keyboard-interactive

[Nicolas Williams]

On Thu, Jan 10, 2002 at 02:50:03PM +0100, Markus Friedl wrote:
> On Thu, Jan 10, 2002 at 08:23:41AM -0500, Nicolas Williams wrote:
> > Bingo. Make the mainloop reentrant.
> 
> yes, this uglyness is currently used:
> 
>     dispatch_run()
> 	input_userauth_request()
> 	    userauth_kbdint()
> 		auth2_pam()
> 		    pam_authenticate()
> 			do_pam_conversation_kbd_int()
> 			    dispatch_run()

I don't think that's ugly... It would be easier if all PAM
implementations supported PAM_CONV_AGAIN/PAM_INCOMPLETE/pam_*()
restarts though.

> now we receive a USERAUTH_REQUEST(pubkey) and should
> call input_userauth_request()......

Well, if that implies that kbd-interact cannot proceed, then
dispatch_run() can return to do_pam_conversation_kbd_int() and so on
back to the top-level dispatch_run().

But if kbd-interact messages can be interleaved with others, then I fail
to see any other way to make this work.

Nico
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