这是来自http://support.microsoft.com/kb/306158
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);
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();
}