1 /*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2019 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
36 #ifdef HAVE_CONFIG_H
37 # include "config.h"
38 #endif
39
40 #include <errno.h>
41 #include <stdlib.h>
42 #include <string.h>
43
44 #include <security/pam_appl.h>
45
46 #include "openpam_impl.h"
47
48 /*
49 * XSSO 4.2.1
50 * XSSO 6 page 44
51 *
52 * Retrieve the value of a PAM environment variable
53 */
54
55 const char *
pam_getenv(pam_handle_t * pamh,const char * name)56 pam_getenv(pam_handle_t *pamh,
57 const char *name)
58 {
59 size_t len;
60 int i;
61
62 ENTERS(name);
63 for (len = 0; name[len] != '\0'; ++len) {
64 if (name[len] == '=') {
65 errno = EINVAL;
66 RETURNS(NULL);
67 }
68 }
69 if ((i = openpam_findenv(pamh, name, len)) < 0)
70 RETURNS(NULL);
71 /* assert(pamh->env[i][len] == '='); */
72 RETURNS(pamh->env[i] + len + 1);
73 }
74
75 /**
76 * The =pam_getenv function returns the value of an environment variable.
77 * Its semantics are similar to those of =getenv, but it accesses the PAM
78 * context's environment list instead of the application's.
79 *
80 * >pam_getenvlist
81 * >pam_putenv
82 * >pam_setenv
83 */
84