README.md

@@ -6,7 +6,7 @@
 [![Actions Status](https://img.shields.io/github/actions/workflow/status/nadoo/glider/build.yml?branch=dev&style=flat-square)](https://github.com/nadoo/glider/actions)
 [![DockerHub](https://img.shields.io/docker/image-size/nadoo/glider?color=blue&label=docker&style=flat-square)](https://hub.docker.com/r/nadoo/glider)
 
-glider is a forward proxy with multiple protocols support, and also a dns/dhcp server with ipset management features.
+glider is a forward proxy with multiple protocols support, and also a dns/dhcp server with ipset management features(like dnsmasq).
 
 we can set up local listeners as proxy servers, and forward requests to internet via forwarders.
 
@@ -52,12 +52,13 @@ we can set up local listeners as proxy servers, and forward requests to internet
 |HTTP           |√| |√| |client & server
 |SOCKS5         |√|√|√|√|client & server
 |SS             |√|√|√|√|client & server
-|Trojan         |√| |√|√|client & server
+|Trojan         |√|√|√|√|client & server
-|Trojanc        |√| |√|√|trojan cleartext(without tls)
+|Trojanc        |√|√|√|√|trojan cleartext(without tls)
-|AnyTLS         |√| |√|√|client & server
+|AnyTLS         |√| |√| |client & server
-|AnyTLSc        |√| |√|√|anytls cleartext(without tls)
+|AnyTLSc        |√| |√| |anytls cleartext(without tls)
-|VLESS          |√| |√|√|client & server
+|VLESS          |√|√|√|√|client & server
 |VMess          | | |√|√|client only
+|SSR            | | |√| |client only
 |SSH            | | |√| |client only
 |SOCKS4         | | |√| |client only
 |SOCKS4A        | | |√| |client only
@@ -119,7 +120,7 @@ OPTION:
   -checkdisabledonly
         check disabled fowarders only
   -checkinterval int
-        fowarder check interval(seconds) (default 30)ß
+        fowarder check interval(seconds) (default 30)
   -checklatencysamples int
         use the average latency of the latest N checks (default 10)
   -checktimeout int
@@ -199,7 +200,7 @@ URL:
 
 SCHEME:
    listen : anytls anytlsc http kcp mixed pxyproto redir redir6 smux sni socks5 ss tcp tls tproxy trojan trojanc udp unix vless vsock ws wss
-   forward: anytls anytlsc direct http kcp reject simple-obfs smux socks4 socks4a socks5 ss ssh tcp tls trojan trojanc udp unix vless vmess vsock ws wss
+   forward: anytls anytlsc direct http kcp reject simple-obfs smux socks4 socks4a socks5 ss ssh ssr tcp tls trojan trojanc udp unix vless vmess vsock ws wss
 
    Note: use 'glider -scheme all' or 'glider -scheme SCHEME' to see help info for the scheme.
 
@@ -303,6 +304,10 @@ SSH scheme:
   ssh://user[:pass]@host:port[?key=keypath&timeout=SECONDS]
     timeout: timeout of ssh handshake and channel operation, default: 5
 
+--
+SSR scheme:
+  ssr://method:pass@host:port?protocol=xxx&protocol_param=yyy&obfs=zzz&obfs_param=xyz
+
 --
 TLS client scheme:
   tls://host:port[?serverName=SERVERNAME][&skipVerify=true][&cert=PATH][&alpn=proto1][&alpn=proto2]

config/glider.conf.example

@@ -115,6 +115,9 @@ listen=127.0.0.1:8443
 # SS proxy as forwarder
 # forward=ss://method:pass@1.1.1.1:8443
 
+# SSR proxy as forwarder
+# forward=ssr://method:pass@1.1.1.1:8443?protocol=auth_aes128_md5&protocol_param=xxx&obfs=tls1.2_ticket_auth&obfs_param=yyy
+
 # ssh forwarder
 # forward=ssh://user[:pass]@host:port[?key=keypath&timeout=SECONDS]
 # forward=ssh://root:pass@host:port

feature.go

@@ -17,6 +17,7 @@ import (
 	_ "github.com/nadoo/glider/proxy/socks5"
 	_ "github.com/nadoo/glider/proxy/ss"
 	_ "github.com/nadoo/glider/proxy/ssh"
+	_ "github.com/nadoo/glider/proxy/ssr"
 	_ "github.com/nadoo/glider/proxy/tcp"
 	_ "github.com/nadoo/glider/proxy/tls"
 	_ "github.com/nadoo/glider/proxy/trojan"

go.mod

@@ -4,6 +4,9 @@ go 1.26
 
 require (
 	github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da
+	github.com/dgryski/go-camellia v0.0.0-20191119043421-69a8a13fb23d
+	github.com/dgryski/go-idea v0.0.0-20170306091226-d2fb45a411fb
+	github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152
 	github.com/insomniacslk/dhcp v0.0.0-20260603135910-a415979eb11e
 	github.com/nadoo/conflag v0.3.1
 	github.com/nadoo/ipset v0.5.0
@@ -13,6 +16,7 @@ require (
 )
 
 require (
+	github.com/ebfe/rc2 v0.0.0-20131011165748-24b9757f5521 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/klauspost/reedsolomon v1.14.1 // indirect
 	github.com/pierrec/lz4/v4 v4.1.27 // indirect

go.sum

@@ -7,6 +7,14 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-camellia v0.0.0-20191119043421-69a8a13fb23d h1:CPqTNIigGweVPT4CYb+OO2E6XyRKFOmvTHwWRLgCAlE=
+github.com/dgryski/go-camellia v0.0.0-20191119043421-69a8a13fb23d/go.mod h1:QX5ZVULjAfZJux/W62Y91HvCh9hyW6enAwcrrv/sLj0=
+github.com/dgryski/go-idea v0.0.0-20170306091226-d2fb45a411fb h1:zXpN5126w/mhECTkqazBkrOJIMatbPP71aSIDR5UuW4=
+github.com/dgryski/go-idea v0.0.0-20170306091226-d2fb45a411fb/go.mod h1:F7WkpqJj9t98ePxB/WJGQTIDeOVPuSJ3qdn6JUjg170=
+github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152 h1:ED31mPIxDJnrLt9W9dH5xgd/6KjzEACKHBVGQ33czc0=
+github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152/go.mod h1:I9fhc/EvSg88cDxmfQ47v35Ssz9rlFunL/KY0A1JAYI=
+github.com/ebfe/rc2 v0.0.0-20131011165748-24b9757f5521 h1:fBHFH+Y/GPGFGo7LIrErQc3p2MeAhoIQNgaxPWYsSxk=
+github.com/ebfe/rc2 v0.0.0-20131011165748-24b9757f5521/go.mod h1:ucvhdsUCE3TH0LoLRb6ShHiJl8e39dGlx6A4g/ujlow=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=

proxy/anytls/client.go

@@ -64,42 +64,7 @@ func (s *AnyTLS) Dial(network, addr string) (net.Conn, error) {
 }
 
 func (s *AnyTLS) DialUDP(network, addr string) (net.PacketConn, error) {
-	if network != "udp" && network != "udp4" && network != "udp6" {
+	return nil, proxy.ErrNotSupported
-		return nil, proxy.ErrNotSupported
-	}
-	target := socks.ParseAddr(addr)
-	if target == nil {
-		return nil, fmt.Errorf("[anytls] invalid target address: %s", addr)
-	}
-	raw := socks.ParseAddr(net.JoinHostPort(uotV2MagicHost, "0"))
-	if raw == nil {
-		return nil, fmt.Errorf("[anytls] invalid udp-over-tcp target address")
-	}
-	ss, err := s.newClientSession()
-	if err != nil {
-		return nil, err
-	}
-	st, err := ss.openStream()
-	if err != nil {
-		_ = ss.Close()
-		return nil, err
-	}
-	if _, err := st.Write(raw); err != nil {
-		_ = st.Close()
-		_ = ss.Close()
-		return nil, err
-	}
-	if err := writeUOTV2Request(st, target); err != nil {
-		_ = st.Close()
-		_ = ss.Close()
-		return nil, err
-	}
-	if err := ss.waitSYNACK(st.id, s.synackTimeout); err != nil {
-		_ = st.Close()
-		_ = ss.Close()
-		return nil, err
-	}
-	return &clientPacketConn{PacketConn: newUOTPacketConn(st, target), session: ss}, nil
 }
 
 func (s *AnyTLS) newClientSession() (*session, error) {
@@ -140,14 +105,3 @@ func (c *clientConn) Close() error {
 	_ = c.session.Close()
 	return err
 }
-
-type clientPacketConn struct {
-	net.PacketConn
-	session *session
-}
-
-func (c *clientPacketConn) Close() error {
-	err := c.PacketConn.Close()
-	_ = c.session.Close()
-	return err
-}

proxy/anytls/packet.go

@@ -1,95 +0,0 @@
-package anytls
-
-import (
-	"encoding/binary"
-	"errors"
-	"io"
-	"net"
-	"time"
-
-	"github.com/nadoo/glider/pkg/pool"
-	"github.com/nadoo/glider/pkg/socks"
-)
-
-const uotV2MagicHost = "sp.v2.udp-over-tcp.arpa"
-
-// uotPacketConn carries UDP packets over an AnyTLS stream using sing-box
-// udp-over-tcp v2 connect format.
-type uotPacketConn struct {
-	net.Conn
-	target socks.Addr
-}
-
-func newUOTPacketConn(c net.Conn, target socks.Addr) *uotPacketConn {
-	return &uotPacketConn{Conn: c, target: target}
-}
-
-func (pc *uotPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
-	if len(b) < 2 {
-		return 0, pc.target, errors.New("buf size is not enough")
-	}
-
-	if _, err := io.ReadFull(pc.Conn, b[:2]); err != nil {
-		return 0, pc.target, err
-	}
-	length := int(binary.BigEndian.Uint16(b[:2]))
-	if len(b) < length {
-		return 0, pc.target, errors.New("buf size is not enough")
-	}
-
-	n, err := io.ReadFull(pc.Conn, b[:length])
-	return n, pc.target, err
-}
-
-func (pc *uotPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
-	buf := pool.GetBytesBuffer()
-	defer pool.PutBytesBuffer(buf)
-
-	var head [2]byte
-	binary.BigEndian.PutUint16(head[:], uint16(len(b)))
-	buf.Write(head[:])
-	buf.Write(b)
-
-	n, err := pc.Write(buf.Bytes())
-	if n > 2 {
-		return n - 2, err
-	}
-	return 0, err
-}
-
-func (pc *uotPacketConn) SetDeadline(t time.Time) error {
-	return pc.Conn.SetDeadline(t)
-}
-
-func (pc *uotPacketConn) SetReadDeadline(t time.Time) error {
-	return pc.Conn.SetReadDeadline(t)
-}
-
-func (pc *uotPacketConn) SetWriteDeadline(t time.Time) error {
-	return pc.Conn.SetWriteDeadline(t)
-}
-
-func writeUOTV2Request(w io.Writer, target socks.Addr) error {
-	if target == nil {
-		return errors.New("invalid target address")
-	}
-
-	buf := pool.GetBytesBuffer()
-	defer pool.PutBytesBuffer(buf)
-
-	buf.WriteByte(1) // connect stream format
-	buf.Write(target)
-	_, err := w.Write(buf.Bytes())
-	return err
-}
-
-func readUOTV2Request(r io.Reader) (socks.Addr, error) {
-	var connect [1]byte
-	if _, err := io.ReadFull(r, connect[:]); err != nil {
-		return nil, err
-	}
-	if connect[0] != 1 {
-		return nil, errors.New("udp-over-tcp v2 non-connect format is not supported")
-	}
-	return socks.ReadAddr(r)
-}

proxy/anytls/server.go

@@ -8,7 +8,6 @@ import (
 	"io"
 	"net"
 	"strings"
-	"time"
 
