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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 : /*
22 : * Implementation of the I/O interfaces based on stream and URI binding
23 : */
24 : #include "xmlstreamio.hxx"
25 : #include <rtl/ustring.hxx>
26 : #include "rtl/uri.hxx"
27 :
28 : #include <libxml/uri.h>
29 : #include <sal/types.h>
30 : //For reasons that escape me, this is what xmlsec does when size_t is not 4
31 : #if SAL_TYPES_SIZEOFPOINTER != 4
32 : # define XMLSEC_NO_SIZE_T
33 : #endif
34 : #include <xmlsec/io.h>
35 :
36 : #define XMLSTREAMIO_INITIALIZED 0x01
37 : #define XMLSTREAMIO_REGISTERED 0x02
38 :
39 : /* Global variables */
40 : /*-
41 : * Enable stream I/O or not.
42 : */
43 : static char enableXmlStreamIO = 0x00 ;
44 :
45 2 : ::com::sun::star::uno::Reference< ::com::sun::star::xml::crypto::XUriBinding > m_xUriBinding ;
46 :
47 : extern "C"
48 0 : int xmlStreamMatch( const char* uri )
49 : {
50 0 : ::com::sun::star::uno::Reference< com::sun::star::io::XInputStream > xInputStream ;
51 :
52 0 : if( ( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) &&
53 : ( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
54 0 : if( uri == NULL || !m_xUriBinding.is() )
55 0 : return 0 ;
56 : //XMLSec first unescapes the uri and calls this function. For example, we pass the Uri
57 : //ObjectReplacements/Object%201 then XMLSec passes ObjectReplacements/Object 1
58 : //first. If this failed it would try this
59 : //again with the original escaped string. However, it does not get this far, because there
60 : //is another callback registered by libxml which claims to be able to handle this uri.
61 : ::rtl::OUString sUri =
62 : ::rtl::Uri::encode( ::rtl::OUString::createFromAscii( uri ),
63 0 : rtl_UriCharClassUric, rtl_UriEncodeKeepEscapes, RTL_TEXTENCODING_UTF8);
64 0 : xInputStream = m_xUriBinding->getUriBinding( sUri ) ;
65 0 : if (!xInputStream.is())
66 : {
67 : //Try the the passed in uri directly.
68 : //For old documents prior OOo 3.0. We did not use URIs then.
69 0 : xInputStream = m_xUriBinding->getUriBinding(
70 0 : ::rtl::OUString::createFromAscii(uri));
71 0 : }
72 : }
73 0 : if (xInputStream.is())
74 0 : return 1;
75 : else
76 0 : return 0 ;
77 : }
78 :
79 : extern "C"
80 0 : void* xmlStreamOpen( const char* uri )
81 : {
82 0 : ::com::sun::star::uno::Reference< com::sun::star::io::XInputStream > xInputStream ;
83 : ::com::sun::star::io::XInputStream* pInputStream ;
84 :
85 0 : if( ( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) &&
86 : ( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
87 0 : if( uri == NULL || !m_xUriBinding.is() )
88 0 : return NULL ;
89 :
90 : //see xmlStreamMatch
91 : ::rtl::OUString sUri =
92 : ::rtl::Uri::encode( ::rtl::OUString::createFromAscii( uri ),
93 0 : rtl_UriCharClassUric, rtl_UriEncodeKeepEscapes, RTL_TEXTENCODING_UTF8);
94 0 : xInputStream = m_xUriBinding->getUriBinding( sUri ) ;
95 0 : if (!xInputStream.is())
96 : {
97 : //For old documents.
98 : //try the the passed in uri directly.
