[#216] Add bucket owner check

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

api/handler/copy.go

@@ -71,6 +71,15 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err = h.checkBucketOwner(r, srcBucket, r.Header.Get(api.AmzSourceExpectedBucketOwner)); err != nil {
+		h.logAndSendError(w, "source expected owner doesn't match", reqInfo, err)
+		return
+	}
+	if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	if inf, err = h.obj.GetObjectInfo(r.Context(), srcBucket, srcObject); err != nil {
 		h.logAndSendError(w, "could not find object", reqInfo, err)
 		return

api/handler/delete.go

@@ -44,6 +44,11 @@ type DeleteObjectsResponse struct {
 func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 	reqInfo := api.GetReqInfo(r.Context())
 
+	if err := h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	if err := h.obj.DeleteObject(r.Context(), reqInfo.BucketName, reqInfo.ObjectName); err != nil {
 		h.log.Error("could not delete object",
 			zap.String("request_id", reqInfo.RequestID),
@@ -100,6 +105,11 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 		DeletedObjects: make([]ObjectIdentifier, 0, len(toRemove)),
 	}
 
+	if err := h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	if errs := h.obj.DeleteObjects(r.Context(), reqInfo.BucketName, toRemove); errs != nil && !requested.Quiet {
 		additional := []zap.Field{
 			zap.Strings("objects_name", toRemove),
@@ -135,6 +145,10 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 
 func (h *handler) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
 	reqInfo := api.GetReqInfo(r.Context())
+	if err := h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
 	if err := h.obj.DeleteBucket(r.Context(), &layer.DeleteBucketParams{Name: reqInfo.BucketName}); err != nil {
 		h.logAndSendError(w, "couldn't delete bucket", reqInfo, err)
 	}

api/handler/get.go

@@ -93,6 +93,11 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	if inf, err = h.obj.GetObjectInfo(r.Context(), reqInfo.BucketName, reqInfo.ObjectName); err != nil {
 		h.logAndSendError(w, "could not find object", reqInfo, err)
 		return

api/handler/head.go

@@ -31,6 +31,11 @@ func (h *handler) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
 		reqInfo = api.GetReqInfo(r.Context())
 	)
 
+	if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	if inf, err = h.obj.GetObjectInfo(r.Context(), reqInfo.BucketName, reqInfo.ObjectName); err != nil {
 		h.logAndSendError(w, "could not fetch object info", reqInfo, err)
 		return
@@ -56,7 +61,11 @@ func (h *handler) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
 
 	bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
 	if err != nil {
-		h.logAndSendError(w, "could not fetch object info", reqInfo, err)
+		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
+		return
+	}
+	if err = checkOwner(bktInfo, r.Header.Get(api.AmzExpectedBucketOwner)); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
 		return
 	}
 

api/handler/object_list.go

@@ -21,6 +21,11 @@ func (h *handler) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	list, err := h.obj.ListObjectsV1(r.Context(), params)
 	if err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
@@ -60,6 +65,11 @@ func (h *handler) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil {
+		h.logAndSendError(w, "expected owner doesn't match", reqInfo, err)
+		return
+	}
+
 	list, err := h.obj.ListObjectsV2(r.Context(), params)
 	if err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)

api/handler/util.go

@@ -18,3 +18,23 @@ func (h *handler) logAndSendError(w http.ResponseWriter, logText string, reqInfo
 	h.log.Error(logText, fields...)
 	api.WriteErrorResponse(w, reqInfo, err)
 }
+
+func (h *handler) checkBucketOwner(r *http.Request, bucket string, header ...string) error {
+	var expected string
+	if len(header) == 0 {
+		expected = r.Header.Get(api.AmzExpectedBucketOwner)
+	} else {
+		expected = header[0]
+	}
+
+	if len(expected) == 0 {
+		return nil
+	}
+
+	bktInfo, err := h.obj.GetBucketInfo(r.Context(), bucket)
+	if err != nil {
+		return err
+	}
+
+	return checkOwner(bktInfo, expected)
+}

api/headers.go

@@ -39,6 +39,7 @@ const (
 	AmzGrantRead                 = "X-Amz-Grant-Read"
 	AmzGrantWrite                = "X-Amz-Grant-Write"
 	AmzExpectedBucketOwner       = "X-Amz-Expected-Bucket-Owner"
+	AmzSourceExpectedBucketOwner = "X-Amz-Source-Expected-Bucket-Owner"
 
 	ContainerID = "X-Container-Id"
 )