Add shadowsocks 2022 multi-user inbound

go.sum

@@ -174,8 +174,6 @@ github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
-github.com/sagernet/sing v0.0.0-20220522025344-b21aa294fca3 h1:z6cVzCta0vPVKo4lsiHMEDmw3cSFC5TGojXobbTS1DA=
-github.com/sagernet/sing v0.0.0-20220522025344-b21aa294fca3/go.mod h1:7aFl1bLxdWLIhptc1DwhMWpRfT62rJYzKPYuYlzYs5w=
 github.com/sagernet/sing v0.0.0-20220523024450-2216901ec429 h1:31vx64WHtycaqw0bGLl6ImJvmHsXqHoPzkuwKmTqbx8=
 github.com/sagernet/sing v0.0.0-20220523024450-2216901ec429/go.mod h1:7aFl1bLxdWLIhptc1DwhMWpRfT62rJYzKPYuYlzYs5w=
 github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb h1:XfLJSPIOUX+osiMraVgIrMR27uMXnRJWGm1+GL8/63U=

infra/conf/shadowsocks.go

@@ -48,13 +48,36 @@ type ShadowsocksServerConfig struct {
 
 func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
 	if C.Contains(shadowaead_2022.List, v.Cipher) {
+		if len(v.Users) > 0 {
+			if v.Cipher == "" {
+				return nil, newError("shadowsocks 2022 (multi-user): missing server method")
+			}
+			if !strings.Contains(v.Cipher, "aes") {
+				return nil, newError("shadowsocks 2022 (multi-user): only blake3-aes-*-gcm methods are supported")
+			}
+
+			config := new(shadowsocks_2022.MultiUserServerConfig)
+			config.Method = v.Cipher
+
+			config.Key = v.Password
+			config.Network = v.NetworkList.Build()
+
+			for _, user := range v.Users {
+				if user.Cipher != "" {
+					return nil, newError("shadowsocks 2022 (multi-user): users must have empty method")
+				}
+				config.Users = append(config.Users, &shadowsocks_2022.User{
+					Key:   user.Password,
+					Email: user.Email,
+				})
+			}
+			return config, nil
+		}
+
 		config := new(shadowsocks_2022.ServerConfig)
 		config.Method = v.Cipher
 		config.Key = v.Password
 		config.Network = v.NetworkList.Build()
-		if len(v.Users) != 0 {
-			return nil, newError("shadowsocks 2022 ciphers accept no users.")
-		}
 		return config, nil
 	}
 

proxy/shadowsocks_2022/config.pb.go

@@ -28,7 +28,8 @@ type ServerConfig struct {
 
 	Method  string        `protobuf:"bytes,1,opt,name=method,proto3" json:"method,omitempty"`
 	Key     string        `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
-	Network []net.Network `protobuf:"varint,3,rep,packed,name=network,proto3,enum=xray.common.net.Network" json:"network,omitempty"`
+	Email   string        `protobuf:"bytes,3,opt,name=email,proto3" json:"email,omitempty"`
+	Network []net.Network `protobuf:"varint,4,rep,packed,name=network,proto3,enum=xray.common.net.Network" json:"network,omitempty"`
 }
 
 func (x *ServerConfig) Reset() {
@@ -77,6 +78,13 @@ func (x *ServerConfig) GetKey() string {
 	return ""
 }
 
+func (x *ServerConfig) GetEmail() string {
+	if x != nil {
+		return x.Email
+	}
+	return ""
+}
+
 func (x *ServerConfig) GetNetwork() []net.Network {
 	if x != nil {
 		return x.Network
@@ -84,6 +92,132 @@ func (x *ServerConfig) GetNetwork() []net.Network {
 	return nil
 }
 
