WindowsIdentity.RunImpersonated 方法

参考

定义

命名空间:: System.Security.Principal

程序集:: System.Security.Principal.Windows.dll

程序集:: mscorlib.dll

包:: System.Security.Principal.Windows v5.0.0

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

重载

RunImpersonated(SafeAccessTokenHandle, Action)	作为模拟 Windows 标识运行指定操作。可以使用 RunImpersonated(SafeAccessTokenHandle, Action) 并直接作为参数提供函数，而不是使用模拟方法调用并在 WindowsImpersonationContext 中运行函数。
RunImpersonated<T>(SafeAccessTokenHandle, Func<T>)	作为模拟 Windows 标识运行指定函数。可以使用 RunImpersonated(SafeAccessTokenHandle, Action) 并直接作为参数提供函数，而不是使用模拟方法调用并在 WindowsImpersonationContext 中运行函数。

RunImpersonated(SafeAccessTokenHandle, Action)

作为模拟 Windows 标识运行指定操作。可以使用 RunImpersonated(SafeAccessTokenHandle, Action) 并直接作为参数提供函数，而不是使用模拟方法调用并在 WindowsImpersonationContext 中运行函数。

public:
 static void RunImpersonated(Microsoft::Win32::SafeHandles::SafeAccessTokenHandle ^ safeAccessTokenHandle, Action ^ action);

public static void RunImpersonated (Microsoft.Win32.SafeHandles.SafeAccessTokenHandle safeAccessTokenHandle, Action action);

static member RunImpersonated : Microsoft.Win32.SafeHandles.SafeAccessTokenHandle * Action -> unit

Public Shared Sub RunImpersonated (safeAccessTokenHandle As SafeAccessTokenHandle, action As Action)

参数

safeAccessTokenHandle: SafeAccessTokenHandle

模拟 Windows 标识 SafeAccessTokenHandle。

action: Action

要运行的 System.Action。

示例

下面的示例演示如何使用 WindowsIdentity 类来模拟用户。

警告

此示例要求用户在控制台屏幕上输入密码。密码将在屏幕上可见，因为控制台窗口本身不支持掩码输入。

// The following example demonstrates the use of the WindowsIdentity class to impersonate a user.
// IMPORTANT NOTE:
// This sample asks the user to enter a password on the console screen.
// The password will be visible on the screen, because the console window
// does not support masked input natively.

using System;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Principal;
using Microsoft.Win32.SafeHandles;

public class ImpersonationDemo
{
    [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
        int dwLogonType, int dwLogonProvider, out SafeAccessTokenHandle phToken);

    public static void Main()
    {
        // Get the user token for the specified user, domain, and password using the
        // unmanaged LogonUser method.
        // The local machine name can be used for the domain name to impersonate a user on this machine.
        Console.Write("Enter the name of the domain on which to log on: ");
        string domainName = Console.ReadLine();

        Console.Write("Enter the login of a user on {0} that you wish to impersonate: ", domainName);
        string userName = Console.ReadLine();

        Console.Write("Enter the password for {0}: ", userName);

        const int LOGON32_PROVIDER_DEFAULT = 0;
        //This parameter causes LogonUser to create a primary token.
        const int LOGON32_LOGON_INTERACTIVE = 2;

        // Call LogonUser to obtain a handle to an access token.
        SafeAccessTokenHandle safeAccessTokenHandle;
        bool returnValue = LogonUser(userName, domainName, Console.ReadLine(),
            LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT,
            out safeAccessTokenHandle);

        if (false == returnValue)
        {
            int ret = Marshal.GetLastWin32Error();
            Console.WriteLine("LogonUser failed with error code : {0}", ret);
            throw new System.ComponentModel.Win32Exception(ret);
        }

        Console.WriteLine("Did LogonUser Succeed? " + (returnValue ? "Yes" : "No"));
        // Check the identity.
        Console.WriteLine("Before impersonation: " + WindowsIdentity.GetCurrent().Name);

        // Note: if you want to run as unimpersonated, pass
        //       'SafeAccessTokenHandle.InvalidHandle' instead of variable 'safeAccessTokenHandle'
        WindowsIdentity.RunImpersonated(
            safeAccessTokenHandle,
            // User action
            () =>
            {
                // Check the identity.
                Console.WriteLine("During impersonation: " + WindowsIdentity.GetCurrent().Name);
            }
            );

        // Check the identity again.
        Console.WriteLine("After impersonation: " + WindowsIdentity.GetCurrent().Name);
    }
}

注解

注意

此方法可以可靠地与 async/await 模式一起使用，这与不同 Impersonate。在异步方法中，此方法的泛型重载可以与异步委托参数一起使用，以便可以等待生成的任务。

适用于

RunImpersonated<T>(SafeAccessTokenHandle, Func<T>)

作为模拟 Windows 标识运行指定函数。可以使用 RunImpersonated(SafeAccessTokenHandle, Action) 并直接作为参数提供函数，而不是使用模拟方法调用并在 WindowsImpersonationContext 中运行函数。

public:
generic <typename T>
 static T RunImpersonated(Microsoft::Win32::SafeHandles::SafeAccessTokenHandle ^ safeAccessTokenHandle, Func<T> ^ func);

public static T RunImpersonated<T> (Microsoft.Win32.SafeHandles.SafeAccessTokenHandle safeAccessTokenHandle, Func<T> func);

static member RunImpersonated : Microsoft.Win32.SafeHandles.SafeAccessTokenHandle * Func<'T> -> 'T

Public Shared Function RunImpersonated(Of T) (safeAccessTokenHandle As SafeAccessTokenHandle, func As Func(Of T)) As T

类型参数

T

函数使用并返回的对象的类型。

参数

safeAccessTokenHandle: SafeAccessTokenHandle

模拟 Windows 标识 SafeAccessTokenHandle。

func: Func<T>

要运行的 System.Func。

函数的结果。

示例