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 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 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