forked from snail007/goproxy
/
functions.go
executable file
·536 lines (512 loc) · 12.6 KB
/
functions.go
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package utils
import (
"bufio"
"bytes"
"crypto/sha1"
"crypto/tls"
"crypto/x509"
"encoding/binary"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
"os"
"os/exec"
"golang.org/x/crypto/pbkdf2"
"proxy/utils/id"
"strconv"
"strings"
"time"
kcp "github.com/xtaci/kcp-go"
)
func IoBind(dst io.ReadWriteCloser, src io.ReadWriteCloser, fn func(err interface{})) {
go func() {
defer func() {
if err := recover(); err != nil {
log.Printf("bind crashed %s", err)
}
}()
e1 := make(chan interface{}, 1)
e2 := make(chan interface{}, 1)
go func() {
defer func() {
if err := recover(); err != nil {
log.Printf("bind crashed %s", err)
}
}()
//_, err := io.Copy(dst, src)
err := ioCopy(dst, src)
e1 <- err
}()
go func() {
defer func() {
if err := recover(); err != nil {
log.Printf("bind crashed %s", err)
}
}()
//_, err := io.Copy(src, dst)
err := ioCopy(src, dst)
e2 <- err
}()
var err interface{}
select {
case err = <-e1:
//log.Printf("e1")
case err = <-e2:
//log.Printf("e2")
}
src.Close()
dst.Close()
fn(err)
}()
}
func ioCopy(dst io.ReadWriter, src io.ReadWriter) (err error) {
buf := make([]byte, 32*1024)
n := 0
for {
n, err = src.Read(buf)
if n > 0 {
if _, e := dst.Write(buf[0:n]); e != nil {
return e
}
}
if err != nil {
return
}
}
}
func TlsConnectHost(host string, timeout int, certBytes, keyBytes []byte) (conn tls.Conn, err error) {
h := strings.Split(host, ":")
port, _ := strconv.Atoi(h[1])
return TlsConnect(h[0], port, timeout, certBytes, keyBytes)
}
func TlsConnect(host string, port, timeout int, certBytes, keyBytes []byte) (conn tls.Conn, err error) {
conf, err := getRequestTlsConfig(certBytes, keyBytes)
if err != nil {
return
}
_conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%d", host, port), time.Duration(timeout)*time.Millisecond)
if err != nil {
return
}
return *tls.Client(_conn, conf), err
}
func getRequestTlsConfig(certBytes, keyBytes []byte) (conf *tls.Config, err error) {
var cert tls.Certificate
cert, err = tls.X509KeyPair(certBytes, keyBytes)
if err != nil {
return
}
serverCertPool := x509.NewCertPool()
ok := serverCertPool.AppendCertsFromPEM(certBytes)
if !ok {
err = errors.New("failed to parse root certificate")
}
conf = &tls.Config{
RootCAs: serverCertPool,
Certificates: []tls.Certificate{cert},
ServerName: "proxy",
InsecureSkipVerify: false,
}
return
}
func ConnectHost(hostAndPort string, timeout int) (conn net.Conn, err error) {
conn, err = net.DialTimeout("tcp", hostAndPort, time.Duration(timeout)*time.Millisecond)
return
}
func ConnectKCPHost(hostAndPort, method, key string) (conn net.Conn, err error) {
kcpconn, err := kcp.DialWithOptions(hostAndPort, GetKCPBlock(method, key), 10, 3)
if err != nil {
return
}
kcpconn.SetNoDelay(1, 10, 2, 1)
kcpconn.SetWindowSize(1024, 1024)
kcpconn.SetMtu(1400)
kcpconn.SetACKNoDelay(false)
return kcpconn, err
}
func ListenTls(ip string, port int, certBytes, keyBytes []byte) (ln *net.Listener, err error) {
var cert tls.Certificate
cert, err = tls.X509KeyPair(certBytes, keyBytes)
if err != nil {
return
}
clientCertPool := x509.NewCertPool()
ok := clientCertPool.AppendCertsFromPEM(certBytes)
if !ok {
err = errors.New("failed to parse root certificate")
}
config := &tls.Config{
ClientCAs: clientCertPool,
ServerName: "proxy",
Certificates: []tls.Certificate{cert},
ClientAuth: tls.RequireAndVerifyClientCert,
}
_ln, err := tls.Listen("tcp", fmt.Sprintf("%s:%d", ip, port), config)
if err == nil {
ln = &_ln
}
return
}
func PathExists(_path string) bool {
_, err := os.Stat(_path)
if err != nil && os.IsNotExist(err) {
return false
}
return true
}
func HTTPGet(URL string, timeout int) (err error) {
tr := &http.Transport{}
var resp *http.Response
var client *http.Client
defer func() {
if resp != nil && resp.Body != nil {
resp.Body.Close()
}
tr.CloseIdleConnections()
}()
client = &http.Client{Timeout: time.Millisecond * time.Duration(timeout), Transport: tr}
resp, err = client.Get(URL)
