Added Seed to mKCP, encrypts the packets

infra/conf/transport_internet.go

@@ -43,6 +43,7 @@ type KCPConfig struct {
 	ReadBufferSize  *uint32         `json:"readBufferSize"`
 	WriteBufferSize *uint32         `json:"writeBufferSize"`
 	HeaderConfig    json.RawMessage `json:"header"`
+	Seed            *string         `json:"seed"`
 }
 
 // Build implements Buildable.
@@ -100,6 +101,10 @@ func (c *KCPConfig) Build() (proto.Message, error) {
 		config.HeaderConfig = serial.ToTypedMessage(ts)
 	}
 
+	if c.Seed != nil {
+		config.Seed = &kcp.EncryptionSeed{Seed: *c.Seed}
+	}
+
 	return config, nil
 }
 

transport/internet/kcp/config.go

@@ -4,6 +4,7 @@ package kcp
 
 import (
 	"crypto/cipher"
+	"fmt"
 
 	"v2ray.com/core/common"
 	"v2ray.com/core/transport/internet"
@@ -60,7 +61,11 @@ func (c *Config) GetReadBufferSize() uint32 {
 }
 
 // GetSecurity returns the security settings.
-func (*Config) GetSecurity() (cipher.AEAD, error) {
+func (c *Config) GetSecurity() (cipher.AEAD, error) {
+	if c.Seed != nil {
+		fmt.Println("NewAEADAESGCMBasedOnSeed Used")
+		return NewAEADAESGCMBasedOnSeed(c.Seed.Seed), nil
+	}
 	return NewSimpleAuthenticator(), nil
 }
 

transport/internet/kcp/config.pb.go

@@ -355,6 +355,54 @@ func (x *ConnectionReuse) GetEnable() bool {
 	return false
 }
 
+// Maximum Transmission Unit, in bytes.
+type EncryptionSeed struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Seed string `protobuf:"bytes,1,opt,name=seed,proto3" json:"seed,omitempty"`
+}
+
+func (x *EncryptionSeed) Reset() {
+	*x = EncryptionSeed{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EncryptionSeed) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EncryptionSeed) ProtoMessage() {}
+
+func (x *EncryptionSeed) ProtoReflect() protoreflect.Message {
+	mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[7]
+	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 EncryptionSeed.ProtoReflect.Descriptor instead.
+func (*EncryptionSeed) Descriptor() ([]byte, []int) {
+	return file_v2ray_com_core_transport_internet_kcp_config_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *EncryptionSeed) GetSeed() string {
+	if x != nil {
+		return x.Seed
+	}
+	return ""
+}
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -368,12 +416,13 @@ type Config struct {
 	WriteBuffer      *WriteBuffer         `protobuf:"bytes,6,opt,name=write_buffer,json=writeBuffer,proto3" json:"write_buffer,omitempty"`
 	ReadBuffer       *ReadBuffer          `protobuf:"bytes,7,opt,name=read_buffer,json=readBuffer,proto3" json:"read_buffer,omitempty"`
 	HeaderConfig     *serial.TypedMessage `protobuf:"bytes,8,opt,name=header_config,json=headerConfig,proto3" json:"header_config,omitempty"`
+	Seed             *EncryptionSeed      `protobuf:"bytes,10,opt,name=seed,proto3" json:"seed,omitempty"`
 }
 
 func (x *Config) Reset() {
 	*x = Config{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[7]
+		mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -386,7 +435,7 @@ func (x *Config) String() string {
 func (*Config) ProtoMessage() {}
 
 func (x *Config) ProtoReflect() protoreflect.Message {
-	mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[7]
+	mi := &file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -399,7 +448,7 @@ func (x *Config) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Config.ProtoReflect.Descriptor instead.
 func (*Config) Descriptor() ([]byte, []int) {
-	return file_v2ray_com_core_transport_internet_kcp_config_proto_rawDescGZIP(), []int{7}
+	return file_v2ray_com_core_transport_internet_kcp_config_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *Config) GetMtu() *MTU {
@@ -458,6 +507,13 @@ func (x *Config) GetHeaderConfig() *serial.TypedMessage {
 	return nil
 }
 
+func (x *Config) GetSeed() *EncryptionSeed {
+	if x != nil {
+		return x.Seed
+	}
+	return nil
+}
+
 var File_v2ray_com_core_transport_internet_kcp_config_proto protoreflect.FileDescriptor
 
 var file_v2ray_com_core_transport_internet_kcp_config_proto_rawDesc = []byte{
@@ -485,50 +541,57 @@ var file_v2ray_com_core_transport_internet_kcp_config_proto_rawDesc = []byte{
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-	0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x6b, 0x63,
-	0x70, 0x50, 0x01, 0x5a, 0x03, 0x6b, 0x63, 0x70, 0xaa, 0x02, 0x21, 0x56, 0x32, 0x52, 0x61, 0x79,
-	0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e,
-	0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x4b, 0x63, 0x70, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x6b, 0x63, 0x70, 0x50, 0x01,
+	0x5a, 0x03, 0x6b, 0x63, 0x70, 0xaa, 0x02, 0x21, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e, 0x43, 0x6f,
+	0x72, 0x65, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74,
+	0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x4b, 0x63, 0x70, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (
@@ -543,7 +606,7 @@ func file_v2ray_com_core_transport_internet_kcp_config_proto_rawDescGZIP() []byt
 	return file_v2ray_com_core_transport_internet_kcp_config_proto_rawDescData
 }
 
