1/*	$NetBSD: pam_getenv.c,v 1.5 2023/06/30 21:46:21 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
5 * Copyright (c) 2004-2019 Dag-Erling Sm��rgrav
6 * All rights reserved.
7 *
8 * This software was developed for the FreeBSD Project by ThinkSec AS and
9 * Network Associates Laboratories, the Security Research Division of
10 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
11 * ("CBOSS"), as part of the DARPA CHATS research program.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. The name of the author may not be used to endorse or promote
22 *    products derived from this software without specific prior written
23 *    permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <sys/cdefs.h>
43__RCSID("$NetBSD: pam_getenv.c,v 1.5 2023/06/30 21:46:21 christos Exp $");
44
45#include <errno.h>
46#include <stdlib.h>
47#include <string.h>
48
49#include <security/pam_appl.h>
50
51#include "openpam_impl.h"
52
53/*
54 * XSSO 4.2.1
55 * XSSO 6 page 44
56 *
57 * Retrieve the value of a PAM environment variable
58 */
59
60const char *
61pam_getenv(pam_handle_t *pamh,
62	const char *name)
63{
64	size_t len;
65	int i;
66
67	ENTERS(name);
68	for (len = 0; name[len] != '\0'; ++len) {
69		if (name[len] == '=') {
70			errno = EINVAL;
71			RETURNS(NULL);
72		}
73	}
74	if ((i = openpam_findenv(pamh, name, len)) < 0)
75		RETURNS(NULL);
76	/* assert(pamh->env[i][len] == '='); */
77	RETURNS(pamh->env[i] + len + 1);
78}
79
80/**
81 * The =pam_getenv function returns the value of an environment variable.
82 * Its semantics are similar to those of =getenv, but it accesses the PAM
83 * context's environment list instead of the application's.
84 *
85 * >pam_getenvlist
86 * >pam_putenv
87 * >pam_setenv
88 */
89