1 |
#include <stdio.h> |
2 |
#include <stdlib.h> |
3 |
#include <string.h> |
4 |
#include <strings.h> |
5 |
#include <ctype.h> |
6 |
#include <sys/types.h> /* IEEE Std 1003.1-2001 transitional. */ |
7 |
#include <regex.h> |
8 |
#include <setjmp.h> |
9 |
|
10 |
#include "config.h" |
11 |
#include "imapfilter.h" |
12 |
#include "buffer.h" |
13 |
|
14 |
|
15 |
extern connection_t connpri, connaux; |
16 |
extern jmp_buf acctloop; |
17 |
|
18 |
buffer_t ibuf; /* Input buffer. */ |
19 |
|
20 |
|
21 |
void receive_response(connection_t * conn, char *buf); |
22 |
void response_bye(char *buf); |
23 |
int analyze_response(connection_t * conn, char *buf); |
24 |
|
25 |
|
26 |
/* |
27 |
* Read one packet of data that the server sent. |
28 |
*/ |
29 |
void |
30 |
receive_response(connection_t * conn, char *buf) |
31 |
{ |
32 |
|
33 |
if (socket_read(conn, buf) == ERROR_NETWORK) |
34 |
longjmp(acctloop, -1); |
35 |
|
36 |
debug("getting response (%s):\n\n%s\n", |
37 |
(conn == &connpri ? "primary" : "auxiliary"), buf); |
38 |
} |
39 |
|
40 |
|
41 |
/* |
42 |
* Get server response to client's request. |
43 |
*/ |
44 |
int |
45 |
response_generic(connection_t * conn, unsigned int tag) |
46 |
{ |
47 |
|
48 |
buffer_reset(&ibuf); |
49 |
|
50 |
do { |
51 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
52 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
53 |
response_bye(ibuf.data); |
54 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
55 |
|
56 |
return analyze_response(conn, ibuf.data); |
57 |
} |
58 |
|
59 |
|
60 |
/* |
61 |
* Check if server sent a BYE response (connection is closed immediately). |
62 |
*/ |
63 |
void |
64 |
response_bye(char *buf) |
65 |
{ |
66 |
|
67 |
if (strcasestr(buf, "* BYE")) |
68 |
longjmp(acctloop, -1); |
69 |
} |
70 |
|
71 |
|
72 |
/* |
73 |
* Process the greeting that server sends during connection. |
74 |
*/ |
75 |
int |
76 |
response_greeting(connection_t * conn) |
77 |
{ |
78 |
|
79 |
buffer_reset(&ibuf); |
80 |
|
81 |
receive_response(conn, ibuf.data); |
82 |
|
83 |
verbose("%s: %s", (conn == &connpri ? "S" : "s"), ibuf); |
84 |
|
85 |
response_bye(ibuf.data); |
86 |
|
87 |
if (strcasestr(ibuf.data, "* PREAUTH")) |
88 |
return RESPONSE_PREAUTH; |
89 |
|
90 |
return RESPONSE_OK; |
91 |
} |
92 |
|
93 |
|
94 |
/* |
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* Process the data that server sent due to IMAP LOGOUT client request. |
96 |
*/ |
97 |
int |
98 |
response_logout(connection_t * conn, unsigned int tag) |
99 |
{ |
100 |
|
101 |
buffer_reset(&ibuf); |
102 |
|
103 |
do { |
104 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
105 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
106 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
107 |
|
108 |
return analyze_response(conn, ibuf.data); |
109 |
} |
110 |
|
111 |
|
112 |
/* |
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* Process the data that server sent due to IMAP CAPABILITY client request. |
114 |
*/ |
115 |
int |
116 |
response_capability(connection_t * conn, unsigned int tag) |
117 |
{ |
118 |
|
119 |
buffer_reset(&ibuf); |
120 |
|
121 |
do { |
122 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
123 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
124 |
response_bye(ibuf.data); |
125 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
126 |
|
127 |
if (!strcasestr(ibuf.data, "IMAP4rev1")) { |
128 |
error("server does not support IMAP4rev1 protocol\n"); |
129 |
return -2; |
130 |
} |
131 |
if (strcasestr(ibuf.data, "NAMESPACE")) |
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conn->caps |= CAPS_NAMESPACE; |
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#ifdef CRAM_MD5 |
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if (strcasestr(ibuf.data, "AUTH=CRAM-MD5")) |
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conn->caps |= CAPS_CRAMMD5; |
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#endif |
