Chore: split component to transport

This commit is contained in:
Dreamacro
2021-05-13 22:18:49 +08:00
parent 3c54f99fea
commit f96ebab99f
57 changed files with 34 additions and 35 deletions

View File

@ -0,0 +1,9 @@
package obfs
type Base struct {
Host string
Port int
Key []byte
IVSize int
Param string
}

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@ -0,0 +1,9 @@
package obfs
func init() {
register("http_post", newHTTPPost, 0)
}
func newHTTPPost(b *Base) Obfs {
return &httpObfs{Base: b, post: true}
}

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@ -0,0 +1,407 @@
package obfs
import (
"bytes"
"encoding/hex"
"io"
"math/rand"
"net"
"strconv"
"strings"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/transport/ssr/tools"
)
func init() {
register("http_simple", newHTTPSimple, 0)
}
type httpObfs struct {
*Base
post bool
}
func newHTTPSimple(b *Base) Obfs {
return &httpObfs{Base: b}
}
type httpConn struct {
net.Conn
*httpObfs
hasSentHeader bool
hasRecvHeader bool
buf []byte
}
func (h *httpObfs) StreamConn(c net.Conn) net.Conn {
return &httpConn{Conn: c, httpObfs: h}
}
func (c *httpConn) Read(b []byte) (int, error) {
if c.buf != nil {
n := copy(b, c.buf)
if n == len(c.buf) {
c.buf = nil
} else {
c.buf = c.buf[n:]
}
return n, nil
}
if c.hasRecvHeader {
return c.Conn.Read(b)
}
buf := pool.Get(pool.RelayBufferSize)
defer pool.Put(buf)
n, err := c.Conn.Read(buf)
if err != nil {
return 0, err
}
pos := bytes.Index(buf[:n], []byte("\r\n\r\n"))
if pos == -1 {
return 0, io.EOF
}
c.hasRecvHeader = true
dataLength := n - pos - 4
n = copy(b, buf[4+pos:n])
if dataLength > n {
c.buf = append(c.buf, buf[4+pos+n:4+pos+dataLength]...)
}
return n, nil
}
func (c *httpConn) Write(b []byte) (int, error) {
if c.hasSentHeader {
return c.Conn.Write(b)
}
// 30: head length
headLength := c.IVSize + 30
bLength := len(b)
headDataLength := bLength
if bLength-headLength > 64 {
headDataLength = headLength + rand.Intn(65)
}
headData := b[:headDataLength]
b = b[headDataLength:]
var body string
host := c.Host
if len(c.Param) > 0 {
pos := strings.Index(c.Param, "#")
if pos != -1 {
body = strings.ReplaceAll(c.Param[pos+1:], "\n", "\r\n")
body = strings.ReplaceAll(body, "\\n", "\r\n")
host = c.Param[:pos]
} else {
host = c.Param
}
}
hosts := strings.Split(host, ",")
host = hosts[rand.Intn(len(hosts))]
buf := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(buf)
defer buf.Reset()
if c.post {
buf.WriteString("POST /")
} else {
buf.WriteString("GET /")
}
packURLEncodedHeadData(buf, headData)
buf.WriteString(" HTTP/1.1\r\nHost: " + host)
if c.Port != 80 {
buf.WriteString(":" + strconv.Itoa(c.Port))
}
buf.WriteString("\r\n")
if len(body) > 0 {
buf.WriteString(body + "\r\n\r\n")
} else {
buf.WriteString("User-Agent: ")
buf.WriteString(userAgent[rand.Intn(len(userAgent))])
buf.WriteString("\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\n")
if c.post {
packBoundary(buf)
}
buf.WriteString("DNT: 1\r\nConnection: keep-alive\r\n\r\n")
}
buf.Write(b)
_, err := c.Conn.Write(buf.Bytes())
if err != nil {
return 0, nil
}
c.hasSentHeader = true
return bLength, nil
}
func packURLEncodedHeadData(buf *bytes.Buffer, data []byte) {
dataLength := len(data)
for i := 0; i < dataLength; i++ {
buf.WriteRune('%')
buf.WriteString(hex.EncodeToString(data[i : i+1]))
}
}
func packBoundary(buf *bytes.Buffer) {
buf.WriteString("Content-Type: multipart/form-data; boundary=")
set := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
for i := 0; i < 32; i++ {
buf.WriteByte(set[rand.Intn(62)])
}
buf.WriteString("\r\n")
}
var userAgent = []string{
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.162 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36",
"Mozilla/5.0 (Linux; Android 7.0; Moto C Build/NRD90M.059) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36",
"Mozilla/5.0 (Linux; Android 6.0.1; SM-G532M Build/MMB29T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36",
"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36",
"Mozilla/5.0 (Linux; Android 5.1.1; SM-J120M Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36",
"Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36",
"Mozilla/5.0 (Linux; Android 7.0; Moto G (5) Build/NPPS25.137-93-14) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36",
"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36",
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}

