Commit | Line | Data |
---|---|---|
a9ccd69a | 1 | /* $Cambridge: exim/src/src/malware.c,v 1.15 2006/07/06 14:19:50 ph10 Exp $ */ |
8523533c TK |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */ | |
8 | /* License: GPL */ | |
9 | ||
10 | /* Code for calling virus (malware) scanners. Called from acl.c. */ | |
11 | ||
12 | #include "exim.h" | |
13 | #ifdef WITH_CONTENT_SCAN | |
14 | ||
15 | /* declaration of private routines */ | |
16 | int mksd_scan_packed(int sock); | |
17 | ||
18 | /* SHUT_WR seems to be undefined on Unixware? */ | |
19 | #ifndef SHUT_WR | |
20 | #define SHUT_WR 1 | |
21 | #endif | |
22 | ||
a9ccd69a PH |
23 | |
24 | #define MALWARE_TIMEOUT 120 | |
25 | ||
26 | ||
8523533c TK |
27 | #define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */ |
28 | #define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */ | |
29 | #define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */ | |
30 | ||
2376f2f5 TK |
31 | #define DERR_READ_ERR (1<<0) /* read error */ |
32 | #define DERR_NOMEMORY (1<<2) /* no memory */ | |
33 | #define DERR_TIMEOUT (1<<9) /* scan timeout has run out */ | |
34 | #define DERR_BAD_CALL (1<<15) /* wrong command */ | |
35 | ||
8e669ac1 | 36 | /* Routine to check whether a system is big- or litte-endian. |
8523533c TK |
37 | Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html |
38 | Needed for proper kavdaemon implementation. Sigh. */ | |
39 | #define BIG_MY_ENDIAN 0 | |
40 | #define LITTLE_MY_ENDIAN 1 | |
41 | int test_byte_order(void); | |
42 | int test_byte_order() { | |
43 | short int word = 0x0001; | |
44 | char *byte = (char *) &word; | |
45 | return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN); | |
46 | } | |
47 | ||
48 | uschar malware_name_buffer[256]; | |
49 | int malware_ok = 0; | |
50 | ||
51 | int malware(uschar **listptr) { | |
52 | int sep = 0; | |
53 | uschar *list = *listptr; | |
54 | uschar *av_scanner_work = av_scanner; | |
55 | uschar *scanner_name; | |
56 | uschar scanner_name_buffer[16]; | |
57 | uschar *malware_regex; | |
58 | uschar malware_regex_buffer[64]; | |
59 | uschar malware_regex_default[] = ".+"; | |
f7b63901 | 60 | unsigned long mbox_size; |
8523533c TK |
61 | FILE *mbox_file; |
62 | int roffset; | |
63 | const pcre *re; | |
64 | const uschar *rerror; | |
8e669ac1 | 65 | |
8523533c TK |
66 | /* make sure the eml mbox file is spooled up */ |
67 | mbox_file = spool_mbox(&mbox_size); | |
68 | if (mbox_file == NULL) { | |
69 | /* error while spooling */ | |
70 | log_write(0, LOG_MAIN|LOG_PANIC, | |
71 | "malware acl condition: error while creating mbox spool file"); | |
8e669ac1 | 72 | return DEFER; |
8523533c TK |
73 | }; |
74 | /* none of our current scanners need the mbox | |
75 | file as a stream, so we can close it right away */ | |
f1e894f3 | 76 | (void)fclose(mbox_file); |
8e669ac1 | 77 | |
8523533c TK |
78 | /* extract the malware regex to match against from the option list */ |
79 | if ((malware_regex = string_nextinlist(&list, &sep, | |
80 | malware_regex_buffer, | |
81 | sizeof(malware_regex_buffer))) != NULL) { | |
8e669ac1 | 82 | |
8523533c | 83 | /* parse 1st option */ |
8e669ac1 | 84 | if ( (strcmpic(malware_regex,US"false") == 0) || |
8523533c TK |
85 | (Ustrcmp(malware_regex,"0") == 0) ) { |
86 | /* explicitly no matching */ | |
87 | return FAIL; | |
88 | }; | |
8e669ac1 | 89 | |
8523533c | 90 | /* special cases (match anything except empty) */ |
8e669ac1 PH |
91 | if ( (strcmpic(malware_regex,US"true") == 0) || |
92 | (Ustrcmp(malware_regex,"*") == 0) || | |
8523533c TK |
93 | (Ustrcmp(malware_regex,"1") == 0) ) { |
94 | malware_regex = malware_regex_default; | |
95 | }; | |
96 | } | |
97 | else { | |
98 | /* empty means "don't match anything" */ | |
99 | return FAIL; | |
100 | }; | |
101 | ||
ee873c8c TK |
102 | /* Reset sep that is set by previous string_nextinlist() call */ |
103 | sep = 0; | |
104 | ||
8523533c TK |
105 | /* compile the regex, see if it works */ |
106 | re = pcre_compile(CS malware_regex, PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
107 | if (re == NULL) { | |
108 | log_write(0, LOG_MAIN|LOG_PANIC, | |
109 | "malware acl condition: regular expression error in '%s': %s at offset %d", malware_regex, rerror, roffset); | |
110 | return DEFER; | |
111 | }; | |
112 | ||
113 | /* if av_scanner starts with a dollar, expand it first */ | |
114 | if (*av_scanner == '$') { | |
115 | av_scanner_work = expand_string(av_scanner); | |
116 | if (av_scanner_work == NULL) { | |
117 | log_write(0, LOG_MAIN|LOG_PANIC, | |
118 | "malware acl condition: av_scanner starts with $, but expansion failed: %s", expand_string_message); | |
119 | return DEFER; | |
120 | } | |
121 | else { | |
122 | debug_printf("Expanded av_scanner global: %s\n", av_scanner_work); | |
123 | /* disable result caching in this case */ | |
124 | malware_name = NULL; | |
125 | malware_ok = 0; | |
126 | }; | |
127 | } | |
128 | ||
129 | /* Do not scan twice. */ | |
130 | if (malware_ok == 0) { | |
131 | ||
132 | /* find the scanner type from the av_scanner option */ | |
133 | if ((scanner_name = string_nextinlist(&av_scanner_work, &sep, | |
134 | scanner_name_buffer, | |
135 | sizeof(scanner_name_buffer))) == NULL) { | |
136 | /* no scanner given */ | |
137 | log_write(0, LOG_MAIN|LOG_PANIC, | |
138 | "malware acl condition: av_scanner configuration variable is empty"); | |
139 | return DEFER; | |
140 | }; | |
8e669ac1 | 141 | |
384152a6 TK |
142 | /* "drweb" scanner type ----------------------------------------------- */ |
143 | /* v0.1 - added support for tcp sockets */ | |
144 | /* v0.0 - initial release -- support for unix sockets */ | |
145 | if (strcmpic(scanner_name,US"drweb") == 0) { | |
146 | uschar *drweb_options; | |
147 | uschar drweb_options_buffer[1024]; | |
148 | uschar drweb_options_default[] = "/usr/local/drweb/run/drwebd.sock"; | |
149 | struct sockaddr_un server; | |
150 | int sock, result, ovector[30]; | |
151 | unsigned int port, fsize; | |
152 | uschar tmpbuf[1024], *drweb_fbuf; | |
153 | uschar scanrequest[1024]; | |
154 | uschar drweb_match_string[128]; | |
155 | int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd, | |
156 | drweb_vnum, drweb_slen, drweb_fin = 0x0000; | |
157 | unsigned long bread; | |
158 | uschar hostname[256]; | |
159 | struct hostent *he; | |
160 | struct in_addr in; | |
161 | pcre *drweb_re; | |
162 | ||
163 | if ((drweb_options = string_nextinlist(&av_scanner_work, &sep, | |
164 | drweb_options_buffer, sizeof(drweb_options_buffer))) == NULL) { | |
165 | /* no options supplied, use default options */ | |
166 | drweb_options = drweb_options_default; | |
167 | }; | |
168 | ||
169 | if (*drweb_options != '/') { | |
170 | ||
171 | /* extract host and port part */ | |
172 | if( sscanf(CS drweb_options, "%s %u", hostname, &port) != 2 ) { | |
173 | log_write(0, LOG_MAIN|LOG_PANIC, | |
174 | "malware acl condition: drweb: invalid socket '%s'", drweb_options); | |
175 | return DEFER; | |
176 | } | |
177 | ||
178 | /* Lookup the host */ | |
179 | if((he = gethostbyname(CS hostname)) == 0) { | |
180 | log_write(0, LOG_MAIN|LOG_PANIC, | |
181 | "malware acl condition: drweb: failed to lookup host '%s'", hostname); | |
182 | return DEFER; | |
183 | } | |
184 | ||
185 | in = *(struct in_addr *) he->h_addr_list[0]; | |
186 | ||
187 | /* Open the drwebd TCP socket */ | |
188 | if ( (sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) { | |
189 | log_write(0, LOG_MAIN|LOG_PANIC, | |
190 | "malware acl condition: drweb: unable to acquire socket (%s)", | |
191 | strerror(errno)); | |
192 | return DEFER; | |
193 | } | |
194 | ||
195 | if (ip_connect(sock, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) { | |
f1e894f3 | 196 | (void)close(sock); |
384152a6 TK |
197 | log_write(0, LOG_MAIN|LOG_PANIC, |
198 | "malware acl condition: drweb: connection to %s, port %u failed (%s)", | |
