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 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 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