[Bug 2876] PAM_TEXT_INFO and PAM_ERROR_MSG conversation not honoured during PAM authentication

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Wed Jun 13 17:44:41 AEST 2018


Darren Tucker <dtucker at dtucker.net> changed:

           What    |Removed                     |Added
                 CC|                            |dtucker at dtucker.net

--- Comment #3 from Darren Tucker <dtucker at dtucker.net> ---
(In reply to Damien Miller from comment #1)
> You should try disabling password authentication and using
> keyboard-interactive authentication instead, as it allows
> informational prompts.

Looking at the code, I think it's the case for keyboard-interactive

                case PAM_ERROR_MSG:
                case PAM_TEXT_INFO:
                        /* accumulate messages */
                        len = plen + mlen + 2;

I think it's that way because the same conversation function had to
handle both Protocol 2 keyboard-interactive and Protocol 1 TIS
challenge-response.  The latter is fairly limited, but is now
(mercifully) gone.

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