if err != nil {
return
}
return
}
func CloseConn(conn *net.Conn) {
defer func() {
_ = recover()
}()
if conn != nil && *conn != nil {
(*conn).SetDeadline(time.Now().Add(time.Millisecond))
(*conn).Close()
}
}
func Keygen() (err error) {
cmd := exec.Command("sh", "-c", "openssl genrsa -out proxy.key 2048")
out, err := cmd.CombinedOutput()
if err != nil {
log.Printf("err:%s", err)
return
}
fmt.Println(string(out))
cmd = exec.Command("sh", "-c", `openssl req -new -key proxy.key -x509 -days 3650 -out proxy.crt -subj /C=CN/ST=BJ/O="Localhost Ltd"/CN=proxy`)
out, err = cmd.CombinedOutput()
if err != nil {
log.Printf("err:%s", err)
return
}
fmt.Println(string(out))
return
}
func GetAllInterfaceAddr() ([]net.IP, error) {
ifaces, err := net.Interfaces()
if err != nil {
return nil, err
}
addresses := []net.IP{}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
// if iface.Flags&net.FlagLoopback != 0 {
// continue // loopback interface
// }
addrs, err := iface.Addrs()
if err != nil {
continue
}
for _, addr := range addrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
// if ip == nil || ip.IsLoopback() {
// continue
// }
ip = ip.To4()
if ip == nil {
continue // not an ipv4 address
}
addresses = append(addresses, ip)
}
}
if len(addresses) == 0 {
return nil, fmt.Errorf("no address Found, net.InterfaceAddrs: %v", addresses)
}
//only need first
return addresses, nil
}
func UDPPacket(srcAddr string, packet []byte) []byte {
addrBytes := []byte(srcAddr)
addrLength := uint16(len(addrBytes))
bodyLength := uint16(len(packet))
//log.Printf("build packet : addr len %d, body len %d", addrLength, bodyLength)
pkg := new(bytes.Buffer)
binary.Write(pkg, binary.LittleEndian, addrLength)
binary.Write(pkg, binary.LittleEndian, addrBytes)
binary.Write(pkg, binary.LittleEndian, bodyLength)
binary.Write(pkg, binary.LittleEndian, packet)
return pkg.Bytes()
}
func ReadUDPPacket(_reader io.Reader) (srcAddr string, packet []byte, err error) {
reader := bufio.NewReader(_reader)
var addrLength uint16
var bodyLength uint16
err = binary.Read(reader, binary.LittleEndian, &addrLength)
if err != nil {
return
}
_srcAddr := make([]byte, addrLength)
n, err := reader.Read(_srcAddr)
if err != nil {
return
}
if n != int(addrLength) {
err = fmt.Errorf("n != int(addrLength), %d,%d", n, addrLength)
return
}
srcAddr = string(_srcAddr)
err = binary.Read(reader, binary.LittleEndian, &bodyLength)
if err != nil {
return
}
packet = make([]byte, bodyLength)
n, err = reader.Read(packet)
if err != nil {
return
}
if n != int(bodyLength) {
err = fmt.Errorf("n != int(bodyLength), %d,%d", n, bodyLength)
return
}
return
}
func Uniqueid() string {
return xid.New().String()
// var src = rand.NewSource(time.Now().UnixNano())
// s := fmt.Sprintf("%d", src.Int63())
// return s[len(s)-5:len(s)-1] + fmt.Sprintf("%d", uint64(time.Now().UnixNano()))[8:]
}
func ReadData(r io.Reader) (data string, err error) {
var len uint16
err = binary.Read(r, binary.LittleEndian, &len)
if err != nil {
return
}
var n int
_data := make([]byte, len)
n, err = r.Read(_data)
if err != nil {
return
}
if n != int(len) {
err = fmt.Errorf("error data len")
return
}
data = string(_data)
return
}
func ReadPacketData(r io.Reader, data ...*string) (err error) {
for _, d := range data {
*d, err = ReadData(r)
if err != nil {
return
}
}
return
}
func ReadPacket(r io.Reader, typ *uint8, data ...*string) (err error) {
var connType uint8
err = binary.Read(r, binary.LittleEndian, &connType)
if err != nil {
return
}
*typ = connType
for _, d := range data {
*d, err = ReadData(r)
if err != nil {
return
}
}
return
}
func BuildPacket(typ uint8, data ...string) []byte {
pkg := new(bytes.Buffer)
binary.Write(pkg, binary.LittleEndian, typ)
for _, d := range data {
bytes := []byte(d)
binary.Write(pkg, binary.LittleEndian, uint16(len(bytes)))
binary.Write(pkg, binary.LittleEndian, bytes)
}
return pkg.Bytes()
}
func BuildPacketData(data ...string) []byte {
pkg := new(bytes.Buffer)
for _, d := range data {
bytes := []byte(d)
binary.Write(pkg, binary.LittleEndian, uint16(len(bytes)))