View File

@ -0,0 +1,42 @@
package obfs
import (
"errors"
"fmt"
"net"
)
var (
errTLS12TicketAuthIncorrectMagicNumber = errors.New("tls1.2_ticket_auth incorrect magic number")
errTLS12TicketAuthTooShortData = errors.New("tls1.2_ticket_auth too short data")
errTLS12TicketAuthHMACError = errors.New("tls1.2_ticket_auth hmac verifying failed")
)
type authData struct {
clientID [32]byte
}
type Obfs interface {
StreamConn(net.Conn) net.Conn
}
type obfsCreator func(b *Base) Obfs
var obfsList = make(map[string]struct {
overhead int
new obfsCreator
})
func register(name string, c obfsCreator, o int) {
obfsList[name] = struct {
overhead int
new obfsCreator
}{overhead: o, new: c}
}
func PickObfs(name string, b *Base) (Obfs, int, error) {
if choice, ok := obfsList[name]; ok {
return choice.new(b), choice.overhead, nil
}
return nil, 0, fmt.Errorf("Obfs %s not supported", name)
}

View File

@ -0,0 +1,15 @@
package obfs
import "net"
type plain struct{}
func init() {
register("plain", newPlain, 0)
}
func newPlain(b *Base) Obfs {
return &plain{}
}
func (p *plain) StreamConn(c net.Conn) net.Conn { return c }

View File

@ -0,0 +1,71 @@
package obfs
import (
"encoding/binary"
"hash/crc32"
"math/rand"
"net"
"github.com/Dreamacro/clash/common/pool"
)
func init() {
register("random_head", newRandomHead, 0)
}
type randomHead struct {
*Base
}
func newRandomHead(b *Base) Obfs {
return &randomHead{Base: b}
}
type randomHeadConn struct {
net.Conn
*randomHead
hasSentHeader bool
rawTransSent bool
rawTransRecv bool
buf []byte
}
func (r *randomHead) StreamConn(c net.Conn) net.Conn {
return &randomHeadConn{Conn: c, randomHead: r}
}
func (c *randomHeadConn) Read(b []byte) (int, error) {
if c.rawTransRecv {
return c.Conn.Read(b)
}
buf := pool.Get(pool.RelayBufferSize)
defer pool.Put(buf)
c.Conn.Read(buf)
c.rawTransRecv = true
c.Write(nil)
return 0, nil
}
func (c *randomHeadConn) Write(b []byte) (int, error) {
if c.rawTransSent {
return c.Conn.Write(b)
}
c.buf = append(c.buf, b...)
if !c.hasSentHeader {
c.hasSentHeader = true
dataLength := rand.Intn(96) + 4
buf := pool.Get(dataLength + 4)
defer pool.Put(buf)
rand.Read(buf[:dataLength])
binary.LittleEndian.PutUint32(buf[dataLength:], 0xffffffff-crc32.ChecksumIEEE(buf[:dataLength]))
_, err := c.Conn.Write(buf)
return len(b), err
}
if c.rawTransRecv {
_, err := c.Conn.Write(c.buf)
c.buf = nil
c.rawTransSent = true
return len(b), err
}
return len(b), nil
}

