Support go1.21

The QUIC protocol has been supported in standard library since go1.21 release. But the trick to use tls.Server for reading SNI has not been supported yet. This commit changes the code to parse the raw tls handshake message, thus allowing support for go1.21 and above.
cuonglm · Jun 20, 2024 · 9e9d9cf · 9e9d9cf
1 parent bb363f7
commit 9e9d9cf
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Showing 9 changed files with 57 additions and 153 deletions.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [ '1.19.x', '1.20.x' ]
+        go-version: [ '1.21.x', '1.22.x' ]
     steps:
       - uses: actions/checkout@v3
       - name: Setup Go ${{ matrix.go-version }}

diff --git a/client_hello.go b/client_hello.go
@@ -7,9 +7,9 @@ import (
 	"errors"
 	"fmt"
 
-	"golang.org/x/crypto/hkdf"
-
 	"github.com/quic-go/quic-go/quicvarint"
+	"golang.org/x/crypto/hkdf"
+	"src.agwa.name/tlshacks"
 )
 
 // ReadClientHello parses the packet and return *tls.ClientHelloInfo if found.
@@ -37,21 +37,11 @@ func ReadClientHello(packet []byte) (*tls.ClientHelloInfo, error) {
 		return nil, err
 	}
 
-	rl := &recordLayer{ch: make(chan []byte, 1)}
-	_, _ = rl.WriteRecord(cr.Data)
-
-	var hello *tls.ClientHelloInfo
-	err = newTLSServer(readOnlyConn{r: bytes.NewReader(cr.Data)}, &tlsConfig{
-		GetConfigForClient: func(argHello *tls.ClientHelloInfo) (*tls.Config, error) {
-			hello = new(tls.ClientHelloInfo)
-			*hello = *argHello
-			return nil, nil
-		},
-	}, &tlsExtraConfig{AlternativeRecordLayer: rl}).Handshake()
-	if hello == nil {
-		return nil, err
+	ch := tlshacks.UnmarshalClientHello(cr.Data)
+	if ch != nil && ch.Info.ServerName != nil {
+		return &tls.ClientHelloInfo{ServerName: *ch.Info.ServerName}, nil
 	}
-	return hello, nil
+	return nil, errors.New("no client hello found")
 }
 
 func findCryptoFrame(br *bytes.Reader) (*CryptoFrame, error) {

diff --git a/client_hello_test.go b/client_hello_test.go
@@ -1,6 +1,7 @@
 package quicsni
 
 import (
+	"context"
 	"crypto/tls"
 	"net"
 	"testing"
@@ -13,10 +14,6 @@ func TestReadClientHello(t *testing.T) {
 		name       string
 		quicConfig *quic.Config
 	}{
-		{
-			"draft29",
-			&quic.Config{Versions: []quic.VersionNumber{quic.VersionDraft29}},
-		},
 		{
 			"v1",
 			&quic.Config{Versions: []quic.VersionNumber{quic.Version1}},
@@ -50,6 +47,7 @@ func runTest(t *testing.T, quicConfig *quic.Config) {
 		tlsConf := &tls.Config{
 			InsecureSkipVerify: true,
 			NextProtos:         []string{"quic"},
+			ServerName:         testHostname,
 		}
 		conn, err := net.ListenUDP("udp", nil)
 		if err != nil {
@@ -59,7 +57,7 @@ func runTest(t *testing.T, quicConfig *quic.Config) {
 		if err != nil {
 			panic(err)
 		}
-		ea, err := quic.Dial(conn, remoteAddr, testHostname, tlsConf, quicConfig)
+		ea, err := quic.Dial(context.Background(), conn, remoteAddr, tlsConf, quicConfig)
 		if err != nil {
 			panic(err)
 		}

diff --git a/go.mod b/go.mod
@@ -1,22 +1,23 @@
-module github.com/cuonglm/quicsni
+module github.com/Windscribe/quicsni
 
-go 1.19
+go 1.21
+
+toolchain go1.22.4
 
 require (
-	github.com/quic-go/qtls-go1-20 v0.2.2
-	github.com/quic-go/quic-go v0.34.0
-	golang.org/x/crypto v0.8.0
+	github.com/quic-go/quic-go v0.44.0
+	golang.org/x/crypto v0.23.0
+	src.agwa.name/tlshacks v0.0.0-20231008131857-90d701ba3225
 )
 
 require (
 	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
-	github.com/golang/mock v1.6.0 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
-	github.com/onsi/ginkgo/v2 v2.9.4 // indirect
-	github.com/quic-go/qtls-go1-19 v0.3.2 // indirect
-	golang.org/x/exp v0.0.0-20221205204356-47842c84f3db // indirect
-	golang.org/x/mod v0.10.0 // indirect
-	golang.org/x/net v0.9.0 // indirect
-	golang.org/x/sys v0.7.0 // indirect
-	golang.org/x/tools v0.8.0 // indirect
+	github.com/onsi/ginkgo/v2 v2.9.5 // indirect
+	go.uber.org/mock v0.4.0 // indirect
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect
+	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/tools v0.21.0 // indirect
 )
diff --git a/go.sum b/go.sum
@@ -5,67 +5,53 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ=
+github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
-github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
-github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
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-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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diff --git a/sniff_conn.go b/sniff_conn.go
diff --git a/tls_go119.go b/tls_go119.go
diff --git a/tls_go120.go b/tls_go120.go
diff --git a/tls_record_layer.go b/tls_record_layer.go