4

我目前正在研究 asp.net 中标准页面授权配置的替代解决方案。

如果您有需要相同访问策略的文件目录,则位置标签可以正常工作,但如果您有很多单独的访问策略,则位置标签很麻烦。我可以推出自己的自定义身份验证系统,但如果可以避免,那可能会更好。

目前,我们正在为页面内容使用类似 azman 的基于权限的授权系统,但我还没有找到一种将其与标准页面安全性集成的好方法。

关于如何做到这一点的任何建议?有没有集成 azman 和 asp.net 页面授权的解决方案?还有其他我应该注意的标准解决方案吗?

4

3 回答 3

6

我在一个巨大的应用程序中做了很多不同的权限和不同的角色,如下所示[我这里没有代码,所以我将尝试在这里重新创建它]:

我首先实现了一个名为 SecuredPage 的类,如下所示:


public class SecuredPage : System.Web.UI.Page
{
    // Those Permissions are mandatory, so user needs to have all of them
    public List MandatoryPermissions { get; set; }

    // Those Permissions are optional, so if the user have at least one of them, he can access
    public List OptionalPermissions { get; set; }

    protected override void OnLoad(EventArgs e)
    {
        MyUser loggedUser = (MyUser) this.User;

        base.OnLoad(e);

        foreach (Permission mandatoryPermission in MandatoryPermissions)
        {
            // if the user don't have permission, we can redirect him
            if (!loggedUser.HasPermission(mandatoryPermission))
            {
                RedirectToDontHaveAccess();
                break;
            }
        }

        bool hasAccessToThePage = false;

        foreach (Permission optionalPermission in OptionalPermissions)
        {
            // If the user has at least one of the permissions, he can access
            if (loggedUser.HasPermission(optionalPermission))
            {
                hasAccessToThePage = true;
            }
        }

        if (!hasAccessToThePage)
        {
            RedirectToDontHaveAccess();
        }

    }

    private void RedirectToDontHaveAccess()
    {
        throw new NotImplementedException();
    }
}

对于用户需要访问权限的所有页面,这将是我的 BasePage。MandatoryPermissions用户必须拥有所有这些权限才能访问该页面,并且是OptionalPermissions用户至少需要其中一个才能访问该页面的权限。没有必要在每个页面上都使用两者,因为如果你有MandatoryPermissions选项,是否有选项都没有关系。

权限是一个枚举:


public enum Permission
{
    // Usually this enum will replicate a domain table from the database
    EditUser = 1,
    SearchUserByUsername = 2,
    SearchUserByEmail = 3

}

并且MyUserMembershipUser


public class MyUser : System.Web.Security.MembershipUser
{
    internal bool HasPermission(Permission permission)
    {
        //
        // TODO: Check on database if the user has the permission or not
        //
    }
}

然后,您需要在页面中做的唯一一件事就是填充权限列表:


public partial class EditUser : SecuredPage
{
    protected void Page_Load(object sender, EventArgs e)
    {
        MandatoryPermissions.Add(Permission.EditUser);
    }
}

public partial class SearchUser : SecuredPage
{
    protected void Page_Load(object sender, EventArgs e)
    {
        OptionalPermissions.Add(Permission.SearchUserByUsername);
        OptionalPermissions.Add(Permission.SearchUserByEmail);
    }
}

好的,搜索示例不是那么好,但我想你明白了。

整个想法是base.OnLoad(e);在权限验证之前调用,所以你只需要在你的Page_Load.

我不确定这是否是最好的解决方案,但我相信它有很大帮助:)

于 2009-04-25T03:52:24.613 回答
1

如何将页面映射到数据库中的角色,然后让您的母版页在页面加载时检查数据库?

于 2009-07-08T11:05:38.887 回答
0

您是否在应用程序的 Application_AuthenticateRequest 方法期间设置了 GenericIdentity 和 IPrincipal 对象?

