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xmlsecurity PDF sign: use unique ID for a new signature

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Otherwise Adobe Acrobat thinks they are different versions of the same
signature.

Change-Id: I454c7d87106e348fd70f18fad83f2c3aeda29dff
Reviewed-on: https://gerrit.libreoffice.org/30278
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>
This commit is contained in:
Miklos Vajna
2016-10-25 19:55:16 +02:00
parent 20f2a6b3f7
commit b1434b95d1
1 changed files with 7 additions and 1 deletions
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8
xmlsecurity/source/pdfio/pdfdocument.cxx
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@@ -297,6 +297,10 @@ bool PDFDocument::RemoveSignature(size_t nPosition)
bool PDFDocument::Sign(const uno::Reference<security::XCertificate>& xCertificate, const OUString& rDescription)
{
// Decide what identifier to use for the new signature.
std::vector<PDFObjectElement*> aSignatures = GetSignatureWidgets();
sal_uInt32 nNextSignature = aSignatures.size() + 1;
m_aEditBuffer.WriteCharPtr("\n");
// Write signature object.
@@ -368,7 +372,9 @@ bool PDFDocument::Sign(const uno::Reference<security::XCertificate>& xCertificat
m_aEditBuffer.WriteCharPtr("/P ");
m_aEditBuffer.WriteUInt32AsString(pFirstPage->GetObjectValue());
m_aEditBuffer.WriteCharPtr(" 0 R\n");
m_aEditBuffer.WriteCharPtr("/T(Signature1)\n");
m_aEditBuffer.WriteCharPtr("/T(Signature");
m_aEditBuffer.WriteUInt32AsString(nNextSignature);
m_aEditBuffer.WriteCharPtr(")\n");
m_aEditBuffer.WriteCharPtr("/V ");
m_aEditBuffer.WriteUInt32AsString(nSignatureId);
m_aEditBuffer.WriteCharPtr(" 0 R\n");