I have a pending patch for per-user last. it is in my todo list....

On Nov 1, 10:32 pm, Eli Collins <e...@astllc.org> wrote:
> I'm coming slightly late to this thread, but wanted to add a note...
>
> > If we did implement this approach, the next question is, could we also
> > implement a scheme whereby if the algo is changed, when someone goes to
> > change their password, the system can confirm that the old password is
> > provided correctly and then store the new password under the new scheme?
>
> If you do decide to use the passlib 
> <http://packages.python.org/passlib>library (per João
> Gulineli's post <http://../d/msg/web2py/WEiNGgDya58/zoKCedgl-qwJ>), it also
> offers a 
> CryptContext<http://packages.python.org/passlib/lib/passlib.context-usage.html#bas...>class
>  which can configurably let you support multiple hashes at once; but
> more importantly (with regards the quoted question), it also lets you mark
> certain hash schemes as "deprecated", and offers a method
> verify_and_update()<http://packages.python.org/passlib/lib/passlib.context-interface.html...>method
>  which takes care of that exact operation you described: verify
> password, and re-encode if previously stored using a deprecated hash (the
> function docs link to a usage example).
>
> - Eli Collins

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