 	"github.com/nadoo/glider/pkg/log"
 	"github.com/nadoo/glider/pkg/socks"
@@ -128,11 +127,6 @@ func (s *AnyTLS) serveStream(ss *session, st *stream) {
 		log.F("[anytls] read target error: %v", err)
 		return
 	}
-	host, _, err := net.SplitHostPort(target.String())
-	if err == nil && host == uotV2MagicHost {
-		s.serveUoT(ss, st)
-		return
-	}
 
 	rc, dialer, err := s.proxy.Dial("tcp", target.String())
 	if err != nil {
@@ -151,32 +145,3 @@ func (s *AnyTLS) serveStream(ss *session, st *stream) {
 		}
 	}
 }
-
-func (s *AnyTLS) serveUoT(ss *session, st *stream) {
-	target, err := readUOTV2Request(st)
-	if err != nil {
-		_ = ss.writeFrame(frame{command: cmdSYNACK, streamID: st.id, data: []byte(err.Error())})
-		log.F("[anytls] read udp-over-tcp request error: %v", err)
-		return
-	}
-
-	dstPC, dialer, err := s.proxy.DialUDP("udp", target.String())
-	if err != nil {
-		_ = ss.writeFrame(frame{command: cmdSYNACK, streamID: st.id, data: []byte(err.Error())})
-		log.F("[anytls] %s <-UoT-> %s via %s, error in dial: %v", st.RemoteAddr(), target, dialer.Addr(), err)
-		return
-	}
-	defer dstPC.Close()
-
-	_ = ss.writeFrame(frame{command: cmdSYNACK, streamID: st.id})
-	pc := newUOTPacketConn(st, target)
-	log.F("[anytls] %s <-UoT-> %s via %s", st.RemoteAddr(), target, dialer.Addr())
-
-	go proxy.CopyUDP(dstPC, nil, pc, 2*time.Minute, 5*time.Second)
-	if err := proxy.CopyUDP(pc, nil, dstPC, 2*time.Minute, 5*time.Second); err != nil {
-		log.F("[anytls] %s <-UoT-> %s via %s, relay error: %v", st.RemoteAddr(), target, dialer.Addr(), err)
-		if d, ok := dialer.(proxy.Dialer); ok && !strings.Contains(err.Error(), s.addr) {
-			s.proxy.Record(d, false)
-		}
-	}
-}

proxy/ssr/internal/cipher/cipher.go

@@ -0,0 +1,342 @@
+package cipher
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/des"
+	"crypto/md5"
+	"crypto/rand"
+	"crypto/rc4"
+	"encoding/binary"
+	"errors"
+
+	"github.com/aead/chacha20"
+	"github.com/dgryski/go-camellia"
+	"github.com/dgryski/go-idea"
+	"github.com/dgryski/go-rc2"
+	"golang.org/x/crypto/blowfish"
+	"golang.org/x/crypto/cast5"
+	"golang.org/x/crypto/salsa20/salsa"
+
+	"github.com/nadoo/glider/pkg/pool"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+var errEmptyPassword = errors.New("empty key")
+
+type DecOrEnc int
+
+const (
+	Decrypt DecOrEnc = iota
+	Encrypt
+)
+
+func newCTRStream(block cipher.Block, err error, key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	if err != nil {
+		return nil, err
+	}
+	return cipher.NewCTR(block, iv), nil
+}
+
+func newAESCTRStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := aes.NewCipher(key)
+	return newCTRStream(block, err, key, iv, doe)
+}
+
+func newOFBStream(block cipher.Block, err error, key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	if err != nil {
+		return nil, err
+	}
+	return cipher.NewCTR(block, iv), nil
+}
+
+func newAESOFBStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := aes.NewCipher(key)
+	return newOFBStream(block, err, key, iv, doe)
+}
+
+func newCFBStream(block cipher.Block, err error, key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	if err != nil {
+		return nil, err
+	}
+	if doe == Encrypt {
+		return cipher.NewCFBEncrypter(block, iv), nil
+	} else {
+		return cipher.NewCFBDecrypter(block, iv), nil
+	}
+}
+
+func newAESCFBStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := aes.NewCipher(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newDESStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := des.NewCipher(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newBlowFishStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := blowfish.NewCipher(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newCast5Stream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := cast5.NewCipher(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newRC4MD5Stream(key, iv []byte, _ DecOrEnc) (cipher.Stream, error) {
+	h := md5.New()
+	h.Write(key)
+	h.Write(iv)
+	rc4key := h.Sum(nil)
+
+	return rc4.NewCipher(rc4key)
+}
+
+func newChaCha20Stream(key, iv []byte, _ DecOrEnc) (cipher.Stream, error) {
+	return chacha20.NewCipher(iv, key)
+}
+
+func newChacha20IETFStream(key, iv []byte, _ DecOrEnc) (cipher.Stream, error) {
+	return chacha20.NewCipher(iv, key)
+}
+
+type salsaStreamCipher struct {
+	nonce   [8]byte
+	key     [32]byte
+	counter int
+}
+
+func (c *salsaStreamCipher) XORKeyStream(dst, src []byte) {
+	var buf []byte
+	padLen := c.counter % 64
+	dataSize := len(src) + padLen
+	if cap(dst) >= dataSize {
+		buf = dst[:dataSize]
+		// nadoo: comment out codes here to use pool buffer
+		// modify start -->
+		// } else if leakybuf.GlobalLeakyBufSize >= dataSize {
+		// 	buf = leakybuf.GlobalLeakyBuf.Get()
+		// 	defer leakybuf.GlobalLeakyBuf.Put(buf)
+		// 	buf = buf[:dataSize]
+		// } else {
+		// 	buf = make([]byte, dataSize)
+		// }
+	} else {
+		buf = pool.GetBuffer(dataSize)
+		defer pool.PutBuffer(buf)
+	}
+	// --> modify end
+
+	var subNonce [16]byte
+	copy(subNonce[:], c.nonce[:])
+	binary.LittleEndian.PutUint64(subNonce[len(c.nonce):], uint64(c.counter/64))
+
+	// It's difficult to avoid data copy here. src or dst maybe slice from
+	// Conn.Read/Write, which can't have padding.
+	copy(buf[padLen:], src[:])
+	salsa.XORKeyStream(buf, buf, &subNonce, &c.key)
+	copy(dst, buf[padLen:])
+
+	c.counter += len(src)
+}
+
+func newSalsa20Stream(key, iv []byte, _ DecOrEnc) (cipher.Stream, error) {
+	var c salsaStreamCipher
+	copy(c.nonce[:], iv[:8])
+	copy(c.key[:], key[:32])
+	return &c, nil
+}
+
+func newCamelliaStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := camellia.New(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newIdeaStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := idea.NewCipher(key)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newRC2Stream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	block, err := rc2.New(key, 16)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+func newRC4Stream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	return rc4.NewCipher(key)
+}
+
+func newSeedStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	// TODO: SEED block cipher implementation is required
+	block, err := rc2.New(key, 16)
+	return newCFBStream(block, err, key, iv, doe)
+}
+
+type NoneStream struct {
+	cipher.Stream
+}
+
+func (*NoneStream) XORKeyStream(dst, src []byte) {
+	copy(dst, src)
+}
+
+func newNoneStream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
+	return new(NoneStream), nil
+}
+
+type cipherInfo struct {
+	keyLen    int
+	ivLen     int
+	newStream func(key, iv []byte, doe DecOrEnc) (cipher.Stream, error)
+}
+
+var streamCipherMethod = map[string]*cipherInfo{
+	"aes-128-cfb":      {16, 16, newAESCFBStream},
+	"aes-192-cfb":      {24, 16, newAESCFBStream},
+	"aes-256-cfb":      {32, 16, newAESCFBStream},
+	"aes-128-ctr":      {16, 16, newAESCTRStream},
+	"aes-192-ctr":      {24, 16, newAESCTRStream},
+	"aes-256-ctr":      {32, 16, newAESCTRStream},
+	"aes-128-ofb":      {16, 16, newAESOFBStream},
+	"aes-192-ofb":      {24, 16, newAESOFBStream},
+	"aes-256-ofb":      {32, 16, newAESOFBStream},
+	"des-cfb":          {8, 8, newDESStream},
+	"bf-cfb":           {16, 8, newBlowFishStream},
+	"cast5-cfb":        {16, 8, newCast5Stream},
+	"rc4-md5":          {16, 16, newRC4MD5Stream},
+	"rc4-md5-6":        {16, 6, newRC4MD5Stream},
+	"chacha20":         {32, 8, newChaCha20Stream},
+	"chacha20-ietf":    {32, 12, newChacha20IETFStream},
+	"salsa20":          {32, 8, newSalsa20Stream},
+	"camellia-128-cfb": {16, 16, newCamelliaStream},
+	"camellia-192-cfb": {24, 16, newCamelliaStream},
+	"camellia-256-cfb": {32, 16, newCamelliaStream},
+	"idea-cfb":         {16, 8, newIdeaStream},
+	"rc2-cfb":          {16, 8, newRC2Stream},
+	"seed-cfb":         {16, 8, newSeedStream},
+	"rc4":              {16, 0, newRC4Stream},
+	"none":             {16, 0, newNoneStream},
+}
+
+func CheckCipherMethod(method string) error {
+	if method == "" {
+		method = "rc4-md5"
+	}
+	_, ok := streamCipherMethod[method]
+	if !ok {
+		return errors.New("Unsupported encryption method: " + method)
+	}
+	return nil
+}
+
+type StreamCipher struct {
+	enc  cipher.Stream
+	dec  cipher.Stream
+	key  []byte
+	info *cipherInfo
+	iv   []byte
+}
+
+// NewStreamCipher creates a cipher that can be used in Dial() etc.
+// Use cipher.Copy() to create a new cipher with the same method and password
+// to avoid the cost of repeated cipher initialization.
+func NewStreamCipher(method, password string) (c *StreamCipher, err error) {
+	if password == "" {
+		return nil, errEmptyPassword
+	}
+	if method == "" {
+		method = "rc4-md5"
+	}
+	mi, ok := streamCipherMethod[method]
+	if !ok {
+		return nil, errors.New("Unsupported encryption method: " + method)
+	}
+
+	key := tools.EVPBytesToKey(password, mi.keyLen)
+
+	c = &StreamCipher{key: key, info: mi}
+
+	return c, nil
+}
+
+func (c *StreamCipher) EncryptInited() bool {
+	return c.enc != nil
+}
+
+func (c *StreamCipher) DecryptInited() bool {
+	return c.dec != nil
+}
+
+// Initializes the block cipher with CFB mode, returns IV.
+func (c *StreamCipher) InitEncrypt() (iv []byte, err error) {
+	if c.iv == nil {
+		iv = make([]byte, c.info.ivLen)
+		rand.Read(iv)
+		c.iv = iv
+	} else {
+		iv = c.iv
+	}
+	c.enc, err = c.info.newStream(c.key, iv, Encrypt)
+	return
+}
+
+func (c *StreamCipher) InitDecrypt(iv []byte) (err error) {
+	c.dec, err = c.info.newStream(c.key, iv, Decrypt)
+	return
+}
+
+func (c *StreamCipher) Encrypt(dst, src []byte) {
+	c.enc.XORKeyStream(dst, src)
+}
+
+func (c *StreamCipher) Decrypt(dst, src []byte) {
+	c.dec.XORKeyStream(dst, src)
+}
+
+// Copy creates a new cipher at it's initial state.
+func (c *StreamCipher) Copy() *StreamCipher {
+	// This optimization maybe not necessary. But without this function, we
+	// need to maintain a table cache for newTableCipher and use lock to
+	// protect concurrent access to that cache.
+
+	// AES and DES ciphers does not return specific types, so it's difficult
+	// to create copy. But their initialization time is less than 4000ns on my
+	// 2.26 GHz Intel Core 2 Duo processor. So no need to worry.
+
+	// Currently, blow-fish and cast5 initialization cost is an order of
+	// magnitude slower than other ciphers. (I'm not sure whether this is
+	// because the current implementation is not highly optimized, or this is
+	// the nature of the algorithm.)
+
+	nc := *c
+	nc.enc = nil
+	nc.dec = nil
+	return &nc
+}
+
+func (c *StreamCipher) Key() []byte {
+	return c.key
+}
+
+func (c *StreamCipher) IV() []byte {
+	return c.iv
+}
+
+func (c *StreamCipher) SetIV(iv []byte) {
+	c.iv = iv
+}
+
+func (c *StreamCipher) SetKey(key []byte) {
+	c.key = key
+}
+
+func (c *StreamCipher) InfoIVLen() int {
+	return c.info.ivLen
+}
+
+func (c *StreamCipher) InfoKeyLen() int {
+	return c.info.keyLen
+}

