pam_get_authtok.c revision 91094 
191094Sdes/*-
291094Sdes * Copyright (c) 2002 Networks Associates Technologies, Inc.
391094Sdes * All rights reserved.
491094Sdes *
591094Sdes * This software was developed for the FreeBSD Project by ThinkSec AS and
691094Sdes * NAI Labs, the Security Research Division of Network Associates, Inc.
791094Sdes * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
891094Sdes * DARPA CHATS research program.
991094Sdes *
1091094Sdes * Redistribution and use in source and binary forms, with or without
1191094Sdes * modification, are permitted provided that the following conditions
1291094Sdes * are met:
1391094Sdes * 1. Redistributions of source code must retain the above copyright
1491094Sdes *    notice, this list of conditions and the following disclaimer.
1591094Sdes * 2. Redistributions in binary form must reproduce the above copyright
1691094Sdes *    notice, this list of conditions and the following disclaimer in the
1791094Sdes *    documentation and/or other materials provided with the distribution.
1891094Sdes * 3. The name of the author may not be used to endorse or promote
1991094Sdes *    products derived from this software without specific prior written
2091094Sdes *    permission.
2191094Sdes *
2291094Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
2391094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2491094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2591094Sdes * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
2691094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2791094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2891094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2991094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3091094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3191094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3291094Sdes * SUCH DAMAGE.
3391094Sdes *
3491094Sdes * $Id$
3591094Sdes */
3691094Sdes
3791094Sdes#include <sys/param.h>
3891094Sdes
3991094Sdes#include <security/pam_appl.h>
4091094Sdes#include <security/openpam.h>
4191094Sdes
4291094Sdes#include "openpam_impl.h"
4391094Sdes
4491094Sdes/*
4591094Sdes * OpenPAM extension
4691094Sdes *
4791094Sdes * Retrieve authentication token
4891094Sdes */
4991094Sdes
5091094Sdesint
5191094Sdespam_get_authtok(pam_handle_t *pamh,
5291094Sdes	const char **authtok,
5391094Sdes	const char *prompt)
5491094Sdes{
5591094Sdes	char *p, *resp;
5691094Sdes	int r;
5791094Sdes
5891094Sdes	if (pamh == NULL || authtok == NULL)
5991094Sdes		return (PAM_SYSTEM_ERR);
6091094Sdes
6191094Sdes	r = pam_get_item(pamh, PAM_AUTHTOK, (const void **)authtok);
6291094Sdes	if (r == PAM_SUCCESS)
6391094Sdes		return (PAM_SUCCESS);
6491094Sdes	if (prompt == NULL) {
6591094Sdes		if (pam_get_item(pamh, PAM_AUTHTOK_PROMPT,
6691094Sdes		    (const void **)&p) != PAM_SUCCESS || p == NULL)
6791094Sdes			prompt = "Password:";
6891094Sdes	}
6991094Sdes	r = pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &resp,
7091094Sdes	    "%s", prompt ? prompt : p);
7191094Sdes	if (r != PAM_SUCCESS)
7291094Sdes		return (r);
7391094Sdes	*authtok = resp;
7491094Sdes	return (pam_set_item(pamh, PAM_AUTHTOK, *authtok));
7591094Sdes}
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