For Android

README.md

@@ -25,11 +25,13 @@ Evan 增强版特性
 * HTTP CONNECT方法支持自定义Host(常用于免流混淆)
   - 例子: gost -L http://:8888 -F http://evan.run:80?host=cdn.dingding.com -F socks5://127.0.0.1:1080
 * 修改默认User Agent为Google默认浏览器的UA,修改代理默认UA为nginx
-* 兼容Android环境,针对Android环境下无法解析域名的问题(Android环境下默认使用114.114.114.114作为DNS,可使用启动参数-NS自定义)
+* ~~兼容Android环境,针对Android环境下无法解析域名的问题(Android环境下默认使用114.114.114.114作为DNS,可使用启动参数-NS自定义)~~
+  - Android使用NDK交叉编译可以解决DNS无法解析问题,默认114.114.114.114的配置已经移除,-NS参数保留,交叉编译参考buildAndroid.sh
   - 例子: gost -L http://:8888 -F http://evan.run:80 -NS 114.114.114.114:53/udp
 * 修复原版DNS解析的BUG
 * 修复原版websocket协议中path参数不解码后发送问题
 * TLS握手指纹增强:使用chrome的TLS指纹特征来对抗TLS指纹识别检测
+* TLS握手指纹兼容性改进:由于Chrome的默认TLS ClientHello握手中默认的ALPN为H2+HTTP/1.1,而Go的默认握手请求中是不包含ALPN的,故会导致兼容性问题,可以使用```h2Alpn=false```选项强制关闭HTTP2的ALPN(握手请求降级为Chrome默认的WebSocket请求)
 
 初步防检测防杀毒处理脚本
 ------

buildAndroid.sh

@@ -0,0 +1,27 @@
+NDK_VERSION_IF_MISSING=r23b
+mkdir -p ndk
+cd ndk
+curl https://dl.google.com/android/repository/android-ndk-${NDK_VERSION_IF_MISSING}-linux.zip -L -o ndk.zip
+unzip ndk.zip > /dev/null || exit $?
+rm -f ndk.zip
+[ ! -d android-ndk-${NDK_VERSION_IF_MISSING} ] && echo "Missing directory: android-ndk-${NDK_VERSION_IF_MISSING}" && exit 1
+export ANDROID_NDK_ROOT=$PWD/android-ndk-${NDK_VERSION_IF_MISSING}
+cd ..
+fi
+echo "ANDROID_NDK_ROOT=$ANDROID_NDK_ROOT"
+cd gost
+CC=$(find $ANDROID_NDK_ROOT | grep 'armv7a-linux-androideabi23-clang$') \
+GOOS="android" GOARCH="arm" CGO_ENABLED="1" \
+go build -buildvcs=false -ldflags "-s -w" -a -o gost_android_arm
+
+CC=$(find $ANDROID_NDK_ROOT | grep 'aarch64-linux-android23-clang$') \
+GOOS="android" GOARCH="arm64" CGO_ENABLED="1" \
+go build -buildvcs=false -ldflags "-s -w" -a -o gost_android_arm64
+
+CC=$(find $ANDROID_NDK_ROOT | grep 'i686-linux-android23-clang$') \
+GOOS="android" GOARCH="386" CGO_ENABLED="1" \
+go build -buildvcs=false -ldflags "-s -w" -a -o gost_android_x86
+
+CC=$(find $ANDROID_NDK_ROOT | grep 'x86_64-linux-android23-clang$') \
+GOOS="android" GOARCH="amd64" CGO_ENABLED="1" \
+go build -buildvcs=false -ldflags "-s -w" -a -o gost_android_x86_64

client.go

@@ -85,6 +85,7 @@ type DialOptions struct {
 	Chain        *Chain
 	Host         string
 	HeaderConfig map[string]string
+	H2Alpn       bool
 }
 
 // DialOption allows a common way to set DialOptions.
@@ -118,6 +119,13 @@ func HeaderConfigDialOption(HeaderConfig map[string]string) DialOption {
 	}
 }
 
