我该如何暂时模拟用户打开一个文件?
-
22-08-2019 - |
题
我想暂时模拟域用户帐户中从ASP.NET站点的网络驱动器上的文件中读取。
我宁愿不设置模拟整个站点或设置服务器上的映射的驱动器。
解决方案
我最终使用从米希尔面包车Otegem代码:WindowsImpersonationContext轻松并加入了IDisposable的实现。我发现这个在有关在ASP.NET 的模拟另一个问题。
用法:
using (WindowsImpersonationContextFacade impersonationContext
= new WindowsImpersonationContextFacade(
Settings.Default.ImpersonationDomain,
Settings.Default.ImpersonationUser,
Settings.Default.ImpersonationPass))
{
transactions = TransactionLoader.Load(filePath);
}
代码:
using System;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;
using System.ComponentModel;
namespace MyNamespace
{
public class WindowsImpersonationContextFacade : IDisposable
{
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool LogonUser(String lpszUsername, String lpszDomain,
String lpszPassword, int dwLogonType, int dwLogonProvider,
ref IntPtr phToken);
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern bool CloseHandle(IntPtr handle);
private const int LOGON32_PROVIDER_DEFAULT = 0;
private const int LOGON32_LOGON_INTERACTIVE = 2;
private string m_Domain;
private string m_Password;
private string m_Username;
private IntPtr m_Token;
private WindowsImpersonationContext m_Context = null;
protected bool IsInContext
{
get { return m_Context != null; }
}
public WindowsImpersonationContextFacade(string domain, string username, string password)
{
m_Domain = domain;
m_Username = username;
m_Password = password;
Enter();
}
[PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
private void Enter()
{
if (this.IsInContext) return;
m_Token = IntPtr.Zero;
bool logonSuccessfull = LogonUser(
m_Username,
m_Domain,
m_Password,
LOGON32_LOGON_INTERACTIVE,
LOGON32_PROVIDER_DEFAULT,
ref m_Token);
if (logonSuccessfull == false)
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error);
}
WindowsIdentity identity = new WindowsIdentity(m_Token);
m_Context = identity.Impersonate();
}
[PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
private void Leave()
{
if (this.IsInContext == false) return;
m_Context.Undo();
if (m_Token != IntPtr.Zero) CloseHandle(m_Token);
m_Context = null;
}
public void Dispose()
{
Leave();
}
}
}
其他提示
实际上,该过程是很容易的,可以使用这样的代码;
using System.Security.Principal;
...
// Obtain the authenticated user's Identity
WindowsIdentity winId = (WindowsIdentity)HttpContext.Current.User.Identity;
WindowsImpersonationContext ctx = null;
try
{
// Start impersonating
ctx = winId.Impersonate();
// Now impersonating
// Access resources using the identity of the authenticated user
}
// Prevent exceptions from propagating
catch
{
}
finally
{
// Revert impersonation
if (ctx != null)
ctx.Undo();
}
// Back to running under the default ASP.NET process identity
您的代码变为“立即冒充”部分。关键是finally块,这是非常重要的。您可以查看此 MSDN 文章为如何工作的全部细节。
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