修复black2022的问题

service/xboard/service.go

@@ -3,6 +3,8 @@ package xboard
 import (
 	"bytes"
 	"context"
+	"crypto/sha256"
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -23,6 +25,19 @@ import (
 	"github.com/sagernet/sing/service"
 )
 
+func fixSSKey(key string, length int) string {
+	if key == "" {
+		return ""
+	}
+	// Try to decode as-is first
+	if data, err := base64.StdEncoding.DecodeString(key); err == nil && len(data) == length {
+		return key
+	}
+	// Use SHA256 to derive a fixed-length key from the password
+	hash := sha256.Sum256([]byte(key))
+	return base64.StdEncoding.EncodeToString(hash[:length])
+}
+
 func RegisterService(registry *boxService.Registry) {
 	boxService.Register[option.XBoardServiceOptions](registry, C.TypeXBoard, NewService)
 }
@@ -303,13 +318,26 @@ func (s *Service) setupNode() error {
 		}
 		inboundOptions = &vmessOptions
 	case "shadowsocks":
+		method := inner.Cipher
+		serverKey := inner.ServerKey
+		if method == "" {
+			method = "aes-256-gcm"
+		}
+		// Hardening for Shadowsocks 2022
+		if len(method) >= 4 && method[:4] == "2022" {
+			keyLen := 32
+			if len(method) >= 18 && method[13:16] == "128" {
+				keyLen = 16
+			}
+			serverKey = fixSSKey(serverKey, keyLen)
+		}
 		ssOptions := option.ShadowsocksInboundOptions{
 			ListenOptions: option.ListenOptions{
 				Listen:     listenAddr,
 				ListenPort: uint16(inner.Port),
 			},
-			Method:   inner.Cipher,
-			Password: inner.ServerKey,
+			Method:   method,
+			Password: serverKey,
 		}
 		inboundOptions = &ssOptions
 	case "trojan":