signatureengine.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 */
 
#pragma once
 
#include <com/sun/star/xml/crypto/sax/XReferenceResolvedListener.hpp>
#include <com/sun/star/xml/crypto/sax/XReferenceCollector.hpp>
#include <com/sun/star/xml/crypto/sax/XKeyCollector.hpp>
#include <com/sun/star/xml/crypto/sax/XMissionTaker.hpp>
#include <com/sun/star/xml/crypto/XUriBinding.hpp>
 
#include <cppuhelper/implbase.hxx>
 
#include <xmlsecuritydllapi.h>
#include <framework/securityengine.hxx>
 
#include <vector>
 
namespace com::sun::star::io { class XInputStream; }
namespace com::sun::star::xml::crypto { class XXMLSignature; }
namespace rtl { template <class reference_type> class Reference; }
 
class XMLSignatureTemplateImpl;
 
class SignatureEngine : public cppu::ImplInheritanceHelper
<
    SecurityEngine,
    css::xml::crypto::sax::XReferenceCollector,
    css::xml::crypto::XUriBinding
>
/****** signatureengine.hxx/CLASS SignatureEngine *****************************
 *
 *   NAME
 *  SignatureEngine -- Base class of SignatureCreator and SignatureVerifier
 *
 *   FUNCTION
 *  Maintains common members and methods related with signature operation.
 ******************************************************************************/
{
protected:
 
    /*
     * the Signature bridge component, which performs signature generation
     * and verification based on xmlsec library.
     */
    css::uno::Reference< css::xml::crypto::XXMLSignature > m_xXMLSignature;
 
    /*
     * a collection of ElementCollector's ids. Each ElementCollector
     * represents one element signed by this signature.
     */
    std::vector< sal_Int32 > m_vReferenceIds;
 
    /*
     * remembers how many references this signature has.
     */
    sal_Int32 m_nTotalReferenceNumber;
 
    /*
     * a collection of Uri binding.
     *
     * the m_vUris is used to hold the Uri strings, and the m_vXInputStreams is used
     * to hold corresponding bound XInputStream interface.
     */
    std::vector< OUString > m_vUris;
    std::vector< css::uno::Reference< css::io::XInputStream > > m_vXInputStreams;
 
protected:
    explicit SignatureEngine();
    virtual ~SignatureEngine() override {};
 
    virtual void tryToPerform( ) override;
    virtual void clearUp( ) const override;
    bool checkReady() const;
 
    /*
     * starts the main function. This method will be implemented by any sub-class.
     * For a SignatureCreator, it performs signing operation;
     * for a SignatureVerifier, verification operation is performed.
     */
    virtual void startEngine( const rtl::Reference<XMLSignatureTemplateImpl>&)
        {};
 
public:
    /* XReferenceCollector */
    virtual void SAL_CALL setReferenceCount( sal_Int32 count ) override;
 
    virtual void SAL_CALL setReferenceId( sal_Int32 id ) override;
 
    /* XUriBinding */
    virtual void SAL_CALL setUriBinding(
        const OUString& uri,
        const css::uno::Reference< css::io::XInputStream >& aInputStream ) override;
    virtual css::uno::Reference< css::io::XInputStream >
        SAL_CALL getUriBinding( const OUString& uri ) override;
};
 
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