199 | inet_ntoa(in), port, strerror(errno)); | |
200 | return DEFER; | |
201 | } | |
202 | ||
203 | /* prepare variables */ | |
204 | drweb_cmd = htonl(DRWEBD_SCAN_CMD); | |
205 | drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL); | |
b07e6aa3 | 206 | (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml", |
384152a6 TK |
207 | spool_directory, message_id, message_id); |
208 | ||
209 | /* calc file size */ | |
210 | drweb_fd = open(CS scanrequest, O_RDONLY); | |
211 | if (drweb_fd == -1) { | |
f1e894f3 | 212 | (void)close(sock); |
384152a6 TK |
213 | log_write(0, LOG_MAIN|LOG_PANIC, |
214 | "malware acl condition: drweb: can't open spool file %s: %s", | |
215 | scanrequest, strerror(errno)); | |
216 | return DEFER; | |
217 | } | |
218 | fsize = lseek(drweb_fd, 0, SEEK_END); | |
219 | if (fsize == -1) { | |
f1e894f3 PH |
220 | (void)close(sock); |
221 | (void)close(drweb_fd); | |
384152a6 TK |
222 | log_write(0, LOG_MAIN|LOG_PANIC, |
223 | "malware acl condition: drweb: can't seek spool file %s: %s", | |
224 | scanrequest, strerror(errno)); | |
225 | return DEFER; | |
226 | } | |
227 | drweb_slen = htonl(fsize); | |
228 | lseek(drweb_fd, 0, SEEK_SET); | |
229 | ||
230 | /* send scan request */ | |
231 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
232 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
233 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) || | |
234 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0)) { | |
f1e894f3 PH |
235 | (void)close(sock); |
236 | (void)close(drweb_fd); | |
384152a6 TK |
237 | log_write(0, LOG_MAIN|LOG_PANIC, |
238 | "malware acl condition: drweb: unable to send commands to socket (%s)", drweb_options); | |
239 | return DEFER; | |
240 | } | |
241 | ||
242 | drweb_fbuf = (uschar *) malloc (fsize); | |
243 | if (!drweb_fbuf) { | |
f1e894f3 PH |
244 | (void)close(sock); |
245 | (void)close(drweb_fd); | |
384152a6 TK |
246 | log_write(0, LOG_MAIN|LOG_PANIC, |
247 | "malware acl condition: drweb: unable to allocate memory %u for file (%s)", | |
248 | fsize, scanrequest); | |
249 | return DEFER; | |
250 | } | |
251 | ||
252 | result = read (drweb_fd, drweb_fbuf, fsize); | |
253 | if (result == -1) { | |
f1e894f3 PH |
254 | (void)close(sock); |
255 | (void)close(drweb_fd); | |
384152a6 TK |
256 | free(drweb_fbuf); |
257 | log_write(0, LOG_MAIN|LOG_PANIC, | |
258 | "malware acl condition: drweb: can't read spool file %s: %s", | |
259 | scanrequest, strerror(errno)); | |
260 | return DEFER; | |
261 | } | |
f1e894f3 | 262 | (void)close(drweb_fd); |
384152a6 TK |
263 | |
264 | /* send file body to socket */ | |
265 | if (send(sock, drweb_fbuf, fsize, 0) < 0) { | |
f1e894f3 | 266 | (void)close(sock); |
384152a6 TK |
267 | free(drweb_fbuf); |
268 | log_write(0, LOG_MAIN|LOG_PANIC, | |
269 | "malware acl condition: drweb: unable to send file body to socket (%s)", drweb_options); | |
270 | return DEFER; | |
271 | } | |
f1e894f3 | 272 | (void)close(drweb_fd); |
384152a6 TK |
273 | } |
274 | else { | |
275 | /* open the drwebd UNIX socket */ | |
276 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
277 | if (sock < 0) { | |
278 | log_write(0, LOG_MAIN|LOG_PANIC, | |
279 | "malware acl condition: drweb: can't open UNIX socket"); | |
280 | return DEFER; | |
281 | } | |
282 | server.sun_family = AF_UNIX; | |
283 | Ustrcpy(server.sun_path, drweb_options); | |
284 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 285 | (void)close(sock); |
384152a6 TK |
286 | log_write(0, LOG_MAIN|LOG_PANIC, |
287 | "malware acl condition: drweb: unable to connect to socket (%s). errno=%d", drweb_options, errno); | |
288 | return DEFER; | |
289 | } | |
290 | ||
291 | /* prepare variables */ | |
292 | drweb_cmd = htonl(DRWEBD_SCAN_CMD); | |
293 | drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL); | |
b07e6aa3 | 294 | (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml", spool_directory, message_id, message_id); |
384152a6 TK |
295 | drweb_slen = htonl(Ustrlen(scanrequest)); |
296 | ||
297 | /* send scan request */ | |
298 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
299 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
300 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) || | |
301 | (send(sock, scanrequest, Ustrlen(scanrequest), 0) < 0) || | |
302 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0)) { | |
f1e894f3 | 303 | (void)close(sock); |
384152a6 TK |
304 | log_write(0, LOG_MAIN|LOG_PANIC, |
305 | "malware acl condition: drweb: unable to send commands to socket (%s)", drweb_options); | |
306 | return DEFER; | |
307 | } | |
308 | } | |
309 | ||
310 | /* wait for result */ | |
311 | if ((bread = recv(sock, &drweb_rc, sizeof(drweb_rc), 0) != sizeof(drweb_rc))) { | |
f1e894f3 | 312 | (void)close(sock); |
384152a6 TK |
313 | log_write(0, LOG_MAIN|LOG_PANIC, |
314 | "malware acl condition: drweb: unable to read return code"); | |
315 | return DEFER; | |
316 | } | |
317 | drweb_rc = ntohl(drweb_rc); | |
318 | ||
319 | if ((bread = recv(sock, &drweb_vnum, sizeof(drweb_vnum), 0) != sizeof(drweb_vnum))) { | |
f1e894f3 | 320 | (void)close(sock); |
384152a6 TK |
321 | log_write(0, LOG_MAIN|LOG_PANIC, |
322 | "malware acl condition: drweb: unable to read the number of viruses"); | |
323 | return DEFER; | |
324 | } | |
325 | drweb_vnum = ntohl(drweb_vnum); | |
326 | ||
327 | /* "virus(es) found" if virus number is > 0 */ | |
328 | if (drweb_vnum) | |
329 | { | |
330 | int i; | |
331 | uschar pre_malware_nb[256]; | |
332 | ||
333 | malware_name = malware_name_buffer; | |
334 | ||
335 | /* setup default virus name */ | |
336 | Ustrcpy(malware_name_buffer,"unknown"); | |
337 | ||
338 | /* read and concatenate virus names into one string */ | |
339 | for (i=0;i<drweb_vnum;i++) | |
340 | { | |
341 | /* read the size of report */ | |
342 | if ((bread = recv(sock, &drweb_slen, sizeof(drweb_slen), 0) != sizeof(drweb_slen))) { | |
f1e894f3 | 343 | (void)close(sock); |
384152a6 TK |
344 | log_write(0, LOG_MAIN|LOG_PANIC, |
345 | "malware acl condition: drweb: cannot read report size"); | |
346 | return DEFER; | |
347 | }; | |
348 | drweb_slen = ntohl(drweb_slen); | |
349 | ||
350 | /* read report body */ | |
351 | if ((bread = recv(sock, tmpbuf, drweb_slen, 0)) != drweb_slen) { | |
f1e894f3 | 352 | (void)close(sock); |
384152a6 TK |
353 | log_write(0, LOG_MAIN|LOG_PANIC, |
354 | "malware acl condition: drweb: cannot read report string"); | |
355 | return DEFER; | |
356 | }; | |
357 | tmpbuf[drweb_slen] = '\0'; | |
358 | ||
359 | /* set up match regex, depends on retcode */ | |
360 | Ustrcpy(drweb_match_string, "infected\\swith\\s*(.+?)$"); | |
361 | ||
362 | drweb_re = pcre_compile( CS drweb_match_string, | |
363 | PCRE_COPT, | |
364 | (const char **)&rerror, | |
365 | &roffset, | |
366 | NULL ); | |
367 | ||
368 | /* try matcher on the line, grab substring */ | |
369 | result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, ovector, 30); | |
370 | if (result >= 2) { | |
371 | pcre_copy_substring(CS tmpbuf, ovector, result, 1, CS pre_malware_nb, 255); | |
372 | } | |
373 | /* the first name we just copy to malware_name */ | |
374 | if (i==0) | |
375 | Ustrcpy(CS malware_name_buffer, CS pre_malware_nb); | |
376 | else { | |
377 | /* concatenate each new virus name to previous */ | |
378 | int slen = Ustrlen(malware_name_buffer); | |
379 | if (slen < (slen+Ustrlen(pre_malware_nb))) { | |
380 | Ustrcat(malware_name_buffer, "/"); | |
381 | Ustrcat(malware_name_buffer, pre_malware_nb); | |
382 | } | |
383 | } | |
384 | } | |
385 | } | |
386 | else { | |
387 | char *drweb_s = NULL; | |
388 | ||
389 | if (drweb_rc & DERR_READ_ERR) drweb_s = "read error"; | |
390 | if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory"; | |
391 | if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout"; | |
