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PHP编程 SSO详细介绍及简单实例

发布时间：2017-1-25 22:11

PHP SSO详解

SSO有三种模式:①跨子域单点登陆②完全跨单点域登陆③站群共享身份认证

第一种模式很简单,只需要将Cookie的域设置成多个应用的根域即可

第二种方式,也很简单,就是将所以应用的认证地址更换成同一个认证地址,每次查看是否在认证中心登陆,如果登陆了,给调用应用发放一个加密令牌即可

第三种跨域,就是来回跳转来回验证token略有麻烦

配置目录结构

在服务器根目录下,新建三个项目目录:

|–/网站根目录/
|–|–/oa/
|–|–/bbs/
|–|–/blog/

在根目录下新建functions.PHP脚本文件,具体内容如下:

<?php

/**
 * 获取登陆token
 * @param string $url 获取token的地址
 * 2017-01-03T13:08:43+0800
 */
function getToken($url)
{
  $bool = isLogin();
  if ($bool) {
    // 如果登陆了跳转到本站首页
    header('location: index.php');
    exit();
  }

  // 否则没有登陆,去另一个站点看是否登陆
  header('location: '.$url);
}

// 校验令牌是否正确
function yzToken($domain)
{
  $url = isset($_GET['url']) ? $_GET['url'] : '';
  $username = isset($_GET['username']) ? $_GET['username'] : '';
  $token = isset($_GET['token']) ? $_GET['token'] : '';


  if (!empty($username) && !empty($token)) {
    $salt = 'taoip';
    $_token = md5($salt.$username);
    // 校验第三方站点过来时的token是否正确
    if ($_token == $token) {
      // 设置跳转过来的网站的Cookie
      setCook($username, $_token, $domain);
      header('location: index.php');
    }
  }

}

// 设置cookie
function setCook($username, $_password, $domain)
{
  // 校验成功,开始登陆
  setcookie('username', $username, time()+3600, '/', $domain);
  setcookie('token', $_password, time()+3600, '/', $domain);
  header('location: index.php');
}

// 判断是否登陆
function isLogin()
{
  $username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
  $token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';
  $salt = 'taoip';

  $_token = md5($salt.$username);

  if ($token == $_token) {
    return true;
  } else {
    return false;
  }
}

?>

在oa项目目录下,新建index.php和login.php两个脚本文件

编辑index.php文件

<?php

// OA站点

// (1)开启Session会话
session_name('taoip');
session_start();
// (2)获取用户名和token进行校验
$username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
$token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';

$salt = 'taoip';

$_token = md5($salt.$username);

if ($token != $_token) {
  header('location: login.php');
  exit();
}

echo "欢迎{$username}用户,访问OA站点";

?>

编辑login.php文件

<?php

// OA站点登陆系统
require '../functions.php';

// (2)验证
yzToken('taoip.cn');

// (1)判断是否登陆,登陆则跳转首页,未登录则去其他站点获取token
$url = isset($_GET['url']) ? $_GET['url'] : '';
if (empty($url)) {
  getToken('http://dengpeng.cc/login.php?url=http://oa.taoip.cn/login.php');
}

// (1)判断用户是否登陆
$bool = isLogin();
$url = isset($_GET['url']) ? $_GET['url'] : '';
if ($bool) {
  if (empty($url)) {
    header('location: index.php');
  } else {
    $username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
    $token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';
    $lurl = $url.'?username='.$username.'&token='.$token;
    header('location: '.$lurl);
  }
}


if (!empty($_POST)) {
  $username = isset($_POST['username']) ? $_POST['username'] : '';
  $password = isset($_POST['password']) ? $_POST['password'] : '';

  // 从库中查询用户密码
  @$link = mysql_connect('localhost', 'root', '');
  mysql_query('use sso', $link);
  mysql_query('set names utf8', $link);
  $sql = "select * from users where username = '".$username."'";
  $user = mysql_fetch_assoc(mysql_query($sql, $link));

  // 校验
  $salt = 'taoip';
  $_password = md5($salt.$username);

