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[exim.git] / src / src / malware.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-2014 */
6 /* License: GPL */
7
8 /* Code for calling virus (malware) scanners. Called from acl.c. */
9
10 #include "exim.h"
11 #ifdef WITH_CONTENT_SCAN
12
13 typedef enum {M_FPROTD, M_DRWEB, M_AVES, M_FSEC, M_KAVD, M_CMDL,
14 M_SOPHIE, M_CLAMD, M_SOCK, M_MKSD, M_AVAST} scanner_t;
15 typedef enum {MC_NONE, MC_TCP, MC_UNIX, MC_STRM} contype_t;
16 static struct scan
17 {
18 scanner_t scancode;
19 const uschar * name;
20 const uschar * options_default;
21 contype_t conn;
22 } m_scans[] =
23 {
24 { M_FPROTD, US"f-protd", US"localhost 10200-10204", MC_TCP },
25 { M_DRWEB, US"drweb", US"/usr/local/drweb/run/drwebd.sock", MC_STRM },
26 { M_AVES, US"aveserver", US"/var/run/aveserver", MC_UNIX },
27 { M_FSEC, US"fsecure", US"/var/run/.fsav", MC_UNIX },
28 { M_KAVD, US"kavdaemon", US"/var/run/AvpCtl", MC_UNIX },
29 { M_CMDL, US"cmdline", NULL, MC_NONE },
30 { M_SOPHIE, US"sophie", US"/var/run/sophie", MC_UNIX },
31 { M_CLAMD, US"clamd", US"/tmp/clamd", MC_NONE },
32 { M_SOCK, US"sock", US"/tmp/malware.sock", MC_STRM },
33 { M_MKSD, US"mksd", NULL, MC_NONE },
34 { M_AVAST, US"avast", US"/var/run/avast/scan.sock", MC_STRM },
35 { -1, NULL, NULL, MC_NONE } /* end-marker */
36 };
37
38 /* The maximum number of clamd servers that are supported in the configuration */
39 #define MAX_CLAMD_SERVERS 32
40 #define MAX_CLAMD_SERVERS_S "32"
41 /* Maximum length of the hostname that can be specified in the clamd address list */
42 #define MAX_CLAMD_ADDRESS_LENGTH 64
43 #define MAX_CLAMD_ADDRESS_LENGTH_S "64"
44
45 typedef struct clamd_address_container {
46 uschar tcp_addr[MAX_CLAMD_ADDRESS_LENGTH+1];
47 unsigned int tcp_port;
48 } clamd_address_container;
49
50 #ifndef nelements
51 # define nelements(arr) (sizeof(arr) / sizeof(arr[0]))
52 #endif
53
54
55 #define MALWARE_TIMEOUT 120 /* default timeout, seconds */
56
57
58 #define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */
59 #define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */
60 #define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */
61
62 #define DERR_READ_ERR (1<<0) /* read error */
63 #define DERR_NOMEMORY (1<<2) /* no memory */
64 #define DERR_TIMEOUT (1<<9) /* scan timeout has run out */
65 #define DERR_BAD_CALL (1<<15) /* wrong command */
66
67
68 static const uschar * malware_regex_default = US ".+";
69 static const pcre * malware_default_re = NULL;
70
71 static const uschar * drweb_re_str = US "infected\\swith\\s*(.+?)$";
72 static const pcre * drweb_re = NULL;
73
74 static const uschar * fsec_re_str = US "\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$";
75 static const pcre * fsec_re = NULL;
76
77 static const uschar * kav_re_sus_str = US "suspicion:\\s*(.+?)\\s*$";
78 static const uschar * kav_re_inf_str = US "infected:\\s*(.+?)\\s*$";
79 static const pcre * kav_re_sus = NULL;
80 static const pcre * kav_re_inf = NULL;
81
82 static const uschar * ava_re_clean_str = US "(?!\\\\)\\t\\[\\+\\]";
83 static const uschar * ava_re_virus_str = US "(?!\\\\)\\t\\[L\\]\\d\\.\\d\\t\\d\\s(.*)";
84 static const pcre * ava_re_clean = NULL;
85 static const pcre * ava_re_virus = NULL;
86
87
88
89 /******************************************************************************/
90
91 /* Routine to check whether a system is big- or little-endian.
92 Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html
93 Needed for proper kavdaemon implementation. Sigh. */
94 #define BIG_MY_ENDIAN 0
95 #define LITTLE_MY_ENDIAN 1
96 static int test_byte_order(void);
97 static inline int
98 test_byte_order()
99 {
100 short int word = 0x0001;
101 char *byte = (char *) &word;
102 return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN);
103 }
104
105 BOOL malware_ok = FALSE;
106
107 /* Gross hacks for the -bmalware option; perhaps we should just create
108 the scan directory normally for that case, but look into rigging up the
109 needed header variables if not already set on the command-line? */
110 extern int spool_mbox_ok;
111 extern uschar spooled_message_id[17];
112
113
114
115 static inline int
116 malware_errlog_defer(const uschar * str)
117 {
118 log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str);
119 return DEFER;
120 }
121
122 static int
123 m_errlog_defer(struct scan * scanent, const uschar * str)
124 {
125 return malware_errlog_defer(string_sprintf("%s: %s", scanent->name, str));
126 }
127 static int
128 m_errlog_defer_3(struct scan * scanent, const uschar * str,
129 int fd_to_close)
130 {
131 (void) close(fd_to_close);
132 return m_errlog_defer(scanent, str);
133 }
134
135 /*************************************************/
136
137 /* Only used by the Clamav code, which is working from a list of servers and
138 uses the returned in_addr to get a second connection to the same system.
139 */
140 static inline int
141 m_tcpsocket(const uschar * hostname, unsigned int port,
142 host_item * host, uschar ** errstr)
143 {
144 return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5, host, errstr);
145 }
146
147 static int
148 m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr)
149 {
150 if (send(sock, buf, cnt, 0) < 0) {
151 int err = errno;
152 (void)close(sock);
153 *errstr = string_sprintf("unable to send to socket (%s): %s",
154 buf, strerror(err));
155 return -1;
156 }
157 return sock;
158 }
159
160 static const pcre *
161 m_pcre_compile(const uschar * re, uschar ** errstr)
162 {
163 const uschar * rerror;
164 int roffset;
165 const pcre * cre;
166
167 cre = pcre_compile(CS re, PCRE_COPT, (const char **)&rerror, &roffset, NULL);
168 if (!cre)
169 *errstr= string_sprintf("regular expression error in '%s': %s at offset %d",
170 re, rerror, roffset);
171 return cre;
172 }
173
174 uschar *
175 m_pcre_exec(const pcre * cre, uschar * text)
176 {
177 int ovector[10*3];
178 int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0,
179 ovector, nelements(ovector));
180 uschar * substr = NULL;
181 if (i >= 2) /* Got it */
182 pcre_get_substring(CS text, ovector, i, 1, (const char **) &substr);
183 return substr;
184 }
185
186 static const pcre *
187 m_pcre_nextinlist(uschar ** list, int * sep, char * listerr, uschar ** errstr)
188 {
189 const uschar * list_ele;
190 const pcre * cre = NULL;
191
192 if (!(list_ele = string_nextinlist(list, sep, NULL, 0)))
193 *errstr = US listerr;
194 else
195 cre = m_pcre_compile(CUS list_ele, errstr);
196 return cre;
197 }
198
199 /*
200 Simple though inefficient wrapper for reading a line. Drop CRs and the
201 trailing newline. Can return early on buffer full. Null-terminate.