proxy/ssr/internal/client.go

@@ -0,0 +1,228 @@
+// source code from https://github.com/v2rayA/shadowsocksR
+// Just copy here to use glider's builtin buffer pool.
+// As this protocol hasn't been maintained since 2017, it doesn't deserve our research to rewrite it.
+
+package internal
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"net"
+
+	"github.com/nadoo/glider/pkg/pool"
+	"github.com/nadoo/glider/proxy"
+	"github.com/nadoo/glider/proxy/ssr/internal/cipher"
+	"github.com/nadoo/glider/proxy/ssr/internal/obfs"
+	"github.com/nadoo/glider/proxy/ssr/internal/protocol"
+)
+
+var bufSize = proxy.TCPBufSize
+
+// SSTCPConn the struct that override the net.Conn methods
+type SSTCPConn struct {
+	net.Conn
+	*cipher.StreamCipher
+	IObfs               obfs.IObfs
+	IProtocol           protocol.IProtocol
+	readBuf             []byte
+	underPostdecryptBuf *bytes.Buffer
+	readIndex           uint64
+	decryptedBuf        *bytes.Buffer
+	writeBuf            []byte
+	lastReadError       error
+}
+
+func NewSSTCPConn(c net.Conn, cipher *cipher.StreamCipher) *SSTCPConn {
+	return &SSTCPConn{
+		Conn:                c,
+		StreamCipher:        cipher,
+		readBuf:             pool.GetBuffer(bufSize),
+		decryptedBuf:        pool.GetBytesBuffer(),
+		underPostdecryptBuf: pool.GetBytesBuffer(),
+		writeBuf:            pool.GetBuffer(bufSize),
+	}
+}
+
+func (c *SSTCPConn) Close() error {
+	pool.PutBuffer(c.readBuf)
+	pool.PutBytesBuffer(c.decryptedBuf)
+	pool.PutBytesBuffer(c.underPostdecryptBuf)
+	pool.PutBuffer(c.writeBuf)
+	return c.Conn.Close()
+}
+
+func (c *SSTCPConn) GetIv() (iv []byte) {
+	iv = make([]byte, len(c.IV()))
+	copy(iv, c.IV())
+	return
+}
+
+func (c *SSTCPConn) GetKey() (key []byte) {
+	key = make([]byte, len(c.Key()))
+	copy(key, c.Key())
+	return
+}
+
+func (c *SSTCPConn) initEncryptor(b []byte) (iv []byte, err error) {
+	if !c.EncryptInited() {
+		iv, err = c.InitEncrypt()
+		if err != nil {
+			return nil, err
+		}
+
+		overhead := c.IObfs.GetOverhead() + c.IProtocol.GetOverhead()
+		// should initialize obfs/protocol now, because iv is ready now
+		obfsServerInfo := c.IObfs.GetServerInfo()
+		obfsServerInfo.SetHeadLen(b, 30)
+		obfsServerInfo.IV, obfsServerInfo.IVLen = c.IV(), c.InfoIVLen()
+		obfsServerInfo.Key, obfsServerInfo.KeyLen = c.Key(), c.InfoKeyLen()
+		obfsServerInfo.Overhead = overhead
+		c.IObfs.SetServerInfo(obfsServerInfo)
+
+		protocolServerInfo := c.IProtocol.GetServerInfo()
+		protocolServerInfo.SetHeadLen(b, 30)
+		protocolServerInfo.IV, protocolServerInfo.IVLen = c.IV(), c.InfoIVLen()
+		protocolServerInfo.Key, protocolServerInfo.KeyLen = c.Key(), c.InfoKeyLen()
+		protocolServerInfo.Overhead = overhead
+		c.IProtocol.SetServerInfo(protocolServerInfo)
+	}
+	return
+}
+
+func (c *SSTCPConn) Read(b []byte) (n int, err error) {
+	for {
+		n, err = c.doRead(b)
+		if b == nil || n != 0 || err != nil {
+			return n, err
+		}
+	}
+}
+
+func (c *SSTCPConn) doRead(b []byte) (n int, err error) {
+	if c.decryptedBuf.Len() > 0 {
+		return c.decryptedBuf.Read(b)
+	}
+
+	n, err = c.Conn.Read(c.readBuf)
+	if n == 0 || err != nil {
+		return n, err
+	}
+
+	decodedData, needSendBack, err := c.IObfs.Decode(c.readBuf[:n])
+	if err != nil {
+		return 0, err
+	}
+
+	//do send back
+	if needSendBack {
+		c.Write(nil)
+		return 0, nil
+	}
+
+	decodedDataLen := len(decodedData)
+	if decodedDataLen == 0 {
+		return 0, nil
+	}
+
+	if !c.DecryptInited() {
+		if len(decodedData) < c.InfoIVLen() {
+			return 0, errors.New(fmt.Sprintf("invalid ivLen:%v, actual length:%v", c.InfoIVLen(), len(decodedData)))
+		}
+
+		iv := decodedData[0:c.InfoIVLen()]
+		if err = c.InitDecrypt(iv); err != nil {
+			return 0, err
+		}
+
+		if len(c.IV()) == 0 {
+			c.SetIV(iv)
+		}
+
+		decodedDataLen -= c.InfoIVLen()
+		if decodedDataLen <= 0 {
+			return 0, nil
+		}
+
+		decodedData = decodedData[c.InfoIVLen():]
+	}
+
+	buf1 := pool.GetBuffer(decodedDataLen)
+	defer pool.PutBuffer(buf1)
+
+	c.Decrypt(buf1, decodedData)
+	c.underPostdecryptBuf.Write(buf1)
+	buf := c.underPostdecryptBuf.Bytes()
+
+	postDecryptedData, length, err := c.IProtocol.PostDecrypt(buf)
+	if err != nil {
+		c.underPostdecryptBuf.Reset()
+		return 0, err
+	}
+	if length == 0 {
+		// not enough to postDecrypt
+		return 0, nil
+	} else {
+		c.underPostdecryptBuf.Next(length)
+	}
+
+	postDecryptedLength := len(postDecryptedData)
+	blength := len(b)
+
+	if blength >= postDecryptedLength {
+		copy(b, postDecryptedData)
+		return postDecryptedLength, nil
+	}
+
+	copy(b, postDecryptedData[:blength])
+	c.decryptedBuf.Write(postDecryptedData[blength:])
+
+	return blength, nil
+}
+
+func (c *SSTCPConn) preWrite(b []byte) (outData []byte, err error) {
+	if b == nil {
+		b = make([]byte, 0)
+	}
+
+	var iv []byte
+	if iv, err = c.initEncryptor(b); err != nil {
+		return
+	}
+
+	var preEncryptedData []byte
+	preEncryptedData, err = c.IProtocol.PreEncrypt(b)
+	if err != nil {
+		return
+	}
+	preEncryptedDataLen := len(preEncryptedData)
+	//! \attention here the expected output buffer length MUST be accurate, it is preEncryptedDataLen now!
+
+	cipherData := c.writeBuf
+	dataSize := preEncryptedDataLen + len(iv)
+	if dataSize > len(cipherData) {
+		cipherData = make([]byte, dataSize)
+	} else {
+		cipherData = cipherData[:dataSize]
+	}
+
+	if iv != nil {
+		// Put initialization vector in buffer before be encoded
+		copy(cipherData, iv)
+	}
+
+	c.Encrypt(cipherData[len(iv):], preEncryptedData)
+	return c.IObfs.Encode(cipherData)
+}
+
+func (c *SSTCPConn) Write(b []byte) (n int, err error) {
+	outData, err := c.preWrite(b)
+	if err != nil {
+		return 0, err
+	}
+	n, err = c.Conn.Write(outData)
+	if err != nil {
+		return 0, err
+	}
+	return len(b), nil
+}

proxy/ssr/internal/obfs/base.go

@@ -0,0 +1,36 @@
+package obfs
+
+import (
+	"strings"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+type creator func() IObfs
+
+var (
+	creatorMap = make(map[string]creator)
+)
+
+type IObfs interface {
+	SetServerInfo(s *ssr.ServerInfo)
+	GetServerInfo() (s *ssr.ServerInfo)
+	Encode(data []byte) (encodedData []byte, err error)
+	Decode(data []byte) (decodedData []byte, needSendBack bool, err error)
+	SetData(data any)
+	GetData() any
+	GetOverhead() int
+}
+
+func register(name string, c creator) {
+	creatorMap[name] = c
+}
+
+// NewObfs create an obfs object by name and return as an IObfs interface
+func NewObfs(name string) IObfs {
+	c, ok := creatorMap[strings.ToLower(name)]
+	if ok {
+		return c()
+	}
+	return nil
+}

proxy/ssr/internal/obfs/http_post.go

@@ -0,0 +1,20 @@
+package obfs
+
+import (
+	"math/rand/v2"
+)
+
+func init() {
+	register("http_post", newHttpPost)
+}
+
+// newHttpPost create a http_post object
+func newHttpPost() IObfs {
+	// newHttpSimple create a http_simple object
+
+	t := &httpSimplePost{
+		userAgentIndex: rand.IntN(len(requestUserAgent)),
+		methodGet:      false,
+	}
+	return t
+}

proxy/ssr/internal/obfs/http_simple.go

@@ -0,0 +1,185 @@
+package obfs
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"math/rand/v2"
+	"strings"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+var (
+	requestPath = []string{
+		"", "",
+		"login.php?redir=", "",
+		"register.php?code=", "",
+		"?keyword=", "",
+		"search?src=typd&q=", "&lang=en",
+		"s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&ch=&bar=&wd=", "&rn=",
+		"post.php?id=", "&goto=view.php",
+	}
+	requestUserAgent = []string{
+		"Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0",
+		"Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/44.0",
+		"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36",
+		"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Ubuntu/11.10 Chromium/27.0.1453.93 Chrome/27.0.1453.93 Safari/537.36",
+		"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0",
+		"Mozilla/5.0 (compatible; WOW64; MSIE 10.0; Windows NT 6.2)",
+		"Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.20.25 (KHTML, like Gecko) Version/5.0.4 Safari/533.20.27",
+		"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.3; Trident/7.0; .NET4.0E; .NET4.0C)",
+		"Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
+		"Mozilla/5.0 (Linux; Android 4.4; Nexus 5 Build/BuildID) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36",
+		"Mozilla/5.0 (iPad; CPU OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3",
+		"Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3",
+	}
+)
+
+// HttpSimple http_simple obfs encapsulate
+type httpSimplePost struct {
+	ssr.ServerInfo
+	rawTransSent     bool
+	rawTransReceived bool
+	userAgentIndex   int
+	methodGet        bool // true for get, false for post
+}
+
+func init() {
+	register("http_simple", newHttpSimple)
+}
+
+// newHttpSimple create a http_simple object
+func newHttpSimple() IObfs {
+
+	t := &httpSimplePost{
+		rawTransSent:     false,
+		rawTransReceived: false,
+		userAgentIndex:   rand.IntN(len(requestUserAgent)),
+		methodGet:        true,
+	}
+	return t
+}
+
+func (t *httpSimplePost) SetServerInfo(s *ssr.ServerInfo) {
+	t.ServerInfo = *s
+}
+
+func (t *httpSimplePost) GetServerInfo() (s *ssr.ServerInfo) {
+	return &t.ServerInfo
+}
+
+func (t *httpSimplePost) SetData(data any) {
+
+}
+
+func (t *httpSimplePost) GetData() any {
+	return nil
+}
+
+func (t *httpSimplePost) boundary() (ret string) {
+
+	set := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+	for range 32 {
+		ret = fmt.Sprintf("%s%c", ret, set[rand.IntN(len(set))])
+	}
+	return
+}
+
+func (t *httpSimplePost) data2URLEncode(data []byte) (ret string) {
+	for i := range data {
+		ret = fmt.Sprintf("%s%%%s", ret, hex.EncodeToString([]byte{data[i]}))
+	}
+	return
+}
+
+func (t *httpSimplePost) Encode(data []byte) (encodedData []byte, err error) {
+	if t.rawTransSent {
+		return data, nil
+	}
+
+	dataLength := len(data)
+	var headData []byte
+	if headSize := t.IVLen + t.HeadLen; dataLength-headSize > 64 {
+		headData = make([]byte, headSize+rand.IntN(64))
+	} else {
+		headData = make([]byte, dataLength)
+	}
+	copy(headData, data[0:len(headData)])
+	requestPathIndex := rand.IntN(len(requestPath)/2) * 2
+	host := t.Host
+	var customHead string
+
+	if len(t.Param) > 0 {
+		customHeads := strings.Split(t.Param, "#")
+		if len(customHeads) > 2 {
+			customHeads = customHeads[0:2]
+		}
+		param := t.Param
+		if len(customHeads) > 1 {
+			customHead = customHeads[1]
+			param = customHeads[0]
+		}
+		hosts := strings.Split(param, ",")
+		if len(hosts) > 0 {
+			host = strings.TrimSpace(hosts[rand.IntN(len(hosts))])
+		}
+	}
+	method := "GET /"
+	if !t.methodGet {
+		method = "POST /"
+	}
+	httpBuf := fmt.Sprintf("%s%s%s%s HTTP/1.1\r\nHost: %s:%d\r\n",
+		method,
+		requestPath[requestPathIndex],
+		t.data2URLEncode(headData),
+		requestPath[requestPathIndex+1],
+		host,
+		t.Port)
+	if len(customHead) > 0 {
+		httpBuf = httpBuf + strings.Replace(customHead, "\\n", "\r\n", -1) + "\r\n\r\n"
+	} else {
+		var contentType string
+		if !t.methodGet {
+			contentType = "Content-Type: multipart/form-data; boundary=" + t.boundary() + "\r\n"
+		}
+		httpBuf = httpBuf +
+			"User-Agent: " + requestUserAgent[t.userAgentIndex] + "\r\n" +
+			"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n" +
+			"Accept-Language: en-US,en;q=0.8\r\n" +
+			"Accept-Encoding: gzip, deflate\r\n" +
+			contentType +
+			"DNT: 1\r\n" +
+			"Connection: keep-alive\r\n" +
+			"\r\n"
+	}
+
+	if len(headData) < dataLength {
+		encodedData = make([]byte, len(httpBuf)+(dataLength-len(headData)))
+		copy(encodedData, []byte(httpBuf))
+		copy(encodedData[len(httpBuf):], data[len(headData):])
+	} else {
+		encodedData = []byte(httpBuf)
+	}
+	t.rawTransSent = true
+
+	return
+}
+
+func (t *httpSimplePost) Decode(data []byte) (decodedData []byte, needSendBack bool, err error) {
+	if t.rawTransReceived {
+		return data, false, nil
+	}
+
+	pos := bytes.Index(data, []byte("\r\n\r\n"))
+	if pos > 0 {
+		decodedData = make([]byte, len(data)-pos-4)
+		copy(decodedData, data[pos+4:])
+		t.rawTransReceived = true
+	}
+	return decodedData, false, nil
+}
+
+func (t *httpSimplePost) GetOverhead() int {
+	return 0
+}

proxy/ssr/internal/obfs/plain.go

@@ -0,0 +1,46 @@
+package obfs
+
+import (
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+func init() {
+	register("plain", newPlainObfs)
+}
+
+type plain struct {
+	ssr.ServerInfo
+}
+
+func newPlainObfs() IObfs {
+	p := &plain{}
+	return p
+}
+
+func (p *plain) SetServerInfo(s *ssr.ServerInfo) {
+	p.ServerInfo = *s
+}
+
+func (p *plain) GetServerInfo() (s *ssr.ServerInfo) {
+	return &p.ServerInfo
+}
+
+func (p *plain) Encode(data []byte) (encodedData []byte, err error) {
+	return data, nil
+}
+
+func (p *plain) Decode(data []byte) (decodedData []byte, needSendBack bool, err error) {
+	return data, false, nil
+}
+
+func (p *plain) SetData(data any) {
+
+}
+
+func (p *plain) GetData() any {
+	return nil
+}
+
+func (p *plain) GetOverhead() int {
+	return 0
+}