392 | if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command"; | |
393 | /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED. | |
394 | * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM, | |
395 | * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR | |
396 | * and others are ignored */ | |
397 | if (drweb_s) { | |
398 | log_write(0, LOG_MAIN|LOG_PANIC, | |
399 | "malware acl condition: drweb: drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s); | |
f1e894f3 | 400 | (void)close(sock); |
384152a6 TK |
401 | return DEFER; |
402 | } | |
403 | /* no virus found */ | |
404 | malware_name = NULL; | |
405 | }; | |
f1e894f3 | 406 | (void)close(sock); |
384152a6 TK |
407 | } |
408 | /* ----------------------------------------------------------------------- */ | |
8523533c TK |
409 | else if (strcmpic(scanner_name,US"aveserver") == 0) { |
410 | uschar *kav_options; | |
411 | uschar kav_options_buffer[1024]; | |
412 | uschar kav_options_default[] = "/var/run/aveserver"; | |
413 | uschar buf[32768]; | |
8523533c TK |
414 | struct sockaddr_un server; |
415 | int sock; | |
7e274b4b | 416 | int result; |
8e669ac1 | 417 | |
8523533c TK |
418 | if ((kav_options = string_nextinlist(&av_scanner_work, &sep, |
419 | kav_options_buffer, | |
420 | sizeof(kav_options_buffer))) == NULL) { | |
421 | /* no options supplied, use default options */ | |
422 | kav_options = kav_options_default; | |
423 | }; | |
8e669ac1 | 424 | |
8523533c TK |
425 | /* open the aveserver socket */ |
426 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
427 | if (sock < 0) { | |
428 | log_write(0, LOG_MAIN|LOG_PANIC, | |
429 | "malware acl condition: can't open UNIX socket."); | |
8e669ac1 | 430 | return DEFER; |
8523533c TK |
431 | } |
432 | server.sun_family = AF_UNIX; | |
433 | Ustrcpy(server.sun_path, kav_options); | |
434 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 435 | (void)close(sock); |
8523533c TK |
436 | log_write(0, LOG_MAIN|LOG_PANIC, |
437 | "malware acl condition: unable to connect to aveserver UNIX socket (%s). errno=%d", kav_options, errno); | |
438 | return DEFER; | |
439 | } | |
8e669ac1 | 440 | |
8523533c TK |
441 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ |
442 | recv_line(sock, buf, 32768); | |
443 | ||
444 | if (buf[0] != '2') { | |
445 | /* aveserver is having problems */ | |
f1e894f3 | 446 | (void)close(sock); |
8523533c TK |
447 | log_write(0, LOG_MAIN|LOG_PANIC, |
448 | "malware acl condition: aveserver is unavailable (Responded: %s).", ((buf[0] != 0) ? buf : (uschar *)"nothing") ); | |
449 | return DEFER; | |
450 | }; | |
8e669ac1 | 451 | |
8523533c | 452 | /* prepare our command */ |
b07e6aa3 | 453 | (void)string_format(buf, 32768, "SCAN bPQRSTUW %s/scan/%s/%s.eml\r\n", spool_directory, message_id, message_id); |
8e669ac1 | 454 | |
8523533c TK |
455 | /* and send it */ |
456 | if (send(sock, buf, Ustrlen(buf), 0) < 0) { | |
f1e894f3 | 457 | (void)close(sock); |
8523533c TK |
458 | log_write(0, LOG_MAIN|LOG_PANIC, |
459 | "malware acl condition: unable to write to aveserver UNIX socket (%s)", kav_options); | |
460 | return DEFER; | |
461 | } | |
8e669ac1 | 462 | |
8523533c | 463 | malware_name = NULL; |
7e274b4b | 464 | result = 0; |
8523533c TK |
465 | /* read response lines, find malware name and final response */ |
466 | while (recv_line(sock, buf, 32768) > 0) { | |
467 | debug_printf("aveserver: %s\n", buf); | |
7e274b4b TK |
468 | if (buf[0] == '2') { |
469 | break; | |
470 | } else if (buf[0] == '5') { | |
471 | /* aveserver is having problems */ | |
472 | log_write(0, LOG_MAIN|LOG_PANIC, | |
473 | "malware acl condition: unable to scan file %s/scan/%s/%s.eml (Responded: %s).", | |
474 | spool_directory, message_id, message_id, buf); | |
475 | result = DEFER; | |
476 | break; | |
477 | } else if (Ustrncmp(buf,"322",3) == 0) { | |
8523533c TK |
478 | uschar *p = Ustrchr(&buf[4],' '); |
479 | *p = '\0'; | |
480 | Ustrcpy(malware_name_buffer,&buf[4]); | |
481 | malware_name = malware_name_buffer; | |
7e274b4b TK |
482 | }; |
483 | } | |
484 | ||
485 | /* prepare our command */ | |
b07e6aa3 | 486 | (void)string_format(buf, 32768, "quit\r\n"); |
7e274b4b TK |
487 | |
488 | /* and send it */ | |
489 | if (send(sock, buf, Ustrlen(buf), 0) < 0) { | |
f1e894f3 | 490 | (void)close(sock); |
7e274b4b TK |
491 | log_write(0, LOG_MAIN|LOG_PANIC, |
492 | "malware acl condition: unable to write to aveserver UNIX socket (%s)", kav_options); | |
493 | return DEFER; | |
8523533c TK |
494 | } |
495 | ||
7e274b4b TK |
496 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ |
497 | recv_line(sock, buf, 32768); | |
498 | ||
499 | if (buf[0] != '2') { | |
500 | /* aveserver is having problems */ | |
f1e894f3 | 501 | (void)close(sock); |
7e274b4b TK |
502 | log_write(0, LOG_MAIN|LOG_PANIC, |
503 | "malware acl condition: unable to quit aveserver dialogue (Responded: %s).", ((buf[0] != 0) ? buf : (uschar *)"nothing") ); | |
504 | return DEFER; | |
505 | }; | |
506 | ||
f1e894f3 | 507 | (void)close(sock); |
7e274b4b TK |
508 | |
509 | if (result == DEFER) return DEFER; | |
8523533c TK |
510 | } |
511 | /* "fsecure" scanner type ------------------------------------------------- */ | |
512 | else if (strcmpic(scanner_name,US"fsecure") == 0) { | |
513 | uschar *fsecure_options; | |
514 | uschar fsecure_options_buffer[1024]; | |
515 | uschar fsecure_options_default[] = "/var/run/.fsav"; | |
516 | struct sockaddr_un server; | |
517 | int sock, i, j, bread = 0; | |
518 | uschar file_name[1024]; | |
519 | uschar av_buffer[1024]; | |
520 | pcre *fs_inf; | |
f7b63901 PH |
521 | static uschar *cmdoptions[] = { US"CONFIGURE\tARCHIVE\t1\n", |
522 | US"CONFIGURE\tTIMEOUT\t0\n", | |
523 | US"CONFIGURE\tMAXARCH\t5\n", | |
524 | US"CONFIGURE\tMIME\t1\n" }; | |
8e669ac1 | 525 | |
8523533c TK |
526 | malware_name = NULL; |
527 | if ((fsecure_options = string_nextinlist(&av_scanner_work, &sep, | |
528 | fsecure_options_buffer, | |
8e669ac1 | 529 | sizeof(fsecure_options_buffer))) == NULL) { |
8523533c TK |
530 | /* no options supplied, use default options */ |
531 | fsecure_options = fsecure_options_default; | |
532 | }; | |
8e669ac1 | 533 | |
8523533c TK |
534 | /* open the fsecure socket */ |
535 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
536 | if (sock < 0) { | |
537 | log_write(0, LOG_MAIN|LOG_PANIC, | |
538 | "malware acl condition: unable to open fsecure socket %s (%s)", | |
539 | fsecure_options, strerror(errno)); | |
540 | return DEFER; | |
541 | } | |
542 | server.sun_family = AF_UNIX; | |
543 | Ustrcpy(server.sun_path, fsecure_options); | |
544 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 545 | (void)close(sock); |
8523533c TK |
546 | log_write(0, LOG_MAIN|LOG_PANIC, |
547 | "malware acl condition: unable to connect to fsecure socket %s (%s)", | |
548 | fsecure_options, strerror(errno)); | |
549 | return DEFER; | |
550 | } | |
8e669ac1 | 551 | |
8523533c TK |
552 | /* pass options */ |
553 | memset(av_buffer, 0, sizeof(av_buffer)); | |
554 | for (i=0; i != 4; i++) { | |
555 | /* debug_printf("send option \"%s\"",cmdoptions[i]); */ | |
556 | if (write(sock, cmdoptions[i], Ustrlen(cmdoptions[i])) < 0) { | |
f1e894f3 | 557 | (void)close(sock); |
8523533c TK |
558 | log_write(0, LOG_MAIN|LOG_PANIC, |
559 | "malware acl condition: unable to write fsecure option %d to %s (%s)", | |
560 | i, fsecure_options, strerror(errno)); | |
8e669ac1 | 561 | return DEFER; |
8523533c | 562 | }; |
8e669ac1 | 563 | |
a9ccd69a | 564 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT); |
8523533c TK |
565 | if (bread >0) av_buffer[bread]='\0'; |
566 | if (bread < 0) { | |
f1e894f3 | 567 | (void)close(sock); |
8523533c TK |
568 | log_write(0, LOG_MAIN|LOG_PANIC, |
569 | "malware acl condition: unable to read fsecure answer %d (%s)", i, strerror(errno)); | |
