验证重要的在于一个算法规则,大致有几种常用的签名验证,记录一下
(1)时间戳,随机数,口令(token)先按照大小写排序,拼接成字符串,sha1加密,MD5加密,转换成大写
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2017/3/16 0016
* Time: 16:01
*/
namespace Server\Controller;
use Think\Controller;
class ServerController extends Controller{
const TOKEN = 'API';
//响应前台的请求
public function respond(){
//验证身份
$timeStamp = $_GET['t'];
$randomStr = $_GET['r'];
$signature = $_GET['s'];
$str = $this -> arithmetic($timeStamp,$randomStr);
if($str != $signature){
echo "-1";
exit;
}
//模拟数据
$arr['name'] = 'api';
$arr['age'] = 15;
$arr['address'] = 'zz';
$arr['ip'] = "192.168.0.1";
echo json_encode($arr);
}
/**
* @param $timeStamp 时间戳
* @param $randomStr 随机字符串
* @return string 返回签名
*/
public function arithmetic($timeStamp,$randomStr){
$arr['timeStamp'] = $timeStamp;
$arr['randomStr'] = $randomStr;
$arr['token'] = self::TOKEN;
//按照首字母大小写顺序排序
sort($arr,SORT_STRING);
//拼接成字符串
$str = implode($arr);
//进行加密
$signature = sha1($str);
$signature = md5($signature);
//转换成大写
$signature = strtoupper($signature);
return $signature;
}
}
其中token为前后台协商好的一个口令。另外为了防止别人抓包,在后台验证的时候最好再判断一下传过来的时间戳和当前时间对比,不一致就可能是别人假的请求(为了防止客户端和服务器有时间差,可以设置一定的时间差)
因为没有前端页面,所以用curl模拟一个get请求
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2017/3/16 0016
* Time: 15:56
*/
namespace Client\Controller;
use Think\Controller;
class ClientController extends Controller{
const TOKEN = 'API';
//模拟前台请求服务器api接口
public function getDataFromServer(){
//时间戳
$timeStamp = time();
//随机数
$randomStr = $this -> createNonceStr();
//生成签名
$signature = $this -> arithmetic($timeStamp,$randomStr);
//url地址
$url = "http://www.apitest.com/Server/Server/respond/t/{$timeStamp}/r/{$randomStr}/s/{$signature}";
$result = $this -> httpGet($url);
dump($result);
}
//curl模拟get请求。
private function httpGet($url){
$curl = curl_init();
//需要请求的是哪个地址
curl_setopt($curl,CURLOPT_URL,$url);
//表示把请求的数据已文件流的方式输出到变量中
curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
$result = curl_exec($curl);
curl_close($curl);
return $result;
}
//随机生成字符串
private function createNonceStr($length = 8) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return "z".$str;
}
/**
* @param $timeStamp 时间戳
* @param $randomStr 随机字符串
* @return string 返回签名
*/
private function arithmetic($timeStamp,$randomStr){
$arr['timeStamp'] = $timeStamp;
$arr['randomStr'] = $randomStr;
$arr['token'] = self::TOKEN;
//按照首字母大小写顺序排序
sort($arr,SORT_STRING);
//拼接成字符串
$str = implode($arr);
//进行加密
$signature = sha1($str);
$signature = md5($signature);
//转换成大写
$signature = strtoupper($signature);
return $signature;
}
}
制定一个token生成规则,按某些服务器端和客户端都拥有的共同属性生成一个随机串,客户端生成这个串,服务器收到请求也校验这个串。
比如:一个使用PHP框架的工程,框架每次交互都会有 module和action两个参数做路由,这样的话,我就可以用下边这个规则来生成token
app要请求用户列表,api是“index.php?module=user&action=list”
app生成token = md5sum ('user'.'2012-11-28'.'#$@%!'.list) = 880fed4ca2aabd20ae9a5dd774711de2;
实际发起请求为 “index.php?module=user&action=list&token=880fed4ca2aabd20ae9a5dd774711de2”
服务器端接到请求用同样方法计算token,
<?php
$module = $_GET['module'];
$action = $_GET['action'];
$token = md5sum($module.date('Y-m-d',time()).'#$@%!*'.$action);
if($token != $_GET['token']){
alarm('access deny');
exit();
}
?>
暂时记录两种方法