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service/xboard/service.go

@@ -27,20 +27,16 @@ import (
 	"github.com/sagernet/sing/service"
 )
 
-// ss2022Key derives a key for SS2022 exactly like Xboard/V2bX:
+// ss2022Key returns the correctly sized identity string.
-// It takes the identity string (like a Hex hash or UUID), ensures it's the correct length,
-// and returns its Base64 representation.
 func ss2022Key(identity string, keyLen int) string {
-	raw := []byte(identity)
+	if len(identity) > keyLen {
-	if len(raw) > keyLen {
+		return identity[:keyLen]
-		raw = raw[:keyLen]
+	} else if len(identity) < keyLen {
-	} else if len(raw) < keyLen {
-		// Pad with zeros if shorter (though Xboard usually provides 32 chars)
 		padded := make([]byte, keyLen)
-		copy(padded, raw)
+		copy(padded, []byte(identity))
-		raw = padded
+		return string(padded)
 	}
-	return base64.StdEncoding.EncodeToString(raw)
+	return identity
 }
 
 // ss2022KeyLength returns the required key length for a given SS2022 cipher.