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/XXMLSignatureTemplate.hpp>
  23 #include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
  24 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
  25
  26 namespace cssu = com::sun::star::uno;
  27 namespace cssl = com::sun::star::lang;
  28 namespace cssxc = com::sun::star::xml::crypto;
  29 namespace cssxw = com::sun::star::xml::wrapper;
  30
  31 #define SIGNATURE_TEMPLATE "com.sun.star.xml.crypto.XMLSignatureTemplate"
  32
  33 SignatureEngine::SignatureEngine( )
  34     :m_nTotalReferenceNumber(-1)
  35 {
  36 }
  37
  38 bool SignatureEngine::checkReady() const
  39 /****** SignatureEngine/checkReady *******************************************
  40  *
  41  *   NAME
  42  *  checkReady -- checks the conditions for the main operation.
  43  *
  44  *   SYNOPSIS
  45  *  bReady = checkReady( );
  46  *
  47  *   FUNCTION
  48  *  checks whether all following conditions are satisfied:
  49  *  1. the main operation has't begun yet;
  50  *  2. the key material is known;
  51  *  3. the amount of reference is known;
  52  *  4. all of referenced elements, the key element and the signature
  53  *     template are bufferred.
  54  *
  55  *   INPUTS
  56  *  empty
  57  *
  58  *   RESULT
  59  *  bReady - true if all conditions are satisfied, false otherwise
  60  *
  61  *   AUTHOR
  62  *  Michael Mi
  63  *  Email: michael.mi@sun.com
  64  ******************************************************************************/
  65 {
  66     bool rc = true;
  67
  68     sal_Int32 nKeyInc = 0;
  69     if (m_nIdOfKeyEC != 0)
  70     {
  71         nKeyInc = 1;
  72     }
  73
  74     if (m_bMissionDone ||
  75         m_nIdOfKeyEC == -1 ||
  76         m_nTotalReferenceNumber == -1 ||
  77         m_nTotalReferenceNumber+1+nKeyInc > m_nNumOfResolvedReferences)
  78     {
  79         rc = false;
  80     }
  81
  82     return rc;
  83 }
  84
  85 void SignatureEngine::tryToPerform( )
  86         throw (cssu::Exception, cssu::RuntimeException)
  87 /****** SignatureEngine/tryToPerform *****************************************
  88  *
  89  *   NAME
  90  *  tryToPerform -- tries to perform the signature operation.
  91  *
  92  *   SYNOPSIS
  93  *  tryToPerform( );
  94  *
  95  *   FUNCTION
  96  *  if the situation is ready, perform following operations.
  97  *  1. prepares a signature template;
  98  *  2. calls the signature bridge component;
  99  *  3. clears up all used resources;
 100  *  4. notifies the result listener;
 101  *  5. sets the "accomplishment" flag.
 102  *
 103  *   INPUTS
 104  *  empty
 105  *
 106  *   RESULT
 107  *  empty
 108  *
 109  *   AUTHOR
 110  *  Michael Mi
 111  *  Email: michael.mi@sun.com
 112  ******************************************************************************/
 113 {
 114     if (checkReady())
 115     {
 116         const OUString ouSignatureTemplate ( SIGNATURE_TEMPLATE );
 117         cssu::Reference < cssxc::XXMLSignatureTemplate >
 118             xSignatureTemplate( mxMSF->createInstance( ouSignatureTemplate ), cssu::UNO_QUERY );
 119
 120         OSL_ASSERT( xSignatureTemplate.is() );
 121
 122         cssu::Reference< cssxw::XXMLElementWrapper >
 123             xXMLElement = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
 124
 125         xSignatureTemplate->setTemplate(xXMLElement);
 126
 127         std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 128
 129         for( ; ii != m_vReferenceIds.end() ; ++ii )
 130         {
 131             xXMLElement = m_xSAXEventKeeper->getElement( *ii );
 132             xSignatureTemplate->setTarget(xXMLElement);
 133         }
 134
 135         /*
 136          * set the Uri binding
 137          */
 138         xSignatureTemplate->setBinding( this );
 139
 140         startEngine( xSignatureTemplate );
 141
 142         /*
 143          * done
 144          */
 145         clearUp( );
 146
 147         notifyResultListener();
 148
 149         m_bMissionDone = true;
 150     }
 151 }
 152
 153 void SignatureEngine::clearUp( ) const
 154 /****** SignatureEngine/clearUp **********************************************
 155  *
 156  *   NAME
 157  *  clearUp -- clear up all resources used by this operation.
 158  *
 159  *   SYNOPSIS
 160  *  clearUp( );
 161  *
 162  *   FUNCTION
 163  *  cleaning resources up includes:
 164  *  1. releases the ElementCollector for the signature template element;
 165  *  2. releases ElementCollectors for referenced elements;
 166  *  3. releases the ElementCollector for the key element, if there is one.
 167  *
 168  *   INPUTS
 169  *  empty
 170  *
 171  *   RESULT
 172  *  empty
 173  *
 174  *   AUTHOR
 175  *  Michael Mi
 176  *  Email: michael.mi@sun.com
 177  ******************************************************************************/
 178 {
 179     cssu::Reference < cssxc::sax::XReferenceResolvedBroadcaster >
 180         xReferenceResolvedBroadcaster( m_xSAXEventKeeper, cssu::UNO_QUERY );
 181     xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 182         m_nIdOfTemplateEC,
 183         (const cssu::Reference < cssxc::sax::XReferenceResolvedListener >)((SecurityEngine *)this));
 184
 185     m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
 186
 187     std::vector< sal_Int32 >::const_iterator ii = m_vReferenceIds.begin();
 188
 189     for( ; ii != m_vReferenceIds.end() ; ++ii )
 190     {
 191         xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 192             *ii,
 193             (const cssu::Reference < cssxc::sax::XReferenceResolvedListener >)((SecurityEngine *)this));
 194         m_xSAXEventKeeper->removeElementCollector(*ii);
 195     }
 196
 197     if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
 198     {
 199         m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
 200     }
 201 }
 202
 203 /* XReferenceCollector */
 204 void SAL_CALL SignatureEngine::setReferenceCount( sal_Int32 count )
 205     throw (cssu::Exception, cssu::RuntimeException)
 206 {
 207     m_nTotalReferenceNumber = count;
 208     tryToPerform();
 209 }
 210
 211 void SAL_CALL SignatureEngine::setReferenceId( sal_Int32 id )
 212     throw (cssu::Exception, cssu::RuntimeException)
 213 {
 214     m_vReferenceIds.push_back( id );
 215 }
 216
 217 /* XUriBinding */
 218 void SAL_CALL SignatureEngine::setUriBinding(
 219     const OUString& uri,
 220     const cssu::Reference< com::sun::star::io::XInputStream >& aInputStream )
 221     throw (cssu::Exception, cssu::RuntimeException)
 222 {
 223     m_vUris.push_back(uri);
 224     m_vXInputStreams.push_back(aInputStream);
 225 }
 226
 227 cssu::Reference< com::sun::star::io::XInputStream > SAL_CALL SignatureEngine::getUriBinding( const OUString& uri )
 228     throw (cssu::Exception, cssu::RuntimeException)
 229 {
 230     cssu::Reference< com::sun::star::io::XInputStream > xInputStream;
 231
 232     int size = m_vUris.size();
 233
 234     for( int i=0; i<size; ++i)
 235     {
 236         if (m_vUris[i] == uri)
 237         {
 238             xInputStream = m_vXInputStreams[i];
 239             break;
 240         }
 241     }
 242
 243     return xInputStream;
 244 }
 245
 246
 247 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */