1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
7 * Network Associates Laboratories, the Security Research Division of
8 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $Id: pam_start.c 648 2013-03-05 17:54:27Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45
46#include <security/pam_appl.h>
47
48#include "openpam_impl.h"
49#include "openpam_strlcpy.h"
50
51#ifdef _SC_HOST_NAME_MAX
52#define HOST_NAME_MAX sysconf(_SC_HOST_NAME_MAX)
53#else
54#define HOST_NAME_MAX 1024
55#endif
56
57/*
58 * XSSO 4.2.1
59 * XSSO 6 page 89
60 *
61 * Initiate a PAM transaction
62 */
63
64int
65pam_start(const char *service,
66	const char *user,
67	const struct pam_conv *pam_conv,
68	pam_handle_t **pamh)
69{
70	char hostname[HOST_NAME_MAX + 1];
71	struct pam_handle *ph;
72	int r;
73
74	ENTER();
75	if ((ph = calloc(1, sizeof *ph)) == NULL)
76		RETURNC(PAM_BUF_ERR);
77	if ((r = pam_set_item(ph, PAM_SERVICE, service)) != PAM_SUCCESS)
78		goto fail;
79	if (gethostname(hostname, sizeof hostname) != 0)
80		strlcpy(hostname, "localhost", sizeof hostname);
81	if ((r = pam_set_item(ph, PAM_HOST, hostname)) != PAM_SUCCESS)
82		goto fail;
83	if ((r = pam_set_item(ph, PAM_USER, user)) != PAM_SUCCESS)
84		goto fail;
85	if ((r = pam_set_item(ph, PAM_CONV, pam_conv)) != PAM_SUCCESS)
86		goto fail;
87	if ((r = openpam_configure(ph, service)) != PAM_SUCCESS)
88		goto fail;
89	*pamh = ph;
90	openpam_log(PAM_LOG_DEBUG, "pam_start(\"%s\") succeeded", service);
91	RETURNC(PAM_SUCCESS);
92fail:
93	pam_end(ph, r);
94	RETURNC(r);
95}
96
97/*
98 * Error codes:
99 *
100 *	=openpam_configure
101 *	=pam_set_item
102 *	!PAM_SYMBOL_ERR
103 *	PAM_BUF_ERR
104 */
105
106/**
107 * The =pam_start function creates and initializes a PAM context.
108 *
109 * The =service argument specifies the name of the policy to apply, and is
110 * stored in the =PAM_SERVICE item in the created context.
111 *
112 * The =user argument specifies the name of the target user - the user the
113 * created context will serve to authenticate.
114 * It is stored in the =PAM_USER item in the created context.
115 *
116 * The =pam_conv argument points to a =struct pam_conv describing the
117 * conversation function to use; see =pam_conv for details.
118 *
119 * >pam_get_item
120 * >pam_set_item
121 * >pam_end
122 */
123