通過ASP.net程式建立域帳戶故障

類比 IIS 驗證的帳戶或使用者

若要在收到 ASP.NET 應用程式中每個頁的每個請求時類比 Microsoft Internet 資訊服務 (IIS) 身分識別驗證使用者，必須在此應用程式的 Web.config 檔案中包含 <identity> 標記，並將 impersonate 屬性設定為 true。例如：

<identity impersonate="true" />

為 ASP.NET 應用程式的所有請求類比特定使用者

若要為 ASP.NET 應用程式的所有頁面上的所有請求類比特定使用者，可以在該應用程式的 Web.config 檔案的 <identity> 標記中指定 userName 和 password 屬性。例如：

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

注意：線上程上類比特定使用者的進程的標識必須具有“作為作業系統的一部分”許可權。預設情況下，Aspnet_wp.exe 進程在名為 ASPNET 的電腦帳戶下運行。不過，此帳戶沒有類比特定使用者所需的許可權。如果您嘗試類比特定使用者，則會出現一條錯誤資訊。

要解決此問題，請使用下列方法之一：

•

為 ASPNET 帳戶（許可權最低的帳戶）授予“作為作業系統的一部分”許可權。

注意：雖然此方法可以解決問題，但 Microsoft 不建議使用此方法。

•

在 Machine.config 檔案的 <processModel> 配置部分中，將運行 Aspnet_wp.exe 進程所使用的帳戶更改為 System 帳戶。

在代碼中類比身分識別驗證使用者

若要僅在運行代碼特定部分時類比身分識別驗證使用者 (User.Identity)，您可以使用以下代碼。此方法要求身分識別驗證使用者標識的類型為 WindowsIdentity。

Visual Basic .NET

Dim impersonationContext As System.Security.Principal.WindowsImpersonationContext
Dim currentWindowsIdentity As System.Security.Principal.WindowsIdentity
currentWindowsIdentity = CType(User.Identity, System.Security.Principal.WindowsIdentity)
impersonationContext = currentWindowsIdentity.Impersonate()
'Insert your code that runs under the security context of the authenticating user here.
impersonationContext.Undo()

Visual C# .NET

System.Security.Principal.WindowsImpersonationContext impersonationContext;
impersonationContext =
((System.Security.Principal.WindowsIdentity)User.Identity).Impersonate();
//Insert your code that runs under the security context of the authenticating user here.
impersonationContext.Undo();

Visual J# .NET

System.Security.Principal.WindowsImpersonationContext impersonationContext;
impersonationContext =
((System.Security.Principal.WindowsIdentity)get_User().get_Identity()).Impersonate();
//Insert your code that runs under the security context of the authenticating user here.
impersonationContext.Undo();

在代碼中類比特定使用者

若要僅在運行代碼特定部分時類比特定使用者，請使用以下代碼：

Visual Basic .NET

<%@ Page Language="VB" %>
<%@ Import Namespace = "System.Web" %>
<%@ Import Namespace = "System.Web.Security" %>
<%@ Import Namespace = "System.Security.Principal" %>
<%@ Import Namespace = "System.Runtime.InteropServices" %>
<script runat=server>
Dim LOGON32_LOGON_INTERACTIVE As Integer = 2
Dim LOGON32_PROVIDER_DEFAULT As Integer = 0
Dim impersonationContext As WindowsImpersonationContext
Declare Function LogonUserA Lib "advapi32.dll" (ByVal lpszUsername As String, _
ByVal lpszDomain As String, _
ByVal lpszPassword As String, _
ByVal dwLogonType As Integer, _
ByVal dwLogonProvider As Integer, _
ByRef phToken As IntPtr) As Integer
Declare Auto Function DuplicateToken Lib "advapi32.dll" ( _
ByVal ExistingTokenHandle As IntPtr, _
ByVal ImpersonationLevel As Integer, _
ByRef DuplicateTokenHandle As IntPtr) As Integer
Declare Auto Function RevertToSelf Lib "advapi32.dll" () As Long
Declare Auto Function CloseHandle Lib "kernel32.dll" (ByVal handle As IntPtr) As Long
Public Sub Page_Load(ByVal s As Object, ByVal e As EventArgs)
If impersonateValidUser("username", "domain", "password") Then
'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.
End If
End Sub
Private Function impersonateValidUser(ByVal userName As String, _
ByVal domain As String, ByVal password As String) As Boolean
Dim tempWindowsIdentity As WindowsIdentity
Dim token As IntPtr = IntPtr.Zero
Dim tokenDuplicate As IntPtr = IntPtr.Zero
impersonateValidUser = False
If RevertToSelf() Then
If LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE,
LOGON32_PROVIDER_DEFAULT, token) <> 0 Then
If DuplicateToken(token, 2, tokenDuplicate) <> 0 Then
tempWindowsIdentity = New WindowsIdentity(tokenDuplicate)
impersonationContext = tempWindowsIdentity.Impersonate()
If Not impersonationContext Is Nothing Then
impersonateValidUser = True
End If
End If
End If
End If
If Not tokenDuplicate.Equals(IntPtr.Zero) Then
CloseHandle(tokenDuplicate)
End If
If Not token.Equals(IntPtr.Zero) Then
CloseHandle(token)
End If
End Function
Private Sub undoImpersonation()
impersonationContext.Undo()
End Sub
</script>

