为什么我的表单身份验证票证到期如此之快？

Question

我在ASP.NET应用程序中使用表单身份验证.我将其配置FormsAuthenticationTicket为在1年后到期,但实际上在1小时左右后到期.我无法弄清楚为什么.

以下是登录过程中涉及的所有代码:

public static bool Login(int id)
{
    try
    {
        string securityToken = UserHelper.AuthenticateUser(id);

        DateTime expiryDate = DateTime.Now.AddYears(1);
        FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
             1, id.ToString(), DateTime.Now, expiryDate, true,
             securityToken, FormsAuthentication.FormsCookiePath);

        string encryptedTicket = FormsAuthentication.Encrypt(ticket);
        HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
        cookie.Expires = expiryDate;

        HttpContext.Current.Response.Cookies.Add(cookie);

        return true;
    }
    catch
    {
        return false;
    }
}

Web.config文件:

<system.web>
    <machineKey validationKey="AutoGenerate"
    decryptionKey="AutoGenerate" validation="SHA1" />
    <compilation debug="true">
    <authentication mode="Forms">
        <forms loginUrl="~/Login.aspx" timeout="2880"/>
    </authentication>
...

我的方法有问题吗？为什么到期如此之快？

编辑

Global.asax代码:

protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
    if (Request.PhysicalPath.EndsWith(".aspx") || Request.PhysicalPath.EndsWith(".axd") || Request.PhysicalPath.EndsWith(".ashx"))
        SecurityManager.SetPrincipal();
}

SetPrincipal代码:

public static void SetPrincipal()
{
    ILivrePrincipal principal = null;
    FormsIdentity identity;
    UrlParameters urlParameters = UrlParametersHelper.GetUrlParameters(HttpContext.Current.Request);

    if (HttpContext.Current.Request.IsAuthenticated)
    {
        identity = (FormsIdentity)HttpContext.Current.User.Identity;

        User userProfile;
        urlParameters.SecurityToken = (((FormsIdentity)identity).Ticket).UserData;
        try
        {
            userProfile = UserHelper.GetUser(urlParameters.SecurityToken);
            UserHelper.UpdateLastActiveOn(userProfile);
            principal = new AuthenticatedPrincipal(identity, userProfile);
        }
        catch
        {
            //TODO: Log an exception
            FormsAuthentication.SignOut();
            principal = new AnonymousPrincipal(new GuestIdentity(), UserHelper.GetUser(null));
        }
    }
    else
    {
        principal = new AnonymousPrincipal(new GuestIdentity(), UserHelper.GetUser(null));
    }

    HttpContext.Current.User = principal;
}

Answer 1

这是你的问题.

<machineKey validationKey="AutoGenerate" 
            decryptionKey="AutoGenerate" 
            validation="SHA1"/>

每次应用程序池回收时,ASP都会生成一个新的机器密钥.每小时都可能发生这种情况.

机器密钥用于加密和解密FormsAuthentication cookie.如果它发生变化,浏览器上的cookie就不再有用了.因此,系统会将您视为从未登录过.

尝试生成静态密钥并将其添加到配置文件中.应该看起来像这样:

<machineKey  
    validationKey="21F090935F6E49C2C797F69(snip)F1B72A7F0A281B"          
    decryptionKey="ABAA84D7EC4BB56D75D(snip)B8BF91CFCD64568A145BE59719F"
    validation="SHA1"
    decryption="AES"
/>

在这里生成一把钥匙.