202 Apply initial timeout if no data ready.
203
204 Return: number of chars - zero for an empty line
205 -1 on EOF
206 -2 on timeout or error
207 */
208 static int
209 recv_line(int fd, uschar * buffer, int bsize, int tmo)
210 {
211 uschar * p = buffer;
212 ssize_t rcv;
213 BOOL ok = FALSE;
214
215 if (!fd_ready(fd, tmo-time(NULL)))
216 return -2;
217
218 /*XXX tmo handling assumes we always get a whole line */
219 /* read until \n */
220 errno = 0;
221 while ((rcv = read(fd, p, 1)) > 0)
222 {
223 ok = TRUE;
224 if (p-buffer > bsize-2) break;
225 if (*p == '\n') break;
226 if (*p != '\r') p++;
227 }
228 if (!ok)
229 {
230 DEBUG(D_acl) debug_printf("Malware scan: read %s (%s)\n",
231 rcv==0 ? "EOF" : "error", strerror(errno));
232 return rcv==0 ? -1 : -2;
233 }
234 *p = '\0';
235
236 DEBUG(D_acl) debug_printf("Malware scan: read '%s'\n", buffer);
237 return p - buffer;
238 }
239
240 /* return TRUE iff size as requested */
241 static BOOL
242 recv_len(int sock, void * buf, int size, int tmo)
243 {
244 return fd_ready(sock, tmo-time(NULL))
245 ? recv(sock, buf, size, 0) == size
246 : FALSE;
247 }
248
249
250
251 /* ============= private routines for the "mksd" scanner type ============== */
252
253 #include <sys/uio.h>
254
255 static inline int
256 mksd_writev (int sock, struct iovec * iov, int iovcnt)
257 {
258 int i;
259
260 for (;;)
261 {
262 do
263 i = writev (sock, iov, iovcnt);
264 while (i < 0 && errno == EINTR);
265 if (i <= 0)
266 {
267 (void) malware_errlog_defer(
268 US"unable to write to mksd UNIX socket (/var/run/mksd/socket)");
269 return -1;
270 }
271 for (;;) /* check for short write */
272 if (i >= iov->iov_len)
273 {
274 if (--iovcnt == 0)
275 return 0;
276 i -= iov->iov_len;
277 iov++;
278 }
279 else
280 {
281 iov->iov_len -= i;
282 iov->iov_base = CS iov->iov_base + i;
283 break;
284 }
285 }
286 }
287
288 static inline int
289 mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, int tmo)
290 {
291 int offset = 0;
292 int i;
293
294 do
295 {
296 i = ip_recv(sock, av_buffer+offset, av_buffer_size-offset, tmo-time(NULL));
297 if (i <= 0)
298 {
299 (void) malware_errlog_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)");
300 return -1;
301 }
302
303 offset += i;
304 /* offset == av_buffer_size -> buffer full */
305 if (offset == av_buffer_size)
306 {
307 (void) malware_errlog_defer(US"malformed reply received from mksd");
308 return -1;
309 }
310 } while (av_buffer[offset-1] != '\n');
311
312 av_buffer[offset] = '\0';
313 return offset;
314 }
315
316 static inline int
317 mksd_parse_line(struct scan * scanent, char * line)
318 {
319 char *p;
320
321 switch (*line)
322 {
323 case 'O': /* OK */
324 return OK;
325
326 case 'E':
327 case 'A': /* ERR */
328 if ((p = strchr (line, '\n')) != NULL)
329 *p = '\0';
330 return m_errlog_defer(scanent,
331 string_sprintf("scanner failed: %s", line));
332
333 default: /* VIR */
334 if ((p = strchr (line, '\n')) != NULL)
335 {
336 *p = '\0';
337 if ( p-line > 5
338 && line[3] == ' '
339 && (p = strchr(line+4, ' ')) != NULL
340 && p-line > 4
341 )
342 {
343 *p = '\0';
344 malware_name = string_copy(US line+4);
345 return OK;
346 }
347 }
348 return m_errlog_defer(scanent,
349 string_sprintf("malformed reply received: %s", line));
350 }
351 }
352
353 static int
354 mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename,
355 int tmo)
356 {
357 struct iovec iov[3];
358 const char *cmd = "MSQ\n";
359 uschar av_buffer[1024];
360
361 iov[0].iov_base = (void *) cmd;
362 iov[0].iov_len = 3;
363 iov[1].iov_base = (void *) scan_filename;
364 iov[1].iov_len = Ustrlen(scan_filename);
365 iov[2].iov_base = (void *) (cmd + 3);
366 iov[2].iov_len = 1;
367
368 if (mksd_writev (sock, iov, 3) < 0)
369 return DEFER;
370
371 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0)
372 return DEFER;
373
374 return mksd_parse_line (scanent, CS av_buffer);
375 }
376
377 /*************************************************
378 * Scan content for malware *
379 *************************************************/
380
381 /* This is an internal interface for scanning an email; the normal interface
382 is via malware(), or there's malware_in_file() used for testing/debugging.
383
384 Arguments:
385 malware_re match condition for "malware="
386 eml_filename the file holding the email to be scanned
387 timeout if nonzero, non-default timeoutl
388 faking whether or not we're faking this up for the -bmalware test
389
390 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
391 where true means malware was found (condition applies)
392 */
393 static int
394 malware_internal(const uschar * malware_re, const uschar * eml_filename,
395 int timeout, BOOL faking)
396 {
397 int sep = 0;
398 uschar *av_scanner_work = av_scanner;
399 uschar *scanner_name;
400 unsigned long mbox_size;
401 FILE *mbox_file;
402 const pcre *re;
403 uschar * errstr;
404 struct scan * scanent;
405 const uschar * scanner_options;
406 int sock = -1;
407 time_t tmo;
408
409 /* make sure the eml mbox file is spooled up */
410 if (!(mbox_file = spool_mbox(&mbox_size, faking ? eml_filename : NULL)))
411 return malware_errlog_defer(US"error while creating mbox spool file");
412
413 /* none of our current scanners need the mbox
414 file as a stream, so we can close it right away */
415 (void)fclose(mbox_file);
416
417 if (!malware_re)
418 return FAIL; /* empty means "don't match anything" */
419
420 /* parse 1st option */
421 if ( (strcmpic(malware_re, US"false") == 0) ||
422 (Ustrcmp(malware_re,"0") == 0) )
423 return FAIL; /* explicitly no matching */
424
425 /* special cases (match anything except empty) */
426 if ( strcmpic(malware_re,US"true") == 0
427 || Ustrcmp(malware_re,"*") == 0
428 || Ustrcmp(malware_re,"1") == 0
429 )
430 {
431 if ( !malware_default_re
432 && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr)))
433 return malware_errlog_defer(errstr);
434 malware_re = malware_regex_default;
435 re = malware_default_re;
436 }
437
438 /* compile the regex, see if it works */
439 else if (!(re = m_pcre_compile(malware_re, &errstr)))
440 return malware_errlog_defer(errstr);
441
442 /* Reset sep that is set by previous string_nextinlist() call */
443 sep = 0;
444
445 /* if av_scanner starts with a dollar, expand it first */
446 if (*av_scanner == '$')
447 {
448 if (!(av_scanner_work = expand_string(av_scanner)))
449 return malware_errlog_defer(
450 string_sprintf("av_scanner starts with $, but expansion failed: %s",
451 expand_string_message));
452
453 DEBUG(D_acl)
454 debug_printf("Expanded av_scanner global: %s\n", av_scanner_work);
455 /* disable result caching in this case */
456 malware_name = NULL;
457 malware_ok = FALSE;
458 }
459
460 /* Do not scan twice (unless av_scanner is dynamic). */
461 if (!malware_ok)
462 {