View File

@ -0,0 +1,231 @@
package obfs
import (
"bytes"
"crypto/hmac"
"encoding/binary"
"math/rand"
"net"
"strings"
"time"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/transport/ssr/tools"
)
func init() {
register("tls1.2_ticket_auth", newTLS12Ticket, 5)
register("tls1.2_ticket_fastauth", newTLS12Ticket, 5)
}
type tls12Ticket struct {
*Base
*authData
}
func newTLS12Ticket(b *Base) Obfs {
r := &tls12Ticket{Base: b, authData: &authData{}}
rand.Read(r.clientID[:])
return r
}
type tls12TicketConn struct {
net.Conn
*tls12Ticket
handshakeStatus int
decoded bytes.Buffer
underDecoded bytes.Buffer
sendBuf bytes.Buffer
}
func (t *tls12Ticket) StreamConn(c net.Conn) net.Conn {
return &tls12TicketConn{Conn: c, tls12Ticket: t}
}
func (c *tls12TicketConn) Read(b []byte) (int, error) {
if c.decoded.Len() > 0 {
return c.decoded.Read(b)
}
buf := pool.Get(pool.RelayBufferSize)
defer pool.Put(buf)
n, err := c.Conn.Read(buf)
if err != nil {
return 0, err
}
if c.handshakeStatus == 8 {
c.underDecoded.Write(buf[:n])
for c.underDecoded.Len() > 5 {
if !bytes.Equal(c.underDecoded.Bytes()[:3], []byte{0x17, 3, 3}) {
c.underDecoded.Reset()
return 0, errTLS12TicketAuthIncorrectMagicNumber
}
size := int(binary.BigEndian.Uint16(c.underDecoded.Bytes()[3:5]))
if c.underDecoded.Len() < 5+size {
break
}
c.underDecoded.Next(5)
c.decoded.Write(c.underDecoded.Next(size))
}
n, _ = c.decoded.Read(b)
return n, nil
}
if n < 11+32+1+32 {
return 0, errTLS12TicketAuthTooShortData
}
if !hmac.Equal(buf[33:43], c.hmacSHA1(buf[11:33])[:10]) || !hmac.Equal(buf[n-10:n], c.hmacSHA1(buf[:n-10])[:10]) {
return 0, errTLS12TicketAuthHMACError
}
c.Write(nil)
return 0, nil
}
func (c *tls12TicketConn) Write(b []byte) (int, error) {
length := len(b)
if c.handshakeStatus == 8 {
buf := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(buf)
defer buf.Reset()
for len(b) > 2048 {
size := rand.Intn(4096) + 100
if len(b) < size {
size = len(b)
}
packData(buf, b[:size])
b = b[size:]
}
if len(b) > 0 {
packData(buf, b)
}
_, err := c.Conn.Write(buf.Bytes())
if err != nil {
return 0, err
}
return length, nil
}
if len(b) > 0 {
packData(&c.sendBuf, b)
}
if c.handshakeStatus == 0 {
c.handshakeStatus = 1
data := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(data)
defer data.Reset()
data.Write([]byte{3, 3})
c.packAuthData(data)
data.WriteByte(0x20)
data.Write(c.clientID[:])
data.Write([]byte{0x00, 0x1c, 0xc0, 0x2b, 0xc0, 0x2f, 0xcc, 0xa9, 0xcc, 0xa8, 0xcc, 0x14, 0xcc, 0x13, 0xc0, 0x0a, 0xc0, 0x14, 0xc0, 0x09, 0xc0, 0x13, 0x00, 0x9c, 0x00, 0x35, 0x00, 0x2f, 0x00, 0x0a})
data.Write([]byte{0x1, 0x0})
ext := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(ext)
defer ext.Reset()
host := c.getHost()
ext.Write([]byte{0xff, 0x01, 0x00, 0x01, 0x00})
