Question

windows 2000 get current user name and check password

Asked by: BangorCC

I need to retrieve the current user name from windows and then have them enter their password and check it against their windows password

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Asked On
2003-12-31 at 10:31:55ID20838156
Tags

current

,

user

,

windows

,

get

,

password

Topic

.NET

Participating Experts
3
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Comments
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Answers

 

by: ghornetPosted on 2003-12-31 at 10:39:10ID: 10022820

Current user name can be found using Dim uname as string = User.Identity.Name.Substring(InStr(User.Identity.Name, "\")) if they are in your domain. As far as checking password I don't know, have to play with LDAP.

 

by: vascovPosted on 2003-12-31 at 11:06:29ID: 10022959

Hi, you can try something like:


using System.Runtime.InteropServices;

[DllImport("KERNEL32.DLL", EntryPoint="CloseHandle", SetLastError=true )]
public static extern bool CloseHandle( int hObject );

[DllImport("ADVAPI32.DLL", EntryPoint="LogonUserW", SetLastError=true, CharSet=CharSet.Unicode)]
public static extern bool LogonUser( string Username, string Domain, string Password, int dwLogonType, int dwLogonProvider, out int hToken );

and then in code, something like:

int hToken = 0;
try
{
      if ( LogonUser( txtUsername.Text, txtDomain.Text, txtDomain.Text, 3, 0, out hToken ) )
            MessageBox.Show( "oki" );
      else
            MessageBox.Show( "Noki" );
}
finally
{
      CloseHandle( hToken );
}


hth,

Vasco

 

by: Mikal613Posted on 2003-12-31 at 11:07:20ID: 10022964

HOWTO article on MSDN,

HOWTO: Validate User Credentials on Microsoft Operating Systems
http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/Q180548.ASP&NoWebContent=1


equivalent VB code you can get it here,

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=21391&lngWId=1

you can either convert the vb code to vb.net or make dll in vb and use it in vb.net.

 

by: vascovPosted on 2003-12-31 at 11:15:15ID: 10022997

It should be

     if ( LogonUser( txtUsername.Text, txtDomain.Text, txtPassword.Text, 3, 0, out hToken ) )

(the third parameter was repeated)

Next time i'll copy/paste from some working sample, and not type it directly :)

hth,

Vasco

20120131-EE-VQP-002

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