1 /* $NetBSD: openpam_get_option.c,v 1.3 2017/05/06 19:50:09 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2011 Dag-Erling Smørgrav 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 * $OpenPAM: openpam_get_option.c 938 2017-04-30 21:34:42Z des $ 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 # include "config.h" 42 #endif 43 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: openpam_get_option.c,v 1.3 2017/05/06 19:50:09 christos Exp $"); 46 47 #include <sys/param.h> 48 49 #include <string.h> 50 51 #include <security/pam_appl.h> 52 53 #include "openpam_impl.h" 54 55 /* 56 * OpenPAM extension 57 * 58 * Returns the value of a module option 59 */ 60 61 const char * 62 openpam_get_option(pam_handle_t *pamh, 63 const char *option) 64 { 65 pam_chain_t *cur; 66 size_t len; 67 int i; 68 69 ENTERS(option); 70 if (pamh == NULL || pamh->current == NULL || option == NULL) 71 RETURNS(NULL); 72 cur = pamh->current; 73 len = strlen(option); 74 for (i = 0; i < cur->optc; ++i) { 75 if (strncmp(cur->optv[i], option, len) == 0) { 76 if (cur->optv[i][len] == '\0') 77 RETURNS(&cur->optv[i][len]); 78 else if (cur->optv[i][len] == '=') 79 RETURNS(&cur->optv[i][len + 1]); 80 } 81 } 82 RETURNS(NULL); 83 } 84 85 /** 86 * The =openpam_get_option function returns the value of the specified 87 * option in the context of the currently executing service module, or 88 * =NULL if the option is not set or no module is currently executing. 89 * 90 * >openpam_set_option 91 */ 92