use more TempFileFastService in xmlsecurity

Change-Id: I905e1e126e96195212887feb190e87f7f4da5adf
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/141646
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

xmlsecurity/inc/documentsignaturemanager.hxx

@@ -28,6 +28,7 @@
 #include "documentsignaturehelper.hxx"
 
 #include <com/sun/star/xml/crypto/XSEInitializer.hpp>
+#include <unotools/tempfile.hxx>
 
 namespace com::sun::star
 {
@@ -67,7 +68,7 @@ private:
     css::uno::Sequence<css::uno::Sequence<css::beans::PropertyValue>> m_manifest;
     css::uno::Reference<css::io::XStream> mxSignatureStream;
     css::uno::Reference<css::frame::XModel> mxModel;
-    css::uno::Reference<css::io::XStream> mxTempSignatureStream;
+    rtl::Reference<utl::TempFileFastService> mxTempSignatureStream;
     /// Storage containing all OOXML signatures, unused for ODF.
     css::uno::Reference<css::embed::XStorage> mxTempSignatureStorage;
     css::uno::Reference<css::xml::crypto::XSEInitializer> mxSEInitializer;

xmlsecurity/source/helper/documentsignaturemanager.cxx

@@ -237,7 +237,7 @@ SignatureStreamHelper DocumentSignatureManager::ImplOpenSignatureStream(sal_Int3
         if (nStreamOpenMode & embed::ElementModes::TRUNCATE)
         {
             //We write always into a new temporary stream.
-            mxTempSignatureStream.set(io::TempFile::create(mxContext), uno::UNO_QUERY_THROW);
+            mxTempSignatureStream = new utl::TempFileFastService;
             if (aHelper.nStorageFormat != embed::StorageFormats::OFOPXML)
                 aHelper.xSignatureStream = mxTempSignatureStream;
             else