OPENPAM_NULLCONV(3)      BSD Library Functions Manual      OPENPAM_NULLCONV(3)

NAME
     openpam_nullconv -- null conversation function

LIBRARY
     Pluggable Authentication Module Library (libpam, -lpam)

SYNOPSIS
     #include <sys/types.h>
     #include <security/pam_appl.h>
     #include <security/openpam.h>

     int
     openpam_nullconv(int n, const struct pam_message **msg,
         struct pam_response **resp, void *data);

DESCRIPTION
     The openpam_nullconv function is a null conversation function suitable
     for applications that want to use PAM but don't support interactive dia-
     log with the user.  Such applications should set PAM_AUTHTOK to whatever
     authentication token they've obtained on their own before calling
     pam_authenticate(3) and / or pam_chauthtok(3), and their PAM configura-
     tion should specify the use_first_pass option for all modules that
     require access to the authentication token, to make sure they use
     PAM_AUTHTOK rather than try to query the user.

RETURN VALUES
     The openpam_nullconv function returns one of the following values:

     [PAM_CONV_ERR]      Conversation failure.

SEE ALSO
     openpam_ttyconv(3), pam(3), pam_authenticate(3), pam_chauthtok(3),
     pam_prompt(3), pam_set_item(3), pam_strerror(3), pam_vprompt(3)

STANDARDS
     The openpam_nullconv function is an OpenPAM extension.

AUTHORS
     The openpam_nullconv function and this manual page were developed for the
     FreeBSD Project by ThinkSec AS and Network Associates Laboratories, the
     Security Research Division of Network Associates, Inc. under DARPA/SPAWAR
     contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS
     research program.

BSD                            December 21, 2007                           BSD