php单点登录SSO
单点登录步骤:
用户访问应用程序a.com
应用程序a.com重定向到login.com(认证中心)并带上对应的应用程序地址
login.com进行数据认证
login.com返回到a.com后面加上一个ticket(令牌)
a.com服务器得到ticket与login.com进行交互得到用户的信息
显示用户信息
主要:
得到用户信息要控制服务器的来源
对ticket进行加密
下面技术两种单点登录的形式:
-
同域下面SSO登录
如果我有一个站点一级域名为:58kankan.cn我要求http://a.58kankan.cn和http://b.58kankan.cn只要其中一个站点登录了我就可以访问另外一个站点.实现方式如下:将登录的Cookie保存到58kankan.cn下面就可以了
[php] view plaincopy
setcookie("userName",$uname,time()+3600,'','58kankan.cn');
不同域下面的SSO
原理是在任意一个域名下登录以后,登录系统使用获得的用户登录数据分别去请求其他的域的登录接口(具体应用的时候可以通过iframe等方式隐藏的向其他域提交),相应接口返回对应域的cookies信息,这样当用户访问站群内其他站点的时候,因已经提前获取了认证cookies因此实现了单点登录
比如sohu的单点登录系统就是采用的此方法,当用户在sohu旗下的任意网站登录时,首先统一登录到域passport.sohu.com下,登录成功后再使用iframe去请求其域下的passport.sohu.com/sso/crossdomain_all.jsp?action=login文件,此文件里面是一些js的文件请求,同样是请求passport.sohu.com域下文件,而此文件会读取cookies信息,并附加其身份信息重定向到其他的域上,其他的域根据附加过来的信息写cookies,实现多域的单点登录。退出的时候也是同样的机制。虽然原理简单,但涉及到了浏览器的隐私机制,ie需要设置特殊的文件头才可以正常设置跨域的cookies信息,详情可以看下设置P3P头实现跨域访问COOKIE,具体就是在重定向后的url页面设置cookies的时候,首先输出:
[php] view plaincopy
下面我来看看代码实现过程:
Success.php代码如下:
[php] view plaincopy
Croeedomain_all.php代码如下:
[php] view plaincopy
Crossdomain.php代码如下:
[php] view plaincopy
58gou站点的setcookie.php代码如下:
[php] view plaincopy
其实在crossdomain_all.php中的就可以直接向你要发送的站点去设置cookie信息了,我这边只是将javascript和iframe弄到了一起呵呵
header('P3P: CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE GOV"');
$username = $_GET['userName'];
$action = $_GET['action'];
switch ($action){
case 'login':
setcookie("userName",$username,time()+3600,"/","58kankan.cn");
break;
default :
setcookie("userName",'',0,"/","58kankan.cn");
break;
}
if( $_COOKIE['userName'] ){
$username = $_COOKIE['userName'];
$action = $_GET['action'];
$domain = $_GET['domain'];
switch ( $action ){
case 'login':
header("Location:http://".$domain.'/setcookie.php?userName='.$username.'&action='.$action);
break;
case 'logout':
default :
header("Location:http://".$domain.'/setcookie.php?userName='.$username.'&action='.$action);
break;
}
?>
header("Location:/");
}?>
if( $_COOKIE['userName'] ){
$username = $_COOKIE['userName'];
$action = $_GET['action'];
?>
<script>"></script>
<script>"></script>
header("Location:/");
}?>
if( $_COOKIE['userName'] ){
$username = $_COOKIE['userName'];
?>
<script>var _frm = document.createElement("iframe"); </script>
_frm.style.display="none";
_frm.src = "crossdomain_all.php?action=login";
document.head.appendChild(_frm);
-
欢迎登录
header("Location:/");
}?>
header('P3P: CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE GOV"');
跨域设置cookie设置cookie的时候可以分别用到iframe和javascript两种形式来实行

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