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
228
229
230
231
232
|
<?php
require('config.php');
$params = explode("/", $_SERVER["PATH_INFO"], 3);
$realm = $params[1];
$cmd = $params[2];
$method = $_SERVER["REQUEST_METHOD"];
unset($user);
unset($rowid);
$db = new PDO($osu_db);
if (!$db) {
error_log("EST: Could not access database");
die("Could not access database");
}
if (!empty($_SERVER['PHP_AUTH_DIGEST'])) {
$needed = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1,
'uri'=>1, 'response'=>1);
$data = array();
$keys = implode('|', array_keys($needed));
preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@',
$_SERVER['PHP_AUTH_DIGEST'], $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? $m[3] : $m[4];
unset($needed[$m[1]]);
}
if ($needed) {
error_log("EST: Missing auth parameter");
die('Authentication failed');
}
$user = $data['username'];
if (strlen($user) < 1) {
error_log("EST: Empty username");
die('Authentication failed');
}
$sql = "SELECT rowid,password,operation FROM sessions " .
"WHERE user='$user' AND realm='$realm'";
$q = $db->query($sql);
if (!$q) {
error_log("EST: Session not found for user=$user realm=$realm");
die("Session not found");
}
$row = $q->fetch();
if (!$row) {
error_log("EST: Session fetch failed for user=$user realm=$realm");
die('Session not found');
}
$rowid = $row['rowid'];
$oper = $row['operation'];
if ($oper != '5') {
error_log("EST: Unexpected operation $oper for user=$user realm=$realm");
die("Session not found");
}
$pw = $row['password'];
if (strlen($pw) < 1) {
error_log("EST: Empty password for user=$user realm=$realm");
die('Authentication failed');
}
$A1 = md5($user . ':' . $realm . ':' . $pw);
$A2 = md5($method . ':' . $data['uri']);
$resp = md5($A1 . ':' . $data['nonce'] . ':' . $data['nc'] . ':' .
$data['cnonce'] . ':' . $data['qop'] . ':' . $A2);
if ($data['response'] != $resp) {
error_log("EST: Incorrect authentication response for user=$user realm=$realm");
die('Authentication failed');
}
} else if (isset($_SERVER["SSL_CLIENT_VERIFY"]) &&
$_SERVER["SSL_CLIENT_VERIFY"] == "SUCCESS" &&
isset($_SERVER["SSL_CLIENT_M_SERIAL"])) {
$user = "cert-" . $_SERVER["SSL_CLIENT_M_SERIAL"];
$sql = "SELECT rowid,password,operation FROM sessions " .
"WHERE user='$user' AND realm='$realm'";
$q = $db->query($sql);
if (!$q) {
error_log("EST: Session not found for user=$user realm=$realm");
die("Session not found");
}
$row = $q->fetch();
if (!$row) {
error_log("EST: Session fetch failed for user=$user realm=$realm");
die('Session not found');
}
$rowid = $row['rowid'];
$oper = $row['operation'];
if ($oper != '10') {
error_log("EST: Unexpected operation $oper for user=$user realm=$realm");
die("Session not found");
}
}
if ($method == "GET" && $cmd == "cacerts") {
$fname = "$osu_root/est/$realm-cacerts.pkcs7";
if (!file_exists($fname)) {
error_log("EST: cacerts - unknown realm $realm");
die("Unknown realm");
}
header("Content-Transfer-Encoding: base64");
header("Content-Type: application/pkcs7-mime");
$data = file_get_contents($fname);
echo wordwrap(base64_encode($data), 72, "\n", true);
echo "\n";
error_log("EST: cacerts");
} else if ($method == "GET" && $cmd == "csrattrs") {
header("Content-Transfer-Encoding: base64");
header("Content-Type: application/csrattrs");
readfile("$osu_root/est/est-attrs.b64");
error_log("EST: csrattrs");
} else if ($method == "POST" &&
($cmd == "simpleenroll" || $cmd == "simplereenroll")) {
$reenroll = $cmd == "simplereenroll";
if (!$reenroll && (!isset($user) || strlen($user) == 0)) {
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Digest realm="'.$realm.
