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<?php
/**
* ownCloud
*
* @author Robin Appelman
* @copyright 2011 Robin Appelman icewind1991@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* transparent encryption
*/
class OC_FileProxy_Encryption extends OC_FileProxy{
public function preFile_put_contents($path,&$data){
if(substr($path,-4)=='.enc'){
OC_Log::write('files_encryption','file put contents',OC_Log::DEBUG);
if (is_resource($data)) {
$newData='';
while(!feof($data)){
$block=fread($data,8192);
$newData.=OC_Crypt::encrypt($block);
}
$data=$newData;
}else{
$data=OC_Crypt::blockEncrypt($data);
}
}
}
public function postFile_get_contents($path,$data){
if(substr($path,-4)=='.enc'){
OC_Log::write('files_encryption','file get contents',OC_Log::DEBUG);
return OC_Crypt::blockDecrypt($data);
}
}
public function postFopen($path,&$result){
if(substr($path,-4)=='.enc'){
OC_Log::write('files_encryption','fopen',OC_Log::DEBUG);
fclose($result);
$result=fopen('crypt://'.substr($path,0,-4));//remove the .enc extention so we don't catch the fopen request made by cryptstream
}
}
public function preReadFile($path){
if(substr($path,-4)=='.enc'){
OC_Log::write('files_encryption','readline',OC_Log::DEBUG);
$stream=fopen('crypt://'.substr($path,0,-4));
while(!feof($stream)){
print(fread($stream,8192));
}
return false;//cancel the original request
}
}
}
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