若要在收到 ASP.NET 應用程序中每個頁的每個請求時模擬 Microsoft Internet 信息服務 (IIS) 身份驗證用戶，必須在此應用程序的 Web.config 文件中包含 <identity> 標記，并將 impersonate 屬性設置為 true。例如：

<identity impersonate="true" />

四、為 ASP.NET 應用程序的所有請求模擬特定用戶

若要為 ASP.NET 應用程序的所有頁面上的所有請求模擬特定用戶，可以在該應用程序的 Web.config 文件的 <identity> 標記中指定 userName 和 password 屬性。例如：

<identity impersonate="true" userName="accountname" password="password" />

五、在代碼中模擬身份驗證用戶

若要僅在運行代碼的特定部分時模擬身份驗證用戶 (User.Identity)，您可以使用以下代碼。此方法要求身份驗證用戶標識的類型為 WindowsIdentity。

WindowsImpersonationContext impersonationContext =  ((WindowsIdentity)User.Identity).Impersonate();

//Insert your code that runs under the security context of the authenticating user here.

impersonationContext.Undo();

六、在代碼中模擬特定用戶

若要僅在運行代碼的特定部分時模擬特定用戶，請使用以下代碼(使用Windows API)：

<%@ Page Language="C#"%>
<%@ Import Namespace = "System.Web" %>
<%@ Import Namespace = "System.Web.Security" %>
<%@ Import Namespace = "System.Security.Principal" %>
<%@ Import Namespace = "System.Runtime.InteropServices" %>

<script runat=server>
public const int LOGON32_LOGON_INTERACTIVE = 2;
public const int LOGON32_PROVIDER_DEFAULT = 0;

WindowsImpersonationContext impersonationContext; 

[DllImport("advapi32.dll")]
public static extern int LogonUserA(String lpszUserName, 
    String lpszDomain,
    String lpszPassword,
    int dwLogonType, 
    int dwLogonProvider,
    ref IntPtr phToken);
[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public static extern int DuplicateToken(IntPtr hToken, 
    int impersonationLevel,  
    ref IntPtr hNewToken);
                          
[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public static extern bool RevertToSelf();

[DllImport("kernel32.dll", CharSet=CharSet.Auto)]
public static extern  bool CloseHandle(IntPtr handle);

public void Page_Load(Object s, EventArgs e)
{
    if(impersonateValidUser("username", "domain", "password"))
    {
        //Insert your code that runs under the security context of a specific user here.
        undoImpersonation();
    }
    else
    {
        //Your impersonation failed. Therefore, include a fail-safe mechanism here.
    }
}

private bool impersonateValidUser(String userName, String domain, String password)
{
    WindowsIdentity tempWindowsIdentity;
    IntPtr token = IntPtr.Zero;
    IntPtr tokenDuplicate = IntPtr.Zero;

    if(RevertToSelf())
    {
        if(LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE, 
            LOGON32_PROVIDER_DEFAULT, ref token) != 0)
        {
            if(DuplicateToken(token, 2, ref tokenDuplicate) != 0) 
            {
                tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
                impersonationContext = tempWindowsIdentity.Impersonate();
                if (impersonationContext != null)
                {
                    CloseHandle(token);
                    CloseHandle(tokenDuplicate);
                    return true;
                }
            }
        } 
    }
    if(token!= IntPtr.Zero)
        CloseHandle(token);
    if(tokenDuplicate!=IntPtr.Zero)
        CloseHandle(tokenDuplicate);
    return false;
}

private void undoImpersonation()
{
    impersonationContext.Undo();
}

到此這篇關于ASP.Net使用System.Security.Principal模擬用戶的文章就介紹到這了。希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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