diff --git a/api/handler/delete.go b/api/handler/delete.go
index 39769ff..8ac9fa9 100644
--- a/api/handler/delete.go
+++ b/api/handler/delete.go
@@ -246,7 +246,7 @@ func (h *handler) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err = checkOwner(bktInfo, reqInfo.User); err != nil {
-		h.logAndSendError(w, "request owner id does not match bucket owner id", reqInfo, err)
+		h.logAndSendError(ctx, w, "request owner id does not match bucket owner id", reqInfo, err)
 		return
 	}
 
diff --git a/api/layer/multipart_upload.go b/api/layer/multipart_upload.go
index ed7612c..f0e78b4 100644
--- a/api/layer/multipart_upload.go
+++ b/api/layer/multipart_upload.go
@@ -224,8 +224,12 @@ func (n *Layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 	}
 
 	decSize := p.Size
+	md5Hash := md5.New()
 	if p.Info.Encryption.Enabled() {
-		r, encSize, err := encryptionReader(p.Reader, p.Size, p.Info.Encryption.Key())
+		rr := wrapReader(p.Reader, 64*1024, func(buf []byte) {
+			md5Hash.Write(buf)
+		})
+		r, encSize, err := encryptionReader(rr, p.Size, p.Info.Encryption.Key())
 		if err != nil {
 			return nil, fmt.Errorf("failed to create ecnrypted reader: %w", err)
 		}
@@ -246,7 +250,12 @@ func (n *Layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 		if err != nil {
 			return nil, apierr.GetAPIError(apierr.ErrInvalidDigest)
 		}
-		if hex.EncodeToString(hashBytes) != hex.EncodeToString(createdObj.MD5Sum) {
+
+		match := hex.EncodeToString(hashBytes) == hex.EncodeToString(createdObj.MD5Sum)
+		if p.Info.Encryption.Enabled() {
+			match = hex.EncodeToString(hashBytes) == hex.EncodeToString(md5Hash.Sum(nil))
+		}
+		if !match {
 			prm := frostfs.PrmObjectDelete{
 				Object:    createdObj.ID,
 				Container: bktInfo.CID,
@@ -449,7 +458,6 @@ func (n *Layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipar
 		initMetadata[AttributeHMACKey] = encInfo.HMACKey
 		initMetadata[AttributeHMACSalt] = encInfo.HMACSalt
 		initMetadata[AttributeDecryptedSize] = strconv.FormatUint(multipartObjetSize, 10)
-		multipartObjetSize = encMultipartObjectSize
 	}
 
 	partsData, err := json.Marshal(parts)