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 Smørgrav
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
60 const char *
pam_getenv(pam_handle_t * pamh,const char * name)61 pam_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