<?php
class JwtBase {
//头部
private static $header=array(
'alg'=>'HS256', //生成signature的算法
'typ'=>'JWT' //类型
);
//使用HMAC生成信息摘要时所使用的密钥
private static $key='zhouein';
/**
* 获取jwt token
* @return bool|string
*/
public static function getToken(array $payload){
$arr = [
'iss'=>'zhouein', //该JWT的签发者
'iat'=>time(), //签发时间
'exp'=>time()+3600*24*15, //过期时间
'nbf'=>time(), //该时间之前不接收处理该Token
'sub'=>'zhouein.com', //面向的用户
'jti'=>md5(uniqid('JWT').time()) //该Token唯一标识
];
$payload = array_merge($arr,$payload);
if(is_array($payload))
{
$base64header=self::base64UrlEncode(json_encode(self::$header,JSON_UNESCAPED_UNICODE));
$base64payload=self::base64UrlEncode(json_encode($payload,JSON_UNESCAPED_UNICODE));
$token=$base64header.'.'.$base64payload.'.'.self::signature($base64header.'.'.$base64payload,self::$key,self::$header['alg']);
return $token;
}else{
return false;
}
}
/**
* 验证token是否有效,默认验证exp,nbf,iat时间
* @param string $Token 需要验证的token
* @return bool|string
*/
public static function verifyToken($Token,$secret){
$tokens = explode('.', $Token);
if (count($tokens) != 3)
return false;
list($base64header, $base64payload, $sign) = $tokens;
//获取jwt算法
$base64decodeheader = json_decode(self::base64UrlDecode($base64header), JSON_OBJECT_AS_ARRAY);
//echo "验证码为:".self::signature($base64header . '.' . $base64payload, $secret, $base64decodeheader['alg']);
//ECHO "<BR>";
//echo "你输入的验证码为:".$sign;
//ECHO "<BR>";
//echo "密钥是:".$secret;
if (empty($base64decodeheader['alg']))
return false;
//签名验证
if (self::signature($base64header . '.' . $base64payload, $secret, $base64decodeheader['alg']) !== $sign)
//echo "<br>密钥不正确<br>";
return false;
if (self::signature($base64header . '.' . $base64payload, $secret, $base64decodeheader['alg']) == $sign)
echo "<br>密钥正确:<font size='6' color='red'>".$secret."</font><br>";
echo "经过计算验证码为:".self::signature($base64header . '.' . $base64payload, $secret, $base64decodeheader['alg']);
ECHO "<BR>";
echo "你输入的验证码为:".$sign;
ECHO "<BR>";
//return false;
$payload = json_decode(self::base64UrlDecode($base64payload), JSON_OBJECT_AS_ARRAY);
//签发时间大于当前服务器时间验证失败
if (isset($payload['iat']) && $payload['iat'] > time())
return false;
//过期时间小宇当前服务器时间验证失败
if (isset($payload['exp']) && $payload['exp'] < time())
return false;
//该nbf时间之前不接收处理该Token
if (isset($payload['nbf']) && $payload['nbf'] > time())
return false;
return $payload;
}
/**
* base64UrlEncode https://jwt.io/ 中base64UrlEncode编码实现
* @param string $input 需要编码的字符串
* @return string
*/
private static function base64UrlEncode($input){
return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
}
/**
* base64UrlEncode https://jwt.io/ 中base64UrlEncode解码实现
* @param string $input 需要解码的字符串
* @return bool|string
*/
private static function base64UrlDecode($input){
$remainder = strlen($input) % 4;
if ($remainder) {
$addlen = 4 - $remainder;
$input .= str_repeat('=', $addlen);
}
return base64_decode(strtr($input, '-_', '+/'));
}
/**
* HMACSHA256签名 https://jwt.io/ 中HMACSHA256签名实现
* @param string $input 为base64UrlEncode(header).".".base64UrlEncode(payload)
* @param string $key
* @param string $alg 算法方式
* @return mixed
*/
private static function signature($input, $key, $alg = 'HS256'){
$alg_config=array(
'HS256'=>'sha256'
);
return self::base64UrlEncode(hash_hmac($alg_config[$alg], $input, $key,true));
}
}
//////////////////////////////1.生成token////////////
$token = JwtBase::getToken(['user_id'=>'0000']);
echo $token;
echo "<br>";
/////////////////////////////2.验证//////////////////////
//$secret="zhouein";
//$data_a = JwtBase::verifyToken($token,$secret);
//var_dump($data_a);
//echo "<br>======================================<br>";
//echo "<br>======================================<br>";
/////////////////////////////3.循环验证//////////////////////
$zidian=array(
'zhouein001',
'zhouein',
'zhouein002',
'%null%',
'your-256-bit-secret'
);
foreach($zidian as $key => $secret ){
//echo "<br>".$key."<br>";
//echo $secret."<br>";
//$secret="zhouein1";
$token_b='eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ6aG91ZWluIiwiaWF0IjoxNjQ0NTUyNTYzLCJleHAiOjE2NDU4NDg1NjMsIm5iZiI6MTY0NDU1MjU2Mywic3ViIjoiemhvdWVpbi5jb20iLCJqdGkiOiIxZWU2YzAyMjE5NTYwYTkzNTI5YmZkYTJjNjA1Y2I4OCIsInVzZXJfaWQiOiIwMDAwIn0.FkUBz1iYmMbE9N-AvZD1fMMqeoLjh5zeWaJumAg8Wi0';
$data_a = JwtBase::verifyToken($token_b,$secret);
//var_dump($data_a);
//echo "<br>============================".$key."===========================<br>";
}
