191094Sdes/*- 2115619Sdes * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3228690Sdes * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav 491094Sdes * All rights reserved. 591094Sdes * 691094Sdes * This software was developed for the FreeBSD Project by ThinkSec AS and 799158Sdes * Network Associates Laboratories, the Security Research Division of 899158Sdes * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 999158Sdes * ("CBOSS"), as part of the DARPA CHATS research program. 1091094Sdes * 1191094Sdes * Redistribution and use in source and binary forms, with or without 1291094Sdes * modification, are permitted provided that the following conditions 1391094Sdes * are met: 1491094Sdes * 1. Redistributions of source code must retain the above copyright 1591094Sdes * notice, this list of conditions and the following disclaimer. 1691094Sdes * 2. Redistributions in binary form must reproduce the above copyright 1791094Sdes * notice, this list of conditions and the following disclaimer in the 1891094Sdes * documentation and/or other materials provided with the distribution. 1991094Sdes * 3. The name of the author may not be used to endorse or promote 2091094Sdes * products derived from this software without specific prior written 2191094Sdes * permission. 2291094Sdes * 2391094Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2491094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2591094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2691094Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2791094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2891094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2991094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3091094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3191094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3291094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3391094Sdes * SUCH DAMAGE. 3491094Sdes * 35255376Sdes * $Id: openpam_load.c 664 2013-03-17 10:56:15Z des $ 3691094Sdes */ 3791094Sdes 38228690Sdes#ifdef HAVE_CONFIG_H 39228690Sdes# include "config.h" 40228690Sdes#endif 41228690Sdes 4291094Sdes#include <dlfcn.h> 4391094Sdes#include <stdlib.h> 4491094Sdes#include <string.h> 4591094Sdes 4691094Sdes#include <security/pam_appl.h> 4791094Sdes 4891094Sdes#include "openpam_impl.h" 4991094Sdes 5091094Sdes/* 51174832Sdes * Locate a matching dynamic or static module. 5291094Sdes */ 5391094Sdes 54115619Sdespam_module_t * 55255376Sdesopenpam_load_module(const char *modulename) 5691094Sdes{ 5791094Sdes pam_module_t *module; 5891094Sdes 59255376Sdes module = openpam_dynamic(modulename); 6091094Sdes openpam_log(PAM_LOG_DEBUG, "%s dynamic %s", 61255376Sdes (module == NULL) ? "no" : "using", modulename); 6291094Sdes 6391094Sdes#ifdef OPENPAM_STATIC_MODULES 6491094Sdes /* look for a static module */ 65255376Sdes if (module == NULL && strchr(modulename, '/') == NULL) { 66255376Sdes module = openpam_static(modulename); 6791094Sdes openpam_log(PAM_LOG_DEBUG, "%s static %s", 68255376Sdes (module == NULL) ? "no" : "using", modulename); 6991094Sdes } 7091094Sdes#endif 7191830Sdes if (module == NULL) { 72255376Sdes openpam_log(PAM_LOG_ERROR, "no %s found", modulename); 7391094Sdes return (NULL); 7491830Sdes } 7591094Sdes return (module); 7691094Sdes} 7791094Sdes 7891094Sdes 7991094Sdes/* 8091094Sdes * Release a module. 8191094Sdes * XXX highly thread-unsafe 8291094Sdes */ 8391094Sdes 8491094Sdesstatic void 8591094Sdesopenpam_release_module(pam_module_t *module) 8691094Sdes{ 8791094Sdes if (module == NULL) 8891094Sdes return; 8991094Sdes if (module->dlh == NULL) 9091094Sdes /* static module */ 9191094Sdes return; 9291094Sdes dlclose(module->dlh); 9391830Sdes openpam_log(PAM_LOG_DEBUG, "releasing %s", module->path); 94115619Sdes FREE(module->path); 95115619Sdes FREE(module); 9691094Sdes} 9791094Sdes 9891094Sdes 9991094Sdes/* 10091094Sdes * Destroy a chain, freeing all its links and releasing the modules 10191094Sdes * they point to. 10291094Sdes */ 10391094Sdes 10491094Sdesstatic void 10591094Sdesopenpam_destroy_chain(pam_chain_t *chain) 10691094Sdes{ 10791094Sdes if (chain == NULL) 10891094Sdes return; 10991094Sdes openpam_destroy_chain(chain->next); 11091094Sdes chain->next = NULL; 111236099Sdes FREEV(chain->optc, chain->optv); 11291094Sdes openpam_release_module(chain->module); 113116520Sdes chain->module = NULL; 114115619Sdes FREE(chain); 11591094Sdes} 11691094Sdes 11791094Sdes 11891094Sdes/* 11991094Sdes * Clear the chains and release the modules 12091094Sdes */ 12191094Sdes 12291094Sdesvoid 12395908Sdesopenpam_clear_chains(pam_chain_t *policy[]) 12491094Sdes{ 12591094Sdes int i; 12691094Sdes 127147455Sdes for (i = 0; i < PAM_NUM_FACILITIES; ++i) { 12895908Sdes openpam_destroy_chain(policy[i]); 129147455Sdes policy[i] = NULL; 130147455Sdes } 13191094Sdes} 13291100Sdes 13391100Sdes/* 13491100Sdes * NOPARSE 13591100Sdes */ 136