chore: Generate UUID from fastrand

common/convert/util.go

@@ -2,13 +2,14 @@ package convert
 
 import (
 	"encoding/base64"
-	"github.com/metacubex/sing-shadowsocks/shadowimpl"
 	"math/rand"
 	"net/http"
 	"strings"
 	"time"
 
-	"github.com/gofrs/uuid"
+	"github.com/Dreamacro/clash/common/utils"
+
+	"github.com/metacubex/sing-shadowsocks/shadowimpl"
 )
 
 var hostsSuffix = []string{
@@ -293,7 +294,7 @@ var (
 )
 
 func RandHost() string {
-	id, _ := uuid.NewV4()
+	id, _ := utils.UnsafeUUIDGenerator.NewV4()
 	base := strings.ToLower(base64.RawURLEncoding.EncodeToString(id.Bytes()))
 	base = strings.ReplaceAll(base, "-", "")
 	base = strings.ReplaceAll(base, "_", "")

common/utils/uuid.go

@@ -2,15 +2,22 @@ package utils
 
 import (
 	"github.com/gofrs/uuid"
+	"github.com/zhangyunhao116/fastrand"
 )
 
-var uuidNamespace, _ = uuid.FromString("00000000-0000-0000-0000-000000000000")
+type fastRandReader struct{}
+
+func (r fastRandReader) Read(p []byte) (int, error) {
+	return fastrand.Read(p)
+}
+
+var UnsafeUUIDGenerator = uuid.NewGenWithOptions(uuid.WithRandomReader(fastRandReader{}))
 
 // UUIDMap https://github.com/XTLS/Xray-core/issues/158#issue-783294090
 func UUIDMap(str string) (uuid.UUID, error) {
 	u, err := uuid.FromString(str)
 	if err != nil {
-		return uuid.NewV5(uuidNamespace, str), nil
+		return UnsafeUUIDGenerator.NewV5(uuid.Nil, str), nil
 	}
 	return u, nil
 }