-var file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
+var file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
 var file_v2ray_com_core_transport_internet_kcp_config_proto_goTypes = []interface{}{
 	(*MTU)(nil),                 // 0: v2ray.core.transport.internet.kcp.MTU
 	(*TTI)(nil),                 // 1: v2ray.core.transport.internet.kcp.TTI
@@ -552,8 +615,9 @@ var file_v2ray_com_core_transport_internet_kcp_config_proto_goTypes = []interfac
 	(*WriteBuffer)(nil),         // 4: v2ray.core.transport.internet.kcp.WriteBuffer
 	(*ReadBuffer)(nil),          // 5: v2ray.core.transport.internet.kcp.ReadBuffer
 	(*ConnectionReuse)(nil),     // 6: v2ray.core.transport.internet.kcp.ConnectionReuse
-	(*Config)(nil),              // 7: v2ray.core.transport.internet.kcp.Config
-	(*serial.TypedMessage)(nil), // 8: v2ray.core.common.serial.TypedMessage
+	(*EncryptionSeed)(nil),      // 7: v2ray.core.transport.internet.kcp.EncryptionSeed
+	(*Config)(nil),              // 8: v2ray.core.transport.internet.kcp.Config
+	(*serial.TypedMessage)(nil), // 9: v2ray.core.common.serial.TypedMessage
 }
 var file_v2ray_com_core_transport_internet_kcp_config_proto_depIdxs = []int32{
 	0, // 0: v2ray.core.transport.internet.kcp.Config.mtu:type_name -> v2ray.core.transport.internet.kcp.MTU
@@ -562,12 +626,13 @@ var file_v2ray_com_core_transport_internet_kcp_config_proto_depIdxs = []int32{
 	3, // 3: v2ray.core.transport.internet.kcp.Config.downlink_capacity:type_name -> v2ray.core.transport.internet.kcp.DownlinkCapacity
 	4, // 4: v2ray.core.transport.internet.kcp.Config.write_buffer:type_name -> v2ray.core.transport.internet.kcp.WriteBuffer
 	5, // 5: v2ray.core.transport.internet.kcp.Config.read_buffer:type_name -> v2ray.core.transport.internet.kcp.ReadBuffer
-	8, // 6: v2ray.core.transport.internet.kcp.Config.header_config:type_name -> v2ray.core.common.serial.TypedMessage
-	7, // [7:7] is the sub-list for method output_type
-	7, // [7:7] is the sub-list for method input_type
-	7, // [7:7] is the sub-list for extension type_name
-	7, // [7:7] is the sub-list for extension extendee
-	0, // [0:7] is the sub-list for field type_name
+	9, // 6: v2ray.core.transport.internet.kcp.Config.header_config:type_name -> v2ray.core.common.serial.TypedMessage
+	7, // 7: v2ray.core.transport.internet.kcp.Config.seed:type_name -> v2ray.core.transport.internet.kcp.EncryptionSeed
+	8, // [8:8] is the sub-list for method output_type
+	8, // [8:8] is the sub-list for method input_type
+	8, // [8:8] is the sub-list for extension type_name
+	8, // [8:8] is the sub-list for extension extendee
+	0, // [0:8] is the sub-list for field type_name
 }
 
 func init() { file_v2ray_com_core_transport_internet_kcp_config_proto_init() }
@@ -661,6 +726,18 @@ func file_v2ray_com_core_transport_internet_kcp_config_proto_init() {
 			}
 		}
 		file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EncryptionSeed); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_v2ray_com_core_transport_internet_kcp_config_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Config); i {
 			case 0:
 				return &v.state
@@ -679,7 +756,7 @@ func file_v2ray_com_core_transport_internet_kcp_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_v2ray_com_core_transport_internet_kcp_config_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   8,
+			NumMessages:   9,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

transport/internet/kcp/config.proto

@@ -42,6 +42,11 @@ message ConnectionReuse {
   bool enable = 1;
 }
 
+// Maximum Transmission Unit, in bytes.
+message EncryptionSeed {
+  string seed = 1;
+}
+
 message Config {
   MTU mtu = 1;
   TTI tti = 2;
@@ -52,4 +57,5 @@ message Config {
   ReadBuffer read_buffer = 7;
   v2ray.core.common.serial.TypedMessage header_config = 8;
   reserved 9;
+  EncryptionSeed seed = 10;
 }

transport/internet/kcp/cryptreal.go

@@ -0,0 +1,14 @@
+package kcp
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/sha256"
+	"v2ray.com/core/common"
+)
+
+func NewAEADAESGCMBasedOnSeed(seed string) cipher.AEAD {
+	HashedSeed := sha256.Sum256([]byte(seed))
+	aesBlock := common.Must2(aes.NewCipher(HashedSeed[:16])).(cipher.Block)
+	return common.Must2(cipher.NewGCM(aesBlock)).(cipher.AEAD)
+}