proxy/ssr/internal/obfs/random_head.go

@@ -0,0 +1,84 @@
+package obfs
+
+import (
+	crand "crypto/rand"
+	"math/rand/v2"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+type randomHead struct {
+	ssr.ServerInfo
+	rawTransSent     bool
+	rawTransReceived bool
+	hasSentHeader    bool
+	dataBuffer       []byte
+}
+
+func init() {
+	register("random_head", newRandomHead)
+}
+
+func newRandomHead() IObfs {
+	p := &randomHead{}
+	return p
+}
+
+func (r *randomHead) SetServerInfo(s *ssr.ServerInfo) {
+	r.ServerInfo = *s
+}
+
+func (r *randomHead) GetServerInfo() (s *ssr.ServerInfo) {
+	return &r.ServerInfo
+}
+
+func (r *randomHead) SetData(data any) {
+
+}
+
+func (r *randomHead) GetData() any {
+	return nil
+}
+
+func (r *randomHead) Encode(data []byte) (encodedData []byte, err error) {
+	if r.rawTransSent {
+		return data, nil
+	}
+
+	dataLength := len(data)
+	if r.hasSentHeader {
+		if dataLength > 0 {
+			d := make([]byte, len(r.dataBuffer)+dataLength)
+			copy(d, r.dataBuffer)
+			copy(d[len(r.dataBuffer):], data)
+			r.dataBuffer = d
+		} else {
+			encodedData = r.dataBuffer
+			r.dataBuffer = nil
+			r.rawTransSent = true
+		}
+	} else {
+		size := rand.IntN(96) + 8
+		encodedData = make([]byte, size)
+		crand.Read(encodedData)
+		ssr.SetCRC32(encodedData, size)
+
+		d := make([]byte, dataLength)
+		copy(d, data)
+		r.dataBuffer = d
+	}
+	r.hasSentHeader = true
+	return
+}
+
+func (r *randomHead) Decode(data []byte) (decodedData []byte, needSendBack bool, err error) {
+	if r.rawTransReceived {
+		return data, false, nil
+	}
+	r.rawTransReceived = true
+	return data, true, nil
+}
+
+func (r *randomHead) GetOverhead() int {
+	return 0
+}

proxy/ssr/internal/obfs/tls12_ticket_auth.go

@@ -0,0 +1,313 @@
+package obfs
+
+import (
+	"bytes"
+	"crypto/hmac"
+	crand "crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"log"
+	"math/rand/v2"
+	"strings"
+	"time"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("tls1.2_ticket_auth", newTLS12TicketAuth)
+	register("tls1.2_ticket_fastauth", newTLS12TicketFastAuth)
+}
+
+type tlsAuthData struct {
+	localClientID [32]byte
+}
+
+// tls12TicketAuth tls1.2_ticket_auth obfs encapsulate
+type tls12TicketAuth struct {
+	ssr.ServerInfo
+	data            *tlsAuthData
+	handshakeStatus int
+	sendSaver       []byte
+	recvBuffer      bytes.Buffer
+	fastAuth        bool
+}
+
+// newTLS12TicketAuth create a tlv1.2_ticket_auth object
+func newTLS12TicketAuth() IObfs {
+	return &tls12TicketAuth{}
+}
+
+// newTLS12TicketFastAuth create a tlv1.2_ticket_fastauth object
+func newTLS12TicketFastAuth() IObfs {
+	return &tls12TicketAuth{
+		fastAuth: true,
+	}
+}
+
+func (t *tls12TicketAuth) SetServerInfo(s *ssr.ServerInfo) {
+	t.ServerInfo = *s
+}
+
+func (t *tls12TicketAuth) GetServerInfo() (s *ssr.ServerInfo) {
+	return &t.ServerInfo
+}
+
+func (t *tls12TicketAuth) SetData(data any) {
+	if auth, ok := data.(*tlsAuthData); ok {
+		t.data = auth
+	}
+}
+
+func (t *tls12TicketAuth) GetData() any {
+	if t.data == nil {
+		t.data = &tlsAuthData{}
+		b := make([]byte, 32)
+
+		crand.Read(b)
+		copy(t.data.localClientID[:], b)
+	}
+	return t.data
+}
+
+func (t *tls12TicketAuth) getHost() string {
+	host := t.Host
+	if len(t.Param) > 0 {
+		hosts := strings.Split(t.Param, ",")
+		if len(hosts) > 0 {
+
+			host = hosts[rand.IntN(len(hosts))]
+			host = strings.TrimSpace(host)
+		}
+	}
+	if len(host) > 0 && host[len(host)-1] >= byte('0') && host[len(host)-1] <= byte('9') && len(t.Param) == 0 {
+		host = ""
+	}
+	return host
+}
+
+func packData(prefixData []byte, suffixData []byte) (outData []byte) {
+	d := []byte{0x17, 0x3, 0x3, 0, 0}
+	binary.BigEndian.PutUint16(d[3:5], uint16(len(suffixData)&0xFFFF))
+	outData = append(prefixData, d...)
+	outData = append(outData, suffixData...)
+	return
+}
+
+func (t *tls12TicketAuth) Encode(data []byte) (encodedData []byte, err error) {
+	encodedData = make([]byte, 0)
+	switch t.handshakeStatus {
+	case 8:
+		if len(data) < 1024 {
+			d := []byte{0x17, 0x3, 0x3, 0, 0}
+			binary.BigEndian.PutUint16(d[3:5], uint16(len(data)&0xFFFF))
+			encodedData = append(d, data...)
+			return
+		} else {
+			start := 0
+			var l int
+			for len(data)-start > 2048 {
+				l = rand.IntN(4096) + 100
+				if l > len(data)-start {
+					l = len(data) - start
+				}
+				encodedData = packData(encodedData, data[start:start+l])
+				start += l
+			}
+			if len(data)-start > 0 {
+				l = len(data) - start
+				encodedData = packData(encodedData, data[start:start+l])
+			}
+			return
+		}
+	case 1:
+		if len(data) > 0 {
+			if len(data) < 1024 {
+				t.sendSaver = packData(t.sendSaver, data)
+			} else {
+				start := 0
+				var l int
+				for len(data)-start > 2048 {
+					l = rand.IntN(4096) + 100
+					if l > len(data)-start {
+						l = len(data) - start
+					}
+					encodedData = packData(encodedData, data[start:start+l])
+					start += l
+				}
+				if len(data)-start > 0 {
+					l = len(data) - start
+					encodedData = packData(encodedData, data[start:start+l])
+				}
+				t.sendSaver = append(t.sendSaver, encodedData...)
+				encodedData = encodedData[:0]
+			}
+			return []byte{}, nil
+		}
+		hmacData := make([]byte, 43)
+		handshakeFinish := []byte("\x14\x03\x03\x00\x01\x01\x16\x03\x03\x00\x20")
+		copy(hmacData, handshakeFinish)
+		crand.Read(hmacData[11:33])
+		h := t.hmacSHA1(hmacData[:33])
+		copy(hmacData[33:], h)
+		encodedData = append(hmacData, t.sendSaver...)
+		t.sendSaver = t.sendSaver[:0]
+		t.handshakeStatus = 8
+	case 0:
+		tlsData0 := []byte("\x00\x1c\xc0\x2b\xc0\x2f\xcc\xa9\xcc\xa8\xcc\x14\xcc\x13\xc0\x0a\xc0\x14\xc0\x09\xc0\x13\x00\x9c\x00\x35\x00\x2f\x00\x0a\x01\x00")
+		tlsData1 := []byte("\xff\x01\x00\x01\x00")
+		tlsData2 := []byte("\x00\x17\x00\x00\x00\x23\x00\xd0")
+		tlsData3 := []byte("\x00\x0d\x00\x16\x00\x14\x06\x01\x06\x03\x05\x01\x05\x03\x04\x01\x04\x03\x03\x01\x03\x03\x02\x01\x02\x03\x00\x05\x00\x05\x01\x00\x00\x00\x00\x00\x12\x00\x00\x75\x50\x00\x00\x00\x0b\x00\x02\x01\x00\x00\x0a\x00\x06\x00\x04\x00\x17\x00\x18\x00\x15\x00\x66\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")
+
+		var tlsData [2048]byte
+		tlsDataLen := 0
+		copy(tlsData[0:], tlsData1)
+		tlsDataLen += len(tlsData1)
+		sni := t.sni(t.getHost())
+		copy(tlsData[tlsDataLen:], sni)
+		tlsDataLen += len(sni)
+		copy(tlsData[tlsDataLen:], tlsData2)
+		tlsDataLen += len(tlsData2)
+		ticketLen := rand.IntN(164)*2 + 64
+		tlsData[tlsDataLen-1] = uint8(ticketLen & 0xff)
+		tlsData[tlsDataLen-2] = uint8(ticketLen >> 8)
+		//ticketLen := 208
+		crand.Read(tlsData[tlsDataLen : tlsDataLen+ticketLen])
+		tlsDataLen += ticketLen
+		copy(tlsData[tlsDataLen:], tlsData3)
+		tlsDataLen += len(tlsData3)
+
+		length := 11 + 32 + 1 + 32 + len(tlsData0) + 2 + tlsDataLen
+		encodedData = make([]byte, length)
+		pdata := length - tlsDataLen
+		l := tlsDataLen
+		copy(encodedData[pdata:], tlsData[:tlsDataLen])
+		encodedData[pdata-1] = uint8(tlsDataLen)
+		encodedData[pdata-2] = uint8(tlsDataLen >> 8)
+		pdata -= 2
+		l += 2
+		copy(encodedData[pdata-len(tlsData0):], tlsData0)
+		pdata -= len(tlsData0)
+		l += len(tlsData0)
+		copy(encodedData[pdata-32:], t.data.localClientID[:])
+		pdata -= 32
+		l += 32
+		encodedData[pdata-1] = 0x20
+		pdata -= 1
+		l += 1
+		copy(encodedData[pdata-32:], t.packAuthData())
+		pdata -= 32
+		l += 32
+		encodedData[pdata-1] = 0x3
+		encodedData[pdata-2] = 0x3 // tls version
+		pdata -= 2
+		l += 2
+		encodedData[pdata-1] = uint8(l)
+		encodedData[pdata-2] = uint8(l >> 8)
+		encodedData[pdata-3] = 0
+		encodedData[pdata-4] = 1
+		pdata -= 4
+		l += 4
+		encodedData[pdata-1] = uint8(l)
+		encodedData[pdata-2] = uint8(l >> 8)
+		pdata -= 2
+		// l += 2
+		encodedData[pdata-1] = 0x1
+		encodedData[pdata-2] = 0x3 // tls version
+		pdata -= 2
+		// l += 2
+		encodedData[pdata-1] = 0x16 // tls handshake
+		// pdata -= 1
+		// l += 1
+
+		t.sendSaver = packData(t.sendSaver, data)
+		t.handshakeStatus = 1
+	default:
+		//log.Println(fmt.Errorf("unexpected handshake status: %d", t.handshakeStatus))
+		return nil, fmt.Errorf("unexpected handshake status: %d", t.handshakeStatus)
+	}
+	return
+}
+
+func (t *tls12TicketAuth) Decode(data []byte) (decodedData []byte, needSendBack bool, err error) {
+	if t.handshakeStatus == -1 {
+		return data, false, nil
+	}
+
+	if t.handshakeStatus == 8 {
+		t.recvBuffer.Write(data)
+		for t.recvBuffer.Len() > 5 {
+			var h [5]byte
+			_, _ = t.recvBuffer.Read(h[:])
+			if !bytes.Equal(h[0:3], []byte{0x17, 0x3, 0x3}) {
+				log.Println("incorrect magic number", h[0:3], ", 0x170303 is expected")
+				return nil, false, ssr.ErrTLS12TicketAuthIncorrectMagicNumber
+			}
+			size := int(binary.BigEndian.Uint16(h[3:5]))
+			if t.recvBuffer.Len() < size {
+				unread := t.recvBuffer.Bytes()
+				t.recvBuffer.Reset()
+				t.recvBuffer.Write(h[:])
+				t.recvBuffer.Write(unread)
+				break
+			}
+			d := make([]byte, size)
+			_, _ = t.recvBuffer.Read(d)
+			decodedData = append(decodedData, d...)
+		}
+		return decodedData, false, nil
+	}
+
+	if len(data) < 11+32+1+32 {
+		return nil, false, ssr.ErrTLS12TicketAuthTooShortData
+	}
+
+	hash := t.hmacSHA1(data[11 : 11+22])
+
+	if !hmac.Equal(data[33:33+ssr.ObfsHMACSHA1Len], hash) {
+		return nil, false, ssr.ErrTLS12TicketAuthHMACError
+	}
+	return nil, true, nil
+}
+
+func (t *tls12TicketAuth) packAuthData() (outData []byte) {
+	outSize := 32
+	outData = make([]byte, outSize)
+
+	now := time.Now().Unix()
+	binary.BigEndian.PutUint32(outData[0:4], uint32(now))
+
+	crand.Read(outData[4 : 4+18])
+
+	hash := t.hmacSHA1(outData[:outSize-ssr.ObfsHMACSHA1Len])
+	copy(outData[outSize-ssr.ObfsHMACSHA1Len:], hash)
+
+	return
+}
+
+func (t *tls12TicketAuth) hmacSHA1(data []byte) []byte {
+	key := make([]byte, t.KeyLen+32)
+	copy(key, t.Key)
+	copy(key[t.KeyLen:], t.data.localClientID[:])
+
+	sha1Data := tools.HmacSHA1(key, data)
+	return sha1Data[:ssr.ObfsHMACSHA1Len]
+}
+
+func (t *tls12TicketAuth) sni(u string) []byte {
+	bURL := []byte(u)
+	length := len(bURL)
+	ret := make([]byte, length+9)
+	copy(ret[9:9+length], bURL)
+	binary.BigEndian.PutUint16(ret[7:], uint16(length&0xFFFF))
+	length += 3
+	binary.BigEndian.PutUint16(ret[4:], uint16(length&0xFFFF))
+	length += 2
+	binary.BigEndian.PutUint16(ret[2:], uint16(length&0xFFFF))
+	return ret
+}
+
+func (t *tls12TicketAuth) GetOverhead() int {
+	return 5
+}

