Always prompting for OTP

[BuzzSaw Code]

On Tue, May 10, 2022 at 2:49 PM Russ Allbery <eagle at eyrie.org> wrote:

> BuzzSaw Code <buzzsaw.code at gmail.com> writes:
>
> > We want the full OTP+password string just passed without modification.
>
> Ah, okay, so then in theory the problem could be solved entirely within
> the Kerberos libraries, although I haven't wrapped my mind around the
> problem Greg identified.
>

Same - I started walking through the code but haven't tracked down the
point where it tosses the original creds.


>
> > It would also be nice if when we use
> > try_first_pass/use_first_pass/force_first_pass options with pam_krb5
> > that it actually did that in the OTP case without the extra prompt.
> > no_prompt doesn't help as the password doesn't stay on the stack.
>
> I'm assuming this is because the Kerberos library doesn't think that the
> passed-in password can be sent after the FAST negotiation and therefore
> re-prompts internally?  I'm not sure I entirely understand the logic flow
> here.


Me either - haven't been able to fullyl grasp the flow.