[pack.ContentType]
path = path + Any2String(time.Now().UnixNano()) + ext
return os.WriteFile(path, pack.Body, 0666)
}
// ContentType 数据类型
var ContentType = map[string]string{
"application/octet-stream": ".*",
"application/x-001": ".001",
"application/x-301": ".301",
"text/h323": ".323",
"application/x-906": ".906",
"drawing/907": ".907",
"application/x-a11": ".a11",
"audio/x-mei-aac": ".acp",
"application/postscript": ".ai",
"audio/aiff": ".aif",
"application/x-anv": ".anv",
"text/asa": ".asa",
"video/x-ms-asf": ".asf",
"text/asp": ".asp",
"audio/basic": ".au",
"video/avi": ".avi",
"application/vnd.adobe.workflow": ".awf",
"text/xml": ".biz",
"application/x-bmp": ".bmp",
"application/x-bot": ".bot",
"application/x-c4t": ".c4t",
"application/x-c90": ".c90",
"application/x-cals": ".cal",
"application/vnd.ms-pki.seccat": ".cat",
"application/x-netcdf": ".cdf",
"application/x-cdr": ".cdr",
"application/x-cel": ".cel",
"application/x-x509-ca-cert": ".cer",
"application/x-g4": ".cg4",
"application/x-cgm": ".cgm",
"application/x-cit": ".cit",
"java/*": ".class",
"application/x-cmp": ".cmp",
"application/x-cmx": ".cmx",
"application/x-cot": ".cot",
"application/pkix-crl": ".crl",
"application/x-csi": ".csi",
"text/css": ".css",
"application/x-cut": ".cut",
"application/x-dbf": ".dbf",
"application/x-dbm": ".dbm",
"application/x-dbx": ".dbx",
"application/x-dcx": ".dcx",
"application/x-dgn": ".dgn",
"application/x-dib": ".dib",
"application/x-msdownload": ".exe",
"application/msword": ".doc",
"application/x-drw": ".drw",
"Model/vnd.dwf": ".dwf",
"application/x-dwf": ".dwf",
"application/x-dwg": ".dwg",
"application/x-dxb": ".dxb",
"application/x-dxf": ".dxf",
"application/vnd.adobe.edn": ".edn",
"application/x-emf": ".emf",
"message/rfc822": ".eml",
"application/x-epi": ".epi",
"application/x-ps": ".eps",
"application/x-ebx": ".etd",
"image/fax": ".fax",
"application/vnd.fdf": ".fdf",
"application/fractals": ".fif",
"application/x-frm": ".frm",
"application/x-gbr": ".gbr",
"application/x-gcd": ".gcd",
"image/gif": ".gif",
"application/x-gl2": ".gl2",
"application/x-gp4": ".gp4",
"application/x-hgl": ".hgl",
"application/x-hmr": ".hmr",
"application/x-hpgl": ".hpg",
"application/x-hpl": ".hpl",
"application/mac-binhex40": ".hqx",
"application/x-hrf": ".hrf",
"application/hta": ".hta",
"text/x-component": ".htc",
"text/html": ".html",
"text/webviewhtml": ".htt",
"application/x-icb": ".icb",
"image/x-icon": ".ico",
"application/x-ico": ".ico",
"application/x-iff": ".iff",
"application/x-igs": ".igs",
"application/x-iphone": ".iii",
"application/x-img": ".img",
"application/x-internet-signup": ".ins",
"video/x-ivf": ".IVF",
"image/jpeg": ".jpg",
"application/x-jpe": ".jpe",
"application/x-jpg": ".jpg",
"application/x-javascript": ".js",
"audio/x-liquid-file": ".la1",
"application/x-laplayer-reg": ".lar",
"application/x-latex": ".latex",
"audio/x-liquid-secure": ".lavs",
"application/x-lbm": ".lbm",
"audio/x-la-lms": ".lmsff",
"application/x-ltr": ".ltr",
"video/x-mpeg": ".m1v",
"audio/mpegurl": ".m3u",
"video/mpeg4": ".m4e",
"application/x-mac": ".mac",
"application/x-troff-man": ".man",
"application/msaccess": ".mdb",
"application/x-mdb": ".mdb",
"application/x-shockwave-flash": ".mfp",
"application/x-mi": ".mi",
"audio/mid": ".mid",
"application/x-mil": ".mil",
"audio/x-musicnet-download": ".mnd",
"audio/x-musicnet-stream": ".mns",
"video/x-sgi-movie": ".movie",
"audio/mp1": ".mp1",
"audio/mp2": ".mp2",
"video/mpeg": ".mp2v",
"audio/mp3": ".mp3",
"video/x-mpg": ".mpa",
"application/vnd.ms-project": ".mpd",
"video/mpg": ".mpeg",
"audio/rn-mpeg": ".mpga",
"application/x-mmxp": ".mxp",
"image/pnetvue": ".net",