proxy/ssr/internal/protocol/auth_aes128_md5.go

@@ -0,0 +1,279 @@
+package protocol
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	crand "crypto/rand"
+	"encoding/base64"
+	"encoding/binary"
+	"math/rand/v2"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("auth_aes128_md5", NewAuthAES128MD5)
+}
+
+func NewAuthAES128MD5() IProtocol {
+	a := &authAES128{
+		salt:       "auth_aes128_md5",
+		hmac:       tools.HmacMD5,
+		hashDigest: tools.MD5Sum,
+		packID:     1,
+		recvInfo: recvInfo{
+			recvID: 1,
+			buffer: bytes.NewBuffer(nil),
+		},
+	}
+	return a
+}
+
+type recvInfo struct {
+	recvID uint32
+	buffer *bytes.Buffer
+}
+
+type authAES128 struct {
+	ssr.ServerInfo
+	recvInfo
+	data          *AuthData
+	hasSentHeader bool
+	packID        uint32
+	userKey       []byte
+	salt          string
+	hmac          hmacMethod
+	hashDigest    hashDigestMethod
+}
+
+func (a *authAES128) SetServerInfo(s *ssr.ServerInfo) {
+	a.ServerInfo = *s
+}
+
+func (a *authAES128) GetServerInfo() (s *ssr.ServerInfo) {
+	return &a.ServerInfo
+}
+
+func (a *authAES128) SetData(data any) {
+	if auth, ok := data.(*AuthData); ok {
+		a.data = auth
+	}
+}
+
+func (a *authAES128) GetData() any {
+	if a.data == nil {
+		a.data = &AuthData{}
+	}
+	return a.data
+}
+
+func (a *authAES128) packData(data []byte) (outData []byte) {
+	dataLength := len(data)
+	randLength := 1
+	if dataLength <= 1200 {
+		if a.packID > 4 {
+			randLength += rand.IntN(32)
+		} else {
+			if dataLength > 900 {
+				randLength += rand.IntN(128)
+			} else {
+				randLength += rand.IntN(512)
+			}
+		}
+	}
+
+	outLength := randLength + dataLength + 8
+	outData = make([]byte, outLength)
+	// 0~1, out length
+	binary.LittleEndian.PutUint16(outData[0:], uint16(outLength&0xFFFF))
+	// 2~3, hmac
+	key := make([]byte, len(a.userKey)+4)
+	copy(key, a.userKey)
+	binary.LittleEndian.PutUint32(key[len(key)-4:], a.packID)
+	h := a.hmac(key, outData[0:2])
+	copy(outData[2:4], h[:2])
+	// 4~rand length+4, rand number
+	crand.Read(outData[4 : 4+randLength])
+	// 4, rand length
+	if randLength < 128 {
+		outData[4] = byte(randLength & 0xFF)
+	} else {
+		// 4, magic number 0xFF
+		outData[4] = 0xFF
+		// 5~6, rand length
+		binary.LittleEndian.PutUint16(outData[5:], uint16(randLength&0xFFFF))
+	}
+	// rand length+4~out length-4, data
+	if dataLength > 0 {
+		copy(outData[randLength+4:], data)
+	}
+	a.packID++
+	h = a.hmac(key, outData[:outLength-4])
+	copy(outData[outLength-4:], h[:4])
+	return
+}
+
+func (a *authAES128) packAuthData(data []byte) (outData []byte) {
+	dataLength := len(data)
+	var randLength int
+	if dataLength > 400 {
+		randLength = rand.IntN(512)
+	} else {
+		randLength = rand.IntN(1024)
+	}
+
+	dataOffset := randLength + 16 + 4 + 4 + 7
+	outLength := dataOffset + dataLength + 4
+	outData = make([]byte, outLength)
+	encrypt := make([]byte, 24)
+	key := make([]byte, a.IVLen+a.KeyLen)
+	copy(key, a.IV)
+	copy(key[a.IVLen:], a.Key)
+
+	crand.Read(outData[dataOffset-randLength:])
+	a.data.mutex.Lock()
+	a.data.connectionID++
+	if a.data.connectionID > 0xFF000000 {
+		a.data.clientID = nil
+	}
+	if len(a.data.clientID) == 0 {
+		a.data.clientID = make([]byte, 8)
+		crand.Read(a.data.clientID)
+		b := make([]byte, 4)
+		crand.Read(b)
+		a.data.connectionID = binary.LittleEndian.Uint32(b) & 0xFFFFFF
+	}
+	copy(encrypt[4:], a.data.clientID)
+	binary.LittleEndian.PutUint32(encrypt[8:], a.data.connectionID)
+	a.data.mutex.Unlock()
+
+	now := time.Now().Unix()
+	binary.LittleEndian.PutUint32(encrypt[0:4], uint32(now))
+
+	binary.LittleEndian.PutUint16(encrypt[12:], uint16(outLength&0xFFFF))
+	binary.LittleEndian.PutUint16(encrypt[14:], uint16(randLength&0xFFFF))
+
+	params := strings.Split(a.Param, ":")
+	uid := make([]byte, 4)
+	if len(params) >= 2 {
+		if userID, err := strconv.ParseUint(params[0], 10, 32); err != nil {
+			crand.Read(uid)
+		} else {
+			binary.LittleEndian.PutUint32(uid, uint32(userID))
+			a.userKey = a.hashDigest([]byte(params[1]))
+		}
+	} else {
+		crand.Read(uid)
+	}
+
+	if a.userKey == nil {
+		a.userKey = make([]byte, a.KeyLen)
+		copy(a.userKey, a.Key)
+	}
+
+	encryptKey := make([]byte, len(a.userKey))
+	copy(encryptKey, a.userKey)
+
+	aesCipherKey := tools.EVPBytesToKey(base64.StdEncoding.EncodeToString(encryptKey)+a.salt, 16)
+	block, err := aes.NewCipher(aesCipherKey)
+	if err != nil {
+		return nil
+	}
+
+	encryptData := make([]byte, 16)
+	iv := make([]byte, aes.BlockSize)
+	cbc := cipher.NewCBCEncrypter(block, iv)
+	cbc.CryptBlocks(encryptData, encrypt[0:16])
+	copy(encrypt[4:4+16], encryptData)
+	copy(encrypt[0:4], uid)
+
+	h := a.hmac(key, encrypt[0:20])
+	copy(encrypt[20:], h[:4])
+
+	crand.Read(outData[0:1])
+	h = a.hmac(key, outData[0:1])
+	copy(outData[1:], h[0:7-1])
+
+	copy(outData[7:], encrypt)
+	copy(outData[dataOffset:], data)
+
+	h = a.hmac(a.userKey, outData[0:outLength-4])
+	copy(outData[outLength-4:], h[:4])
+
+	//log.Println("clientID:", a.data.clientID, "connectionID:", a.data.connectionID)
+	return
+}
+
+func (a *authAES128) PreEncrypt(plainData []byte) (outData []byte, err error) {
+	dataLength := len(plainData)
+	offset := 0
+	if dataLength > 0 && !a.hasSentHeader {
+		authLength := dataLength
+		if authLength > 1200 {
+			authLength = 1200
+		}
+		packData := a.packAuthData(plainData[:authLength])
+		a.hasSentHeader = true
+		outData = append(outData, packData...)
+		dataLength -= authLength
+		offset += authLength
+	}
+	const blockSize = 4096
+	for dataLength > blockSize {
+		packData := a.packData(plainData[offset : offset+blockSize])
+		outData = append(outData, packData...)
+		dataLength -= blockSize
+		offset += blockSize
+	}
+	if dataLength > 0 {
+		packData := a.packData(plainData[offset:])
+		outData = append(outData, packData...)
+	}
+
+	return
+}
+
+func (a *authAES128) PostDecrypt(plainData []byte) ([]byte, int, error) {
+	a.buffer.Reset()
+	plainLength := len(plainData)
+	readlenth := 0
+	key := make([]byte, len(a.userKey)+4)
+	copy(key, a.userKey)
+	for plainLength > 4 {
+		binary.LittleEndian.PutUint32(key[len(key)-4:], a.recvID)
+
+		h := a.hmac(key, plainData[0:2])
+		if h[0] != plainData[2] || h[1] != plainData[3] {
+			return nil, 0, ssr.ErrAuthAES128IncorrectHMAC
+		}
+		length := int(binary.LittleEndian.Uint16(plainData[0:2]))
+		if length >= 8192 || length < 8 {
+			return nil, 0, ssr.ErrAuthAES128DataLengthError
+		}
+		if length > plainLength {
+			break
+		}
+		a.recvID++
+		pos := int(plainData[4])
+		if pos < 255 {
+			pos += 4
+		} else {
+			pos = int(binary.LittleEndian.Uint16(plainData[5:7])) + 4
+		}
+
+		a.buffer.Write(plainData[pos : length-4])
+		plainData = plainData[length:]
+		plainLength -= length
+		readlenth += length
+	}
+	return a.buffer.Bytes(), readlenth, nil
+}
+
+func (a *authAES128) GetOverhead() int {
+	return 9
+}

proxy/ssr/internal/protocol/auth_aes128_sha1.go

@@ -0,0 +1,25 @@
+package protocol
+
+import (
+	"bytes"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("auth_aes128_sha1", NewAuthAES128SHA1)
+}
+
+func NewAuthAES128SHA1() IProtocol {
+	a := &authAES128{
+		salt:       "auth_aes128_sha1",
+		hmac:       tools.HmacSHA1,
+		hashDigest: tools.SHA1Sum,
+		packID:     1,
+		recvInfo: recvInfo{
+			recvID: 1,
+			buffer: bytes.NewBuffer(nil),
+		},
+	}
+	return a
+}