570 | return DEFER; | |
571 | }; | |
572 | for (j=0;j<bread;j++) if((av_buffer[j]=='\r')||(av_buffer[j]=='\n')) av_buffer[j] ='@'; | |
573 | /* debug_printf("read answer %d read=%d \"%s\"\n", i, bread, av_buffer ); */ | |
574 | /* while (Ustrstr(av_buffer, "OK\tServer configured.@") == NULL); */ | |
575 | }; | |
8e669ac1 | 576 | |
8523533c | 577 | /* pass the mailfile to fsecure */ |
b07e6aa3 | 578 | (void)string_format(file_name,1024,"SCAN\t%s/scan/%s/%s.eml\n", spool_directory, message_id, message_id); |
8523533c TK |
579 | /* debug_printf("send scan %s",file_name); */ |
580 | if (write(sock, file_name, Ustrlen(file_name)) < 0) { | |
f1e894f3 | 581 | (void)close(sock); |
8523533c TK |
582 | log_write(0, LOG_MAIN|LOG_PANIC, |
583 | "malware acl condition: unable to write fsecure scan to %s (%s)", | |
584 | fsecure_options, strerror(errno)); | |
585 | return DEFER; | |
586 | }; | |
8e669ac1 | 587 | |
8523533c TK |
588 | /* set up match */ |
589 | /* todo also SUSPICION\t */ | |
590 | fs_inf = pcre_compile("\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$", PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
8e669ac1 | 591 | |
8523533c TK |
592 | /* read report, linewise */ |
593 | do { | |
594 | int ovector[30]; | |
595 | i = 0; | |
596 | memset(av_buffer, 0, sizeof(av_buffer)); | |
597 | do { | |
a9ccd69a | 598 | bread=ip_recv(sock, &av_buffer[i], 1, MALWARE_TIMEOUT); |
8523533c | 599 | if (bread < 0) { |
f1e894f3 | 600 | (void)close(sock); |
8523533c TK |
601 | log_write(0, LOG_MAIN|LOG_PANIC, |
602 | "malware acl condition: unable to read fsecure result (%s)", strerror(errno)); | |
603 | return DEFER; | |
604 | }; | |
605 | i++; | |
606 | } | |
607 | while ((i < sizeof(av_buffer)-1 ) && (av_buffer[i-1] != '\n')); | |
608 | av_buffer[i-1] = '\0'; | |
609 | /* debug_printf("got line \"%s\"\n",av_buffer); */ | |
8e669ac1 | 610 | |
8523533c TK |
611 | /* Really search for virus again? */ |
612 | if (malware_name == NULL) { | |
613 | /* try matcher on the line, grab substring */ | |
614 | i = pcre_exec(fs_inf, NULL, CS av_buffer, Ustrlen(av_buffer), 0, 0, ovector, 30); | |
615 | if (i >= 2) { | |
616 | /* Got it */ | |
617 | pcre_copy_substring(CS av_buffer, ovector, i, 1, CS malware_name_buffer, 255); | |
618 | malware_name = malware_name_buffer; | |
619 | }; | |
620 | }; | |
621 | } | |
622 | while (Ustrstr(av_buffer, "OK\tScan ok.") == NULL); | |
f1e894f3 | 623 | (void)close(sock); |
8523533c TK |
624 | } |
625 | /* ----------------------------------------------------------------------- */ | |
626 | ||
627 | /* "kavdaemon" scanner type ------------------------------------------------ */ | |
628 | else if (strcmpic(scanner_name,US"kavdaemon") == 0) { | |
629 | uschar *kav_options; | |
630 | uschar kav_options_buffer[1024]; | |
631 | uschar kav_options_default[] = "/var/run/AvpCtl"; | |
632 | struct sockaddr_un server; | |
633 | int sock; | |
634 | time_t t; | |
635 | uschar tmpbuf[1024]; | |
636 | uschar scanrequest[1024]; | |
637 | uschar kav_match_string[128]; | |
638 | int kav_rc; | |
639 | unsigned long kav_reportlen, bread; | |
640 | pcre *kav_re; | |
8e669ac1 | 641 | |
8523533c TK |
642 | if ((kav_options = string_nextinlist(&av_scanner_work, &sep, |
643 | kav_options_buffer, | |
644 | sizeof(kav_options_buffer))) == NULL) { | |
645 | /* no options supplied, use default options */ | |
646 | kav_options = kav_options_default; | |
647 | }; | |
8e669ac1 | 648 | |
8523533c TK |
649 | /* open the kavdaemon socket */ |
650 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
651 | if (sock < 0) { | |
652 | log_write(0, LOG_MAIN|LOG_PANIC, | |
653 | "malware acl condition: can't open UNIX socket."); | |
8e669ac1 | 654 | return DEFER; |
8523533c TK |
655 | } |
656 | server.sun_family = AF_UNIX; | |
657 | Ustrcpy(server.sun_path, kav_options); | |
658 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 659 | (void)close(sock); |
8523533c TK |
660 | log_write(0, LOG_MAIN|LOG_PANIC, |
661 | "malware acl condition: unable to connect to kavdaemon UNIX socket (%s). errno=%d", kav_options, errno); | |
662 | return DEFER; | |
663 | } | |
8e669ac1 | 664 | |
8523533c TK |
665 | /* get current date and time, build scan request */ |
666 | time(&t); | |
667 | strftime(CS tmpbuf, sizeof(tmpbuf), "<0>%d %b %H:%M:%S:%%s/scan/%%s", localtime(&t)); | |
b07e6aa3 | 668 | (void)string_format(scanrequest, 1024,CS tmpbuf, spool_directory, message_id); |
8e669ac1 | 669 | |
8523533c TK |
670 | /* send scan request */ |
671 | if (send(sock, scanrequest, Ustrlen(scanrequest)+1, 0) < 0) { | |
f1e894f3 | 672 | (void)close(sock); |
8523533c TK |
673 | log_write(0, LOG_MAIN|LOG_PANIC, |
674 | "malware acl condition: unable to write to kavdaemon UNIX socket (%s)", kav_options); | |
675 | return DEFER; | |
676 | } | |
8e669ac1 | 677 | |
8523533c TK |
678 | /* wait for result */ |
679 | if ((bread = recv(sock, tmpbuf, 2, 0) != 2)) { | |
f1e894f3 | 680 | (void)close(sock); |
8523533c TK |
681 | log_write(0, LOG_MAIN|LOG_PANIC, |
682 | "malware acl condition: unable to read 2 bytes from kavdaemon socket."); | |
683 | return DEFER; | |
684 | } | |
8e669ac1 | 685 | |
8523533c TK |
686 | /* get errorcode from one nibble */ |
687 | if (test_byte_order() == LITTLE_MY_ENDIAN) { | |
688 | kav_rc = tmpbuf[0] & 0x0F; | |
689 | } | |
690 | else { | |
691 | kav_rc = tmpbuf[1] & 0x0F; | |
692 | }; | |
8e669ac1 | 693 | |
8523533c TK |
694 | /* improper kavdaemon configuration */ |
695 | if ( (kav_rc == 5) || (kav_rc == 6) ) { | |
f1e894f3 | 696 | (void)close(sock); |
8523533c TK |
697 | log_write(0, LOG_MAIN|LOG_PANIC, |
698 | "malware acl condition: please reconfigure kavdaemon to NOT disinfect or remove infected files."); | |
699 | return DEFER; | |
700 | }; | |
8e669ac1 | 701 | |
8523533c | 702 | if (kav_rc == 1) { |
f1e894f3 | 703 | (void)close(sock); |
8523533c TK |
704 | log_write(0, LOG_MAIN|LOG_PANIC, |
705 | "malware acl condition: kavdaemon reported 'scanning not completed' (code 1)."); | |
706 | return DEFER; | |
707 | }; | |
8e669ac1 | 708 | |
8523533c | 709 | if (kav_rc == 7) { |
f1e894f3 | 710 | (void)close(sock); |
8523533c TK |
711 | log_write(0, LOG_MAIN|LOG_PANIC, |
712 | "malware acl condition: kavdaemon reported 'kavdaemon damaged' (code 7)."); | |
713 | return DEFER; | |
714 | }; | |
8e669ac1 | 715 | |
8523533c TK |
716 | /* code 8 is not handled, since it is ambigous. It appears mostly on |
717 | bounces where part of a file has been cut off */ | |
8e669ac1 | 718 | |
8523533c TK |
719 | /* "virus found" return codes (2-4) */ |
720 | if ((kav_rc > 1) && (kav_rc < 5)) { | |
721 | int report_flag = 0; | |
8e669ac1 | 722 | |
8523533c TK |
723 | /* setup default virus name */ |
724 | Ustrcpy(malware_name_buffer,"unknown"); | |
725 | malware_name = malware_name_buffer; | |
8e669ac1 | 726 | |
8523533c TK |
727 | if (test_byte_order() == LITTLE_MY_ENDIAN) { |
728 | report_flag = tmpbuf[1]; | |
729 | } | |
730 | else { | |
731 | report_flag = tmpbuf[0]; | |
732 | }; | |
8e669ac1 | 733 | |
8523533c TK |
734 | /* read the report, if available */ |
735 | if( report_flag == 1 ) { | |
736 | /* read report size */ | |
737 | if ((bread = recv(sock, &kav_reportlen, 4, 0)) != 4) { | |
f1e894f3 | 738 | (void)close(sock); |
8523533c TK |
739 | log_write(0, LOG_MAIN|LOG_PANIC, |
740 | "malware acl condition: cannot read report size from kavdaemon"); | |
741 | return DEFER; | |
742 | }; | |
8e669ac1 | 743 | |
8523533c TK |
744 | /* it's possible that avp returns av_buffer[1] == 1 but the |
745 | reportsize is 0 (!?) */ | |
746 | if (kav_reportlen > 0) { | |
747 | /* set up match regex, depends on retcode */ | |
748 | if( kav_rc == 3 ) | |
749 | Ustrcpy(kav_match_string, "suspicion:\\s*(.+?)\\s*$"); | |
750 | else | |
751 | Ustrcpy(kav_match_string, "infected:\\s*(.+?)\\s*$"); | |
8e669ac1 | 752 | |