+type MultiUserServerConfig struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Method  string        `protobuf:"bytes,1,opt,name=method,proto3" json:"method,omitempty"`
+	Key     string        `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
+	Users   []*User       `protobuf:"bytes,3,rep,name=users,proto3" json:"users,omitempty"`
+	Network []net.Network `protobuf:"varint,4,rep,packed,name=network,proto3,enum=xray.common.net.Network" json:"network,omitempty"`
+}
+
+func (x *MultiUserServerConfig) Reset() {
+	*x = MultiUserServerConfig{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MultiUserServerConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MultiUserServerConfig) ProtoMessage() {}
+
+func (x *MultiUserServerConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MultiUserServerConfig.ProtoReflect.Descriptor instead.
+func (*MultiUserServerConfig) Descriptor() ([]byte, []int) {
+	return file_proxy_shadowsocks_2022_config_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *MultiUserServerConfig) GetMethod() string {
+	if x != nil {
+		return x.Method
+	}
+	return ""
+}
+
+func (x *MultiUserServerConfig) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+func (x *MultiUserServerConfig) GetUsers() []*User {
+	if x != nil {
+		return x.Users
+	}
+	return nil
+}
+
+func (x *MultiUserServerConfig) GetNetwork() []net.Network {
+	if x != nil {
+		return x.Network
+	}
+	return nil
+}
+
+type User struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key   string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Email string `protobuf:"bytes,2,opt,name=email,proto3" json:"email,omitempty"`
+}
+
+func (x *User) Reset() {
+	*x = User{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *User) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*User) ProtoMessage() {}
+
+func (x *User) ProtoReflect() protoreflect.Message {
+	mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use User.ProtoReflect.Descriptor instead.
+func (*User) Descriptor() ([]byte, []int) {
+	return file_proxy_shadowsocks_2022_config_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *User) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+func (x *User) GetEmail() string {
+	if x != nil {
+		return x.Email
+	}
+	return ""
+}
+
 type ClientConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -99,7 +233,7 @@ type ClientConfig struct {
 func (x *ClientConfig) Reset() {
 	*x = ClientConfig{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[1]
+		mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -112,7 +246,7 @@ func (x *ClientConfig) String() string {
 func (*ClientConfig) ProtoMessage() {}
 
 func (x *ClientConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[1]
+	mi := &file_proxy_shadowsocks_2022_config_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -125,7 +259,7 @@ func (x *ClientConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ClientConfig.ProtoReflect.Descriptor instead.
 func (*ClientConfig) Descriptor() ([]byte, []int) {
-	return file_proxy_shadowsocks_2022_config_proto_rawDescGZIP(), []int{1}
+	return file_proxy_shadowsocks_2022_config_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *ClientConfig) GetAddress() *net.IPOrDomain {
@@ -173,33 +307,49 @@ var file_proxy_shadowsocks_2022_config_proto_rawDesc = []byte{
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+	0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x73, 0x68, 0x61, 0x64,
+	0x6f, 0x77, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0x5f, 0x32, 0x30, 0x32, 0x32, 0x50, 0x01, 0x5a, 0x30,
+	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f,
+	0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f,
+	0x73, 0x68, 0x61, 0x64, 0x6f, 0x77, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0x5f, 0x32, 0x30, 0x32, 0x32,
+	0xaa, 0x02, 0x1a, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x53, 0x68,
+	0x61, 0x64, 0x6f, 0x77, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0x32, 0x30, 0x32, 0x32, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -214,21 +364,25 @@ func file_proxy_shadowsocks_2022_config_proto_rawDescGZIP() []byte {
 	return file_proxy_shadowsocks_2022_config_proto_rawDescData
 }
 
-var file_proxy_shadowsocks_2022_config_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_proxy_shadowsocks_2022_config_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
 var file_proxy_shadowsocks_2022_config_proto_goTypes = []interface{}{
-	(*ServerConfig)(nil),   // 0: xray.proxy.shadowsocks_2022.ServerConfig
-	(*ClientConfig)(nil),   // 1: xray.proxy.shadowsocks_2022.ClientConfig
-	(net.Network)(0),       // 2: xray.common.net.Network
-	(*net.IPOrDomain)(nil), // 3: xray.common.net.IPOrDomain
+	(*ServerConfig)(nil),          // 0: xray.proxy.shadowsocks_2022.ServerConfig
+	(*MultiUserServerConfig)(nil), // 1: xray.proxy.shadowsocks_2022.MultiUserServerConfig
+	(*User)(nil),                  // 2: xray.proxy.shadowsocks_2022.User
+	(*ClientConfig)(nil),          // 3: xray.proxy.shadowsocks_2022.ClientConfig
+	(net.Network)(0),              // 4: xray.common.net.Network
+	(*net.IPOrDomain)(nil),        // 5: xray.common.net.IPOrDomain
 }
 var file_proxy_shadowsocks_2022_config_proto_depIdxs = []int32{
-	2, // 0: xray.proxy.shadowsocks_2022.ServerConfig.network:type_name -> xray.common.net.Network
-	3, // 1: xray.proxy.shadowsocks_2022.ClientConfig.address:type_name -> xray.common.net.IPOrDomain
-	2, // [2:2] is the sub-list for method output_type
-	2, // [2:2] is the sub-list for method input_type
-	2, // [2:2] is the sub-list for extension type_name
-	2, // [2:2] is the sub-list for extension extendee
-	0, // [0:2] is the sub-list for field type_name
+	4, // 0: xray.proxy.shadowsocks_2022.ServerConfig.network:type_name -> xray.common.net.Network
+	2, // 1: xray.proxy.shadowsocks_2022.MultiUserServerConfig.users:type_name -> xray.proxy.shadowsocks_2022.User
+	4, // 2: xray.proxy.shadowsocks_2022.MultiUserServerConfig.network:type_name -> xray.common.net.Network
+	5, // 3: xray.proxy.shadowsocks_2022.ClientConfig.address:type_name -> xray.common.net.IPOrDomain
+	4, // [4:4] is the sub-list for method output_type
+	4, // [4:4] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
 }
 
