135 lines
3.3 KiB
PHP
135 lines
3.3 KiB
PHP
<?php
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namespace app\common\util;
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use think\facade\Config;
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use think\facade\Request;
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/**
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* JWT工具类
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* 用于生成和验证JWT令牌
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*/
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class JwtUtil
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{
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/**
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* 密钥
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* @var string
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*/
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protected static $secret = 'YiShi@2023#JWT';
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/**
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* 头部
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* @var array
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*/
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protected static $header = [
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'alg' => 'HS256', // 加密算法
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'typ' => 'JWT' // 类型
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];
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/**
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* 创建JWT令牌
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* @param array $payload 载荷信息
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* @param int $expire 过期时间(秒)，默认2小时
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* @return string
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*/
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public static function createToken($payload, $expire = 7200)
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{
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$header = self::base64UrlEncode(json_encode(self::$header, JSON_UNESCAPED_UNICODE));
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// 附加过期时间
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$payload['exp'] = time() + $expire;
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$payload['iat'] = time(); // 签发时间
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$payload = self::base64UrlEncode(json_encode($payload, JSON_UNESCAPED_UNICODE));
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$signature = self::signature($header . '.' . $payload, self::$secret);
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return $header . '.' . $payload . '.' . $signature;
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}
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/**
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* 验证令牌
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* @param string $token 令牌
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* @return array|bool 验证通过返回载荷信息，失败返回false
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*/
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public static function verifyToken($token)
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{
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if (empty($token)) {
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return false;
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}
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$tokenArray = explode('.', $token);
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if (count($tokenArray) != 3) {
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return false;
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}
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list($header, $payload, $signature) = $tokenArray;
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// 验证签名
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if (self::signature($header . '.' . $payload, self::$secret) !== $signature) {
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return false;
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}
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// 解码载荷
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$payload = json_decode(self::base64UrlDecode($payload), true);
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// 验证是否过期
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if (isset($payload['exp']) && $payload['exp'] < time()) {
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return false;
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}
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return $payload;
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}
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/**
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* 生成签名
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* @param string $input 输入
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* @param string $key 密钥
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* @return string
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*/
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private static function signature($input, $key)
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{
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return self::base64UrlEncode(hash_hmac('sha256', $input, $key, true));
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}
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/**
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* URL安全的Base64编码
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* @param string $input
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* @return string
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*/
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private static function base64UrlEncode($input)
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{
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return str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($input));
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}
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/**
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* URL安全的Base64解码
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* @param string $input
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* @return string
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*/
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private static function base64UrlDecode($input)
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{
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$remainder = strlen($input) % 4;
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if ($remainder) {
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$input .= str_repeat('=', 4 - $remainder);
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}
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return base64_decode(str_replace(['-', '_'], ['+', '/'], $input));
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}
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/**
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* 从请求头中获取Token
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* @return string|null
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*/
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public static function getRequestToken()
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{
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$authorization = Request::header('Authorization');
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if (!$authorization) {
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return null;
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}
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// 检查Bearer前缀
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if (strpos($authorization, 'Bearer ') !== 0) {
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return null;
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}
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return substr($authorization, 7);
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}
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}
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