1 /*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2017 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 * $OpenPAM: pam_getenvlist.c 938 2017-04-30 21:34:42Z des $
36 */
37
38 #ifdef HAVE_CONFIG_H
39 # include "config.h"
40 #endif
41
42 #include <stdlib.h>
43 #include <string.h>
44
45 #include <security/pam_appl.h>
46
47 #include "openpam_impl.h"
48
49 /*
50 * XSSO 4.2.1
51 * XSSO 6 page 45
52 *
53 * Returns a list of all the PAM environment variables
54 */
55
56 char **
pam_getenvlist(pam_handle_t * pamh)57 pam_getenvlist(pam_handle_t *pamh)
58 {
59 char **envlist;
60 int i;
61
62 ENTER();
63 envlist = malloc(sizeof(char *) * (pamh->env_count + 1));
64 if (envlist == NULL) {
65 openpam_log(PAM_LOG_ERROR, "%s",
66 pam_err_text[PAM_BUF_ERR]);
67 RETURNP(NULL);
68 }
69 for (i = 0; i < pamh->env_count; ++i) {
70 if ((envlist[i] = strdup(pamh->env[i])) == NULL) {
71 while (i) {
72 --i;
73 FREE(envlist[i]);
74 }
75 FREE(envlist);
76 openpam_log(PAM_LOG_ERROR, "%s",
77 pam_err_text[PAM_BUF_ERR]);
78 RETURNP(NULL);
79 }
80 }
81 envlist[i] = NULL;
82 RETURNP(envlist);
83 }
84
85 /**
86 * The =pam_getenvlist function returns a copy of the given PAM context's
87 * environment list as a pointer to an array of strings.
88 * The last element in the array is =NULL.
89 * The pointer is suitable for assignment to {Va environ}.
90 *
91 * The array and the strings it lists are allocated using =malloc, and
92 * should be released using =free after use:
93 *
94 * char **envlist, **env;
95 *
96 * envlist = environ;
97 * environ = pam_getenvlist(pamh);
98 * \/\* do something nifty \*\/
99 * for (env = environ; *env != NULL; env++)
100 * free(*env);
101 * free(environ);
102 * environ = envlist;
103 *
104 * >environ 7
105 * >pam_getenv
106 * >pam_putenv
107 * >pam_setenv
108 */
109