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<?php
/**
* 处理token生成与校验
*/
namespace app\api\service;
use app\api\exception\AppIdOrAppSecretInvalid;
use app\api\exception\InvalidTokenException;
use app\api\validate\TokenValidate;
use app\api\exception\SignIsNotInvalid;
use think\Db;
use think\facade\Cache;
use think\facade\Request;
class Token
{
/**
* 生成token之前 先验证签名
* @return string
*/
public function create(){
$appId = request()->get('app_id');
$sign = request()->get('sign');
$timestamp = request()->get('timestamp');
(new TokenValidate)->scene('create')->verify();
$condition['app_id'] = $appId;
$result = Db::table('key')->where($condition)->find();
if(!$result){
throw new AppIdOrAppSecretInvalid;
}
//服务端生成签名sign与客户端sign进行比较
$serveSign = md5(sha1($result['app_secret'].$timestamp.$result['serverAuthenticateStaticKey']));
if($sign !== $serveSign){
//签名错误，无法生成token
throw new SignIsNotInvalid;
}
return $this->createToken($appId,$result['app_secret'],$result['serverAuthenticateStaticKey'],$timestamp);
}
private function createToken($appId,$app_secret,$serverAuthenticateStaticKey,$timestamp){
$token = md5(sha1($app_secret.$serverAuthenticateStaticKey.$timestamp));
Cache::store('redis')->set($token,$appId,7200);
$data['token']=$token;
$data['expire_in']=7200;
return json(['code'=>200,'message'=>'SUCCESS','data'=>$data]);
}
/**
* 校验token是否有效
* @return bool
*/
public function check(){
(new TokenValidate)->scene('check')->verify();
$token = Request::get('token');
if( Cache::store('redis')->get($token)){
return true;
} else {
throw new InvalidTokenException;
}
}
}