pam_get_authtok.c revision 91100 
112029Sache/*-
287108Sache * Copyright (c) 2002 Networks Associates Technologies, Inc.
387108Sache * All rights reserved.
487108Sache *
512029Sache * This software was developed for the FreeBSD Project by ThinkSec AS and
6175588Sache * NAI Labs, the Security Research Division of Network Associates, Inc.
787108Sache * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
812029Sache * DARPA CHATS research program.
912029Sache *
1012029Sache * Redistribution and use in source and binary forms, with or without
1112029Sache * modification, are permitted provided that the following conditions
1212029Sache * are met:
1312029Sache * 1. Redistributions of source code must retain the above copyright
1412029Sache *    notice, this list of conditions and the following disclaimer.
1512029Sache * 2. Redistributions in binary form must reproduce the above copyright
1612029Sache *    notice, this list of conditions and the following disclaimer in the
1712029Sache *    documentation and/or other materials provided with the distribution.
1812029Sache * 3. The name of the author may not be used to endorse or promote
1912029Sache *    products derived from this software without specific prior written
2012029Sache *    permission.
2112029Sache *
2212029Sache * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
2387108Sache * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2412029Sache * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2512029Sache * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
2687108Sache * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2712029Sache * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2812029Sache * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2912029Sache * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $Id$
35 */
36
37#include <sys/param.h>
38
39#include <security/pam_appl.h>
40#include <security/openpam.h>
41
42#include "openpam_impl.h"
43
44/*
45 * OpenPAM extension
46 *
47 * Retrieve authentication token
48 */
49
50int
51pam_get_authtok(pam_handle_t *pamh,
52	const char **authtok,
53	const char *prompt)
54{
55	char *p, *resp;
56	int r, style;
57
58	if (pamh == NULL || authtok == NULL)
59		return (PAM_SYSTEM_ERR);
60
61	if (openpam_get_option(pamh, "try_first_pass") ||
62	    openpam_get_option(pamh, "use_first_pass")) {
63		r = pam_get_item(pamh, PAM_AUTHTOK, (const void **)authtok);
64		if (r == PAM_SUCCESS && *authtok != NULL)
65			return (PAM_SUCCESS);
66		else if (openpam_get_option(pamh, "use_first_pass"))
67			return (r == PAM_SUCCESS ? PAM_AUTH_ERR : r);
68	}
69	if (pam_get_item(pamh, PAM_AUTHTOK_PROMPT,
70	    (const void **)&p) != PAM_SUCCESS || p == NULL)
71		if (prompt == NULL)
72			prompt = "Password:";
73	style = openpam_get_option(pamh, "echo_pass") ?
74	    PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF;
75	r = pam_prompt(pamh, style, &resp, "%s", p ? p : prompt);
76	if (r != PAM_SUCCESS)
77		return (r);
78	*authtok = resp;
79	return (pam_set_item(pamh, PAM_AUTHTOK, *authtok));
80}
81
82/*
83 * Error codes:
84 *
85 *	=pam_get_item
86 *	=pam_prompt
87 *	=pam_set_item
88 *	!PAM_SYMBOL_ERR
89 */
90