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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#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, ::rtl::OUString& _rValue )
{
_rValue = ::rtl::OUString();
::rtl::OUString sEnvName = ::rtl::OUString::createFromAscii( _pAsciiEnvName );
osl_getEnvironment( sEnvName.pData, &_rValue.pData );
return _rValue.getLength() != 0;
}
//-----------------------------------------------------------------
void lcl_convertStringListToUrls( const rtl::OUString& _rColonSeparatedList, ::std::vector< String >& _rTokens )
{
const sal_Unicode cSeparator =
#if defined(WNT)
';'
#else
':'
#endif
;
sal_Int32 nIndex = 0;
do
{
// the current token in the list
rtl::OUString sCurrentToken = _rColonSeparatedList.getToken( 0, cSeparator, nIndex );
if ( !sCurrentToken.isEmpty() )
{
INetURLObject aCurrentURL;
rtl::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
String m_sCheckURL; // the URL to check
bool m_bAllowParent;
public:
inline CheckURLAllowed( const String& _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 String& _rApprovedURL )
{
#ifdef WNT
// on windows, assume that the relevant file systems are case insensitive,
// thus normalize the URL
String sApprovedURL( m_aSysLocale.GetCharClass().lowercase( _rApprovedURL, 0, _rApprovedURL.Len() ) );
#else
String sApprovedURL( _rApprovedURL );
#endif
xub_StrLen nLenApproved = sApprovedURL.Len();
xub_StrLen nLenChecked = m_sCheckURL.Len();
if ( nLenApproved > nLenChecked )
{
if ( m_bAllowParent )
{
if ( sApprovedURL.Search( m_sCheckURL ) == 0 )
{
if ( ( m_sCheckURL.GetChar( nLenChecked - 1 ) == '/' )
|| ( sApprovedURL.GetChar( nLenChecked ) == '/' ) )
return true;
}
}
else
{
// just a difference in final slash?
if ( ( nLenApproved == ( nLenChecked + 1 ) ) &&
( sApprovedURL.GetChar( nLenApproved - 1 ) == '/' ) )
return true;
}
return false;
}
else if ( nLenApproved < nLenChecked )
{
if ( m_sCheckURL.Search( sApprovedURL ) == 0 )
{
if ( ( sApprovedURL.GetChar( nLenApproved - 1 ) == '/' )
|| ( m_sCheckURL.GetChar( nLenApproved ) == '/' ) )
return true;
}
return false;
}
else
{
// strings have equal length
return ( sApprovedURL == m_sCheckURL );
}
}
};
//=====================================================================
//= RestrictedPaths
//=====================================================================
//---------------------------------------------------------------------
RestrictedPaths::RestrictedPaths()
:m_bFilterIsEnabled( true )
{
::rtl::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 String& _rURL ) const
{
if ( m_aUnrestrictedURLs.empty() || !m_bFilterIsEnabled )
return true;
::std::vector< String >::const_iterator aApprovedURL = ::std::find_if(
m_aUnrestrictedURLs.begin(),
m_aUnrestrictedURLs.end(),
CheckURLAllowed( _rURL, true )
);
return ( aApprovedURL != m_aUnrestrictedURLs.end() );
}
// --------------------------------------------------------------------
bool RestrictedPaths::isUrlAllowed( const String& _rURL, bool allowParents ) const
{
if ( m_aUnrestrictedURLs.empty() || !m_bFilterIsEnabled )
return true;
::std::vector< String >::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: */
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