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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
<?php
/**
* ownCloud
*
* @author Sam Tuke
* @copyright 2012 Sam Tuke samtuke@owncloud.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/>.
*
*/
namespace OCA\Encryption;
/**
* Class for handling encryption related session data
*/
class Session {
private $view;
const NOT_INITIALIZED = '0';
const INIT_EXECUTED = '1';
const INIT_SUCCESSFUL = '2';
/**
* @brief if session is started, check if ownCloud key pair is set up, if not create it
* @param \OC_FilesystemView $view
*
* @note The ownCloud key pair is used to allow public link sharing even if encryption is enabled
*/
public function __construct($view) {
$this->view = $view;
if (!$this->view->is_dir('owncloud_private_key')) {
$this->view->mkdir('owncloud_private_key');
}
$publicShareKeyId = \OC_Appconfig::getValue('files_encryption', 'publicShareKeyId');
if ($publicShareKeyId === null) {
$publicShareKeyId = 'pubShare_' . substr(md5(time()), 0, 8);
\OC_Appconfig::setValue('files_encryption', 'publicShareKeyId', $publicShareKeyId);
}
if (
!$this->view->file_exists("/public-keys/" . $publicShareKeyId . ".public.key")
|| !$this->view->file_exists("/owncloud_private_key/" . $publicShareKeyId . ".private.key")
) {
$keypair = Crypt::createKeypair();
// Disable encryption proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
// Save public key
if (!$view->is_dir('/public-keys')) {
$view->mkdir('/public-keys');
}
$this->view->file_put_contents('/public-keys/' . $publicShareKeyId . '.public.key', $keypair['publicKey']);
// Encrypt private key empty passphrase
$encryptedPrivateKey = Crypt::symmetricEncryptFileContent($keypair['privateKey'], '');
// Save private key
$this->view->file_put_contents(
'/owncloud_private_key/' . $publicShareKeyId . '.private.key', $encryptedPrivateKey);
\OC_FileProxy::$enabled = $proxyStatus;
}
if (\OCA\Encryption\Helper::isPublicAccess()) {
// Disable encryption proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$encryptedKey = $this->view->file_get_contents(
'/owncloud_private_key/' . $publicShareKeyId . '.private.key');
$privateKey = Crypt::decryptPrivateKey($encryptedKey, '');
$this->setPublicSharePrivateKey($privateKey);
\OC_FileProxy::$enabled = $proxyStatus;
}
}
/**
* @brief Sets user private key to session
* @param string $privateKey
* @return bool
*
* @note this should only be set on login
*/
public function setPrivateKey($privateKey) {
\OC::$session->set('privateKey', $privateKey);
return true;
}
/**
* @brief Sets status of encryption app
* @param string $init INIT_SUCCESSFUL, INIT_EXECUTED, NOT_INOITIALIZED
* @return bool
*
* @note this doesn not indicate of the init was successful, we just remeber the try!
*/
public function setInitialized($init) {
\OC::$session->set('encryptionInitialized', $init);
return true;
}
/**
* @brief Gets status if we already tried to initialize the encryption app
* @returns init status INIT_SUCCESSFUL, INIT_EXECUTED, NOT_INOITIALIZED
*
* @note this doesn not indicate of the init was successful, we just remeber the try!
*/
public function getInitialized() {
if (!is_null(\OC::$session->get('encryptionInitialized'))) {
return \OC::$session->get('encryptionInitialized');
} else {
return self::NOT_INITIALIZED;
}
}
/**
* @brief Gets user or public share private key from session
* @returns string $privateKey The user's plaintext private key
*
*/
public function getPrivateKey() {
// return the public share private key if this is a public access
if (\OCA\Encryption\Helper::isPublicAccess()) {
return $this->getPublicSharePrivateKey();
} else {
if (!is_null(\OC::$session->get('privateKey'))) {
return \OC::$session->get('privateKey');
} else {
return false;
}
}
}
/**
* @brief Sets public user private key to session
* @param string $privateKey
* @return bool
*/
public function setPublicSharePrivateKey($privateKey) {
\OC::$session->set('publicSharePrivateKey', $privateKey);
return true;
}
/**
* @brief Gets public share private key from session
* @returns string $privateKey
*
*/
public function getPublicSharePrivateKey() {
if (!is_null(\OC::$session->get('publicSharePrivateKey'))) {
return \OC::$session->get('publicSharePrivateKey');
} else {
return false;
}
}
/**
* @brief Sets user legacy key to session
* @param $legacyKey
* @return bool
*/
public function setLegacyKey($legacyKey) {
\OC::$session->set('legacyKey', $legacyKey);
return true;
}
/**
* @brief Gets user legacy key from session
* @returns string $legacyKey The user's plaintext legacy key
*
*/
public function getLegacyKey() {
if (!is_null(\OC::$session->get('legacyKey'))) {
return \OC::$session->get('legacyKey');
} else {
return false;
}
}
}
|