463 /* find the scanner type from the av_scanner option */
464 if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
465 return malware_errlog_defer(US"av_scanner configuration variable is empty");
466 if (!timeout) timeout = MALWARE_TIMEOUT;
467 tmo = time(NULL) + timeout;
468
469 for (scanent = m_scans; ; scanent++)
470 {
471 if (!scanent->name)
472 return malware_errlog_defer(string_sprintf("unknown scanner type '%s'",
473 scanner_name));
474 if (strcmpic(scanner_name, US scanent->name) != 0)
475 continue;
476 if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
477 scanner_options = scanent->options_default;
478 if (scanent->conn == MC_NONE)
479 break;
480 switch(scanent->conn)
481 {
482 case MC_TCP: sock = ip_tcpsocket(scanner_options, &errstr, 5); break;
483 case MC_UNIX: sock = ip_unixsocket(scanner_options, &errstr); break;
484 case MC_STRM: sock = ip_streamsocket(scanner_options, &errstr, 5); break;
485 default: /* compiler quietening */ break;
486 }
487 if (sock < 0)
488 return m_errlog_defer(scanent, errstr);
489 break;
490 }
491 DEBUG(D_acl) debug_printf("Malware scan: %s tmo %s\n", scanner_name, readconf_printtime(timeout));
492
493 switch (scanent->scancode)
494 {
495 case M_FPROTD: /* "f-protd" scanner type -------------------------------- */
496 {
497 uschar *fp_scan_option;
498 unsigned int detected=0, par_count=0;
499 uschar * scanrequest;
500 uschar buf[32768], *strhelper, *strhelper2;
501 uschar * malware_name_internal = NULL;
502 int len;
503
504 scanrequest = string_sprintf("GET %s", eml_filename);
505
506 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
507 NULL, 0)))
508 {
509 scanrequest = string_sprintf("%s%s%s", scanrequest,
510 par_count ? "%20" : "?", fp_scan_option);
511 par_count++;
512 }
513 scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest);
514 DEBUG(D_acl) debug_printf("Malware scan: issuing %s: %s\n",
515 scanner_name, scanrequest);
516
517 /* send scan request */
518 if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
519 return m_errlog_defer(scanent, errstr);
520
521 while ((len = recv_line(sock, buf, sizeof(buf), tmo)) >= 0)
522 if (len > 0)
523 {
524 if (Ustrstr(buf, US"<detected type=\"") != NULL)
525 detected = 1;
526 else if (detected && (strhelper = Ustrstr(buf, US"<name>")))
527 {
528 if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL)
529 {
530 *strhelper2 = '\0';
531 malware_name_internal = string_copy(strhelper+6);
532 }
533 }
534 else if (Ustrstr(buf, US"<summary code=\""))
535 {
536 malware_name = Ustrstr(buf, US"<summary code=\"11\">")
537 ? malware_name_internal : NULL;
538 break;
539 }
540 }
541 if (len < -1)
542 {
543 (void)close(sock);
544 return DEFER;
545 }
546 break;
547 } /* f-protd */
548
549 case M_DRWEB: /* "drweb" scanner type ----------------------------------- */
550 /* v0.1 - added support for tcp sockets */
551 /* v0.0 - initial release -- support for unix sockets */
552 {
553 int result;
554 off_t fsize;
555 unsigned int fsize_uint;
556 uschar * tmpbuf, *drweb_fbuf;
557 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
558 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
559
560 /* prepare variables */
561 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
562 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
563
564 if (*scanner_options != '/')
565 {
566 /* calc file size */
567 if ((drweb_fd = open(CCS eml_filename, O_RDONLY)) == -1)
568 return m_errlog_defer_3(scanent,
569 string_sprintf("can't open spool file %s: %s",
570 eml_filename, strerror(errno)),
571 sock);
572
573 if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1)
574 {
575 int err = errno;
576 (void)close(drweb_fd);
577 return m_errlog_defer_3(scanent,
578 string_sprintf("can't seek spool file %s: %s",
579 eml_filename, strerror(err)),
580 sock);
581 }
582 fsize_uint = (unsigned int) fsize;
583 if ((off_t)fsize_uint != fsize)
584 {
585 (void)close(drweb_fd);
586 return m_errlog_defer_3(scanent,
587 string_sprintf("seeking spool file %s, size overflow",
588 eml_filename),
589 sock);
590 }
591 drweb_slen = htonl(fsize);
592 lseek(drweb_fd, 0, SEEK_SET);
593
594 DEBUG(D_acl) debug_printf("Malware scan: issuing %s remote scan [%s]\n",
595 scanner_name, scanner_options);
596
597 /* send scan request */
598 if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
599 (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
600 (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
601 (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0))
602 {
603 (void)close(drweb_fd);
604 return m_errlog_defer_3(scanent, string_sprintf(
605 "unable to send commands to socket (%s)", scanner_options),
606 sock);
607 }
608
609 if (!(drweb_fbuf = (uschar *) malloc (fsize_uint)))
610 {
611 (void)close(drweb_fd);
612 return m_errlog_defer_3(scanent,
613 string_sprintf("unable to allocate memory %u for file (%s)",
614 fsize_uint, eml_filename),
615 sock);
616 }
617
618 if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1)
619 {
620 int err = errno;
621 (void)close(drweb_fd);
622 free(drweb_fbuf);
623 return m_errlog_defer_3(scanent,
624 string_sprintf("can't read spool file %s: %s",
625 eml_filename, strerror(err)),
626 sock);
627 }
628 (void)close(drweb_fd);
629
630 /* send file body to socket */
631 if (send(sock, drweb_fbuf, fsize, 0) < 0)
632 {
633 free(drweb_fbuf);
634 return m_errlog_defer_3(scanent, string_sprintf(
635 "unable to send file body to socket (%s)", scanner_options),
636 sock);
637 }
638 (void)close(drweb_fd);
639 }
640 else
641 {
642 drweb_slen = htonl(Ustrlen(eml_filename));
643
644 DEBUG(D_acl) debug_printf("Malware scan: issuing %s local scan [%s]\n",
645 scanner_name, scanner_options);
646
647 /* send scan request */
648 if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
649 (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
650 (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
651 (send(sock, eml_filename, Ustrlen(eml_filename), 0) < 0) ||
652 (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0))
653 return m_errlog_defer_3(scanent, string_sprintf(
654 "unable to send commands to socket (%s)", scanner_options),
655 sock);
656 }
657
658 /* wait for result */
659 if (!recv_len(sock, &drweb_rc, sizeof(drweb_rc), tmo))
660 return m_errlog_defer_3(scanent,
661 US"unable to read return code", sock);
662 drweb_rc = ntohl(drweb_rc);
663
664 if (!recv_len(sock, &drweb_vnum, sizeof(drweb_vnum), tmo))
665 return m_errlog_defer_3(scanent,
666 US"unable to read the number of viruses", sock);
667 drweb_vnum = ntohl(drweb_vnum);
668
669 /* "virus(es) found" if virus number is > 0 */
670 if (drweb_vnum)
671 {
672 int i;
673
674 /* setup default virus name */
675 malware_name = US"unknown";
676
677 /* set up match regex */
678 if (!drweb_re)
679 drweb_re = m_pcre_compile(drweb_re_str, &errstr);
