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生成带logo的二维码-php集成动态口令认证,撸飞哥

放大字体  缩小字体 发布日期:2016-07-23  浏览次数:19
核心提示:这篇文章主要为大家详细介绍了php集成动态口令认证,《奇米影视777撸啊撸》/动态口令采用一次一密、用过密码作废的方式来提高安
这篇文章主要为大家详细介绍了php集成动态口令认证,奇米影视777撸啊撸/动态口令采用一次一密、用过密码作废的方式来提高安全性能,感兴趣的小伙伴们可以参考一下 大多数系统目前均使用的静态密码进行身份认证登录,但由于静态密码容易被窃取,其安全性无法满足安全要求。动态口令采用一次一密、用过密码作废的方式防止了密码被窃取带来的安全问题。 动态口令分为HOTP(基于事件计数的动态口令,RFC4226)、TOTP(基于时间计数的动态口令,RFC6238)、OCRA(挑战应答式动态口令,RFC6287)等方式。本文介绍了集成TOTP方式的动态口令认证的方案,PHP框架采用Thinkphp3.2.3,动态口令生成器使用的是google authtication。1、为Thinkphp框架添加oath算法类oath算法封装类oath.php代码如下:<?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 $binary; } /*by tang*/ public static function base32_encode($data, $length){ $basestr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"; $count = 0; if ($length > 0) { $buffer = $data[0]; $next = 1; $bitsLeft = 8; while (($bitsLeft > 0 || $next < $length)) { if ($bitsLeft < 5) { if ($next < $length) { $buffer <<= 8; $buffer |= $data[$next++] & 0xFF; $bitsLeft += 8; } else { $pad = 5 - $bitsLeft; $buffer <<= $pad; $bitsLeft += $pad; } } $index = 0x1F & ($buffer >> ($bitsLeft - 5)); $bitsLeft -= 5; $result .= $basestr[$index]; $count++; } } return $result; } /** * 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 = 5, $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); }}/*$InitalizationKey = "LFLFMU2SGVCUIUCZKBMEKRKLIQ"; // Set the inital key$TimeStamp = Google2FA::get_timestamp();$secretkey = Google2FA::base32_decode($InitalizationKey); // Decode it into binary$otp = Google2FA::oath_hotp($secretkey, $TimeStamp); // Get current tokenecho("Init key: $InitalizationKey\n");echo("Timestamp: $TimeStamp\n");echo("One time password: $otp\n");// Use this to verify a key as it allows for some time drift.$result = Google2FA::verify_key($InitalizationKey, "123456");var_dump($result);*/?>由于google的动态口令算法中种子密钥使用了base32编码,因此需要base32算法,base32.php内容如下:<?php//namespace Base32;/** * Base32 encoder and decoder * * Last update: 2012-06-20 * * RFC 4648 compliant * @link http://www.ietf.org/rfc/rfc4648.txt * * Some groundwork based on this class * https://github.com/NTICompass/PHP-Base32 * * @author Christian Riesen <chris.riesen@gmail.com> * @link http://christianriesen.com * @license MIT License see LICENSE file */class Base32{ /** * Alphabet for encoding and decoding base32 * * @var array */ private static $alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567='; /** * Creates an array from a binary string into a given chunk size * * @param string $binaryString String to chunk * @param integer $bits Number of bits per chunk * @return array */ private static function chunk($binaryString, $bits) { $binaryString = chunk_split($binaryString, $bits, ' '); if (substr($binaryString, (strlen($binaryString)) - 1) == ' ') { $binaryString = substr($binaryString, 0, strlen($binaryString)-1); } return explode(' ', $binaryString); } /** * Encodes into base32 * * @param string $string Clear text string * @return string Base32 encoded string */ public static function encode($string) { if (strlen($string) == 0) { // Gives an empty string return ''; } // Convert string to binary $binaryString = ''; foreach (str_split($string) as $s) { // Return each character as an 8-bit binary string $binaryString .