+// H2AlpnDialOption specifies is use HTTP2 in ALPN for TLS ClientHello
+func H2AlpnDialOption(useH2Alpn bool) DialOption {
+	return func(opts *DialOptions) {
+		opts.H2Alpn = useH2Alpn
+	}
+}
+
 // HandshakeOptions describes the options for handshake.
 type HandshakeOptions struct {
 	Addr       string
@@ -131,6 +139,7 @@ type HandshakeOptions struct {
 	KCPConfig  *KCPConfig
 	QUICConfig *QUICConfig
 	SSHConfig  *SSHConfig
+	H2Alpn     bool
 }
 
 // HandshakeOption allows a common way to set HandshakeOptions.
@@ -213,6 +222,13 @@ func SSHConfigHandshakeOption(config *SSHConfig) HandshakeOption {
 	}
 }
 
+// H2AlpnHandshakeOption specifies is use HTTP2 in ALPN for TLS ClientHello.
+func H2AlpnHandshakeOption(useH2Alpn bool) HandshakeOption {
+	return func(opts *HandshakeOptions) {
+		opts.H2Alpn = useH2Alpn
+	}
+}
+
 // ConnectOptions describes the options for Connector.Connect.
 type ConnectOptions struct {
 	Addr         string

cmd/gost/main.go

@@ -1,12 +1,10 @@
 package main
 
 import (
-	"context"
 	"crypto/tls"
 	"errors"
 	"flag"
 	"fmt"
-	"net"
 	"net/http"
 	"os"
 	"runtime"
@@ -91,12 +89,6 @@ func main() {
 	if baseCfg.ExternalResolver != "" {
 		gost.DefaultExternalResolver = parseResolver(baseCfg.ExternalResolver)
 		gost.DefaultExternalResolver.Init()
-	} else if os.Getenv("ANDROID_ROOT") != "" {
-		log.Logf("Android detected modify default DNS server to %v", gost.DefaultDNSServer)
-		net.DefaultResolver = &net.Resolver{Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
-			d := net.Dialer{}
-			return d.DialContext(ctx, network, gost.DefaultDNSServer)
-		}, PreferGo: true}
 	}
 
 	if err := start(); err != nil {

cmd/gost/route.go

@@ -291,10 +291,17 @@ func parseChainNode(ns string) (nodes []gost.Node, err error) {
 
 	}
 
+	h2AlpnStr := node.Get("h2Alpn")
+	h2Alpn := true
+	if h2AlpnStr != "" {
+		h2Alpn = node.GetBool("h2Alpn")
+	}
+
 	node.DialOptions = append(node.DialOptions,
 		gost.TimeoutDialOption(timeout),
 		gost.HostDialOption(host),
 		gost.HeaderConfigDialOption(headerCfg),
+		gost.H2AlpnDialOption(h2Alpn),
 	)
 
 	node.ConnectOptions = []gost.ConnectOption{
@@ -322,6 +329,7 @@ func parseChainNode(ns string) (nodes []gost.Node, err error) {
 		gost.TimeoutHandshakeOption(timeout),
 		gost.RetryHandshakeOption(node.GetInt("retry")),
 		gost.SSHConfigHandshakeOption(sshConfig),
+		gost.H2AlpnHandshakeOption(h2Alpn),
 	}
 
 	node.Client = &gost.Client{

gost.go

@@ -20,7 +20,7 @@ import (
 )
 
 // Version is the gost version.
-const Version = "2.11.2-EvanMod-v1.2.2"
+const Version = "2.11.2-EvanMod-v1.2.3"
 const ProxyAgent = "nginx"
 
 // Debug is a flag that enables the debug log.

