1 /*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2004-2011 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 * $Id: pam_putenv.c 914 2017-01-21 15:15:29Z 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 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