1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svl/restrictedpaths.hxx>
#include <algorithm>
#include <osl/process.h>
#include <tools/urlobj.hxx>
#include <unotools/localfilehelper.hxx>
#include <unotools/syslocale.hxx>
namespace svt
{
namespace
{
// ----------------------------------------------------------------
/** retrieves the value of an environment variable
@return <TRUE/> if and only if the retrieved string value is not empty
*/
bool lcl_getEnvironmentValue( const sal_Char* _pAsciiEnvName, OUString& _rValue )
{
_rValue = OUString();
OUString sEnvName = OUString::createFromAscii( _pAsciiEnvName );
osl_getEnvironment( sEnvName.pData, &_rValue.pData );
return !_rValue.isEmpty();
}
//-----------------------------------------------------------------
void lcl_convertStringListToUrls( const OUString& _rColonSeparatedList, ::std::vector< OUString >& _rTokens )
{
const sal_Unicode cSeparator =
#if defined(WNT)
';'
#else
':'
#endif
;
sal_Int32 nIndex = 0;
do
{
// the current token in the list
OUString sCurrentToken = _rColonSeparatedList.getToken( 0, cSeparator, nIndex );
if ( !sCurrentToken.isEmpty() )
{
INetURLObject aCurrentURL;
OUString sURL;
if ( ::utl::LocalFileHelper::ConvertPhysicalNameToURL( sCurrentToken, sURL ) )
aCurrentURL = INetURLObject( sURL );
else
{
// smart URL parsing, assuming FILE protocol
aCurrentURL = INetURLObject( sCurrentToken, INET_PROT_FILE );
}
aCurrentURL.setFinalSlash( );
_rTokens.push_back( aCurrentURL.GetMainURL( INetURLObject::NO_DECODE ) );
}
}
while ( nIndex >= 0 );
}
}
//=====================================================================
//= CheckURLAllowed
//=====================================================================
struct CheckURLAllowed
{
protected:
#ifdef WNT
SvtSysLocale m_aSysLocale;
#endif
OUString m_sCheckURL; // the URL to check
bool m_bAllowParent;
public:
inline CheckURLAllowed( const OUString& _rCheckURL, bool bAllowParent = true )
:m_sCheckURL( _rCheckURL ), m_bAllowParent( bAllowParent )
{
#ifdef WNT
// on windows, assume that the relevant file systems are case insensitive,
// thus normalize the URL
m_sCheckURL = m_aSysLocale.GetCharClass().lowercase( m_sCheckURL, 0, m_sCheckURL.Len() );
#endif
}
bool operator()( const OUString& _rApprovedURL )
{
#ifdef WNT
// on windows, assume that the relevant file systems are case insensitive,
// thus normalize the URL
OUString sApprovedURL( m_aSysLocale.GetCharClass().lowercase( _rApprovedURL, 0, _rApprovedURL.getLength() ) );
#else
OUString sApprovedURL( _rApprovedURL );
#endif
sal_Int32 nLenApproved = sApprovedURL.getLength();
sal_Int32 nLenChecked = m_sCheckURL.getLength();
if ( nLenApproved > nLenChecked )
{
if ( m_bAllowParent )
{
if ( sApprovedURL.indexOf( m_sCheckURL ) == 0 )
{
if ( ( m_sCheckURL[ nLenChecked - 1 ] == '/' )
|| ( sApprovedURL[ nLenChecked ] == '/' ) )
return true;
}
}
else
{
// just a difference in final slash?
if ( ( nLenApproved == ( nLenChecked + 1 ) ) &&
( sApprovedURL[ nLenApproved - 1 ] == '/' ) )
return true;
}
return false;
}
else if ( nLenApproved < nLenChecked )
{
if ( m_sCheckURL.indexOf( sApprovedURL ) == 0 )
{
if ( ( sApprovedURL[ nLenApproved - 1 ] == '/' )
|| ( m_sCheckURL[ nLenApproved ] == '/' ) )
return true;
}
return false;
}
else
{
// strings have equal length
return ( sApprovedURL == m_sCheckURL );
}
}
};
//=====================================================================
//= RestrictedPaths
//=====================================================================
//---------------------------------------------------------------------
RestrictedPaths::RestrictedPaths()
:m_bFilterIsEnabled( true )
{
OUString sRestrictedPathList;
if ( lcl_getEnvironmentValue( "RestrictedPath", sRestrictedPathList ) )
// append a final slash. This ensures that when we later on check
// for unrestricted paths, we don't allow paths like "/home/user35" just because
// "/home/user3" is allowed - with the final slash, we make it "/home/user3/".
lcl_convertStringListToUrls( sRestrictedPathList, m_aUnrestrictedURLs );
}
RestrictedPaths::~RestrictedPaths() {}
// --------------------------------------------------------------------
bool RestrictedPaths::isUrlAllowed( const OUString& _rURL ) const
{
if ( m_aUnrestrictedURLs.empty() || !m_bFilterIsEnabled )
return true;
::std::vector< OUString >::const_iterator aApprovedURL = ::std::find_if(
m_aUnrestrictedURLs.begin(),
m_aUnrestrictedURLs.end(),
CheckURLAllowed( _rURL, true )
);
return ( aApprovedURL != m_aUnrestrictedURLs.end() );
}
// --------------------------------------------------------------------
bool RestrictedPaths::isUrlAllowed( const OUString& _rURL, bool allowParents ) const
{
if ( m_aUnrestrictedURLs.empty() || !m_bFilterIsEnabled )
return true;
::std::vector< OUString >::const_iterator aApprovedURL = ::std::find_if(
m_aUnrestrictedURLs.begin(),
m_aUnrestrictedURLs.end(),
CheckURLAllowed( _rURL, allowParents )
);
return ( aApprovedURL != m_aUnrestrictedURLs.end() );
}
} // namespace svt
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
