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