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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 "encryptionengine.hxx"
22 : #include <com/sun/star/xml/crypto/XMLEncryptionTemplate.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 cssxc = com::sun::star::xml::crypto;
28 : namespace cssxw = com::sun::star::xml::wrapper;
29 :
30 0 : EncryptionEngine::EncryptionEngine( const Reference<XComponentContext> & xContext)
31 0 : :m_xContext(xContext), m_nIdOfBlocker(-1)
32 : {
33 0 : }
34 :
35 0 : bool EncryptionEngine::checkReady() const
36 : /****** EncryptionEngine/checkReady ******************************************
37 : *
38 : * NAME
39 : * checkReady -- checks the conditions for the main operation.
40 : *
41 : * SYNOPSIS
42 : * bReady = checkReady( );
43 : *
44 : * FUNCTION
45 : * checks whether all following conditions are satisfied:
46 : * 1. the main operation has't begun yet;
47 : * 2. the key material is known;
48 : * 3. the id of the template blocker is known;
49 : * 4. both the key element and the encryption template
50 : * are bufferred.
51 : *
52 : * INPUTS
53 : * empty
54 : *
55 : * RESULT
56 : * bReady - true if all conditions are satisfied, false otherwise
57 : *
58 : * AUTHOR
59 : * Michael Mi
60 : * Email: michael.mi@sun.com
61 : ******************************************************************************/
62 : {
63 0 : bool rc = true;
64 :
65 0 : sal_Int32 nKeyInc = 0;
66 0 : if (m_nIdOfKeyEC != 0)
67 : {
68 0 : nKeyInc = 1;
69 : }
70 :
71 0 : if (m_bMissionDone ||
72 0 : m_nIdOfKeyEC == -1 ||
73 0 : m_nIdOfBlocker == -1 ||
74 0 : 1+nKeyInc > m_nNumOfResolvedReferences )
75 : {
76 0 : rc = false;
77 : }
78 :
79 0 : return rc;
80 : }
81 :
82 0 : void EncryptionEngine::tryToPerform( )
83 : throw (Exception, RuntimeException)
84 : /****** EncryptionEngine/tryToPerform ****************************************
85 : *
86 : * NAME
87 : * tryToPerform -- tries to perform the encryption/decryption operation.
88 : *
89 : * SYNOPSIS
90 : * tryToPerform( );
91 : *
92 : * FUNCTION
93 : * if the situation is ready, perform following operations.
94 : * 1. prepares a encryption template;
95 : * 2. calls the encryption bridge component;
96 : * 3. clears up all used resources;
97 : * 4. notifies the result listener;
98 : * 5. sets the "accomplishment" flag.
99 : *
100 : * INPUTS
101 : * empty
102 : *
103 : * RESULT
104 : * empty
105 : *
106 : * AUTHOR
107 : * Michael Mi
108 : * Email: michael.mi@sun.com
109 : ******************************************************************************/
110 : {
111 0 : if (checkReady())
112 : {
113 : Reference < cssxc::XXMLEncryptionTemplate > xEncryptionTemplate =
114 0 : cssxc::XMLEncryptionTemplate::create( m_xContext );
115 :
116 : Reference< cssxw::XXMLElementWrapper > xXMLElement
117 0 : = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
118 :
119 0 : xEncryptionTemplate->setTemplate(xXMLElement);
120 :
121 0 : startEngine( xEncryptionTemplate );
122 :
123 : /*
124 : * done
125 : */
126 0 : clearUp( );
127 :
128 0 : notifyResultListener();
129 :
130 0 : m_bMissionDone = true;
131 : }
132 0 : }
133 :
134 0 : void EncryptionEngine::clearUp( ) const
135 : /****** EncryptionEngine/clearup *********************************************
136 : *
137 : * NAME
138 : * clearUp -- clear up all resources used by this operation.
139 : *
140 : * SYNOPSIS
141 : * clearUp( );
142 : *
143 : * FUNCTION
144 : * cleaning resources up includes:
145 : * 1. releases the ElementCollector for the encryption template element;
146 : * 2. releases the Blocker for the encryption template element;
147 : * 3. releases the ElementCollector for the key element, if there is one.
148 : *
149 : * INPUTS
150 : * empty
151 : *
152 : * RESULT
153 : * empty
154 : *
155 : * AUTHOR
156 : * Michael Mi
157 : * Email: michael.mi@sun.com
158 : ******************************************************************************/
159 : {
160 : Reference < cssxc::sax::XReferenceResolvedBroadcaster >
161 0 : xReferenceResolvedBroadcaster( m_xSAXEventKeeper, UNO_QUERY );
162 :
163 0 : xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
164 : m_nIdOfTemplateEC,
165 0 : (const Reference < cssxc::sax::XReferenceResolvedListener >)((SecurityEngine *)this));
166 :
167 0 : m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
168 :
169 0 : if (m_nIdOfBlocker != -1)
170 : {
171 0 : m_xSAXEventKeeper->removeBlocker(m_nIdOfBlocker);
172 : }
173 :
174 0 : if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
175 : {
176 0 : m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
177 0 : }
178 0 : }
179 :
180 : /* XBlockerMonitor */
181 0 : void SAL_CALL EncryptionEngine::setBlockerId( sal_Int32 id )
182 : throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException, std::exception)
183 : {
184 0 : m_nIdOfBlocker = id;
185 0 : tryToPerform();
186 0 : }
187 :
188 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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