2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * Network Associates Laboratories, the Security Research Division of
7 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the DARPA CHATS research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote
19 * products derived from this software without specific prior written
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $P4: //depot/projects/openpam/lib/openpam_load.c#21 $
41 #include <security/pam_appl.h>
43 #include "openpam_impl.h"
45 const char *_pam_func_name[PAM_NUM_PRIMITIVES] = {
54 const char *_pam_sm_func_name[PAM_NUM_PRIMITIVES] = {
55 "pam_sm_authenticate",
58 "pam_sm_open_session",
59 "pam_sm_close_session",
63 static pam_module_t *modules;
66 * Locate a matching dynamic or static module. Keep a list of previously
67 * found modules to speed up the process.
71 openpam_load_module(const char *path)
75 /* check cache first */
76 for (module = modules; module != NULL; module = module->next)
77 if (strcmp(module->path, path) == 0)
80 /* nope; try to load */
81 module = openpam_dynamic(path);
82 openpam_log(PAM_LOG_DEBUG, "%s dynamic %s",
83 (module == NULL) ? "no" : "using", path);
85 #ifdef OPENPAM_STATIC_MODULES
86 /* look for a static module */
87 if (module == NULL && strchr(path, '/') == NULL) {
88 module = openpam_static(path);
89 openpam_log(PAM_LOG_DEBUG, "%s static %s",
90 (module == NULL) ? "no" : "using", path);
94 openpam_log(PAM_LOG_ERROR, "no %s found", path);
97 openpam_log(PAM_LOG_DEBUG, "adding %s to cache", module->path);
98 module->next = modules;
99 if (module->next != NULL)
100 module->next->prev = module;
111 * XXX highly thread-unsafe
115 openpam_release_module(pam_module_t *module)
120 if (module->refcount > 0)
123 if (module->refcount < 0) {
124 openpam_log(PAM_LOG_ERROR, "module %s has negative refcount",
126 module->refcount = 0;
128 if (module->dlh == NULL)
131 dlclose(module->dlh);
132 if (module->prev != NULL)
133 module->prev->next = module->next;
134 if (module->next != NULL)
135 module->next->prev = module->prev;
136 if (module == modules)
137 modules = module->next;
138 openpam_log(PAM_LOG_DEBUG, "releasing %s", module->path);
145 * Destroy a chain, freeing all its links and releasing the modules
150 openpam_destroy_chain(pam_chain_t *chain)
154 openpam_destroy_chain(chain->next);
156 while (chain->optc) {
158 FREE(chain->optv[chain->optc]);
161 openpam_release_module(chain->module);
162 chain->module = NULL;
168 * Clear the chains and release the modules
172 openpam_clear_chains(pam_chain_t *policy[])
176 for (i = 0; i < PAM_NUM_FACILITIES; ++i) {
177 openpam_destroy_chain(policy[i]);