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
|
<?php
namespace Zotlabs\Module;
use App;
use Zotlabs\Web\Controller;
use Zotlabs\Web\HTTPSig;
use Zotlabs\Lib\Libzot;
use Zotlabs\Lib\SConfig;
class Magic extends Controller {
function init() {
logger('mod_magic: invoked', LOGGER_DEBUG);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$data = $_POST;
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET') {
$data = $_GET;
} else {
http_status_exit(405, 'Method Not Allowed');
}
logger('request method: ' . print_r($_SERVER['REQUEST_METHOD'], true), LOGGER_DATA);
logger('args: ' . print_r($data, true), LOGGER_DATA);
$bdest = $data['bdest'] ?? '';
$owa = $data['owa'] ?? 0;
$delegate = $data['delegate'] ?? '';
// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
if (!$bdest) {
http_status_exit(400, 'Bad Request');
}
$dest = hex2bin($bdest);
$parsed = parse_url($dest);
if (!$parsed) {
http_status_exit(400, 'Bad Request');
}
$basepath = unparse_url(array_filter(
$parsed,
fn (string $key) => in_array($key, ['scheme', 'host', 'port']),
ARRAY_FILTER_USE_KEY
));
$owapath = SConfig::get($basepath, 'system', 'openwebauth', $basepath . '/owa');
// This is ready-made for a plugin that provides a blacklist or "ask me" before blindly authenticating.
// By default, we'll proceed without asking.
$arr = [
'channel_id' => local_channel(),
'destination' => $dest,
'proceed' => true
];
call_hooks('magic_auth',$arr);
$dest = $arr['destination'];
if (!$arr['proceed']) {
goaway($dest);
}
if (get_observer_hash() && str_starts_with($dest, z_root())) {
// We are already authenticated on this site and a registered observer.
// First check if this is a delegate request on the local system and process accordingly.
// Otherwise redirect.
if ($delegate) {
$r = q("select * from channel left join hubloc on channel_hash = hubloc_hash where hubloc_addr = '%s' limit 1",
dbesc($delegate)
);
if ($r) {
$c = array_shift($r);
if (perm_is_allowed($c['channel_id'],get_observer_hash(),'delegate')) {
$tmp = $_SESSION;
$_SESSION['delegate_push'] = $tmp;
$_SESSION['delegate_channel'] = $c['channel_id'];
$_SESSION['delegate'] = get_observer_hash();
$_SESSION['account_id'] = intval($c['channel_account_id']);
change_channel($c['channel_id']);
}
}
}
goaway($dest);
}
if (local_channel()) {
$channel = App::get_channel();
// OpenWebAuth
if ($owa) {
$dest = strip_zids($dest);
$dest = strip_query_param($dest,'f');
// We now post to the OWA endpoint. This improves security by providing a signed digest
$data = json_encode([ 'OpenWebAuth' => random_string() ]);
$headers = [];
$headers['Accept'] = 'application/x-zot+json' ;
$headers['Content-Type'] = 'application/x-zot+json' ;
$headers['X-Open-Web-Auth'] = random_string();
$headers['Host'] = $parsed['host'];
$headers['(request-target)'] = 'get /owa';
$headers = HTTPSig::create_sig($headers,$channel['channel_prvkey'], channel_url($channel),true,'sha512');
$redirects = 0;
$x = z_fetch_url($owapath, false, $redirects, ['headers' => $headers]);
logger('owa fetch returned: ' . print_r($x,true),LOGGER_DATA);
if ($x['success']) {
$j = json_decode($x['body'],true);
if ($j['success'] && $j['encrypted_token']) {
// decrypt the token using our private key
$token = '';
openssl_private_decrypt(base64url_decode($j['encrypted_token']), $token, $channel['channel_prvkey']);
$x = strpbrk($dest,'?&');
// redirect using the encrypted token which will be exchanged for an authenticated session
$args = (($x) ? '&owt=' . $token : '?owt=' . $token) . (($delegate) ? '&delegate=1' : '');
goaway($dest . $args);
}
}
}
}
killme();
}
}
|
