pam_putenv.c revision 256281
11592Srgrimes/*- 21592Srgrimes * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 31592Srgrimes * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav 41592Srgrimes * All rights reserved. 51592Srgrimes * 61592Srgrimes * This software was developed for the FreeBSD Project by ThinkSec AS and 71592Srgrimes * Network Associates Laboratories, the Security Research Division of 81592Srgrimes * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 91592Srgrimes * ("CBOSS"), as part of the DARPA CHATS research program. 101592Srgrimes * 111592Srgrimes * Redistribution and use in source and binary forms, with or without 121592Srgrimes * modification, are permitted provided that the following conditions 131592Srgrimes * are met: 141592Srgrimes * 1. Redistributions of source code must retain the above copyright 151592Srgrimes * notice, this list of conditions and the following disclaimer. 161592Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171592Srgrimes * notice, this list of conditions and the following disclaimer in the 181592Srgrimes * documentation and/or other materials provided with the distribution. 191592Srgrimes * 3. The name of the author may not be used to endorse or promote 201592Srgrimes * products derived from this software without specific prior written 211592Srgrimes * permission. 221592Srgrimes * 231592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 241592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 251592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 261592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 271592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 281592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 291592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 301592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 311592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 321592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 331592Srgrimes * SUCH DAMAGE. 341592Srgrimes * 351592Srgrimes * $Id: pam_putenv.c 648 2013-03-05 17:54:27Z des $ 361592Srgrimes */ 371592Srgrimes 381592Srgrimes#ifdef HAVE_CONFIG_H 391592Srgrimes# include "config.h" 401592Srgrimes#endif 411592Srgrimes 421592Srgrimes#include <stdlib.h> 431592Srgrimes#include <string.h> 441592Srgrimes 451592Srgrimes#include <security/pam_appl.h> 461592Srgrimes 471592Srgrimes#include "openpam_impl.h" 481592Srgrimes 491592Srgrimes/* 501592Srgrimes * XSSO 4.2.1 511592Srgrimes * XSSO 6 page 56 521592Srgrimes * 531592Srgrimes * Set the value of an environment variable 541592Srgrimes */ 551592Srgrimes 561592Srgrimesint 571592Srgrimespam_putenv(pam_handle_t *pamh, 581592Srgrimes const char *namevalue) 591592Srgrimes{ 601592Srgrimes char **env, *p; 611592Srgrimes int i; 621592Srgrimes 631592Srgrimes ENTER(); 641592Srgrimes if (pamh == NULL) 651592Srgrimes RETURNC(PAM_SYSTEM_ERR); 661592Srgrimes 671592Srgrimes /* sanity checks */ 681592Srgrimes if (namevalue == NULL || (p = strchr(namevalue, '=')) == NULL) 691592Srgrimes RETURNC(PAM_SYSTEM_ERR); 701592Srgrimes 711592Srgrimes /* see if the variable is already in the environment */ 721592Srgrimes if ((i = openpam_findenv(pamh, namevalue, p - namevalue)) >= 0) { 731592Srgrimes if ((p = strdup(namevalue)) == NULL) 741592Srgrimes RETURNC(PAM_BUF_ERR); 751592Srgrimes FREE(pamh->env[i]); 761592Srgrimes pamh->env[i] = p; 771592Srgrimes RETURNC(PAM_SUCCESS); 781592Srgrimes } 791592Srgrimes 801592Srgrimes /* grow the environment list if necessary */ 811592Srgrimes if (pamh->env_count == pamh->env_size) { 821592Srgrimes env = realloc(pamh->env, 831592Srgrimes sizeof(char *) * (pamh->env_size * 2 + 1)); 841592Srgrimes if (env == NULL) 851592Srgrimes RETURNC(PAM_BUF_ERR); 861592Srgrimes pamh->env = env; 871592Srgrimes pamh->env_size = pamh->env_size * 2 + 1; 881592Srgrimes } 891592Srgrimes 901592Srgrimes /* add the variable at the end */ 911592Srgrimes if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL) 921592Srgrimes RETURNC(PAM_BUF_ERR); 931592Srgrimes ++pamh->env_count; 941592Srgrimes RETURNC(PAM_SUCCESS); 951592Srgrimes} 961592Srgrimes 971592Srgrimes/* 981592Srgrimes * Error codes: 991592Srgrimes * 1001592Srgrimes * PAM_SYSTEM_ERR 1011592Srgrimes * PAM_BUF_ERR 1021592Srgrimes */ 1031592Srgrimes 1041592Srgrimes/** 1051592Srgrimes * The =pam_putenv function sets an environment variable. 1061592Srgrimes * Its semantics are similar to those of =putenv, but it modifies the PAM 1071592Srgrimes * context's environment list instead of the application's. 1081592Srgrimes * 1091592Srgrimes * >pam_getenv 1101592Srgrimes * >pam_getenvlist 1111592Srgrimes * >pam_setenv 1121592Srgrimes */ 1131592Srgrimes