PdfSigner.h

// SPDX-FileCopyrightText: 2021 Francesco Pretto <ceztko@gmail.com>
// SPDX-License-Identifier: LGPL-2.0-or-later OR MPL-2.0
 
#ifndef PDF_SIGNER_H
#define PDF_SIGNER_H
 
#include "PdfDeclarations.h"
 
#include "PdfMemDocument.h"
#include "PdfSignature.h"
 
namespace PoDoFo
{
    class StreamDevice;
 
    class PODOFO_API PdfSigner
    {
    public:
        PdfSigner();
        virtual ~PdfSigner();
 
        virtual void ValidateSignatureDate(const nullable<PdfDate>& date);
 
        virtual void Reset() = 0;
 
        virtual void AppendData(const bufferview& data) = 0;
 
        virtual void ComputeSignature(charbuff& contents, bool dryrun) = 0;
 
        virtual void FetchIntermediateResult(charbuff& result);
 
        virtual void ComputeSignatureDeferred(const bufferview& processedResult, charbuff& contents, bool dryrun);
 
        virtual bool SkipBufferClear() const;
 
        virtual std::string GetSignatureFilter() const;
 
        virtual std::string GetSignatureSubFilter() const = 0;
 
        virtual std::string GetSignatureType() const = 0;
 
        virtual unsigned GetSignerIdentityCount() const;
 
        virtual void UnpackIntermediateResult(const bufferview& processedResult, unsigned signerIdx, charbuff& result);
 
        virtual void AssembleProcessedResult(const bufferview& processedResult, unsigned signerIdx, charbuff& result);
 
    private:
        PdfSigner(const PdfSigner&) = delete;
        PdfSigner& operator=(const PdfSigner&) = delete;
    };
 
    PODOFO_API void SignDocument(PdfMemDocument& doc, StreamDevice& device, PdfSigner& signer,
        PdfSignature& signature, PdfSaveOptions saveOptions = PdfSaveOptions::None);
}
 
#endif // PDF_SIGNER_H