 func init() { file_proxy_shadowsocks_2022_config_proto_init() }
@@ -250,6 +404,30 @@ func file_proxy_shadowsocks_2022_config_proto_init() {
 			}
 		}
 		file_proxy_shadowsocks_2022_config_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MultiUserServerConfig); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proxy_shadowsocks_2022_config_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*User); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proxy_shadowsocks_2022_config_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ClientConfig); i {
 			case 0:
 				return &v.state
@@ -268,7 +446,7 @@ func file_proxy_shadowsocks_2022_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proxy_shadowsocks_2022_config_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   4,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proxy/shadowsocks_2022/config.proto

@@ -12,7 +12,20 @@ import "common/net/address.proto";
 message ServerConfig {
   string method = 1;
   string key = 2;
-  repeated xray.common.net.Network network = 3;
+  string email = 3;
+  repeated xray.common.net.Network network = 4;
+}
+
+message MultiUserServerConfig {
+  string method = 1;
+  string key = 2;
+  repeated User users = 3;
+  repeated xray.common.net.Network network = 4;
+}
+
+message User {
+  string key = 1;
+  string email = 2;
 }
 
 message ClientConfig {

proxy/shadowsocks_2022/inbound.go

@@ -30,6 +30,7 @@ func init() {
 type Inbound struct {
 	networks []net.Network
 	service  shadowsocks.Service
+	email    string
 }
 
 func NewServer(ctx context.Context, config *ServerConfig) (*Inbound, error) {
@@ -42,6 +43,7 @@ func NewServer(ctx context.Context, config *ServerConfig) (*Inbound, error) {
 	}
 	inbound := &Inbound{
 		networks: networks,
+		email:    config.Email,
 	}
 	if !C.Contains(shadowaead_2022.List, config.Method) {
 		return nil, newError("unsupported method ", config.Method)
@@ -103,6 +105,7 @@ func (i *Inbound) NewConnection(ctx context.Context, conn net.Conn, metadata M.M
 		From:   metadata.Source,
 		To:     metadata.Destination,
 		Status: log.AccessAccepted,
+		Email:  i.email,
 	})
 	newError("tunnelling request to tcp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
 	dispatcher := session.DispatcherFromContext(ctx)
@@ -123,6 +126,7 @@ func (i *Inbound) NewPacketConnection(ctx context.Context, conn N.PacketConn, me
 		From:   metadata.Source,
 		To:     metadata.Destination,
 		Status: log.AccessAccepted,
+		Email:  i.email,
 	})
 	newError("tunnelling request to udp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
 	dispatcher := session.DispatcherFromContext(ctx)