680
681 /* read and concatenate virus names into one string */
682 for (i = 0; i < drweb_vnum; i++)
683 {
684 int size = 0, off = 0, ovector[10*3];
685 /* read the size of report */
686 if (!recv_len(sock, &drweb_slen, sizeof(drweb_slen), tmo))
687 return m_errlog_defer_3(scanent,
688 US"cannot read report size", sock);
689 drweb_slen = ntohl(drweb_slen);
690 tmpbuf = store_get(drweb_slen);
691
692 /* read report body */
693 if (!recv_len(sock, tmpbuf, drweb_slen, tmo))
694 return m_errlog_defer_3(scanent,
695 US"cannot read report string", sock);
696 tmpbuf[drweb_slen] = '\0';
697
698 /* try matcher on the line, grab substring */
699 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0,
700 ovector, nelements(ovector));
701 if (result >= 2)
702 {
703 const char * pre_malware_nb;
704
705 pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb);
706
707 if (i==0) /* the first name we just copy to malware_name */
708 malware_name = string_append(NULL, &size, &off,
709 1, pre_malware_nb);
710
711 else /* concatenate each new virus name to previous */
712 malware_name = string_append(malware_name, &size, &off,
713 2, "/", pre_malware_nb);
714
715 pcre_free_substring(pre_malware_nb);
716 }
717 }
718 }
719 else
720 {
721 const char *drweb_s = NULL;
722
723 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
724 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
725 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
726 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
727 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
728 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
729 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
730 * and others are ignored */
731 if (drweb_s)
732 return m_errlog_defer_3(scanent,
733 string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s),
734 sock);
735
736 /* no virus found */
737 malware_name = NULL;
738 }
739 break;
740 } /* drweb */
741
742 case M_AVES: /* "aveserver" scanner type -------------------------------- */
743 {
744 uschar buf[32768];
745 int result;
746
747 /* read aveserver's greeting and see if it is ready (2xx greeting) */
748 buf[0] = 0;
749 recv_line(sock, buf, sizeof(buf), tmo);
750
751 if (buf[0] != '2') /* aveserver is having problems */
752 return m_errlog_defer_3(scanent,
753 string_sprintf("unavailable (Responded: %s).",
754 ((buf[0] != 0) ? buf : (uschar *)"nothing") ),
755 sock);
756
757 /* prepare our command */
758 (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n",
759 eml_filename);
760
761 /* and send it */
762 DEBUG(D_acl) debug_printf("Malware scan: issuing %s %s\n",
763 scanner_name, buf);
764 if (m_sock_send(sock, buf, Ustrlen(buf), &errstr) < 0)
765 return m_errlog_defer(scanent, errstr);
766
767 malware_name = NULL;
768 result = 0;
769 /* read response lines, find malware name and final response */
770 while (recv_line(sock, buf, sizeof(buf), tmo) > 0)
771 {
772 if (buf[0] == '2')
773 break;
774 if (buf[0] == '5') /* aveserver is having problems */
775 {
776 result = m_errlog_defer(scanent,
777 string_sprintf("unable to scan file %s (Responded: %s).",
778 eml_filename, buf));
779 break;
780 }
781 if (Ustrncmp(buf,"322",3) == 0)
782 {
783 uschar *p = Ustrchr(&buf[4], ' ');
784 *p = '\0';
785 malware_name = string_copy(&buf[4]);
786 }
787 }
788
789 if (m_sock_send(sock, US"quit\r\n", 6, &errstr) < 0)
790 return m_errlog_defer(scanent, errstr);
791
792 /* read aveserver's greeting and see if it is ready (2xx greeting) */
793 buf[0] = 0;
794 recv_line(sock, buf, sizeof(buf), tmo);
795
796 if (buf[0] != '2') /* aveserver is having problems */
797 return m_errlog_defer_3(scanent,
798 string_sprintf("unable to quit dialogue (Responded: %s).",
799 ((buf[0] != 0) ? buf : (uschar *)"nothing") ),
800 sock);
801
802 if (result == DEFER)
803 {
804 (void)close(sock);
805 return DEFER;
806 }
807 break;
808 } /* aveserver */
809
810 case M_FSEC: /* "fsecure" scanner type ---------------------------------- */
811 {
812 int i, j, bread = 0;
813 uschar * file_name;
814 uschar av_buffer[1024];
815 static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n",
816 US"CONFIGURE\tTIMEOUT\t0\n",
817 US"CONFIGURE\tMAXARCH\t5\n",
818 US"CONFIGURE\tMIME\t1\n" };
819
820 malware_name = NULL;
821
822 DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n",
823 scanner_name, scanner_options);
824 /* pass options */
825 memset(av_buffer, 0, sizeof(av_buffer));
826 for (i = 0; i != nelements(cmdopt); i++)
827 {
828
829 if (m_sock_send(sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0)
830 return m_errlog_defer(scanent, errstr);
831
832 bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL));
833 if (bread > 0) av_buffer[bread]='\0';
834 if (bread < 0)
835 return m_errlog_defer_3(scanent,
836 string_sprintf("unable to read answer %d (%s)", i, strerror(errno)),
837 sock);
838 for (j = 0; j < bread; j++)
839 if (av_buffer[j] == '\r' || av_buffer[j] == '\n')
840 av_buffer[j] ='@';
841 }
842
843 /* pass the mailfile to fsecure */
844 file_name = string_sprintf("SCAN\t%s\n", eml_filename);
845
846 if (m_sock_send(sock, file_name, Ustrlen(file_name), &errstr) < 0)
847 return m_errlog_defer(scanent, errstr);
848
849 /* set up match */
850 /* todo also SUSPICION\t */
851 if (!fsec_re)
852 fsec_re = m_pcre_compile(fsec_re_str, &errstr);
853
854 /* read report, linewise. Apply a timeout as the Fsecure daemon
855 sometimes wants an answer to "PING" but they won't tell us what */
856 {
857 uschar * p = av_buffer;
858 uschar * q;
859
860 for (;;)
861 {
862 errno = ETIME;
863 i = av_buffer+sizeof(av_buffer)-p;
864 if ((bread= ip_recv(sock, p, i-1, tmo-time(NULL))) < 0)
865 return m_errlog_defer_3(scanent,
866 string_sprintf("unable to read result (%s)", strerror(errno)),
867 sock);
868
869 for (p[bread] = '\0'; q = strchr(p, '\n'); p = q+1)
870 {
871 *q = '\0';
872
873 /* Really search for virus again? */
874 if (!malware_name)
875 /* try matcher on the line, grab substring */
876 malware_name = m_pcre_exec(fsec_re, p);
877
878 if (Ustrstr(p, "OK\tScan ok."))
879 goto fsec_found;
880 }
881
882 /* copy down the trailing partial line then read another chunk */
883 i = av_buffer+sizeof(av_buffer)-p;
884 memmove(av_buffer, p, i);
885 p = av_buffer+i;
886 }
887 }
888
889 fsec_found:
890 break;
891 } /* fsecure */
892
893 case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */
894 {
895 time_t t;
896 uschar tmpbuf[1024];
897 uschar * scanrequest;
898 int kav_rc;
899 unsigned long kav_reportlen, bread;
900 const pcre *kav_re;
901 uschar *p;
902
903 /* get current date and time, build scan request */
904 time(&t);
905 /* pdp note: before the eml_filename parameter, this scanned the
906 directory; not finding documentation, so we'll strip off the directory.