proxy/ssr/internal/protocol/auth_chain_a.go

@@ -0,0 +1,320 @@
+// https://github.com/shadowsocksr-backup/shadowsocks-rss/blob/master/doc/auth_chain_a.md
+
+package protocol
+
+import (
+	"bytes"
+	"crypto/aes"
+	stdCipher "crypto/cipher"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/binary"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/cipher"
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("auth_chain_a", NewAuthChainA)
+}
+
+type authChainA struct {
+	ssr.ServerInfo
+	randomClient tools.Shift128plusContext
+	randomServer tools.Shift128plusContext
+	recvInfo
+	cipher         *cipher.StreamCipher
+	hasSentHeader  bool
+	lastClientHash []byte
+	lastServerHash []byte
+	userKey        []byte
+	uid            [4]byte
+	salt           string
+	data           *AuthData
+	hmac           hmacMethod
+	hashDigest     hashDigestMethod
+	rnd            rndMethod
+	dataSizeList   []int
+	dataSizeList2  []int
+	chunkID        uint32
+}
+
+func NewAuthChainA() IProtocol {
+	a := &authChainA{
+		salt:       "auth_chain_a",
+		hmac:       tools.HmacMD5,
+		hashDigest: tools.SHA1Sum,
+		rnd:        authChainAGetRandLen,
+		recvInfo: recvInfo{
+			recvID: 1,
+			buffer: new(bytes.Buffer),
+		},
+	}
+	return a
+}
+
+func (a *authChainA) SetServerInfo(s *ssr.ServerInfo) {
+	a.ServerInfo = *s
+	if a.salt == "auth_chain_b" {
+		a.authChainBInitDataSize()
+	}
+}
+
+func (a *authChainA) GetServerInfo() (s *ssr.ServerInfo) {
+	return &a.ServerInfo
+}
+
+func (a *authChainA) SetData(data any) {
+	if auth, ok := data.(*AuthData); ok {
+		a.data = auth
+	}
+}
+
+func (a *authChainA) GetData() any {
+	if a.data == nil {
+		a.data = &AuthData{}
+	}
+	return a.data
+}
+
+func authChainAGetRandLen(dataLength int, random *tools.Shift128plusContext, lastHash []byte, dataSizeList, dataSizeList2 []int, overhead int) int {
+	if dataLength > 1440 {
+		return 0
+	}
+	random.InitFromBinDatalen(lastHash[:16], dataLength)
+	if dataLength > 1300 {
+		return int(random.Next() % 31)
+	}
+	if dataLength > 900 {
+		return int(random.Next() % 127)
+	}
+	if dataLength > 400 {
+		return int(random.Next() % 521)
+	}
+	return int(random.Next() % 1021)
+}
+
+func getRandStartPos(random *tools.Shift128plusContext, randLength int) int {
+	if randLength > 0 {
+		return int(int64(random.Next()%8589934609) % int64(randLength))
+	}
+	return 0
+}
+
+func (a *authChainA) getClientRandLen(dataLength int, overhead int) int {
+	return a.rnd(dataLength, &a.randomClient, a.lastClientHash, a.dataSizeList, a.dataSizeList2, overhead)
+}
+
+func (a *authChainA) getServerRandLen(dataLength int, overhead int) int {
+	return a.rnd(dataLength, &a.randomServer, a.lastServerHash, a.dataSizeList, a.dataSizeList2, overhead)
+}
+
+func (a *authChainA) packedDataLen(data []byte) (chunkLength, randLength int) {
+	dataLength := len(data)
+	randLength = a.getClientRandLen(dataLength, a.Overhead)
+	chunkLength = randLength + dataLength + 2 + 2
+	return
+}
+
+func (a *authChainA) packData(outData []byte, data []byte, randLength int) {
+	dataLength := len(data)
+	outLength := randLength + dataLength + 2
+	outData[0] = byte(dataLength) ^ a.lastClientHash[14]
+	outData[1] = byte(dataLength>>8) ^ a.lastClientHash[15]
+
+	{
+		if dataLength > 0 {
+			randPart1Length := getRandStartPos(&a.randomClient, randLength)
+			rand.Read(outData[2 : 2+randPart1Length])
+			a.cipher.Encrypt(outData[2+randPart1Length:], data)
+			rand.Read(outData[2+randPart1Length+dataLength : outLength])
+		} else {
+			rand.Read(outData[2 : 2+randLength])
+		}
+	}
+
+	userKeyLen := uint8(len(a.userKey))
+	key := make([]byte, userKeyLen+4)
+	copy(key, a.userKey)
+	a.chunkID++
+	binary.LittleEndian.PutUint32(key[userKeyLen:], a.chunkID)
+	a.lastClientHash = a.hmac(key, outData[:outLength])
+	copy(outData[outLength:], a.lastClientHash[:2])
+	return
+}
+
+const authheadLength = 4 + 8 + 4 + 16 + 4
+
+func (a *authChainA) packAuthData(data []byte) (outData []byte) {
+	outData = make([]byte, authheadLength, authheadLength+1500)
+	a.data.connectionID++
+	if a.data.connectionID > 0xFF000000 {
+		rand.Read(a.data.clientID)
+		b := make([]byte, 4)
+		rand.Read(b)
+		a.data.connectionID = binary.LittleEndian.Uint32(b) & 0xFFFFFF
+	}
+	var key = make([]byte, a.IVLen+a.KeyLen)
+	copy(key, a.IV)
+	copy(key[a.IVLen:], a.Key)
+
+	encrypt := make([]byte, 20)
+	t := time.Now().Unix()
+	binary.LittleEndian.PutUint32(encrypt[:4], uint32(t))
+	copy(encrypt[4:8], a.data.clientID)
+	binary.LittleEndian.PutUint32(encrypt[8:], a.data.connectionID)
+	binary.LittleEndian.PutUint16(encrypt[12:], uint16(a.Overhead))
+	//binary.LittleEndian.PutUint16(encrypt[14:], 0)
+
+	// first 12 bytes
+	{
+		rand.Read(outData[:4])
+		a.lastClientHash = a.hmac(key, outData[:4])
+		copy(outData[4:], a.lastClientHash[:8])
+	}
+	var base64UserKey string
+	// uid & 16 bytes auth data
+	{
+		uid := make([]byte, 4)
+		if a.userKey == nil {
+			params := strings.Split(a.ServerInfo.Param, ":")
+			if len(params) >= 2 {
+				if userID, err := strconv.ParseUint(params[0], 10, 32); err == nil {
+					binary.LittleEndian.PutUint32(a.uid[:], uint32(userID))
+					a.userKey = a.hashDigest([]byte(params[1]))
+				}
+			}
+			if a.userKey == nil {
+				rand.Read(a.uid[:])
+				a.userKey = make([]byte, a.KeyLen)
+				copy(a.userKey, a.Key)
+			}
+		}
+		for i := range 4 {
+			uid[i] = a.uid[i] ^ a.lastClientHash[8+i]
+		}
+		base64UserKey = base64.StdEncoding.EncodeToString(a.userKey)
+		aesCipherKey := tools.EVPBytesToKey(base64UserKey+a.salt, 16)
+		block, err := aes.NewCipher(aesCipherKey)
+		if err != nil {
+			return
+		}
+		encryptData := make([]byte, 16)
+		iv := make([]byte, aes.BlockSize)
+		cbc := stdCipher.NewCBCEncrypter(block, iv)
+		cbc.CryptBlocks(encryptData, encrypt[:16])
+		copy(encrypt[:4], uid[:])
+		copy(encrypt[4:4+16], encryptData)
+	}
+	// final HMAC
+	{
+		a.lastServerHash = a.hmac(a.userKey, encrypt[0:20])
+
+		copy(outData[12:], encrypt)
+		copy(outData[12+20:], a.lastServerHash[:4])
+	}
+
+	// init cipher
+	password := make([]byte, len(base64UserKey)+base64.StdEncoding.EncodedLen(16))
+	copy(password, base64UserKey)
+	base64.StdEncoding.Encode(password[len(base64UserKey):], a.lastClientHash[:16])
+	a.cipher, _ = cipher.NewStreamCipher("rc4", string(password))
+	_, _ = a.cipher.InitEncrypt()
+	_ = a.cipher.InitDecrypt(nil)
+
+	// data
+	chunkLength, randLength := a.packedDataLen(data)
+	if chunkLength <= 1500 {
+		outData = outData[:authheadLength+chunkLength]
+	} else {
+		newOutData := make([]byte, authheadLength+chunkLength)
+		copy(newOutData, outData[:authheadLength])
+		outData = newOutData
+	}
+	a.packData(outData[authheadLength:], data, randLength)
+	return
+}
+
+func (a *authChainA) PreEncrypt(plainData []byte) (outData []byte, err error) {
+	a.buffer.Reset()
+	dataLength := len(plainData)
+	length := dataLength
+	offset := 0
+	if length > 0 && !a.hasSentHeader {
+		headSize := 1200
+		if headSize > dataLength {
+			headSize = dataLength
+		}
+		a.buffer.Write(a.packAuthData(plainData[:headSize]))
+		offset += headSize
+		dataLength -= headSize
+		a.hasSentHeader = true
+	}
+	var unitSize = a.TcpMss - a.Overhead
+	for dataLength > unitSize {
+		dataLen, randLength := a.packedDataLen(plainData[offset : offset+unitSize])
+		b := make([]byte, dataLen)
+		a.packData(b, plainData[offset:offset+unitSize], randLength)
+		a.buffer.Write(b)
+		dataLength -= unitSize
+		offset += unitSize
+	}
+	if dataLength > 0 {
+		dataLen, randLength := a.packedDataLen(plainData[offset:])
+		b := make([]byte, dataLen)
+		a.packData(b, plainData[offset:], randLength)
+		a.buffer.Write(b)
+	}
+	return a.buffer.Bytes(), nil
+}
+
+func (a *authChainA) PostDecrypt(plainData []byte) (outData []byte, n int, err error) {
+	a.buffer.Reset()
+	key := make([]byte, len(a.userKey)+4)
+	readlenth := 0
+	copy(key, a.userKey)
+	for len(plainData) > 4 {
+		binary.LittleEndian.PutUint32(key[len(a.userKey):], a.recvID)
+		dataLen := (int)((uint(plainData[1]^a.lastServerHash[15]) << 8) + uint(plainData[0]^a.lastServerHash[14]))
+		randLen := a.getServerRandLen(dataLen, a.Overhead)
+		length := randLen + dataLen
+		if length >= 4096 {
+			return nil, 0, ssr.ErrAuthChainDataLengthError
+		}
+		length += 4
+		if length > len(plainData) {
+			break
+		}
+
+		hash := a.hmac(key, plainData[:length-2])
+		if !bytes.Equal(hash[:2], plainData[length-2:length]) {
+			return nil, 0, ssr.ErrAuthChainIncorrectHMAC
+		}
+		var dataPos int
+		if dataLen > 0 && randLen > 0 {
+			dataPos = 2 + getRandStartPos(&a.randomServer, randLen)
+		} else {
+			dataPos = 2
+		}
+		b := make([]byte, dataLen)
+		a.cipher.Decrypt(b, plainData[dataPos:dataPos+dataLen])
+		a.buffer.Write(b)
+		if a.recvID == 1 {
+			a.TcpMss = int(binary.LittleEndian.Uint16(a.buffer.Next(2)))
+		}
+		a.lastServerHash = hash
+		a.recvID++
+		plainData = plainData[length:]
+		readlenth += length
+
+	}
+	return a.buffer.Bytes(), readlenth, nil
+}
+
+func (a *authChainA) GetOverhead() int {
+	return 4
+}

proxy/ssr/internal/protocol/auth_chain_b.go

@@ -0,0 +1,81 @@
+package protocol
+
+import (
+	"bytes"
+	"sort"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("auth_chain_b", NewAuthChainB)
+}
+
+func NewAuthChainB() IProtocol {
+	a := &authChainA{
+		salt:       "auth_chain_b",
+		hmac:       tools.HmacMD5,
+		hashDigest: tools.SHA1Sum,
+		rnd:        authChainBGetRandLen,
+		recvInfo: recvInfo{
+			recvID: 1,
+			buffer: new(bytes.Buffer),
+		},
+	}
+	return a
+}
+
+func (a *authChainA) authChainBInitDataSize() {
+	if len(a.Key) == 0 {
+		return
+	}
+	// libev version
+	random := &a.randomServer
+	random.InitFromBin(a.Key)
+	length := random.Next()%8 + 4
+	a.dataSizeList = make([]int, length)
+	for i := range int(length) {
+		a.dataSizeList[i] = int(random.Next() % 2340 % 2040 % 1440)
+	}
+	sort.Ints(a.dataSizeList)
+
+	length = random.Next()%16 + 8
+	a.dataSizeList2 = make([]int, length)
+	for i := range int(length) {
+		a.dataSizeList2[i] = int(random.Next() % 2340 % 2040 % 1440)
+	}
+	sort.Ints(a.dataSizeList2)
+}
+
+func authChainBGetRandLen(dataLength int, random *tools.Shift128plusContext, lastHash []byte, dataSizeList, dataSizeList2 []int, overhead int) int {
+	if dataLength > 1440 {
+		return 0
+	}
+	random.InitFromBinDatalen(lastHash[:16], dataLength)
+	// libev version, upper_bound
+	pos := sort.Search(len(dataSizeList), func(i int) bool { return dataSizeList[i] > dataLength+overhead })
+	finalPos := uint64(pos) + random.Next()%uint64(len(dataSizeList))
+	if finalPos < uint64(len(dataSizeList)) {
+		return dataSizeList[finalPos] - dataLength - overhead
+	}
+	// libev version, upper_bound
+	pos = sort.Search(len(dataSizeList2), func(i int) bool { return dataSizeList2[i] > dataLength+overhead })
+	finalPos = uint64(pos) + random.Next()%uint64(len(dataSizeList2))
+	if finalPos < uint64(len(dataSizeList2)) {
+		return dataSizeList2[finalPos] - dataLength - overhead
+	}
+	if finalPos < uint64(pos+len(dataSizeList2)-1) {
+		return 0
+	}
+
+	if dataLength > 1300 {
+		return int(random.Next() % 31)
+	}
+	if dataLength > 900 {
+		return int(random.Next() % 127)
+	}
+	if dataLength > 400 {
+		return int(random.Next() % 521)
+	}
+	return int(random.Next() % 1021)
+}

