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
|
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\Files_Sharing\Middleware;
use OCA\Files_Sharing\Controller\ExternalSharesController;
use OCA\Files_Sharing\Controller\ShareController;
use OCP\App\IAppManager;
use OCP\AppFramework\Http\NotFoundResponse;
use OCP\AppFramework\Middleware;
use OCP\Files\NotFoundException;
use OCP\IConfig;
use OCP\AppFramework\Utility\IControllerMethodReflector;
use OCA\Files_Sharing\Exceptions\S2SException;
use OCP\AppFramework\Http\JSONResponse;
use OCP\IRequest;
use OCP\Share\IManager;
/**
* Checks whether the "sharing check" is enabled
*
* @package OCA\Files_Sharing\Middleware
*/
class SharingCheckMiddleware extends Middleware {
/** @var string */
protected $appName;
/** @var IConfig */
protected $config;
/** @var IAppManager */
protected $appManager;
/** @var IControllerMethodReflector */
protected $reflector;
/** @var IManager */
protected $shareManager;
/** @var IRequest */
protected $request;
/***
* @param string $appName
* @param IConfig $config
* @param IAppManager $appManager
* @param IControllerMethodReflector $reflector
* @param IManager $shareManager
* @param IRequest $request
*/
public function __construct($appName,
IConfig $config,
IAppManager $appManager,
IControllerMethodReflector $reflector,
IManager $shareManager,
IRequest $request
) {
$this->appName = $appName;
$this->config = $config;
$this->appManager = $appManager;
$this->reflector = $reflector;
$this->shareManager = $shareManager;
$this->request = $request;
}
/**
* Check if sharing is enabled before the controllers is executed
*
* @param \OCP\AppFramework\Controller $controller
* @param string $methodName
* @throws NotFoundException
* @throws S2SException
*/
public function beforeController($controller, $methodName) {
if(!$this->isSharingEnabled()) {
throw new NotFoundException('Sharing is disabled.');
}
if ($controller instanceof ExternalSharesController &&
!$this->externalSharesChecks()) {
throw new S2SException('Federated sharing not allowed');
} else if ($controller instanceof ShareController) {
$token = $this->request->getParam('token');
$share = $this->shareManager->getShareByToken($token);
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK
&& !$this->isLinkSharingEnabled()) {
throw new NotFoundException('Link sharing is disabled');
}
}
}
/**
* Return 404 page in case of a not found exception
*
* @param \OCP\AppFramework\Controller $controller
* @param string $methodName
* @param \Exception $exception
* @return NotFoundResponse
* @throws \Exception
*/
public function afterException($controller, $methodName, \Exception $exception) {
if(is_a($exception, '\OCP\Files\NotFoundException')) {
return new NotFoundResponse();
}
if (is_a($exception, '\OCA\Files_Sharing\Exceptions\S2SException')) {
return new JSONResponse($exception->getMessage(), 405);
}
throw $exception;
}
/**
* Checks for externalshares controller
* @return bool
*/
private function externalSharesChecks() {
if (!$this->reflector->hasAnnotation('NoIncomingFederatedSharingRequired') &&
$this->config->getAppValue('files_sharing', 'incoming_server2server_share_enabled', 'yes') !== 'yes') {
return false;
}
if (!$this->reflector->hasAnnotation('NoOutgoingFederatedSharingRequired') &&
$this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') !== 'yes') {
return false;
}
return true;
}
/**
* Check whether sharing is enabled
* @return bool
*/
private function isSharingEnabled() {
// FIXME: This check is done here since the route is globally defined and not inside the files_sharing app
// Check whether the sharing application is enabled
if(!$this->appManager->isEnabledForUser($this->appName)) {
return false;
}
return true;
}
/**
* Check if link sharing is allowed
* @return bool
*/
private function isLinkSharingEnabled() {
// Check if the shareAPI is enabled
if ($this->config->getAppValue('core', 'shareapi_enabled', 'yes') !== 'yes') {
return false;
}
// Check whether public sharing is enabled
if($this->config->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
return false;
}
return true;
}
}
|