openpam_log.c revision 186063 
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2007 Dag-Erling Sm��rgrav
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_DEBUG:
71		if (!_openpam_debug)
72			return;
73		priority = LOG_DEBUG;
74		break;
75	case PAM_LOG_VERBOSE:
76		priority = LOG_INFO;
77		break;
78	case PAM_LOG_NOTICE:
79		priority = LOG_NOTICE;
80		break;
81	case PAM_LOG_ERROR:
82	default:
83		priority = LOG_ERR;
84		break;
85	}
86	va_start(ap, fmt);
87	vsyslog(priority, fmt, ap);
88	va_end(ap);
89}
90
91#else
92
93void
94_openpam_log(int level, const char *func, const char *fmt, ...)
95{
96	va_list ap;
97	char *format;
98	int priority;
99
100	switch (level) {
101	case PAM_LOG_DEBUG:
102		if (!_openpam_debug)
103			return;
104		priority = LOG_DEBUG;
105		break;
106	case PAM_LOG_VERBOSE:
107		priority = LOG_INFO;
108		break;
109	case PAM_LOG_NOTICE:
110		priority = LOG_NOTICE;
111		break;
112	case PAM_LOG_ERROR:
113	default:
114		priority = LOG_ERR;
115		break;
116	}
117	va_start(ap, fmt);
118	if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
119		vsyslog(priority, format, ap);
120		FREE(format);
121	} else {
122		vsyslog(priority, fmt, ap);
123	}
124	va_end(ap);
125}
126
127#endif
128
129/**
130 * The =openpam_log function logs messages using =syslog.
131 * It is primarily intended for internal use by the library and modules.
132 *
133 * The =level argument indicates the importance of the message.
134 * The following levels are defined:
135 *
136 *	=PAM_LOG_DEBUG:
137 *		Debugging messages.
138 *		These messages are normally not logged unless the global
139 *		integer variable :_openpam_debug is set to a non-zero
140 *		value, in which case they are logged with a =syslog
141 *		priority of =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