proxy/shadowsocks_2022/inbound_multi.go

@@ -0,0 +1,161 @@
+package shadowsocks_2022
+
+import (
+	"context"
+	"encoding/base64"
+
+	B "github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/random"
+	"github.com/sagernet/sing/protocol/shadowsocks"
+	"github.com/sagernet/sing/protocol/shadowsocks/shadowaead_2022"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/log"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/uuid"
+	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport/internet/stat"
+)
+
+func init() {
+	common.Must(common.RegisterConfig((*MultiUserServerConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		return NewMultiServer(ctx, config.(*MultiUserServerConfig))
+	}))
+}
+
+type MultiUserInbound struct {
+	networks []net.Network
+	service  *shadowaead_2022.MultiService[string]
+}
+
+func NewMultiServer(ctx context.Context, config *MultiUserServerConfig) (*MultiUserInbound, error) {
+	networks := config.Network
+	if len(networks) == 0 {
+		networks = []net.Network{
+			net.Network_TCP,
+			net.Network_UDP,
+		}
+	}
+	inbound := &MultiUserInbound{
+		networks: networks,
+	}
+	if config.Key == "" {
+		return nil, newError("missing key")
+	}
+	psk, err := base64.StdEncoding.DecodeString(config.Key)
+	if err != nil {
+		return nil, newError("parse config").Base(err)
+	}
+	service, err := shadowaead_2022.NewMultiService[string](config.Method, psk, random.Default, 500, inbound)
+	if err != nil {
+		return nil, newError("create service").Base(err)
+	}
+
+	for _, user := range config.Users {
+		if user.Email == "" {
+			u := uuid.New()
+			user.Email = "(user with empty email - " + u.String() + ")"
+		}
+		uPsk, err := base64.StdEncoding.DecodeString(user.Key)
+		if err != nil {
+			return nil, newError("parse user key for ", user.Email).Base(err)
+		}
+		err = service.AddUser(user.Email, uPsk)
+		if err != nil {
+			return nil, newError("add user").Base(err)
+		}
+	}
+
+	inbound.service = service
+	return inbound, nil
+}
+
+func (i *MultiUserInbound) Network() []net.Network {
+	return i.networks
+}
+
+func (i *MultiUserInbound) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
+	inbound := session.InboundFromContext(ctx)
+	if inbound == nil {
+		panic("no inbound metadata")
+	}
+
+	var metadata M.Metadata
+	if inbound.Source.IsValid() {
+		metadata.Source = M.ParseSocksaddr(inbound.Source.NetAddr())
+	}
+
+	ctx = session.ContextWithDispatcher(ctx, dispatcher)
+
+	if network == net.Network_TCP {
+		return i.service.NewConnection(ctx, connection, metadata)
+	} else {
+		reader := buf.NewReader(connection)
+		pc := &natPacketConn{connection}
+		for {
+			mb, err := reader.ReadMultiBuffer()
+			if err != nil {
+				return err
+			}
+			for _, buffer := range mb {
+				err = i.service.NewPacket(ctx, pc, B.As(buffer.Bytes()), metadata)
+				if err != nil {
+					return err
+				}
+			}
+		}
+	}
+}
+
+func (i *MultiUserInbound) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
+	userCtx := ctx.(*shadowsocks.UserContext[string])
+	ctx = log.ContextWithAccessMessage(userCtx.Context, &log.AccessMessage{
+		From:   metadata.Source,
+		To:     metadata.Destination,
+		Status: log.AccessAccepted,
+		Email:  userCtx.User,
+	})
+	newError("tunnelling request to tcp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
+	dispatcher := session.DispatcherFromContext(ctx)
+	link, err := dispatcher.Dispatch(ctx, toDestination(metadata.Destination, net.Network_TCP))
+	if err != nil {
+		return err
+	}
+	outConn := &pipeConnWrapper{
+		&buf.BufferedReader{Reader: link.Reader},
+		link.Writer,
+		conn,
+	}
+	return bufio.CopyConn(ctx, conn, outConn)
+}
+
+func (i *MultiUserInbound) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
+	userCtx := ctx.(*shadowsocks.UserContext[string])
+	ctx = log.ContextWithAccessMessage(userCtx.Context, &log.AccessMessage{
+		From:   metadata.Source,
+		To:     metadata.Destination,
+		Status: log.AccessAccepted,
+		Email:  userCtx.User,
+	})
+	newError("tunnelling request to udp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
+	dispatcher := session.DispatcherFromContext(ctx)
+	destination := toDestination(metadata.Destination, net.Network_UDP)
+	link, err := dispatcher.Dispatch(ctx, destination)
+	if err != nil {
+		return err
+	}
+	outConn := &packetConnWrapper{
+		Reader: link.Reader,
+		Writer: link.Writer,
+		Dest:   destination,
+	}
+	return bufio.CopyPacketConn(ctx, conn, outConn)
+}
+
+func (i *MultiUserInbound) HandleError(err error) {
+	newError(err).AtWarning().WriteToLog()
+}