这是 this 的扩展问题
我正在尝试将文件从本地用户的临时文件夹复制到远程文件共享。 我无权访问远程文件共享,所以我必须模拟一个有权限的用户。
现在,我可以成功地从远程服务器读取文件并将其复制到本地,但是我无法将本地文件写入共享,因为它给了我错误:
Access denied for the LOCAL file
(因为我现在正在冒充另一个用户)。
如果您需要一些代码,我可以发布。
最佳答案
设法找到答案,
我只需要在模拟远程用户之前为本地文件创建一个 FileStream
,然后将该 FileStream
传递给复制函数。
编辑: 所以这是我的整个文件复制例程
using System.Security.Principal;
using System.Security.Permissions;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.IO;
public class ImpersonatedFileCopy : IDisposable
{
#region Assembly Functions
[DllImport("advapi32.dll")]
public static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);
[DllImport("kernel32.dll")]
public static extern bool CloseHandle(IntPtr handle);
#endregion
#region Private Variables
private IntPtr _TokenHandle = new IntPtr(0);
private WindowsImpersonationContext _WindowsImpersonationContext;
#endregion
#region Constructors
public ImpersonatedFileCopy(string domain, string username, string password)
{
Impersonate(domain, username, password);
}
#endregion
#region Methods
[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
private void Impersonate(string domain, string username, string password)
{
bool returnValue;
try
{
const int LOGON32_PROVIDER_DEFAULT = 0;
const int LOGON32_LOGON_INTERACTIVE = 2;
_TokenHandle = IntPtr.Zero;
//Call LogonUser to obtain a handle to an access token.
returnValue = LogonUser(username, domain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, ref _TokenHandle);
if (returnValue)
{
WindowsIdentity newId = new WindowsIdentity(_TokenHandle);
_WindowsImpersonationContext = newId.Impersonate();
}
}
catch (Exception ex)
{
UndoImpersonate();
Debug.Writeline("Error"+ex.Message);
}
}
private void UndoImpersonate()
{
if (_WindowsImpersonationContext != null)
{
_WindowsImpersonationContext.Undo();
if (!_TokenHandle.Equals(IntPtr.Zero))
{
CloseHandle(_TokenHandle);
}
}
}
public bool PutFile(FileStream source, string destRemoteFilename, bool overwrite)
{
try
{
if (!Directory.Exists(Path.GetDirectoryName(destRemoteFilename))) Directory.CreateDirectory(Path.GetDirectoryName(destRemoteFilename));
using (FileStream dest = File.OpenWrite(destRemoteFilename))
{
source.Seek(0, SeekOrigin.Begin);
source.CopyTo(dest);
}
return true;
}
catch
{
return false;
}
}
public bool GetFile(string sourceRemoteFilename, FileStream dest, bool overwrite)
{
try
{
using (FileStream source = File.OpenRead(sourceRemoteFilename))
{
source.Seek(0, SeekOrigin.Begin);
source.CopyTo(dest);
}
return true;
}
catch
{
return false;
}
}
#endregion
#region IDisposable
public void Dispose()
{
UndoImpersonate();
GC.SuppressFinalize(this);
}
#endregion
}
以及用法:
using (FileStream dest = File.OpenWrite(localDestinationFilename))
using (copy = new ImpersonatedFileCopy(domain,user,pass))
{
success = copy.GetFile(remoteSourceFilename, dest, true);
}
关于c# - 将文件复制到我无权访问的网络共享,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11425041/