source: openpam/trunk/lib/openpam_dynamic.c @ 417

Last change on this file since 417 was 417, checked in by des, 7 years ago

Update copyright, and coincidentially root out the last remaining vestige
of iso-8859-1 in favor of utf-8.

  • Property svn:keywords set to Id
File size: 3.4 KB
Line 
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2008 Dag-Erling Smørgrav
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
7 * Network Associates Laboratories, the Security Research Division of
8 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $Id$
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <dlfcn.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46
47#include <security/pam_appl.h>
48
49#include "openpam_impl.h"
50
51#ifndef RTLD_NOW
52#define RTLD_NOW RTLD_LAZY
53#endif
54
55/*
56 * OpenPAM internal
57 *
58 * Locate a dynamically linked module
59 */
60
61pam_module_t *
62openpam_dynamic(const char *path)
63{
64        pam_module_t *module;
65        const char *prefix;
66        char *vpath;
67        void *dlh;
68        int i;
69
70        dlh = NULL;
71        if ((module = calloc(1, sizeof *module)) == NULL)
72                goto buf_err;
73
74        /* Prepend the standard prefix if not an absolute pathname. */
75        if (path[0] != '/')
76                prefix = OPENPAM_MODULES_DIR;
77        else
78                prefix = "";
79
80        /* try versioned module first, then unversioned module */
81        if (asprintf(&vpath, "%s%s.%d", prefix, path, LIB_MAJ) < 0)
82                goto buf_err;
83        if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) {
84                openpam_log(PAM_LOG_DEBUG, "%s: %s", vpath, dlerror());
85                *strrchr(vpath, '.') = '\0';
86                if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) {
87                        openpam_log(PAM_LOG_DEBUG, "%s: %s", vpath, dlerror());
88                        FREE(vpath);
89                        FREE(module);
90                        return (NULL);
91                }
92        }
93        FREE(vpath);
94        if ((module->path = strdup(path)) == NULL)
95                goto buf_err;
96        module->dlh = dlh;
97        for (i = 0; i < PAM_NUM_PRIMITIVES; ++i) {
98                module->func[i] = (pam_func_t)dlsym(dlh, _pam_sm_func_name[i]);
99                if (module->func[i] == NULL)
100                        openpam_log(PAM_LOG_DEBUG, "%s: %s(): %s",
101                            path, _pam_sm_func_name[i], dlerror());
102        }
103        return (module);
104 buf_err:
105        openpam_log(PAM_LOG_ERROR, "%m");
106        if (dlh != NULL)
107                dlclose(dlh);
108        FREE(module);
109        return (NULL);
110}
111
112/*
113 * NOPARSE
114 */
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