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         if ((p = strchr(line, '\n')))
  60                 *p = (char)0;
  61
  62         /* Escape leading dot in every case */
  63         linelen = strlen(line);
  64         if (line[0] == '.') {
  65                 if ((linelen + 2) > 1000) {
  66                         syslog(LOG_CRIT, "Cannot escape leading dot.  Buffer overflow");
  67                         exit(1);
  68                 }
  69                 memmove((line + 1), line, (linelen + 1));
  70                 line[0] = '.';
  71         }
  72 }
  73
  74 static void
  75 chomp(char *str)
  76 {
  77         size_t len = strlen(str);
  78
  79         if (len == 0)
  80                 return;
  81         if (str[len - 1] == '\n')
  82                 str[len - 1] = 0;
  83 }
  84
  85 /*
  86  * Read the SMTP authentication config file
  87  *
  88  * file format is:
  89  * user|host:password
  90  *
  91  * A line starting with # is treated as comment and ignored.
  92  */
  93 void
  94 parse_authfile(const char *path)
  95 {
  96         char line[2048];
  97         struct authuser *au;
  98         FILE *a;
  99         char *data;
 100         int lineno = 0;
 101
 102         a = fopen(path, "r");
 103         if (a == NULL) {
 104                 errlog(1, "can not open auth file `%s'", path);
 105                 /* NOTREACHED */
 106         }
 107
 108         while (!feof(a)) {
 109                 if (fgets(line, sizeof(line), a) == NULL)
 110                         break;
 111                 lineno++;
 112
 113                 chomp(line);
 114
 115                 /* We hit a comment */
 116                 if (*line == '#')
 117                         continue;
 118                 /* Ignore empty lines */
 119                 if (*line == 0)
 120                         continue;
 121
 122                 au = calloc(1, sizeof(*au));
 123                 if (au == NULL)
 124                         errlog(1, NULL);
 125
 126                 data = strdup(line);
 127                 au->login = strsep(&data, "|");
 128                 au->host = strsep(&data, DP);
 129                 au->password = data;
 130
 131                 if (au->login == NULL ||
 132                     au->host == NULL ||
 133                     au->password == NULL) {
 134                         errlogx(1, "syntax error in authfile %s:%d",
 135                                 path, lineno);
 136                         /* NOTREACHED */
 137                 }
 138
 139                 SLIST_INSERT_HEAD(&authusers, au, next);
 140         }
 141
 142         fclose(a);
 143 }
 144
 145 /*
 146  * XXX TODO
 147  * Check for bad things[TM]
 148  */
 149 void
 150 parse_conf(const char *config_path)
 151 {
 152         char *word;
 153         char *data;
 154         FILE *conf;
 155         char line[2048];
 156         int lineno = 0;
 157
 158         conf = fopen(config_path, "r");
 159         if (conf == NULL) {
 160                 /* Don't treat a non-existing config file as error */
 161                 if (errno == ENOENT)
 162                         return;
 163                 errlog(1, "can not open config `%s'", config_path);
 164                 /* NOTREACHED */
 165         }
 166
 167         while (!feof(conf)) {
 168                 if (fgets(line, sizeof(line), conf) == NULL)
 169                         break;
 170                 lineno++;
 171
 172                 chomp(line);
 173
 174                 /* We hit a comment */
 175                 if (strchr(line, '#'))
 176                         *strchr(line, '#') = 0;
 177
 178                 data = line;
 179                 word = strsep(&data, EQS);
 180
 181                 /* Ignore empty lines */
 182                 if (word == NULL || *word == 0)
 183                         continue;
 184
 185                 if (data != NULL && *data != 0)
 186                         data = strdup(data);
 187                 else
 188                         data = NULL;
 189
 190                 if (strcmp(word, "SMARTHOST") == 0 && data != NULL)
 191                         config.smarthost = data;
 192                 else if (strcmp(word, "PORT") == 0 && data != NULL)
 193                         config.port = atoi(data);
 194                 else if (strcmp(word, "ALIASES") == 0 && data != NULL)
 195                         config.aliases = data;
 196                 else if (strcmp(word, "SPOOLDIR") == 0 && data != NULL)
 197                         config.spooldir = data;
 198                 else if (strcmp(word, "AUTHPATH") == 0 && data != NULL)
 199                         config.authpath= data;
 200                 else if (strcmp(word, "CERTFILE") == 0 && data != NULL)
 201                         config.certfile = data;
 202                 else if (strcmp(word, "MAILNAME") == 0 && data != NULL)
 203                         config.mailname = data;
 204                 else if (strcmp(word, "MASQUERADE") == 0 && data != NULL) {
 205                         char *user = NULL, *host = NULL;
 206                         if (strrchr(data, '@')) {
 207                                 host = strrchr(data, '@');
 208                                 *host = 0;
 209                                 host++;
 210                                 user = data;
 211                         } else {
 212                                 host = data;
 213                         }
 214                         if (host && *host == 0)
 215                                 host = NULL;
 216                         if (user && *user == 0)
 217                                 user = NULL;
 218                         config.masquerade_host = host;
 219                         config.masquerade_user = user;
 220                 } else if (strcmp(word, "STARTTLS") == 0 && data == NULL)
 221                         config.features |= STARTTLS;
 222                 else if (strcmp(word, "OPPORTUNISTIC_TLS") == 0 && data == NULL)
 223                         config.features |= TLS_OPP;
 224                 else if (strcmp(word, "SECURETRANSFER") == 0 && data == NULL)
 225                         config.features |= SECURETRANS;
 226                 else if (strcmp(word, "DEFER") == 0 && data == NULL)
 227                         config.features |= DEFER;
 228                 else if (strcmp(word, "INSECURE") == 0 && data == NULL)
 229                         config.features |= INSECURE;
 230                 else if (strcmp(word, "FULLBOUNCE") == 0 && data == NULL)
 231                         config.features |= FULLBOUNCE;
 232                 else {
 233                         errlogx(1, "syntax error in %s:%d", config_path, lineno);
 234                         /* NOTREACHED */
 235                 }
 236         }
 237
 238         fclose(conf);
 239 }