  // var_dump($user['password'] == $_password);
  // print_r($user);exit();

  if ($user['password'] == $_password) {
    // 校验成功,开始登陆
    setcookie('username', $username, time()+3600, '/', 'taoip.cn');
    setcookie('token', $_password, time()+3600, '/', 'taoip.cn');
    // 如果URL没有值重定向到首页,否则重定向到URL页面
    if (empty($url)) {
      header('location: index.php');
    } else {
      header('location: '.$lurl);
    }
  }
}

?>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="generator" content="Sublime Text 3114">
  <meta name="author" content="3@dengpeng.cc">
  <meta name="keywords" content="">
  <meta name="description" content="">
  <title>OA站点登陆系统</title>
</head>
<body>
  <div class="container">
    <h2>oa.taoip.cn站点登陆系统</h2>
    <form action="" method="post">
      <label for="">用户名</label>
      <input type="text" name="username">
      <br>
      <label for="">密码</label>
      <input type="text" name="password">
      <hr>
      <button type="submit">提交</button>
    </form>
  </div>
</body>
</html>

在bbs项目目录下,新建index.php和login.php两个脚本文件

编辑index.php文件

<?php
/**
 * @author DengPeng <3@dengpeng.cc>
 * @since 2017/01/03
 * @copyright copyright (c) 2017 zixue.it GPL
 * @license http://www.zixue.it/
 */

// BBS站点

// (1)开启Session会话
session_name('taoip');
session_start();
// (2)获取用户名和token进行校验
$username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
$token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';

$salt = 'taoip';

$_token = md5($salt.$username);

if ($token != $_token) {
  header('location: login.php');
  exit();
}

echo "欢迎{$username}用户,访问BBS站点";

?>

编辑login.php文件

<?php
/**
 * @author DengPeng <3@dengpeng.cc>
 * @since 2017/01/03
 * @copyright copyright (c) 2017 zixue.it GPL
 * @license http://www.zixue.it/
 */

// BBS站点登陆系统
require '../functions.php';

// (2)验证
yzToken('taoip.cn');

// (1)判断是否登陆,登陆则跳转首页,未登录则去其他站点获取token
$url = isset($_GET['url']) ? $_GET['url'] : '';
if (empty($url)) {
  getToken('http://dengpeng.cc/login.php?url=http://bbs.taoip.cn/login.php');
}

// (1)判断用户是否登陆
$bool = isLogin();
$url = isset($_GET['url']) ? $_GET['url'] : '';
if ($bool) {
  if (empty($url)) {
    header('location: index.php');
  } else {
    $username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
    $token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';
    $lurl = $url.'?username='.$username.'&token='.$token;
    header('location: '.$lurl);
  }
}


if (!empty($_POST)) {
  $username = isset($_POST['username']) ? $_POST['username'] : '';
  $password = isset($_POST['password']) ? $_POST['password'] : '';

  // 从库中查询用户密码
  @$link = mysql_connect('localhost', 'root', '');
  mysql_query('use sso', $link);
  mysql_query('set names utf8', $link);
  $sql = "select * from users where username = '".$username."'";
  $user = mysql_fetch_assoc(mysql_query($sql, $link));

  // 校验
  $salt = 'taoip';
  $_password = md5($salt.$username);

  // var_dump($user['password'] == $_password);
  // print_r($user);exit();

  if ($user['password'] == $_password) {
    // 校验成功,开始登陆
    setcookie('username', $username, time()+3600, '/', 'taoip.cn');
    setcookie('token', $_password, time()+3600, '/', 'taoip.cn');
    // 如果URL没有值重定向到首页,否则重定向到URL页面
    if (empty($url)) {
      header('location: index.php');
    } else {
      header('location: '.$lurl);
    }
  }
}

?>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="generator" content="Sublime Text 3114">
  <meta name="author" content="3@dengpeng.cc">
  <meta name="keywords" content="">
  <meta name="description" content="">
  <title>BBS站点登陆系统</title>
</head>
<body>
  <div class="container">
    <h2>bbs.taoip.cn站点登陆系统</h2>
    <form action="" method="post">
      <label for="">用户名</label>
      <input type="text" name="username">
      <br>
      <label for="">密码</label>
      <input type="text" name="password">
      <hr>
      <button type="submit">提交</button>
    </form>
  </div>
</body>
</html>