我们目前使用我们的域在 SQL Server 数据库上进行身份验证和用户组/角色以提供授权。在 Application_AuthenticateRequest 方法中,我收集所有这些数据并基于它创建一个 FormsAuthenticationTicket 对象。

通过这样做,我现在可以通过在我的代码中执行一个简单的 User.IsInRole("RoleX") 命令来访问用户的角色,这使我可以轻松地锁定/解锁用户控件,甚至可以执行一个简单的 Response.Redirect()如果他们没有适当的授权,则转到“授权错误”页面。

这是我的 AuthenticateRequest 方法的样子(VB.NET)

Sub Application_AuthenticateRequest(ByVal sender As Object, _
                                       ByVal e As EventArgs)

      Dim formsAuthTicket As FormsAuthenticationTicket
      Dim httpCook As HttpCookie
      Dim objGenericIdentity As GenericIdentity
      Dim objMyAppPrincipal As CustomPrincipal
      Dim strRoles As String()

      httpCook = Context.Request.Cookies.Get("authCookieEAF")
      formsAuthTicket = FormsAuthentication.Decrypt(httpCook.Value)
      objGenericIdentity = New GenericIdentity(formsAuthTicket.Name)
      strRoles = formsAuthTicket.UserData.Split("|"c)
      objMyAppPrincipal = New CustomPrincipal(objGenericIdentity, strRoles)
      HttpContext.Current.User = objMyAppPrincipal    

   End Sub

...同样,CustomPrincipal 对象如下所示:

Public Class CustomPrincipal
   Implements IPrincipal


   ''' <summary>
   '''    Identity object of user.
   ''' </summary>
   ''' <remarks></remarks>
   Private m_identity As IIdentity

   ''' <summary>
   '''    Roles(s) a user is a part of.
   ''' </summary>
   ''' <remarks></remarks>
   Private m_roles As String()

   ''' <summary>
   '''    Name of user.
   ''' </summary>
   ''' <remarks></remarks>
   Private m_userId As String

   ''' <summary>
   '''    Gets/Sets the user name.
   ''' </summary>
   ''' <value>m_userId</value>
   ''' <returns>Current name of user.</returns>
   ''' <remarks></remarks>
   Public Property UserId() As String
      Get
         Return m_userId
      End Get
      Set(ByVal value As String)
         m_userId = value
      End Set
   End Property

   ''' <summary>
   '''    Gets the identity object of the user.
   ''' </summary>
   ''' <value>m_identity</value>
   ''' <returns>Current identity of user.</returns>
   ''' <remarks></remarks>
   Public ReadOnly Property Identity() As System.Security.Principal.IIdentity Implements System.Security.Principal.IPrincipal.Identity
      Get
         Return m_identity
      End Get
   End Property

   ''' <summary>
   '''    Full constructor.
   ''' </summary>
   ''' <param name="identity">Identity to use with Custom Principal.</param>
   ''' <param name="roles">Roles for user.</param>
   ''' <remarks>Identity object contains user name when building constructor.</remarks>
   Public Sub New(ByVal identity As IIdentity, ByVal roles As String())

      m_identity = identity
      m_roles = New String(roles.Length) {}
      roles.CopyTo(m_roles, 0)
      Array.Sort(m_roles)
      m_userId = identity.Name

   End Sub

   ''' <summary>
   '''    Determines if the current user is in the role specified.
   ''' </summary>
   ''' <param name="role">Role to test against.</param>
   ''' <returns>Boolean variable indicating if role specified exists in user's m_roles array.</returns>
   ''' <remarks></remarks>
   Public Function IsInRole(ByVal role As String) As Boolean Implements System.Security.Principal.IPrincipal.IsInRole

      Dim boolResults As Boolean

      If Array.BinarySearch(m_roles, role) >= 0 Then
         boolResults = True
      Else
         boolResults = False
      End If

      Return boolResults

   End Function

End Class

希望这为您提供了将其塑造到您的环境中所需的东西。

于 2009-04-24T22:17:57.507 回答