<?php //namespace Base32; /** * Base32 encoder and decoder * * Last update: 2012-06-20 * * RFC 4648 compliant * @link * * Some groundwork based on this class * https://github.com/NTICompass/PHP-Base32 * * @author Christian Riesen <chris.riesen@gmail.com> * @link * @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：