"application/x-nrf": ".nrf",
"text/x-ms-odc": ".odc",
"application/x-out": ".out",
"application/pkcs10": ".p10",
"application/x-pkcs12": ".p12",
"application/x-pkcs7-certificates": ".p7b",
"application/pkcs7-mime": ".p7c",
"application/x-pkcs7-certreqresp": ".p7r",
"application/pkcs7-signature": ".p7s",
"application/x-pc5": ".pc5",
"application/x-pci": ".pci",
"application/x-pcl": ".pcl",
"application/x-pcx": ".pcx",
"application/pdf": ".pdf",
"application/vnd.adobe.pdx": ".pdx",
"application/x-pgl": ".pgl",
"application/x-pic": ".pic",
"application/vnd.ms-pki.pko": ".pko",
"application/x-perl": ".pl",
"audio/scpls": ".pls",
"application/x-plt": ".plt",
"image/png": ".png",
"application/x-png": ".png",
"application/vnd.ms-powerpoint": ".ppt",
"application/x-ppm": ".ppm",
"application/x-ppt": ".ppt",
"application/x-pr": ".pr",
"application/pics-rules": ".prf",
"application/x-prn": ".prn",
"application/x-prt": ".prt",
"application/x-ptn": ".ptn",
"text/vnd.rn-realtext3d": ".r3t",
"audio/vnd.rn-realaudio": ".ra",
"audio/x-pn-realaudio": ".ram",
"application/x-ras": ".ras",
"application/rat-file": ".rat",
"application/vnd.rn-recording": ".rec",
"application/x-red": ".red",
"application/x-rgb": ".rgb",
"application/vnd.rn-realsystem-rjs": ".rjs",
"application/vnd.rn-realsystem-rjt": ".rjt",
"application/x-rlc": ".rlc",
"application/x-rle": ".rle",
"application/vnd.rn-realmedia": ".rm",
"application/vnd.adobe.rmf": ".rmf",
"application/vnd.rn-realsystem-rmj": ".rmj",
"application/vnd.rn-rn_music_package": ".rmp",
"application/vnd.rn-realmedia-secure": ".rms",
"application/vnd.rn-realmedia-vbr": ".rmvb",
"application/vnd.rn-realsystem-rmx": ".rmx",
"application/vnd.rn-realplayer": ".rnx",
"image/vnd.rn-realpix": ".rp",
"audio/x-pn-realaudio-plugin": ".rpm",
"application/vnd.rn-rsml": ".rsml",
"text/vnd.rn-realtext": ".rt",
"application/x-rtf": ".rtf",
"video/vnd.rn-realvideo": ".rv",
"application/x-sam": ".sam",
"application/x-sat": ".sat",
"application/sdp": ".sdp",
"application/x-sdw": ".sdw",
"application/x-stuffit": ".sit",
"application/x-slb": ".slb",
"application/x-sld": ".sld",
"drawing/x-slk": ".slk",
"application/smil": ".smi",
"application/x-smk": ".smk",
"text/plain": ".sol",
"application/futuresplash": ".spl",
"application/streamingmedia": ".ssm",
"application/vnd.ms-pki.certstore": ".sst",
"application/vnd.ms-pki.stl": ".stl",
"application/x-sty": ".sty",
"application/x-tdf": ".tdf",
"application/x-tg4": ".tg4",
"application/x-tga": ".tga",
"image/tiff": ".tif",
"application/x-tif": ".tif",
"drawing/x-top": ".top",
"application/x-bittorrent": ".torrent",
"application/x-icq": ".uin",
"text/iuls": ".uls",
"text/x-vcard": ".vcf",
"application/x-vda": ".vda",
"application/vnd.visio": ".vdx",
"application/x-vpeg005": ".vpg",
"application/x-vsd": ".vsd",
"application/x-vst": ".vst",
"audio/wav": ".wav",
"audio/x-ms-wax": ".wax",
"application/x-wb1": ".wb1",
"application/x-wb2": ".wb2",
"application/x-wb3": ".wb3",
"image/vnd.wap.wbmp": ".wbmp",
"application/x-wk3": ".wk3",
"application/x-wk4": ".wk4",
"application/x-wkq": ".wkq",
"application/x-wks": ".wks",
"video/x-ms-wm": ".wm",
"audio/x-ms-wma": ".wma",
"application/x-ms-wmd": ".wmd",
"application/x-wmf": ".wmf",
"text/vnd.wap.wml": ".wml",
"video/x-ms-wmv": ".wmv",
"video/x-ms-wmx": ".wmx",
"application/x-ms-wmz": ".wmz",
"application/x-wp6": ".wp6",
"application/x-wpd": ".wpd",
"application/x-wpg": ".wpg",
"application/vnd.ms-wpl": ".wpl",
"application/x-wq1": ".wq1",
"application/x-wr1": ".wr1",
"application/x-wri": ".wri",
"application/x-wrk": ".wrk",
"application/x-ws": ".ws",
"text/scriptlet": ".wsc",
"video/x-ms-wvx": ".wvx",
