71 lines
2 KiB
PHP
71 lines
2 KiB
PHP
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<?php
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/**
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* ownCloud
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*
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* @author Robin Appelman
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* @copyright 2011 Robin Appelman icewind1991@gmail.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* transparent encryption
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*/
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class OC_FileProxy_Encryption extends OC_FileProxy{
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public function preFile_put_contents($path,&$data){
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if(substr($path,-4)=='.enc'){
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OC_Log::write('files_encryption','file put contents',OC_Log::DEBUG);
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if (is_resource($data)) {
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$newData='';
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while(!feof($data)){
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$block=fread($data,8192);
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$newData.=OC_Crypt::encrypt($block);
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}
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$data=$newData;
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}else{
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$data=OC_Crypt::blockEncrypt($data);
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}
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}
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}
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public function postFile_get_contents($path,$data){
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if(substr($path,-4)=='.enc'){
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OC_Log::write('files_encryption','file get contents',OC_Log::DEBUG);
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return OC_Crypt::blockDecrypt($data);
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}
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}
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public function postFopen($path,&$result){
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if(substr($path,-4)=='.enc'){
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OC_Log::write('files_encryption','fopen',OC_Log::DEBUG);
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fclose($result);
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$result=fopen('crypt://'.substr($path,0,-4));//remove the .enc extention so we don't catch the fopen request made by cryptstream
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}
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}
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public function preReadFile($path){
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if(substr($path,-4)=='.enc'){
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OC_Log::write('files_encryption','readline',OC_Log::DEBUG);
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$stream=fopen('crypt://'.substr($path,0,-4));
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while(!feof($stream)){
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print(fread($stream,8192));
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}
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return false;//cancel the original request
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}
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}
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}
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