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ASP.NET MVC SSO單點登入設計與實現(轉發)(待續)

原文:https://www.cnblogs.com/smartbooks/p/3800849.html

實驗環境配置

HOST檔案配置如下:

127.0.0.1 app.com
127.0.0.1 sso.com

IIS配置如下:

應用程式池採用.Net Framework 4.0

注意IIS繫結的域名,兩個完全不同域的域名。

app.com網站配置如下:

sso.com網站配置如下:

memcached快取:

資料庫配置:

資料庫採用EntityFramework6.0.0,首次執行會自動建立相應的資料庫和表結構。

授權驗證過程演示:

在瀏覽器位址列中訪問:http://app.com,如果使用者還未登陸則網站會自動重定向至:http://sso.com/passport,同時通過QueryString傳引數的方式將對應的AppKey應用標識傳遞過來,執行截圖如下:

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

輸入正確的登陸賬號和密碼後,點選登陸按鈕系統自動301重定向至應用會掉首頁,毀掉成功後如下所示:

由於在不同的域下進行SSO授權登陸,所以採用QueryString方式返回授權標識。同域網站下可採用Cookie方式。由於301重定向請求是由瀏覽器傳送的,所以在如果授權標識放入Handers中的話,瀏覽器重定向的時候會丟失。重定向成功後,程式自動將授權標識寫入到Cookie中,點選其他頁面地址時,URL位址列中將不再會看到授權標示資訊。Cookie設定如下:

登陸成功後的後續授權驗證(訪問其他需要授權訪問的頁面):

校驗地址:http://sso.com/api/passport?sessionkey=xxxxxx&remark=xxxxxx

返回結果:true,false

客戶端可以根據實際業務情況,選擇提示使用者授權已丟失,需要重新獲得授權。預設自動重定向至SSO登陸頁面,即:http://sso.com/passport?appkey=670b14728ad9902aecba32e22fa4f6bd&[email protected] 同時登陸頁面郵箱地址文字框會自定補全使用者的登陸賬號,使用者只需輸入登陸密碼即可,授權成功後會話有效期自動延長一年時間。

SSO資料庫驗證日誌:

使用者授權驗證日誌:

使用者授權會話Session:

資料庫使用者賬號和應用資訊:

應用授權登陸驗證頁面核心程式碼:

  1 /// <summary>
  2     ///  公鑰:AppKey
  3     ///  私鑰:AppSecret
  4     ///  會話: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         //預設登入介面
 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         //授權登入
 32         [HttpPost]
 33         public ActionResult Index(PassportLoginRequest model)
 34         {
 35             //獲取應用資訊
 36             var appInfo = _appInfoService.Get(model.AppKey);
 37             if (appInfo == null)
 38             {
 39                 //應用不存在
 40                 return View(model);
 41             }
 42 
 43             TempData[AppInfo] = appInfo;
 44 
 45             if (ModelState.IsValid == false)
 46             {
 47                 //實體驗證失敗
 48                 return View(model);
 49             }
 50 
 51             //過濾欄位無效字元
 52             model.Trim();
 53 
 54             //獲取使用者資訊
 55             var userInfo = _appUserService.Get(model.UserName);
 56             if (userInfo == null)
 57             {
 58                 //使用者不存在
 59                 return View(model);
 60             }
 61 
 62             if (userInfo.UserPwd != model.Password.ToMd5())
 63             {
 64                 //密碼不正確
 65                 return View(model);
 66             }
 67 
 68             //獲取當前未到期的Session
 69             var currentSession = _authSessionService.ExistsByValid(appInfo.AppKey, userInfo.UserName);
 70             if (currentSession == null)
 71             {
 72                 //構建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                 //建立Session
 84                 _authSessionService.Create(currentSession);
 85             }
 86             else
 87             {
 88                 //延長有效期,預設一年
 89                 _authSessionService.ExtendValid(currentSession.SessionKey);
 90             }
 91 
 92             //記錄使用者授權日誌
 93             _userAuthOperateService.Create(new UserAuthOperate
 94             {
 95                 CreateTime = DateTime.Now,
 96                 IpAddress = Request.UserHostAddress,
 97                 Remark = string.Format("{0} 登入 {1} 授權成功", 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             //跳轉預設回撥頁面
111             return Redirect(redirectUrl);
112         }
113     }

Memcached會話標識驗證核心程式碼:

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("驗證成功-{0}", remark),
                    SessionKey = sessionKey
                });

                return true;
            }

            _userAuthOperateService.Create(new UserAuthOperate
            {
                CreateTime = DateTime.Now,
                IpAddress = Request.RequestUri.Host,
                Remark = string.Format("驗證失敗-{0}", remark),
                SessionKey = sessionKey
            });

            return false;
        }
    }

Client授權驗證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));
            }

            //從Cookie讀取SessionKey
            if (filterContext.HttpContext.Request.Cookies[SessionKey] != null)
            {
                cookieSessionkey = filterContext.HttpContext.Request.Cookies[SessionKey].Value;
            }

            //從Cookie讀取SessionUserName
            if (filterContext.HttpContext.Request.Cookies[SessionUserName] != null)
            {
                cookieSessionUserName = filterContext.HttpContext.Request.Cookies[SessionUserName].Value;
            }

            if (string.IsNullOrEmpty(cookieSessionkey) || string.IsNullOrEmpty(cookieSessionUserName))
            {
                //直接登入
                filterContext.Result = SsoLoginResult(cookieSessionUserName);
            }
            else
            {
                //驗證
                if (CheckLogin(cookieSessionkey, filterContext.HttpContext.Request.RawUrl) == false)
                {
                    //會話丟失,跳轉到登入頁面
                    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驗證特性使用方法:

[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();
        }
    }

總結:

從草稿示例程式碼中可以看到程式碼效能上還有很多優化的地方,還有SSO應用授權登陸頁面的使用者賬號不存在、密碼錯誤等一系列的提示資訊等。在業務程式碼執行基本正確的後期,可以考慮往更多的安全性層面優化,比如啟用AppSecret私鑰簽名驗證,IP範圍驗證,固定會話請求攻擊、SSO授權登陸介面的驗證碼、會話快取自動重建、SSo伺服器、快取的水平擴充套件等。

原始碼地址:https://github.com/smartbooks/SmartSSO