http2.go

@@ -161,7 +161,7 @@ func (tr *http2Transporter) Dial(addr string, options ...DialOption) (net.Conn,
 				if err != nil {
 					return nil, err
 				}
-				return wrapTLSClient(conn, cfg, timeout)
+				return wrapTLSClient(conn, cfg, timeout, opts.H2Alpn)
 			},
 		}
 		client = &http.Client{
@@ -242,7 +242,7 @@ func (tr *h2Transporter) Dial(addr string, options ...DialOption) (net.Conn, err
 				if tr.tlsConfig == nil {
 					return conn, nil
 				}
-				return wrapTLSClient(conn, cfg, timeout)
+				return wrapTLSClient(conn, cfg, timeout, opts.H2Alpn)
 			},
 		}
 		client = &http.Client{

log.go

@@ -3,10 +3,12 @@ package gost
 import (
 	"fmt"
 	"log"
+	"os"
 )
 
 func init() {
 	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	log.SetOutput(os.Stdout)
 }
 
 // LogLogger uses the standard log package as the logger

strong_mod.sh

@@ -1,2 +1,6 @@
 sed -b -i s/\*gost./*evan./g $1
 sed -b -i s/]gost./]evan./g $1
+sed -b -i s#ginuerzh/gost#evanevan/evan#g $1
+sed -b -i s#go-gost#ev-evan#g $1
+sed -b -i s#gost.#evan.#g $1
+sed -b -i s#cmd/gost#cmd/evan#g $1

tls.go

@@ -36,7 +36,7 @@ func (tr *tlsTransporter) Handshake(conn net.Conn, options ...HandshakeOption) (
 		timeout = HandshakeTimeout
 	}
 
-	return wrapTLSClient(conn, opts.TLSConfig, timeout)
+	return wrapTLSClient(conn, opts.TLSConfig, timeout, opts.H2Alpn)
 }
 
 type mtlsTransporter struct {
@@ -131,7 +131,7 @@ func (tr *mtlsTransporter) initSession(addr string, conn net.Conn, opts *Handsha
 	if opts.TLSConfig == nil {
 		opts.TLSConfig = &tls.Config{InsecureSkipVerify: true}
 	}
-	conn, err := wrapTLSClient(conn, opts.TLSConfig, opts.Timeout)
+	conn, err := wrapTLSClient(conn, opts.TLSConfig, opts.Timeout, opts.H2Alpn)
 	if err != nil {
 		return nil, err
 	}
@@ -268,7 +268,7 @@ func (l *mtlsListener) Close() error {
 //
 // This code is taken from consul:
 // https://github.com/hashicorp/consul/blob/master/tlsutil/config.go
-func wrapTLSClient(conn net.Conn, tlsConfig *tls.Config, timeout time.Duration) (net.Conn, error) {
+func wrapTLSClient(conn net.Conn, tlsConfig *tls.Config, timeout time.Duration, h2Alpn bool) (net.Conn, error) {
 	var err error
 
 	if timeout <= 0 {
@@ -279,7 +279,26 @@ func wrapTLSClient(conn net.Conn, tlsConfig *tls.Config, timeout time.Duration)
 	defer conn.SetDeadline(time.Time{})
 
 	//tlsConn := tls.Client(conn, tlsConfig)
-	tlsConn := utls.UClient(conn, &utls.Config{InsecureSkipVerify: tlsConfig.InsecureSkipVerify, ServerName: tlsConfig.ServerName}, utls.HelloChrome_Auto)
+	var tlsConn *utls.UConn
+
+	utlsConf := &utls.Config{InsecureSkipVerify: tlsConfig.InsecureSkipVerify, ServerName: tlsConfig.ServerName, ClientAuth: utls.ClientAuthType(tlsConfig.ClientAuth), ClientCAs: tlsConfig.ClientCAs, RootCAs: tlsConfig.RootCAs}
+	if len(tlsConfig.Certificates) > 0 {
+		for _, certificate := range tlsConfig.Certificates {
+			utlsConf.Certificates = append(utlsConf.Certificates, utls.Certificate{
+				Certificate:                 certificate.Certificate,
+				PrivateKey:                  certificate.PrivateKey,
+				OCSPStaple:                  certificate.OCSPStaple,
+				SignedCertificateTimestamps: certificate.SignedCertificateTimestamps,
+				Leaf:                        certificate.Leaf,
+			})
+		}
+	}
+	if h2Alpn {
+		tlsConn = utls.UClient(conn, utlsConf, utls.HelloChrome_Auto)
+	} else {
+		tlsConn = utls.UClient(conn, utlsConf, utls.HelloCustom)
+		tlsConn.ApplyPreset(newWsSpec())
+	}
 
