|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* @copyright Copyright (c) 2016 Lukas Reschke <[email protected]> |
|
4
|
|
|
* |
|
5
|
|
|
* @license GNU AGPL version 3 or any later version |
|
6
|
|
|
* |
|
7
|
|
|
* This program is free software: you can redistribute it and/or modify |
|
8
|
|
|
* it under the terms of the GNU Affero General Public License as |
|
9
|
|
|
* published by the Free Software Foundation, either version 3 of the |
|
10
|
|
|
* License, or (at your option) any later version. |
|
11
|
|
|
* |
|
12
|
|
|
* This program is distributed in the hope that it will be useful, |
|
13
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
14
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
15
|
|
|
* GNU Affero General Public License for more details. |
|
16
|
|
|
* |
|
17
|
|
|
* You should have received a copy of the GNU Affero General Public License |
|
18
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
19
|
|
|
* |
|
20
|
|
|
*/ |
|
21
|
|
|
|
|
22
|
|
|
namespace OC\Security\IdentityProof; |
|
23
|
|
|
|
|
24
|
|
|
use OCP\AppFramework\Utility\ITimeFactory; |
|
25
|
|
|
use OCP\IURLGenerator; |
|
26
|
|
|
use OCP\IUser; |
|
27
|
|
|
use OCP\IUserManager; |
|
28
|
|
|
|
|
29
|
|
|
class Signer { |
|
30
|
|
|
/** @var Manager */ |
|
31
|
|
|
private $keyManager; |
|
32
|
|
|
/** @var ITimeFactory */ |
|
33
|
|
|
private $timeFactory; |
|
34
|
|
|
/** @var IURLGenerator */ |
|
35
|
|
|
private $urlGenerator; |
|
36
|
|
|
/** @var IUserManager */ |
|
37
|
|
|
private $userManager; |
|
38
|
|
|
|
|
39
|
|
|
/** |
|
40
|
|
|
* @param Manager $keyManager |
|
41
|
|
|
* @param ITimeFactory $timeFactory |
|
42
|
|
|
* @param IURLGenerator $urlGenerator |
|
43
|
|
|
* @param IUserManager $userManager |
|
44
|
|
|
*/ |
|
45
|
|
|
public function __construct(Manager $keyManager, |
|
46
|
|
|
ITimeFactory $timeFactory, |
|
47
|
|
|
IURLGenerator $urlGenerator, |
|
|
|
|
|
|
48
|
|
|
IUserManager $userManager) { |
|
49
|
|
|
$this->keyManager = $keyManager; |
|
50
|
|
|
$this->timeFactory = $timeFactory; |
|
51
|
|
|
$this->userManager = $userManager; |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
|
|
/** |
|
55
|
|
|
* Returns a signed blob for $data |
|
56
|
|
|
* |
|
57
|
|
|
* @param string $type |
|
58
|
|
|
* @param array $data |
|
59
|
|
|
* @param IUser $user |
|
60
|
|
|
* @return array ['message', 'signature'] |
|
61
|
|
|
*/ |
|
62
|
|
|
public function sign($type, array $data, IUser $user) { |
|
63
|
|
|
$privateKey = $this->keyManager->getKey($user)->getPrivate(); |
|
64
|
|
|
$data = [ |
|
65
|
|
|
'data' => $data, |
|
66
|
|
|
'type' => $type, |
|
67
|
|
|
'signer' => $user->getCloudId(), |
|
68
|
|
|
'timestamp' => $this->timeFactory->getTime(), |
|
69
|
|
|
]; |
|
70
|
|
|
openssl_sign(json_encode($data), $signature, $privateKey, OPENSSL_ALGO_SHA512); |
|
71
|
|
|
|
|
72
|
|
|
return [ |
|
73
|
|
|
'message' => $data, |
|
74
|
|
|
'signature' => base64_encode($signature), |
|
75
|
|
|
]; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
/** |
|
79
|
|
|
* @param string $url |
|
80
|
|
|
* @return string |
|
81
|
|
|
*/ |
|
82
|
|
|
private function removeProtocolFromUrl($url) { |
|
83
|
|
|
if (strpos($url, 'https://') === 0) { |
|
84
|
|
|
return substr($url, strlen('https://')); |
|
85
|
|
|
} else if (strpos($url, 'http://') === 0) { |
|
86
|
|
|
return substr($url, strlen('http://')); |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
return $url; |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
/** |
|
93
|
|
|
* Whether the data is signed properly |
|
94
|
|
|
* |
|
95
|
|
|
* @param array $data |
|
96
|
|
|
* @return bool |
|
97
|
|
|
*/ |
|
98
|
|
|
public function verify(array $data) { |
|
99
|
|
|
if(isset($data['message']) |
|
100
|
|
|
&& isset($data['signature']) |
|
101
|
|
|
&& isset($data['message']['signer']) |
|
102
|
|
|
) { |
|
103
|
|
|
$server = $this->urlGenerator->getAbsoluteURL('/'); |
|
104
|
|
|
$postfix = strlen('@' . rtrim($this->removeProtocolFromUrl($server), '/')); |
|
105
|
|
|
$userId = substr($data['message']['signer'], -$postfix); |
|
106
|
|
|
|
|
107
|
|
|
$user = $this->userManager->get($userId); |
|
108
|
|
|
if($user !== null) { |
|
109
|
|
|
$key = $this->keyManager->getKey($user); |
|
110
|
|
|
return (bool)openssl_verify( |
|
111
|
|
|
json_encode($data['message']), |
|
112
|
|
|
base64_decode($data['signature']), |
|
113
|
|
|
$key->getPublic() |
|
114
|
|
|
); |
|
115
|
|
|
} |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
|
|
return false; |
|
119
|
|
|
} |
|
120
|
|
|
} |
|
121
|
|
|
|
nextcloud /
server
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.