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Monday, 06 October 2008
Nou, had een mooie break...nu voor sommige code, dit zal u 'impersoneren' een gebruiker - echt handig wanneer, bijvoorbeeld, proberen om een bestand te uploaden naar een netwerk locatie ... zoals gewoonlijk, geen idee waar ik vond dit, als het was u, laat het me weten!
using System;
using System.Web;
using System.Web.Security;
using System.Security.Principal;
using System.Runtime.InteropServices;
namespace Components.Security
{
///
/// Summary description for ImpersonateUser.
///
public class ImpersonateUser
{
public const int LOGON32_LOGON_INTERACTIVE = 2;
public const int LOGON32_PROVIDER_DEFAULT = 0;
WindowsImpersonationContext impersonationContext;
[DllImport("advapi32.dll", CharSet = CharSet.Auto)]
public static extern int LogonUser( string lpszUserUname,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken);
[DllImport("advapi32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, SetLastError=true)]
public extern static int DuplicateToken(IntPtr hToken,
int impersonationLevel,
ref IntPtr hNewToken);
public bool impersonateValidUser(string userName, string domain, string password)
{
WindowsIdentity tempWindowsIdentity;
IntPtr token = IntPtr.Zero;
IntPtr tokenDuplicate = IntPtr.Zero;
if(LogonUser(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();
return (impersonationContext != null);
}
else
{
return false;
}
}
else
{
return false;
}
}
public void undoImpersonation()
{
impersonationContext.Undo();
}
}
}
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