8523533c TK |
753 | kav_re = pcre_compile( CS kav_match_string, |
754 | PCRE_COPT, | |
755 | (const char **)&rerror, | |
756 | &roffset, | |
757 | NULL ); | |
8e669ac1 PH |
758 | |
759 | /* read report, linewise */ | |
8523533c TK |
760 | while (kav_reportlen > 0) { |
761 | int result = 0; | |
762 | int ovector[30]; | |
8e669ac1 | 763 | |
8523533c TK |
764 | bread = 0; |
765 | while ( recv(sock, &tmpbuf[bread], 1, 0) == 1 ) { | |
766 | kav_reportlen--; | |
767 | if ( (tmpbuf[bread] == '\n') || (bread > 1021) ) break; | |
768 | bread++; | |
769 | }; | |
770 | bread++; | |
771 | tmpbuf[bread] = '\0'; | |
8e669ac1 | 772 | |
8523533c TK |
773 | /* try matcher on the line, grab substring */ |
774 | result = pcre_exec(kav_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, ovector, 30); | |
775 | if (result >= 2) { | |
776 | pcre_copy_substring(CS tmpbuf, ovector, result, 1, CS malware_name_buffer, 255); | |
777 | break; | |
778 | }; | |
779 | }; | |
780 | }; | |
781 | }; | |
782 | } | |
783 | else { | |
784 | /* no virus found */ | |
785 | malware_name = NULL; | |
786 | }; | |
8e669ac1 | 787 | |
f1e894f3 | 788 | (void)close(sock); |
8523533c TK |
789 | } |
790 | /* ----------------------------------------------------------------------- */ | |
8e669ac1 PH |
791 | |
792 | ||
8523533c TK |
793 | /* "cmdline" scanner type ------------------------------------------------ */ |
794 | else if (strcmpic(scanner_name,US"cmdline") == 0) { | |
795 | uschar *cmdline_scanner; | |
796 | uschar cmdline_scanner_buffer[1024]; | |
797 | uschar *cmdline_trigger; | |
798 | uschar cmdline_trigger_buffer[1024]; | |
799 | const pcre *cmdline_trigger_re; | |
800 | uschar *cmdline_regex; | |
801 | uschar cmdline_regex_buffer[1024]; | |
802 | const pcre *cmdline_regex_re; | |
803 | uschar file_name[1024]; | |
804 | uschar commandline[1024]; | |
805 | void (*eximsigchld)(int); | |
806 | void (*eximsigpipe)(int); | |
807 | FILE *scanner_out = NULL; | |
808 | FILE *scanner_record = NULL; | |
809 | uschar linebuffer[32767]; | |
810 | int trigger = 0; | |
811 | int result; | |
812 | int ovector[30]; | |
8e669ac1 | 813 | |
8523533c TK |
814 | /* find scanner command line */ |
815 | if ((cmdline_scanner = string_nextinlist(&av_scanner_work, &sep, | |
816 | cmdline_scanner_buffer, | |
817 | sizeof(cmdline_scanner_buffer))) == NULL) { | |
818 | /* no command line supplied */ | |
819 | log_write(0, LOG_MAIN|LOG_PANIC, | |
820 | "malware acl condition: missing commandline specification for cmdline scanner type."); | |
8e669ac1 | 821 | return DEFER; |
8523533c | 822 | }; |
8e669ac1 | 823 | |
8523533c TK |
824 | /* find scanner output trigger */ |
825 | if ((cmdline_trigger = string_nextinlist(&av_scanner_work, &sep, | |
826 | cmdline_trigger_buffer, | |
827 | sizeof(cmdline_trigger_buffer))) == NULL) { | |
828 | /* no trigger regex supplied */ | |
829 | log_write(0, LOG_MAIN|LOG_PANIC, | |
830 | "malware acl condition: missing trigger specification for cmdline scanner type."); | |
8e669ac1 | 831 | return DEFER; |
8523533c | 832 | }; |
8e669ac1 | 833 | |
8523533c TK |
834 | /* precompile trigger regex */ |
835 | cmdline_trigger_re = pcre_compile(CS cmdline_trigger, PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
836 | if (cmdline_trigger_re == NULL) { | |
837 | log_write(0, LOG_MAIN|LOG_PANIC, | |
838 | "malware acl condition: regular expression error in '%s': %s at offset %d", cmdline_trigger_re, rerror, roffset); | |
839 | return DEFER; | |
840 | }; | |
8e669ac1 | 841 | |
8523533c TK |
842 | /* find scanner name regex */ |
843 | if ((cmdline_regex = string_nextinlist(&av_scanner_work, &sep, | |
844 | cmdline_regex_buffer, | |
845 | sizeof(cmdline_regex_buffer))) == NULL) { | |
846 | /* no name regex supplied */ | |
847 | log_write(0, LOG_MAIN|LOG_PANIC, | |
848 | "malware acl condition: missing virus name regex specification for cmdline scanner type."); | |
8e669ac1 | 849 | return DEFER; |
8523533c | 850 | }; |
8e669ac1 | 851 | |
8523533c TK |
852 | /* precompile name regex */ |
853 | cmdline_regex_re = pcre_compile(CS cmdline_regex, PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
854 | if (cmdline_regex_re == NULL) { | |
855 | log_write(0, LOG_MAIN|LOG_PANIC, | |
856 | "malware acl condition: regular expression error in '%s': %s at offset %d", cmdline_regex_re, rerror, roffset); | |
857 | return DEFER; | |
858 | }; | |
8e669ac1 | 859 | |
8523533c | 860 | /* prepare scanner call */ |
b07e6aa3 PH |
861 | (void)string_format(file_name,1024,"%s/scan/%s", spool_directory, message_id); |
862 | (void)string_format(commandline,1024, CS cmdline_scanner,file_name); | |
8523533c TK |
863 | /* redirect STDERR too */ |
864 | Ustrcat(commandline," 2>&1"); | |
8e669ac1 | 865 | |
8523533c TK |
866 | /* store exims signal handlers */ |
867 | eximsigchld = signal(SIGCHLD,SIG_DFL); | |
868 | eximsigpipe = signal(SIGPIPE,SIG_DFL); | |
8e669ac1 | 869 | |
8523533c TK |
870 | scanner_out = popen(CS commandline,"r"); |
871 | if (scanner_out == NULL) { | |
872 | log_write(0, LOG_MAIN|LOG_PANIC, | |
873 | "malware acl condition: calling cmdline scanner (%s) failed: %s.", commandline, strerror(errno)); | |
874 | signal(SIGCHLD,eximsigchld); | |
875 | signal(SIGPIPE,eximsigpipe); | |
876 | return DEFER; | |
877 | }; | |
8e669ac1 | 878 | |
b07e6aa3 | 879 | (void)string_format(file_name,1024,"%s/scan/%s/%s_scanner_output", spool_directory, message_id, message_id); |
2632889e | 880 | scanner_record = modefopen(file_name,"wb",SPOOL_MODE); |
8e669ac1 | 881 | |
8523533c TK |
882 | if (scanner_record == NULL) { |
883 | log_write(0, LOG_MAIN|LOG_PANIC, | |
884 | "malware acl condition: opening scanner output file (%s) failed: %s.", file_name, strerror(errno)); | |
885 | pclose(scanner_out); | |
886 | signal(SIGCHLD,eximsigchld); | |
887 | signal(SIGPIPE,eximsigpipe); | |
888 | return DEFER; | |
889 | }; | |
8e669ac1 | 890 | |
8523533c TK |
891 | /* look for trigger while recording output */ |
892 | while(fgets(CS linebuffer,32767,scanner_out) != NULL) { | |
893 | if ( Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record) ) { | |
894 | /* short write */ | |
895 | log_write(0, LOG_MAIN|LOG_PANIC, | |
896 | "malware acl condition: short write on scanner output file (%s).", file_name); | |
897 | pclose(scanner_out); | |
898 | signal(SIGCHLD,eximsigchld); | |
899 | signal(SIGPIPE,eximsigpipe); | |
900 | return DEFER; | |
901 | }; | |
902 | /* try trigger match */ | |
903 | if (!trigger && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)) | |
904 | trigger = 1; | |
905 | }; | |
8e669ac1 | 906 | |
f1e894f3 | 907 | (void)fclose(scanner_record); |
8523533c TK |
908 | pclose(scanner_out); |
909 | signal(SIGCHLD,eximsigchld); | |
910 | signal(SIGPIPE,eximsigpipe); | |
8e669ac1 | 911 | |
8523533c TK |
912 | if (trigger) { |
913 | /* setup default virus name */ | |
914 | Ustrcpy(malware_name_buffer,"unknown"); | |
915 | malware_name = malware_name_buffer; | |
8e669ac1 | 916 | |
8523533c | 917 | /* re-open the scanner output file, look for name match */ |
c58b88df | 918 | scanner_record = fopen(CS file_name,"rb"); |
8523533c TK |
919 | while(fgets(CS linebuffer,32767,scanner_record) != NULL) { |
920 | /* try match */ | |
921 | result = pcre_exec(cmdline_regex_re, NULL, CS linebuffer, Ustrlen(linebuffer), 0, 0, ovector, 30); | |
922 | if (result >= 2) { | |
923 | pcre_copy_substring(CS linebuffer, ovector, result, 1, CS malware_name_buffer, 255); | |
924 | }; | |
925 | }; | |
f1e894f3 | 926 | (void)fclose(scanner_record); |
8523533c TK |
927 | } |
928 | else { | |
929 | /* no virus found */ | |
930 | malware_name = NULL; | |
931 | }; | |
932 | } | |
933 | /* ----------------------------------------------------------------------- */ | |
8e669ac1 PH |
934 | |
935 | ||
8523533c TK |
936 | /* "sophie" scanner type ------------------------------------------------- */ |