Visual C# .NET

<%@ 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();
}
</script>

Visual J# .NET

<%@ Page language="VJ#" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Web.Security" %>
<%@ Import Namespace="System.Security.Principal" %>
<%@ Import Namespace="System.Runtime.InteropServices" %>
<script runat=server>
public static int LOGON32_LOGON_INTERACTIVE = 2;
public static int LOGON32_PROVIDER_DEFAULT = 0;
WindowsImpersonationContext impersonationContext;
/** @attribute DllImport("advapi32.dll") */
public static native int LogonUserA(String lpszUserName,
String lpszDomain,
String lpszPassword,
int dwLogonType,
int dwLogonProvider,
System.IntPtr[] phToken);
/** @attribute DllImport("advapi32.dll",
CharSet=CharSet.Auto, SetLastError=true) */
public static native int DuplicateToken(System.IntPtr hToken,
int impersonationLevel,
System.IntPtr[] hNewToken);
/** @attribute DllImport("kernel32.dll",CharSet=CharSet.Auto) */
public static native boolean CloseHandle(System.IntPtr[] handle);
/** @attribute DllImport("advapi32.dll",
CharSet=CharSet.Auto,SetLastError=true) */
public static native boolean RevertToSelf();
public void Page_Load(Object s, System.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 boolean impersonateValidUser(String userName, String domain, String password)
{
WindowsIdentity tempWindowsIdentity;
System.IntPtr[] token = new System.IntPtr[1];
System.IntPtr[] tokenDuplicate = new System.IntPtr[1];
if(RevertToSelf())
{
if(LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE,
LOGON32_PROVIDER_DEFAULT, token) != 0)
{
if(DuplicateToken(token[0], 2, tokenDuplicate) != 0)
{
tempWindowsIdentity = new WindowsIdentity(tokenDuplicate[0]);
impersonationContext = tempWindowsIdentity.Impersonate();
if (impersonationContext != null)
{
CloseHandle(tokenDuplicate);
CloseHandle(token);
return true;
}
}
}
}
if(!token[0].Equals(System.IntPtr.Zero))
CloseHandle(token);
if(!tokenDuplicate[0].Equals(System.IntPtr.Zero))
CloseHandle(tokenDuplicate);
return false;
}
private void undoImpersonation()
{
impersonationContext.Undo();
}
</script>

注意：線上程上類比特定使用者的進程的標識必須具有“作為作業系統的一部分”許可權。預設情況下，Aspnet_wp.exe 進程在名為 ASPNET 的電腦帳戶下運行。不過，此帳戶沒有類比特定使用者所需的許可權。如果您嘗試類比特定使用者，則會出現一條錯誤資訊。

要解決此問題，請使用下列方法之一：

•

為 ASPNET 帳戶授予“作為作業系統的一部分”許可權。

•

在 Machine.config 檔案的 <processModel> 配置部分中，將運行 Aspnet_wp.exe 進程所使用的帳戶更改為 System 帳戶。