feat: restrict max avatar size

resolves #1171

pkg/config/config.go

@@ -62,6 +62,7 @@ const (
 	ServiceTestingtoken          Key = `service.testingtoken`
 	ServiceEnableEmailReminders  Key = `service.enableemailreminders`
 	ServiceEnableUserDeletion    Key = `service.enableuserdeletion`
+	ServiceMaxAvatarSize         Key = `service.maxavatarsize`
 
 	AuthLocalEnabled      Key = `auth.local.enabled`
 	AuthOpenIDEnabled     Key = `auth.openid.enabled`
@@ -287,6 +288,7 @@ func InitDefaultConfig() {
 	ServiceEnableTotp.setDefault(true)
 	ServiceEnableEmailReminders.setDefault(true)
 	ServiceEnableUserDeletion.setDefault(true)
+	ServiceMaxAvatarSize.setDefault(1024)
 
 	// Auth
 	AuthLocalEnabled.setDefault(true)

pkg/routes/api/v1/avatar.go

@@ -17,6 +17,7 @@
 package v1
 
 import (
+	"code.vikunja.io/api/pkg/config"
 	"code.vikunja.io/api/pkg/db"
 	"code.vikunja.io/api/pkg/files"
 	"code.vikunja.io/api/pkg/log"
@@ -49,7 +50,7 @@ import (
 // @tags user
 // @Produce octet-stream
 // @Param username path string true "The username of the user who's avatar you want to get"
-// @Param size query int false "The size of the avatar you want to get"
+// @Param size query int false "The size of the avatar you want to get. If bigger than the max configured size this will be adjusted to the maximum size."
 // @Success 200 {} blob "The avatar"
 // @Failure 404 {object} models.Message "The user does not exist."
 // @Failure 500 {object} models.Message "Internal error"
@@ -97,6 +98,9 @@ func GetAvatar(c echo.Context) error {
 			return handler.HandleHTTPError(err, c)
 		}
 	}
+	if sizeInt > config.ServiceMaxAvatarSize.GetInt64() {
+		sizeInt = config.ServiceMaxAvatarSize.GetInt64()
+	}
 
 	// Get the avatar
 	a, mimeType, err := avatarProvider.GetAvatar(u, sizeInt)

pkg/swagger/docs.go

@@ -7537,7 +7537,7 @@ const docTemplate = `{
                     },
                     {
                         "type": "integer",
-                        "description": "The size of the avatar you want to get",
+                        "description": "The size of the avatar you want to get. If bigger than the max configured size this will be adjusted to the maximum size.",
                         "name": "size",
                         "in": "query"
                     }

pkg/swagger/swagger.json

@@ -7528,7 +7528,7 @@
                     },
                     {
                         "type": "integer",
-                        "description": "The size of the avatar you want to get",
+                        "description": "The size of the avatar you want to get. If bigger than the max configured size this will be adjusted to the maximum size.",
                         "name": "size",
                         "in": "query"
                     }

pkg/swagger/swagger.yaml

@@ -1433,7 +1433,8 @@ paths:
         name: username
         required: true
         type: string
-      - description: The size of the avatar you want to get
+      - description: The size of the avatar you want to get. If bigger than the max
+          configured size this will be adjusted to the maximum size.
         in: query
         name: size
         type: integer