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
<?php
/**
* Copyright (c) 2014 Yubico AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* This is a simple example using PDO and a sqlite database for storing
* registrations. It supports multiple registrations associated with each user.
*/
require_once('../../src/u2flib_server/U2F.php');
$dbfile = '/var/tmp/u2f-pdo.sqlite';
$pdo = new PDO("sqlite:$dbfile");
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
$pdo->exec("create table if not exists users (id integer primary key, name varchar(255))");
$pdo->exec("create table if not exists registrations (id integer primary key, user_id integer, keyHandle varchar(255), publicKey varchar(255), certificate text, counter integer)");
$scheme = isset($_SERVER['HTTPS']) ? "https://" : "http://";
$u2f = new u2flib_server\U2F($scheme . $_SERVER['HTTP_HOST']);
session_start();
function createAndGetUser($name) {
global $pdo;
$sel = $pdo->prepare("select * from users where name = ?");
$sel->execute(array($name));
$user = $sel->fetch();
if(!$user) {
$ins = $pdo->prepare("insert into users (name) values(?)");
$ins->execute(array($name));
$sel->execute(array($name));
$user = $sel->fetch();
}
return $user;
}
function getRegs($user_id) {
global $pdo;
$sel = $pdo->prepare("select * from registrations where user_id = ?");
$sel->execute(array($user_id));
return $sel->fetchAll();
}
function addReg($user_id, $reg) {
global $pdo;
$ins = $pdo->prepare("insert into registrations (user_id, keyHandle, publicKey, certificate, counter) values (?, ?, ?, ?, ?)");
$ins->execute(array($user_id, $reg->keyHandle, $reg->publicKey, $reg->certificate, $reg->counter));
}
function updateReg($reg) {
global $pdo;
$upd = $pdo->prepare("update registrations set counter = ? where id = ?");
$upd->execute(array($reg->counter, $reg->id));
}
?>
<html>
<head>
<title>PHP U2F example</title>
<script src="../assets/u2f-api.js"></script>
<script>
<?php
if($_SERVER['REQUEST_METHOD'] === 'POST') {
if(!$_POST['username']) {
echo "alert('no username provided!');";
} else if(!isset($_POST['action']) && !isset($_POST['register2']) && !isset($_POST['authenticate2'])) {
echo "alert('no action provided!');";
} else {
$user = createAndGetUser($_POST['username']);
if(isset($_POST['action'])) {
switch($_POST['action']):
case 'register':
try {
$data = $u2f->getRegisterData(getRegs($user->id));
list($req,$sigs) = $data;
$_SESSION['regReq'] = json_encode($req);
echo "var req = " . json_encode($req) . ";";
echo "var sigs = " . json_encode($sigs) . ";";
echo "var username = '" . $user->name . "';";
?>
setTimeout(function() {
console.log("Register: ", req);
u2f.register([req], sigs, function(data) {
var form = document.getElementById('form');
var reg = document.getElementById('register2');
var user = document.getElementById('username');
console.log("Register callback", data);
if(data.errorCode && errorCode != 0) {
alert("registration failed with errror: " + data.errorCode);
return;
}
reg.value = JSON.stringify(data);
user.value = username;
form.submit();
});
}, 1000);
<?php
} catch( Exception $e ) {
echo "alert('error: " . $e->getMessage() . "');";
}
break;
case 'authenticate':
try {
$reqs = json_encode($u2f->getAuthenticateData(getRegs($user->id)));
$_SESSION['authReq'] = $reqs;
echo "var req = $reqs;";
echo "var username = '" . $user->name . "';";
?>
setTimeout(function() {
console.log("sign: ", req);
u2f.sign(req, function(data) {
var form = document.getElementById('form');
var auth = document.getElementById('authenticate2');
var user = document.getElementById('username');
console.log("Authenticate callback", data);
auth.value=JSON.stringify(data);
user.value = username;
form.submit();
});
}, 1000);
<?php
} catch( Exception $e ) {
echo "alert('error: " . $e->getMessage() . "');";
}
break;
endswitch;
} else if($_POST['register2']) {
try {
$reg = $u2f->doRegister(json_decode($_SESSION['regReq']), json_decode($_POST['register2']));
addReg($user->id, $reg);
} catch( Exception $e ) {
echo "alert('error: " . $e->getMessage() . "');";
} finally {
$_SESSION['regReq'] = null;
}
} else if($_POST['authenticate2']) {
try {
$reg = $u2f->doAuthenticate(json_decode($_SESSION['authReq']), getRegs($user->id), json_decode($_POST['authenticate2']));
updateReg($reg);
echo "alert('success: " . $reg->counter . "');";
} catch( Exception $e ) {
echo "alert('error: " . $e->getMessage() . "');";
} finally {
$_SESSION['authReq'] = null;
}
}
}
}
?>
</script>
</head>
<body>
<form method="POST" id="form">
username: <input name="username" id="username"/><br/>
register: <input value="register" name="action" type="radio"/><br/>
authenticate: <input value="authenticate" name="action" type="radio"/><br/>
<input type="hidden" name="register2" id="register2"/>
<input type="hidden" name="authenticate2" id="authenticate2"/>
<button type="submit">Submit!</button>
</form>
</body>
</html>