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
|
<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016 Lukas Reschke <lukas@statuscode.ch>
*
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Security\IdentityProof;
use OC\Files\AppData\Factory;
use OCP\Files\IAppData;
use OCP\IConfig;
use OCP\IUser;
use OCP\Security\ICrypto;
use Psr\Log\LoggerInterface;
class Manager {
private IAppData $appData;
public function __construct(
Factory $appDataFactory,
private ICrypto $crypto,
private IConfig $config,
private LoggerInterface $logger,
) {
$this->appData = $appDataFactory->get('identityproof');
}
/**
* Calls the openssl functions to generate a public and private key.
* In a separate function for unit testing purposes.
*
* @return array [$publicKey, $privateKey]
* @throws \RuntimeException
*/
protected function generateKeyPair(): array {
$config = [
'digest_alg' => 'sha512',
'private_key_bits' => 2048,
];
// Generate new key
$res = openssl_pkey_new($config);
if ($res === false) {
$this->logOpensslError();
throw new \RuntimeException('OpenSSL reported a problem');
}
if (openssl_pkey_export($res, $privateKey, null, $config) === false) {
$this->logOpensslError();
throw new \RuntimeException('OpenSSL reported a problem');
}
// Extract the public key from $res to $pubKey
$publicKey = openssl_pkey_get_details($res);
$publicKey = $publicKey['key'];
return [$publicKey, $privateKey];
}
/**
* Generate a key for a given ID
* Note: If a key already exists it will be overwritten
*
* @param string $id key id
* @throws \RuntimeException
*/
protected function generateKey(string $id): Key {
[$publicKey, $privateKey] = $this->generateKeyPair();
// Write the private and public key to the disk
try {
$this->appData->newFolder($id);
} catch (\Exception $e) {
}
$folder = $this->appData->getFolder($id);
$folder->newFile('private')
->putContent($this->crypto->encrypt($privateKey));
$folder->newFile('public')
->putContent($publicKey);
return new Key($publicKey, $privateKey);
}
/**
* Get key for a specific id
*
* @throws \RuntimeException
*/
protected function retrieveKey(string $id): Key {
try {
$folder = $this->appData->getFolder($id);
$privateKey = $this->crypto->decrypt(
$folder->getFile('private')->getContent()
);
$publicKey = $folder->getFile('public')->getContent();
return new Key($publicKey, $privateKey);
} catch (\Exception $e) {
return $this->generateKey($id);
}
}
/**
* Get public and private key for $user
*
* @throws \RuntimeException
*/
public function getKey(IUser $user): Key {
$uid = $user->getUID();
return $this->retrieveKey('user-' . $uid);
}
/**
* Get instance wide public and private key
*
* @throws \RuntimeException
*/
public function getSystemKey(): Key {
$instanceId = $this->config->getSystemValue('instanceid', null);
if ($instanceId === null) {
throw new \RuntimeException('no instance id!');
}
return $this->retrieveKey('system-' . $instanceId);
}
private function logOpensslError(): void {
$errors = [];
while ($error = openssl_error_string()) {
$errors[] = $error;
}
$this->logger->critical('Something is wrong with your openssl setup: ' . implode(', ', $errors));
}
}
|