907 The side-effect is that the test framework scanning may end up in
908 scanning more than was requested, but for the normal interface, this is
909 fine. */
910
911 strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t));
912 scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename);
913 p = Ustrrchr(scanrequest, '/');
914 if (p)
915 *p = '\0';
916
917 DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n",
918 scanner_name, scanner_options);
919
920 /* send scan request */
921 if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
922 return m_errlog_defer(scanent, errstr);
923
924 /* wait for result */
925 if (!recv_len(sock, tmpbuf, 2, tmo))
926 return m_errlog_defer_3(scanent,
927 US"unable to read 2 bytes from socket.", sock);
928
929 /* get errorcode from one nibble */
930 kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F;
931 switch(kav_rc)
932 {
933 case 5: case 6: /* improper kavdaemon configuration */
934 return m_errlog_defer_3(scanent,
935 US"please reconfigure kavdaemon to NOT disinfect or remove infected files.",
936 sock);
937 case 1:
938 return m_errlog_defer_3(scanent,
939 US"reported 'scanning not completed' (code 1).", sock);
940 case 7:
941 return m_errlog_defer_3(scanent,
942 US"reported 'kavdaemon damaged' (code 7).", sock);
943 }
944
945 /* code 8 is not handled, since it is ambigous. It appears mostly on
946 bounces where part of a file has been cut off */
947
948 /* "virus found" return codes (2-4) */
949 if (kav_rc > 1 && kav_rc < 5)
950 {
951 int report_flag = 0;
952
953 /* setup default virus name */
954 malware_name = US"unknown";
955
956 report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ];
957
958 /* read the report, if available */
959 if (report_flag == 1)
960 {
961 /* read report size */
962 if (!recv_len(sock, &kav_reportlen, 4, tmo))
963 return m_errlog_defer_3(scanent,
964 US"cannot read report size", sock);
965
966 /* it's possible that avp returns av_buffer[1] == 1 but the
967 reportsize is 0 (!?) */
968 if (kav_reportlen > 0)
969 {
970 /* set up match regex, depends on retcode */
971 if (kav_rc == 3)
972 {
973 if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr);
974 kav_re = kav_re_sus;
975 }
976 else
977 {
978 if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr);
979 kav_re = kav_re_inf;
980 }
981
982 /* read report, linewise */
983 while (kav_reportlen > 0)
984 {
985 if ((bread = recv_line(sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0)
986 break;
987 kav_reportlen -= bread+1;
988
989 /* try matcher on the line, grab substring */
990 if ((malware_name = m_pcre_exec(kav_re, tmpbuf)))
991 break;
992 }
993 }
994 }
995 }
996 else /* no virus found */
997 malware_name = NULL;
998
999 break;
1000 }
1001
1002 case M_CMDL: /* "cmdline" scanner type ---------------------------------- */
1003 {
1004 const uschar *cmdline_scanner = scanner_options;
1005 const pcre *cmdline_trigger_re;
1006 const pcre *cmdline_regex_re;
1007 uschar * file_name;
1008 uschar * commandline;
1009 void (*eximsigchld)(int);
1010 void (*eximsigpipe)(int);
1011 FILE *scanner_out = NULL;
1012 int scanner_fd;
1013 FILE *scanner_record = NULL;
1014 uschar linebuffer[32767];
1015 int rcnt;
1016 int trigger = 0;
1017 uschar *p;
1018
1019 if (!cmdline_scanner)
1020 return m_errlog_defer(scanent, errstr);
1021
1022 /* find scanner output trigger */
1023 cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1024 "missing trigger specification", &errstr);
1025 if (!cmdline_trigger_re)
1026 return m_errlog_defer(scanent, errstr);
1027
1028 /* find scanner name regex */
1029 cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1030 "missing virus name regex specification", &errstr);
1031 if (!cmdline_regex_re)
1032 return m_errlog_defer(scanent, errstr);
1033
1034 /* prepare scanner call; despite the naming, file_name holds a directory
1035 name which is documented as the value given to %s. */
1036
1037 file_name = string_copy(eml_filename);
1038 p = Ustrrchr(file_name, '/');
1039 if (p)
1040 *p = '\0';
1041 commandline = string_sprintf(CS cmdline_scanner, file_name);
1042
1043 /* redirect STDERR too */
1044 commandline = string_sprintf("%s 2>&1", commandline);
1045
1046 DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n",
1047 scanner_name, commandline);
1048
1049 /* store exims signal handlers */
1050 eximsigchld = signal(SIGCHLD,SIG_DFL);
1051 eximsigpipe = signal(SIGPIPE,SIG_DFL);
1052
1053 if (!(scanner_out = popen(CS commandline,"r")))
1054 {
1055 int err = errno;
1056 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1057 return m_errlog_defer(scanent,
1058 string_sprintf("call (%s) failed: %s.", commandline, strerror(err)));
1059 }
1060 scanner_fd = fileno(scanner_out);
1061
1062 file_name = string_sprintf("%s/scan/%s/%s_scanner_output",
1063 spool_directory, message_id, message_id);
1064
1065 if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE)))
1066 {
1067 int err = errno;
1068 (void) pclose(scanner_out);
1069 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1070 return m_errlog_defer(scanent, string_sprintf(
1071 "opening scanner output file (%s) failed: %s.",
1072 file_name, strerror(err)));
1073 }
1074
1075 /* look for trigger while recording output */
1076 while ((rcnt = recv_line(scanner_fd, linebuffer,
1077 sizeof(linebuffer), tmo)))
1078 {
1079 if (rcnt < 0)
1080 if (rcnt == -1)
1081 break;
1082 else
1083 {
1084 int err = errno;
1085 (void) pclose(scanner_out);
1086 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1087 return m_errlog_defer(scanent, string_sprintf(
1088 "unable to read from scanner (%s): %s",
1089 commandline, strerror(err)));
1090 }
1091
1092 if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record))
1093 {
1094 /* short write */
1095 (void) pclose(scanner_out);
1096 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1097 return m_errlog_defer(scanent, string_sprintf(
1098 "short write on scanner output file (%s).", file_name));
1099 }
1100 putc('\n', scanner_record);
1101 /* try trigger match */
1102 if ( !trigger
1103 && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)
1104 )
1105 trigger = 1;
1106 }
1107
1108 (void)fclose(scanner_record);
1109 sep = pclose(scanner_out);
1110 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1111 if (sep != 0)
1112 return m_errlog_defer(scanent,
1113 sep == -1
1114 ? string_sprintf("running scanner failed: %s", strerror(sep))
1115 : string_sprintf("scanner returned error code: %d", sep));
1116
1117 if (trigger)
1118 {
1119 uschar * s;
1120 /* setup default virus name */
1121 malware_name = US"unknown";
1122
1123 /* re-open the scanner output file, look for name match */
1124 scanner_record = fopen(CS file_name, "rb");
1125 while (fgets(CS linebuffer, sizeof(linebuffer), scanner_record))
1126 {
1127 /* try match */
1128 if ((s = m_pcre_exec(cmdline_regex_re, linebuffer)))
1129 malware_name = s;
1130 }
1131 (void)fclose(scanner_record);
1132 }
1133 else /* no virus found */
1134 malware_name = NULL;
1135 break;
1136 } /* cmdline */
1137
1138 case M_SOPHIE: /* "sophie" scanner type --------------------------------- */
1139 {
1140 int bread = 0;
1141 uschar *p;
1142 uschar * file_name;
1143 uschar av_buffer[1024];
1144
1145 /* pass the scan directory to sophie */
1146 file_name = string_copy(eml_filename);
1147 if ((p = Ustrrchr(file_name, '/')))
1148 *p = '\0';
1149
1150 DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n",
1151 scanner_name, scanner_options);
1152
1153 if ( write(sock, file_name, Ustrlen(file_name)) < 0
1154 || write(sock, "\n", 1) != 1
1155 )
1156 return m_errlog_defer_3(scanent,
1157 string_sprintf("unable to write to UNIX socket (%s)", scanner_options),
1158 sock);
1159
1160 /* wait for result */
1161 memset(av_buffer, 0, sizeof(av_buffer));
1162 if ((bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL))) <= 0)
1163 return m_errlog_defer_3(scanent,
1164 string_sprintf("unable to read from UNIX socket (%s)", scanner_options),
1165 sock);
1166
1167 /* infected ? */
1168 if (av_buffer[0] == '1') {
1169 uschar * s = Ustrchr(av_buffer, '\n');
1170 if (s)
1171 *s = '\0';
1172 malware_name = string_copy(&av_buffer[2]);
1173 }
1174 else if (!strncmp(CS av_buffer, "-1", 2))
1175 return m_errlog_defer_3(scanent, US"scanner reported error", sock);
1176 else /* all ok, no virus */
1177 malware_name = NULL;
1178
1179 break;
1180 }
1181
1182 case M_CLAMD: /* "clamd" scanner type ----------------------------------- */
1183 {
1184 /* This code was originally contributed by David Saez */
1185 /* There are three scanning methods available to us:
1186 * (1) Use the SCAN command, pointing to a file in the filesystem
1187 * (2) Use the STREAM command, send the data on a separate port
1188 * (3) Use the zINSTREAM command, send the data inline
1189 * The zINSTREAM command was introduced with ClamAV 0.95, which marked
1190 * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095
1191 * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that
1192 * the TCP-connected daemon is actually local; otherwise we use zINSTREAM unless
1193 * WITH_OLD_CLAMAV_STREAM is defined.
