[389-devel] Re: Close of 48241, let's not support bad crypto

On Mon, 2016-10-03 at 21:26 -0600, Rich Megginson wrote:
> On 10/03/2016 08:58 PM, William Brown wrote:
> > Hi,
> >
> > I want to close #48241 [0] as "wontfix". I do not believe that it's
> > appropriate to provide SHA3 as a password hashing algorithm.
> >
> > The SHA3 algorithm is designed to be fast, and cryptographically secure.
> > It's target usage is for signatures and verification of these in a rapid
> > manner.
> >
> > The fact that this algorithm is fast, and could be implemented in
> > hardware is the reason it's not appropriate for password hashing.
> > Passwords should be hashed with a slow algorithm, and in the future, an
> > algorithm that is CPU and memory hard. This means that in the (hopefully
> > unlikely) case of password hash leak or dump from ldap that the attacker
> > must spend a huge amount of resources to brute force or attack any
> > password that we are storing in the system.
>
> If the crypto/security team is ok with not supporting SHA3 for
> passwords, works for me.

Who would be a point of contact to ask this?

>
> >
> > As a result, I would like to make this ticket "wontfix" with an
> > explanation of why. I think it's better for us to pursue #397 [1].
> > PBKDF2 is a CPU hard algorithm, and scrypt is both CPU and Memory hard.
> > These are the direction we should be going (asap).
> >
> > Thanks,
> >
> >
> > [0] https://fedorahosted.org/389/ticket/48241
> > [1] https://fedorahosted.org/389/ticket/397
> >
> >
> >
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>
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--
Sincerely,

William Brown
Software Engineer
Red Hat, Brisbane