Current Login to another machine

[Stephen Yip via .NET 247]

Dear All,

I would like to perform a simple task by program (VB.Net or VC#.Net).

When a user logins the windows and try to run my program, how can I use his login information (username and password) to authenicate against another PC, e.g. using DirectoryEntry object?

I have these lines of code, but it needs the user to enter username and password in Textboxes txtUsername and txtPassword respectively. I would like to use the current login session information to do the job instead..
System.DirectoryServices.DirectoryEntry usr = new DirectoryEntry(entryPC.Path, txtUsername.Text, txtPassword.Text);
string strUserID;
try
{
strUserID = usr.NativeGuid;
MessageBox.Show("Login correct!");
}
catch
{
MessageBox.Show("Login Incorrect!");
}

Thanks for your help.
--------------------------------
From: Stephen Yip

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

<Id>EHsuCqGmSUa45Rjc8gxZLg==</Id>

[Willy Denoyette [MVP]]

You can't get the password from an authenticated logon session (thank God).
I'm not clear on why you want to authenticate an authenticated user on
another PC?

Willy.

"Stephen Yip via .NET 247" <an*******@dotnet247.com> wrote in message
news:u8**************@TK2MSFTNGP09.phx.gbl...

Dear All,

I would like to perform a simple task by program (VB.Net or VC#.Net).

When a user logins the windows and try to run my program, how can I use
his login information (username and password) to authenicate against
another PC, e.g. using DirectoryEntry object?

I have these lines of code, but it needs the user to enter username and
password in Textboxes txtUsername and txtPassword respectively. I would
like to use the current login session information to do the job instead..
System.DirectoryServices.DirectoryEntry usr = new
DirectoryEntry(entryPC.Path, txtUsername.Text, txtPassword.Text);
string strUserID;
try
{
strUserID = usr.NativeGuid;
MessageBox.Show("Login correct!");
}
catch
{
MessageBox.Show("Login Incorrect!");
}

Thanks for your help.
--------------------------------
From: Stephen Yip

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

<Id>EHsuCqGmSUa45Rjc8gxZLg==</Id>

[anonymous]

Hi,

You dont need to authenicate again to access "X" pc. You
can use current session and can access "X"(if you have
permissions).

IntPtr token = new IntPtr(0);
bool isValidUser = LogonUser(txtLoginName.Text,
txtDomain.Text, txtPassword.Text, (int)
LOGON32_LOGON_NETWORK, (int)LOGON32_PROVIDER_DEFAULT, ref
token);

if(isValidUser == false)
{

Msg.Text = "Wrong user
name or password<br>";
}
else
{
IntPtr token2 = new IntPtr
(token.ToInt32());
WindowsIdentity l_Wid =
new WindowsIdentity(token2);
WindowsPrincipal wp = new
WindowsPrincipal(l_Wid);

System.Threading.Thread.CurrentPrincipal = wp;

HttpContext.Current.User =
wp;
//////////////////////////
// Declare the logon types as constants
const long LOGON32_LOGON_INTERACTIVE = 2;
const long LOGON32_LOGON_NETWORK = 3;

// Declare the logon providers as constants
const long LOGON32_PROVIDER_DEFAULT = 0;
const long LOGON32_PROVIDER_WINNT50 = 3;
const long LOGON32_PROVIDER_WINNT40 = 2;
protected
System.Web.UI.WebControls.TextBox TextBox1;
const long LOGON32_PROVIDER_WINNT35 = 1;

[DllImport("advapi32.dll",EntryPoint
= "LogonUser")]
private static extern bool LogonUser(
string lpszUsername,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken);

-----Original Message-----
Dear All,

I would like to perform a simple task by program (VB.Net or VC#.Net).
When a user logins the windows and try to run my program, how can I use his login information (username and
password) to authenicate against another PC, e.g. using
DirectoryEntry object?
I have these lines of code, but it needs the user to enter username and password in Textboxes txtUsername and
txtPassword respectively. I would like to use the current
login session information to do the job instead..System.DirectoryServices.DirectoryEntry usr = new DirectoryEntry(entryPC.Path, txtUsername.Text,
txtPassword.Text);string strUserID;
try
{
strUserID = usr.NativeGuid;
MessageBox.Show("Login correct!");
}
catch
{
MessageBox.Show("Login Incorrect!");
}

Thanks for your help.
--------------------------------
From: Stephen Yip

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

<Id>EHsuCqGmSUa45Rjc8gxZLg==</Id>
.