1194 * See Exim bug 926 for details. */
1195
1196 uschar *p, *vname, *result_tag, *response_end;
1197 int bread=0;
1198 uschar * file_name;
1199 uschar av_buffer[1024];
1200 uschar *hostname = US"";
1201 host_item connhost;
1202 uschar *clamav_fbuf;
1203 int clam_fd, result;
1204 off_t fsize;
1205 unsigned int fsize_uint;
1206 BOOL use_scan_command = FALSE;
1207 clamd_address_container * clamd_address_vector[MAX_CLAMD_SERVERS];
1208 int num_servers = 0;
1209 #ifdef WITH_OLD_CLAMAV_STREAM
1210 unsigned int port;
1211 uschar av_buffer2[1024];
1212 int sockData;
1213 #else
1214 uint32_t send_size, send_final_zeroblock;
1215 #endif
1216
1217 if (*scanner_options == '/')
1218 /* Local file; so we def want to use_scan_command and don't want to try
1219 * passing IP/port combinations */
1220 use_scan_command = TRUE;
1221 else
1222 {
1223 const uschar *address = scanner_options;
1224 uschar address_buffer[MAX_CLAMD_ADDRESS_LENGTH + 20];
1225
1226 /* Go through the rest of the list of host/port and construct an array
1227 * of servers to try. The first one is the bit we just passed from
1228 * scanner_options so process that first and then scan the remainder of
1229 * the address buffer */
1230 do
1231 {
1232 clamd_address_container *this_clamd;
1233
1234 /* The 'local' option means use the SCAN command over the network
1235 * socket (ie common file storage in use) */
1236 if (strcmpic(address,US"local") == 0)
1237 {
1238 use_scan_command = TRUE;
1239 continue;
1240 }
1241
1242 /* XXX: If unsuccessful we should free this memory */
1243 this_clamd =
1244 (clamd_address_container *)store_get(sizeof(clamd_address_container));
1245
1246 /* extract host and port part */
1247 if( sscanf(CS address, "%" MAX_CLAMD_ADDRESS_LENGTH_S "s %u",
1248 this_clamd->tcp_addr, &(this_clamd->tcp_port)) != 2 )
1249 {
1250 (void) m_errlog_defer(scanent,
1251 string_sprintf("invalid address '%s'", address));
1252 continue;
1253 }
1254
1255 clamd_address_vector[num_servers] = this_clamd;
1256 num_servers++;
1257 if (num_servers >= MAX_CLAMD_SERVERS)
1258 {
1259 (void) m_errlog_defer(scanent,
1260 US"More than " MAX_CLAMD_SERVERS_S " clamd servers "
1261 "specified; only using the first " MAX_CLAMD_SERVERS_S );
1262 break;
1263 }
1264 } while ((address = string_nextinlist(&av_scanner_work, &sep,
1265 address_buffer,
1266 sizeof(address_buffer))) != NULL);
1267
1268 /* check if we have at least one server */
1269 if (!num_servers)
1270 return m_errlog_defer(scanent,
1271 US"no useable server addresses in malware configuration option.");
1272 }
1273
1274 /* See the discussion of response formats below to see why we really
1275 don't like colons in filenames when passing filenames to ClamAV. */
1276 if (use_scan_command && Ustrchr(eml_filename, ':'))
1277 return m_errlog_defer(scanent,
1278 string_sprintf("local/SCAN mode incompatible with" \
1279 " : in path to email filename [%s]", eml_filename));
1280
1281 /* We have some network servers specified */
1282 if (num_servers)
1283 {
1284 /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd
1285 * only supports AF_INET, but we should probably be looking to the
1286 * future and rewriting this to be protocol-independent anyway. */
1287
1288 while (num_servers > 0)
1289 {
1290 int i;
1291 int current_server = random_number( num_servers );
1292
1293 DEBUG(D_acl)
1294 debug_printf("trying server name %s, port %u\n",
1295 clamd_address_vector[current_server]->tcp_addr,
1296 clamd_address_vector[current_server]->tcp_port);
1297
1298 /* Lookup the host. This is to ensure that we connect to the same IP
1299 * on both connections (as one host could resolve to multiple ips) */
1300 sock= m_tcpsocket(clamd_address_vector[current_server]->tcp_addr,
1301 clamd_address_vector[current_server]->tcp_port,
1302 &connhost, &errstr);
1303 if (sock >= 0)
1304 {
1305 /* Connection successfully established with a server */
1306 hostname = clamd_address_vector[current_server]->tcp_addr;
1307 break;
1308 }
1309
1310 log_write(0, LOG_MAIN, "malware acl condition: %s: %s",
1311 scanent->name, errstr);
1312
1313 /* Remove the server from the list. XXX We should free the memory */
1314 num_servers--;
1315 for (i = current_server; i < num_servers; i++)
1316 clamd_address_vector[i] = clamd_address_vector[i+1];
1317 }
1318
1319 if (num_servers == 0)
1320 return m_errlog_defer(scanent, US"all servers failed");
1321 }
1322 else
1323 {
1324 if ((sock = ip_unixsocket(scanner_options, &errstr)) < 0)
1325 return m_errlog_defer(scanent, errstr);
1326 }
1327
1328 /* have socket in variable "sock"; command to use is semi-independent of
1329 * the socket protocol. We use SCAN if is local (either Unix/local
1330 * domain socket, or explicitly told local) else we stream the data.
