pdfium: add signature and trailer end getter wrappers

So PDFiumDocument::getPointer() can be retired.

Change-Id: I77c34c3e263bd6f39e06e50f621f2eaff804c716
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106079
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

3 files changed, 22 insertions, 6 deletions

diff --git a/include/vcl/filter/PDFiumLibrary.hxx b/include/vcl/filter/PDFiumLibrary.hxx
index 014505d7739d..2663a6cf03ae 100644
--- a/include/vcl/filter/PDFiumLibrary.hxx
+++ b/include/vcl/filter/PDFiumLibrary.hxx
@@ -246,11 +246,13 @@ public:
     // Page size in points
     basegfx::B2DSize getPageSize(int nIndex);
     int getPageCount();
+    int getSignatureCount();
     int getFileVersion();
     bool saveWithVersion(SvMemoryStream& rStream, int nFileVersion);
 
     std::unique_ptr<PDFiumPage> openPage(int nIndex);
-    FPDF_DOCUMENT getPointer() { return mpPdfDocument; }
+    FPDF_SIGNATURE getSignature(int nIndex);
+    std::vector<unsigned int> getTrailerEnds();
 };
 
 struct PDFiumLibrary final : public rtl::StaticWithInit<std::shared_ptr<PDFium>, PDFiumLibrary>
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index ae1588e4a268..391a93f90ffb 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -19,6 +19,7 @@
 #include <fpdf_edit.h>
 #include <fpdf_text.h>
 #include <fpdf_save.h>
+#include <fpdf_signature.h>
 
 #include <osl/endian.h>
 #include <vcl/bitmap.hxx>
@@ -212,6 +213,19 @@ std::unique_ptr<PDFiumPage> PDFiumDocument::openPage(int nIndex)
     return pPDFiumPage;
 }
 
+FPDF_SIGNATURE PDFiumDocument::getSignature(int nIndex)
+{
+    return FPDF_GetSignatureObject(mpPdfDocument, nIndex);
+}
+
+std::vector<unsigned int> PDFiumDocument::getTrailerEnds()
+{
+    int nNumTrailers = FPDF_GetTrailerEnds(mpPdfDocument, nullptr, 0);
+    std::vector<unsigned int> aTrailerEnds(nNumTrailers);
+    FPDF_GetTrailerEnds(mpPdfDocument, aTrailerEnds.data(), aTrailerEnds.size());
+    return aTrailerEnds;
+}
+
 basegfx::B2DSize PDFiumDocument::getPageSize(int nIndex)
 {
     basegfx::B2DSize aSize;
@@ -225,6 +239,8 @@ basegfx::B2DSize PDFiumDocument::getPageSize(int nIndex)
 
 int PDFiumDocument::getPageCount() { return FPDF_GetPageCount(mpPdfDocument); }
 
+int PDFiumDocument::getSignatureCount() { return FPDF_GetSignatureCount(mpPdfDocument); }
+
 int PDFiumDocument::getFileVersion()
 {
     int nFileVersion = 0;
diff --git a/xmlsecurity/source/helper/pdfsignaturehelper.cxx b/xmlsecurity/source/helper/pdfsignaturehelper.cxx
index 6b8eefef7099..6e0f1cfb176b 100644
--- a/xmlsecurity/source/helper/pdfsignaturehelper.cxx
+++ b/xmlsecurity/source/helper/pdfsignaturehelper.cxx
@@ -472,7 +472,7 @@ bool PDFSignatureHelper::ReadAndVerifySignatureSvStream(SvStream& rStream)
         return false;
     }
 
-    int nSignatureCount = FPDF_GetSignatureCount(pPdfDocument->getPointer());
+    int nSignatureCount = pPdfDocument->getSignatureCount();
     if (nSignatureCount <= 0)
     {
         return true;
@@ -480,7 +480,7 @@ bool PDFSignatureHelper::ReadAndVerifySignatureSvStream(SvStream& rStream)
     std::vector<Signature> aSignatures(nSignatureCount);
     for (int i = 0; i < nSignatureCount; ++i)
     {
-        FPDF_SIGNATURE pSignature = FPDF_GetSignatureObject(pPdfDocument->getPointer(), i);
+        FPDF_SIGNATURE pSignature = pPdfDocument->getSignature(i);
         std::vector<std::pair<size_t, size_t>> aByteRanges;
         GetByteRangesFromPDF(pSignature, aByteRanges);
         aSignatures[i] = Signature{ pSignature, aByteRanges };
@@ -496,9 +496,7 @@ bool PDFSignatureHelper::ReadAndVerifySignatureSvStream(SvStream& rStream)
         }
     }
 
-    int nNumTrailers = FPDF_GetTrailerEnds(pPdfDocument->getPointer(), nullptr, 0);
-    std::vector<unsigned int> aTrailerEnds(nNumTrailers);
-    FPDF_GetTrailerEnds(pPdfDocument->getPointer(), aTrailerEnds.data(), aTrailerEnds.size());
+    std::vector<unsigned int> aTrailerEnds = pPdfDocument->getTrailerEnds();
 
     m_aSignatureInfos.clear();