OPENPAM_NULLCONV(3) | Library Functions Manual | OPENPAM_NULLCONV(3)

# NAME

`openpam_nullconv` —
null conversation function

# 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 dialog 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 configuration 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_SUCCESS`]
  Success.
[`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.

The OpenPAM library is maintained by Dag-Erling Smørgrav <des@des.no>.

April 30, 2017 | NetBSD 9.4