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oott123/hotp.php

Last active Oct 13, 2020
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<?php
//配置部分
$password = '这里是验证的密码';
$authkeypair = array(
'帐号标题' => 'Secret key',
'帐号标题2' => 'key2',
);
?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>===Google 二次验证网页版===</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body{
font-family:"Consolas";
font-size:12pt;
color:#333;
width:220px;
}
.row{
clear:both;
border-bottom:#ccc solid 1px;
}
.left{
text-align:left;
}
.right{
text-align:right;
font-size:18pt;
color:#4286BE;
}
.cell{
padding:5px;
}
.row:hover{
background:#eee;
}
form{
padding:0;
margin:0;
}
input{
background:#fff;
border:dashed 1px #ccc;
font-size:18pt;
font-family:"Consolas";
}
input:hover{
background:#FAFAFA;
}
#time{
height:2px;
background:#6cf;
}
</style>
</head>
<body>
<?php
//include_once('authclass.php');
if(!isset($_REQUEST['key']) || $_REQUEST['key']!=$password){
die('<form method="POST"><input type="password" name="key" /><input type="submit" value="Go" /></form>');
}
$refresh = '<form method="POST" id="rf"><input type="hidden" name="key" value="'.$password.'" /><input type="submit" value="Refresh" id="t"/></form>';
echo '
<div class="row">
<div class="left cell">TOTP On Web</div>
<div id="time"></div>
<div class="right cell" style="display:none">'.$refresh.'</div>
</div>';
foreach ($authkeypair as $k => $p){
echo '<div class="row">';
$TimeStamp = Google2FA::get_timestamp();
$secretkey = Google2FA::base32_decode($p);
$otp = Google2FA::oath_hotp($secretkey, $TimeStamp);
echo '<div class="left cell">'.$k.'</div><div class="right cell">'.$otp.'</div></div>';
}
?>
<script>
var time = <?=($TimeStamp+1)*30-time();?>;
function refresh(){
time--;
//document.getElementById('t').value='Refresh('+time+')';
document.getElementById('time').style.width=(time/30)*100+'%';
if(time<=0){
document.getElementById('rf').submit();
}
}
intd = setInterval('refresh()',1000);
</script>
</body>
<?php
/**
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* PHP Google two-factor authentication module.
*
* See http://www.idontplaydarts.com/2011/07/google-totp-two-factor-authentication-for-php/
* for more details
*
* @author Phil
**/
class Google2FA {
const keyRegeneration = 30; // Interval between key regeneration
const otpLength = 6; // Length of the Token generated
private static $lut = array( // Lookup needed for Base32 encoding
"A" => 0, "B" => 1,
"C" => 2, "D" => 3,
"E" => 4, "F" => 5,
"G" => 6, "H" => 7,
"I" => 8, "J" => 9,
"K" => 10, "L" => 11,
"M" => 12, "N" => 13,
"O" => 14, "P" => 15,
"Q" => 16, "R" => 17,
"S" => 18, "T" => 19,
"U" => 20, "V" => 21,
"W" => 22, "X" => 23,
"Y" => 24, "Z" => 25,
"2" => 26, "3" => 27,
"4" => 28, "5" => 29,
"6" => 30, "7" => 31
);
/**
* Generates a 16 digit secret key in base32 format
* @return string
**/
public static function generate_secret_key($length = 16) {
$b32 = "234567QWERTYUIOPASDFGHJKLZXCVBNM";
$s = "";
for ($i = 0; $i < $length; $i++)
$s .= $b32[rand(0,31)];
return $s;
}
/**
* Returns the current Unix Timestamp devided by the keyRegeneration
* period.
* @return integer
**/
public static function get_timestamp() {
return floor(microtime(true)/self::keyRegeneration);
}
/**
* Decodes a base32 string into a binary string.
**/
public static function base32_decode($b32) {
$b32 = strtoupper($b32);
if (!preg_match('/^[ABCDEFGHIJKLMNOPQRSTUVWXYZ234567]+$/', $b32, $match))
throw new Exception('Invalid characters in the base32 string.');
$l = strlen($b32);
$n = 0;
$j = 0;
$binary = "";
for ($i = 0; $i < $l; $i++) {
$n = $n << 5; // Move buffer left by 5 to make room
$n = $n + self::$lut[$b32[$i]]; // Add value into buffer
$j = $j + 5; // Keep track of number of bits in buffer
if ($j >= 8) {
$j = $j - 8;
$binary .= chr(($n & (0xFF << $j)) >> $j);
}
}
return $binary;
}
/**
* Takes the secret key and the timestamp and returns the one time
* password.
*
* @param binary $key - Secret key in binary form.
* @param integer $counter - Timestamp as returned by get_timestamp.
* @return string
**/
public static function oath_hotp($key, $counter)
{
if (strlen($key) < 8)
throw new Exception('Secret key is too short. Must be at least 16 base 32 characters');
$bin_counter = pack('N*', 0) . pack('N*', $counter); // Counter must be 64-bit int
$hash = hash_hmac ('sha1', $bin_counter, $key, true);
return str_pad(self::oath_truncate($hash), self::otpLength, '0', STR_PAD_LEFT);
}
/**
* Verifys a user inputted key against the current timestamp. Checks $window
* keys either side of the timestamp.
*
* @param string $b32seed
* @param string $key - User specified key
* @param integer $window
* @param boolean $useTimeStamp
* @return boolean
**/
public static function verify_key($b32seed, $key, $window = 4, $useTimeStamp = true) {
$timeStamp = self::get_timestamp();
if ($useTimeStamp !== true) $timeStamp = (int)$useTimeStamp;
$binarySeed = self::base32_decode($b32seed);
for ($ts = $timeStamp - $window; $ts <= $timeStamp + $window; $ts++)
if (self::oath_hotp($binarySeed, $ts) == $key)
return true;
return false;
}
/**
* Extracts the OTP from the SHA1 hash.
* @param binary $hash
* @return integer
**/
public static function oath_truncate($hash)
{
$offset = ord($hash[19]) & 0xf;
return (
((ord($hash[$offset+0]) & 0x7f) << 24 ) |
((ord($hash[$offset+1]) & 0xff) << 16 ) |
((ord($hash[$offset+2]) & 0xff) << 8 ) |
(ord($hash[$offset+3]) & 0xff)
) % pow(10, self::otpLength);
}
}
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