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#ifdef SSL_TLS |
138 |
if (strcasestr(ibuf.data, "STARTTLS")) |
139 |
conn->caps |= CAPS_STARTTLS; |
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#endif |
141 |
return analyze_response(conn, ibuf.data); |
142 |
} |
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|
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|
145 |
#ifdef CRAM_MD5 |
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/* |
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* Process the data that server sent due to IMAP AUTHENTICATE client request. |
148 |
*/ |
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int |
150 |
response_authenticate(connection_t * conn, unsigned int tag, unsigned char **cont) |
151 |
{ |
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int i; |
153 |
char *c; |
154 |
|
155 |
buffer_reset(&ibuf); |
156 |
|
157 |
do { |
158 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
159 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
160 |
response_bye(ibuf.data); |
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} while (strlen(ibuf.data) == RESPONSE_BUF && |
162 |
!strcasestr(ibuf.data, ultostr(tag, 16))); |
163 |
|
164 |
if (cont != NULL && ibuf.data[0] == '+' && ibuf.data[1] == ' ') { |
165 |
c = *cont = (unsigned char *)xmalloc(strlen(ibuf.data) + 1); |
166 |
|
167 |
for (i = 2; ibuf.data[i] != '\r'; i++) |
168 |
*c++ = ibuf.data[i]; |
169 |
|
170 |
*c = '\0'; |
171 |
} |
172 |
return analyze_response(conn, ibuf.data); |
173 |
} |
174 |
#endif |
175 |
|
176 |
|
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/* |
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* Process the data that server sent due to IMAP NAMESPACE client request. |
179 |
*/ |
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int |
181 |
response_namespace(connection_t * conn, unsigned int tag) |
182 |
{ |
183 |
char *c, *d; |
184 |
|
185 |
buffer_reset(&ibuf); |
186 |
|
187 |
do { |
188 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
189 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
190 |
response_bye(ibuf.data); |
191 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
192 |
|
193 |
if ((c = strcasestr(ibuf.data, "* NAMESPACE"))) { |
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c += 12; |
195 |
if (strncasecmp(c, "NIL", 3)) { |
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c = strchr(c, '"') + 1; |
197 |
d = strchr(c, '"') + 1; |
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|
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strncat(conn->ns.prefix, c, d - c - 1); |
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conn->ns.delim = *(strchr(d, '"') + 1); |
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} |
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} |
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debug("namespace (%s): '%s' '%c'\n", |
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(conn == &connpri ? "primary" : "auxiliary"), conn->ns.prefix, |
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conn->ns.delim); |
206 |
return analyze_response(conn, ibuf.data); |
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} |
208 |
|
209 |
|
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/* |
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* Process the data that server sent due to IMAP STATUS client request. |
212 |
*/ |
213 |
int |
214 |
response_status(connection_t * conn, unsigned int tag, char *mbox) |
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{ |
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int r; |
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unsigned int exist, recent, unseen; |
218 |
char *c; |
219 |
|
220 |
exist = recent = unseen = 0; |
221 |
|
222 |
buffer_reset(&ibuf); |
223 |
|
224 |
do { |
225 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
