samba - Aug 2005 - enforcing password compexity (check password script, cracklib)

Hello,

I would like to enforce some level of password complexity when users 
change their password.  I have a Samba PDC running on Debian set to sync 
Unix passwords.  I'm trying to get Samba to work with cracklib, but it 
isn't going well.

Here is what I've tried:

Installed libpam-cracklib, compiled examples/auth/crackcheck and copied 
the binary to /usr/local/sbin.

I added the following line to my smb.conf file:

check password script = /usr/local/sbin/crackcheck

Edited /etc/pam.d/common-password to look like this:

password required         pam_unix.so nullok obscure min=4 max=8 md5
password required         pam_cracklib.so retry=3 minlen=6 difok=3
password required         pam_unix.so use_authtok nullok md5

Restarted Samba and tried to change my password from a Windows box and 
smbpasswd.  I get this error when using smbpasswd:

machine 127.0.0.1 rejected the (anonymous) password change: Error was : 
Password restriction.
Failed to change password for cmclaugh

I picked a rather random and strong password, so I believe there is some 
misconfiguration.

I would appreciate any advice.

Thanks,
Charles

I'm posting this for the sake of the archives.

To get this to work I had to generate the cracklib dictionary by running 
update-cracklib or /etc/cron.daily/cracklib then specify the cracklib 
dictionary on the relevant line in smb.conf:

check password script = /usr/local/sbin/crackcheck -d 
/var/cache/cracklib/cracklib_dict

Charles

Charles McLaughlin wrote:
> Hello,
> 
> I would like to enforce some level of password complexity when users 
> change their password.  I have a Samba PDC running on Debian set to sync 
> Unix passwords.  I'm trying to get Samba to work with cracklib, but it 
> isn't going well.
> 
> Here is what I've tried:
> 
> Installed libpam-cracklib, compiled examples/auth/crackcheck and copied 
> the binary to /usr/local/sbin.
> 
> I added the following line to my smb.conf file:
> 
> check password script = /usr/local/sbin/crackcheck
> 
> Edited /etc/pam.d/common-password to look like this:
> 
> password required         pam_unix.so nullok obscure min=4 max=8 md5
> password required         pam_cracklib.so retry=3 minlen=6 difok=3
> password required         pam_unix.so use_authtok nullok md5
> 
> Restarted Samba and tried to change my password from a Windows box and 
> smbpasswd.  I get this error when using smbpasswd:
> 
> machine 127.0.0.1 rejected the (anonymous) password change: Error was : 
> Password restriction.
> Failed to change password for cmclaugh
> 
> I picked a rather random and strong password, so I believe there is some 
> misconfiguration.
> 
> I would appreciate any advice.
> 
> Thanks,
> Charles
>