在blog项目目录下,新建index.php和login.php两个脚本文件

编辑index.php文件

<?php
/**
 * @author DengPeng <3@dengpeng.cc>
 * @since 2017/01/03
 * @copyright copyright (c) 2017 zixue.it GPL
 * @license http://www.zixue.it/
 */

// blog站点

// (1)开启Session会话
session_name('taoip');
session_start();
// (2)获取用户名和token进行校验
$username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
$token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';

$salt = 'taoip';

$_token = md5($salt.$username);

if ($token != $_token) {
  header('location: login.php');
  exit();
}

echo "欢迎{$username}用户,访问blog站点";

?>

<?php
/**
 * @author DengPeng <3@dengpeng.cc>
 * @since 2017/01/03
 * @copyright copyright (c) 2017 zixue.it GPL
 * @license http://www.zixue.it/
 */

// blog站点

// (1)开启Session会话
session_name('taoip');
session_start();
// (2)获取用户名和token进行校验
$username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
$token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';

$salt = 'taoip';

$_token = md5($salt.$username);

if ($token != $_token) {
  header('location: login.php');
  exit();
}

echo "欢迎{$username}用户,访问blog站点";

?>

编辑login.php文件

<?php
/**
 * @author DengPeng <3@dengpeng.cc>
 * @since 2017/01/03
 * @copyright copyright (c) 2017 zixue.it GPL
 * @license http://www.zixue.it/
 */

// blog站点登陆系统
require '../functions.php';

// (2)验证
yzToken('dengpeng.cc');

// (1)判断是否登陆,登陆则跳转首页,未登录则去其他站点获取token
$url = isset($_GET['url']) ? $_GET['url'] : '';
if (empty($url)) {
  getToken('http://oa.taoip.cn/login.php?url=http://dengpeng.cc/login.php');
}


// (1)判断用户是否登陆
$bool = isLogin();
$url = isset($_GET['url']) ? $_GET['url'] : '';
if ($bool) {
  if (empty($url)) {
    header('location: index.php');
  } else {
    $username = isset($_COOKIE['username']) ? $_COOKIE['username'] : '';
    $token = isset($_COOKIE['token']) ? $_COOKIE['token'] : '';
    $lurl = $url.'?username='.$username.'&token='.$token;
    header('location: '.$lurl);
  }
}


// (3)判断用户是否提交数据
if (!empty($_POST)) {
  $username = isset($_POST['username']) ? $_POST['username'] : '';
  $password = isset($_POST['password']) ? $_POST['password'] : '';

  // 从库中查询用户密码
  @$link = mysql_connect('localhost', 'root', '');
  mysql_query('use sso', $link);
  mysql_query('set names utf8', $link);
  $sql = "select * from users where username = '".$username."'";
  $user = mysql_fetch_assoc(mysql_query($sql, $link));

  // 校验
  $salt = 'taoip';
  $_password = md5($salt.$username);

  // var_dump($user['password'] == $_password);
  // print_r($user);exit();

  if ($user['password'] == $_password) {
    setCook($username, $_password, 'dengpeng.cc');
    if (empty($url)) {
      header('location: index.php');
    } else {
      header('location: '.$lurl);
    }
  }
}

?>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="generator" content="Sublime Text 3114">
  <meta name="author" content="3@dengpeng.cc">
  <meta name="keywords" content="">
  <meta name="description" content="">
  <title>blog站点登陆系统</title>
</head>
<body>
  <div class="container">
    <h2>dengpeng.cc站点登陆系统</h2>
    <form action="" method="post">
      <label for="">用户名</label>
      <input type="text" name="username">
      <br>
      <label for="">密码</label>
      <input type="text" name="password">
      <hr>
      <button type="submit">提交</button>
    </form>
  </div>
</body>
</html>

配置本地虚拟主机

具体配置步骤,我想大家应该都会了,不需要我一一赘述.你只需要按照我给的参照,配置和不同域名对应目录的映射即可.

域名 /项目目录/
oa.taoip.cn /oa/
bbs.taoip.cn /bbs/
dengpeng.cc /blog/

恭喜您,已经完成了一个简单的SSO系统

配置完成后,记得重启Web服务器.然后你只需要访问这三个不同的站点,即可实现一个站点登陆,其他站点不再发送登陆请求.

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

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