1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_xmlsecurity.hxx"
26
27 #include "encryptionengine.hxx"
28 #include <com/sun/star/xml/crypto/XXMLEncryptionTemplate.hpp>
29 #include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
30 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
31
32 namespace cssu = com::sun::star::uno;
33 namespace cssl = com::sun::star::lang;
34 namespace cssxc = com::sun::star::xml::crypto;
35 namespace cssxw = com::sun::star::xml::wrapper;
36
37 #define ENCRYPTION_TEMPLATE "com.sun.star.xml.crypto.XMLEncryptionTemplate"
38
39 #define DECLARE_ASCII( SASCIIVALUE ) \
40 rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( SASCIIVALUE ) )
41
EncryptionEngine()42 EncryptionEngine::EncryptionEngine( )
43 :m_nIdOfBlocker(-1)
44 {
45 }
46
checkReady() const47 bool EncryptionEngine::checkReady() const
48 /****** EncryptionEngine/checkReady ******************************************
49 *
50 * NAME
51 * checkReady -- checks the conditions for the main operation.
52 *
53 * SYNOPSIS
54 * bReady = checkReady( );
55 *
56 * FUNCTION
57 * checks whether all following conditions are satisfied:
58 * 1. the main operation has't begun yet;
59 * 2. the key material is known;
60 * 3. the id of the template blocker is known;
61 * 4. both the key element and the encryption template
62 * are bufferred.
63 *
64 * INPUTS
65 * empty
66 *
67 * RESULT
68 * bReady - true if all conditions are satisfied, false otherwise
69 *
70 * HISTORY
71 * 05.01.2004 - implemented
72 *
73 * AUTHOR
74 * Michael Mi
75 * Email: michael.mi@sun.com
76 ******************************************************************************/
77 {
78 bool rc = true;
79
80 sal_Int32 nKeyInc = 0;
81 if (m_nIdOfKeyEC != 0)
82 {
83 nKeyInc = 1;
84 }
85
86 if (m_bMissionDone ||
87 m_nIdOfKeyEC == -1 ||
88 m_nIdOfBlocker == -1 ||
89 1+nKeyInc > m_nNumOfResolvedReferences )
90 {
91 rc = false;
92 }
93
94 return rc;
95 }
96
tryToPerform()97 void EncryptionEngine::tryToPerform( )
98 throw (cssu::Exception, cssu::RuntimeException)
99 /****** EncryptionEngine/tryToPerform ****************************************
100 *
101 * NAME
102 * tryToPerform -- tries to perform the encryption/decryption operation.
103 *
104 * SYNOPSIS
105 * tryToPerform( );
106 *
107 * FUNCTION
108 * if the situation is ready, perform following operations.
109 * 1. prepares a encryption template;
110 * 2. calls the encryption bridge component;
111 * 3. clears up all used resources;
112 * 4. notifies the result listener;
113 * 5. sets the "accomplishment" flag.
114 *
115 * INPUTS
116 * empty
117 *
118 * RESULT
119 * empty
120 *
121 * HISTORY
122 * 05.01.2004 - implemented
123 *
124 * AUTHOR
125 * Michael Mi
126 * Email: michael.mi@sun.com
127 ******************************************************************************/
128 {
129 if (checkReady())
130 {
131 const rtl::OUString sEncryptionTemplate (
132 RTL_CONSTASCII_USTRINGPARAM( ENCRYPTION_TEMPLATE ) );
133 cssu::Reference < cssxc::XXMLEncryptionTemplate > xEncryptionTemplate(
134 mxMSF->createInstance( sEncryptionTemplate ), cssu::UNO_QUERY );
135
136 OSL_ASSERT( xEncryptionTemplate.is() );
137
138 cssu::Reference< cssxw::XXMLElementWrapper > xXMLElement
139 = m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
140
141 xEncryptionTemplate->setTemplate(xXMLElement);
142
143 startEngine( xEncryptionTemplate );
144
145 /*
146 * done
147 */
148 clearUp( );
149
150 notifyResultListener();
151
152 m_bMissionDone = true;
153 }
154 }
155
clearUp() const156 void EncryptionEngine::clearUp( ) const
157 /****** EncryptionEngine/clearup *********************************************
158 *
159 * NAME
160 * clearUp -- clear up all resources used by this operation.
161 *
162 * SYNOPSIS
163 * clearUp( );
164 *
165 * FUNCTION
166 * cleaning resources up includes:
167 * 1. releases the ElementCollector for the encryption template element;
168 * 2. releases the Blocker for the encryption template element;
169 * 3. releases the ElementCollector for the key element, if there is one.
170 *
171 * INPUTS
172 * empty
173 *
174 * RESULT
175 * empty
176 *
177 * HISTORY
178 * 05.01.2004 - implemented
179 *
180 * AUTHOR
181 * Michael Mi
182 * Email: michael.mi@sun.com
183 ******************************************************************************/
184 {
185 cssu::Reference < cssxc::sax::XReferenceResolvedBroadcaster >
186 xReferenceResolvedBroadcaster( m_xSAXEventKeeper, cssu::UNO_QUERY );
187
188 xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
189 m_nIdOfTemplateEC,
190 (const cssu::Reference < cssxc::sax::XReferenceResolvedListener >)((SecurityEngine *)this));
191
192 m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
193
194 if (m_nIdOfBlocker != -1)
195 {
196 m_xSAXEventKeeper->removeBlocker(m_nIdOfBlocker);
197 }
198
199 if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
200 {
201 m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
202 }
203 }
204
205 /* XBlockerMonitor */
setBlockerId(sal_Int32 id)206 void SAL_CALL EncryptionEngine::setBlockerId( sal_Int32 id )
207 throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException)
208 {
209 m_nIdOfBlocker = id;
210 tryToPerform();
211 }
212
213