 	// Otherwise perform handshake, but don't verify the domain
 	//

ws.go

@@ -744,28 +744,8 @@ type websocketConn struct {
 	rb   []byte
 }
 
-func websocketClientConn(url string, conn net.Conn, tlsConfig *tls.Config, options *WSOptions) (net.Conn, error) {
+func newWsSpec() *utls.ClientHelloSpec {
-	if options == nil {
+	return &utls.ClientHelloSpec{
-		options = &WSOptions{}
-	}
-
-	timeout := options.HandshakeTimeout
-	if timeout <= 0 {
-		timeout = HandshakeTimeout
-	}
-
-	dialer := websocket.Dialer{
-		ReadBufferSize:    options.ReadBufferSize,
-		WriteBufferSize:   options.WriteBufferSize,
-		TLSClientConfig:   tlsConfig,
-		HandshakeTimeout:  timeout,
-		EnableCompression: options.EnableCompression,
-		NetDial: func(net, addr string) (net.Conn, error) {
-			return conn, nil
-		},
-		NetDialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-			client := utls.UClient(conn, &utls.Config{InsecureSkipVerify: tlsConfig.InsecureSkipVerify, ServerName: tlsConfig.ServerName}, utls.HelloCustom)
-			client.ApplyPreset(&utls.ClientHelloSpec{
 		CipherSuites: []uint16{
 			utls.GREASE_PLACEHOLDER,
 			utls.TLS_AES_128_GCM_SHA256,
@@ -834,7 +814,43 @@ func websocketClientConn(url string, conn net.Conn, tlsConfig *tls.Config, optio
 			&utls.UtlsGREASEExtension{},
 			&utls.UtlsPaddingExtension{GetPaddingLen: utls.BoringPaddingStyle},
 		},
+	}
+}
+
+func websocketClientConn(url string, conn net.Conn, tlsConfig *tls.Config, options *WSOptions) (net.Conn, error) {
+	if options == nil {
+		options = &WSOptions{}
+	}
+
+	timeout := options.HandshakeTimeout
+	if timeout <= 0 {
+		timeout = HandshakeTimeout
+	}
+
+	dialer := websocket.Dialer{
+		ReadBufferSize:    options.ReadBufferSize,
+		WriteBufferSize:   options.WriteBufferSize,
+		TLSClientConfig:   tlsConfig,
+		HandshakeTimeout:  timeout,
+		EnableCompression: options.EnableCompression,
+		NetDial: func(net, addr string) (net.Conn, error) {
+			return conn, nil
+		},
+		NetDialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+			utlsConf := &utls.Config{InsecureSkipVerify: tlsConfig.InsecureSkipVerify, ServerName: tlsConfig.ServerName, ClientAuth: utls.ClientAuthType(tlsConfig.ClientAuth), ClientCAs: tlsConfig.ClientCAs, RootCAs: tlsConfig.RootCAs}
+			if len(tlsConfig.Certificates) > 0 {
+				for _, certificate := range tlsConfig.Certificates {
+					utlsConf.Certificates = append(utlsConf.Certificates, utls.Certificate{
+						Certificate:                 certificate.Certificate,
+						PrivateKey:                  certificate.PrivateKey,
+						OCSPStaple:                  certificate.OCSPStaple,
+						SignedCertificateTimestamps: certificate.SignedCertificateTimestamps,
+						Leaf:                        certificate.Leaf,
 					})
+				}
+			}
+			client := utls.UClient(conn, utlsConf, utls.HelloCustom)
+			client.ApplyPreset(newWsSpec())
 			err := client.Handshake()
 			if err != nil {
 				return nil, err