Authenticating Username & Password

[Johan]

Hi All,

I want to use NT authentication in one of my projects, but I'm having trouble
determining whether the entered Username & Password is valid for the current
domain. The app requires a user to enter a Username & Password every time
a certain task is executed and different users will operate the app on the
same machine.

I have no problem getting the user info with 'NetUserGetInfo' in 'netapi32',
but I can't determine whether it's a valid password or not. The password
returned from the USER_INFO_EXT_API type is blank - for obvious reasons

Can anybody tell me how to take a Username and Password and authenticate
it on the current domain ?

TIA
Johan

[Monte Hansen]

You can use LogonUser, which requires the SE_TCB_NAME privilege. This
privilege must be manually added as it is not granted to anyone by default,
not event an Administrator.

+|+|+|+|+|+|+|+|+|+|+|+|+|+|+|+
Monte Hansen
http://KillerVB.com
+|+|+|+|+|+|+|+|+|+|+|+|+|+|+|+


"Johan" <johan.grobler@ensemble.co.za> wrote in message
news:3af27b31$1@news.devx.com...
>
> Hi All,
>
> I want to use NT authentication in one of my projects, but I'm having
trouble
> determining whether the entered Username & Password is valid for the
current
> domain. The app requires a user to enter a Username & Password every time
> a certain task is executed and different users will operate the app on the
> same machine.
>
> I have no problem getting the user info with 'NetUserGetInfo' in
'netapi32',
> but I can't determine whether it's a valid password or not. The password
> returned from the USER_INFO_EXT_API type is blank - for obvious reasons
>
> Can anybody tell me how to take a Username and Password and authenticate
> it on the current domain ?
>
> TIA
> Johan

[Monte Hansen]

You can use LogonUser, which requires the SE_TCB_NAME privilege. This
privilege must be manually added as it is not granted to anyone by default,
not event an Administrator.

+|+|+|+|+|+|+|+|+|+|+|+|+|+|+|+
Monte Hansen
http://KillerVB.com
+|+|+|+|+|+|+|+|+|+|+|+|+|+|+|+


"Johan" <johan.grobler@ensemble.co.za> wrote in message
news:3af27b31$1@news.devx.com...
>
> Hi All,
>
> I want to use NT authentication in one of my projects, but I'm having
trouble
> determining whether the entered Username & Password is valid for the
current
> domain. The app requires a user to enter a Username & Password every time
> a certain task is executed and different users will operate the app on the
> same machine.
>
> I have no problem getting the user info with 'NetUserGetInfo' in
'netapi32',
> but I can't determine whether it's a valid password or not. The password
> returned from the USER_INFO_EXT_API type is blank - for obvious reasons
>
> Can anybody tell me how to take a Username and Password and authenticate
> it on the current domain ?
>
> TIA
> Johan

[L.J. Johnson]

Johan,

http://gethelp.devx.com/techtips/nt_.../10min0498.asp
http://gethelp.devx.com/techtips/nt_.../10min0598.asp

--
L.J. Johnson, Slightly Tilted Software
Microsoft MVP (Visual Basic)
LJJohnson@SlightlyTiltedSoftware.com or LJJohnson@mvps.org
<http://www.SlightlyTiltedSoftware.com>
Ask The NT Pro at <http://www.devx.com/gethelp>

"Johan" <johan.grobler@ensemble.co.za> wrote in message
news:3af27b31$1@news.devx.com...
>
> Hi All,
>
> I want to use NT authentication in one of my projects, but I'm having
trouble
> determining whether the entered Username & Password is valid for the
current
> domain. The app requires a user to enter a Username & Password every time
> a certain task is executed and different users will operate the app on the
> same machine.
>
> I have no problem getting the user info with 'NetUserGetInfo' in
'netapi32',
> but I can't determine whether it's a valid password or not. The password
> returned from the USER_INFO_EXT_API type is blank - for obvious reasons
>
> Can anybody tell me how to take a Username and Password and authenticate
> it on the current domain ?
>
> TIA
> Johan

[L.J. Johnson]

Johan,

http://gethelp.devx.com/techtips/nt_.../10min0498.asp
http://gethelp.devx.com/techtips/nt_.../10min0598.asp

--
L.J. Johnson, Slightly Tilted Software
Microsoft MVP (Visual Basic)
LJJohnson@SlightlyTiltedSoftware.com or LJJohnson@mvps.org
<http://www.SlightlyTiltedSoftware.com>
Ask The NT Pro at <http://www.devx.com/gethelp>

"Johan" <johan.grobler@ensemble.co.za> wrote in message
news:3af27b31$1@news.devx.com...
>
> Hi All,
>
> I want to use NT authentication in one of my projects, but I'm having
trouble
> determining whether the entered Username & Password is valid for the
current
> domain. The app requires a user to enter a Username & Password every time
> a certain task is executed and different users will operate the app on the
> same machine.
>
> I have no problem getting the user info with 'NetUserGetInfo' in
'netapi32',
> but I can't determine whether it's a valid password or not. The password
> returned from the USER_INFO_EXT_API type is blank - for obvious reasons
>
> Can anybody tell me how to take a Username and Password and authenticate
> it on the current domain ?
>
> TIA
> Johan