1 /*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 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 * $OpenPAM: openpam_log.c 938 2017-04-30 21:34:42Z des $
36 */
37
38 #ifdef HAVE_CONFIG_H
39 # include "config.h"
40 #endif
41
42 #include <errno.h>
43 #include <stdarg.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <syslog.h>
47
48 #include <security/pam_appl.h>
49
50 #include "openpam_impl.h"
51 #include "openpam_asprintf.h"
52
53 int openpam_debug = 0;
54
55 #if !defined(openpam_log)
56
57 /*
58 * OpenPAM extension
59 *
60 * Log a message through syslog
61 */
62
63 void
openpam_log(int level,const char * fmt,...)64 openpam_log(int level, const char *fmt, ...)
65 {
66 va_list ap;
67 int priority;
68 int serrno;
69
70 switch (level) {
71 case PAM_LOG_LIBDEBUG:
72 case PAM_LOG_DEBUG:
73 if (!openpam_debug)
74 return;
75 priority = LOG_DEBUG;
76 break;
77 case PAM_LOG_VERBOSE:
78 priority = LOG_INFO;
79 break;
80 case PAM_LOG_NOTICE:
81 priority = LOG_NOTICE;
82 break;
83 case PAM_LOG_ERROR:
84 default:
85 priority = LOG_ERR;
86 break;
87 }
88 serrno = errno;
89 va_start(ap, fmt);
90 vsyslog(priority, fmt, ap);
91 va_end(ap);
92 errno = serrno;
93 }
94
95 #else
96
97 void
_openpam_log(int level,const char * func,const char * fmt,...)98 _openpam_log(int level, const char *func, const char *fmt, ...)
99 {
100 va_list ap;
101 char *format;
102 int priority;
103 int serrno;
104
105 switch (level) {
106 case PAM_LOG_LIBDEBUG:
107 case PAM_LOG_DEBUG:
108 if (!openpam_debug)
109 return;
110 priority = LOG_DEBUG;
111 break;
112 case PAM_LOG_VERBOSE:
113 priority = LOG_INFO;
114 break;
115 case PAM_LOG_NOTICE:
116 priority = LOG_NOTICE;
117 break;
118 case PAM_LOG_ERROR:
119 default:
120 priority = LOG_ERR;
121 break;
122 }
123 serrno = errno;
124 va_start(ap, fmt);
125 if (asprintf(&format, "in %s(): %s", func, fmt) > 0) {
126 errno = serrno;
127 vsyslog(priority, format, ap);
128 FREE(format);
129 } else {
130 errno = serrno;
131 vsyslog(priority, fmt, ap);
132 }
133 va_end(ap);
134 errno = serrno;
135 }
136
137 #endif
138
139 /**
140 * The =openpam_log function logs messages using =syslog.
141 * It is primarily intended for internal use by the library and modules.
142 *
143 * The =level argument indicates the importance of the message.
144 * The following levels are defined:
145 *
146 * =PAM_LOG_LIBDEBUG:
147 * Debugging messages.
148 * For internal use only.
149 * =PAM_LOG_DEBUG:
150 * Debugging messages.
151 * These messages are normally not logged unless the global
152 * integer variable :openpam_debug is set to a non-zero
153 * value, in which case they are logged with a =syslog
154 * priority of =LOG_DEBUG.
155 * =PAM_LOG_VERBOSE:
156 * Information about the progress of the authentication
157 * process, or other non-essential messages.
158 * These messages are logged with a =syslog priority of
159 * =LOG_INFO.
160 * =PAM_LOG_NOTICE:
161 * Messages relating to non-fatal errors.
162 * These messages are logged with a =syslog priority of
163 * =LOG_NOTICE.
164 * =PAM_LOG_ERROR:
165 * Messages relating to serious errors.
166 * These messages are logged with a =syslog priority of
167 * =LOG_ERR.
168 *
169 * The remaining arguments are a =printf format string and the
170 * corresponding arguments.
171 *
172 * The =openpam_log function does not modify the value of :errno.
173 */
174