1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2007 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: openpam_log.c 408 2007-12-21 11:36:24Z des $
36 */
37
38#include <ctype.h>
39#include <stdarg.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <syslog.h>
44
45#include <security/pam_appl.h>
46
47#include "openpam_impl.h"
48
49#ifdef OPENPAM_DEBUG
50int _openpam_debug = 1;
51#else
52int _openpam_debug = 0;
53#endif
54
55#if !defined(openpam_log)
56
57/*
58 * OpenPAM extension
59 *
60 * Log a message through syslog
61 */
62
63void
64openpam_log(int level, const char *fmt, ...)
65{
66	va_list ap;
67	int priority;
68
69	switch (level) {
70	case PAM_LOG_LIBDEBUG:
71		if (!_openpam_debug)
72			return;
73	case PAM_LOG_DEBUG:
74		priority = LOG_DEBUG;
75		break;
76	case PAM_LOG_VERBOSE:
77		priority = LOG_INFO;
78		break;
79	case PAM_LOG_NOTICE:
80		priority = LOG_NOTICE;
81		break;
82	case PAM_LOG_ERROR:
83	default:
84		priority = LOG_ERR;
85		break;
86	}
87	va_start(ap, fmt);
88	vsyslog(LOG_AUTHPRIV|priority, fmt, ap);
89	va_end(ap);
90}
91
92#else
93
94void
95_openpam_log(int level, const char *func, const char *fmt, ...)
96{
97	va_list ap;
98	char *format;
99	int priority;
100
101	switch (level) {
102	case PAM_LOG_LIBDEBUG:
103		if (!_openpam_debug)
104			return;
105	case PAM_LOG_DEBUG:
106		priority = LOG_DEBUG;
107		break;
108	case PAM_LOG_VERBOSE:
109		priority = LOG_INFO;
110		break;
111	case PAM_LOG_NOTICE:
112		priority = LOG_NOTICE;
113		break;
114	case PAM_LOG_ERROR:
115	default:
116		priority = LOG_ERR;
117		break;
118	}
119	va_start(ap, fmt);
120	if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
121		vsyslog(LOG_AUTHPRIV|priority, format, ap);
122		FREE(format);
123	} else {
124		vsyslog(LOG_AUTHPRIV|priority, fmt, ap);
125	}
126	va_end(ap);
127}
128
129#endif
130
131/**
132 * The =openpam_log function logs messages using =syslog.
133 * It is primarily intended for internal use by the library and modules.
134 *
135 * The =level argument indicates the importance of the message.
136 * The following levels are defined:
137 *
138 *	=PAM_LOG_DEBUG:
139 *		Debugging messages.
140 *		These messages are logged with a =syslog priority of
141 *		=LOG_DEBUG.
142 *	=PAM_LOG_VERBOSE:
143 *		Information about the progress of the authentication
144 *		process, or other non-essential messages.
145 *		These messages are logged with a =syslog priority of
146 *		=LOG_INFO.
147 *	=PAM_LOG_NOTICE:
148 *		Messages relating to non-fatal errors.
149 *		These messages are logged with a =syslog priority of
150 *		=LOG_NOTICE.
151 *	=PAM_LOG_ERROR:
152 *		Messages relating to serious errors.
153 *		These messages are logged with a =syslog priority of
154 *		=LOG_ERR.
155 *
156 * The remaining arguments are a =printf format string and the
157 * corresponding arguments.
158 */
159