937 | else if (strcmpic(scanner_name,US"sophie") == 0) { | |
938 | uschar *sophie_options; | |
939 | uschar sophie_options_buffer[1024]; | |
940 | uschar sophie_options_default[] = "/var/run/sophie"; | |
941 | int bread = 0; | |
942 | struct sockaddr_un server; | |
943 | int sock; | |
944 | uschar file_name[1024]; | |
945 | uschar av_buffer[1024]; | |
8e669ac1 | 946 | |
8523533c TK |
947 | if ((sophie_options = string_nextinlist(&av_scanner_work, &sep, |
948 | sophie_options_buffer, | |
949 | sizeof(sophie_options_buffer))) == NULL) { | |
950 | /* no options supplied, use default options */ | |
951 | sophie_options = sophie_options_default; | |
952 | }; | |
8e669ac1 | 953 | |
8523533c TK |
954 | /* open the sophie socket */ |
955 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
956 | if (sock < 0) { | |
957 | log_write(0, LOG_MAIN|LOG_PANIC, | |
958 | "malware acl condition: can't open UNIX socket."); | |
8e669ac1 | 959 | return DEFER; |
8523533c TK |
960 | } |
961 | server.sun_family = AF_UNIX; | |
962 | Ustrcpy(server.sun_path, sophie_options); | |
963 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 964 | (void)close(sock); |
8523533c TK |
965 | log_write(0, LOG_MAIN|LOG_PANIC, |
966 | "malware acl condition: unable to connect to sophie UNIX socket (%s). errno=%d", sophie_options, errno); | |
967 | return DEFER; | |
968 | } | |
8e669ac1 | 969 | |
8523533c | 970 | /* pass the scan directory to sophie */ |
b07e6aa3 | 971 | (void)string_format(file_name,1024,"%s/scan/%s", spool_directory, message_id); |
8523533c | 972 | if (write(sock, file_name, Ustrlen(file_name)) < 0) { |
f1e894f3 | 973 | (void)close(sock); |
8523533c TK |
974 | log_write(0, LOG_MAIN|LOG_PANIC, |
975 | "malware acl condition: unable to write to sophie UNIX socket (%s)", sophie_options); | |
8e669ac1 | 976 | return DEFER; |
8523533c | 977 | }; |
8e669ac1 | 978 | |
f1e894f3 | 979 | (void)write(sock, "\n", 1); |
8e669ac1 | 980 | |
8523533c TK |
981 | /* wait for result */ |
982 | memset(av_buffer, 0, sizeof(av_buffer)); | |
a9ccd69a | 983 | if ((!(bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT)) > 0)) { |
f1e894f3 | 984 | (void)close(sock); |
8523533c TK |
985 | log_write(0, LOG_MAIN|LOG_PANIC, |
986 | "malware acl condition: unable to read from sophie UNIX socket (%s)", sophie_options); | |
987 | return DEFER; | |
988 | }; | |
8e669ac1 | 989 | |
f1e894f3 | 990 | (void)close(sock); |
8e669ac1 | 991 | |
8523533c TK |
992 | /* infected ? */ |
993 | if (av_buffer[0] == '1') { | |
994 | if (Ustrchr(av_buffer, '\n')) *Ustrchr(av_buffer, '\n') = '\0'; | |
995 | Ustrcpy(malware_name_buffer,&av_buffer[2]); | |
996 | malware_name = malware_name_buffer; | |
997 | } | |
998 | else if (!strncmp(CS av_buffer, "-1", 2)) { | |
999 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1000 | "malware acl condition: malware acl condition: sophie reported error"); | |
1001 | return DEFER; | |
1002 | } | |
1003 | else { | |
1004 | /* all ok, no virus */ | |
1005 | malware_name = NULL; | |
1006 | }; | |
1007 | } | |
1008 | /* ----------------------------------------------------------------------- */ | |
8e669ac1 | 1009 | |
8523533c TK |
1010 | |
1011 | /* "clamd" scanner type ------------------------------------------------- */ | |
3d2a6e4d | 1012 | /* This code was contributed by David Saez */ |
8523533c TK |
1013 | else if (strcmpic(scanner_name,US"clamd") == 0) { |
1014 | uschar *clamd_options; | |
1015 | uschar clamd_options_buffer[1024]; | |
1016 | uschar clamd_options_default[] = "/tmp/clamd"; | |
1017 | uschar *p,*vname; | |
1018 | struct sockaddr_un server; | |
f7b63901 | 1019 | int sock,bread=0; |
8e669ac1 | 1020 | unsigned int port; |
8523533c TK |
1021 | uschar file_name[1024]; |
1022 | uschar av_buffer[1024]; | |
1023 | uschar hostname[256]; | |
1024 | struct hostent *he; | |
1025 | struct in_addr in; | |
2376f2f5 TK |
1026 | uschar *clamd_options2; |
1027 | uschar clamd_options2_buffer[1024]; | |
1028 | uschar clamd_options2_default[] = ""; | |
1029 | uschar av_buffer2[1024]; | |
1030 | uschar *clamav_fbuf; | |
1031 | uschar scanrequest[1024]; | |
1032 | int sockData, clam_fd, result; | |
1033 | unsigned int fsize; | |
8523533c TK |
1034 | |
1035 | if ((clamd_options = string_nextinlist(&av_scanner_work, &sep, | |
1036 | clamd_options_buffer, | |
1037 | sizeof(clamd_options_buffer))) == NULL) { | |
1038 | /* no options supplied, use default options */ | |
1039 | clamd_options = clamd_options_default; | |
1040 | } | |
2376f2f5 TK |
1041 | if ((clamd_options2 = string_nextinlist(&av_scanner_work, &sep, |
1042 | clamd_options2_buffer, | |
1043 | sizeof(clamd_options2_buffer))) == NULL) { | |
1044 | clamd_options2 = clamd_options2_default; | |
1045 | } | |
8e669ac1 | 1046 | |
8523533c TK |
1047 | /* socket does not start with '/' -> network socket */ |
1048 | if (*clamd_options != '/') { | |
8e669ac1 | 1049 | |
8523533c TK |
1050 | /* extract host and port part */ |
1051 | if( sscanf(CS clamd_options, "%s %u", hostname, &port) != 2 ) { | |
1052 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1053 | "malware acl condition: clamd: invalid socket '%s'", clamd_options); | |
1054 | return DEFER; | |
1055 | }; | |
8e669ac1 | 1056 | |
8523533c TK |
1057 | /* Lookup the host */ |
1058 | if((he = gethostbyname(CS hostname)) == 0) { | |
1059 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1060 | "malware acl condition: clamd: failed to lookup host '%s'", hostname); | |
1061 | return DEFER; | |
1062 | } | |
8e669ac1 | 1063 | |
8523533c | 1064 | in = *(struct in_addr *) he->h_addr_list[0]; |
8e669ac1 | 1065 | |
8523533c TK |
1066 | /* Open the ClamAV Socket */ |
1067 | if ( (sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) { | |
1068 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1069 | "malware acl condition: clamd: unable to acquire socket (%s)", | |
1070 | strerror(errno)); | |
1071 | return DEFER; | |
1072 | } | |
8e669ac1 | 1073 | |
8523533c | 1074 | if (ip_connect(sock, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) { |
f1e894f3 | 1075 | (void)close(sock); |
8523533c TK |
1076 | log_write(0, LOG_MAIN|LOG_PANIC, |
1077 | "malware acl condition: clamd: connection to %s, port %u failed (%s)", | |
1078 | inet_ntoa(in), port, strerror(errno)); | |
1079 | return DEFER; | |
1080 | } | |
2376f2f5 TK |
1081 | |
1082 | if (strcmpic(clamd_options2,US"local") == 0) { | |
1083 | ||
1084 | /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */ | |
8e669ac1 | 1085 | |
b07e6aa3 | 1086 | (void)string_format(file_name,1024,"SCAN %s/scan/%s\n", spool_directory, message_id); |
8e669ac1 | 1087 | |
2376f2f5 | 1088 | if (send(sock, file_name, Ustrlen(file_name), 0) < 0) { |
f1e894f3 | 1089 | (void)close(sock); |
2376f2f5 TK |
1090 | log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)", |
1091 | strerror(errno)); | |
1092 | return DEFER; | |
1093 | } | |
1094 | } else { | |
1095 | ||
1096 | /* Pass the string to ClamAV (7 = "STREAM\n") */ | |
1097 | ||
1098 | if (send(sock, "STREAM\n", 7, 0) < 0) { | |
f1e894f3 | 1099 | (void)close(sock); |
2376f2f5 TK |
1100 | log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)", |
1101 | strerror(errno)); | |
1102 | return DEFER; | |
1103 | } | |
1104 | memset(av_buffer2, 0, sizeof(av_buffer2)); | |
a9ccd69a | 1105 | bread = ip_recv(sock, av_buffer2, sizeof(av_buffer2), MALWARE_TIMEOUT); |
2376f2f5 TK |
1106 | |
1107 | if (bread < 0) { | |
1108 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1109 | "malware acl condition: clamd: unable to read PORT from socket (%s)", | |
1110 | strerror(errno)); | |
1111 | return DEFER; | |
1112 | } | |
8e669ac1 | 1113 | |
2376f2f5 TK |
1114 | if (bread == sizeof(av_buffer)) { |
1115 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1116 | "malware acl condition: clamd: buffer too small"); | |
