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 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