详解ASP.NET MVC SSO单点登录设计实例

互联网 17-7-3
本篇文章主要介绍了ASP.NET MVC SSO单点登录设计与实现,具有一定的参考价值,有兴趣的可以了解一下。

实验环境配置

HOST文件配置如下:

IIS配置如下:

应用程序池采用.Net Framework 4.0

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:

sso.com网站配置如下:

memcached缓存:

数据库配置:

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=

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:

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:

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:

用户授权会话Session:

数据库用户账号和应用信息:

/// <summary>    /// 公钥:AppKey    /// 私钥:AppSecret    /// 会话:SessionKey    /// </summary>    public class PassportController : Controller    {      private readonly IAppInfoService _appInfoService = new AppInfoService();      private readonly IAppUserService _appUserService = new AppUserService();      private readonly IUserAuthSessionService _authSessionService = new UserAuthSessionService();      private readonly IUserAuthOperateService _userAuthOperateService = new UserAuthOperateService();        private const string AppInfo = "AppInfo";      private const string SessionKey = "SessionKey";      private const string SessionUserName = "SessionUserName";        //默认登录界面      public ActionResult Index(string appKey = "", string username = "")      {        TempData[AppInfo] = _appInfoService.Get(appKey);          var viewModel = new PassportLoginRequest        {          AppKey = appKey,          UserName = username        };          return View(viewModel);      }        //授权登录      [HttpPost]      public ActionResult Index(PassportLoginRequest model)      {        //获取应用信息        var appInfo = _appInfoService.Get(model.AppKey);        if (appInfo == null)        {          //应用不存在          return View(model);        }          TempData[AppInfo] = appInfo;          if (ModelState.IsValid == false)        {          //实体验证失败          return View(model);        }          //过滤字段无效字符        model.Trim();          //获取用户信息        var userInfo = _appUserService.Get(model.UserName);        if (userInfo == null)        {          //用户不存在          return View(model);        }          if (userInfo.UserPwd != model.Password.ToMd5())        {          //密码不正确          return View(model);        }          //获取当前未到期的Session        var currentSession = _authSessionService.ExistsByValid(appInfo.AppKey, userInfo.UserName);        if (currentSession == null)        {          //构建Session          currentSession = new UserAuthSession          {            AppKey = appInfo.AppKey,            CreateTime = DateTime.Now,            InvalidTime = DateTime.Now.AddYears(1),            IpAddress = Request.UserHostAddress,            SessionKey = Guid.NewGuid().ToString().ToMd5(),            UserName = userInfo.UserName          };            //创建Session          _authSessionService.Create(currentSession);        }        else        {          //延长有效期,默认一年          _authSessionService.ExtendValid(currentSession.SessionKey);        }          //记录用户授权日志        _userAuthOperateService.Create(new UserAuthOperate        {          CreateTime = DateTime.Now,          IpAddress = Request.UserHostAddress,          Remark = string.Format("{0} 登录 {1} 授权成功", currentSession.UserName, appInfo.Title),          SessionKey = currentSession.SessionKey        }); 104         var redirectUrl = string.Format("{0}?SessionKey={1}&SessionUserName={2}",          appInfo.ReturnUrl,           currentSession.SessionKey,           userInfo.UserName);          //跳转默认回调页面        return Redirect(redirectUrl);      }    }  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;      }    }
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));      }    }
[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。

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