"application/vnd.adobe.xdp": ".xdp",
"application/vnd.adobe.xfd": ".xfd",
"application/vnd.adobe.xfdf": ".xfdf",
"application/vnd.ms-excel": ".xls",
"application/x-xls": ".xls",
"application/x-xlw": ".xlw",
"application/x-xwd": ".xwd",
"application/x-x_b": ".x_b",
"application/x-x_t": ".x_t",
"application/json": ".json",
"text/x-json": ".json",
"application/andrew-inset": ".ez",
"application/mac-compactpro": ".cpt",
"application/oda": ".oda",
"application/vnd.mif": ".mif",
"application/vnd.wap.wbxml": ".wbxml",
"application/vnd.wap.wmlc": ".wmlc",
"application/vnd.wap.wmlscriptc": ".wmlsc",
"application/x-bcpio": ".bcpio",
"application/x-cdlink": ".vcd",
"application/x-chess-pgn": ".pgn",
"application/x-cpio": ".cpio",
"application/x-csh": ".csh",
"application/x-director": ".dcr",
"application/x-dvi": ".dvi",
"application/x-futuresplash": ".spl",
"application/x-gtar": ".gtar",
"application/x-hdf": ".hdf",
"application/x-koan": ".skp",
"application/x-sh": ".sh",
"application/x-shar": ".shar",
"application/x-sv4cpio": ".sv4cpio",
"application/x-sv4crc": ".sv4crc",
"application/x-tar": ".tar",
"application/x-tcl": ".tcl",
"application/x-tex": ".tex",
"application/x-texinfo": ".texinfo",
"application/x-troff": ".t",
"application/x-troff-me": ".me",
"application/x-troff-ms": ".ms",
"application/x-ustar": ".ustar",
"application/x-wais-source": ".src",
"application/zip": ".zip",
"audio/midi": ".mid",
"audio/mpeg": ".mpga",
"audio/x-aiff": ".aif",
"audio/x-mpegurl": ".m3u",
"audio/x-realaudio": ".ra",
"audio/x-wav": ".wav",
"chemical/x-pdb": ".pdb",
"chemical/x-xyz": ".xyz",
"image/bmp": ".bmp",
"image/ief": ".ief",
"image/vnd.djvu": ".djvu",
"image/x-cmu-raster": ".ras",
"image/x-portable-anymap": ".pnm",
"image/x-portable-bitmap": ".pbm",
"image/x-portable-graymap": ".pgm",
"image/x-portable-pixmap": ".ppm",
"image/x-rgb": ".rgb",
"image/x-xbitmap": ".xbm",
"image/x-xpixmap": ".xpm",
"image/x-xwindowdump": ".xwd",
"model/iges": ".igs",
"model/mesh": ".msh",
"model/vrml": ".wrl",
"text/richtext": ".rtx",
"text/rtf": ".rtf",
"text/sgml": ".sgml",
"text/tab-separated-values": ".tsv",
"text/vnd.wap.wmlscript": ".wmls",
"text/x-setext": ".etx",
"video/quicktime": ".qt",
"video/vnd.mpegurl": ".mxu",
"video/x-msvideo": ".avi",
"x-conference/x-cooltalk": ".ice",
}
// SocketProxy 启动一个socket5代理
func SocketProxy(addr string) {
l, err := net.Listen("tcp", addr)
if err != nil {
Panic(err)
}
for {
client, err := l.Accept()
if err != nil {
Panic(err)
}
go handleClientRequest2(client)
}
}
func handleClientRequest2(client net.Conn) {
defer func() {
if err := recover(); err != nil {
Error(err)
}
}()
Info("socket 请求 : ", client.RemoteAddr(), " --> ", client.LocalAddr())
if client == nil {
return
}
defer func() {
_ = client.Close()
}()
var b [1024 * 100]byte
n, err := client.Read(b[:])
if err != nil {
Error(err)
return
}
if b[0] == 0x05 { //只处理Socks5协议
//客户端回应：Socks服务端不需要验证方式
_, _ = client.Write([]byte{0x05, 0x00})
n, err = client.Read(b[:])
var host, port string
switch b[3] {
case 0x01: //IP V4
host = net.IPv4(b[4], b[5], b[6], b[7]).String()
case 0x03: //域名
host = string(b[5 : n-2]) //b[4]表示域名的长度
case 0x04: //IP V6
host = net.IP{b[4], b[5], b[6], b[7], b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15], b[16], b[17], b[18], b[19]}.String()
}
port = strconv.Itoa(int(b[n-2])<<8 | int(b[n-1]))
server, err := net.Dial("tcp", net.JoinHostPort(host, port))
if err != nil {
Error(err)
return
}
defer func() {
_ = server.Close()
}()
_, _ = client.Write([]byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}) //响应客户端连接成功
//进行转发
go func() {
_, _ = io.Copy(server, client)
}()
_, _ = io.Copy(client, server)
}
}