For being able to sign a PDF using its existing signature field, I added this
constructor to PdfSignatureField.cpp:
60c60,71
< void PdfSignatureField::SetAppearanceStream( PdfXObject* pObject )
---
> PdfSignatureField::PdfSignatureField( const PdfField & rhs )
> : PdfField( rhs )
> {
> if( this->GetType() != ePdfField_Signature )
> {
> PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidDataType, "Field cannot be
> converted into a PdfSignatureField" );
> }
> m_pSignatureObj = NULL;
> Init();
> }
Hopefully i haven´t overlooked any options to sign a PDF without creating a new
signature field?
Additionally i changed PdfOutputDevice.cpp the following way:
59c57
< std::fstream *pStream = new std::fstream(pszFilename,
std::fstream::binary|std::ios_base::in | std::ios_base::out |
std::ios_base::trunc);
---
> std::fstream *pStream = new std::fstream(pszFilename,
> std::fstream::binary|std::ios_base::in | std::ios_base::out);
Otherwise, it would delete the file at opening.
Please let me know if there is a way to sign an existing file without changing
PoDoFo. If no, is it possible to take this changes into the next revision?
Regards
Thomas
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