xmlsecurity: initial incremental update support in pdfverify

I plan to use this for signing purposes, but so far what's implemented
just writes out an incremental update at the end of the file, without
actually updating much (just an unreferenced appearance object).

Change-Id: I1cb40430ade6af0a25ff914ba4df670a77fcf457

1 files changed, 8 insertions, 0 deletions

diff --git a/xmlsecurity/inc/pdfio/pdfdocument.hxx b/xmlsecurity/inc/pdfio/pdfdocument.hxx
index 0eaaa0954801..2f95b7dfce48 100644
--- a/xmlsecurity/inc/pdfio/pdfdocument.hxx
+++ b/xmlsecurity/inc/pdfio/pdfdocument.hxx
@@ -13,6 +13,8 @@
 
 #include <vector>
 
+#include <com/sun/star/security/XCertificate.hpp>
+
 #include <tools/stream.hxx>
 
 #include <xmlsecuritydllapi.h>
@@ -43,6 +45,8 @@ class XMLSECURITY_DLLPUBLIC PDFDocument
     // List of object offsets we know.
     std::vector<size_t> m_aXRef;
     PDFTrailerElement* m_pTrailer;
+    /// All editing takes place in this buffer, if it happens.
+    SvMemoryStream m_aEditBuffer;
 
     static int AsHex(char ch);
     /// Decode a hex dump.
@@ -61,6 +65,10 @@ public:
     std::vector<PDFObjectElement*> GetPages();
 
     bool Read(SvStream& rStream);
+    /// Sign the read document with xCertificate in the edit buffer.
+    bool Sign(const css::uno::Reference<css::security::XCertificate>& xCertificate);
+    /// Serializes the contents of the edit buffer.
+    bool Write(SvStream& rStream);
     std::vector<PDFObjectElement*> GetSignatureWidgets();
     /// Return value is about if we can determine a result, rInformation is about the actual result.
     static bool ValidateSignature(SvStream& rStream, PDFObjectElement* pSignature, SignatureInformation& rInformation);