lib/libcrypto/bio/bss_log.c

   1 /* $OpenBSD: bss_log.c,v 1.22 2018/05/01 13:29:10 tb Exp $ */
   2 /* ====================================================================
   3  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    licensing@OpenSSL.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56 /*
  57         Why BIO_s_log?
  58
  59         BIO_s_log is useful for system daemons (or services under NT).
  60         It is one-way BIO, it sends all stuff to syslogd (on system that
  61         commonly use that), or event log (on NT), or OPCOM (on OpenVMS).
  62
  63 */
  64
  65 #include <errno.h>
  66 #include <stdio.h>
  67 #include <string.h>
  68 #include <syslog.h>
  69
  70 #include <openssl/buffer.h>
  71 #include <openssl/err.h>
  72
  73 #ifndef NO_SYSLOG
  74
  75 static int slg_write(BIO *h, const char *buf, int num);
  76 static int slg_puts(BIO *h, const char *str);
  77 static long slg_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  78 static int slg_new(BIO *h);
  79 static int slg_free(BIO *data);
  80 static void xopenlog(BIO* bp, char* name, int level);
  81 static void xsyslog(BIO* bp, int priority, const char* string);
  82 static void xcloselog(BIO* bp);
  83
  84 static const BIO_METHOD methods_slg = {
  85         .type = BIO_TYPE_MEM,
  86         .name = "syslog",
  87         .bwrite = slg_write,
  88         .bputs = slg_puts,
  89         .ctrl = slg_ctrl,
  90         .create = slg_new,
  91         .destroy = slg_free
  92 };
  93
  94 const BIO_METHOD *
  95 BIO_s_log(void)
  96 {
  97         return (&methods_slg);
  98 }
  99
 100 static int
 101 slg_new(BIO *bi)
 102 {
 103         bi->init = 1;
 104         bi->num = 0;
 105         bi->ptr = NULL;
 106         xopenlog(bi, "application", LOG_DAEMON);
 107         return (1);
 108 }
 109
 110 static int
 111 slg_free(BIO *a)
 112 {
 113         if (a == NULL)
 114                 return (0);
 115         xcloselog(a);
 116         return (1);
 117 }
 118
 119 static int
 120 slg_write(BIO *b, const char *in, int inl)
 121 {
 122         int ret = inl;
 123         char* buf;
 124         char* pp;
 125         int priority, i;
 126         static const struct {
 127                 int strl;
 128                 char str[10];
 129                 int log_level;
 130         }
 131         mapping[] = {
 132                 { 6, "PANIC ", LOG_EMERG },
 133                 { 6, "EMERG ", LOG_EMERG },
 134                 { 4, "EMR ", LOG_EMERG },
 135                 { 6, "ALERT ", LOG_ALERT },
 136                 { 4, "ALR ", LOG_ALERT },
 137                 { 5, "CRIT ", LOG_CRIT },
 138                 { 4, "CRI ", LOG_CRIT },
 139                 { 6, "ERROR ", LOG_ERR },
 140                 { 4, "ERR ", LOG_ERR },
 141                 { 8, "WARNING ", LOG_WARNING },
 142                 { 5, "WARN ", LOG_WARNING },
 143                 { 4, "WAR ", LOG_WARNING },
 144                 { 7, "NOTICE ", LOG_NOTICE },
 145                 { 5, "NOTE ", LOG_NOTICE },
 146                 { 4, "NOT ", LOG_NOTICE },
 147                 { 5, "INFO ", LOG_INFO },
 148                 { 4, "INF ", LOG_INFO },
 149                 { 6, "DEBUG ", LOG_DEBUG },
 150                 { 4, "DBG ", LOG_DEBUG },
 151                 { 0, "", LOG_ERR } /* The default */
 152         };
 153
 154         if ((buf = malloc(inl + 1)) == NULL) {
 155                 return (0);
 156         }
 157         strlcpy(buf, in, inl + 1);
 158         i = 0;
 159         while (strncmp(buf, mapping[i].str, mapping[i].strl) != 0)
 160                 i++;
 161         priority = mapping[i].log_level;
 162         pp = buf + mapping[i].strl;
 163
 164         xsyslog(b, priority, pp);
 165
 166         free(buf);
 167         return (ret);
 168 }
 169
 170 static long
 171 slg_ctrl(BIO *b, int cmd, long num, void *ptr)
 172 {
 173         switch (cmd) {
 174         case BIO_CTRL_SET:
 175                 xcloselog(b);
 176                 xopenlog(b, ptr, num);
 177                 break;
 178         default:
 179                 break;
 180         }
 181         return (0);
 182 }
 183
 184 static int
 185 slg_puts(BIO *bp, const char *str)
 186 {
 187         int n, ret;
 188
 189         n = strlen(str);
 190         ret = slg_write(bp, str, n);
 191         return (ret);
 192 }
 193
 194
 195 static void
 196 xopenlog(BIO* bp, char* name, int level)
 197 {
 198         openlog(name, LOG_PID|LOG_CONS, level);
 199 }
 200
 201 static void
 202 xsyslog(BIO *bp, int priority, const char *string)
 203 {
 204         syslog(priority, "%s", string);
 205 }
 206
 207 static void
 208 xcloselog(BIO* bp)
 209 {
 210         closelog();
 211 }
 212
 213 #endif /* NO_SYSLOG */