xmlsecurity PDF verify: don't abort read on partial sign

Map it to the partially signed (not all streams) ODF concept instead.

Change-Id: I7fc931e622b9f10a1261cd475b01a2f038e37ece
Reviewed-on: https://gerrit.libreoffice.org/31497
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

1 files changed, 2 insertions, 4 deletions

diff --git a/xmlsecurity/source/pdfio/pdfdocument.cxx b/xmlsecurity/source/pdfio/pdfdocument.cxx
index b19a043e9d05..81f8caae8655 100644
--- a/xmlsecurity/source/pdfio/pdfdocument.cxx
+++ b/xmlsecurity/source/pdfio/pdfdocument.cxx
@@ -2212,10 +2212,8 @@ bool PDFDocument::ValidateSignature(SvStream& rStream, PDFObjectElement* pSignat
     rStream.Seek(STREAM_SEEK_TO_END);
     size_t nFileEnd = rStream.Tell();
     if (bLast && (aByteRanges[1].first + aByteRanges[1].second) != nFileEnd)
-    {
-        SAL_WARN("xmlsecurity.pdfio", "PDFDocument::ValidateSignature: second range end is not the end of the file");
-        return false;
-    }
+        // Second range end is not the end of the file.
+        rInformation.bPartialDocumentSignature = true;
 
     // At this point there is no obviously missing info to validate the
     // signature.