binary.Write(pkg, binary.LittleEndian, bytes)
}
return pkg.Bytes()
}
func SubStr(str string, start, end int) string {
if len(str) == 0 {
return ""
}
if end >= len(str) {
end = len(str) - 1
}
return str[start:end]
}
func SubBytes(bytes []byte, start, end int) []byte {
if len(bytes) == 0 {
return []byte{}
}
if end >= len(bytes) {
end = len(bytes) - 1
}
return bytes[start:end]
}
func TlsBytes(cert, key string) (certBytes, keyBytes []byte) {
certBytes, err := ioutil.ReadFile(cert)
if err != nil {
log.Fatalf("err : %s", err)
return
}
keyBytes, err = ioutil.ReadFile(key)
if err != nil {
log.Fatalf("err : %s", err)
return
}
return
}
func GetKCPBlock(method, key string) (block kcp.BlockCrypt) {
pass := pbkdf2.Key([]byte(key), []byte(key), 4096, 32, sha1.New)
switch method {
case "sm4":
block, _ = kcp.NewSM4BlockCrypt(pass[:16])
case "tea":
block, _ = kcp.NewTEABlockCrypt(pass[:16])
case "xor":
block, _ = kcp.NewSimpleXORBlockCrypt(pass)
case "none":
block, _ = kcp.NewNoneBlockCrypt(pass)
case "aes-128":
block, _ = kcp.NewAESBlockCrypt(pass[:16])
case "aes-192":
block, _ = kcp.NewAESBlockCrypt(pass[:24])
case "blowfish":
block, _ = kcp.NewBlowfishBlockCrypt(pass)
case "twofish":
block, _ = kcp.NewTwofishBlockCrypt(pass)
case "cast5":
block, _ = kcp.NewCast5BlockCrypt(pass[:16])
case "3des":
block, _ = kcp.NewTripleDESBlockCrypt(pass[:24])
case "xtea":
block, _ = kcp.NewXTEABlockCrypt(pass[:16])
case "salsa20":
block, _ = kcp.NewSalsa20BlockCrypt(pass)
default:
block, _ = kcp.NewAESBlockCrypt(pass)
}
return
}
func HttpGet(URL string, timeout int) (body []byte, code int, err error) {
var tr *http.Transport
var client *http.Client
conf := &tls.Config{
InsecureSkipVerify: true,
}
if strings.Contains(URL, "https://") {
tr = &http.Transport{TLSClientConfig: conf}
client = &http.Client{Timeout: time.Millisecond * time.Duration(timeout), Transport: tr}
} else {
tr = &http.Transport{}
client = &http.Client{Timeout: time.Millisecond * time.Duration(timeout), Transport: tr}
}
defer tr.CloseIdleConnections()
resp, err := client.Get(URL)
if err != nil {
return
}
defer resp.Body.Close()
code = resp.StatusCode
body, err = ioutil.ReadAll(resp.Body)
return
}
func IsIternalIP(domainOrIP string) bool {
var outIPs []net.IP
outIPs, err := net.LookupIP(domainOrIP)
if err != nil {
return false
}
for _, ip := range outIPs {
if ip.IsLoopback() {
return true
}
if ip.To4().Mask(net.IPv4Mask(255, 0, 0, 0)).String() == "10.0.0.0" {
return true
}
if ip.To4().Mask(net.IPv4Mask(255, 0, 0, 0)).String() == "192.168.0.0" {
return true
}
if ip.To4().Mask(net.IPv4Mask(255, 0, 0, 0)).String() == "172.0.0.0" {
i, _ := strconv.Atoi(strings.Split(ip.To4().String(), ".")[1])
return i >= 16 && i <= 31
}
}
return false
}
// type sockaddr struct {
// family uint16
// data [14]byte
// }
// const SO_ORIGINAL_DST = 80
// realServerAddress returns an intercepted connection's original destination.
// func realServerAddress(conn *net.Conn) (string, error) {
// tcpConn, ok := (*conn).(*net.TCPConn)
// if !ok {
// return "", errors.New("not a TCPConn")
// }
// file, err := tcpConn.File()
// if err != nil {
// return "", err
// }
// // To avoid potential problems from making the socket non-blocking.
// tcpConn.Close()
// *conn, err = net.FileConn(file)
// if err != nil {
// return "", err
// }
// defer file.Close()
// fd := file.Fd()
// var addr sockaddr
// size := uint32(unsafe.Sizeof(addr))
// err = getsockopt(int(fd), syscall.SOL_IP, SO_ORIGINAL_DST, uintptr(unsafe.Pointer(&addr)), &size)
// if err != nil {
// return "", err
// }
// var ip net.IP
// switch addr.family {
// case syscall.AF_INET:
// ip = addr.data[2:6]
// default:
// return "", errors.New("unrecognized address family")
// }
// port := int(addr.data[0])<<8 + int(addr.data[1])
// return net.JoinHostPort(ip.String(), strconv.Itoa(port)), nil
// }
// func getsockopt(s int, level int, name int, val uintptr, vallen *uint32) (err error) {
// _, _, e1 := syscall.Syscall6(syscall.SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
// if e1 != 0 {
// err = e1
// }
// return
// }