1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2017 Dag-Erling Sm��rgrav
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
57int
58pam_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