proxy/ssr/internal/protocol/auth_sha1_v4.go

@@ -0,0 +1,227 @@
+package protocol
+
+import (
+	"bytes"
+	crand "crypto/rand"
+	"encoding/binary"
+	"math/rand/v2"
+	"time"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("auth_sha1_v4", NewAuthSHA1v4)
+}
+
+type authSHA1v4 struct {
+	ssr.ServerInfo
+	data          *AuthData
+	hasSentHeader bool
+	buffer        bytes.Buffer
+}
+
+func NewAuthSHA1v4() IProtocol {
+	a := &authSHA1v4{}
+	return a
+}
+
+func (a *authSHA1v4) SetServerInfo(s *ssr.ServerInfo) {
+	a.ServerInfo = *s
+}
+
+func (a *authSHA1v4) GetServerInfo() (s *ssr.ServerInfo) {
+	return &a.ServerInfo
+}
+
+func (a *authSHA1v4) SetData(data any) {
+	if auth, ok := data.(*AuthData); ok {
+		a.data = auth
+	}
+}
+
+func (a *authSHA1v4) GetData() any {
+	if a.data == nil {
+		a.data = &AuthData{}
+	}
+	return a.data
+}
+
+func (a *authSHA1v4) packData(data []byte) (outData []byte) {
+	dataLength := len(data)
+	randLength := 1
+
+	if dataLength <= 1300 {
+		if dataLength > 400 {
+			randLength += rand.IntN(128)
+		} else {
+			randLength += rand.IntN(1024)
+		}
+	}
+
+	outLength := randLength + dataLength + 8
+	outData = make([]byte, outLength)
+	// 0~1, out length
+	binary.BigEndian.PutUint16(outData[0:2], uint16(outLength&0xFFFF))
+	// 2~3, crc of out length
+	crc32 := ssr.CalcCRC32(outData, 2, 0xFFFFFFFF)
+	binary.LittleEndian.PutUint16(outData[2:4], uint16(crc32&0xFFFF))
+	// 4, rand length
+	if randLength < 128 {
+		outData[4] = uint8(randLength & 0xFF)
+	} else {
+		outData[4] = uint8(0xFF)
+		binary.BigEndian.PutUint16(outData[5:7], uint16(randLength&0xFFFF))
+	}
+	// rand length+4~out length-4, data
+	if dataLength > 0 {
+		copy(outData[randLength+4:], data)
+	}
+	// out length-4~end, adler32 of full data
+	adler := ssr.CalcAdler32(outData[:outLength-4])
+	binary.LittleEndian.PutUint32(outData[outLength-4:], adler)
+
+	return outData
+}
+
+func (a *authSHA1v4) packAuthData(data []byte) (outData []byte) {
+
+	dataLength := len(data)
+	randLength := 1
+	if dataLength <= 1300 {
+		if dataLength > 400 {
+			randLength += rand.IntN(128)
+		} else {
+			randLength += rand.IntN(1024)
+		}
+	}
+	dataOffset := randLength + 4 + 2
+	outLength := dataOffset + dataLength + 12 + ssr.ObfsHMACSHA1Len
+	outData = make([]byte, outLength)
+	a.data.connectionID++
+	if a.data.connectionID > 0xFF000000 {
+		a.data.clientID = nil
+	}
+	if len(a.data.clientID) == 0 {
+		a.data.clientID = make([]byte, 8)
+		crand.Read(a.data.clientID)
+		b := make([]byte, 4)
+		crand.Read(b)
+		a.data.connectionID = binary.LittleEndian.Uint32(b) & 0xFFFFFF
+	}
+	// 0-1, out length
+	binary.BigEndian.PutUint16(outData[0:2], uint16(outLength&0xFFFF))
+
+	// 2~6, crc of out length+salt+key
+	salt := []byte("auth_sha1_v4")
+	crcData := make([]byte, len(salt)+a.KeyLen+2)
+	copy(crcData[0:2], outData[0:2])
+	copy(crcData[2:], salt)
+	copy(crcData[2+len(salt):], a.Key)
+	crc32 := ssr.CalcCRC32(crcData, len(crcData), 0xFFFFFFFF)
+	// 2~6, crc of out length+salt+key
+	binary.LittleEndian.PutUint32(outData[2:], crc32)
+	// 6~rand length+6, rand numbers
+	crand.Read(outData[dataOffset-randLength : dataOffset])
+	// 6, rand length
+	if randLength < 128 {
+		outData[6] = byte(randLength & 0xFF)
+	} else {
+		// 6, magic number 0xFF
+		outData[6] = 0xFF
+		// 7-8, rand length
+		binary.BigEndian.PutUint16(outData[7:9], uint16(randLength&0xFFFF))
+	}
+	// rand length+6~rand length+10, time stamp
+	now := time.Now().Unix()
+	binary.LittleEndian.PutUint32(outData[dataOffset:dataOffset+4], uint32(now))
+	// rand length+10~rand length+14, client ID
+	copy(outData[dataOffset+4:dataOffset+4+4], a.data.clientID[0:4])
+	// rand length+14~rand length+18, connection ID
+	binary.LittleEndian.PutUint32(outData[dataOffset+8:dataOffset+8+4], a.data.connectionID)
+	// rand length+18~rand length+18+data length, data
+	copy(outData[dataOffset+12:], data)
+
+	key := make([]byte, a.IVLen+a.KeyLen)
+	copy(key, a.IV)
+	copy(key[a.IVLen:], a.Key)
+
+	h := tools.HmacSHA1(key, outData[:outLength-ssr.ObfsHMACSHA1Len])
+	// out length-10~out length/rand length+18+data length~end, hmac
+	copy(outData[outLength-ssr.ObfsHMACSHA1Len:], h[0:ssr.ObfsHMACSHA1Len])
+	return outData
+}
+
+func (a *authSHA1v4) PreEncrypt(plainData []byte) (outData []byte, err error) {
+	a.buffer.Reset()
+	dataLength := len(plainData)
+	offset := 0
+	if !a.hasSentHeader && dataLength > 0 {
+		headSize := ssr.GetHeadSize(plainData, 30)
+		if headSize > dataLength {
+			headSize = dataLength
+		}
+		a.buffer.Write(a.packAuthData(plainData[:headSize]))
+		offset += headSize
+		dataLength -= headSize
+		a.hasSentHeader = true
+	}
+	const blockSize = 4096
+	for dataLength > blockSize {
+		a.buffer.Write(a.packData(plainData[offset : offset+blockSize]))
+		offset += blockSize
+		dataLength -= blockSize
+	}
+	if dataLength > 0 {
+		a.buffer.Write(a.packData(plainData[offset:]))
+	}
+
+	return a.buffer.Bytes(), nil
+}
+
+func (a *authSHA1v4) PostDecrypt(plainData []byte) (outData []byte, n int, err error) {
+	a.buffer.Reset()
+	dataLength := len(plainData)
+	plainLength := dataLength
+	for dataLength > 4 {
+		crc32 := ssr.CalcCRC32(plainData, 2, 0xFFFFFFFF)
+		if binary.LittleEndian.Uint16(plainData[2:4]) != uint16(crc32&0xFFFF) {
+			//common.Error("auth_sha1_v4 post decrypt data crc32 error")
+			return nil, 0, ssr.ErrAuthSHA1v4CRC32Error
+		}
+		length := int(binary.BigEndian.Uint16(plainData[0:2]))
+		if length >= 8192 || length < 8 {
+			//common.Error("auth_sha1_v4 post decrypt data length error")
+			dataLength = 0
+			plainData = nil
+			return nil, 0, ssr.ErrAuthSHA1v4DataLengthError
+		}
+		if length > dataLength {
+			break
+		}
+
+		if ssr.CheckAdler32(plainData, length) {
+			pos := int(plainData[4])
+			if pos != 0xFF {
+				pos += 4
+			} else {
+				pos = int(binary.BigEndian.Uint16(plainData[5:5+2])) + 4
+			}
+			outLength := length - pos - 4
+			a.buffer.Write(plainData[pos : pos+outLength])
+			dataLength -= length
+			plainData = plainData[length:]
+		} else {
+			//common.Error("auth_sha1_v4 post decrypt incorrect checksum")
+			dataLength = 0
+			plainData = nil
+			return nil, 0, ssr.ErrAuthSHA1v4IncorrectChecksum
+		}
+	}
+	return a.buffer.Bytes(), plainLength - dataLength, nil
+}
+
+func (a *authSHA1v4) GetOverhead() int {
+	return 7
+}

proxy/ssr/internal/protocol/base.go

@@ -0,0 +1,47 @@
+package protocol
+
+import (
+	"strings"
+	"sync"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+type creator func() IProtocol
+
+var (
+	creatorMap = make(map[string]creator)
+)
+
+type hmacMethod func(key []byte, data []byte) []byte
+type hashDigestMethod func(data []byte) []byte
+type rndMethod func(dataLength int, random *tools.Shift128plusContext, lastHash []byte, dataSizeList, dataSizeList2 []int, overhead int) int
+
+type IProtocol interface {
+	SetServerInfo(s *ssr.ServerInfo)
+	GetServerInfo() *ssr.ServerInfo
+	PreEncrypt(data []byte) ([]byte, error)
+	PostDecrypt(data []byte) ([]byte, int, error)
+	SetData(data any)
+	GetData() any
+	GetOverhead() int
+}
+
+type AuthData struct {
+	clientID     []byte
+	connectionID uint32
+	mutex        sync.Mutex
+}
+
+func register(name string, c creator) {
+	creatorMap[name] = c
+}
+
+func NewProtocol(name string) IProtocol {
+	c, ok := creatorMap[strings.ToLower(name)]
+	if ok {
+		return c()
+	}
+	return nil
+}

proxy/ssr/internal/protocol/origin.go

@@ -0,0 +1,46 @@
+package protocol
+
+import (
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+func init() {
+	register("origin", NewOrigin)
+}
+
+type origin struct {
+	ssr.ServerInfo
+}
+
+func NewOrigin() IProtocol {
+	a := &origin{}
+	return a
+}
+
+func (o *origin) SetServerInfo(s *ssr.ServerInfo) {
+	o.ServerInfo = *s
+}
+
+func (o *origin) GetServerInfo() (s *ssr.ServerInfo) {
+	return &o.ServerInfo
+}
+
+func (o *origin) PreEncrypt(data []byte) (encryptedData []byte, err error) {
+	return data, nil
+}
+
+func (o *origin) PostDecrypt(data []byte) ([]byte, int, error) {
+	return data, len(data), nil
+}
+
+func (o *origin) SetData(data any) {
+
+}
+
+func (o *origin) GetData() any {
+	return nil
+}
+
+func (o *origin) GetOverhead() int {
+	return 0
+}

proxy/ssr/internal/protocol/verify_sha1.go

@@ -0,0 +1,105 @@
+package protocol
+
+import (
+	"bytes"
+	"encoding/binary"
+
+	"github.com/nadoo/glider/proxy/ssr/internal/ssr"
+	"github.com/nadoo/glider/proxy/ssr/internal/tools"
+)
+
+func init() {
+	register("verify_sha1", NewVerifySHA1)
+	register("ota", NewVerifySHA1)
+}
+
+type verifySHA1 struct {
+	ssr.ServerInfo
+	hasSentHeader bool
+	buffer        bytes.Buffer
+	chunkId       uint32
+}
+
+const (
+	oneTimeAuthMask byte = 0x10
+)
+
+func NewVerifySHA1() IProtocol {
+	a := &verifySHA1{}
+	return a
+}
+
+func (v *verifySHA1) otaConnectAuth(data []byte) []byte {
+	return append(data, tools.HmacSHA1(append(v.IV, v.Key...), data)...)
+}
+
+func (v *verifySHA1) otaReqChunkAuth(chunkId uint32, data []byte) []byte {
+	nb := make([]byte, 2)
+	binary.BigEndian.PutUint16(nb, uint16(len(data)))
+	chunkIdBytes := make([]byte, 4)
+	binary.BigEndian.PutUint32(chunkIdBytes, chunkId)
+	header := append(nb, tools.HmacSHA1(append(v.IV, chunkIdBytes...), data)...)
+	return append(header, data...)
+}
+
+func (v *verifySHA1) otaVerifyAuth(iv []byte, chunkId uint32, data []byte, expectedHmacSha1 []byte) bool {
+	chunkIdBytes := make([]byte, 4)
+	binary.BigEndian.PutUint32(chunkIdBytes, chunkId)
+	actualHmacSha1 := tools.HmacSHA1(append(iv, chunkIdBytes...), data)
+	return bytes.Equal(expectedHmacSha1, actualHmacSha1)
+}
+
+func (v *verifySHA1) getAndIncreaseChunkId() (chunkId uint32) {
+	chunkId = v.chunkId
+	v.chunkId += 1
+	return
+}
+
+func (v *verifySHA1) SetServerInfo(s *ssr.ServerInfo) {
+	v.ServerInfo = *s
+}
+
+func (v *verifySHA1) GetServerInfo() (s *ssr.ServerInfo) {
+	return &v.ServerInfo
+}
+
+func (v *verifySHA1) SetData(data any) {
+
+}
+
+func (v *verifySHA1) GetData() any {
+	return nil
+}
+
+func (v *verifySHA1) PreEncrypt(data []byte) (encryptedData []byte, err error) {
+	v.buffer.Reset()
+	dataLength := len(data)
+	offset := 0
+	if !v.hasSentHeader {
+		data[0] |= oneTimeAuthMask
+		v.buffer.Write(v.otaConnectAuth(data[:v.HeadLen]))
+		v.hasSentHeader = true
+		dataLength -= v.HeadLen
+		offset += v.HeadLen
+	}
+	const blockSize = 4096
+	for dataLength > blockSize {
+		chunkId := v.getAndIncreaseChunkId()
+		v.buffer.Write(v.otaReqChunkAuth(chunkId, data[offset:offset+blockSize]))
+		dataLength -= blockSize
+		offset += blockSize
+	}
+	if dataLength > 0 {
+		chunkId := v.getAndIncreaseChunkId()
+		v.buffer.Write(v.otaReqChunkAuth(chunkId, data[offset:]))
+	}
+	return v.buffer.Bytes(), nil
+}
+
+func (v *verifySHA1) PostDecrypt(data []byte) ([]byte, int, error) {
+	return data, len(data), nil
+}
+
+func (v *verifySHA1) GetOverhead() int {
+	return 0
+}

proxy/ssr/internal/ssr/adler32.go

@@ -0,0 +1,31 @@
+package ssr
+
+import "encoding/binary"
+
+func calcShortAdler32(input []byte, a, b uint32) (uint32, uint32) {
+	for _, i := range input {
+		a += uint32(i)
+		b += a
+	}
+	a %= 65521
+	b %= 65521
+	return a, b
+}
+
+func CalcAdler32(input []byte) uint32 {
+	var a uint32 = 1
+	var b uint32 = 0
+	const nMax = 5552
+	for length := len(input); length > nMax; length -= nMax {
+		a, b = calcShortAdler32(input[:nMax], a, b)
+		input = input[nMax:]
+	}
+	a, b = calcShortAdler32(input, a, b)
+	return (b << 16) + a
+}
+
+func CheckAdler32(input []byte, l int) bool {
+	adler32 := CalcAdler32(input[:l-4])
+	checksum := binary.LittleEndian.Uint32(input[l-4:])
+	return adler32 == checksum
+}

