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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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#ifndef _SIGNATUREENGINE_HXX
#define _SIGNATUREENGINE_HXX

#include <com/sun/star/xml/crypto/sax/XReferenceResolvedListener.hpp>
#include <com/sun/star/xml/crypto/sax/XReferenceResolvedBroadcaster.hpp>
#ifndef _COM_SUN_STAR_XML_CRYPTO_SAX_XSIGNATURECOLLECTOR_HPP_
#include <com/sun/star/xml/crypto/sax/XReferenceCollector.hpp>
#endif
#include <com/sun/star/xml/crypto/sax/XKeyCollector.hpp>
#include <com/sun/star/xml/crypto/sax/XMissionTaker.hpp>
#include <com/sun/star/xml/crypto/sax/XSAXEventKeeper.hpp>
#include <com/sun/star/xml/crypto/XXMLSecurityContext.hpp>
#include <com/sun/star/xml/crypto/XXMLSignature.hpp>
#include <com/sun/star/xml/crypto/XUriBinding.hpp>
#include <com/sun/star/io/XInputStream.hpp>

#include <cppuhelper/implbase2.hxx>

#include "securityengine.hxx"

#ifndef INCLUDED_VECTOR
#include <vector>
#define INCLUDED_VECTOR
#endif

class SignatureEngine : public cppu::ImplInheritanceHelper2
<
    SecurityEngine,
    com::sun::star::xml::crypto::sax::XReferenceCollector,
    com::sun::star::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.
 *
 *   HISTORY
 *  05.01.2004 -    Interface supported: XReferenceCollector
 *
 *   AUTHOR
 *  Michael Mi
 *  Email: michael.mi@sun.com
 ******************************************************************************/
{
protected:

    /*
     * the Signature bridge component, which performs signature generation
     * and verification based on xmlsec library.
     */
    com::sun::star::uno::Reference<
        com::sun::star::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 binded XInputStream interface.
     */
    std::vector< rtl::OUString > m_vUris;
    std::vector< com::sun::star::uno::Reference<
        com::sun::star::io::XInputStream > > m_vXInputStreams;

protected:
    SignatureEngine( );
    virtual ~SignatureEngine() {};

    virtual void tryToPerform( )
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException);
    virtual void clearUp( ) const;
    virtual 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 com::sun::star::uno::Reference<
                              com::sun::star::xml::crypto::XXMLSignatureTemplate >&)
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException)
        {};

public:
    /* XReferenceCollector */
    virtual void SAL_CALL setReferenceCount( sal_Int32 count )
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException);

    virtual void SAL_CALL setReferenceId( sal_Int32 id )
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException);

    /* XUriBinding */
    virtual void SAL_CALL setUriBinding(
        const rtl::OUString& uri,
        const com::sun::star::uno::Reference<
            com::sun::star::io::XInputStream >& aInputStream )
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException);
    virtual com::sun::star::uno::Reference< com::sun::star::io::XInputStream >
        SAL_CALL getUriBinding( const rtl::OUString& uri )
        throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException);
};

#endif