public static Impersonator Impersonate(
string userName, string domain, string password,
ImpersonatorLogonType logonType = ImpersonatorLogonType.InteractiveLogon)
{
var imp = new Impersonator(userName, domain, password, logonType);
imp.Impersonate(imp.logonTyp);
return(imp);
}
public Impersonator(string UserName,
string Domain, string Password,
ImpersonatorLogonType logonType
= ImpersonatorLogonType.InteractiveLogon)
{
username = UserName;
domain = Domain;
password = Password;
logonTyp = logonType;
}
private WindowsIdentity Logon(ImpersonatorLogonType logonType)
{
var handle = IntPtr.Zero;
const int LOGON32_PROVIDER_DEFAULT = 0;
const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
const int LOGON32_PROVIDER_WINNT50 = 5;
const int SecurityImpersonation = 2;
// attempt to authenticate domain user account
try
{
if (!LogonUser(username, domain,
password, (int)logonType,
LOGON32_PROVIDER_DEFAULT, ref handle))
{
throw new LogonException(
"User logon failed. GetLastWin32Error Number: " +
Marshal.GetLastWin32Error());
}
// ----------------------------------
var dupHandle = IntPtr.Zero;
if (!DuplicateToken(handle,
SecurityImpersonation,
ref dupHandle))
{
throw new LogonException(
"Logon failed attemting to duplicate handle");
}
// Logon Succeeded ! return new WindowsIdentity instance
return(new WindowsIdentity(handle));
}
// close the open handle to the authenticated account
finally { CloseHandle(handle); }
}
public void Impersonate(ImpersonatorLogonType logonType = ImpersonatorLogonType.InteractiveLogon)
{
impersonationContext = Logon(logonType).Impersonate();
}