'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
error_log("EST: simpleenroll - require authentication");
die('Authentication required');
}
if ($reenroll &&
(!isset($user) ||
!isset($_SERVER["SSL_CLIENT_VERIFY"]) ||
$_SERVER["SSL_CLIENT_VERIFY"] != "SUCCESS")) {
header('HTTP/1.1 403 Forbidden');
error_log("EST: simplereenroll - require certificate authentication");
die('Authentication required');
}
if (!isset($_SERVER["CONTENT_TYPE"])) {
error_log("EST: simpleenroll without Content-Type");
die("Missing Content-Type");
}
if (!stristr($_SERVER["CONTENT_TYPE"], "application/pkcs10")) {
error_log("EST: simpleenroll - unexpected Content-Type: " .
$_SERVER["CONTENT_TYPE"]);
die("Unexpected Content-Type");
}
$data = file_get_contents("php://input");
error_log("EST: simpleenroll - POST data from php://input: " . $data);
$req = base64_decode($data);
if ($req == FALSE) {
error_log("EST: simpleenroll - Invalid base64-encoded PKCS#10 data");
die("Invalid base64-encoded PKCS#10 data");
}
$cadir = "$osu_root/est";
$reqfile = "$cadir/tmp/cert-req.pkcs10";
$f = fopen($reqfile, "wb");
fwrite($f, $req);
fclose($f);
$req_pem = "$reqfile.pem";
if (file_exists($req_pem))
unlink($req_pem);
exec("openssl req -in $reqfile -inform DER -out $req_pem -outform PEM");
if (!file_exists($req_pem)) {
error_log("EST: simpleenroll - Failed to parse certificate request");
die("Failed to parse certificate request");
}
/* FIX: validate request and add HS 2.0 extensions to cert */
$cert_pem = "$cadir/tmp/req-signed.pem";
if (file_exists($cert_pem))
unlink($cert_pem);
exec("openssl x509 -req -in $req_pem -CAkey $cadir/cakey.pem -out $cert_pem -CA $cadir/cacert.pem -CAserial $cadir/serial -days 365 -text");
if (!file_exists($cert_pem)) {
error_log("EST: simpleenroll - Failed to sign certificate");
die("Failed to sign certificate");
}
$cert = file_get_contents($cert_pem);
$handle = popen("openssl x509 -in $cert_pem -serial -noout", "r");
$serial = fread($handle, 200);
pclose($handle);
$pattern = "/serial=(?P<snhex>[0-9a-fA-F:]*)/m";
preg_match($pattern, $serial, $matches);
if (!isset($matches['snhex']) || strlen($matches['snhex']) < 1) {
error_log("EST: simpleenroll - Could not get serial number");
die("Could not get serial number");
}
$sn = str_replace(":", "", strtoupper($matches['snhex']));
$user = "cert-$sn";
error_log("EST: user = $user");
$cert_der = "$cadir/tmp/req-signed.der";
if (file_exists($cert_der))
unlink($cert_der);
exec("openssl x509 -in $cert_pem -inform PEM -out $cert_der -outform DER");
if (!file_exists($cert_der)) {
error_log("EST: simpleenroll - Failed to convert certificate");
die("Failed to convert certificate");
}
$der = file_get_contents($cert_der);
$fingerprint = hash("sha256", $der);
error_log("EST: sha256(DER cert): $fingerprint");
$pkcs7 = "$cadir/tmp/est-client.pkcs7";
if (file_exists($pkcs7))
unlink($pkcs7);
exec("openssl crl2pkcs7 -nocrl -certfile $cert_pem -out $pkcs7 -outform DER");
if (!file_exists($pkcs7)) {
error_log("EST: simpleenroll - Failed to prepare PKCS#7 file");
die("Failed to prepare PKCS#7 file");
}
if (!$db->exec("UPDATE sessions SET user='$user', cert='$fingerprint', cert_pem='$cert' WHERE rowid=$rowid")) {
error_log("EST: simpleenroll - Failed to update session database");
die("Failed to update session database");
}
header("Content-Transfer-Encoding: base64");
header("Content-Type: application/pkcs7-mime");
$data = file_get_contents($pkcs7);
$resp = wordwrap(base64_encode($data), 72, "\n", true);
echo $resp . "\n";
error_log("EST: simpleenroll - PKCS#7 response: " . $resp);
} else {
header("HTTP/1.0 404 Not Found");
error_log("EST: Unexpected method or path");
die("Unexpected method or path");
}
?>
|