226 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
227 |
response_bye(ibuf.data); |
228 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
229 |
|
230 |
r = analyze_response(conn, ibuf.data); |
231 |
|
232 |
if (r == RESPONSE_NO) |
233 |
return -2; |
234 |
|
235 |
if ((c = strcasestr(ibuf.data, "MESSAGES"))) { |
236 |
c += 9; |
237 |
exist = strtoul(c, NULL, 10); |
238 |
} |
239 |
if ((c = strcasestr(ibuf.data, "RECENT"))) { |
240 |
c += 7; |
241 |
recent = strtoul(c, NULL, 10); |
242 |
} |
243 |
if ((c = strcasestr(ibuf.data, "UNSEEN"))) { |
244 |
c += 7; |
245 |
unseen = strtoul(c, NULL, 10); |
246 |
} |
247 |
if (exist == 0) { |
248 |
info("No messages in mailbox \"%s\".\n", mbox); |
249 |
return -2; |
250 |
} |
251 |
info("%d message%s, %d recent, %d unseen, in mailbox \"%s\".\n", exist, |
252 |
plural(exist), recent, unseen, mbox); |
253 |
|
254 |
return r; |
255 |
} |
256 |
|
257 |
|
258 |
/* |
259 |
* Process the data that server sent due to IMAP SELECT client request. |
260 |
*/ |
261 |
int |
262 |
response_select(connection_t * conn, unsigned int tag) |
263 |
{ |
264 |
|
265 |
buffer_reset(&ibuf); |
266 |
|
267 |
do { |
268 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
269 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
270 |
response_bye(ibuf.data); |
271 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
272 |
|
273 |
if (strcasestr(ibuf.data, "[READ-ONLY]")) |
274 |
return RESPONSE_READONLY; |
275 |
|
276 |
return analyze_response(conn, ibuf.data); |
277 |
} |
278 |
|
279 |
|
280 |
/* |
281 |
* Process the data that server sent due to IMAP SEARCH client request. |
282 |
*/ |
283 |
int |
284 |
response_search(connection_t * conn, unsigned int tag, char **mesgs) |
285 |
{ |
286 |
char *c, *m; |
287 |
unsigned int blen; |
288 |
|
289 |
buffer_reset(&ibuf); |
290 |
|
291 |
do { |
292 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
293 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
294 |
response_bye(ibuf.data); |
295 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
296 |
|
297 |
if ((c = strcasestr(ibuf.data, "* SEARCH "))) { |
298 |
blen = strlen(ibuf.data); |
299 |
|
300 |
m = *mesgs = (char *)xmalloc(blen + 1); |
301 |
|
302 |
c += 9; |
303 |
|
304 |
while (*c != '\0' && (isdigit(*c) || *c == ' ')) |
305 |
*(m++) = *(c++); |
306 |
|
307 |
*m = 0; |
308 |
} |
309 |
return analyze_response(conn, ibuf.data); |
310 |
} |
311 |
|
312 |
|
313 |
/* |
314 |
* Process the data that server sent due to IMAP FETCH client request. |
315 |
*/ |
316 |
int |
317 |
response_fetch(connection_t * conn, unsigned int tag, int reset, char *fetch) |
318 |
{ |
319 |
unsigned int i; |
320 |
static unsigned int s; |
321 |
char *b; |
322 |
|
323 |
if (reset) { |
324 |
s = 0; |
325 |
return 0; |
326 |
} |
327 |
i = 0; |
328 |
|
329 |
buffer_reset(&ibuf); |
330 |
|
331 |
do { |
332 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
333 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
334 |
response_bye(ibuf.data); |
335 |
} while (strlen(ibuf.data) < RESPONSE_BUF && |
336 |
!strcasestr(ibuf.data, ultostr(tag, 16))); |
337 |
|
338 |
b = ibuf.data; |
339 |
|
340 |
if (s == 0) { |
341 |
if ((b = strstr(b, "}\r\n"))) { |
342 |
while (b - ibuf.data > 0) |
343 |
if (*--b == '{') |
344 |
break; |
345 |
s = atoi(++b) - 2; |
346 |
b = strchr(b, '}'); |
347 |
b += 3; |
348 |
} else { |
349 |
return RESPONSE_NULLBODY; /* Null body. */ |
350 |
} |
351 |
} |
352 |
while (*b != '\0' && s-- != 0) |
353 |
fetch[i++] = *(b++); |
354 |
|
355 |
fetch[i] = '\0'; |
356 |
|
357 |
return analyze_response(conn, ibuf.data); |
358 |
} |
359 |
|
360 |
|
361 |
/* |
362 |
* Process the data that server sent due to IMAP FETCH FAST client request. |
363 |
*/ |
364 |
int |
365 |
response_fetchfast(connection_t * conn, char **flags, char **date, |
366 |
unsigned int *size, unsigned int tag) |
367 |
{ |
368 |
char *c, *m; |
369 |