1331 * How we stream the data depends upon how we were built. */
1332
1333 if (!use_scan_command)
1334 {
1335 #ifdef WITH_OLD_CLAMAV_STREAM
1336 /* "STREAM\n" command, get back a "PORT <N>\n" response, send data to
1337 * that port on a second connection; then in the scan-method-neutral
1338 * part, read the response back on the original connection. */
1339
1340 DEBUG(D_acl) debug_printf(
1341 "Malware scan: issuing %s old-style remote scan (PORT)\n",
1342 scanner_name);
1343
1344 /* Pass the string to ClamAV (7 = "STREAM\n") */
1345 if (m_sock_send(sock, US"STREAM\n", 7, &errstr) < 0)
1346 return m_errlog_defer(scanent, errstr);
1347
1348 memset(av_buffer2, 0, sizeof(av_buffer2));
1349 bread = ip_recv(sock, av_buffer2, sizeof(av_buffer2), tmo-time(NULL));
1350
1351 if (bread < 0)
1352 return m_errlog_defer_3(scanent,
1353 string_sprintf("unable to read PORT from socket (%s)",
1354 strerror(errno)),
1355 sock);
1356
1357 if (bread == sizeof(av_buffer2))
1358 return m_errlog_defer_3(scanent, "buffer too small", sock);
1359
1360 if (!(*av_buffer2))
1361 return m_errlog_defer_3(scanent, "ClamAV returned null", sock);
1362
1363 av_buffer2[bread] = '\0';
1364 if( sscanf(CS av_buffer2, "PORT %u\n", &port) != 1 )
1365 return m_errlog_defer_3(scanent,
1366 string_sprintf("Expected port information from clamd, got '%s'",
1367 av_buffer2),
1368 sock);
1369
1370 sockData = m_tcpsocket(connhost.address, port, NULL, &errstr);
1371 if (sockData < 0)
1372 return m_errlog_defer_3(scanent, errstr, sock);
1373
1374 # define CLOSE_SOCKDATA (void)close(sockData)
1375 #else /* WITH_OLD_CLAMAV_STREAM not defined */
1376 /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data>
1377 chunks, <n> a 4-byte number (network order), terminated by a zero-length
1378 chunk. */
1379
1380 DEBUG(D_acl) debug_printf(
1381 "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n",
1382 scanner_name);
1383
1384 /* Pass the string to ClamAV (10 = "zINSTREAM\0") */
1385 if (send(sock, "zINSTREAM", 10, 0) < 0)
1386 return m_errlog_defer_3(scanent,
1387 string_sprintf("unable to send zINSTREAM to socket (%s)",
1388 strerror(errno)),
1389 sock);
1390
1391 # define CLOSE_SOCKDATA /**/
1392 #endif
1393
1394 /* calc file size */
1395 if ((clam_fd = open(CS eml_filename, O_RDONLY)) < 0)
1396 {
1397 int err = errno;
1398 CLOSE_SOCKDATA;
1399 return m_errlog_defer_3(scanent,
1400 string_sprintf("can't open spool file %s: %s",
1401 eml_filename, strerror(err)),
1402 sock);
1403 }
1404 if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0)
1405 {
1406 int err = errno;
1407 CLOSE_SOCKDATA; (void)close(clam_fd);
1408 return m_errlog_defer_3(scanent,
1409 string_sprintf("can't seek spool file %s: %s",
1410 eml_filename, strerror(err)),
1411 sock);
1412 }
1413 fsize_uint = (unsigned int) fsize;
1414 if ((off_t)fsize_uint != fsize)
1415 {
1416 CLOSE_SOCKDATA; (void)close(clam_fd);
1417 return m_errlog_defer_3(scanent,
1418 string_sprintf("seeking spool file %s, size overflow",
1419 eml_filename),
1420 sock);
1421 }
1422 lseek(clam_fd, 0, SEEK_SET);
1423
1424 if (!(clamav_fbuf = (uschar *) malloc (fsize_uint)))
1425 {
1426 CLOSE_SOCKDATA; (void)close(clam_fd);
1427 return m_errlog_defer_3(scanent,
1428 string_sprintf("unable to allocate memory %u for file (%s)",
1429 fsize_uint, eml_filename),
1430 sock);
1431 }
1432
1433 if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0)
1434 {
1435 int err = errno;
1436 free(clamav_fbuf); CLOSE_SOCKDATA; (void)close(clam_fd);
1437 return m_errlog_defer_3(scanent,
1438 string_sprintf("can't read spool file %s: %s",
1439 eml_filename, strerror(err)),
1440 sock);
1441 }
1442 (void)close(clam_fd);
1443
1444 /* send file body to socket */
1445 #ifdef WITH_OLD_CLAMAV_STREAM
1446 if (send(sockData, clamav_fbuf, fsize_uint, 0) < 0)
1447 {
1448 free(clamav_fbuf); CLOSE_SOCKDATA;
1449 return m_errlog_defer_3(scanent,
1450 string_sprintf("unable to send file body to socket (%s:%u)",
1451 hostname, port),
1452 sock);
1453 }
1454 #else
1455 send_size = htonl(fsize_uint);
1456 send_final_zeroblock = 0;
1457 if ((send(sock, &send_size, sizeof(send_size), 0) < 0) ||
1458 (send(sock, clamav_fbuf, fsize_uint, 0) < 0) ||
1459 (send(sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0))
1460 {
1461 free(clamav_fbuf);
1462 return m_errlog_defer_3(scanent,
1463 string_sprintf("unable to send file body to socket (%s)", hostname),
1464 sock);
1465 }
1466 #endif
1467
1468 free(clamav_fbuf);
1469
1470 CLOSE_SOCKDATA;
1471 #undef CLOSE_SOCKDATA
1472 }
1473 else
1474 { /* use scan command */
1475 /* Send a SCAN command pointing to a filename; then in the then in the
1476 * scan-method-neutral part, read the response back */
1477
1478 /* ================================================================= */
1479
1480 /* Prior to the reworking post-Exim-4.72, this scanned a directory,
1481 which dates to when ClamAV needed us to break apart the email into the
1482 MIME parts (eg, with the now deprecated demime condition coming first).
1483 Some time back, ClamAV gained the ability to deconstruct the emails, so
1484 doing this would actually have resulted in the mail attachments being
1485 scanned twice, in the broken out files and from the original .eml.
1486 Since ClamAV now handles emails (and has for quite some time) we can
1487 just use the email file itself. */
1488 /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */
1489 file_name = string_sprintf("SCAN %s\n", eml_filename);
1490
1491 DEBUG(D_acl) debug_printf(
1492 "Malware scan: issuing %s local-path scan [%s]\n",
1493 scanner_name, scanner_options);
1494
1495 if (send(sock, file_name, Ustrlen(file_name), 0) < 0)
1496 return m_errlog_defer_3(scanent,
1497 string_sprintf("unable to write to socket (%s)", strerror(errno)),
1498 sock);
1499
1500 /* Do not shut down the socket for writing; a user report noted that
1501 * clamd 0.70 does not react well to this. */
1502 }
1503 /* Commands have been sent, no matter which scan method or connection
1504 * type we're using; now just read the result, independent of method. */
1505
1506 /* Read the result */
1507 memset(av_buffer, 0, sizeof(av_buffer));
1508 bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL));
1509 (void)close(sock);
1510 sock = -1;
1511
1512 if (bread <= 0)
1513 return m_errlog_defer(scanent,
1514 string_sprintf("unable to read from socket (%s)",
1515 errno == 0 ? "EOF" : strerror(errno)));
1516
1517 if (bread == sizeof(av_buffer))
1518 return m_errlog_defer(scanent, US"buffer too small");
1519 /* We're now assured of a NULL at the end of av_buffer */
1520
1521 /* Check the result. ClamAV returns one of two result formats.
1522 In the basic mode, the response is of the form:
1523 infected: -> "<filename>: <virusname> FOUND"
1524 not-infected: -> "<filename>: OK"
1525 error: -> "<filename>: <errcode> ERROR
1526 If the ExtendedDetectionInfo option has been turned on, then we get:
1527 "<filename>: <virusname>(<virushash>:<virussize>) FOUND"
1528 for the infected case. Compare:
1529 /tmp/eicar.com: Eicar-Test-Signature FOUND
1530 /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND
1531
1532 In the streaming case, clamd uses the filename "stream" which you should
1533 be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The
1534 client app will replace "stream" with the original filename before returning
1535 results to stdout, but the trace shows the data).
