Re: pwdHistory, encrypted passwords and selfservice application

[Dario Zanzico <dario@dariozanzico.com>]

On Thu, Oct 29, 2015, at 11:18 AM, Bogdan Rudas wrote:
> Hello all,
> I'm working on Self-service application and want to prevent user from
> re-using old passwords. What is correct way to chage password takin in
> mind
> password history?
> 
> I guess it is:
> 1. Bind with special user and check if specified uid exists
> 2. Bind using user-supplied uid and password
> 3. Get password policy, history etc. and  validate on selfservice-side
> 4. Execute LDAP modifyRequest with single item: userPassword and value of
> new hashed password.
> 
> In my case same password gives same hash. Are there any way to force
> encrypted password history validation on server side?

you could leave points 3 and 4 to a ppolicy overlay (server side)
http://www.openldap.org/doc/admin24/overlays.html (12.10)

You should set, in your policy(es), the
olcPPolicyHashCleartext
attribute to true and send the new password as cleartext so the overlay
can test it against your requisites and, if those checks are successful:
- encrypt it
- rotate the pwdHistory attributes (which stores the last $pwdInHistory
password hashes)

take a look at the slapo-ppolicy manpage

> Thank you.
> -- 
> Bogdan Rudas

hope this helps,

dario zanzico