chore: ss2022 converter method verify

common/convert/converter.go

@@ -268,16 +268,22 @@ func ConvertsV2Ray(buf []byte) ([]map[string]any, error) {
 			}
 
 			var (
-				cipher   = urlSS.User.Username()
-				password string
+				cipherRaw = urlSS.User.Username()
+				cipher    string
+				password  string
 			)
 
 			if password, found = urlSS.User.Password(); !found {
-				dcBuf, _ := encRaw.DecodeString(cipher)
+				dcBuf, _ := enc.DecodeString(cipherRaw)
 				cipher, password, found = strings.Cut(string(dcBuf), ":")
 				if !found {
 					continue
 				}
+				err := VerifyMethod(cipher, password)
+				if err != nil {
+					dcBuf, _ := encRaw.DecodeString(cipherRaw)
+					cipher, password, found = strings.Cut(string(dcBuf), ":")
+				}
 			}
 
 			ss := make(map[string]any, 10)

common/convert/util.go

@@ -2,6 +2,7 @@ package convert
 
 import (
 	"encoding/base64"
+	"github.com/metacubex/sing-shadowsocks/shadowimpl"
 	"math/rand"
 	"net/http"
 	"strings"
@@ -314,3 +315,8 @@ func SetUserAgent(header http.Header) {
 	userAgent := RandUserAgent()
 	header.Set("User-Agent", userAgent)
 }
+
+func VerifyMethod(cipher, password string) (err error) {
+	_, err = shadowimpl.FetchMethod(cipher, password)
+	return
+}