feat: sign of file

internal/bootstrap/data/setting.go

@@ -88,6 +88,7 @@ func initialSettings() {
 		{Key: "global_readme", Value: "This is global readme", Type: conf.TypeText, Group: model.GLOBAL},
 		{Key: "customize_head", Type: conf.TypeText, Group: model.GLOBAL, Flag: model.PRIVATE},
 		{Key: "customize_body", Type: conf.TypeText, Group: model.GLOBAL, Flag: model.PRIVATE},
+		{Key: "link_expiration", Value: "4", Type: conf.TypeNumber, Group: model.GLOBAL, Flag: model.PRIVATE},
 		// single settings
 		{Key: "token", Value: token, Type: conf.TypeString, Group: model.SINGLE, Flag: model.PRIVATE},
 	}

internal/sign/sign.go

@@ -0,0 +1,30 @@
+package sign
+
+import (
+	"github.com/alist-org/alist/v3/internal/setting"
+	"github.com/alist-org/alist/v3/pkg/sign"
+	"sync"
+	"time"
+)
+
+var once sync.Once
+var instance sign.Sign
+
+func WithDuration(data string, d time.Duration) string {
+	once.Do(Instance)
+	return instance.Sign(data, time.Now().Add(d).Unix())
+}
+
+func NotExpired(data string) string {
+	once.Do(Instance)
+	return instance.Sign(data, 0)
+}
+
+func Verify(data string, sign string) error {
+	once.Do(Instance)
+	return instance.Verify(data, sign)
+}
+
+func Instance() {
+	instance = sign.NewHMACSign([]byte(setting.GetByKey("token")))
+}