unsigned int blen; |
370 |
|
371 |
*size = 0; |
372 |
|
373 |
buffer_reset(&ibuf); |
374 |
|
375 |
do { |
376 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
377 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
378 |
response_bye(ibuf.data); |
379 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
380 |
|
381 |
if ((c = strcasestr(ibuf.data, "FETCH (FLAGS ("))) { |
382 |
blen = strlen(ibuf.data); |
383 |
|
384 |
m = *flags = (char *)xmalloc(blen + 1); |
385 |
|
386 |
c += 14; |
387 |
|
388 |
while (*c != '\0' && *c != ')') { |
389 |
/* The \Recent flag can not be altered by the client. */ |
390 |
if (*c == '\\') { |
391 |
if (strcasestr(c - 1, "(\\Recent)") || |
392 |
strcasestr(c - 1, " \\Recent)")) |
393 |
break; |
394 |
else if (strcasestr(c, "\\Recent ")) |
395 |
c += 8; |
396 |
} |
397 |
*(m++) = *(c++); |
398 |
} |
399 |
|
400 |
*m = 0; |
401 |
} |
402 |
if ((c = strcasestr(ibuf.data, " INTERNALDATE \""))) { |
403 |
blen = strlen(ibuf.data); |
404 |
|
405 |
m = *date = (char *)xmalloc(blen + 1); |
406 |
|
407 |
c += 15; |
408 |
|
409 |
while (*c != '\0' && *c != '"') |
410 |
*(m++) = *(c++); |
411 |
|
412 |
*m = 0; |
413 |
} |
414 |
if ((c = strcasestr(ibuf.data, " RFC822.SIZE "))) { |
415 |
c += 13; |
416 |
*size = strtoul(c, NULL, 10); |
417 |
} |
418 |
return analyze_response(conn, ibuf.data); |
419 |
} |
420 |
|
421 |
|
422 |
/* |
423 |
* Process the data that server sent due to IMAP APPEND client request. |
424 |
*/ |
425 |
int |
426 |
response_append(connection_t * conn, unsigned int tag) |
427 |
{ |
428 |
int r; |
429 |
|
430 |
r = RESPONSE_OK; |
431 |
|
432 |
buffer_reset(&ibuf); |
433 |
|
434 |
do { |
435 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
436 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
437 |
response_bye(ibuf.data); |
438 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
439 |
|
440 |
if ((r = analyze_response(conn, ibuf.data)) == RESPONSE_NO && |
441 |
strcasestr(ibuf.data, "[TRYCREATE]")) |
442 |
return RESPONSE_TRYCREATE; |
443 |
|
444 |
return r; |
445 |
} |
446 |
|
447 |
|
448 |
/* |
449 |
* Process the data that server sent due to IMAP COPY client request. |
450 |
*/ |
451 |
int |
452 |
response_copy(connection_t * conn, unsigned int tag) |
453 |
{ |
454 |
int r; |
455 |
|
456 |
r = RESPONSE_OK; |
457 |
|
458 |
buffer_reset(&ibuf); |
459 |
|
460 |
do { |
461 |
buffer_check(&ibuf, strlen(ibuf.data) + RESPONSE_BUF); |
462 |
receive_response(conn, ibuf.data + strlen(ibuf.data)); |
463 |
response_bye(ibuf.data); |
464 |
} while (!strcasestr(ibuf.data, ultostr(tag, 16))); |
465 |
|
466 |
if ((r = analyze_response(conn, ibuf.data)) == RESPONSE_NO && |
467 |
strcasestr(ibuf.data, "[TRYCREATE]")) |
468 |
return RESPONSE_TRYCREATE; |
469 |
|
470 |
return r; |
471 |
} |
472 |
|
473 |
|
474 |
/* |
475 |
* Check if response of server to client's request was succesfully |
476 |
* delivered or there was some kind of error. |
477 |
*/ |
478 |
int |
479 |
analyze_response(connection_t * conn, char *buf) |
480 |
{ |
481 |
int r; |
482 |
regex_t creg; |
483 |
regmatch_t match[3]; |
484 |
const char *reg; |
485 |
char result[RESULT_BUF]; |
486 |
|
487 |
r = RESPONSE_OK; |
488 |
reg = "[[:xdigit:]]{4,4} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
489 |
result[0] = '\0'; |
490 |
|
491 |
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
492 |
|
493 |
if (!regexec(&creg, buf, 3, match, 0)) { |
494 |
strncat(result, buf + match[1].rm_so, |
495 |
min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
496 |
|
497 |
if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
498 |
r = RESPONSE_NO; |
499 |
else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
500 |
r = RESPONSE_BAD; |
501 |
|
502 |
verbose("%s: %s", (conn == &connpri ? "S" : "s"), |
503 |
buf + match[0].rm_so); |
504 |
} else |
505 |
r = RESPONSE_NONE; |
506 |
|
507 |
regfree(&creg); |
508 |
|
509 |
return r; |
510 |
} |