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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(EX_DATAERR); | |
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(EX_NOINPUT, "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(EX_OSERR, 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(EX_CONFIG, "syntax error in authfile %s:%d", path, lineno); | |
135 | /* NOTREACHED */ | |
136 | } | |
137 | ||
138 | SLIST_INSERT_HEAD(&authusers, au, next); | |
139 | } | |
140 | ||
141 | fclose(a); | |
142 | } | |
143 | ||
144 | /* | |
145 | * XXX TODO | |
146 | * Check for bad things[TM] | |
147 | */ | |
148 | void | |
149 | parse_conf(const char *config_path) | |
150 | { | |
151 | char *word; | |
152 | char *data; | |
153 | FILE *conf; | |
154 | char line[2048]; | |
155 | int lineno = 0; | |
156 | ||
157 | conf = fopen(config_path, "r"); | |
158 | if (conf == NULL) { | |
159 | /* Don't treat a non-existing config file as error */ | |
160 | if (errno == ENOENT) | |
161 | return; | |
162 | errlog(EX_NOINPUT, "can not open config `%s'", config_path); | |
163 | /* NOTREACHED */ | |
164 | } | |
165 | ||
166 | while (!feof(conf)) { | |
167 | if (fgets(line, sizeof(line), conf) == NULL) | |
168 | break; | |
169 | lineno++; | |
170 | ||
171 | chomp(line); | |
172 | ||
173 | /* We hit a comment */ | |
174 | if (strchr(line, '#')) | |
175 | *strchr(line, '#') = 0; | |
176 | ||
177 | data = line; | |
178 | word = strsep(&data, EQS); | |
179 | ||
180 | /* Ignore empty lines */ | |
181 | if (word == NULL || *word == 0) | |
182 | continue; | |
183 | ||
184 | if (data != NULL && *data != 0) | |
185 | data = strdup(data); | |
186 | else | |
187 | data = NULL; | |
188 | ||
189 | if (strcmp(word, "SMARTHOST") == 0 && data != NULL) | |
190 | config.smarthost = data; | |
191 | else if (strcmp(word, "PORT") == 0 && data != NULL) | |
192 | config.port = atoi(data); | |
193 | else if (strcmp(word, "ALIASES") == 0 && data != NULL) | |
194 | config.aliases = data; | |
195 | else if (strcmp(word, "SPOOLDIR") == 0 && data != NULL) | |
196 | config.spooldir = data; | |
197 | else if (strcmp(word, "AUTHPATH") == 0 && data != NULL) | |
198 | config.authpath= data; | |
199 | else if (strcmp(word, "CERTFILE") == 0 && data != NULL) | |
200 | config.certfile = data; | |
201 | else if (strcmp(word, "MAILNAME") == 0 && data != NULL) | |
202 | config.mailname = data; | |
203 | else if (strcmp(word, "MASQUERADE") == 0 && data != NULL) { | |
204 | char *user = NULL, *host = NULL; | |
205 | if (strrchr(data, '@')) { | |
206 | host = strrchr(data, '@'); | |
207 | *host = 0; | |
208 | host++; | |
209 | user = data; | |
210 | } else { | |
211 | host = data; | |
212 | } | |
213 | if (host && *host == 0) | |
214 | host = NULL; | |
215 | if (user && *user == 0) | |
216 | user = NULL; | |
217 | config.masquerade_host = host; | |
218 | config.masquerade_user = user; | |
219 | } else if (strcmp(word, "STARTTLS") == 0 && data == NULL) | |
220 | config.features |= STARTTLS; | |
221 | else if (strcmp(word, "OPPORTUNISTIC_TLS") == 0 && data == NULL) | |
222 | config.features |= TLS_OPP; | |
223 | else if (strcmp(word, "SECURETRANSFER") == 0 && data == NULL) | |
224 | config.features |= SECURETRANS; | |
225 | else if (strcmp(word, "DEFER") == 0 && data == NULL) | |
226 | config.features |= DEFER; | |
227 | else if (strcmp(word, "INSECURE") == 0 && data == NULL) | |
228 | config.features |= INSECURE; | |
229 | else if (strcmp(word, "FULLBOUNCE") == 0 && data == NULL) | |
230 | config.features |= FULLBOUNCE; | |
231 | else if (strcmp(word, "NULLCLIENT") == 0 && data == NULL) | |
232 | config.features |= NULLCLIENT; | |
233 | else { | |
234 | errlogx(EX_CONFIG, "syntax error in %s:%d", config_path, lineno); | |
235 | /* NOTREACHED */ | |
236 | } | |
237 | } | |
238 | ||
239 | if ((config.features & NULLCLIENT) && config.smarthost == NULL) { | |
240 | errlogx(EX_CONFIG, "%s: NULLCLIENT requires SMARTHOST", config_path); | |
241 | /* NOTREACHED */ | |
242 | } | |
243 | ||
244 | fclose(conf); | |
245 | } |