mirror of
https://github.com/Yubico/yubikey-ksm.git
synced 2024-12-05 00:24:19 +01:00
110 lines
3.5 KiB
PHP
110 lines
3.5 KiB
PHP
<?php
|
|
|
|
# Written by Simon Josefsson <simon@josefsson.org>.
|
|
# Copyright (c) 2009 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.
|
|
|
|
include 'ykksm-config.php';
|
|
include 'ykksm-utils.php';
|
|
|
|
openlog("ykksm", LOG_PID, $logfacility)
|
|
or die("ERR Syslog open error\n");
|
|
|
|
$otp = $_REQUEST["otp"];
|
|
if (!$otp) {
|
|
syslog(LOG_INFO, "No OTP provided");
|
|
die("ERR No OTP provided\n");
|
|
}
|
|
|
|
if (!preg_match("/^([cbdefghijklnrtuv]{0,16})([cbdefghijklnrtuv]{32})$/",
|
|
$otp, $matches)) {
|
|
syslog(LOG_INFO, "Invalid OTP format: $otp");
|
|
die("ERR Invalid OTP format\n");
|
|
}
|
|
$id = $matches[1];
|
|
$modhex_ciphertext = $matches[2];
|
|
|
|
$dbconn = mysql_connect($dbhost, $dbuser, $dbpasswd);
|
|
if (!$dbconn) {
|
|
syslog(LOG_ERR, "Database connect error: " . mysql_error());
|
|
die("ERR Database error\n");
|
|
}
|
|
$db_selected = mysql_select_db($dbname);
|
|
if (!$db_selected) {
|
|
syslog(LOG_ERR, "Database select error: " . mysql_error());
|
|
die("ERR Database error\n");
|
|
}
|
|
|
|
$sql = "SELECT aesKey, internalName FROM yubikeys " .
|
|
"WHERE publicName = '$id' AND active";
|
|
$result = mysql_query($sql);
|
|
if (!$result) {
|
|
syslog(LOG_ERR, "Database query error: " . mysql_error());
|
|
die("ERR Database error\n");
|
|
}
|
|
|
|
if (mysql_num_rows($result) != 1) {
|
|
syslog(LOG_INFO, "Unknown yubikey: " . $otp);
|
|
die("ERR Unknown yubikey\n");
|
|
}
|
|
|
|
$row = mysql_fetch_assoc($result);
|
|
$aesKey = $row['aesKey'];
|
|
$internalName = $row['internalName'];
|
|
|
|
$ciphertext = modhex2hex($modhex_ciphertext);
|
|
$plaintext = aes128ecb_decrypt($aesKey, $ciphertext);
|
|
|
|
$uid = substr($plaintext, 0, 12);
|
|
if (strcmp($uid, $internalName) != 0) {
|
|
syslog(LOG_ERR, "UID error: $otp $plaintext: $uid vs $internalName");
|
|
die("ERR Corrupt OTP\n");;
|
|
}
|
|
|
|
if (!crc_is_good($plaintext)) {
|
|
syslog(LOG_ERR, "CRC error: $otp: $plaintext");
|
|
die("ERR Corrupt OTP\n");
|
|
}
|
|
|
|
# Mask out interesting fields
|
|
$counter = substr($plaintext, 14, 2) . substr($plaintext, 12, 2);
|
|
$low = substr($plaintext, 18, 2) . substr($plaintext, 16, 2);
|
|
$high = substr($plaintext, 20, 2);
|
|
$use = substr($plaintext, 22, 2);
|
|
|
|
$out = "OK counter=$counter low=$low high=$high use=$use";
|
|
|
|
syslog(LOG_INFO, "SUCCESS OTP $otp PT $plaintext $out")
|
|
or die("ERR Log error\n");
|
|
|
|
print "$out\n";
|
|
|
|
mysql_close()
|
|
or syslog(LOG_ERR, "Database close error (otp $otp): " . mysql_error());
|
|
|
|
?>
|