1117 | return DEFER; | |
1118 | } | |
8e669ac1 | 1119 | |
2376f2f5 TK |
1120 | if (!(*av_buffer2)) { |
1121 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1122 | "malware acl condition: clamd: ClamAV returned null"); | |
1123 | return DEFER; | |
1124 | } | |
8e669ac1 | 1125 | |
2376f2f5 | 1126 | av_buffer2[bread] = '\0'; |
3d2a6e4d | 1127 | if( sscanf(CS av_buffer2, "PORT %u\n", &port) != 1 ) { |
2376f2f5 TK |
1128 | log_write(0, LOG_MAIN|LOG_PANIC, |
1129 | "malware acl condition: clamd: Expected port information from clamd, got '%s'", av_buffer2); | |
1130 | return DEFER; | |
1131 | }; | |
8e669ac1 | 1132 | |
2376f2f5 TK |
1133 | if ( (sockData = ip_socket(SOCK_STREAM, AF_INET)) < 0) { |
1134 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1135 | "malware acl condition: clamd: unable to acquire socket (%s)", | |
1136 | strerror(errno)); | |
1137 | return DEFER; | |
1138 | } | |
8e669ac1 | 1139 | |
2376f2f5 | 1140 | if (ip_connect(sockData, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) { |
f1e894f3 | 1141 | (void)close(sockData); |
2376f2f5 TK |
1142 | log_write(0, LOG_MAIN|LOG_PANIC, |
1143 | "malware acl condition: clamd: connection to %s, port %u failed (%s)", | |
1144 | inet_ntoa(in), port, strerror(errno)); | |
1145 | return DEFER; | |
1146 | } | |
1147 | ||
b07e6aa3 | 1148 | (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml", |
384152a6 TK |
1149 | spool_directory, message_id, message_id); |
1150 | ||
1151 | /* calc file size */ | |
1152 | clam_fd = open(CS scanrequest, O_RDONLY); | |
1153 | if (clam_fd == -1) { | |
1154 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1155 | "malware acl condition: clamd: can't open spool file %s: %s", | |
1156 | scanrequest, strerror(errno)); | |
1157 | return DEFER; | |
1158 | } | |
1159 | fsize = lseek(clam_fd, 0, SEEK_END); | |
1160 | if (fsize == -1) { | |
1161 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1162 | "malware acl condition: clamd: can't seek spool file %s: %s", | |
1163 | scanrequest, strerror(errno)); | |
1164 | return DEFER; | |
1165 | } | |
1166 | lseek(clam_fd, 0, SEEK_SET); | |
1167 | ||
1168 | clamav_fbuf = (uschar *) malloc (fsize); | |
1169 | if (!clamav_fbuf) { | |
f1e894f3 PH |
1170 | (void)close(sockData); |
1171 | (void)close(clam_fd); | |
384152a6 TK |
1172 | log_write(0, LOG_MAIN|LOG_PANIC, |
1173 | "malware acl condition: clamd: unable to allocate memory %u for file (%s)", | |
1174 | fsize, scanrequest); | |
1175 | return DEFER; | |
1176 | } | |
1177 | ||
1178 | result = read (clam_fd, clamav_fbuf, fsize); | |
1179 | if (result == -1) { | |
f1e894f3 PH |
1180 | (void)close(sockData); |
1181 | (void)close(clam_fd); | |
384152a6 TK |
1182 | free(clamav_fbuf); |
1183 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1184 | "malware acl condition: clamd: can't read spool file %s: %s", | |
1185 | scanrequest, strerror(errno)); | |
1186 | return DEFER; | |
1187 | } | |
f1e894f3 | 1188 | (void)close(clam_fd); |
384152a6 TK |
1189 | |
1190 | /* send file body to socket */ | |
1191 | if (send(sockData, clamav_fbuf, fsize, 0) < 0) { | |
f1e894f3 | 1192 | (void)close(sockData); |
384152a6 TK |
1193 | free(clamav_fbuf); |
1194 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1195 | "malware acl condition: clamd: unable to send file body to socket (%s:%u)", hostname, port); | |
1196 | return DEFER; | |
1197 | } | |
1198 | free(clamav_fbuf); | |
f1e894f3 | 1199 | (void)close(sockData); |
2376f2f5 | 1200 | } |
8523533c TK |
1201 | } |
1202 | else { | |
1203 | /* open the local socket */ | |
1204 | if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
1205 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1206 | "malware acl condition: clamd: unable to acquire socket (%s)", | |
1207 | strerror(errno)); | |
1208 | return DEFER; | |
1209 | } | |
8e669ac1 | 1210 | |
8523533c TK |
1211 | server.sun_family = AF_UNIX; |
1212 | Ustrcpy(server.sun_path, clamd_options); | |
8e669ac1 | 1213 | |
8523533c | 1214 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { |
f1e894f3 | 1215 | (void)close(sock); |
8523533c TK |
1216 | log_write(0, LOG_MAIN|LOG_PANIC, |
1217 | "malware acl condition: clamd: unable to connect to UNIX socket %s (%s)", | |
1218 | clamd_options, strerror(errno) ); | |
1219 | return DEFER; | |
1220 | } | |
1221 | } | |
8e669ac1 | 1222 | |
8523533c | 1223 | /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */ |
8e669ac1 | 1224 | |
b07e6aa3 | 1225 | (void)string_format(file_name,1024,"SCAN %s/scan/%s\n", spool_directory, message_id); |
8e669ac1 | 1226 | |
8523533c | 1227 | if (send(sock, file_name, Ustrlen(file_name), 0) < 0) { |
f1e894f3 | 1228 | (void)close(sock); |
8523533c TK |
1229 | log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)", |
1230 | strerror(errno)); | |
1231 | return DEFER; | |
1232 | } | |
8e669ac1 PH |
1233 | |
1234 | /* | |
8523533c | 1235 | We're done sending, close socket for writing. |
8e669ac1 | 1236 | |
8523533c | 1237 | One user reported that clamd 0.70 does not like this any more ... |
8e669ac1 | 1238 | |
8523533c | 1239 | */ |
8e669ac1 | 1240 | |
8523533c | 1241 | /* shutdown(sock, SHUT_WR); */ |
8e669ac1 | 1242 | |
8523533c TK |
1243 | /* Read the result */ |
1244 | memset(av_buffer, 0, sizeof(av_buffer)); | |
a9ccd69a | 1245 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT); |
f1e894f3 | 1246 | (void)close(sock); |
8523533c TK |
1247 | |
1248 | if (!(bread > 0)) { | |
1249 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1250 | "malware acl condition: clamd: unable to read from socket (%s)", | |
1251 | strerror(errno)); | |
1252 | return DEFER; | |
1253 | } | |
8e669ac1 | 1254 | |
8523533c TK |
1255 | if (bread == sizeof(av_buffer)) { |
1256 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1257 | "malware acl condition: clamd: buffer too small"); | |
1258 | return DEFER; | |
1259 | } | |
8e669ac1 | 1260 | |
8523533c TK |
1261 | /* Check the result. ClamAV Returns |
1262 | infected: -> "<filename>: <virusname> FOUND" | |
1263 | not-infected: -> "<filename>: OK" | |
384152a6 | 1264 | error: -> "<filename>: <errcode> ERROR */ |
8e669ac1 | 1265 | |
8523533c TK |
1266 | if (!(*av_buffer)) { |
1267 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1268 | "malware acl condition: clamd: ClamAV returned null"); | |
1269 | return DEFER; | |
1270 | } | |
8e669ac1 | 1271 | |
3c5cd616 TK |
1272 | /* strip newline at the end */ |
1273 | p = av_buffer + Ustrlen(av_buffer) - 1; | |
1274 | if( *p == '\n' ) *p = '\0'; | |
1275 | ||
8523533c TK |
1276 | /* colon in returned output? */ |
1277 | if((p = Ustrrchr(av_buffer,':')) == NULL) { | |
1278 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1279 | "malware acl condition: clamd: ClamAV returned malformed result: %s", | |
8e669ac1 | 1280 | av_buffer); |
8523533c TK |
1281 | return DEFER; |
1282 | } | |
8e669ac1 | 1283 | |
3c5cd616 | 1284 | /* strip filename */ |
8523533c TK |
1285 | ++p; |
1286 | while (*p == ' ') ++p; | |
1287 | vname = p; | |
8523533c TK |
1288 | if ((p = Ustrstr(vname, "FOUND"))!=NULL) { |
1289 | *p=0; | |
1290 | for (--p;p>vname && *p<=32;p--) *p=0; | |
1291 | for (;*vname==32;vname++); | |
1292 | Ustrcpy(malware_name_buffer,vname); | |
1293 | malware_name = malware_name_buffer; | |
1294 | } | |
1295 | else { | |
1296 | if (Ustrstr(vname, "ERROR")!=NULL) { | |
1297 | /* ClamAV reports ERROR | |
1298 | Find line start */ | |
1299 | for (;*vname!='\n' && vname>av_buffer; vname--); | |
1300 | if (*vname=='\n') vname++; | |
1301 | ||
1302 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1303 | "malware acl condition: clamd: ClamAV returned %s",vname); | |
1304 | return DEFER; | |
1305 | } | |
1306 | else { | |
1307 | /* Everything should be OK */ | |
1308 | malware_name = NULL; | |
1309 | } | |
1310 | } | |
1311 | } | |
