我不知道这是否适用于 WCF。但是我们在我们的生产网络应用程序中使用它来模拟读取和写入文件到文件系统。您需要为 AdvApi32.LogonUser、AdvApi32.DuplicateToken 和 Kernel32.CloseHandle 定义 API,并确保在完成后关闭 WindowsImpersonationContext。
/// <summary>impersonates a user</summary>
/// <param name="username">domain\name of the user account</param>
/// <param name="password">the user's password</param>
/// <returns>the new WindowsImpersonationContext</returns>
public static WindowsImpersonationContext ImpersonateUser(String username, String password)
{
WindowsIdentity winId = WindowsIdentity.GetCurrent();
if (winId != null)
{
if (string.Compare(winId.Name, username, true) == 0)
{
return null;
}
}
//define the handles
IntPtr existingTokenHandle = IntPtr.Zero;
IntPtr duplicateTokenHandle = IntPtr.Zero;
String domain;
if (username.IndexOf("\\") > 0)
{
//split domain and name
String[] splitUserName = username.Split('\\');
domain = splitUserName[0];
username = splitUserName[1];
}
else
{
domain = String.Empty;
}
try
{
//get a security token
bool isOkay = AdvApi32.LogonUser(username, domain, password,
(int) AdvApi32.LogonTypes.LOGON32_LOGON_INTERACTIVE,
(int) AdvApi32.LogonTypes.LOGON32_PROVIDER_DEFAULT,
ref existingTokenHandle);
if (!isOkay)
{
int lastWin32Error = Marshal.GetLastWin32Error();
int lastError = Kernel32.GetLastError();
throw new Exception("LogonUser Failed: " + lastWin32Error + " - " + lastError);
}
// copy the token
isOkay = AdvApi32.DuplicateToken(existingTokenHandle,
(int) AdvApi32.SecurityImpersonationLevel.SecurityImpersonation,
ref duplicateTokenHandle);
if (!isOkay)
{
int lastWin32Error = Marshal.GetLastWin32Error();
int lastError = Kernel32.GetLastError();
Kernel32.CloseHandle(existingTokenHandle);
throw new Exception("DuplicateToken Failed: " + lastWin32Error + " - " + lastError);
}
// create an identity from the token
WindowsIdentity newId = new WindowsIdentity(duplicateTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();
return impersonatedUser;
}
finally
{
//free all handles
if (existingTokenHandle != IntPtr.Zero)
{
Kernel32.CloseHandle(existingTokenHandle);
}
if (duplicateTokenHandle != IntPtr.Zero)
{
Kernel32.CloseHandle(duplicateTokenHandle);
}
}
}