= sprintf('%08b', ord($s)); } // Break into 5-bit chunks, then break that into an array $binaryArray = self::chunk($binaryString, 5); // Pad array to be divisible by 8 while (count($binaryArray) % 8 !== 0) { $binaryArray[] = null; } $base32String = ''; // Encode in base32 foreach ($binaryArray as $bin) { $char = 32; if (!is_null($bin)) { // Pad the binary strings $bin = str_pad($bin, 5, 0, STR_PAD_RIGHT); $char = bindec($bin); } // Base32 character $base32String .= self::$alphabet[$char]; } return $base32String; } /** * Decodes base32 * * @param string $base32String Base32 encoded string * @return string Clear text string */ public static function decode($base32String) { // Only work in upper cases $base32String = strtoupper($base32String); // Remove anything that is not base32 alphabet $pattern = '/[^A-Z2-7]/'; $base32String = preg_replace($pattern, '', $base32String); if (strlen($base32String) == 0) { // Gives an empty string return ''; } $base32Array = str_split($base32String); $string = ''; foreach ($base32Array as $str) { $char = strpos(self::$alphabet, $str); // Ignore the padding character if ($char !== 32) { $string .= sprintf('%05b', $char); } } while (strlen($string) %8 !== 0) { $string = substr($string, 0, strlen($string)-1); } $binaryArray = self::chunk($string, 8); $realString = ''; foreach ($binaryArray as $bin) { // Pad each value to 8 bits $bin = str_pad($bin, 8, 0, STR_PAD_RIGHT); // Convert binary strings to ASCII $realString .= chr(bindec($bin)); } return $realString; }}?>将这两个文件放到Thinkphp框架的ThinkPHP\Library\Vendor\oath目录下,oath目录是自己创建的。2、添加数据库字段用户表添加如下字段: auth_type(0-静态密码,1-动态口令) seed(种子密钥) temp_seed(临时种子密钥) last_logintime(上次登录成功时间) last_otp(上次使用密码) 其中auth_type是为了标明用户使用的哪种认证方式,seed为用户的种子密钥,temp_seed为用户未开通前临时保存的一个种子密钥,如果用户开通动态口令认证成功,该字段内容会填到seed字段。last_logintime和last_otp为上次认证成功的时间和动态口令,用于避免用户同一个口令重复使用。3、代码集成1)、开通动态口令在原有系统的修改密码页面,加上认证方式的选择,例如:如果用户选择动态口令方式,则会生成一张二维码显示在页面,用于用户开通动态口令。为了兼容google authtication,其二维码格式与谷歌一样。生成二维码的方法见我的另一篇《Thinkphp3.2.3整合phpqrcode生成带logo的二维码》 。 生成密钥二维码代码如下:public function qrcode() { Vendor('oath.base32'); $base32 = new \Base32(); $rand = random(16);//生成随机种子 $rand = $base32->encode($rand); $rand=str_replace('=','',$rand);//去除填充的‘=' $errorCorrectionLevel =intval(3) ;//容错级别 $matrixPointSize = intval(8);//生成图片大小 //生成二维码图片 Vendor('phpqrcode.phpqrcode'); $object = new \QRcode(); $text = sprintf("otpauth://totp/%s?secret=%s", $user, $rand); $object->png($text, false, $errorCorrectionLevel, $matrixPointSize, 2); 生成的种子$rand保存到数据库的temp_seed字段 }random是生成随机字符串函数。$rand=str_replace('=','',$rand)这句代码是因为谷歌手机令牌中base32解码算法并没有填充的‘='号。 验证用户动态口令的代码如下:从数据库读取temp_seedVendor('oath.oath');$object = new \Google2FA();if($object->verify_key($temp_seed, $otp)){ 验证成功,将数据库更新seed为temp_seed,auth_type为1,last_otp为otp}2)、动态口令登录用户动态口令登录验证的代码:从数据库读取auth_type,seed,last_otp字段。if($auth_type==1){//动态口令 //防止重复认证 if($lat_otp == $otp) { 动态口令重复使用返回 } Vendor('oath.oath'); $object = new \Google2FA(); if(!$object->verify_key($seed, $otp)) { 动态口令不正确 } else { 登录成功,将数据库更新last_otp为$otp,last_logintime为time() } }4、测试验证下载google authtication,使用静态密码登录系统,进入修改密码页面。 打开google authtication,扫描二维码,会显示动态口令。保存内容,开通动态口令成功! 然后你就可以用高大上的动态口令登录系统了!以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。撸飞哥-在线观看
 
 
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