Unix password sync and mixed-case usernames

Andreas Haumer andreas at xss.co.at
Tue Jun 12 19:28:00 GMT 2001


I hate to reply to myself, but as I haven't got any
response to my original message from June 2nd, and as
function chgpasswd() still contains this strlower(name) call
(I just did a CVS update to my working copy), which 
effectiviely disables a correct Unix password sync with 
mixed-case usernames, I would like to ask again if this 
call to strlower() could be removed...

Or did I miss something? Is there any other (preferred) way 
to do Unix password sync with mixed-case usernames?

Comments, anyone?


Andreas Haumer wrote:
> Hi!
> I found a problem with samba 2.2.0 working on Linux as PDC
> for a NT domain.
> In that specific installation, all usernames have their
> first character in upper-case (like "User"). (don't
> ask, that wasn't my idea...)
> With this setup, there is a problem when the user tries
> to change his password from the NT workstation with
> unix password sync active: At the beginning of function
> chgpasswd.c:chgpasswd(), there is a call to strlower(name),
> which changes the username to all lowercase. After that
> change, the passwd chat sequence of course fails, as the
> unix passwd command complains about an unknown username!
> As a first fix, I just commented out the call to strlower(),
> and now syncing passwords between Samba and Linux works
> fine, even with mixed case usernames.
> I do not quite understand why the username has to be strlowered
> there, anyway. At that point, checks of username were
> already done in function _samr_chgpasswd_user() and there is only
> the unix password sync left to do. So why change the username
> string here? I would suggest to just delete the call to strlower()
> Any comments?

Andreas Haumer                     | mailto:andreas at xss.co.at
*x Software + Systeme              | http://www.xss.co.at/
Karmarschgasse 51/2/20             | Tel: +43-1-6060114-0
A-1100 Vienna, Austria             | Fax: +43-1-6060114-71

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