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 "signatureengine.hxx"
  22 #include <com/sun/star/xml/crypto/XMLSignatureTemplate.hpp>
  23 #include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
  24 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
  25
  26 using namespace com::sun::star::uno;
  27 namespace cssu = com::sun::star::uno;
  28 namespace cssl = com::sun::star::lang;
  29 namespace cssxc = com::sun::star::xml::crypto;
  30 namespace cssxw = com::sun::star::xml::wrapper;
  31
  32 SignatureEngine::SignatureEngine( const Reference<XComponentContext> & xContext)
  33     : m_xContext(xContext), 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  *   INPUTS
  55  *  empty
  56  *
  57  *   RESULT
  58  *  bReady - true if all conditions are satisfied, false otherwise
  59  *
  60  *   AUTHOR
  61  *  Michael Mi
  62  *  Email: michael.mi@sun.com
  63  ******************************************************************************/
  64 {
  65     bool rc = true;
  66
  67     sal_Int32 nKeyInc = 0;
  68     if (m_nIdOfKeyEC != 0)
  69     {
  70         nKeyInc = 1;
  71     }
  72
  73     if (m_bMissionDone ||
  74         m_nIdOfKeyEC == -1 ||
  75         m_nTotalReferenceNumber == -1 ||
  76         m_nTotalReferenceNumber+1+nKeyInc > m_nNumOfResolvedReferences)
  77     {
  78         rc = false;
  79     }
  80
  81     return rc;
  82 }
  83
  84 void SignatureEngine::tryToPerform( )
  85         throw (cssu::Exception, cssu::RuntimeException)
  86 /****** SignatureEngine/tryToPerform *****************************************
  87  *
  88  *   NAME
  89  *  tryToPerform -- tries to perform the signature operation.
  90  *
  91  *   SYNOPSIS
  92  *  tryToPerform( );
  93  *
  94  *   FUNCTION
  95  *  if the situation is ready, perform following operations.
  96  *  1. prepares a signature template;
  97  *  2. calls the signature bridge component;
  98  *  3. clears up all used resources;
  99  *  4. notifies the result listener;
 100  *  5. sets the "accomplishment" flag.
 101  *
 102  *   INPUTS
 103  *  empty
 104  *
 105  *   RESULT
 106  *  empty
 107  *
 108  *   AUTHOR
 109  *  Michael Mi
 110  *  Email: michael.mi@sun.com
 111  ******************************************************************************/
 112 {
 113     if (checkReady())
 114     {
 115         cssu::Reference < cssxc::XXMLSignatureTemplate >
 116             xSignatureTemplate = cssxc::XMLSignatureTemplate::create( m_xContext );
 117
 118         cssu::Reference< cssxw::XXMLElementWrapper >
 119             xXMLElement = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
 120
 121         xSignatureTemplate->setTemplate(xXMLElement);
 122
 123         std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 124
 125         for( ; ii != m_vReferenceIds.end() ; ++ii )
 126         {
 127             xXMLElement = m_xSAXEventKeeper->getElement( *ii );
 128             xSignatureTemplate->setTarget(xXMLElement);
 129         }
 130
 131         /*
 132          * set the Uri binding
 133          */
 134         xSignatureTemplate->setBinding( this );
 135
 136         startEngine( xSignatureTemplate );
 137
 138         /*
 139          * done
 140          */
 141         clearUp( );
 142
 143         notifyResultListener();
 144
 145         m_bMissionDone = true;
 146     }
 147 }
 148
 149 void SignatureEngine::clearUp( ) const
 150 /****** SignatureEngine/clearUp **********************************************
 151  *
 152  *   NAME
 153  *  clearUp -- clear up all resources used by this operation.
 154  *
 155  *   SYNOPSIS
 156  *  clearUp( );
 157  *
 158  *   FUNCTION
 159  *  cleaning resources up includes:
 160  *  1. releases the ElementCollector for the signature template element;
 161  *  2. releases ElementCollectors for referenced elements;
 162  *  3. releases the ElementCollector for the key element, if there is one.
 163  *
 164  *   INPUTS
 165  *  empty
 166  *
 167  *   RESULT
 168  *  empty
 169  *
 170  *   AUTHOR
 171  *  Michael Mi
 172  *  Email: michael.mi@sun.com
 173  ******************************************************************************/
 174 {
 175     cssu::Reference < cssxc::sax::XReferenceResolvedBroadcaster >
 176         xReferenceResolvedBroadcaster( m_xSAXEventKeeper, cssu::UNO_QUERY );
 177     xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 178         m_nIdOfTemplateEC,
 179         static_cast<const cssu::Reference < cssxc::sax::XReferenceResolvedListener > >((SecurityEngine *)this));
 180
 181     m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
 182
 183     std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 184
 185     for( ; ii != m_vReferenceIds.end() ; ++ii )
 186     {
 187         xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 188             *ii,
 189             static_cast<const cssu::Reference < cssxc::sax::XReferenceResolvedListener > >((SecurityEngine *)this));
 190         m_xSAXEventKeeper->removeElementCollector(*ii);
 191     }
 192
 193     if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
 194     {
 195         m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
 196     }
 197 }
 198
 199 /* XReferenceCollector */
 200 void SAL_CALL SignatureEngine::setReferenceCount( sal_Int32 count )
 201     throw (cssu::Exception, cssu::RuntimeException, std::exception)
 202 {
 203     m_nTotalReferenceNumber = count;
 204     tryToPerform();
 205 }
 206
 207 void SAL_CALL SignatureEngine::setReferenceId( sal_Int32 id )
 208     throw (cssu::Exception, cssu::RuntimeException, std::exception)
 209 {
 210     m_vReferenceIds.push_back( id );
 211 }
 212
 213 /* XUriBinding */
 214 void SAL_CALL SignatureEngine::setUriBinding(
 215     const OUString& uri,
 216     const cssu::Reference< com::sun::star::io::XInputStream >& aInputStream )
 217     throw (cssu::Exception, cssu::RuntimeException, std::exception)
 218 {
 219     m_vUris.push_back(uri);
 220     m_vXInputStreams.push_back(aInputStream);
 221 }
 222
 223 cssu::Reference< com::sun::star::io::XInputStream > SAL_CALL SignatureEngine::getUriBinding( const OUString& uri )
 224     throw (cssu::Exception, cssu::RuntimeException, std::exception)
 225 {
 226     cssu::Reference< com::sun::star::io::XInputStream > xInputStream;
 227
 228     int size = m_vUris.size();
 229
 230     for( int i=0; i<size; ++i)
 231     {
 232         if (m_vUris[i] == uri)
 233         {
 234             xInputStream = m_vXInputStreams[i];
 235             break;
 236         }
 237     }
 238
 239     return xInputStream;
 240 }
 241
 242
 243 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */