xmlsecurity/source/framework/signatureengine.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <framework/signatureengine.hxx>
  22 #include <framework/xmlsignaturetemplateimpl.hxx>
  23 #include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
  24 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
  25 #include <rtl/ref.hxx>
  26
  27 using namespace com::sun::star::uno;
  28 namespace cssu = com::sun::star::uno;
  29 namespace cssxc = com::sun::star::xml::crypto;
  30 namespace cssxw = com::sun::star::xml::wrapper;
  31
  32 SignatureEngine::SignatureEngine()
  33     : m_nTotalReferenceNumber(-1)
  34 {
  35 }
  36
  37 bool SignatureEngine::checkReady() const
  38 /****** SignatureEngine/checkReady *******************************************
  39  *
  40  *   NAME
  41  *  checkReady -- checks the conditions for the main operation.
  42  *
  43  *   SYNOPSIS
  44  *  bReady = checkReady( );
  45  *
  46  *   FUNCTION
  47  *  checks whether all following conditions are satisfied:
  48  *  1. the main operation has't begun yet;
  49  *  2. the key material is known;
  50  *  3. the amount of reference is known;
  51  *  4. all of referenced elements, the key element and the signature
  52  *     template are bufferred.
  53  *
  54  *   RESULT
  55  *  bReady - true if all conditions are satisfied, false otherwise
  56  ******************************************************************************/
  57 {
  58     bool rc = true;
  59
  60     sal_Int32 nKeyInc = 0;
  61     if (m_nIdOfKeyEC != 0)
  62     {
  63         nKeyInc = 1;
  64     }
  65
  66     if (m_bMissionDone ||
  67         m_nIdOfKeyEC == -1 ||
  68         m_nTotalReferenceNumber == -1 ||
  69         m_nTotalReferenceNumber+1+nKeyInc > m_nNumOfResolvedReferences)
  70     {
  71         rc = false;
  72     }
  73
  74     return rc;
  75 }
  76
  77 void SignatureEngine::tryToPerform( )
  78 /****** SignatureEngine/tryToPerform *****************************************
  79  *
  80  *   NAME
  81  *  tryToPerform -- tries to perform the signature operation.
  82  *
  83  *   FUNCTION
  84  *  if the situation is ready, perform following operations.
  85  *  1. prepares a signature template;
  86  *  2. calls the signature bridge component;
  87  *  3. clears up all used resources;
  88  *  4. notifies the result listener;
  89  *  5. sets the "accomplishment" flag.
  90  ******************************************************************************/
  91 {
  92     if (checkReady())
  93     {
  94         rtl::Reference<XMLSignatureTemplateImpl> xSignatureTemplate = new XMLSignatureTemplateImpl();
  95
  96         cssu::Reference< cssxw::XXMLElementWrapper >
  97             xXMLElement = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
  98
  99         xSignatureTemplate->setTemplate(xXMLElement);
 100
 101         std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 102
 103         for( ; ii != m_vReferenceIds.end() ; ++ii )
 104         {
 105             xXMLElement = m_xSAXEventKeeper->getElement( *ii );
 106             xSignatureTemplate->setTarget(xXMLElement);
 107         }
 108
 109         /*
 110          * set the Uri binding
 111          */
 112         xSignatureTemplate->setBinding( this );
 113
 114         startEngine(xSignatureTemplate);
 115
 116         /*
 117          * done
 118          */
 119         clearUp( );
 120
 121         notifyResultListener();
 122
 123         m_bMissionDone = true;
 124     }
 125 }
 126
 127 void SignatureEngine::clearUp( ) const
 128 /****** SignatureEngine/clearUp **********************************************
 129  *
 130  *   NAME
 131  *  clearUp -- clear up all resources used by this operation.
 132  *
 133  *   FUNCTION
 134  *  cleaning resources up includes:
 135  *  1. releases the ElementCollector for the signature template element;
 136  *  2. releases ElementCollectors for referenced elements;
 137  *  3. releases the ElementCollector for the key element, if there is one.
 138  ******************************************************************************/
 139 {
 140     cssu::Reference < cssxc::sax::XReferenceResolvedBroadcaster >
 141         xReferenceResolvedBroadcaster( m_xSAXEventKeeper, cssu::UNO_QUERY );
 142     xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 143         m_nIdOfTemplateEC,
 144         static_cast<const cssu::Reference < cssxc::sax::XReferenceResolvedListener > >(static_cast<SecurityEngine *>(const_cast<SignatureEngine *>(this))));
 145
 146     m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
 147
 148     std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 149
 150     for( ; ii != m_vReferenceIds.end() ; ++ii )
 151     {
 152         xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 153             *ii,
 154             static_cast<const cssu::Reference < cssxc::sax::XReferenceResolvedListener > >(static_cast<SecurityEngine *>(const_cast<SignatureEngine *>(this))));
 155         m_xSAXEventKeeper->removeElementCollector(*ii);
 156     }
 157
 158     if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
 159     {
 160         m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
 161     }
 162 }
 163
 164 /* XReferenceCollector */
 165 void SAL_CALL SignatureEngine::setReferenceCount( sal_Int32 count )
 166 {
 167     m_nTotalReferenceNumber = count;
 168     tryToPerform();
 169 }
 170
 171 void SAL_CALL SignatureEngine::setReferenceId( sal_Int32 id )
 172 {
 173     m_vReferenceIds.push_back( id );
 174 }
 175
 176 /* XUriBinding */
 177 void SAL_CALL SignatureEngine::setUriBinding(
 178     const OUString& uri,
 179     const cssu::Reference< css::io::XInputStream >& aInputStream )
 180 {
 181     m_vUris.push_back(uri);
 182     m_vXInputStreams.push_back(aInputStream);
 183 }
 184
 185 cssu::Reference< css::io::XInputStream > SAL_CALL SignatureEngine::getUriBinding( const OUString& uri )
 186 {
 187     cssu::Reference< css::io::XInputStream > xInputStream;
 188
 189     int size = m_vUris.size();
 190
 191     for( int i=0; i<size; ++i)
 192     {
 193         if (m_vUris[i] == uri)
 194         {
 195             xInputStream = m_vXInputStreams[i];
 196             break;
 197         }
 198     }
 199
 200     return xInputStream;
 201 }
 202
 203
 204 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */