Commit | Line | Data |
---|---|---|
dc082449 | 1 | /* $Cambridge: exim/src/src/acl.c,v 1.16 2005/01/12 14:41:12 ph10 Exp $ */ |
059ec3d9 PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
059ec3d9 PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | /* Code for handling Access Control Lists (ACLs) */ | |
11 | ||
12 | #include "exim.h" | |
13 | ||
14 | ||
15 | /* Default callout timeout */ | |
16 | ||
17 | #define CALLOUT_TIMEOUT_DEFAULT 30 | |
18 | ||
19 | /* ACL verb codes - keep in step with the table of verbs that follows */ | |
20 | ||
21 | enum { ACL_ACCEPT, ACL_DEFER, ACL_DENY, ACL_DISCARD, ACL_DROP, ACL_REQUIRE, | |
22 | ACL_WARN }; | |
23 | ||
24 | /* ACL verbs */ | |
25 | ||
26 | static uschar *verbs[] = | |
27 | { US"accept", US"defer", US"deny", US"discard", US"drop", US"require", | |
28 | US"warn" }; | |
29 | ||
30 | /* For each verb, the condition for which "message" is used */ | |
31 | ||
32 | static int msgcond[] = { FAIL, OK, OK, FAIL, OK, FAIL, OK }; | |
33 | ||
34 | /* ACL condition and modifier codes - keep in step with the table that | |
35 | follows. */ | |
36 | ||
8523533c TK |
37 | enum { ACLC_ACL, ACLC_AUTHENTICATED, |
38 | #ifdef EXPERIMENTAL_BRIGHTMAIL | |
39 | ACLC_BMI_OPTIN, | |
40 | #endif | |
41 | ACLC_CONDITION, ACLC_CONTROL, | |
42 | #ifdef WITH_CONTENT_SCAN | |
43 | ACLC_DECODE, | |
44 | #endif | |
45 | ACLC_DELAY, | |
46 | #ifdef WITH_OLD_DEMIME | |
47 | ACLC_DEMIME, | |
48 | #endif | |
49 | ACLC_DNSLISTS, ACLC_DOMAINS, ACLC_ENCRYPTED, ACLC_ENDPASS, | |
50 | ACLC_HOSTS, ACLC_LOCAL_PARTS, ACLC_LOG_MESSAGE, ACLC_LOGWRITE, | |
51 | #ifdef WITH_CONTENT_SCAN | |
52 | ACLC_MALWARE, | |
53 | #endif | |
54 | ACLC_MESSAGE, | |
55 | #ifdef WITH_CONTENT_SCAN | |
56 | ACLC_MIME_REGEX, | |
57 | #endif | |
58 | ACLC_RECIPIENTS, | |
59 | #ifdef WITH_CONTENT_SCAN | |
60 | ACLC_REGEX, | |
61 | #endif | |
62 | ACLC_SENDER_DOMAINS, ACLC_SENDERS, ACLC_SET, | |
63 | #ifdef WITH_CONTENT_SCAN | |
64 | ACLC_SPAM, | |
65 | #endif | |
66 | #ifdef EXPERIMENTAL_SPF | |
67 | ACLC_SPF, | |
68 | #endif | |
69 | ACLC_VERIFY }; | |
059ec3d9 PH |
70 | |
71 | /* ACL conditions/modifiers: "delay", "control", "endpass", "message", | |
72 | "log_message", "logwrite", and "set" are modifiers that look like conditions | |
73 | but always return TRUE. They are used for their side effects. */ | |
74 | ||
8523533c TK |
75 | static uschar *conditions[] = { US"acl", US"authenticated", |
76 | #ifdef EXPERIMENTAL_BRIGHTMAIL | |
77 | US"bmi_optin", | |
78 | #endif | |
79 | US"condition", | |
80 | US"control", | |
81 | #ifdef WITH_CONTENT_SCAN | |
82 | US"decode", | |
83 | #endif | |
84 | US"delay", | |
85 | #ifdef WITH_OLD_DEMIME | |
86 | US"demime", | |
87 | #endif | |
88 | US"dnslists", US"domains", US"encrypted", | |
059ec3d9 | 89 | US"endpass", US"hosts", US"local_parts", US"log_message", US"logwrite", |
8523533c TK |
90 | #ifdef WITH_CONTENT_SCAN |
91 | US"malware", | |
92 | #endif | |
93 | US"message", | |
94 | #ifdef WITH_CONTENT_SCAN | |
95 | US"mime_regex", | |
96 | #endif | |
97 | US"recipients", | |
98 | #ifdef WITH_CONTENT_SCAN | |
99 | US"regex", | |
100 | #endif | |
101 | US"sender_domains", US"senders", US"set", | |
102 | #ifdef WITH_CONTENT_SCAN | |
103 | US"spam", | |
104 | #endif | |
105 | #ifdef EXPERIMENTAL_SPF | |
106 | US"spf", | |
107 | #endif | |
059ec3d9 | 108 | US"verify" }; |
c5fcb476 PH |
109 | |
110 | /* ACL control names */ | |
111 | ||
112 | static uschar *controls[] = { US"error", US"caseful_local_part", | |
113 | US"caselower_local_part", US"enforce_sync", US"no_enforce_sync", US"freeze", | |
114 | US"queue_only", US"submission", US"no_multiline"}; | |
059ec3d9 PH |
115 | |
116 | /* Flags to indicate for which conditions /modifiers a string expansion is done | |
117 | at the outer level. In the other cases, expansion already occurs in the | |
118 | checking functions. */ | |
119 | ||
120 | static uschar cond_expand_at_top[] = { | |
121 | TRUE, /* acl */ | |
122 | FALSE, /* authenticated */ | |
8523533c TK |
123 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
124 | TRUE, /* bmi_optin */ | |
125 | #endif | |
059ec3d9 PH |
126 | TRUE, /* condition */ |
127 | TRUE, /* control */ | |
8523533c TK |
128 | #ifdef WITH_CONTENT_SCAN |
129 | TRUE, /* decode */ | |
130 | #endif | |
059ec3d9 | 131 | TRUE, /* delay */ |
8523533c TK |
132 | #ifdef WITH_OLD_DEMIME |
133 | TRUE, /* demime */ | |
134 | #endif | |
059ec3d9 PH |
135 | TRUE, /* dnslists */ |
136 | FALSE, /* domains */ | |
137 | FALSE, /* encrypted */ | |
138 | TRUE, /* endpass */ | |
139 | FALSE, /* hosts */ | |
140 | FALSE, /* local_parts */ | |
141 | TRUE, /* log_message */ | |
142 | TRUE, /* logwrite */ | |
8523533c TK |
143 | #ifdef WITH_CONTENT_SCAN |
144 | TRUE, /* malware */ | |
145 | #endif | |
059ec3d9 | 146 | TRUE, /* message */ |
8523533c TK |
147 | #ifdef WITH_CONTENT_SCAN |
148 | TRUE, /* mime_regex */ | |
149 | #endif | |
059ec3d9 | 150 | FALSE, /* recipients */ |
8523533c TK |
151 | #ifdef WITH_CONTENT_SCAN |
152 | TRUE, /* regex */ | |
153 | #endif | |
059ec3d9 PH |
154 | FALSE, /* sender_domains */ |
155 | FALSE, /* senders */ | |
156 | TRUE, /* set */ | |
8523533c TK |
157 | #ifdef WITH_CONTENT_SCAN |
158 | TRUE, /* spam */ | |
159 | #endif | |
160 | #ifdef EXPERIMENTAL_SPF | |
161 | TRUE, /* spf */ | |
162 | #endif | |
059ec3d9 PH |
163 | TRUE /* verify */ |
164 | }; | |
165 | ||
166 | /* Flags to identify the modifiers */ | |
167 | ||
168 | static uschar cond_modifiers[] = { | |
169 | FALSE, /* acl */ | |
170 | FALSE, /* authenticated */ | |
8523533c TK |
171 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
172 | TRUE, /* bmi_optin */ | |
173 | #endif | |
059ec3d9 PH |
174 | FALSE, /* condition */ |
175 | TRUE, /* control */ | |
8523533c TK |
176 | #ifdef WITH_CONTENT_SCAN |
177 | FALSE, /* decode */ | |
178 | #endif | |
059ec3d9 | 179 | TRUE, /* delay */ |
8523533c TK |
180 | #ifdef WITH_OLD_DEMIME |
181 | FALSE, /* demime */ | |
182 | #endif | |
059ec3d9 PH |
183 | FALSE, /* dnslists */ |
184 | FALSE, /* domains */ | |
185 | FALSE, /* encrypted */ | |
186 | TRUE, /* endpass */ | |
187 | FALSE, /* hosts */ | |
188 | FALSE, /* local_parts */ | |
189 | TRUE, /* log_message */ | |
8523533c TK |
190 | TRUE, /* logwrite */ |
191 | #ifdef WITH_CONTENT_SCAN | |
192 | FALSE, /* malware */ | |
193 | #endif | |
059ec3d9 | 194 | TRUE, /* message */ |
8523533c TK |
195 | #ifdef WITH_CONTENT_SCAN |
196 | FALSE, /* mime_regex */ | |
197 | #endif | |
059ec3d9 | 198 | FALSE, /* recipients */ |
8523533c TK |
199 | #ifdef WITH_CONTENT_SCAN |
200 | FALSE, /* regex */ | |
201 | #endif | |
059ec3d9 PH |
202 | FALSE, /* sender_domains */ |
203 | FALSE, /* senders */ | |
204 | TRUE, /* set */ | |
8523533c TK |
205 | #ifdef WITH_CONTENT_SCAN |
206 | FALSE, /* spam */ | |
207 | #endif | |
208 | #ifdef EXPERIMENTAL_SPF | |
209 | FALSE, /* spf */ | |
210 | #endif | |
059ec3d9 PH |
211 | FALSE /* verify */ |
212 | }; | |
213 | ||
c5fcb476 PH |
214 | /* Bit map vector of which conditions are not allowed at certain times. For |
215 | each condition, there's a bitmap of dis-allowed times. */ | |
059ec3d9 PH |
216 | |
217 | static unsigned int cond_forbids[] = { | |
218 | 0, /* acl */ | |
3e11c26b | 219 | |
059ec3d9 PH |
220 | (1<<ACL_WHERE_NOTSMTP)|(1<<ACL_WHERE_CONNECT)| /* authenticated */ |
221 | (1<<ACL_WHERE_HELO), | |
8523533c TK |
222 | |
223 | #ifdef EXPERIMENTAL_BRIGHTMAIL | |
3864bb8e | 224 | (1<<ACL_WHERE_AUTH)| /* bmi_optin */ |
8523533c TK |
225 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
226 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_MIME)| | |
227 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
228 | (1<<ACL_WHERE_MAILAUTH)| | |
229 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
230 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_PREDATA), | |
231 | #endif | |
232 | ||
059ec3d9 | 233 | 0, /* condition */ |
8523533c | 234 | |
059ec3d9 PH |
235 | /* Certain types of control are always allowed, so we let it through |
236 | always and check in the control processing itself */ | |
8523533c | 237 | |
059ec3d9 | 238 | 0, /* control */ |
8523533c TK |
239 | |
240 | #ifdef WITH_CONTENT_SCAN | |
3864bb8e | 241 | (1<<ACL_WHERE_AUTH)| /* decode */ |
8523533c TK |
242 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
243 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_PREDATA)| | |
244 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
245 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
246 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
247 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_RCPT), | |
248 | #endif | |
249 | ||
059ec3d9 | 250 | 0, /* delay */ |
8523533c | 251 | |
f7b63901 | 252 | #ifdef WITH_OLD_DEMIME |
3864bb8e | 253 | (1<<ACL_WHERE_AUTH)| /* demime */ |
8523533c TK |
254 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
255 | (1<<ACL_WHERE_RCPT)|(1<<ACL_WHERE_PREDATA)| | |
256 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
257 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
258 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
259 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_MIME), | |
260 | #endif | |
261 | ||
059ec3d9 PH |
262 | (1<<ACL_WHERE_NOTSMTP), /* dnslists */ |
263 | ||
264 | (1<<ACL_WHERE_NOTSMTP)|(1<<ACL_WHERE_AUTH)| /* domains */ | |
265 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| | |
266 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_PREDATA)| | |
267 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
268 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
269 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
270 | (1<<ACL_WHERE_VRFY), | |
271 | ||
272 | (1<<ACL_WHERE_NOTSMTP)|(1<<ACL_WHERE_CONNECT)| /* encrypted */ | |
273 | (1<<ACL_WHERE_HELO), | |
3e11c26b | 274 | |
059ec3d9 | 275 | 0, /* endpass */ |
3e11c26b | 276 | |
059ec3d9 PH |
277 | (1<<ACL_WHERE_NOTSMTP), /* hosts */ |
278 | ||
279 | (1<<ACL_WHERE_NOTSMTP)|(1<<ACL_WHERE_AUTH)| /* local_parts */ | |
280 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| | |
281 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_PREDATA)| | |
282 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
283 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
284 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
285 | (1<<ACL_WHERE_VRFY), | |
286 | ||
287 | 0, /* log_message */ | |
3e11c26b | 288 | |
059ec3d9 | 289 | 0, /* logwrite */ |
8523533c TK |
290 | |
291 | #ifdef WITH_CONTENT_SCAN | |
3864bb8e | 292 | (1<<ACL_WHERE_AUTH)| /* malware */ |
8523533c TK |
293 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
294 | (1<<ACL_WHERE_RCPT)|(1<<ACL_WHERE_PREDATA)| | |
295 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
296 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
297 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
298 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_MIME), | |
299 | #endif | |
300 | ||
059ec3d9 PH |
301 | 0, /* message */ |
302 | ||
8523533c | 303 | #ifdef WITH_CONTENT_SCAN |
3864bb8e | 304 | (1<<ACL_WHERE_AUTH)| /* mime_regex */ |
8523533c TK |
305 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
306 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_PREDATA)| | |
307 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
308 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
309 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
310 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_RCPT), | |
311 | #endif | |
312 | ||
059ec3d9 PH |
313 | (1<<ACL_WHERE_NOTSMTP)|(1<<ACL_WHERE_AUTH)| /* recipients */ |
314 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| | |
315 | (1<<ACL_WHERE_DATA)|(1<<ACL_WHERE_PREDATA)| | |
316 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
317 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
318 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
319 | (1<<ACL_WHERE_VRFY), | |
320 | ||
8523533c | 321 | #ifdef WITH_CONTENT_SCAN |
3864bb8e | 322 | (1<<ACL_WHERE_AUTH)| /* regex */ |
8523533c TK |
323 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
324 | (1<<ACL_WHERE_RCPT)|(1<<ACL_WHERE_PREDATA)| | |
325 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
326 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
327 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
328 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_MIME), | |
329 | #endif | |
330 | ||
059ec3d9 PH |
331 | (1<<ACL_WHERE_AUTH)|(1<<ACL_WHERE_CONNECT)| /* sender_domains */ |
332 | (1<<ACL_WHERE_HELO)| | |
333 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
334 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
335 | (1<<ACL_WHERE_STARTTLS)|(1<<ACL_WHERE_VRFY), | |
336 | ||
337 | (1<<ACL_WHERE_AUTH)|(1<<ACL_WHERE_CONNECT)| /* senders */ | |
338 | (1<<ACL_WHERE_HELO)| | |
339 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
340 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
341 | (1<<ACL_WHERE_STARTTLS)|(1<<ACL_WHERE_VRFY), | |
342 | ||
343 | 0, /* set */ | |
344 | ||
8523533c | 345 | #ifdef WITH_CONTENT_SCAN |
3864bb8e | 346 | (1<<ACL_WHERE_AUTH)| /* spam */ |
8523533c TK |
347 | (1<<ACL_WHERE_CONNECT)|(1<<ACL_WHERE_HELO)| |
348 | (1<<ACL_WHERE_RCPT)|(1<<ACL_WHERE_PREDATA)| | |
349 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
350 | (1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)| | |
351 | (1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_STARTTLS)| | |
352 | (1<<ACL_WHERE_VRFY)|(1<<ACL_WHERE_MIME), | |
353 | #endif | |
354 | ||
355 | #ifdef EXPERIMENTAL_SPF | |
356 | (1<<ACL_WHERE_AUTH)|(1<<ACL_WHERE_CONNECT)| /* spf */ | |
357 | (1<<ACL_WHERE_HELO)| | |
358 | (1<<ACL_WHERE_MAILAUTH)| | |
359 | (1<<ACL_WHERE_ETRN)|(1<<ACL_WHERE_EXPN)| | |
360 | (1<<ACL_WHERE_STARTTLS)|(1<<ACL_WHERE_VRFY), | |
361 | #endif | |
362 | ||
059ec3d9 PH |
363 | /* Certain types of verify are always allowed, so we let it through |
364 | always and check in the verify function itself */ | |
365 | ||
366 | 0 /* verify */ | |
059ec3d9 PH |
367 | }; |
368 | ||
369 | ||
370 | /* Return values from decode_control() */ | |
371 | ||
8523533c TK |
372 | enum { |
373 | #ifdef EXPERIMENTAL_BRIGHTMAIL | |
374 | CONTROL_BMI_RUN, | |
375 | #endif | |
376 | CONTROL_ERROR, CONTROL_CASEFUL_LOCAL_PART, CONTROL_CASELOWER_LOCAL_PART, | |
059ec3d9 | 377 | CONTROL_ENFORCE_SYNC, CONTROL_NO_ENFORCE_SYNC, CONTROL_FREEZE, |
8523533c TK |
378 | CONTROL_QUEUE_ONLY, CONTROL_SUBMISSION, |
379 | #ifdef WITH_CONTENT_SCAN | |
0f9b0483 | 380 | CONTROL_NO_MBOX_UNSPOOL, |
8523533c | 381 | #endif |
0f9b0483 | 382 | CONTROL_FAKEREJECT, CONTROL_NO_MULTILINE }; |
059ec3d9 | 383 | |
c5fcb476 PH |
384 | /* Bit map vector of which controls are not allowed at certain times. For |
385 | each control, there's a bitmap of dis-allowed times. For some, it is easier to | |
386 | specify the negation of a small number of allowed times. */ | |
387 | ||
388 | static unsigned int control_forbids[] = { | |
8523533c TK |
389 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
390 | 0, /* bmi_run */ | |
391 | #endif | |
3e11c26b | 392 | |
c5fcb476 | 393 | 0, /* error */ |
3e11c26b PH |
394 | |
395 | (unsigned int) | |
c5fcb476 | 396 | ~(1<<ACL_WHERE_RCPT), /* caseful_local_part */ |
3e11c26b PH |
397 | |
398 | (unsigned int) | |
c5fcb476 | 399 | ~(1<<ACL_WHERE_RCPT), /* caselower_local_part */ |
3e11c26b | 400 | |
c5fcb476 | 401 | (1<<ACL_WHERE_NOTSMTP), /* enforce_sync */ |
3e11c26b | 402 | |
c5fcb476 PH |
403 | (1<<ACL_WHERE_NOTSMTP), /* no_enforce_sync */ |
404 | ||
3e11c26b | 405 | (unsigned int) |
c5fcb476 PH |
406 | ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* freeze */ |
407 | (1<<ACL_WHERE_PREDATA)|(1<<ACL_WHERE_DATA)| | |
408 | (1<<ACL_WHERE_NOTSMTP)), | |
409 | ||
3e11c26b | 410 | (unsigned int) |
c5fcb476 PH |
411 | ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* queue_only */ |
412 | (1<<ACL_WHERE_PREDATA)|(1<<ACL_WHERE_DATA)| | |
413 | (1<<ACL_WHERE_NOTSMTP)), | |
414 | ||
3e11c26b | 415 | (unsigned int) |
c5fcb476 PH |
416 | ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* submission */ |
417 | (1<<ACL_WHERE_PREDATA)), | |
8523533c TK |
418 | |
419 | #ifdef WITH_CONTENT_SCAN | |
14d57970 PH |
420 | (unsigned int) |
421 | ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* no_mbox_unspool */ | |
422 | (1<<ACL_WHERE_PREDATA)|(1<<ACL_WHERE_DATA)), | |
8523533c | 423 | #endif |
a6c4ab60 | 424 | |
3e11c26b | 425 | (unsigned int) |
a6c4ab60 PH |
426 | ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* fakereject */ |
427 | (1<<ACL_WHERE_PREDATA)|(1<<ACL_WHERE_DATA)), | |
8523533c | 428 | |
c5fcb476 PH |
429 | (1<<ACL_WHERE_NOTSMTP) /* no_multiline */ |
430 | }; | |
431 | ||
432 | /* Structure listing various control arguments, with their characteristics. */ | |
059ec3d9 PH |
433 | |
434 | typedef struct control_def { | |
435 | uschar *name; | |
436 | int value; /* CONTROL_xxx value */ | |
059ec3d9 PH |
437 | BOOL has_option; /* Has /option(s) following */ |
438 | } control_def; | |
439 | ||
440 | static control_def controls_list[] = { | |
8523533c TK |
441 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
442 | { US"bmi_run", CONTROL_BMI_RUN, FALSE}, | |
443 | #endif | |
c5fcb476 PH |
444 | { US"caseful_local_part", CONTROL_CASEFUL_LOCAL_PART, FALSE}, |
445 | { US"caselower_local_part", CONTROL_CASELOWER_LOCAL_PART, FALSE}, | |
446 | { US"enforce_sync", CONTROL_ENFORCE_SYNC, FALSE}, | |
447 | { US"freeze", CONTROL_FREEZE, FALSE}, | |
448 | { US"no_enforce_sync", CONTROL_NO_ENFORCE_SYNC, FALSE}, | |
449 | { US"no_multiline_responses", CONTROL_NO_MULTILINE, FALSE}, | |
450 | { US"queue_only", CONTROL_QUEUE_ONLY, FALSE}, | |
8523533c TK |
451 | #ifdef WITH_CONTENT_SCAN |
452 | { US"no_mbox_unspool", CONTROL_NO_MBOX_UNSPOOL, FALSE}, | |
8523533c | 453 | #endif |
0f9b0483 | 454 | { US"fakereject", CONTROL_FAKEREJECT, TRUE}, |
c5fcb476 | 455 | { US"submission", CONTROL_SUBMISSION, TRUE} |
059ec3d9 PH |
456 | }; |
457 | ||
458 | /* Enable recursion between acl_check_internal() and acl_check_condition() */ | |
459 | ||
460 | static int acl_check_internal(int, address_item *, uschar *, int, uschar **, | |
461 | uschar **); | |
462 | ||
463 | ||
464 | /************************************************* | |
465 | * Pick out name from list * | |
466 | *************************************************/ | |
467 | ||
468 | /* Use a binary chop method | |
469 | ||
470 | Arguments: | |
471 | name name to find | |
472 | list list of names | |
473 | end size of list | |
474 | ||
475 | Returns: offset in list, or -1 if not found | |
476 | */ | |
477 | ||
478 | static int | |
479 | acl_checkname(uschar *name, uschar **list, int end) | |
480 | { | |
481 | int start = 0; | |
482 | ||
483 | while (start < end) | |
484 | { | |
485 | int mid = (start + end)/2; | |
486 | int c = Ustrcmp(name, list[mid]); | |
487 | if (c == 0) return mid; | |
488 | if (c < 0) end = mid; else start = mid + 1; | |
489 | } | |
490 | ||
491 | return -1; | |
492 | } | |
493 | ||
494 | ||
495 | /************************************************* | |
496 | * Read and parse one ACL * | |
497 | *************************************************/ | |
498 | ||
499 | /* This function is called both from readconf in order to parse the ACLs in the | |
500 | configuration file, and also when an ACL is encountered dynamically (e.g. as | |
501 | the result of an expansion). It is given a function to call in order to | |
502 | retrieve the lines of the ACL. This function handles skipping comments and | |
503 | blank lines (where relevant). | |
504 | ||
505 | Arguments: | |
506 | func function to get next line of ACL | |
507 | error where to put an error message | |
508 | ||
509 | Returns: pointer to ACL, or NULL | |
510 | NULL can be legal (empty ACL); in this case error will be NULL | |
511 | */ | |
512 | ||
513 | acl_block * | |
514 | acl_read(uschar *(*func)(void), uschar **error) | |
515 | { | |
516 | acl_block *yield = NULL; | |
517 | acl_block **lastp = &yield; | |
518 | acl_block *this = NULL; | |
519 | acl_condition_block *cond; | |
520 | acl_condition_block **condp = NULL; | |
521 | uschar *s; | |
522 | ||
523 | *error = NULL; | |
524 | ||
525 | while ((s = (*func)()) != NULL) | |
526 | { | |
527 | int v, c; | |
528 | BOOL negated = FALSE; | |
529 | uschar *saveline = s; | |
530 | uschar name[64]; | |
531 | ||
532 | /* Conditions (but not verbs) are allowed to be negated by an initial | |
533 | exclamation mark. */ | |
534 | ||
535 | while (isspace(*s)) s++; | |
536 | if (*s == '!') | |
537 | { | |
538 | negated = TRUE; | |
539 | s++; | |
540 | } | |
541 | ||
542 | /* Read the name of a verb or a condition, or the start of a new ACL */ | |
543 | ||
544 | s = readconf_readname(name, sizeof(name), s); | |
545 | if (*s == ':') | |
546 | { | |
547 | if (negated || name[0] == 0) | |
548 | { | |
549 | *error = string_sprintf("malformed ACL name in \"%s\"", saveline); | |
550 | return NULL; | |
551 | } | |
552 | break; | |
553 | } | |
554 | ||
555 | /* If a verb is unrecognized, it may be another condition or modifier that | |
556 | continues the previous verb. */ | |
557 | ||
558 | v = acl_checkname(name, verbs, sizeof(verbs)/sizeof(char *)); | |
559 | if (v < 0) | |
560 | { | |
561 | if (this == NULL) | |
562 | { | |
563 | *error = string_sprintf("unknown ACL verb in \"%s\"", saveline); | |
564 | return NULL; | |
565 | } | |
566 | } | |
567 | ||
568 | /* New verb */ | |
569 | ||
570 | else | |
571 | { | |
572 | if (negated) | |
573 | { | |
574 | *error = string_sprintf("malformed ACL line \"%s\"", saveline); | |
575 | return NULL; | |
576 | } | |
577 | this = store_get(sizeof(acl_block)); | |
578 | *lastp = this; | |
579 | lastp = &(this->next); | |
580 | this->next = NULL; | |
581 | this->verb = v; | |
582 | this->condition = NULL; | |
583 | condp = &(this->condition); | |
584 | if (*s == 0) continue; /* No condition on this line */ | |
585 | if (*s == '!') | |
586 | { | |
587 | negated = TRUE; | |
588 | s++; | |
589 | } | |
590 | s = readconf_readname(name, sizeof(name), s); /* Condition name */ | |
591 | } | |
592 | ||
593 | /* Handle a condition or modifier. */ | |
594 | ||
595 | c = acl_checkname(name, conditions, sizeof(conditions)/sizeof(char *)); | |
596 | if (c < 0) | |
597 | { | |
598 | *error = string_sprintf("unknown ACL condition/modifier in \"%s\"", | |
599 | saveline); | |
600 | return NULL; | |
601 | } | |
602 | ||
603 | /* The modifiers may not be negated */ | |
604 | ||
605 | if (negated && cond_modifiers[c]) | |
606 | { | |
607 | *error = string_sprintf("ACL error: negation is not allowed with " | |
608 | "\"%s\"", conditions[c]); | |
609 | return NULL; | |
610 | } | |
611 | ||
612 | /* ENDPASS may occur only with ACCEPT or DISCARD. */ | |
613 | ||
614 | if (c == ACLC_ENDPASS && | |
615 | this->verb != ACL_ACCEPT && | |
616 | this->verb != ACL_DISCARD) | |
617 | { | |
618 | *error = string_sprintf("ACL error: \"%s\" is not allowed with \"%s\"", | |
619 | conditions[c], verbs[this->verb]); | |
620 | return NULL; | |
621 | } | |
622 | ||
623 | cond = store_get(sizeof(acl_condition_block)); | |
624 | cond->next = NULL; | |
625 | cond->type = c; | |
626 | cond->u.negated = negated; | |
627 | ||
628 | *condp = cond; | |
629 | condp = &(cond->next); | |
630 | ||
631 | /* The "set" modifier is different in that its argument is "name=value" | |
632 | rather than just a value, and we can check the validity of the name, which | |
633 | gives us a variable number to insert into the data block. */ | |
634 | ||
635 | if (c == ACLC_SET) | |
636 | { | |
637 | if (Ustrncmp(s, "acl_", 4) != 0 || (s[4] != 'c' && s[4] != 'm') || | |
638 | !isdigit(s[5]) || (!isspace(s[6]) && s[6] != '=')) | |
639 | { | |
640 | *error = string_sprintf("unrecognized name after \"set\" in ACL " | |
641 | "modifier \"set %s\"", s); | |
642 | return NULL; | |
643 | } | |
644 | ||
645 | cond->u.varnumber = s[5] - '0'; | |
646 | if (s[4] == 'm') cond->u.varnumber += ACL_C_MAX; | |
647 | s += 6; | |
648 | while (isspace(*s)) s++; | |
649 | } | |
650 | ||
651 | /* For "set", we are now positioned for the data. For the others, only | |
652 | "endpass" has no data */ | |
653 | ||
654 | if (c != ACLC_ENDPASS) | |
655 | { | |
656 | if (*s++ != '=') | |
657 | { | |
658 | *error = string_sprintf("\"=\" missing after ACL \"%s\" %s", name, | |
659 | cond_modifiers[c]? US"modifier" : US"condition"); | |
660 | return NULL; | |
661 | } | |
662 | while (isspace(*s)) s++; | |
663 | cond->arg = string_copy(s); | |
664 | } | |
665 | } | |
666 | ||
667 | return yield; | |
668 | } | |
669 | ||
670 | ||
671 | ||
672 | /************************************************* | |
673 | * Handle warnings * | |
674 | *************************************************/ | |
675 | ||
676 | /* This function is called when a WARN verb's conditions are true. It adds to | |
677 | the message's headers, and/or writes information to the log. In each case, this | |
678 | only happens once (per message for headers, per connection for log). | |
679 | ||
680 | Arguments: | |
681 | where ACL_WHERE_xxxx indicating which ACL this is | |
682 | user_message message for adding to headers | |
683 | log_message message for logging, if different | |
684 | ||
685 | Returns: nothing | |
686 | */ | |
687 | ||
688 | static void | |
689 | acl_warn(int where, uschar *user_message, uschar *log_message) | |
690 | { | |
691 | int hlen; | |
692 | ||
693 | if (log_message != NULL && log_message != user_message) | |
694 | { | |
695 | uschar *text; | |
696 | string_item *logged; | |
697 | ||
698 | text = string_sprintf("%s Warning: %s", host_and_ident(TRUE), | |
699 | string_printing(log_message)); | |
700 | ||
701 | /* If a sender verification has failed, and the log message is "sender verify | |
702 | failed", add the failure message. */ | |
703 | ||
704 | if (sender_verified_failed != NULL && | |
705 | sender_verified_failed->message != NULL && | |
706 | strcmpic(log_message, US"sender verify failed") == 0) | |
707 | text = string_sprintf("%s: %s", text, sender_verified_failed->message); | |
708 | ||
709 | /* Search previously logged warnings. They are kept in malloc store so they | |
710 | can be freed at the start of a new message. */ | |
711 | ||
712 | for (logged = acl_warn_logged; logged != NULL; logged = logged->next) | |
713 | if (Ustrcmp(logged->text, text) == 0) break; | |
714 | ||
715 | if (logged == NULL) | |
716 | { | |
717 | int length = Ustrlen(text) + 1; | |
718 | log_write(0, LOG_MAIN, "%s", text); | |
719 | logged = store_malloc(sizeof(string_item) + length); | |
720 | logged->text = (uschar *)logged + sizeof(string_item); | |
721 | memcpy(logged->text, text, length); | |
722 | logged->next = acl_warn_logged; | |
723 | acl_warn_logged = logged; | |
724 | } | |
725 | } | |
726 | ||
727 | /* If there's no user message, we are done. */ | |
728 | ||
729 | if (user_message == NULL) return; | |
730 | ||
731 | /* If this isn't a message ACL, we can't do anything with a user message. | |
732 | Log an error. */ | |
733 | ||
734 | if (where > ACL_WHERE_NOTSMTP) | |
735 | { | |
736 | log_write(0, LOG_MAIN|LOG_PANIC, "ACL \"warn\" with \"message\" setting " | |
737 | "found in a non-message (%s) ACL: cannot specify header lines here: " | |
738 | "message ignored", acl_wherenames[where]); | |
739 | return; | |
740 | } | |
741 | ||
742 | /* Treat the user message as a sequence of one or more header lines. */ | |
743 | ||
744 | hlen = Ustrlen(user_message); | |
745 | if (hlen > 0) | |
746 | { | |
747 | uschar *text, *p, *q; | |
748 | ||
749 | /* Add a final newline if not present */ | |
750 | ||
751 | text = ((user_message)[hlen-1] == '\n')? user_message : | |
752 | string_sprintf("%s\n", user_message); | |
753 | ||
754 | /* Loop for multiple header lines, taking care about continuations */ | |
755 | ||
756 | for (p = q = text; *p != 0; ) | |
757 | { | |
758 | uschar *s; | |
759 | int newtype = htype_add_bot; | |
760 | header_line **hptr = &acl_warn_headers; | |
761 | ||
762 | /* Find next header line within the string */ | |
763 | ||
764 | for (;;) | |
765 | { | |
766 | q = Ustrchr(q, '\n'); | |
767 | if (*(++q) != ' ' && *q != '\t') break; | |
768 | } | |
769 | ||
770 | /* If the line starts with a colon, interpret the instruction for where to | |
771 | add it. This temporarily sets up a new type. */ | |
772 | ||
773 | if (*p == ':') | |
774 | { | |
775 | if (strncmpic(p, US":after_received:", 16) == 0) | |
776 | { | |
777 | newtype = htype_add_rec; | |
778 | p += 16; | |
779 | } | |
8523533c TK |
780 | else if (strncmpic(p, US":at_start_rfc:", 14) == 0) |
781 | { | |
782 | newtype = htype_add_rfc; | |
783 | p += 14; | |
784 | } | |
059ec3d9 PH |
785 | else if (strncmpic(p, US":at_start:", 10) == 0) |
786 | { | |
787 | newtype = htype_add_top; | |
788 | p += 10; | |
789 | } | |
790 | else if (strncmpic(p, US":at_end:", 8) == 0) | |
791 | { | |
792 | newtype = htype_add_bot; | |
793 | p += 8; | |
794 | } | |
795 | while (*p == ' ' || *p == '\t') p++; | |
796 | } | |
797 | ||
798 | /* See if this line starts with a header name, and if not, add X-ACL-Warn: | |
799 | to the front of it. */ | |
800 | ||
801 | for (s = p; s < q - 1; s++) | |
802 | { | |
803 | if (*s == ':' || !isgraph(*s)) break; | |
804 | } | |
805 | ||
806 | s = string_sprintf("%s%.*s", (*s == ':')? "" : "X-ACL-Warn: ", q - p, p); | |
807 | hlen = Ustrlen(s); | |
808 | ||
809 | /* See if this line has already been added */ | |
810 | ||
811 | while (*hptr != NULL) | |
812 | { | |
813 | if (Ustrncmp((*hptr)->text, s, hlen) == 0) break; | |
814 | hptr = &((*hptr)->next); | |
815 | } | |
816 | ||
817 | /* Add if not previously present */ | |
818 | ||
819 | if (*hptr == NULL) | |
820 | { | |
821 | header_line *h = store_get(sizeof(header_line)); | |
822 | h->text = s; | |
823 | h->next = NULL; | |
824 | h->type = newtype; | |
825 | h->slen = hlen; | |
826 | *hptr = h; | |
827 | hptr = &(h->next); | |
828 | } | |
829 | ||
830 | /* Advance for next header line within the string */ | |
831 | ||
832 | p = q; | |
833 | } | |
834 | } | |
835 | } | |
836 | ||
837 | ||
838 | ||
839 | /************************************************* | |
840 | * Verify and check reverse DNS * | |
841 | *************************************************/ | |
842 | ||
843 | /* Called from acl_verify() below. We look up the host name(s) of the client IP | |
844 | address if this has not yet been done. The host_name_lookup() function checks | |
845 | that one of these names resolves to an address list that contains the client IP | |
846 | address, so we don't actually have to do the check here. | |
847 | ||
848 | Arguments: | |
849 | user_msgptr pointer for user message | |
850 | log_msgptr pointer for log message | |
851 | ||
852 | Returns: OK verification condition succeeded | |
853 | FAIL verification failed | |
854 | DEFER there was a problem verifying | |
855 | */ | |
856 | ||
857 | static int | |
858 | acl_verify_reverse(uschar **user_msgptr, uschar **log_msgptr) | |
859 | { | |
860 | int rc; | |
861 | ||
862 | user_msgptr = user_msgptr; /* stop compiler warning */ | |
863 | ||
864 | /* Previous success */ | |
865 | ||
866 | if (sender_host_name != NULL) return OK; | |
867 | ||
868 | /* Previous failure */ | |
869 | ||
870 | if (host_lookup_failed) | |
871 | { | |
872 | *log_msgptr = string_sprintf("host lookup failed%s", host_lookup_msg); | |
873 | return FAIL; | |
874 | } | |
875 | ||
876 | /* Need to do a lookup */ | |
877 | ||
878 | HDEBUG(D_acl) | |
879 | debug_printf("looking up host name to force name/address consistency check\n"); | |
880 | ||
881 | if ((rc = host_name_lookup()) != OK) | |
882 | { | |
883 | *log_msgptr = (rc == DEFER)? | |
884 | US"host lookup deferred for reverse lookup check" | |
885 | : | |
886 | string_sprintf("host lookup failed for reverse lookup check%s", | |
887 | host_lookup_msg); | |
888 | return rc; /* DEFER or FAIL */ | |
889 | } | |
890 | ||
891 | host_build_sender_fullhost(); | |
892 | return OK; | |
893 | } | |
894 | ||
895 | ||
896 | ||
897 | /************************************************* | |
898 | * Handle verification (address & other) * | |
899 | *************************************************/ | |
900 | ||
901 | /* This function implements the "verify" condition. It is called when | |
902 | encountered in any ACL, because some tests are almost always permitted. Some | |
903 | just don't make sense, and always fail (for example, an attempt to test a host | |
904 | lookup for a non-TCP/IP message). Others are restricted to certain ACLs. | |
905 | ||
906 | Arguments: | |
907 | where where called from | |
908 | addr the recipient address that the ACL is handling, or NULL | |
909 | arg the argument of "verify" | |
910 | user_msgptr pointer for user message | |
911 | log_msgptr pointer for log message | |
912 | basic_errno where to put verify errno | |
913 | ||
914 | Returns: OK verification condition succeeded | |
915 | FAIL verification failed | |
916 | DEFER there was a problem verifying | |
917 | ERROR syntax error | |
918 | */ | |
919 | ||
920 | static int | |
921 | acl_verify(int where, address_item *addr, uschar *arg, | |
922 | uschar **user_msgptr, uschar **log_msgptr, int *basic_errno) | |
923 | { | |
924 | int sep = '/'; | |
925 | int callout = -1; | |
926 | int callout_overall = -1; | |
4deaf07d | 927 | int callout_connect = -1; |
059ec3d9 PH |
928 | int verify_options = 0; |
929 | int rc; | |
930 | BOOL verify_header_sender = FALSE; | |
931 | BOOL defer_ok = FALSE; | |
932 | BOOL callout_defer_ok = FALSE; | |
933 | BOOL no_details = FALSE; | |
934 | address_item *sender_vaddr = NULL; | |
935 | uschar *verify_sender_address = NULL; | |
936 | uschar *pm_mailfrom = NULL; | |
937 | uschar *se_mailfrom = NULL; | |
938 | uschar *list = arg; | |
939 | uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size); | |
940 | ||
941 | if (ss == NULL) goto BAD_VERIFY; | |
942 | ||
943 | /* Handle name/address consistency verification in a separate function. */ | |
944 | ||
945 | if (strcmpic(ss, US"reverse_host_lookup") == 0) | |
946 | { | |
947 | if (sender_host_address == NULL) return OK; | |
948 | return acl_verify_reverse(user_msgptr, log_msgptr); | |
949 | } | |
950 | ||
951 | /* TLS certificate verification is done at STARTTLS time; here we just | |
952 | test whether it was successful or not. (This is for optional verification; for | |
953 | mandatory verification, the connection doesn't last this long.) */ | |
954 | ||
955 | if (strcmpic(ss, US"certificate") == 0) | |
956 | { | |
957 | if (tls_certificate_verified) return OK; | |
958 | *user_msgptr = US"no verified certificate"; | |
959 | return FAIL; | |
960 | } | |
961 | ||
962 | /* We can test the result of optional HELO verification */ | |
963 | ||
964 | if (strcmpic(ss, US"helo") == 0) return helo_verified? OK : FAIL; | |
965 | ||
966 | /* Handle header verification options - permitted only after DATA or a non-SMTP | |
967 | message. */ | |
968 | ||
969 | if (strncmpic(ss, US"header_", 7) == 0) | |
970 | { | |
971 | if (where != ACL_WHERE_DATA && where != ACL_WHERE_NOTSMTP) | |
972 | { | |
973 | *log_msgptr = string_sprintf("cannot check header contents in ACL for %s " | |
974 | "(only possible in ACL for DATA)", acl_wherenames[where]); | |
975 | return ERROR; | |
976 | } | |
977 | ||
978 | /* Check that all relevant header lines have the correct syntax. If there is | |
979 | a syntax error, we return details of the error to the sender if configured to | |
980 | send out full details. (But a "message" setting on the ACL can override, as | |
981 | always). */ | |
982 | ||
983 | if (strcmpic(ss+7, US"syntax") == 0) | |
984 | { | |
985 | int rc = verify_check_headers(log_msgptr); | |
986 | if (rc != OK && smtp_return_error_details && *log_msgptr != NULL) | |
987 | *user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr); | |
988 | return rc; | |
989 | } | |
990 | ||
991 | /* Check that there is at least one verifiable sender address in the relevant | |
992 | header lines. This can be followed by callout and defer options, just like | |
993 | sender and recipient. */ | |
994 | ||
995 | else if (strcmpic(ss+7, US"sender") == 0) verify_header_sender = TRUE; | |
996 | ||
997 | /* Unknown verify argument starting with "header_" */ | |
998 | ||
999 | else goto BAD_VERIFY; | |
1000 | } | |
1001 | ||
1002 | /* Otherwise, first item in verify argument must be "sender" or "recipient". | |
1003 | In the case of a sender, this can optionally be followed by an address to use | |
1004 | in place of the actual sender (rare special-case requirement). */ | |
1005 | ||
1006 | else if (strncmpic(ss, US"sender", 6) == 0) | |
1007 | { | |
1008 | uschar *s = ss + 6; | |
1009 | if (where > ACL_WHERE_NOTSMTP) | |
1010 | { | |
1011 | *log_msgptr = string_sprintf("cannot verify sender in ACL for %s " | |
1012 | "(only possible for MAIL, RCPT, PREDATA, or DATA)", | |
1013 | acl_wherenames[where]); | |
1014 | return ERROR; | |
1015 | } | |
1016 | if (*s == 0) | |
1017 | verify_sender_address = sender_address; | |
1018 | else | |
1019 | { | |
1020 | while (isspace(*s)) s++; | |
1021 | if (*s++ != '=') goto BAD_VERIFY; | |
1022 | while (isspace(*s)) s++; | |
1023 | verify_sender_address = string_copy(s); | |
1024 | } | |
1025 | } | |
1026 | else | |
1027 | { | |
1028 | if (strcmpic(ss, US"recipient") != 0) goto BAD_VERIFY; | |
1029 | if (addr == NULL) | |
1030 | { | |
1031 | *log_msgptr = string_sprintf("cannot verify recipient in ACL for %s " | |
1032 | "(only possible for RCPT)", acl_wherenames[where]); | |
1033 | return ERROR; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | /* Remaining items are optional */ | |
1038 | ||
1039 | while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)) | |
1040 | != NULL) | |
1041 | { | |
1042 | if (strcmpic(ss, US"defer_ok") == 0) defer_ok = TRUE; | |
1043 | else if (strcmpic(ss, US"no_details") == 0) no_details = TRUE; | |
1044 | ||
1045 | /* These two old options are left for backwards compatibility */ | |
1046 | ||
1047 | else if (strcmpic(ss, US"callout_defer_ok") == 0) | |
1048 | { | |
1049 | callout_defer_ok = TRUE; | |
1050 | if (callout == -1) callout = CALLOUT_TIMEOUT_DEFAULT; | |
1051 | } | |
1052 | ||
1053 | else if (strcmpic(ss, US"check_postmaster") == 0) | |
1054 | { | |
1055 | pm_mailfrom = US""; | |
1056 | if (callout == -1) callout = CALLOUT_TIMEOUT_DEFAULT; | |
1057 | } | |
1058 | ||
1059 | /* The callout option has a number of sub-options, comma separated */ | |
1060 | ||
1061 | else if (strncmpic(ss, US"callout", 7) == 0) | |
1062 | { | |
1063 | callout = CALLOUT_TIMEOUT_DEFAULT; | |
1064 | ss += 7; | |
1065 | if (*ss != 0) | |
1066 | { | |
1067 | while (isspace(*ss)) ss++; | |
1068 | if (*ss++ == '=') | |
1069 | { | |
1070 | int optsep = ','; | |
1071 | uschar *opt; | |
1072 | uschar buffer[256]; | |
1073 | while (isspace(*ss)) ss++; | |
4deaf07d PH |
1074 | |
1075 | /* This callout option handling code has become a mess as new options | |
1076 | have been added in an ad hoc manner. It should be tidied up into some | |
1077 | kind of table-driven thing. */ | |
1078 | ||
059ec3d9 PH |
1079 | while ((opt = string_nextinlist(&ss, &optsep, buffer, sizeof(buffer))) |
1080 | != NULL) | |
1081 | { | |
1082 | if (strcmpic(opt, US"defer_ok") == 0) callout_defer_ok = TRUE; | |
1083 | else if (strcmpic(opt, US"no_cache") == 0) | |
1084 | verify_options |= vopt_callout_no_cache; | |
1085 | else if (strcmpic(opt, US"random") == 0) | |
1086 | verify_options |= vopt_callout_random; | |
1087 | else if (strcmpic(opt, US"use_sender") == 0) | |
1088 | verify_options |= vopt_callout_recipsender; | |
1089 | else if (strcmpic(opt, US"use_postmaster") == 0) | |
1090 | verify_options |= vopt_callout_recippmaster; | |
1091 | else if (strcmpic(opt, US"postmaster") == 0) pm_mailfrom = US""; | |
1092 | ||
1093 | else if (strncmpic(opt, US"mailfrom", 8) == 0) | |
1094 | { | |
1095 | if (!verify_header_sender) | |
1096 | { | |
1097 | *log_msgptr = string_sprintf("\"mailfrom\" is allowed as a " | |
1098 | "callout option only for verify=header_sender (detected in ACL " | |
1099 | "condition \"%s\")", arg); | |
1100 | return ERROR; | |
1101 | } | |
1102 | opt += 8; | |
1103 | while (isspace(*opt)) opt++; | |
1104 | if (*opt++ != '=') | |
1105 | { | |
1106 | *log_msgptr = string_sprintf("'=' expected after " | |
1107 | "\"mailfrom\" in ACL condition \"%s\"", arg); | |
1108 | return ERROR; | |
1109 | } | |
1110 | while (isspace(*opt)) opt++; | |
1111 | se_mailfrom = string_copy(opt); | |
1112 | } | |
1113 | ||
1114 | else if (strncmpic(opt, US"postmaster_mailfrom", 19) == 0) | |
1115 | { | |
1116 | opt += 19; | |
1117 | while (isspace(*opt)) opt++; | |
1118 | if (*opt++ != '=') | |
1119 | { | |
1120 | *log_msgptr = string_sprintf("'=' expected after " | |
1121 | "\"postmaster_mailfrom\" in ACL condition \"%s\"", arg); | |
1122 | return ERROR; | |
1123 | } | |
1124 | while (isspace(*opt)) opt++; | |
1125 | pm_mailfrom = string_copy(opt); | |
1126 | } | |
1127 | ||
1128 | else if (strncmpic(opt, US"maxwait", 7) == 0) | |
1129 | { | |
1130 | opt += 7; | |
1131 | while (isspace(*opt)) opt++; | |
1132 | if (*opt++ != '=') | |
1133 | { | |
1134 | *log_msgptr = string_sprintf("'=' expected after \"maxwait\" in " | |
1135 | "ACL condition \"%s\"", arg); | |
1136 | return ERROR; | |
1137 | } | |
1138 | while (isspace(*opt)) opt++; | |
1139 | callout_overall = readconf_readtime(opt, 0, FALSE); | |
1140 | if (callout_overall < 0) | |
1141 | { | |
1142 | *log_msgptr = string_sprintf("bad time value in ACL condition " | |
1143 | "\"verify %s\"", arg); | |
1144 | return ERROR; | |
1145 | } | |
1146 | } | |
4deaf07d PH |
1147 | else if (strncmpic(opt, US"connect", 7) == 0) |
1148 | { | |
1149 | opt += 7; | |
1150 | while (isspace(*opt)) opt++; | |
1151 | if (*opt++ != '=') | |
1152 | { | |
1153 | *log_msgptr = string_sprintf("'=' expected after " | |
1154 | "\"callout_overaall\" in ACL condition \"%s\"", arg); | |
1155 | return ERROR; | |
1156 | } | |
1157 | while (isspace(*opt)) opt++; | |
1158 | callout_connect = readconf_readtime(opt, 0, FALSE); | |
1159 | if (callout_connect < 0) | |
1160 | { | |
1161 | *log_msgptr = string_sprintf("bad time value in ACL condition " | |
1162 | "\"verify %s\"", arg); | |
1163 | return ERROR; | |
1164 | } | |
1165 | } | |
059ec3d9 PH |
1166 | else /* Plain time is callout connect/command timeout */ |
1167 | { | |
1168 | callout = readconf_readtime(opt, 0, FALSE); | |
1169 | if (callout < 0) | |
1170 | { | |
1171 | *log_msgptr = string_sprintf("bad time value in ACL condition " | |
1172 | "\"verify %s\"", arg); | |
1173 | return ERROR; | |
1174 | } | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | else | |
1179 | { | |
1180 | *log_msgptr = string_sprintf("'=' expected after \"callout\" in " | |
1181 | "ACL condition \"%s\"", arg); | |
1182 | return ERROR; | |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /* Option not recognized */ | |
1188 | ||
1189 | else | |
1190 | { | |
1191 | *log_msgptr = string_sprintf("unknown option \"%s\" in ACL " | |
1192 | "condition \"verify %s\"", ss, arg); | |
1193 | return ERROR; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | if ((verify_options & (vopt_callout_recipsender|vopt_callout_recippmaster)) == | |
1198 | (vopt_callout_recipsender|vopt_callout_recippmaster)) | |
1199 | { | |
1200 | *log_msgptr = US"only one of use_sender and use_postmaster can be set " | |
1201 | "for a recipient callout"; | |
1202 | return ERROR; | |
1203 | } | |
1204 | ||
1205 | /* Handle sender-in-header verification. Default the user message to the log | |
1206 | message if giving out verification details. */ | |
1207 | ||
1208 | if (verify_header_sender) | |
1209 | { | |
1210 | rc = verify_check_header_address(user_msgptr, log_msgptr, callout, | |
4deaf07d | 1211 | callout_overall, callout_connect, se_mailfrom, pm_mailfrom, verify_options); |
059ec3d9 PH |
1212 | if (smtp_return_error_details) |
1213 | { | |
1214 | if (*user_msgptr == NULL && *log_msgptr != NULL) | |
1215 | *user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr); | |
1216 | if (rc == DEFER) acl_temp_details = TRUE; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | /* Handle a sender address. The default is to verify *the* sender address, but | |
1221 | optionally a different address can be given, for special requirements. If the | |
1222 | address is empty, we are dealing with a bounce message that has no sender, so | |
1223 | we cannot do any checking. If the real sender address gets rewritten during | |
1224 | verification (e.g. DNS widening), set the flag to stop it being rewritten again | |
1225 | during message reception. | |
1226 | ||
1227 | A list of verified "sender" addresses is kept to try to avoid doing to much | |
1228 | work repetitively when there are multiple recipients in a message and they all | |
1229 | require sender verification. However, when callouts are involved, it gets too | |
1230 | complicated because different recipients may require different callout options. | |
1231 | Therefore, we always do a full sender verify when any kind of callout is | |
1232 | specified. Caching elsewhere, for instance in the DNS resolver and in the | |
1233 | callout handling, should ensure that this is not terribly inefficient. */ | |
1234 | ||
1235 | else if (verify_sender_address != NULL) | |
1236 | { | |
1237 | if ((verify_options & (vopt_callout_recipsender|vopt_callout_recippmaster)) | |
1238 | != 0) | |
1239 | { | |
1240 | *log_msgptr = US"use_sender or use_postmaster cannot be used for a " | |
1241 | "sender verify callout"; | |
1242 | return ERROR; | |
1243 | } | |
1244 | ||
1245 | sender_vaddr = verify_checked_sender(verify_sender_address); | |
1246 | if (sender_vaddr != NULL && /* Previously checked */ | |
1247 | callout <= 0) /* No callout needed this time */ | |
1248 | { | |
1249 | /* If the "routed" flag is set, it means that routing worked before, so | |
1250 | this check can give OK (the saved return code value, if set, belongs to a | |
1251 | callout that was done previously). If the "routed" flag is not set, routing | |
1252 | must have failed, so we use the saved return code. */ | |
1253 | ||
1254 | if (testflag(sender_vaddr, af_verify_routed)) rc = OK; else | |
1255 | { | |
1256 | rc = sender_vaddr->special_action; | |
1257 | *basic_errno = sender_vaddr->basic_errno; | |
1258 | } | |
1259 | HDEBUG(D_acl) debug_printf("using cached sender verify result\n"); | |
1260 | } | |
1261 | ||
1262 | /* Do a new verification, and cache the result. The cache is used to avoid | |
1263 | verifying the sender multiple times for multiple RCPTs when callouts are not | |
1264 | specified (see comments above). | |
1265 | ||
1266 | The cache is also used on failure to give details in response to the first | |
1267 | RCPT that gets bounced for this reason. However, this can be suppressed by | |
1268 | the no_details option, which sets the flag that says "this detail has already | |
1269 | been sent". The cache normally contains just one address, but there may be | |
1270 | more in esoteric circumstances. */ | |
1271 | ||
1272 | else | |
1273 | { | |
1274 | BOOL routed = TRUE; | |
2a3eea10 PH |
1275 | uschar *save_address_data = deliver_address_data; |
1276 | ||
059ec3d9 PH |
1277 | sender_vaddr = deliver_make_addr(verify_sender_address, TRUE); |
1278 | if (no_details) setflag(sender_vaddr, af_sverify_told); | |
1279 | if (verify_sender_address[0] != 0) | |
1280 | { | |
1281 | /* If this is the real sender address, save the unrewritten version | |
1282 | for use later in receive. Otherwise, set a flag so that rewriting the | |
1283 | sender in verify_address() does not update sender_address. */ | |
1284 | ||
1285 | if (verify_sender_address == sender_address) | |
1286 | sender_address_unrewritten = sender_address; | |
1287 | else | |
1288 | verify_options |= vopt_fake_sender; | |
1289 | ||
1290 | /* The recipient, qualify, and expn options are never set in | |
1291 | verify_options. */ | |
1292 | ||
1293 | rc = verify_address(sender_vaddr, NULL, verify_options, callout, | |
4deaf07d | 1294 | callout_overall, callout_connect, se_mailfrom, pm_mailfrom, &routed); |
059ec3d9 PH |
1295 | |
1296 | HDEBUG(D_acl) debug_printf("----------- end verify ------------\n"); | |
1297 | ||
1298 | if (rc == OK) | |
1299 | { | |
1300 | if (Ustrcmp(sender_vaddr->address, verify_sender_address) != 0) | |
1301 | { | |
1302 | DEBUG(D_acl) debug_printf("sender %s verified ok as %s\n", | |
1303 | verify_sender_address, sender_vaddr->address); | |
1304 | } | |
1305 | else | |
1306 | { | |
1307 | DEBUG(D_acl) debug_printf("sender %s verified ok\n", | |
1308 | verify_sender_address); | |
1309 | } | |
1310 | } | |
1311 | else *basic_errno = sender_vaddr->basic_errno; | |
1312 | } | |
1313 | else rc = OK; /* Null sender */ | |
1314 | ||
1315 | /* Cache the result code */ | |
1316 | ||
1317 | if (routed) setflag(sender_vaddr, af_verify_routed); | |
1318 | if (callout > 0) setflag(sender_vaddr, af_verify_callout); | |
1319 | sender_vaddr->special_action = rc; | |
1320 | sender_vaddr->next = sender_verified_list; | |
1321 | sender_verified_list = sender_vaddr; | |
2a3eea10 PH |
1322 | |
1323 | /* Restore the recipient address data, which might have been clobbered by | |
1324 | the sender verification. */ | |
1325 | ||
1326 | deliver_address_data = save_address_data; | |
059ec3d9 | 1327 | } |
2a3eea10 PH |
1328 | |
1329 | /* Put the sender address_data value into $sender_address_data */ | |
1330 | ||
1331 | sender_address_data = sender_vaddr->p.address_data; | |
059ec3d9 PH |
1332 | } |
1333 | ||
1334 | /* A recipient address just gets a straightforward verify; again we must handle | |
1335 | the DEFER overrides. */ | |
1336 | ||
1337 | else | |
1338 | { | |
1339 | address_item addr2; | |
1340 | ||
1341 | /* We must use a copy of the address for verification, because it might | |
1342 | get rewritten. */ | |
1343 | ||
1344 | addr2 = *addr; | |
1345 | rc = verify_address(&addr2, NULL, verify_options|vopt_is_recipient, callout, | |
4deaf07d | 1346 | callout_overall, callout_connect, se_mailfrom, pm_mailfrom, NULL); |
059ec3d9 PH |
1347 | HDEBUG(D_acl) debug_printf("----------- end verify ------------\n"); |
1348 | *log_msgptr = addr2.message; | |
1349 | *user_msgptr = addr2.user_message; | |
1350 | *basic_errno = addr2.basic_errno; | |
1351 | ||
1352 | /* Make $address_data visible */ | |
1353 | deliver_address_data = addr2.p.address_data; | |
1354 | } | |
1355 | ||
1356 | /* We have a result from the relevant test. Handle defer overrides first. */ | |
1357 | ||
1358 | if (rc == DEFER && (defer_ok || | |
1359 | (callout_defer_ok && *basic_errno == ERRNO_CALLOUTDEFER))) | |
1360 | { | |
1361 | HDEBUG(D_acl) debug_printf("verify defer overridden by %s\n", | |
1362 | defer_ok? "defer_ok" : "callout_defer_ok"); | |
1363 | rc = OK; | |
1364 | } | |
1365 | ||
1366 | /* If we've failed a sender, set up a recipient message, and point | |
1367 | sender_verified_failed to the address item that actually failed. */ | |
1368 | ||
1369 | if (rc != OK && verify_sender_address != NULL) | |
1370 | { | |
1371 | if (rc != DEFER) | |
1372 | { | |
1373 | *log_msgptr = *user_msgptr = US"Sender verify failed"; | |
1374 | } | |
1375 | else if (*basic_errno != ERRNO_CALLOUTDEFER) | |
1376 | { | |
1377 | *log_msgptr = *user_msgptr = US"Could not complete sender verify"; | |
1378 | } | |
1379 | else | |
1380 | { | |
1381 | *log_msgptr = US"Could not complete sender verify callout"; | |
1382 | *user_msgptr = smtp_return_error_details? sender_vaddr->user_message : | |
1383 | *log_msgptr; | |
1384 | } | |
1385 | ||
1386 | sender_verified_failed = sender_vaddr; | |
1387 | } | |
1388 | ||
1389 | /* Verifying an address messes up the values of $domain and $local_part, | |
1390 | so reset them before returning if this is a RCPT ACL. */ | |
1391 | ||
1392 | if (addr != NULL) | |
1393 | { | |
1394 | deliver_domain = addr->domain; | |
1395 | deliver_localpart = addr->local_part; | |
1396 | } | |
1397 | return rc; | |
1398 | ||
1399 | /* Syntax errors in the verify argument come here. */ | |
1400 | ||
1401 | BAD_VERIFY: | |
1402 | *log_msgptr = string_sprintf("expected \"sender[=address]\", \"recipient\", " | |
1403 | "\"header_syntax\" or \"header_sender\" at start of ACL condition " | |
1404 | "\"verify %s\"", arg); | |
1405 | return ERROR; | |
1406 | } | |
1407 | ||
1408 | ||
1409 | ||
1410 | ||
1411 | /************************************************* | |
1412 | * Check argument for control= modifier * | |
1413 | *************************************************/ | |
1414 | ||
1415 | /* Called from acl_check_condition() below | |
1416 | ||
1417 | Arguments: | |
1418 | arg the argument string for control= | |
1419 | pptr set to point to the terminating character | |
1420 | where which ACL we are in | |
1421 | log_msgptr for error messages | |
1422 | ||
1423 | Returns: CONTROL_xxx value | |
1424 | */ | |
1425 | ||
1426 | static int | |
1427 | decode_control(uschar *arg, uschar **pptr, int where, uschar **log_msgptr) | |
1428 | { | |
1429 | int len; | |
1430 | control_def *d; | |
1431 | ||
1432 | for (d = controls_list; | |
1433 | d < controls_list + sizeof(controls_list)/sizeof(control_def); | |
1434 | d++) | |
1435 | { | |
1436 | len = Ustrlen(d->name); | |
1437 | if (Ustrncmp(d->name, arg, len) == 0) break; | |
1438 | } | |
1439 | ||
1440 | if (d >= controls_list + sizeof(controls_list)/sizeof(control_def) || | |
1441 | (arg[len] != 0 && (!d->has_option || arg[len] != '/'))) | |
1442 | { | |
1443 | *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); | |
1444 | return CONTROL_ERROR; | |
1445 | } | |
1446 | ||
059ec3d9 PH |
1447 | *pptr = arg + len; |
1448 | return d->value; | |
1449 | } | |
1450 | ||
1451 | ||
1452 | ||
1453 | /************************************************* | |
1454 | * Handle conditions/modifiers on an ACL item * | |
1455 | *************************************************/ | |
1456 | ||
1457 | /* Called from acl_check() below. | |
1458 | ||
1459 | Arguments: | |
1460 | verb ACL verb | |
1461 | cb ACL condition block - if NULL, result is OK | |
1462 | where where called from | |
1463 | addr the address being checked for RCPT, or NULL | |
1464 | level the nesting level | |
1465 | epp pointer to pass back TRUE if "endpass" encountered | |
1466 | (applies only to "accept" and "discard") | |
1467 | user_msgptr user message pointer | |
1468 | log_msgptr log message pointer | |
1469 | basic_errno pointer to where to put verify error | |
1470 | ||
1471 | Returns: OK - all conditions are met | |
1472 | DISCARD - an "acl" condition returned DISCARD - only allowed | |
1473 | for "accept" or "discard" verbs | |
1474 | FAIL - at least one condition fails | |
1475 | FAIL_DROP - an "acl" condition returned FAIL_DROP | |
1476 | DEFER - can't tell at the moment (typically, lookup defer, | |
1477 | but can be temporary callout problem) | |
1478 | ERROR - ERROR from nested ACL or expansion failure or other | |
1479 | error | |
1480 | */ | |
1481 | ||
1482 | static int | |
1483 | acl_check_condition(int verb, acl_condition_block *cb, int where, | |
1484 | address_item *addr, int level, BOOL *epp, uschar **user_msgptr, | |
1485 | uschar **log_msgptr, int *basic_errno) | |
1486 | { | |
1487 | uschar *user_message = NULL; | |
1488 | uschar *log_message = NULL; | |
1489 | uschar *p; | |
1490 | int rc = OK; | |
8523533c TK |
1491 | #ifdef WITH_CONTENT_SCAN |
1492 | int sep = '/'; | |
1493 | #endif | |
059ec3d9 PH |
1494 | |
1495 | for (; cb != NULL; cb = cb->next) | |
1496 | { | |
1497 | uschar *arg; | |
c5fcb476 | 1498 | int control_type; |
059ec3d9 PH |
1499 | |
1500 | /* The message and log_message items set up messages to be used in | |
1501 | case of rejection. They are expanded later. */ | |
1502 | ||
1503 | if (cb->type == ACLC_MESSAGE) | |
1504 | { | |
1505 | user_message = cb->arg; | |
1506 | continue; | |
1507 | } | |
1508 | ||
1509 | if (cb->type == ACLC_LOG_MESSAGE) | |
1510 | { | |
1511 | log_message = cb->arg; | |
1512 | continue; | |
1513 | } | |
1514 | ||
1515 | /* The endpass "condition" just sets a flag to show it occurred. This is | |
1516 | checked at compile time to be on an "accept" or "discard" item. */ | |
1517 | ||
1518 | if (cb->type == ACLC_ENDPASS) | |
1519 | { | |
1520 | *epp = TRUE; | |
1521 | continue; | |
1522 | } | |
1523 | ||
1524 | /* For other conditions and modifiers, the argument is expanded now for some | |
1525 | of them, but not for all, because expansion happens down in some lower level | |
1526 | checking functions in some cases. */ | |
1527 | ||
1528 | if (cond_expand_at_top[cb->type]) | |
1529 | { | |
1530 | arg = expand_string(cb->arg); | |
1531 | if (arg == NULL) | |
1532 | { | |
1533 | if (expand_string_forcedfail) continue; | |
1534 | *log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", | |
1535 | cb->arg, expand_string_message); | |
1536 | return search_find_defer? DEFER : ERROR; | |
1537 | } | |
1538 | } | |
1539 | else arg = cb->arg; | |
1540 | ||
1541 | /* Show condition, and expanded condition if it's different */ | |
1542 | ||
1543 | HDEBUG(D_acl) | |
1544 | { | |
1545 | int lhswidth = 0; | |
1546 | debug_printf("check %s%s %n", | |
1547 | (!cond_modifiers[cb->type] && cb->u.negated)? "!":"", | |
1548 | conditions[cb->type], &lhswidth); | |
1549 | ||
1550 | if (cb->type == ACLC_SET) | |
1551 | { | |
1552 | int n = cb->u.varnumber; | |
1553 | int t = (n < ACL_C_MAX)? 'c' : 'm'; | |
1554 | if (n >= ACL_C_MAX) n -= ACL_C_MAX; | |
1555 | debug_printf("acl_%c%d ", t, n); | |
1556 | lhswidth += 7; | |
1557 | } | |
1558 | ||
1559 | debug_printf("= %s\n", cb->arg); | |
1560 | ||
1561 | if (arg != cb->arg) | |
1562 | debug_printf("%.*s= %s\n", lhswidth, | |
1563 | US" ", CS arg); | |
1564 | } | |
1565 | ||
1566 | /* Check that this condition makes sense at this time */ | |
1567 | ||
1568 | if ((cond_forbids[cb->type] & (1 << where)) != 0) | |
1569 | { | |
1570 | *log_msgptr = string_sprintf("cannot %s %s condition in %s ACL", | |
1571 | cond_modifiers[cb->type]? "use" : "test", | |
1572 | conditions[cb->type], acl_wherenames[where]); | |
1573 | return ERROR; | |
1574 | } | |
1575 | ||
1576 | /* Run the appropriate test for each condition, or take the appropriate | |
1577 | action for the remaining modifiers. */ | |
1578 | ||
1579 | switch(cb->type) | |
1580 | { | |
1581 | /* A nested ACL that returns "discard" makes sense only for an "accept" or | |
1582 | "discard" verb. */ | |
1583 | ||
1584 | case ACLC_ACL: | |
1585 | rc = acl_check_internal(where, addr, arg, level+1, user_msgptr, log_msgptr); | |
1586 | if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD) | |
1587 | { | |
1588 | *log_msgptr = string_sprintf("nested ACL returned \"discard\" for " | |
1589 | "\"%s\" command (only allowed with \"accept\" or \"discard\")", | |
1590 | verbs[verb]); | |
1591 | return ERROR; | |
1592 | } | |
1593 | break; | |
1594 | ||
1595 | case ACLC_AUTHENTICATED: | |
1596 | rc = (sender_host_authenticated == NULL)? FAIL : | |
1597 | match_isinlist(sender_host_authenticated, &arg, 0, NULL, NULL, MCL_STRING, | |
1598 | TRUE, NULL); | |
1599 | break; | |
1600 | ||
8523533c TK |
1601 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
1602 | case ACLC_BMI_OPTIN: | |
1603 | { | |
1604 | int old_pool = store_pool; | |
1605 | store_pool = POOL_PERM; | |
1606 | bmi_current_optin = string_copy(arg); | |
1607 | store_pool = old_pool; | |
1608 | } | |
1609 | break; | |
1610 | #endif | |
1611 | ||
059ec3d9 PH |
1612 | case ACLC_CONDITION: |
1613 | if (Ustrspn(arg, "0123456789") == Ustrlen(arg)) /* Digits, or empty */ | |
1614 | rc = (Uatoi(arg) == 0)? FAIL : OK; | |
1615 | else | |
1616 | rc = (strcmpic(arg, US"no") == 0 || | |
1617 | strcmpic(arg, US"false") == 0)? FAIL : | |
1618 | (strcmpic(arg, US"yes") == 0 || | |
1619 | strcmpic(arg, US"true") == 0)? OK : DEFER; | |
1620 | if (rc == DEFER) | |
1621 | *log_msgptr = string_sprintf("invalid \"condition\" value \"%s\"", arg); | |
1622 | break; | |
1623 | ||
1624 | case ACLC_CONTROL: | |
c5fcb476 PH |
1625 | control_type = decode_control(arg, &p, where, log_msgptr); |
1626 | ||
8523533c | 1627 | /* Check if this control makes sense at this time */ |
c5fcb476 PH |
1628 | |
1629 | if ((control_forbids[control_type] & (1 << where)) != 0) | |
1630 | { | |
1631 | *log_msgptr = string_sprintf("cannot use \"control=%s\" in %s ACL", | |
1632 | controls[control_type], acl_wherenames[where]); | |
1633 | return ERROR; | |
1634 | } | |
1635 | ||
1636 | switch(control_type) | |
059ec3d9 | 1637 | { |
8523533c TK |
1638 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
1639 | case CONTROL_BMI_RUN: | |
1640 | bmi_run = 1; | |
1641 | break; | |
1642 | #endif | |
1643 | ||
059ec3d9 PH |
1644 | case CONTROL_ERROR: |
1645 | return ERROR; | |
1646 | ||
1647 | case CONTROL_CASEFUL_LOCAL_PART: | |
1648 | deliver_localpart = addr->cc_local_part; | |
1649 | break; | |
1650 | ||
1651 | case CONTROL_CASELOWER_LOCAL_PART: | |
1652 | deliver_localpart = addr->lc_local_part; | |
1653 | break; | |
1654 | ||
1655 | case CONTROL_ENFORCE_SYNC: | |
1656 | smtp_enforce_sync = TRUE; | |
1657 | break; | |
1658 | ||
1659 | case CONTROL_NO_ENFORCE_SYNC: | |
1660 | smtp_enforce_sync = FALSE; | |
1661 | break; | |
1662 | ||
8523533c TK |
1663 | #ifdef WITH_CONTENT_SCAN |
1664 | case CONTROL_NO_MBOX_UNSPOOL: | |
1665 | no_mbox_unspool = TRUE; | |
1666 | break; | |
1667 | #endif | |
1668 | ||
059ec3d9 PH |
1669 | case CONTROL_NO_MULTILINE: |
1670 | no_multiline_responses = TRUE; | |
1671 | break; | |
1672 | ||
8523533c TK |
1673 | case CONTROL_FAKEREJECT: |
1674 | fake_reject = TRUE; | |
1675 | if (*p == '/') | |
1676 | { | |
1677 | uschar *pp = p + 1; | |
1678 | while (*pp != 0) pp++; | |
1679 | fake_reject_text = expand_string(string_copyn(p+1, pp-p)); | |
1680 | p = pp; | |
1681 | } | |
1682 | else | |
1683 | { | |
1684 | /* Explicitly reset to default string */ | |
dc082449 | 1685 | fake_reject_text = US"Your message has been rejected but is being kept for evaluation.\nIf it was a legitimate message, it may still be delivered to the target recipient(s)."; |
8523533c TK |
1686 | } |
1687 | break; | |
8523533c | 1688 | |
059ec3d9 PH |
1689 | case CONTROL_FREEZE: |
1690 | deliver_freeze = TRUE; | |
1691 | deliver_frozen_at = time(NULL); | |
1692 | break; | |
1693 | ||
1694 | case CONTROL_QUEUE_ONLY: | |
1695 | queue_only_policy = TRUE; | |
1696 | break; | |
1697 | ||
1698 | case CONTROL_SUBMISSION: | |
1699 | submission_mode = TRUE; | |
69358f02 PH |
1700 | while (*p == '/') |
1701 | { | |
1702 | if (Ustrncmp(p, "/sender_retain", 14) == 0) | |
1703 | { | |
1704 | p += 14; | |
1705 | active_local_sender_retain = TRUE; | |
1706 | active_local_from_check = FALSE; | |
1707 | } | |
1708 | else if (Ustrncmp(p, "/domain=", 8) == 0) | |
1709 | { | |
1710 | uschar *pp = p + 8; | |
1711 | while (*pp != 0 && *pp != '/') pp++; | |
1712 | submission_domain = string_copyn(p+8, pp-p); | |
1713 | p = pp; | |
1714 | } | |
1715 | else break; | |
1716 | } | |
1717 | if (*p != 0) | |
059ec3d9 | 1718 | { |
69358f02 | 1719 | *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); |
059ec3d9 PH |
1720 | return ERROR; |
1721 | } | |
1722 | break; | |
1723 | } | |
1724 | break; | |
1725 | ||
8523533c TK |
1726 | #ifdef WITH_CONTENT_SCAN |
1727 | case ACLC_DECODE: | |
1728 | rc = mime_decode(&arg); | |
1729 | break; | |
1730 | #endif | |
1731 | ||
059ec3d9 PH |
1732 | case ACLC_DELAY: |
1733 | { | |
1734 | int delay = readconf_readtime(arg, 0, FALSE); | |
1735 | if (delay < 0) | |
1736 | { | |
1737 | *log_msgptr = string_sprintf("syntax error in argument for \"delay\" " | |
1738 | "modifier: \"%s\" is not a time value", arg); | |
1739 | return ERROR; | |
1740 | } | |
1741 | else | |
1742 | { | |
1743 | HDEBUG(D_acl) debug_printf("delay modifier requests %d-second delay\n", | |
1744 | delay); | |
1745 | if (host_checking) | |
1746 | { | |
1747 | HDEBUG(D_acl) | |
1748 | debug_printf("delay skipped in -bh checking mode\n"); | |
1749 | } | |
86b8287f PH |
1750 | else |
1751 | { | |
1752 | while (delay > 0) delay = sleep(delay); | |
1753 | } | |
059ec3d9 PH |
1754 | } |
1755 | } | |
1756 | break; | |
1757 | ||
8523533c TK |
1758 | #ifdef WITH_OLD_DEMIME |
1759 | case ACLC_DEMIME: | |
1760 | rc = demime(&arg); | |
1761 | break; | |
1762 | #endif | |
1763 | ||
059ec3d9 PH |
1764 | case ACLC_DNSLISTS: |
1765 | rc = verify_check_dnsbl(&arg); | |
1766 | break; | |
1767 | ||
1768 | case ACLC_DOMAINS: | |
1769 | rc = match_isinlist(addr->domain, &arg, 0, &domainlist_anchor, | |
1770 | addr->domain_cache, MCL_DOMAIN, TRUE, &deliver_domain_data); | |
1771 | break; | |
1772 | ||
1773 | /* The value in tls_cipher is the full cipher name, for example, | |
1774 | TLSv1:DES-CBC3-SHA:168, whereas the values to test for are just the | |
1775 | cipher names such as DES-CBC3-SHA. But program defensively. We don't know | |
1776 | what may in practice come out of the SSL library - which at the time of | |
1777 | writing is poorly documented. */ | |
1778 | ||
1779 | case ACLC_ENCRYPTED: | |
1780 | if (tls_cipher == NULL) rc = FAIL; else | |
1781 | { | |
1782 | uschar *endcipher = NULL; | |
1783 | uschar *cipher = Ustrchr(tls_cipher, ':'); | |
1784 | if (cipher == NULL) cipher = tls_cipher; else | |
1785 | { | |
1786 | endcipher = Ustrchr(++cipher, ':'); | |
1787 | if (endcipher != NULL) *endcipher = 0; | |
1788 | } | |
1789 | rc = match_isinlist(cipher, &arg, 0, NULL, NULL, MCL_STRING, TRUE, NULL); | |
1790 | if (endcipher != NULL) *endcipher = ':'; | |
1791 | } | |
1792 | break; | |
1793 | ||
1794 | /* Use verify_check_this_host() instead of verify_check_host() so that | |
1795 | we can pass over &host_data to catch any looked up data. Once it has been | |
1796 | set, it retains its value so that it's still there if another ACL verb | |
1797 | comes through here and uses the cache. However, we must put it into | |
1798 | permanent store in case it is also expected to be used in a subsequent | |
1799 | message in the same SMTP connection. */ | |
1800 | ||
1801 | case ACLC_HOSTS: | |
1802 | rc = verify_check_this_host(&arg, sender_host_cache, NULL, | |
1803 | (sender_host_address == NULL)? US"" : sender_host_address, &host_data); | |
1804 | if (host_data != NULL) host_data = string_copy_malloc(host_data); | |
1805 | break; | |
1806 | ||
1807 | case ACLC_LOCAL_PARTS: | |
1808 | rc = match_isinlist(addr->cc_local_part, &arg, 0, | |
1809 | &localpartlist_anchor, addr->localpart_cache, MCL_LOCALPART, TRUE, | |
1810 | &deliver_localpart_data); | |
1811 | break; | |
1812 | ||
1813 | case ACLC_LOGWRITE: | |
1814 | { | |
1815 | int logbits = 0; | |
1816 | uschar *s = arg; | |
1817 | if (*s == ':') | |
1818 | { | |
1819 | s++; | |
1820 | while (*s != ':') | |
1821 | { | |
1822 | if (Ustrncmp(s, "main", 4) == 0) | |
1823 | { logbits |= LOG_MAIN; s += 4; } | |
1824 | else if (Ustrncmp(s, "panic", 5) == 0) | |
1825 | { logbits |= LOG_PANIC; s += 5; } | |
1826 | else if (Ustrncmp(s, "reject", 6) == 0) | |
1827 | { logbits |= LOG_REJECT; s += 6; } | |
1828 | else | |
1829 | { | |
1830 | logbits = LOG_MAIN|LOG_PANIC; | |
1831 | s = string_sprintf(":unknown log name in \"%s\" in " | |
1832 | "\"logwrite\" in %s ACL", arg, acl_wherenames[where]); | |
1833 | } | |
1834 | if (*s == ',') s++; | |
1835 | } | |
1836 | s++; | |
1837 | } | |
1838 | while (isspace(*s)) s++; | |
1839 | if (logbits == 0) logbits = LOG_MAIN; | |
1840 | log_write(0, logbits, "%s", string_printing(s)); | |
1841 | } | |
1842 | break; | |
8523533c TK |
1843 | |
1844 | #ifdef WITH_CONTENT_SCAN | |
1845 | case ACLC_MALWARE: | |
1846 | { | |
1847 | /* Seperate the regular expression and any optional parameters. */ | |
1848 | uschar *ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size); | |
1849 | /* Run the malware backend. */ | |
1850 | rc = malware(&ss); | |
1851 | /* Modify return code based upon the existance of options. */ | |
1852 | while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) | |
1853 | != NULL) { | |
1854 | if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER) | |
1855 | { | |
1856 | /* FAIL so that the message is passed to the next ACL */ | |
1857 | rc = FAIL; | |
1858 | } | |
1859 | } | |
1860 | } | |
1861 | break; | |
1862 | ||
1863 | case ACLC_MIME_REGEX: | |
1864 | rc = mime_regex(&arg); | |
1865 | break; | |
1866 | #endif | |
059ec3d9 PH |
1867 | |
1868 | case ACLC_RECIPIENTS: | |
1869 | rc = match_address_list(addr->address, TRUE, TRUE, &arg, NULL, -1, 0, | |
1870 | &recipient_data); | |
1871 | break; | |
1872 | ||
8523533c TK |
1873 | #ifdef WITH_CONTENT_SCAN |
1874 | case ACLC_REGEX: | |
1875 | rc = regex(&arg); | |
1876 | break; | |
1877 | #endif | |
1878 | ||
059ec3d9 PH |
1879 | case ACLC_SENDER_DOMAINS: |
1880 | { | |
1881 | uschar *sdomain; | |
1882 | sdomain = Ustrrchr(sender_address, '@'); | |
1883 | sdomain = (sdomain == NULL)? US"" : sdomain + 1; | |
1884 | rc = match_isinlist(sdomain, &arg, 0, &domainlist_anchor, | |
1885 | sender_domain_cache, MCL_DOMAIN, TRUE, NULL); | |
1886 | } | |
1887 | break; | |
1888 | ||
1889 | case ACLC_SENDERS: | |
1890 | rc = match_address_list(sender_address, TRUE, TRUE, &arg, | |
1891 | sender_address_cache, -1, 0, &sender_data); | |
1892 | break; | |
1893 | ||
1894 | /* Connection variables must persist forever */ | |
1895 | ||
1896 | case ACLC_SET: | |
1897 | { | |
1898 | int old_pool = store_pool; | |
1899 | if (cb->u.varnumber < ACL_C_MAX) store_pool = POOL_PERM; | |
1900 | acl_var[cb->u.varnumber] = string_copy(arg); | |
1901 | store_pool = old_pool; | |
1902 | } | |
1903 | break; | |
1904 | ||
8523533c TK |
1905 | #ifdef WITH_CONTENT_SCAN |
1906 | case ACLC_SPAM: | |
1907 | { | |
1908 | /* Seperate the regular expression and any optional parameters. */ | |
1909 | uschar *ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size); | |
1910 | /* Run the spam backend. */ | |
1911 | rc = spam(&ss); | |
1912 | /* Modify return code based upon the existance of options. */ | |
1913 | while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) | |
1914 | != NULL) { | |
1915 | if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER) | |
1916 | { | |
1917 | /* FAIL so that the message is passed to the next ACL */ | |
1918 | rc = FAIL; | |
1919 | } | |
1920 | } | |
1921 | } | |
1922 | break; | |
1923 | #endif | |
1924 | ||
1925 | #ifdef EXPERIMENTAL_SPF | |
1926 | case ACLC_SPF: | |
1927 | rc = spf_process(&arg, sender_address); | |
1928 | break; | |
1929 | #endif | |
1930 | ||
059ec3d9 PH |
1931 | /* If the verb is WARN, discard any user message from verification, because |
1932 | such messages are SMTP responses, not header additions. The latter come | |
1933 | only from explicit "message" modifiers. */ | |
1934 | ||
1935 | case ACLC_VERIFY: | |
1936 | rc = acl_verify(where, addr, arg, user_msgptr, log_msgptr, basic_errno); | |
1937 | if (verb == ACL_WARN) *user_msgptr = NULL; | |
1938 | break; | |
1939 | ||
1940 | default: | |
1941 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "internal ACL error: unknown " | |
1942 | "condition %d", cb->type); | |
1943 | break; | |
1944 | } | |
1945 | ||
1946 | /* If a condition was negated, invert OK/FAIL. */ | |
1947 | ||
1948 | if (!cond_modifiers[cb->type] && cb->u.negated) | |
1949 | { | |
1950 | if (rc == OK) rc = FAIL; | |
1951 | else if (rc == FAIL || rc == FAIL_DROP) rc = OK; | |
1952 | } | |
1953 | ||
1954 | if (rc != OK) break; /* Conditions loop */ | |
1955 | } | |
1956 | ||
1957 | ||
1958 | /* If the result is the one for which "message" and/or "log_message" are used, | |
1959 | handle the values of these options. Most verbs have but a single return for | |
1960 | which the messages are relevant, but for "discard", it's useful to have the log | |
1961 | message both when it succeeds and when it fails. Also, for an "accept" that | |
1962 | appears in a QUIT ACL, we want to handle the user message. Since only "accept" | |
1963 | and "warn" are permitted in that ACL, we don't need to test the verb. | |
1964 | ||
1965 | These modifiers act in different ways: | |
1966 | ||
1967 | "message" is a user message that will be included in an SMTP response. Unless | |
1968 | it is empty, it overrides any previously set user message. | |
1969 | ||
1970 | "log_message" is a non-user message, and it adds to any existing non-user | |
1971 | message that is already set. | |
1972 | ||
1973 | If there isn't a log message set, we make it the same as the user message. */ | |
1974 | ||
1975 | if (((rc == FAIL_DROP)? FAIL : rc) == msgcond[verb] || | |
1976 | (verb == ACL_DISCARD && rc == OK) || | |
1977 | (where == ACL_WHERE_QUIT)) | |
1978 | { | |
1979 | uschar *expmessage; | |
1980 | ||
1981 | /* If the verb is "warn", messages generated by conditions (verification or | |
1982 | nested ACLs) are discarded. Only messages specified at this level are used. | |
1983 | However, the value of an existing message is available in $acl_verify_message | |
1984 | during expansions. */ | |
1985 | ||
1986 | uschar *old_user_msgptr = *user_msgptr; | |
1987 | uschar *old_log_msgptr = (*log_msgptr != NULL)? *log_msgptr : old_user_msgptr; | |
1988 | ||
1989 | if (verb == ACL_WARN) *log_msgptr = *user_msgptr = NULL; | |
1990 | ||
1991 | if (user_message != NULL) | |
1992 | { | |
1993 | acl_verify_message = old_user_msgptr; | |
1994 | expmessage = expand_string(user_message); | |
1995 | if (expmessage == NULL) | |
1996 | { | |
1997 | if (!expand_string_forcedfail) | |
1998 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand ACL message \"%s\": %s", | |
1999 | user_message, expand_string_message); | |
2000 | } | |
2001 | else if (expmessage[0] != 0) *user_msgptr = expmessage; | |
2002 | } | |
2003 | ||
2004 | if (log_message != NULL) | |
2005 | { | |
2006 | acl_verify_message = old_log_msgptr; | |
2007 | expmessage = expand_string(log_message); | |
2008 | if (expmessage == NULL) | |
2009 | { | |
2010 | if (!expand_string_forcedfail) | |
2011 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand ACL message \"%s\": %s", | |
2012 | log_message, expand_string_message); | |
2013 | } | |
2014 | else if (expmessage[0] != 0) | |
2015 | { | |
2016 | *log_msgptr = (*log_msgptr == NULL)? expmessage : | |
2017 | string_sprintf("%s: %s", expmessage, *log_msgptr); | |
2018 | } | |
2019 | } | |
2020 | ||
2021 | /* If no log message, default it to the user message */ | |
2022 | ||
2023 | if (*log_msgptr == NULL) *log_msgptr = *user_msgptr; | |
2024 | } | |
2025 | ||
2026 | acl_verify_message = NULL; | |
2027 | return rc; | |
2028 | } | |
2029 | ||
2030 | ||
2031 | ||
2032 | ||
2033 | ||
2034 | /************************************************* | |
2035 | * Get line from a literal ACL * | |
2036 | *************************************************/ | |
2037 | ||
2038 | /* This function is passed to acl_read() in order to extract individual lines | |
2039 | of a literal ACL, which we access via static pointers. We can destroy the | |
2040 | contents because this is called only once (the compiled ACL is remembered). | |
2041 | ||
2042 | This code is intended to treat the data in the same way as lines in the main | |
2043 | Exim configuration file. That is: | |
2044 | ||
2045 | . Leading spaces are ignored. | |
2046 | ||
2047 | . A \ at the end of a line is a continuation - trailing spaces after the \ | |
2048 | are permitted (this is because I don't believe in making invisible things | |
2049 | significant). Leading spaces on the continued part of a line are ignored. | |
2050 | ||
2051 | . Physical lines starting (significantly) with # are totally ignored, and | |
2052 | may appear within a sequence of backslash-continued lines. | |
2053 | ||
2054 | . Blank lines are ignored, but will end a sequence of continuations. | |
2055 | ||
2056 | Arguments: none | |
2057 | Returns: a pointer to the next line | |
2058 | */ | |
2059 | ||
2060 | ||
2061 | static uschar *acl_text; /* Current pointer in the text */ | |
2062 | static uschar *acl_text_end; /* Points one past the terminating '0' */ | |
2063 | ||
2064 | ||
2065 | static uschar * | |
2066 | acl_getline(void) | |
2067 | { | |
2068 | uschar *yield; | |
2069 | ||
2070 | /* This loop handles leading blank lines and comments. */ | |
2071 | ||
2072 | for(;;) | |
2073 | { | |
2074 | while (isspace(*acl_text)) acl_text++; /* Leading spaces/empty lines */ | |
2075 | if (*acl_text == 0) return NULL; /* No more data */ | |
2076 | yield = acl_text; /* Potential data line */ | |
2077 | ||
2078 | while (*acl_text != 0 && *acl_text != '\n') acl_text++; | |
2079 | ||
2080 | /* If we hit the end before a newline, we have the whole logical line. If | |
2081 | it's a comment, there's no more data to be given. Otherwise, yield it. */ | |
2082 | ||
2083 | if (*acl_text == 0) return (*yield == '#')? NULL : yield; | |
2084 | ||
2085 | /* After reaching a newline, end this loop if the physical line does not | |
2086 | start with '#'. If it does, it's a comment, and the loop continues. */ | |
2087 | ||
2088 | if (*yield != '#') break; | |
2089 | } | |
2090 | ||
2091 | /* This loop handles continuations. We know we have some real data, ending in | |
2092 | newline. See if there is a continuation marker at the end (ignoring trailing | |
2093 | white space). We know that *yield is not white space, so no need to test for | |
2094 | cont > yield in the backwards scanning loop. */ | |
2095 | ||
2096 | for(;;) | |
2097 | { | |
2098 | uschar *cont; | |
2099 | for (cont = acl_text - 1; isspace(*cont); cont--); | |
2100 | ||
2101 | /* If no continuation follows, we are done. Mark the end of the line and | |
2102 | return it. */ | |
2103 | ||
2104 | if (*cont != '\\') | |
2105 | { | |
2106 | *acl_text++ = 0; | |
2107 | return yield; | |
2108 | } | |
2109 | ||
2110 | /* We have encountered a continuation. Skip over whitespace at the start of | |
2111 | the next line, and indeed the whole of the next line or lines if they are | |
2112 | comment lines. */ | |
2113 | ||
2114 | for (;;) | |
2115 | { | |
2116 | while (*(++acl_text) == ' ' || *acl_text == '\t'); | |
2117 | if (*acl_text != '#') break; | |
2118 | while (*(++acl_text) != 0 && *acl_text != '\n'); | |
2119 | } | |
2120 | ||
2121 | /* We have the start of a continuation line. Move all the rest of the data | |
2122 | to join onto the previous line, and then find its end. If the end is not a | |
2123 | newline, we are done. Otherwise loop to look for another continuation. */ | |
2124 | ||
2125 | memmove(cont, acl_text, acl_text_end - acl_text); | |
2126 | acl_text_end -= acl_text - cont; | |
2127 | acl_text = cont; | |
2128 | while (*acl_text != 0 && *acl_text != '\n') acl_text++; | |
2129 | if (*acl_text == 0) return yield; | |
2130 | } | |
2131 | ||
2132 | /* Control does not reach here */ | |
2133 | } | |
2134 | ||
2135 | ||
2136 | ||
2137 | ||
2138 | ||
2139 | /************************************************* | |
2140 | * Check access using an ACL * | |
2141 | *************************************************/ | |
2142 | ||
2143 | /* This function is called from address_check. It may recurse via | |
2144 | acl_check_condition() - hence the use of a level to stop looping. The ACL is | |
2145 | passed as a string which is expanded. A forced failure implies no access check | |
2146 | is required. If the result is a single word, it is taken as the name of an ACL | |
2147 | which is sought in the global ACL tree. Otherwise, it is taken as literal ACL | |
2148 | text, complete with newlines, and parsed as such. In both cases, the ACL check | |
2149 | is then run. This function uses an auxiliary function for acl_read() to call | |
2150 | for reading individual lines of a literal ACL. This is acl_getline(), which | |
2151 | appears immediately above. | |
2152 | ||
2153 | Arguments: | |
2154 | where where called from | |
2155 | addr address item when called from RCPT; otherwise NULL | |
2156 | s the input string; NULL is the same as an empty ACL => DENY | |
2157 | level the nesting level | |
2158 | user_msgptr where to put a user error (for SMTP response) | |
2159 | log_msgptr where to put a logging message (not for SMTP response) | |
2160 | ||
2161 | Returns: OK access is granted | |
2162 | DISCARD access is apparently granted... | |
2163 | FAIL access is denied | |
2164 | FAIL_DROP access is denied; drop the connection | |
2165 | DEFER can't tell at the moment | |
2166 | ERROR disaster | |
2167 | */ | |
2168 | ||
2169 | static int | |
2170 | acl_check_internal(int where, address_item *addr, uschar *s, int level, | |
2171 | uschar **user_msgptr, uschar **log_msgptr) | |
2172 | { | |
2173 | int fd = -1; | |
2174 | acl_block *acl = NULL; | |
2175 | uschar *acl_name = US"inline ACL"; | |
2176 | uschar *ss; | |
2177 | ||
2178 | /* Catch configuration loops */ | |
2179 | ||
2180 | if (level > 20) | |
2181 | { | |
2182 | *log_msgptr = US"ACL nested too deep: possible loop"; | |
2183 | return ERROR; | |
2184 | } | |
2185 | ||
2186 | if (s == NULL) | |
2187 | { | |
2188 | HDEBUG(D_acl) debug_printf("ACL is NULL: implicit DENY\n"); | |
2189 | return FAIL; | |
2190 | } | |
2191 | ||
2192 | /* At top level, we expand the incoming string. At lower levels, it has already | |
2193 | been expanded as part of condition processing. */ | |
2194 | ||
2195 | if (level == 0) | |
2196 | { | |
2197 | ss = expand_string(s); | |
2198 | if (ss == NULL) | |
2199 | { | |
2200 | if (expand_string_forcedfail) return OK; | |
2201 | *log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", s, | |
2202 | expand_string_message); | |
2203 | return ERROR; | |
2204 | } | |
2205 | } | |
2206 | else ss = s; | |
2207 | ||
2208 | while (isspace(*ss))ss++; | |
2209 | ||
2210 | /* If we can't find a named ACL, the default is to parse it as an inline one. | |
2211 | (Unless it begins with a slash; non-existent files give rise to an error.) */ | |
2212 | ||
2213 | acl_text = ss; | |
2214 | ||
2215 | /* Handle the case of a string that does not contain any spaces. Look for a | |
2216 | named ACL among those read from the configuration, or a previously read file. | |
2217 | It is possible that the pointer to the ACL is NULL if the configuration | |
2218 | contains a name with no data. If not found, and the text begins with '/', | |
2219 | read an ACL from a file, and save it so it can be re-used. */ | |
2220 | ||
2221 | if (Ustrchr(ss, ' ') == NULL) | |
2222 | { | |
2223 | tree_node *t = tree_search(acl_anchor, ss); | |
2224 | if (t != NULL) | |
2225 | { | |
2226 | acl = (acl_block *)(t->data.ptr); | |
2227 | if (acl == NULL) | |
2228 | { | |
2229 | HDEBUG(D_acl) debug_printf("ACL \"%s\" is empty: implicit DENY\n", ss); | |
2230 | return FAIL; | |
2231 | } | |
2232 | acl_name = string_sprintf("ACL \"%s\"", ss); | |
2233 | HDEBUG(D_acl) debug_printf("using ACL \"%s\"\n", ss); | |
2234 | } | |
2235 | ||
2236 | else if (*ss == '/') | |
2237 | { | |
2238 | struct stat statbuf; | |
2239 | fd = Uopen(ss, O_RDONLY, 0); | |
2240 | if (fd < 0) | |
2241 | { | |
2242 | *log_msgptr = string_sprintf("failed to open ACL file \"%s\": %s", ss, | |
2243 | strerror(errno)); | |
2244 | return ERROR; | |
2245 | } | |
2246 | ||
2247 | if (fstat(fd, &statbuf) != 0) | |
2248 | { | |
2249 | *log_msgptr = string_sprintf("failed to fstat ACL file \"%s\": %s", ss, | |
2250 | strerror(errno)); | |
2251 | return ERROR; | |
2252 | } | |
2253 | ||
2254 | acl_text = store_get(statbuf.st_size + 1); | |
2255 | acl_text_end = acl_text + statbuf.st_size + 1; | |
2256 | ||
2257 | if (read(fd, acl_text, statbuf.st_size) != statbuf.st_size) | |
2258 | { | |
2259 | *log_msgptr = string_sprintf("failed to read ACL file \"%s\": %s", | |
2260 | ss, strerror(errno)); | |
2261 | return ERROR; | |
2262 | } | |
2263 | acl_text[statbuf.st_size] = 0; | |
2264 | close(fd); | |
2265 | ||
2266 | acl_name = string_sprintf("ACL \"%s\"", ss); | |
2267 | HDEBUG(D_acl) debug_printf("read ACL from file %s\n", ss); | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | /* Parse an ACL that is still in text form. If it came from a file, remember it | |
2272 | in the ACL tree, having read it into the POOL_PERM store pool so that it | |
2273 | persists between multiple messages. */ | |
2274 | ||
2275 | if (acl == NULL) | |
2276 | { | |
2277 | int old_pool = store_pool; | |
2278 | if (fd >= 0) store_pool = POOL_PERM; | |
2279 | acl = acl_read(acl_getline, log_msgptr); | |
2280 | store_pool = old_pool; | |
2281 | if (acl == NULL && *log_msgptr != NULL) return ERROR; | |
2282 | if (fd >= 0) | |
2283 | { | |
2284 | tree_node *t = store_get_perm(sizeof(tree_node) + Ustrlen(ss)); | |
2285 | Ustrcpy(t->name, ss); | |
2286 | t->data.ptr = acl; | |
2287 | (void)tree_insertnode(&acl_anchor, t); | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | /* Now we have an ACL to use. It's possible it may be NULL. */ | |
2292 | ||
2293 | while (acl != NULL) | |
2294 | { | |
2295 | int cond; | |
2296 | int basic_errno = 0; | |
2297 | BOOL endpass_seen = FALSE; | |
2298 | ||
2299 | *log_msgptr = *user_msgptr = NULL; | |
2300 | acl_temp_details = FALSE; | |
2301 | ||
2302 | if (where == ACL_WHERE_QUIT && | |
2303 | acl->verb != ACL_ACCEPT && | |
2304 | acl->verb != ACL_WARN) | |
2305 | { | |
2306 | *log_msgptr = string_sprintf("\"%s\" is not allowed in a QUIT ACL", | |
2307 | verbs[acl->verb]); | |
2308 | return ERROR; | |
2309 | } | |
2310 | ||
2311 | HDEBUG(D_acl) debug_printf("processing \"%s\"\n", verbs[acl->verb]); | |
2312 | ||
2313 | /* Clear out any search error message from a previous check before testing | |
2314 | this condition. */ | |
2315 | ||
2316 | search_error_message = NULL; | |
2317 | cond = acl_check_condition(acl->verb, acl->condition, where, addr, level, | |
2318 | &endpass_seen, user_msgptr, log_msgptr, &basic_errno); | |
2319 | ||
2320 | /* Handle special returns: DEFER causes a return except on a WARN verb; | |
2321 | ERROR always causes a return. */ | |
2322 | ||
2323 | switch (cond) | |
2324 | { | |
2325 | case DEFER: | |
2326 | HDEBUG(D_acl) debug_printf("%s: condition test deferred\n", verbs[acl->verb]); | |
2327 | if (basic_errno != ERRNO_CALLOUTDEFER) | |
2328 | { | |
2329 | if (search_error_message != NULL && *search_error_message != 0) | |
2330 | *log_msgptr = search_error_message; | |
2331 | if (smtp_return_error_details) acl_temp_details = TRUE; | |
2332 | } | |
2333 | else | |
2334 | { | |
2335 | acl_temp_details = TRUE; | |
2336 | } | |
2337 | if (acl->verb != ACL_WARN) return DEFER; | |
2338 | break; | |
2339 | ||
2340 | default: /* Paranoia */ | |
2341 | case ERROR: | |
2342 | HDEBUG(D_acl) debug_printf("%s: condition test error\n", verbs[acl->verb]); | |
2343 | return ERROR; | |
2344 | ||
2345 | case OK: | |
2346 | HDEBUG(D_acl) debug_printf("%s: condition test succeeded\n", | |
2347 | verbs[acl->verb]); | |
2348 | break; | |
2349 | ||
2350 | case FAIL: | |
2351 | HDEBUG(D_acl) debug_printf("%s: condition test failed\n", verbs[acl->verb]); | |
2352 | break; | |
2353 | ||
2354 | /* DISCARD and DROP can happen only from a nested ACL condition, and | |
2355 | DISCARD can happen only for an "accept" or "discard" verb. */ | |
2356 | ||
2357 | case DISCARD: | |
2358 | HDEBUG(D_acl) debug_printf("%s: condition test yielded \"discard\"\n", | |
2359 | verbs[acl->verb]); | |
2360 | break; | |
2361 | ||
2362 | case FAIL_DROP: | |
2363 | HDEBUG(D_acl) debug_printf("%s: condition test yielded \"drop\"\n", | |
2364 | verbs[acl->verb]); | |
2365 | break; | |
2366 | } | |
2367 | ||
2368 | /* At this point, cond for most verbs is either OK or FAIL or (as a result of | |
2369 | a nested ACL condition) FAIL_DROP. However, for WARN, cond may be DEFER, and | |
2370 | for ACCEPT and DISCARD, it may be DISCARD after a nested ACL call. */ | |
2371 | ||
2372 | switch(acl->verb) | |
2373 | { | |
2374 | case ACL_ACCEPT: | |
2375 | if (cond == OK || cond == DISCARD) return cond; | |
2376 | if (endpass_seen) | |
2377 | { | |
2378 | HDEBUG(D_acl) debug_printf("accept: endpass encountered - denying access\n"); | |
2379 | return cond; | |
2380 | } | |
2381 | break; | |
2382 | ||
2383 | case ACL_DEFER: | |
2384 | if (cond == OK) | |
2385 | { | |
2386 | acl_temp_details = TRUE; | |
2387 | return DEFER; | |
2388 | } | |
2389 | break; | |
2390 | ||
2391 | case ACL_DENY: | |
2392 | if (cond == OK) return FAIL; | |
2393 | break; | |
2394 | ||
2395 | case ACL_DISCARD: | |
2396 | if (cond == OK || cond == DISCARD) return DISCARD; | |
2397 | if (endpass_seen) | |
2398 | { | |
2399 | HDEBUG(D_acl) debug_printf("discard: endpass encountered - denying access\n"); | |
2400 | return cond; | |
2401 | } | |
2402 | break; | |
2403 | ||
2404 | case ACL_DROP: | |
2405 | if (cond == OK) return FAIL_DROP; | |
2406 | break; | |
2407 | ||
2408 | case ACL_REQUIRE: | |
2409 | if (cond != OK) return cond; | |
2410 | break; | |
2411 | ||
2412 | case ACL_WARN: | |
2413 | if (cond == OK) | |
2414 | acl_warn(where, *user_msgptr, *log_msgptr); | |
2415 | else if (cond == DEFER) | |
2416 | acl_warn(where, NULL, string_sprintf("ACL \"warn\" statement skipped: " | |
2417 | "condition test deferred: %s", | |
2418 | (*log_msgptr == NULL)? US"" : *log_msgptr)); | |
2419 | *log_msgptr = *user_msgptr = NULL; /* In case implicit DENY follows */ | |
2420 | break; | |
2421 | ||
2422 | default: | |
2423 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "internal ACL error: unknown verb %d", | |
2424 | acl->verb); | |
2425 | break; | |
2426 | } | |
2427 | ||
2428 | /* Pass to the next ACL item */ | |
2429 | ||
2430 | acl = acl->next; | |
2431 | } | |
2432 | ||
2433 | /* We have reached the end of the ACL. This is an implicit DENY. */ | |
2434 | ||
2435 | HDEBUG(D_acl) debug_printf("end of %s: implicit DENY\n", acl_name); | |
2436 | return FAIL; | |
2437 | } | |
2438 | ||
2439 | ||
2440 | /************************************************* | |
2441 | * Check access using an ACL * | |
2442 | *************************************************/ | |
2443 | ||
2444 | /* This is the external interface for ACL checks. It sets up an address and the | |
2445 | expansions for $domain and $local_part when called after RCPT, then calls | |
2446 | acl_check_internal() to do the actual work. | |
2447 | ||
2448 | Arguments: | |
2449 | where ACL_WHERE_xxxx indicating where called from | |
2450 | data_string RCPT address, or SMTP command argument, or NULL | |
2451 | s the input string; NULL is the same as an empty ACL => DENY | |
2452 | user_msgptr where to put a user error (for SMTP response) | |
2453 | log_msgptr where to put a logging message (not for SMTP response) | |
2454 | ||
2455 | Returns: OK access is granted by an ACCEPT verb | |
2456 | DISCARD access is granted by a DISCARD verb | |
2457 | FAIL access is denied | |
2458 | FAIL_DROP access is denied; drop the connection | |
2459 | DEFER can't tell at the moment | |
2460 | ERROR disaster | |
2461 | */ | |
2462 | ||
2463 | int | |
2464 | acl_check(int where, uschar *data_string, uschar *s, uschar **user_msgptr, | |
2465 | uschar **log_msgptr) | |
2466 | { | |
2467 | int rc; | |
2468 | address_item adb; | |
2469 | address_item *addr; | |
2470 | ||
2471 | *user_msgptr = *log_msgptr = NULL; | |
2472 | sender_verified_failed = NULL; | |
2473 | ||
2474 | if (where == ACL_WHERE_RCPT) | |
2475 | { | |
2476 | adb = address_defaults; | |
2477 | addr = &adb; | |
2478 | addr->address = data_string; | |
2479 | if (deliver_split_address(addr) == DEFER) | |
2480 | { | |
2481 | *log_msgptr = US"defer in percent_hack_domains check"; | |
2482 | return DEFER; | |
2483 | } | |
2484 | deliver_domain = addr->domain; | |
2485 | deliver_localpart = addr->local_part; | |
2486 | } | |
2487 | else | |
2488 | { | |
2489 | addr = NULL; | |
2490 | smtp_command_argument = data_string; | |
2491 | } | |
2492 | ||
2493 | rc = acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr); | |
2494 | ||
2495 | smtp_command_argument = deliver_domain = | |
2a3eea10 | 2496 | deliver_localpart = deliver_address_data = sender_address_data = NULL; |
059ec3d9 PH |
2497 | |
2498 | /* A DISCARD response is permitted only for message ACLs, excluding the PREDATA | |
2499 | ACL, which is really in the middle of an SMTP command. */ | |
2500 | ||
2501 | if (rc == DISCARD) | |
2502 | { | |
2503 | if (where > ACL_WHERE_NOTSMTP || where == ACL_WHERE_PREDATA) | |
2504 | { | |
2505 | log_write(0, LOG_MAIN|LOG_PANIC, "\"discard\" verb not allowed in %s " | |
2506 | "ACL", acl_wherenames[where]); | |
2507 | return ERROR; | |
2508 | } | |
2509 | return DISCARD; | |
2510 | } | |
2511 | ||
2512 | /* A DROP response is not permitted from MAILAUTH */ | |
2513 | ||
2514 | if (rc == FAIL_DROP && where == ACL_WHERE_MAILAUTH) | |
2515 | { | |
2516 | log_write(0, LOG_MAIN|LOG_PANIC, "\"drop\" verb not allowed in %s " | |
2517 | "ACL", acl_wherenames[where]); | |
2518 | return ERROR; | |
2519 | } | |
2520 | ||
2521 | /* Before giving an error response, take a look at the length of any user | |
2522 | message, and split it up into multiple lines if possible. */ | |
2523 | ||
2524 | if (rc != OK && *user_msgptr != NULL && Ustrlen(*user_msgptr) > 75) | |
2525 | { | |
2526 | uschar *s = *user_msgptr = string_copy(*user_msgptr); | |
2527 | uschar *ss = s; | |
2528 | ||
2529 | for (;;) | |
2530 | { | |
2531 | int i = 0; | |
2532 | while (i < 75 && *ss != 0 && *ss != '\n') ss++, i++; | |
2533 | if (*ss == 0) break; | |
2534 | if (*ss == '\n') | |
2535 | s = ++ss; | |
2536 | else | |
2537 | { | |
2538 | uschar *t = ss + 1; | |
2539 | uschar *tt = NULL; | |
2540 | while (--t > s + 35) | |
2541 | { | |
2542 | if (*t == ' ') | |
2543 | { | |
2544 | if (t[-1] == ':') { tt = t; break; } | |
2545 | if (tt == NULL) tt = t; | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | if (tt == NULL) /* Can't split behind - try ahead */ | |
2550 | { | |
2551 | t = ss + 1; | |
2552 | while (*t != 0) | |
2553 | { | |
2554 | if (*t == ' ' || *t == '\n') | |
2555 | { tt = t; break; } | |
2556 | t++; | |
2557 | } | |
2558 | } | |
2559 | ||
2560 | if (tt == NULL) break; /* Can't find anywhere to split */ | |
2561 | *tt = '\n'; | |
2562 | s = ss = tt+1; | |
2563 | } | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | return rc; | |
2568 | } | |
2569 | ||
2570 | /* End of acl.c */ |