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 <rtl/ref.hxx>
  24
  25 namespace com::sun::star::xml::wrapper { class XXMLElementWrapper; }
  26
  27 using namespace com::sun::star::uno;
  28
  29 SignatureEngine::SignatureEngine()
  30     : m_nTotalReferenceNumber(-1)
  31 {
  32 }
  33
  34 bool SignatureEngine::checkReady() const
  35 /****** SignatureEngine/checkReady *******************************************
  36  *
  37  *   NAME
  38  *  checkReady -- checks the conditions for the main operation.
  39  *
  40  *   SYNOPSIS
  41  *  bReady = checkReady( );
  42  *
  43  *   FUNCTION
  44  *  checks whether all following conditions are satisfied:
  45  *  1. the main operation has't begun yet;
  46  *  2. the key material is known;
  47  *  3. the amount of reference is known;
  48  *  4. all of referenced elements, the key element and the signature
  49  *     template are buffered.
  50  *
  51  *   RESULT
  52  *  bReady - true if all conditions are satisfied, false otherwise
  53  ******************************************************************************/
  54 {
  55     bool rc = true;
  56
  57     sal_Int32 nKeyInc = 0;
  58     if (m_nIdOfKeyEC != 0)
  59     {
  60         nKeyInc = 1;
  61     }
  62
  63     if (m_bMissionDone ||
  64         m_nIdOfKeyEC == -1 ||
  65         m_nTotalReferenceNumber == -1 ||
  66         m_nTotalReferenceNumber+1+nKeyInc > m_nNumOfResolvedReferences)
  67     {
  68         rc = false;
  69     }
  70
  71     return rc;
  72 }
  73
  74 void SignatureEngine::tryToPerform( )
  75 /****** SignatureEngine/tryToPerform *****************************************
  76  *
  77  *   NAME
  78  *  tryToPerform -- tries to perform the signature operation.
  79  *
  80  *   FUNCTION
  81  *  if the situation is ready, perform following operations.
  82  *  1. prepares a signature template;
  83  *  2. calls the signature bridge component;
  84  *  3. clears up all used resources;
  85  *  4. notifies the result listener;
  86  *  5. sets the "accomplishment" flag.
  87  ******************************************************************************/
  88 {
  89     if (!checkReady())
  90         return;
  91
  92     rtl::Reference<XMLSignatureTemplateImpl> xSignatureTemplate = new XMLSignatureTemplateImpl();
  93
  94     css::uno::Reference< css::xml::wrapper::XXMLElementWrapper >
  95         xXMLElement = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
  96
  97     xSignatureTemplate->setTemplate(xXMLElement);
  98
  99     for( const auto i : m_vReferenceIds )
 100     {
 101         xXMLElement = m_xSAXEventKeeper->getElement( i );
 102         xSignatureTemplate->setTarget(xXMLElement);
 103     }
 104
 105     /*
 106      * set the Uri binding
 107      */
 108     xSignatureTemplate->setBinding( this );
 109
 110     startEngine(xSignatureTemplate);
 111
 112     /*
 113      * done
 114      */
 115     clearUp( );
 116
 117     notifyResultListener();
 118
 119     m_bMissionDone = true;
 120 }
 121
 122 void SignatureEngine::clearUp( ) const
 123 /****** SignatureEngine/clearUp **********************************************
 124  *
 125  *   NAME
 126  *  clearUp -- clear up all resources used by this operation.
 127  *
 128  *   FUNCTION
 129  *  cleaning resources up includes:
 130  *  1. releases the ElementCollector for the signature template element;
 131  *  2. releases ElementCollectors for referenced elements;
 132  *  3. releases the ElementCollector for the key element, if there is one.
 133  ******************************************************************************/
 134 {
 135     css::uno::Reference < css::xml::crypto::sax::XReferenceResolvedBroadcaster >
 136         xReferenceResolvedBroadcaster( m_xSAXEventKeeper, css::uno::UNO_QUERY );
 137     xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 138         m_nIdOfTemplateEC,
 139         static_cast<const css::uno::Reference < css::xml::crypto::sax::XReferenceResolvedListener > >(static_cast<SecurityEngine *>(const_cast<SignatureEngine *>(this))));
 140
 141     m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
 142
 143     for( const auto& i : m_vReferenceIds )
 144     {
 145         xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
 146             i,
 147             static_cast<const css::uno::Reference < css::xml::crypto::sax::XReferenceResolvedListener > >(static_cast<SecurityEngine *>(const_cast<SignatureEngine *>(this))));
 148         m_xSAXEventKeeper->removeElementCollector(i);
 149     }
 150
 151     if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
 152     {
 153         m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
 154     }
 155 }
 156
 157 /* XReferenceCollector */
 158 void SAL_CALL SignatureEngine::setReferenceCount( sal_Int32 count )
 159 {
 160     m_nTotalReferenceNumber = count;
 161     tryToPerform();
 162 }
 163
 164 void SAL_CALL SignatureEngine::setReferenceId( sal_Int32 id )
 165 {
 166     m_vReferenceIds.push_back( id );
 167 }
 168
 169 /* XUriBinding */
 170 void SAL_CALL SignatureEngine::setUriBinding(
 171     const OUString& uri,
 172     const css::uno::Reference< css::io::XInputStream >& aInputStream )
 173 {
 174     m_vUris.push_back(uri);
 175     m_vXInputStreams.push_back(aInputStream);
 176 }
 177
 178 css::uno::Reference< css::io::XInputStream > SAL_CALL SignatureEngine::getUriBinding( const OUString& uri )
 179 {
 180     css::uno::Reference< css::io::XInputStream > xInputStream;
 181
 182     int size = m_vUris.size();
 183
 184     for( int i=0; i<size; ++i)
 185     {
 186         if (m_vUris[i] == uri)
 187         {
 188             xInputStream = m_vXInputStreams[i];
 189             break;
 190         }
 191     }
 192
 193     return xInputStream;
 194 }
 195
 196
 197 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */