HOST文件配置如下:

127.0.0.1 app.com

127.0.0.1 sso.com

IIS配置如下:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_数据库

应用程序池采用.Net Framework 4.0

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_重定向_02

注意IIS绑定的域名,两个完全不同域的域名。

app.com网站配置如下:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_SSO_03

sso.com网站配置如下:

memcached缓存:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_数据库_04

数据库配置:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_用户授权_05

数据库采用EntityFramework 6.0.0,首次运行会自动创建相应的数据库和表结构。

授权验证过程演示:

在浏览器地址栏中访问:http://app.com,如果用户还未登陆则网站会自动重定向至:http://sso.com/passport,同时通过QueryString传参数的方式将对应的AppKey应用标识传递过来,运行截图如下:

URL地址:http://sso.com/passport?appkey=670b14728ad9902aecba32e22fa4f6bd&username=

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_重定向_06

输入正确的登陆账号和密码后,点击登陆按钮系统自动301重定向至应用会掉首页,毁掉成功后如下所示:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_用户授权_07

由于在不同的域下进行SSO授权登陆,所以采用QueryString方式返回授权标识。同域网站下可采用Cookie方式。由于301重定向请求是由浏览器发送的,所以在如果授权标识放入Handers中的话,浏览器重定向的时候会丢失。重定向成功后,程序自动将授权标识写入到Cookie中,点击其他页面地址时,URL地址栏中将不再会看到授权标示信息。Cookie设置如下:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_数据库_08

登陆成功后的后续授权验证(访问其他需要授权访问的页面):

校验地址:http://sso.com/api/passport?sessionkey=xxxxxx&remark=xxxxxx

返回结果:true,false

客户端可以根据实际业务情况,选择提示用户授权已丢失,需要重新获得授权。默认自动重定向至SSO登陆页面,即:http://sso.com/passport?appkey=670b14728ad9902aecba32e22fa4f6bd&username=seo@ljja.cn 同时登陆页面邮箱地址文本框会自定补全用户的登陆账号,用户只需输入登陆密码即可,授权成功后会话有效期自动延长一年时间。

SSO数据库验证日志:

用户授权验证日志:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_oauth_09

用户授权会话Session:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_oauth_10

数据库用户账号和应用信息:

ASP.NET MVC SSO单点登录设计与实现(转发)(待续)_用户授权_11

应用授权登陆验证页面核心代码:

1 /// <summary>   2     ///  公钥:AppKey   3     ///  私钥:AppSecret   4     ///  会话:SessionKey   5     /// </summary>   6     public class PassportController : Controller   7     {   8         private readonly IAppInfoService _appInfoService = new AppInfoService();   9         private readonly IAppUserService _appUserService = new AppUserService();  10         private readonly IUserAuthSessionService _authSessionService = new UserAuthSessionService();  11         private readonly IUserAuthOperateService _userAuthOperateService = new UserAuthOperateService();  12   13         private const string AppInfo = "AppInfo";  14         private const string SessionKey = "SessionKey";  15         private const string SessionUserName = "SessionUserName";  16   17         //默认登录界面  18         public ActionResult Index(string appKey = "", string username = "")  19         {  20             TempData[AppInfo] = _appInfoService.Get(appKey);  21   22             var viewModel = new PassportLoginRequest  23             {  24                 AppKey = appKey,  25                 UserName = username  26             };  27   28             return View(viewModel);  29         }  30   31         //授权登录  32         [HttpPost]  33         public ActionResult Index(PassportLoginRequest model)  34         {  35             //获取应用信息  36             var appInfo = _appInfoService.Get(model.AppKey);  37             if (appInfo == null)  38             {  39                 //应用不存在  40                 return View(model);  41             }  42   43             TempData[AppInfo] = appInfo;  44   45             if (ModelState.IsValid == false)  46             {  47                 //实体验证失败  48                 return View(model);  49             }  50   51             //过滤字段无效字符  52             model.Trim();  53   54             //获取用户信息  55             var userInfo = _appUserService.Get(model.UserName);  56             if (userInfo == null)  57             {  58                 //用户不存在  59                 return View(model);  60             }  61   62             if (userInfo.UserPwd != model.Password.ToMd5())  63             {  64                 //密码不正确  65                 return View(model);  66             }  67   68             //获取当前未到期的Session  69             var currentSession = _authSessionService.ExistsByValid(appInfo.AppKey, userInfo.UserName);  70             if (currentSession == null)  71             {  72                 //构建Session  73                 currentSession = new UserAuthSession  74                 {  75                     AppKey = appInfo.AppKey,  76                     CreateTime = DateTime.Now,  77                     InvalidTime = DateTime.Now.AddYears(1),  78                     IpAddress = Request.UserHostAddress,  79                     SessionKey = Guid.NewGuid().ToString().ToMd5(),  80                     UserName = userInfo.UserName  81                 };  82   83                 //创建Session  84                 _authSessionService.Create(currentSession);  85             }  86             else  87             {  88                 //延长有效期,默认一年  89                 _authSessionService.ExtendValid(currentSession.SessionKey);  90             }  91   92             //记录用户授权日志  93             _userAuthOperateService.Create(new UserAuthOperate  94             {  95                 CreateTime = DateTime.Now,  96                 IpAddress = Request.UserHostAddress,  97                 Remark = string.Format("{0} 登录 {1} 授权成功", currentSession.UserName, appInfo.Title),  98                 SessionKey = currentSession.SessionKey  99             }); 104  105             var redirectUrl = string.Format("{0}?SessionKey={1}&SessionUserName={2}", 106                 appInfo.ReturnUrl,  107                 currentSession.SessionKey,  108                 userInfo.UserName); 109  110             //跳转默认回调页面 111             return Redirect(redirectUrl); 112         } 113     }


Memcached会话标识验证核心代码:

public class PassportController : ApiController     {         private readonly IUserAuthSessionService _authSessionService = new UserAuthSessionService();         private readonly IUserAuthOperateService _userAuthOperateService = new UserAuthOperateService();          public bool Get(string sessionKey = "", string remark = "")         {             if (_authSessionService.GetCache(sessionKey))             {                 _userAuthOperateService.Create(new UserAuthOperate                 {                     CreateTime = DateTime.Now,                     IpAddress = Request.RequestUri.Host,                     Remark = string.Format("验证成功-{0}", remark),                     SessionKey = sessionKey                 });                  return true;             }              _userAuthOperateService.Create(new UserAuthOperate             {                 CreateTime = DateTime.Now,                 IpAddress = Request.RequestUri.Host,                 Remark = string.Format("验证失败-{0}", remark),                 SessionKey = sessionKey             });              return false;         }     }


Client授权验证Filters Attribute

public class SSOAuthAttribute : ActionFilterAttribute     {         public const string SessionKey = "SessionKey";         public const string SessionUserName = "SessionUserName";          public override void OnActionExecuting(ActionExecutingContext filterContext)         {             var cookieSessionkey = "";             var cookieSessionUserName = "";              //SessionKey by QueryString             if (filterContext.HttpContext.Request.QueryString[SessionKey] != null)             {                 cookieSessionkey = filterContext.HttpContext.Request.QueryString[SessionKey];                 filterContext.HttpContext.Response.Cookies.Add(new HttpCookie(SessionKey, cookieSessionkey));             }              //SessionUserName by QueryString             if (filterContext.HttpContext.Request.QueryString[SessionUserName] != null)             {                 cookieSessionUserName = filterContext.HttpContext.Request.QueryString[SessionUserName];                 filterContext.HttpContext.Response.Cookies.Add(new HttpCookie(SessionUserName, cookieSessionUserName));             }              //从Cookie读取SessionKey             if (filterContext.HttpContext.Request.Cookies[SessionKey] != null)             {                 cookieSessionkey = filterContext.HttpContext.Request.Cookies[SessionKey].Value;             }              //从Cookie读取SessionUserName             if (filterContext.HttpContext.Request.Cookies[SessionUserName] != null)             {                 cookieSessionUserName = filterContext.HttpContext.Request.Cookies[SessionUserName].Value;             }              if (string.IsNullOrEmpty(cookieSessionkey) || string.IsNullOrEmpty(cookieSessionUserName))             {                 //直接登录                 filterContext.Result = SsoLoginResult(cookieSessionUserName);             }             else             {                 //验证                 if (CheckLogin(cookieSessionkey, filterContext.HttpContext.Request.RawUrl) == false)                 {                     //会话丢失,跳转到登录页面                     filterContext.Result = SsoLoginResult(cookieSessionUserName);                 }             }              base.OnActionExecuting(filterContext);         }          public static bool CheckLogin(string sessionKey, string remark = "")         {             var httpClient = new HttpClient             {                 BaseAddress = new Uri(ConfigurationManager.AppSettings["SSOPassport"])             };              var requestUri = string.Format("api/Passport?sessionKey={0}&remark={1}", sessionKey, remark);              try             {                 var resp = httpClient.GetAsync(requestUri).Result;                  resp.EnsureSuccessStatusCode();                  return resp.Content.ReadAsAsync<bool>().Result;             }             catch (Exception ex)             {                 throw ex;             }         }          private static ActionResult SsoLoginResult(string username)         {             return new RedirectResult(string.Format("{0}/passport?appkey={1}&username={2}",                     ConfigurationManager.AppSettings["SSOPassport"],                     ConfigurationManager.AppSettings["SSOAppKey"],                     username));         }     }


示例SSO验证特性使用方法:

[SSOAuth]     public class HomeController : Controller     {         public ActionResult Index()         {             return View();         }          public ActionResult About()         {             ViewBag.Message = "Your application description page.";              return View();         }          public ActionResult Contact()         {             ViewBag.Message = "Your contact page.";              return View();         }     }



总结:

从草稿示例代码中可以看到代码性能上还有很多优化的地方,还有SSO应用授权登陆页面的用户账号不存在、密码错误等一系列的提示信息等。在业务代码运行基本正确的后期,可以考虑往更多的安全性层面优化,比如启用AppSecret私钥签名验证,IP范围验证,固定会话请求攻击、SSO授权登陆界面的验证码、会话缓存自动重建、SSo服务器、缓存的水平扩展等。

源码地址:https://github.com/smartbooks/SmartSSO