1312 | /* ----------------------------------------------------------------------- */ | |
8e669ac1 PH |
1313 | |
1314 | ||
8523533c TK |
1315 | /* "mksd" scanner type --------------------------------------------------- */ |
1316 | else if (strcmpic(scanner_name,US"mksd") == 0) { | |
1317 | uschar *mksd_options; | |
1318 | char *mksd_options_end; | |
1319 | uschar mksd_options_buffer[32]; | |
1320 | int mksd_maxproc = 1; /* default, if no option supplied */ | |
1321 | struct sockaddr_un server; | |
1322 | int sock; | |
1323 | int retval; | |
8e669ac1 | 1324 | |
8523533c TK |
1325 | if ((mksd_options = string_nextinlist(&av_scanner_work, &sep, |
1326 | mksd_options_buffer, | |
1327 | sizeof(mksd_options_buffer))) != NULL) { | |
1328 | mksd_maxproc = (int) strtol(CS mksd_options, &mksd_options_end, 10); | |
384152a6 TK |
1329 | if ((*mksd_options == '\0') || (*mksd_options_end != '\0') || |
1330 | (mksd_maxproc < 1) || (mksd_maxproc > 32)) { | |
8523533c TK |
1331 | log_write(0, LOG_MAIN|LOG_PANIC, |
1332 | "malware acl condition: mksd: invalid option '%s'", mksd_options); | |
1333 | return DEFER; | |
1334 | } | |
1335 | } | |
8e669ac1 | 1336 | |
8523533c TK |
1337 | /* open the mksd socket */ |
1338 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
1339 | if (sock < 0) { | |
1340 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1341 | "malware acl condition: can't open UNIX socket."); | |
8e669ac1 | 1342 | return DEFER; |
8523533c TK |
1343 | } |
1344 | server.sun_family = AF_UNIX; | |
1345 | Ustrcpy(server.sun_path, "/var/run/mksd/socket"); | |
1346 | if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) { | |
f1e894f3 | 1347 | (void)close(sock); |
8523533c TK |
1348 | log_write(0, LOG_MAIN|LOG_PANIC, |
1349 | "malware acl condition: unable to connect to mksd UNIX socket (/var/run/mksd/socket). errno=%d", errno); | |
1350 | return DEFER; | |
1351 | } | |
8e669ac1 | 1352 | |
8523533c | 1353 | malware_name = NULL; |
8e669ac1 | 1354 | |
8523533c | 1355 | retval = mksd_scan_packed(sock); |
8e669ac1 | 1356 | |
8523533c TK |
1357 | if (retval != OK) |
1358 | return retval; | |
1359 | } | |
1360 | /* ----------------------------------------------------------------------- */ | |
1361 | ||
1362 | /* "unknown" scanner type ------------------------------------------------- */ | |
1363 | else { | |
1364 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1365 | "malware condition: unknown scanner type '%s'", scanner_name); | |
1366 | return DEFER; | |
1367 | }; | |
1368 | /* ----------------------------------------------------------------------- */ | |
8e669ac1 | 1369 | |
8523533c TK |
1370 | /* set "been here, done that" marker */ |
1371 | malware_ok = 1; | |
1372 | }; | |
1373 | ||
1374 | /* match virus name against pattern (caseless ------->----------v) */ | |
1375 | if ( (malware_name != NULL) && | |
1376 | (regex_match_and_setup(re, malware_name, 0, -1)) ) { | |
1377 | return OK; | |
1378 | } | |
1379 | else { | |
1380 | return FAIL; | |
1381 | }; | |
1382 | } | |
1383 | ||
1384 | ||
1385 | /* simple wrapper for reading lines from sockets */ | |
1386 | int recv_line(int sock, uschar *buffer, int size) { | |
1387 | uschar *p = buffer; | |
1388 | ||
1389 | memset(buffer,0,size); | |
1390 | /* read until \n */ | |
1391 | while(recv(sock,p,1,0) > -1) { | |
1392 | if ((p-buffer) > (size-2)) break; | |
1393 | if (*p == '\n') break; | |
1394 | if (*p != '\r') p++; | |
1395 | }; | |
1396 | *p = '\0'; | |
1397 | ||
1398 | return (p-buffer); | |
1399 | } | |
1400 | ||
1401 | ||
1402 | /* ============= private routines for the "mksd" scanner type ============== */ | |
1403 | ||
1404 | #include <sys/uio.h> | |
1405 | ||
1406 | int mksd_writev (int sock, struct iovec *iov, int iovcnt) | |
1407 | { | |
1408 | int i; | |
8e669ac1 | 1409 | |
8523533c TK |
1410 | for (;;) { |
1411 | do | |
1412 | i = writev (sock, iov, iovcnt); | |
1413 | while ((i < 0) && (errno == EINTR)); | |
1414 | if (i <= 0) { | |
1415 | close (sock); | |
1416 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1417 | "malware acl condition: unable to write to mksd UNIX socket (/var/run/mksd/socket)"); | |
1418 | return -1; | |
1419 | } | |
8e669ac1 | 1420 | |
8523533c TK |
1421 | for (;;) |
1422 | if (i >= iov->iov_len) { | |
1423 | if (--iovcnt == 0) | |
1424 | return 0; | |
1425 | i -= iov->iov_len; | |
1426 | iov++; | |
1427 | } else { | |
1428 | iov->iov_len -= i; | |
1429 | iov->iov_base = CS iov->iov_base + i; | |
1430 | break; | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | int mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size) | |
1436 | { | |
1437 | int offset = 0; | |
1438 | int i; | |
8e669ac1 | 1439 | |
8523533c TK |
1440 | do { |
1441 | if ((i = recv (sock, av_buffer+offset, av_buffer_size-offset, 0)) <= 0) { | |
1442 | close (sock); | |
1443 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1444 | "malware acl condition: unable to read from mksd UNIX socket (/var/run/mksd/socket)"); | |
1445 | return -1; | |
1446 | } | |
8e669ac1 | 1447 | |
8523533c TK |
1448 | offset += i; |
1449 | /* offset == av_buffer_size -> buffer full */ | |
1450 | if (offset == av_buffer_size) { | |
1451 | close (sock); | |
1452 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1453 | "malware acl condition: malformed reply received from mksd"); | |
1454 | return -1; | |
1455 | } | |
1456 | } while (av_buffer[offset-1] != '\n'); | |
8e669ac1 | 1457 | |
8523533c TK |
1458 | av_buffer[offset] = '\0'; |
1459 | return offset; | |
1460 | } | |
1461 | ||
1462 | int mksd_parse_line (char *line) | |
1463 | { | |
1464 | char *p; | |
8e669ac1 | 1465 | |
8523533c TK |
1466 | switch (*line) { |
1467 | case 'O': | |
1468 | /* OK */ | |
1469 | return OK; | |
1470 | case 'E': | |
1471 | case 'A': | |
1472 | /* ERR */ | |
1473 | if ((p = strchr (line, '\n')) != NULL) | |
1474 | (*p) = '\0'; | |
1475 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1476 | "malware acl condition: mksd scanner failed: %s", line); | |
1477 | return DEFER; | |
1478 | default: | |
1479 | /* VIR */ | |
1480 | if ((p = strchr (line, '\n')) != NULL) { | |
1481 | (*p) = '\0'; | |
1482 | if (((p-line) > 5) && ((p-line) < sizeof (malware_name_buffer)) && (line[3] == ' ')) | |
1483 | if (((p = strchr (line+4, ' ')) != NULL) && ((p-line) > 4)) { | |
1484 | (*p) = '\0'; | |
1485 | Ustrcpy (malware_name_buffer, line+4); | |
384152a6 | 1486 | malware_name = malware_name_buffer; |
8523533c TK |
1487 | return OK; |
1488 | } | |
1489 | } | |
1490 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1491 | "malware acl condition: malformed reply received from mksd: %s", line); | |
1492 | return DEFER; | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | int mksd_scan_packed (int sock) | |
1497 | { | |
1498 | struct iovec iov[7]; | |
1499 | char *cmd = "MSQ/scan/.eml\n"; | |
1500 | uschar av_buffer[1024]; | |
8e669ac1 | 1501 | |
8523533c TK |
1502 | iov[0].iov_base = cmd; |
1503 | iov[0].iov_len = 3; | |
1504 | iov[1].iov_base = CS spool_directory; | |
1505 | iov[1].iov_len = Ustrlen (spool_directory); | |
1506 | iov[2].iov_base = cmd + 3; | |
1507 | iov[2].iov_len = 6; | |
1508 | iov[3].iov_base = iov[5].iov_base = CS message_id; | |
1509 | iov[3].iov_len = iov[5].iov_len = Ustrlen (message_id); | |
1510 | iov[4].iov_base = cmd + 3; | |
1511 | iov[4].iov_len = 1; | |
1512 | iov[6].iov_base = cmd + 9; | |
1513 | iov[6].iov_len = 5; | |
8e669ac1 | 1514 | |
8523533c TK |
1515 | if (mksd_writev (sock, iov, 7) < 0) |
1516 | return DEFER; | |
8e669ac1 | 1517 | |
8523533c TK |
1518 | if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer)) < 0) |
1519 | return DEFER; | |
8e669ac1 | 1520 | |
8523533c | 1521 | close (sock); |
8e669ac1 | 1522 | |
8523533c TK |
1523 | return mksd_parse_line (CS av_buffer); |
1524 | } | |
1525 | ||
1526 | #endif |