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