1/* $NetBSD: pam_putenv.c,v 1.5 2023/06/30 21:46:21 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2017 Dag-Erling Sm��rgrav 6 * All rights reserved. 7 * 8 * This software was developed for the FreeBSD Project by ThinkSec AS and 9 * Network Associates Laboratories, the Security Research Division of 10 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11 * ("CBOSS"), as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#ifdef HAVE_CONFIG_H 39# include "config.h" 40#endif 41 42#include <sys/cdefs.h> 43__RCSID("$NetBSD: pam_putenv.c,v 1.5 2023/06/30 21:46:21 christos Exp $"); 44 45#include <errno.h> 46#include <stdlib.h> 47#include <string.h> 48 49#include <security/pam_appl.h> 50 51#include "openpam_impl.h" 52 53/* 54 * XSSO 4.2.1 55 * XSSO 6 page 56 56 * 57 * Set the value of an environment variable 58 */ 59 60int 61pam_putenv(pam_handle_t *pamh, 62 const char *namevalue) 63{ 64 char **env; 65 const char *p; 66 size_t env_size; 67 int i; 68 69 ENTER(); 70 71 /* sanity checks */ 72 if ((p = strchr(namevalue, '=')) == NULL) { 73 errno = EINVAL; 74 RETURNC(PAM_SYSTEM_ERR); 75 } 76 77 /* see if the variable is already in the environment */ 78 if ((i = openpam_findenv(pamh, namevalue, 79 (size_t)(p - namevalue))) >= 0) { 80 char *q; 81 if ((q = strdup(namevalue)) == NULL) 82 RETURNC(PAM_BUF_ERR); 83 FREE(pamh->env[i]); 84 pamh->env[i] = q; 85 RETURNC(PAM_SUCCESS); 86 } 87 88 /* grow the environment list if necessary */ 89 if (pamh->env_count == pamh->env_size) { 90 env_size = pamh->env_size * 2 + 1; 91 env = realloc(pamh->env, sizeof(*env) * env_size); 92 if (env == NULL) 93 RETURNC(PAM_BUF_ERR); 94 pamh->env = env; 95 pamh->env_size = env_size; 96 } 97 98 /* add the variable at the end */ 99 if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL) 100 RETURNC(PAM_BUF_ERR); 101 ++pamh->env_count; 102 RETURNC(PAM_SUCCESS); 103} 104 105/* 106 * Error codes: 107 * 108 * PAM_SYSTEM_ERR 109 * PAM_BUF_ERR 110 */ 111 112/** 113 * The =pam_putenv function sets an environment variable. 114 * Its semantics are similar to those of =putenv, but it modifies the PAM 115 * context's environment list instead of the application's. 116 * 117 * >pam_getenv 118 * >pam_getenvlist 119 * >pam_setenv 120 */ 121