Add actions support to package auth verification (go-gitea#23729)

Partly fixes go-gitea#23642

Error info:

![image](https://user-images.githubusercontent.com/18380374/227827027-4280a368-ec9e-49e0-bb93-6b496ada7cd9.png)
ActionsUser (userID -2) is used to login in to docker in action jobs.

Due to we have no permission policy settings of ActionsUser now,
ActionsUser can only access public registry by this quick fix.

Author: yp05327

routers/api/packages/api.go

@@ -43,35 +43,38 @@ func reqPackageAccess(accessMode perm.AccessMode) func(ctx *context.Context) {
 	}
 }
 
-// CommonRoutes provide endpoints for most package managers (except containers - see below)
-// These are mounted on `/api/packages` (not `/api/v1/packages`)
-func CommonRoutes(ctx gocontext.Context) *web.Route {
-	r := web.NewRoute()
-
-	r.Use(context.PackageContexter(ctx))
-
-	authMethods := []auth.Method{
-		&auth.OAuth2{},
-		&auth.Basic{},
-		&nuget.Auth{},
-		&conan.Auth{},
-		&chef.Auth{},
-	}
+func verifyAuth(r *web.Route, authMethods []auth.Method) {
 	if setting.Service.EnableReverseProxyAuth {
 		authMethods = append(authMethods, &auth.ReverseProxy{})
 	}
-
 	authGroup := auth.NewGroup(authMethods...)
+
 	r.Use(func(ctx *context.Context) {
 		var err error
 		ctx.Doer, err = authGroup.Verify(ctx.Req, ctx.Resp, ctx, ctx.Session)
 		if err != nil {
-			log.Error("Verify: %v", err)
+			log.Error("Failed to verify user: %v", err)
 			ctx.Error(http.StatusUnauthorized, "authGroup.Verify")
 			return
 		}
 		ctx.IsSigned = ctx.Doer != nil
 	})
+}
+
+// CommonRoutes provide endpoints for most package managers (except containers - see below)
+// These are mounted on `/api/packages` (not `/api/v1/packages`)
+func CommonRoutes(ctx gocontext.Context) *web.Route {
+	r := web.NewRoute()
+
+	r.Use(context.PackageContexter(ctx))
+
+	verifyAuth(r, []auth.Method{
+		&auth.OAuth2{},
+		&auth.Basic{},
+		&nuget.Auth{},
+		&conan.Auth{},
+		&chef.Auth{},
+	})
 
 	r.Group("/{username}", func() {
 		r.Group("/cargo", func() {
@@ -401,24 +404,9 @@ func ContainerRoutes(ctx gocontext.Context) *web.Route {
 
 	r.Use(context.PackageContexter(ctx))
 
-	authMethods := []auth.Method{
+	verifyAuth(r, []auth.Method{
 		&auth.Basic{},
 		&container.Auth{},
-	}
-	if setting.Service.EnableReverseProxyAuth {
-		authMethods = append(authMethods, &auth.ReverseProxy{})
-	}
-
-	authGroup := auth.NewGroup(authMethods...)
-	r.Use(func(ctx *context.Context) {
-		var err error
-		ctx.Doer, err = authGroup.Verify(ctx.Req, ctx.Resp, ctx, ctx.Session)
-		if err != nil {
-			log.Error("Failed to verify user: %v", err)
-			ctx.Error(http.StatusUnauthorized, "Verify")
-			return
-		}
-		ctx.IsSigned = ctx.Doer != nil
 	})
 
 	r.Get("", container.ReqContainerAccess, container.DetermineSupport)

routers/api/packages/container/auth.go

@@ -30,13 +30,10 @@ func (a *Auth) Verify(req *http.Request, w http.ResponseWriter, store auth.DataS
 	if uid == 0 {
 		return nil, nil
 	}
-	if uid == -1 {
-		return user_model.NewGhostUser(), nil
-	}
 
-	u, err := user_model.GetUserByID(req.Context(), uid)
+	u, err := user_model.GetPossibleUserByID(req.Context(), uid)
 	if err != nil {
-		log.Error("GetUserByID:  %v", err)
+		log.Error("GetPossibleUserByID:  %v", err)
 		return nil, err
 	}