packSNIData(ext, host)
ext.Write([]byte{0, 0x17, 0, 0})
c.packTicketBuf(ext, host)
ext.Write([]byte{0x00, 0x0d, 0x00, 0x16, 0x00, 0x14, 0x06, 0x01, 0x06, 0x03, 0x05, 0x01, 0x05, 0x03, 0x04, 0x01, 0x04, 0x03, 0x03, 0x01, 0x03, 0x03, 0x02, 0x01, 0x02, 0x03})
ext.Write([]byte{0x00, 0x05, 0x00, 0x05, 0x01, 0x00, 0x00, 0x00, 0x00})
ext.Write([]byte{0x00, 0x12, 0x00, 0x00})
ext.Write([]byte{0x75, 0x50, 0x00, 0x00})
ext.Write([]byte{0x00, 0x0b, 0x00, 0x02, 0x01, 0x00})
ext.Write([]byte{0x00, 0x0a, 0x00, 0x06, 0x00, 0x04, 0x00, 0x17, 0x00, 0x18})
binary.Write(data, binary.BigEndian, uint16(ext.Len()))
data.ReadFrom(ext)
ret := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(ret)
defer ret.Reset()
ret.Write([]byte{0x16, 3, 1})
binary.Write(ret, binary.BigEndian, uint16(data.Len()+4))
ret.Write([]byte{1, 0})
binary.Write(ret, binary.BigEndian, uint16(data.Len()))
ret.ReadFrom(data)
_, err := c.Conn.Write(ret.Bytes())
if err != nil {
return 0, err
}
return length, nil
} else if c.handshakeStatus == 1 && len(b) == 0 {
buf := tools.BufPool.Get().(*bytes.Buffer)
defer tools.BufPool.Put(buf)
defer buf.Reset()
buf.Write([]byte{0x14, 3, 3, 0, 1, 1, 0x16, 3, 3, 0, 0x20})
tools.AppendRandBytes(buf, 22)
buf.Write(c.hmacSHA1(buf.Bytes())[:10])
buf.ReadFrom(&c.sendBuf)
c.handshakeStatus = 8
_, err := c.Conn.Write(buf.Bytes())
return 0, err
}
return length, nil
}
func packData(buf *bytes.Buffer, data []byte) {
buf.Write([]byte{0x17, 3, 3})
binary.Write(buf, binary.BigEndian, uint16(len(data)))
buf.Write(data)
}
func (t *tls12Ticket) packAuthData(buf *bytes.Buffer) {
binary.Write(buf, binary.BigEndian, uint32(time.Now().Unix()))
tools.AppendRandBytes(buf, 18)
buf.Write(t.hmacSHA1(buf.Bytes()[buf.Len()-22:])[:10])
}
func packSNIData(buf *bytes.Buffer, u string) {
len := uint16(len(u))
buf.Write([]byte{0, 0})
binary.Write(buf, binary.BigEndian, len+5)
binary.Write(buf, binary.BigEndian, len+3)
buf.WriteByte(0)
binary.Write(buf, binary.BigEndian, len)
buf.WriteString(u)
}
func (c *tls12TicketConn) packTicketBuf(buf *bytes.Buffer, u string) {
length := 16 * (rand.Intn(17) + 8)
buf.Write([]byte{0, 0x23})
binary.Write(buf, binary.BigEndian, uint16(length))
tools.AppendRandBytes(buf, length)
}
func (t *tls12Ticket) hmacSHA1(data []byte) []byte {
key := pool.Get(len(t.Key) + 32)
defer pool.Put(key)
copy(key, t.Key)
copy(key[len(t.Key):], t.clientID[:])
sha1Data := tools.HmacSHA1(key, data)
return sha1Data[:10]
}
func (t *tls12Ticket) getHost() string {
host := t.Param
if len(host) == 0 {
host = t.Host
}
if len(host) > 0 && host[len(host)-1] >= '0' && host[len(host)-1] <= '9' {
host = ""
}
hosts := strings.Split(host, ",")
host = hosts[rand.Intn(len(hosts))]
return host
}