proxy/ssr/internal/ssr/crc32.go

@@ -0,0 +1,52 @@
+package ssr
+
+import "encoding/binary"
+
+var (
+	crc32Table = make([]uint32, 256)
+)
+
+func init() {
+	createCRC32Table()
+}
+
+func createCRC32Table() {
+	for i := range 256 {
+		crc := uint32(i)
+		for j := 8; j > 0; j-- {
+			if crc&1 == 1 {
+				crc = (crc >> 1) ^ 0xEDB88320
+			} else {
+				crc >>= 1
+			}
+		}
+		crc32Table[i] = crc
+	}
+}
+
+func CalcCRC32(input []byte, length int, value uint32) uint32 {
+	value = 0xFFFFFFFF
+	return DoCalcCRC32(input, 0, length, value)
+}
+
+func DoCalcCRC32(input []byte, index int, length int, value uint32) uint32 {
+	buffer := input
+	for i := index; i < length; i++ {
+		value = (value >> 8) ^ crc32Table[byte(value&0xFF)^buffer[i]]
+	}
+	return value ^ 0xFFFFFFFF
+}
+
+func DoSetCRC32(buffer []byte, index int, length int) {
+	crc := CalcCRC32(buffer[:length-4], length-4, 0xFFFFFFFF)
+	binary.LittleEndian.PutUint32(buffer[length-4:], crc^0xFFFFFFFF)
+}
+
+func SetCRC32(buffer []byte, length int) {
+	DoSetCRC32(buffer, 0, length)
+}
+
+func CheckCRC32(buffer []byte, length int) bool {
+	crc := CalcCRC32(buffer, length, 0xFFFFFFFF)
+	return crc == 0xFFFFFFFF
+}

proxy/ssr/internal/ssr/obfs.go

@@ -0,0 +1,59 @@
+package ssr
+
+import "errors"
+
+const ObfsHMACSHA1Len = 10
+
+var (
+	ErrAuthSHA1v4CRC32Error                = errors.New("auth_sha1_v4 post decrypt data crc32 error")
+	ErrAuthSHA1v4DataLengthError           = errors.New("auth_sha1_v4 post decrypt data length error")
+	ErrAuthSHA1v4IncorrectChecksum         = errors.New("auth_sha1_v4 post decrypt incorrect checksum")
+	ErrAuthAES128IncorrectHMAC             = errors.New("auth_aes128_* post decrypt incorrect hmac")
+	ErrAuthAES128DataLengthError           = errors.New("auth_aes128_* post decrypt length mismatch")
+	ErrAuthChainDataLengthError            = errors.New("auth_chain_* post decrypt length mismatch")
+	ErrAuthChainIncorrectHMAC              = errors.New("auth_chain_* post decrypt incorrect hmac")
+	ErrAuthAES128IncorrectChecksum         = errors.New("auth_aes128_* post decrypt incorrect checksum")
+	ErrAuthAES128PosOutOfRange             = errors.New("auth_aes128_* post decrypt pos out of range")
+	ErrTLS12TicketAuthTooShortData         = errors.New("tls1.2_ticket_auth too short data")
+	ErrTLS12TicketAuthHMACError            = errors.New("tls1.2_ticket_auth hmac verifying failed")
+	ErrTLS12TicketAuthIncorrectMagicNumber = errors.New("tls1.2_ticket_auth incorrect magic number")
+)
+
+type ServerInfo struct {
+	Host      string
+	Port      uint16
+	Param     string
+	IV        []byte
+	IVLen     int
+	RecvIV    []byte
+	RecvIVLen int
+	Key       []byte
+	KeyLen    int
+	HeadLen   int
+	TcpMss    int
+	Overhead  int
+}
+
+func GetHeadSize(data []byte, defaultValue int) int {
+	if data == nil || len(data) < 2 {
+		return defaultValue
+	}
+	headType := data[0] & 0x07
+	switch headType {
+	case 1:
+		// IPv4 1+4+2
+		return 7
+	case 4:
+		// IPv6 1+16+2
+		return 19
+	case 3:
+		// domain name, variant length
+		return 4 + int(data[1])
+	}
+
+	return defaultValue
+}
+
+func (s *ServerInfo) SetHeadLen(data []byte, defaultValue int) {
+	s.HeadLen = GetHeadSize(data, defaultValue)
+}

proxy/ssr/internal/tools/encrypt.go

@@ -0,0 +1,51 @@
+package tools
+
+import (
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/sha1"
+)
+
+func HmacMD5(key []byte, data []byte) []byte {
+	hmacMD5 := hmac.New(md5.New, key)
+	hmacMD5.Write(data)
+	return hmacMD5.Sum(nil)[:16]
+}
+
+func HmacSHA1(key []byte, data []byte) []byte {
+	hmacSHA1 := hmac.New(sha1.New, key)
+	hmacSHA1.Write(data)
+	return hmacSHA1.Sum(nil)[:20]
+}
+
+func MD5Sum(d []byte) []byte {
+	h := md5.New()
+	h.Write(d)
+	return h.Sum(nil)
+}
+
+func SHA1Sum(d []byte) []byte {
+	h := sha1.New()
+	h.Write(d)
+	return h.Sum(nil)
+}
+
+func EVPBytesToKey(password string, keyLen int) (key []byte) {
+	const md5Len = 16
+
+	cnt := (keyLen-1)/md5Len + 1
+	m := make([]byte, cnt*md5Len)
+	copy(m, MD5Sum([]byte(password)))
+
+	// Repeatedly call md5 until bytes generated is enough.
+	// Each call to md5 uses data: prev md5 sum + password.
+	d := make([]byte, md5Len+len(password))
+	start := 0
+	for i := 1; i < cnt; i++ {
+		start += md5Len
+		copy(d, m[start-md5Len:start])
+		copy(d[md5Len:], password)
+		copy(m[start:], MD5Sum(d))
+	}
+	return m[:keyLen]
+}

proxy/ssr/internal/tools/obfsutil.go

@@ -0,0 +1,53 @@
+package tools
+
+import (
+	"encoding/binary"
+	"unsafe"
+)
+
+func IsLittleEndian() bool {
+	const N int = int(unsafe.Sizeof(0))
+	x := 0x1234
+	p := unsafe.Pointer(&x)
+	p2 := (*[N]byte)(p)
+	if p2[0] == 0 {
+		return false
+	} else {
+		return true
+	}
+}
+
+type Shift128plusContext struct {
+	v [2]uint64
+}
+
+func (ctx *Shift128plusContext) InitFromBin(bin []byte) {
+	var fillBin [16]byte
+	copy(fillBin[:], bin)
+
+	ctx.v[0] = binary.LittleEndian.Uint64(fillBin[:8])
+	ctx.v[1] = binary.LittleEndian.Uint64(fillBin[8:])
+}
+
+func (ctx *Shift128plusContext) InitFromBinDatalen(bin []byte, datalen int) {
+	var fillBin [16]byte
+	copy(fillBin[:], bin)
+	binary.LittleEndian.PutUint16(fillBin[:2], uint16(datalen))
+
+	ctx.v[0] = binary.LittleEndian.Uint64(fillBin[:8])
+	ctx.v[1] = binary.LittleEndian.Uint64(fillBin[8:])
+
+	for range 4 {
+		ctx.Next()
+	}
+}
+
+func (ctx *Shift128plusContext) Next() uint64 {
+	x := ctx.v[0]
+	y := ctx.v[1]
+	ctx.v[0] = y
+	x ^= x << 23
+	x ^= y ^ (x >> 17) ^ (y >> 26)
+	ctx.v[1] = x
+	return x + y
+}

proxy/ssr/ssr.go

@@ -0,0 +1,164 @@
+package ssr
+
+import (
+	"errors"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"github.com/nadoo/glider/pkg/log"
+	"github.com/nadoo/glider/pkg/socks"
+	"github.com/nadoo/glider/proxy"
+
+	"github.com/nadoo/glider/proxy/ssr/internal"
+	"github.com/nadoo/glider/proxy/ssr/internal/cipher"
+	"github.com/nadoo/glider/proxy/ssr/internal/obfs"
+	"github.com/nadoo/glider/proxy/ssr/internal/protocol"
+	ssrinfo "github.com/nadoo/glider/proxy/ssr/internal/ssr"
+)
+
+func init() {
+	proxy.RegisterDialer("ssr", NewSSRDialer)
+}
+
+// SSR struct.
+type SSR struct {
+	dialer proxy.Dialer
+	addr   string
+
+	EncryptMethod   string
+	EncryptPassword string
+	Obfs            string
+	ObfsParam       string
+	ObfsData        any
+	Protocol        string
+	ProtocolParam   string
+	ProtocolData    any
+}
+
+// NewSSR returns a shadowsocksr proxy, ssr://method:pass@host:port/query
+func NewSSR(s string, d proxy.Dialer) (*SSR, error) {
+	u, err := url.Parse(s)
+	if err != nil {
+		log.F("[ssr] parse err: %s", err)
+		return nil, err
+	}
+
+	addr := u.Host
+	method := u.User.Username()
+	pass, _ := u.User.Password()
+
+	p := &SSR{
+		dialer:          d,
+		addr:            addr,
+		EncryptMethod:   method,
+		EncryptPassword: pass,
+	}
+
+	query := u.Query()
+	p.Protocol = query.Get("protocol")
+	p.ProtocolParam = query.Get("protocol_param")
+	p.Obfs = query.Get("obfs")
+	p.ObfsParam = query.Get("obfs_param")
+
+	p.ProtocolData = new(protocol.AuthData)
+
+	return p, nil
+}
+
+// NewSSRDialer returns a ssr proxy dialer.
+func NewSSRDialer(s string, d proxy.Dialer) (proxy.Dialer, error) {
+	return NewSSR(s, d)
+}
+
+// Addr returns forwarder's address
+func (s *SSR) Addr() string {
+	if s.addr == "" {
+		return s.dialer.Addr()
+	}
+	return s.addr
+}
+
+// Dial connects to the address addr on the network net via the proxy.
+func (s *SSR) Dial(network, addr string) (net.Conn, error) {
+	target := socks.ParseAddr(addr)
+	if target == nil {
+		return nil, errors.New("[ssr] unable to parse address: " + addr)
+	}
+
+	cipher, err := cipher.NewStreamCipher(s.EncryptMethod, s.EncryptPassword)
+	if err != nil {
+		return nil, err
+	}
+
+	c, err := s.dialer.Dial("tcp", s.addr)
+	if err != nil {
+		log.F("[ssr] dial to %s error: %s", s.addr, err)
+		return nil, err
+	}
+
+	ssrconn := internal.NewSSTCPConn(c, cipher)
+	if ssrconn.Conn == nil || ssrconn.RemoteAddr() == nil {
+		return nil, errors.New("[ssr] nil connection")
+	}
+
+	// should initialize obfs/protocol now
+	rs := strings.Split(ssrconn.RemoteAddr().String(), ":")
+	port, _ := strconv.Atoi(rs[1])
+
+	ssrconn.IObfs = obfs.NewObfs(s.Obfs)
+	if ssrconn.IObfs == nil {
+		return nil, errors.New("[ssr] unsupported obfs type: " + s.Obfs)
+	}
+
+	obfsServerInfo := &ssrinfo.ServerInfo{
+		Host:   rs[0],
+		Port:   uint16(port),
+		TcpMss: 1460,
+		Param:  s.ObfsParam,
+	}
+	ssrconn.IObfs.SetServerInfo(obfsServerInfo)
+
+	ssrconn.IProtocol = protocol.NewProtocol(s.Protocol)
+	if ssrconn.IProtocol == nil {
+		return nil, errors.New("[ssr] unsupported protocol type: " + s.Protocol)
+	}
+
+	protocolServerInfo := &ssrinfo.ServerInfo{
+		Host:   rs[0],
+		Port:   uint16(port),
+		TcpMss: 1460,
+		Param:  s.ProtocolParam,
+	}
+	ssrconn.IProtocol.SetServerInfo(protocolServerInfo)
+
+	if s.ObfsData == nil {
+		s.ObfsData = ssrconn.IObfs.GetData()
+	}
+	ssrconn.IObfs.SetData(s.ObfsData)
+
+	if s.ProtocolData == nil {
+		s.ProtocolData = ssrconn.IProtocol.GetData()
+	}
+	ssrconn.IProtocol.SetData(s.ProtocolData)
+
+	if _, err := ssrconn.Write(target); err != nil {
+		ssrconn.Close()
+		return nil, err
+	}
+
+	return ssrconn, err
+}
+
+// DialUDP connects to the given address via the proxy.
+func (s *SSR) DialUDP(network, addr string) (net.PacketConn, error) {
+	return nil, proxy.ErrNotSupported
+}
+
+func init() {
+	proxy.AddUsage("ssr", `
+SSR scheme:
+  ssr://method:pass@host:port?protocol=xxx&protocol_param=yyy&obfs=zzz&obfs_param=xyz
+`)
+}