Add server support

infra/conf/transport_internet.go

@@ -414,6 +414,7 @@ type TLSConfig struct {
 	VerifyPeerCertInNames                []string         `json:"verifyPeerCertInNames"`
 	ECHConfig                            string           `json:"echConfig"`
 	ECHDOHServer                         string           `json:"echDohServer"`
+	EchKeySets                           string           `json:"echKeySets"`
 }
 
 // Build implements Buildable.
@@ -492,6 +493,13 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 		}
 		config.EchConfig = ECHConfig
 	}
+	if c.EchKeySets != "" {
+		EchPrivateKey, err := base64.StdEncoding.DecodeString(c.EchKeySets)
+		if err != nil {
+			return nil, errors.New("invalid ECH Config", c.EchKeySets)
+		}
+		config.EchKeySets = EchPrivateKey
+	}
 	config.Ech_DOHserver = c.ECHDOHServer
 
 	return config, nil

main/commands/all/tls/ech.go

@@ -43,8 +43,13 @@ func executeECH(cmd *base.Command, args []string) {
 	echKeySet, err := goech.GenerateECHKeySet(0, *input_serverName, kem, nil)
 	common.Must(err)
 
-	configBuffer, _ := echKeySet.ECHConfig.MarshalBinary()
+	// Make single key set to a list with only one element
-	keyBuffer, _ := echKeySet.MarshalBinary()
+	ECHConfigList := make(goech.ECHConfigList, 1)
+	ECHConfigList[0] = echKeySet.ECHConfig
+	ECHKeySetList := make(goech.ECHKeySetList, 1)
+	ECHKeySetList[0] = echKeySet
+	configBuffer, _ := ECHConfigList.MarshalBinary()
+	keyBuffer, _ := ECHKeySetList.MarshalBinary()
 
 	configPEM := string(pem.EncodeToMemory(&pem.Block{Type: "ECH CONFIGS", Bytes: configBuffer}))
 	keyPEM := string(pem.EncodeToMemory(&pem.Block{Type: "ECH KEYS", Bytes: keyBuffer}))

transport/internet/tls/config.go

@@ -444,7 +444,7 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 			config.KeyLogWriter = writer
 		}
 	}
-	if len(c.EchConfig) > 0 || len(c.Ech_DOHserver) > 0 {
+	if len(c.EchConfig) > 0 || len(c.Ech_DOHserver) > 0 || len(c.EchKeySets) > 0 {
 		err := ApplyECH(c, config)
 		if err != nil {
 			errors.LogError(context.Background(), err)

transport/internet/tls/config.pb.go

@@ -217,8 +217,9 @@ type Config struct {
 	// @Document After allow_insecure (automatically), if the server's cert can't be verified by any of these names, pinned_peer_certificate_chain_sha256 will be tried.
 	// @Critical
 	VerifyPeerCertInNames []string `protobuf:"bytes,17,rep,name=verify_peer_cert_in_names,json=verifyPeerCertInNames,proto3" json:"verify_peer_cert_in_names,omitempty"`
-	EchConfig             []byte   `protobuf:"bytes,20,opt,name=ech_config,json=echConfig,proto3" json:"ech_config,omitempty"`
+	EchConfig             []byte   `protobuf:"bytes,18,opt,name=ech_config,json=echConfig,proto3" json:"ech_config,omitempty"`
-	Ech_DOHserver         string   `protobuf:"bytes,21,opt,name=ech_DOHserver,json=echDOHserver,proto3" json:"ech_DOHserver,omitempty"`
+	Ech_DOHserver         string   `protobuf:"bytes,19,opt,name=ech_DOHserver,json=echDOHserver,proto3" json:"ech_DOHserver,omitempty"`
+	EchKeySets            []byte   `protobuf:"bytes,20,opt,name=ech_key_sets,json=echKeySets,proto3" json:"ech_key_sets,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -377,6 +378,13 @@ func (x *Config) GetEch_DOHserver() string {
 	return ""
 }
 
+func (x *Config) GetEchKeySets() []byte {
+	if x != nil {
+		return x.EchKeySets
+	}
+	return nil
+}
+
 var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_tls_config_proto_rawDesc = []byte{
@@ -408,7 +416,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x4e, 0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a,
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@@ -459,18 +467,20 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
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 }
 
 var (

transport/internet/tls/config.proto

@@ -92,9 +92,9 @@ message Config {
   */
   repeated string verify_peer_cert_in_names = 17;
 
+  bytes ech_config = 18;
 
+  string ech_DOHserver = 19;
 
-  bytes ech_config = 20;
+  bytes ech_key_sets = 20;
-
-  string ech_DOHserver = 21;
 }

transport/internet/tls/ech.go

@@ -4,12 +4,14 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"fmt"
 	"io"
 	"net/http"
 	"strings"
 	"sync"
 	"time"
 
+	"github.com/OmarTariq612/goech"
 	"github.com/miekg/dns"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -23,6 +25,7 @@ func ApplyECH(c *Config, config *tls.Config) error {
 	nameToQuery := c.ServerName
 	var DOHServer string
 
+	if len(c.EchConfig) != 0 {
 		parts := strings.Split(c.Ech_DOHserver, "+")
 		if len(parts) == 2 {
 			// parse ECH DOH server in format of "example.com+https://1.1.1.1/dns-query"
@@ -48,6 +51,27 @@ func ApplyECH(c *Config, config *tls.Config) error {
 		}
 
 		config.EncryptedClientHelloConfigList = ECHConfig
+	}
+
+	if len(c.EchKeySets) != 0 {
+		var keys []tls.EncryptedClientHelloKey
+		KeySets, err := goech.UnmarshalECHKeySetList(c.EchKeySets)
+		if err != nil {
+			return errors.New("Failed to unmarshal ECHKeySetList: ", err)
+		}
+		for idx, keySet := range KeySets {
+			ECHConfig, err := keySet.ECHConfig.MarshalBinary()
+			ECHPrivateKey, err := keySet.PrivateKey.MarshalBinary()
+			if err != nil {
+				return errors.New("Failed to marshal ECHKey in index: ", idx, "with err: ", err)
+			}
+			keys = append(keys, tls.EncryptedClientHelloKey{
+				Config:     ECHConfig,
+				PrivateKey: ECHPrivateKey})
+		}
+		config.EncryptedClientHelloKeys = keys
+		fmt.Println(config.EncryptedClientHelloKeys)
+	}
 	return nil
 }