本篇文章主要介紹了ASP.NET MVC SSO單點登入設計與實現,具有一定的參考價值,有興趣的可以瞭解一下。
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:
應用程式集區採用.Net Framework 4.0
注意IIS綁定的網域名稱,兩個完全不同域的網域名稱。
app.com網站配置如下:
sso.com網站配置如下:
memcached緩衝:
資料庫配置:
資料庫採用EntityFramework 6.0.0,首次運行會自動建立相應的資料庫和表結構。
授權驗證過程示範:
在瀏覽器地址欄中訪問:http://app.com,如果使用者還未登陸則網站會自動重新導向至:http://sso.com/passport,同時通過QueryString傳參數的方式將對應的AppKey應用標識傳遞過來,運行如下:
URL地址:http://sso.com/passport?appkey=670b14728ad9902aecba32e22fa4f6bd&username=
輸入正確的登陸帳號和密碼後,點擊登陸按鈕系統自動301重新導向至應用會掉首頁,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重新導向請求是由瀏覽器發送的,所以在如果授權標識放入Handers中的話,瀏覽器重新導向的時候會丟失。重新導向成功後,程式自動將授權標識寫入到Cookie中,點擊其他頁面地址時,URL地址欄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):
校正地址:http://sso.com/api/passport?sessionkey=xxxxxx&remark=xxxxxx
返回結果:true,false
用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。預設自動重新導向至SSO登陸頁面,即:http://sso.com/passport?appkey=670b14728ad9902aecba32e22fa4f6bd&username=seo@ljja.cn 同時登陸頁面郵箱地址文字框會自定補全使用者的登陸帳號,使用者只需輸入登陸密碼即可,授權成功後會話有效期間自動延長一年時間。
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:
資料庫使用者帳號和應用資訊:
應用授權登陸驗證頁面核心代碼:
/// <summary> /// 公開金鑰:AppKey /// 私密金鑰:AppSecret /// 會話: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"; //預設登入介面 public ActionResult Index(string appKey = "", string username = "") { TempData[AppInfo] = _appInfoService.Get(appKey); var viewModel = new PassportLoginRequest { AppKey = appKey, UserName = username }; return View(viewModel); } //授權登入 [HttpPost] public ActionResult Index(PassportLoginRequest model) { //擷取應用資訊 var appInfo = _appInfoService.Get(model.AppKey); if (appInfo == null) { //應用不存在 return View(model); } TempData[AppInfo] = appInfo; if (ModelState.IsValid == false) { //實體驗證失敗 return View(model); } //過濾欄位無效字元 model.Trim(); //擷取使用者資訊 var userInfo = _appUserService.Get(model.UserName); if (userInfo == null) { //使用者不存在 return View(model); } if (userInfo.UserPwd != model.Password.ToMd5()) { //密碼不正確 return View(model); } //擷取當前未到期的Session var currentSession = _authSessionService.ExistsByValid(appInfo.AppKey, userInfo.UserName); if (currentSession == null) { //構建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 }; //建立Session _authSessionService.Create(currentSession); } else { //延長有效期間,預設一年 _authSessionService.ExtendValid(currentSession.SessionKey); } //記錄使用者授權日誌 _userAuthOperateService.Create(new UserAuthOperate { CreateTime = DateTime.Now, IpAddress = Request.UserHostAddress, Remark = string.Format("{0} 登入 {1} 授權成功", currentSession.UserName, appInfo.Title), SessionKey = currentSession.SessionKey }); 104 var redirectUrl = string.Format("{0}?SessionKey={1}&SessionUserName={2}", appInfo.ReturnUrl, currentSession.SessionKey, userInfo.UserName); //跳轉預設回調頁面 return Redirect(redirectUrl); } }Memcached會話標識驗證核心代碼: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)); } }
樣本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:
從草稿範例程式碼中可以看到代碼效能上還有很多最佳化的地方,還有SSO應用授權登陸頁面的使用者帳號不存在、密碼錯誤等一系列的提示資訊等。在業務代碼運行基本正確的後期,可以考慮往更多的安全性層面最佳化,比如啟用AppSecret私密金鑰簽名驗證,IP範圍驗證,固定會話請求攻擊、SSO授權登陸介面的驗證碼、會話緩衝自動重建、SSo伺服器、緩衝的水平擴充等。