99 0 : xInputStream = m_xUriBinding->getUriBinding(
100 0 : ::rtl::OUString::createFromAscii(uri));
101 : }
102 :
103 0 : if( xInputStream.is() ) {
104 0 : pInputStream = xInputStream.get() ;
105 0 : pInputStream->acquire() ;
106 0 : return ( void* )pInputStream ;
107 0 : }
108 : }
109 :
110 0 : return NULL ;
111 : }
112 :
113 : extern "C"
114 0 : int xmlStreamRead( void* context, char* buffer, int len )
115 : {
116 : int numbers ;
117 0 : ::com::sun::star::uno::Reference< com::sun::star::io::XInputStream > xInputStream ;
118 0 : ::com::sun::star::uno::Sequence< sal_Int8 > outSeqs( len ) ;
119 :
120 0 : numbers = 0 ;
121 0 : if( ( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) &&
122 : ( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
123 0 : if( context != NULL ) {
124 0 : xInputStream = ( com::sun::star::io::XInputStream* )context ;
125 0 : if( !xInputStream.is() )
126 0 : return 0 ;
127 :
128 0 : numbers = xInputStream->readBytes( outSeqs, len ) ;
129 0 : const sal_Int8* readBytes = ( const sal_Int8* )outSeqs.getArray() ;
130 0 : for( int i = 0 ; i < numbers ; i ++ )
131 0 : *( buffer + i ) = *( readBytes + i ) ;
132 : }
133 : }
134 :
135 0 : return numbers ;
136 : }
137 :
138 : extern "C"
139 0 : int xmlStreamClose( void * context )
140 : {
141 : ::com::sun::star::io::XInputStream* pInputStream ;
142 :
143 0 : if( ( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) &&
144 : ( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
145 0 : if( context != NULL ) {
146 0 : pInputStream = ( ::com::sun::star::io::XInputStream* )context ;
147 0 : pInputStream->release() ;
148 : }
149 : }
150 :
151 0 : return 0 ;
152 : }
153 :
154 0 : int xmlEnableStreamInputCallbacks()
155 : {
156 :
157 0 : if( !( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) ) {
158 : //Register the callbacks into xmlSec
159 : //In order to make the xmlsec io finding the callbacks firstly,
160 : //I put the callbacks at the very begining.
161 :
162 : //Cleanup the older callbacks.
163 : //Notes: all none default callbacks will lose.
164 0 : xmlSecIOCleanupCallbacks() ;
165 :
166 : //Register my classbacks.
167 : int cbs = xmlSecIORegisterCallbacks(
168 : xmlStreamMatch,
169 : xmlStreamOpen,
170 : xmlStreamRead,
171 0 : xmlStreamClose ) ;
172 0 : if( cbs < 0 ) {
173 0 : return -1 ;
174 : }
175 :
176 : //Register the default callbacks.
177 : //Notes: the error will cause xmlsec working problems.
178 0 : cbs = xmlSecIORegisterDefaultCallbacks() ;
179 0 : if( cbs < 0 ) {
180 0 : return -1 ;
181 : }
182 :
183 0 : enableXmlStreamIO |= XMLSTREAMIO_INITIALIZED ;
184 : }
185 :
186 0 : return 0 ;
187 : }
188 :
189 0 : int xmlRegisterStreamInputCallbacks(
190 : ::com::sun::star::uno::Reference< ::com::sun::star::xml::crypto::XUriBinding >& aUriBinding
191 : ) {
192 0 : if( !( enableXmlStreamIO & XMLSTREAMIO_INITIALIZED ) ) {
193 0 : if( xmlEnableStreamInputCallbacks() < 0 )
194 0 : return -1 ;
195 : }
196 :
197 0 : if( !( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
198 0 : enableXmlStreamIO |= XMLSTREAMIO_REGISTERED ;
199 : }
200 :
201 0 : m_xUriBinding = aUriBinding ;
202 :
203 0 : return 0 ;
204 : }
205 :
206 0 : int xmlUnregisterStreamInputCallbacks( void )
207 : {
208 0 : if( ( enableXmlStreamIO & XMLSTREAMIO_REGISTERED ) ) {
209 : //Clear the uir-stream binding
210 0 : m_xUriBinding.clear() ;
211 :
212 : //disable the registered flag
213 0 : enableXmlStreamIO &= ~XMLSTREAMIO_REGISTERED ;
214 : }
215 :
216 0 : return 0 ;
217 : }
218 :
219 0 : void xmlDisableStreamInputCallbacks() {
220 0 : xmlUnregisterStreamInputCallbacks() ;
221 0 : enableXmlStreamIO &= ~XMLSTREAMIO_INITIALIZED ;
222 6 : }
223 :
224 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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