136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/*-
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* Copyright (c) 2002-2003 Networks Associates Technology, Inc.
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* Copyright (c) 2004-2013 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* Network Associates Laboratories, the Security Research Division of
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* Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <string.h>
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#include <security/pam_appl.h>
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#include "openpam_impl.h"
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/*
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* Locate a matching dynamic or static module.
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*/
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pam_module_t *
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openpam_load_module(const char *modulename)
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{
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pam_module_t *module;
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module = openpam_dynamic(modulename);
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openpam_log(PAM_LOG_DEBUG, "%s dynamic %s",
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(module == NULL) ? "no" : "using", modulename);
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#ifdef OPENPAM_STATIC_MODULES
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/* look for a static module */
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if (module == NULL && strchr(modulename, '/') == NULL) {
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module = openpam_static(modulename);
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openpam_log(PAM_LOG_DEBUG, "%s static %s",
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(module == NULL) ? "no" : "using", modulename);
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}
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#endif
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if (module == NULL) {
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openpam_log(PAM_LOG_ERROR, "no %s found", modulename);
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return (NULL);
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}
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return (module);
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}
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/*
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* Release a module.
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* XXX highly thread-unsafe
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*/
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static void
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openpam_release_module(pam_module_t *module)
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{
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if (module == NULL)
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return;
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if (module->dlh == NULL)
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/* static module */
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return;
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dlclose(module->dlh);
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openpam_log(PAM_LOG_DEBUG, "releasing %s", module->path);
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FREE(module->path);
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FREE(module);
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}
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/*
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* Destroy a chain, freeing all its links and releasing the modules
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* they point to.
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*/
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static void
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openpam_destroy_chain(pam_chain_t *chain)
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{
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if (chain == NULL)
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return;
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openpam_destroy_chain(chain->next);
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chain->next = NULL;
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FREEV(chain->optc, chain->optv);
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openpam_release_module(chain->module);
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chain->module = NULL;
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FREE(chain);
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}
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/*
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* Clear the chains and release the modules
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*/
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void
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openpam_clear_chains(pam_chain_t *policy[])
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{
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int i;
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for (i = 0; i < PAM_NUM_FACILITIES; ++i) {
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openpam_destroy_chain(policy[i]);
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policy[i] = NULL;
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}
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}
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/*
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* NOPARSE
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*/
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