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_putenv.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 <errno.h>
43 #include <stdlib.h>
44 #include <string.h>
45
46 #include <security/pam_appl.h>
47
48 #include "openpam_impl.h"
49
50 /*
51 * XSSO 4.2.1
52 * XSSO 6 page 56
53 *
54 * Set the value of an environment variable
55 */
56
57 int
pam_putenv(pam_handle_t * pamh,const char * namevalue)58 pam_putenv(pam_handle_t *pamh,
59 const char *namevalue)
60 {
61 char **env, *p;
62 size_t env_size;
63 int i;
64
65 ENTER();
66
67 /* sanity checks */
68 if ((p = strchr(namevalue, '=')) == NULL) {
69 errno = EINVAL;
70 RETURNC(PAM_SYSTEM_ERR);
71 }
72
73 /* see if the variable is already in the environment */
74 if ((i = openpam_findenv(pamh, namevalue, p - namevalue)) >= 0) {
75 if ((p = strdup(namevalue)) == NULL)
76 RETURNC(PAM_BUF_ERR);
77 FREE(pamh->env[i]);
78 pamh->env[i] = p;
79 RETURNC(PAM_SUCCESS);
80 }
81
82 /* grow the environment list if necessary */
83 if (pamh->env_count == pamh->env_size) {
84 env_size = pamh->env_size * 2 + 1;
85 env = realloc(pamh->env, sizeof(char *) * env_size);
86 if (env == NULL)
87 RETURNC(PAM_BUF_ERR);
88 pamh->env = env;
89 pamh->env_size = env_size;
90 }
91
92 /* add the variable at the end */
93 if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL)
94 RETURNC(PAM_BUF_ERR);
95 ++pamh->env_count;
96 RETURNC(PAM_SUCCESS);
97 }
98
99 /*
100 * Error codes:
101 *
102 * PAM_SYSTEM_ERR
103 * PAM_BUF_ERR
104 */
105
106 /**
107 * The =pam_putenv function sets an environment variable.
108 * Its semantics are similar to those of =putenv, but it modifies the PAM
109 * context's environment list instead of the application's.
110 *
111 * >pam_getenv
112 * >pam_getenvlist
113 * >pam_setenv
114 */
115