conf.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthias Schmidt <matthias@dragonflybsd.org>, University of Marburg,
   6  * Germany.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <syslog.h>
  42 #include <stdarg.h>
  43
  44 #include "dma.h"
  45
  46 #define DP      ": \t"
  47 #define EQS     " \t"
  48
  49
  50 /*
  51  * Remove trailing \n's
  52  */
  53 void
  54 trim_line(char *line)
  55 {
  56         size_t linelen;
  57         char *p;
  58
  59         p = line;
  60
  61         if ((p = strchr(line, '\n')))
  62                 *p = (char)0;
  63
  64         /* Escape leading dot in every case */
  65         linelen = strlen(line);
  66         if (line[0] == '.') {
  67                 if ((linelen + 2) > 1000) {
  68                         syslog(LOG_CRIT, "Cannot escape leading dot.  Buffer overflow");
  69                         exit(1);
  70                 }
  71                 memmove((line + 1), line, (linelen + 1));
  72                 line[0] = '.';
  73         }
  74 }
  75
  76 static void
  77 chomp(char *str)
  78 {
  79         size_t len = strlen(str);
  80
  81         if (len == 0)
  82                 return;
  83         if (str[len - 1] == '\n')
  84                 str[len - 1] = 0;
  85 }
  86
  87 /*
  88  * Read the SMTP authentication config file
  89  *
  90  * file format is:
  91  * user|host:password
  92  *
  93  * A line starting with # is treated as comment and ignored.
  94  */
  95 void
  96 parse_authfile(const char *path)
  97 {
  98         char line[2048];
  99         struct authuser *au;
 100         FILE *a;
 101         char *data;
 102         int lineno = 0;
 103
 104         a = fopen(path, "r");
 105         if (a == NULL) {
 106                 errlog(1, "can not open auth file `%s'", path);
 107                 /* NOTREACHED */
 108         }
 109
 110         while (!feof(a)) {
 111                 if (fgets(line, sizeof(line), a) == NULL)
 112                         break;
 113                 lineno++;
 114
 115                 chomp(line);
 116
 117                 /* We hit a comment */
 118                 if (*line == '#')
 119                         continue;
 120                 /* Ignore empty lines */
 121                 if (*line == 0)
 122                         continue;
 123
 124                 au = calloc(1, sizeof(*au));
 125                 if (au == NULL)
 126                         errlog(1, NULL);
 127
 128                 data = strdup(line);
 129                 au->login = strsep(&data, "|");
 130                 au->host = strsep(&data, DP);
 131                 au->password = data;
 132
 133                 if (au->login == NULL ||
 134                     au->host == NULL ||
 135                     au->password == NULL) {
 136                         errlogx(1, "syntax error in authfile %s:%d",
 137                                 path, lineno);
 138                         /* NOTREACHED */
 139                 }
 140
 141                 SLIST_INSERT_HEAD(&authusers, au, next);
 142         }
 143
 144         fclose(a);
 145 }
 146
 147 /*
 148  * XXX TODO
 149  * Check for bad things[TM]
 150  */
 151 void
 152 parse_conf(const char *config_path)
 153 {
 154         char *word;
 155         char *data;
 156         FILE *conf;
 157         char line[2048];
 158         int lineno = 0;
 159
 160         conf = fopen(config_path, "r");
 161         if (conf == NULL) {
 162                 /* Don't treat a non-existing config file as error */
 163                 if (errno == ENOENT)
 164                         return;
 165                 errlog(1, "can not open config `%s'", config_path);
 166                 /* NOTREACHED */
 167         }
 168
 169         while (!feof(conf)) {
 170                 if (fgets(line, sizeof(line), conf) == NULL)
 171                         break;
 172                 lineno++;
 173
 174                 chomp(line);
 175
 176                 /* We hit a comment */
 177                 if (strchr(line, '#'))
 178                         *strchr(line, '#') = 0;
 179
 180                 data = line;
 181                 word = strsep(&data, EQS);
 182
 183                 /* Ignore empty lines */
 184                 if (word == NULL || *word == 0)
 185                         continue;
 186
 187                 if (data != NULL && *data != 0)
 188                         data = strdup(data);
 189                 else
 190                         data = NULL;
 191
 192                 if (strcmp(word, "SMARTHOST") == 0 && data != NULL)
 193                         config.smarthost = data;
 194                 else if (strcmp(word, "PORT") == 0 && data != NULL)
 195                         config.port = atoi(data);
 196                 else if (strcmp(word, "ALIASES") == 0 && data != NULL)
 197                         config.aliases = data;
 198                 else if (strcmp(word, "SPOOLDIR") == 0 && data != NULL)
 199                         config.spooldir = data;
 200                 else if (strcmp(word, "AUTHPATH") == 0 && data != NULL)
 201                         config.authpath= data;
 202                 else if (strcmp(word, "CERTFILE") == 0 && data != NULL)
 203                         config.certfile = data;
 204                 else if (strcmp(word, "MAILNAME") == 0 && data != NULL)
 205                         config.mailname = data;
 206                 else if (strcmp(word, "MASQUERADE") == 0 && data != NULL) {
 207                         char *user = NULL, *host = NULL;
 208                         if (strrchr(data, '@')) {
 209                                 host = strrchr(data, '@');
 210                                 *host = 0;
 211                                 host++;
 212                                 user = data;
 213                         } else {
 214                                 host = data;
 215                         }
 216                         if (host && *host == 0)
 217                                 host = NULL;
 218                         if (user && *user == 0)
 219                                 user = NULL;
 220                         config.masquerade_host = host;
 221                         config.masquerade_user = user;
 222                 } else if (strcmp(word, "STARTTLS") == 0 && data == NULL)
 223                         config.features |= STARTTLS;
 224                 else if (strcmp(word, "OPPORTUNISTIC_TLS") == 0 && data == NULL)
 225                         config.features |= TLS_OPP;
 226                 else if (strcmp(word, "SECURETRANSFER") == 0 && data == NULL)
 227                         config.features |= SECURETRANS;
 228                 else if (strcmp(word, "DEFER") == 0 && data == NULL)
 229                         config.features |= DEFER;
 230                 else if (strcmp(word, "INSECURE") == 0 && data == NULL)
 231                         config.features |= INSECURE;
 232                 else if (strcmp(word, "FULLBOUNCE") == 0 && data == NULL)
 233                         config.features |= FULLBOUNCE;
 234                 else {
 235                         errlogx(1, "syntax error in %s:%d", config_path, lineno);
 236                         /* NOTREACHED */
 237                 }
 238         }
 239
 240         fclose(conf);
 241 }