1536
1537 We will assume that the pathname passed to clamd from Exim does not contain
1538 a colon. We will have whined loudly above if the eml_filename does (and we're
1539 passing a filename to clamd). */
1540
1541 if (!(*av_buffer))
1542 return m_errlog_defer(scanent, US"ClamAV returned null");
1543
1544 /* strip newline at the end (won't be present for zINSTREAM)
1545 (also any trailing whitespace, which shouldn't exist, but we depend upon
1546 this below, so double-check) */
1547 p = av_buffer + Ustrlen(av_buffer) - 1;
1548 if (*p == '\n') *p = '\0';
1549
1550 DEBUG(D_acl) debug_printf("Malware response: %s\n", av_buffer);
1551
1552 while (isspace(*--p) && (p > av_buffer))
1553 *p = '\0';
1554 if (*p) ++p;
1555 response_end = p;
1556
1557 /* colon in returned output? */
1558 if((p = Ustrchr(av_buffer,':')) == NULL)
1559 return m_errlog_defer(scanent, string_sprintf(
1560 "ClamAV returned malformed result (missing colon): %s",
1561 av_buffer));
1562
1563 /* strip filename */
1564 while (*p && isspace(*++p)) /**/;
1565 vname = p;
1566
1567 /* It would be bad to encounter a virus with "FOUND" in part of the name,
1568 but we should at least be resistant to it. */
1569 p = Ustrrchr(vname, ' ');
1570 result_tag = p ? p+1 : vname;
1571
1572 if (Ustrcmp(result_tag, "FOUND") == 0)
1573 {
1574 /* p should still be the whitespace before the result_tag */
1575 while (isspace(*p)) --p;
1576 *++p = '\0';
1577 /* Strip off the extended information too, which will be in parens
1578 after the virus name, with no intervening whitespace. */
1579 if (*--p == ')')
1580 {
1581 /* "(hash:size)", so previous '(' will do; if not found, we have
1582 a curious virus name, but not an error. */
1583 p = Ustrrchr(vname, '(');
1584 if (p)
1585 *p = '\0';
1586 }
1587 malware_name = string_copy(vname);
1588 DEBUG(D_acl) debug_printf("Malware found, name \"%s\"\n", malware_name);
1589
1590 }
1591 else if (Ustrcmp(result_tag, "ERROR") == 0)
1592 return m_errlog_defer(scanent,
1593 string_sprintf("ClamAV returned: %s", av_buffer));
1594
1595 else if (Ustrcmp(result_tag, "OK") == 0)
1596 {
1597 /* Everything should be OK */
1598 malware_name = NULL;
1599 DEBUG(D_acl) debug_printf("Malware not found\n");
1600
1601 }
1602 else
1603 return m_errlog_defer(scanent,
1604 string_sprintf("unparseable response from ClamAV: {%s}", av_buffer));
1605
1606 break;
1607 } /* clamd */
1608
1609 case M_SOCK: /* "sock" scanner type ------------------------------------- */
1610 /* This code was derived by Martin Poole from the clamd code contributed
1611 by David Saez and the cmdline code
1612 */
1613 {
1614 int bread;
1615 uschar * commandline;
1616 uschar av_buffer[1024];
1617 uschar * linebuffer;
1618 uschar * sockline_scanner;
1619 uschar sockline_scanner_default[] = "%s\n";
1620 const pcre *sockline_trig_re;
1621 const pcre *sockline_name_re;
1622
1623 /* find scanner command line */
1624 if ((sockline_scanner = string_nextinlist(&av_scanner_work, &sep,
1625 NULL, 0)))
1626 { /* check for no expansions apart from one %s */
1627 uschar * s = Ustrchr(sockline_scanner, '%');
1628 if (s++)
1629 if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%'))
1630 return m_errlog_defer_3(scanent,
1631 US"unsafe sock scanner call spec", sock);
1632 }
1633 else
1634 sockline_scanner = sockline_scanner_default;
1635
1636 /* find scanner output trigger */
1637 sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1638 "missing trigger specification", &errstr);
1639 if (!sockline_trig_re)
1640 return m_errlog_defer_3(scanent, errstr, sock);
1641
1642 /* find virus name regex */
1643 sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1644 "missing virus name regex specification", &errstr);
1645 if (!sockline_name_re)
1646 return m_errlog_defer_3(scanent, errstr, sock);
1647
1648 /* prepare scanner call - security depends on expansions check above */
1649 commandline = string_sprintf("%s/scan/%s/%s.eml", spool_directory, message_id, message_id);
1650 commandline = string_sprintf( CS sockline_scanner, CS commandline);
1651
1652
1653 /* Pass the command string to the socket */
1654 if (m_sock_send(sock, commandline, Ustrlen(commandline), &errstr) < 0)
1655 return m_errlog_defer(scanent, errstr);
1656
1657 /* Read the result */
1658 bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL));
1659
1660 if (bread <= 0)
1661 return m_errlog_defer_3(scanent,
1662 string_sprintf("unable to read from socket (%s)", strerror(errno)),
1663 sock);
1664
1665 if (bread == sizeof(av_buffer))
1666 return m_errlog_defer_3(scanent, US"buffer too small", sock);
1667 av_buffer[bread] = '\0';
1668 linebuffer = string_copy(av_buffer);
1669
1670 /* try trigger match */
1671 if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1))
1672 {
1673 if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer)))
1674 malware_name = US "unknown";
1675 }
1676 else /* no virus found */
1677 malware_name = NULL;
1678 break;
1679 }
1680
1681 case M_MKSD: /* "mksd" scanner type ------------------------------------- */
1682 {
1683 char *mksd_options_end;
1684 int mksd_maxproc = 1; /* default, if no option supplied */
1685 int retval;
1686
1687 if (scanner_options)
1688 {
1689 mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10);
1690 if ( *scanner_options == '\0'
1691 || *mksd_options_end != '\0'
1692 || mksd_maxproc < 1
1693 || mksd_maxproc > 32
1694 )
1695 return m_errlog_defer(scanent,
1696 string_sprintf("invalid option '%s'", scanner_options));
1697 }
1698
1699 if((sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0)
1700 return m_errlog_defer(scanent, errstr);
1701
1702 malware_name = NULL;
1703
1704 DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan\n", scanner_name);
1705
1706 if ((retval = mksd_scan_packed(scanent, sock, eml_filename, tmo)) != OK)
1707 {
1708 close (sock);
1709 return retval;
1710 }
1711 break;
1712 }
1713
1714 case M_AVAST: /* "avast" scanner type ----------------------------------- */
1715 {
1716 int ovector[1*3];
1717 uschar buf[1024];
1718 uschar * scanrequest;
1719 enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage;
1720 int nread;
1721
1722 /* According to Martin Tuma @avast the protocol uses "escaped
1723 whitespace", that is, every embedded whitespace is backslash
1724 escaped, as well as backslash is protected by backslash.
1725 The returned lines contain the name of the scanned file, a tab
1726 and the [ ] marker.
1727 [+] - not infected
1728 [L] - infected
1729 [E] - some error occured
1730 Such marker follows the first non-escaped TAB. */
1731 if ( ( !ava_re_clean
1732 && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr)))
1733 || ( !ava_re_virus
1734 && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr)))
1735 )
1736 return malware_errlog_defer(errstr);
1737
1738 /* wait for result */
1739 for (avast_stage = AVA_HELO;
1740 (nread = recv_line(sock, buf, sizeof(buf), tmo)) > 0;
1741 )
1742 {
1743 int slen = Ustrlen(buf);
1744 if (slen >= 1)
1745 {
1746 DEBUG(D_acl) debug_printf("got from avast: %s\n", buf);
1747 switch (avast_stage)
1748 {
1749 case AVA_HELO:
1750 if (Ustrncmp(buf, "220", 3) != 0)
1751 goto endloop; /* require a 220 */
1752 goto sendreq;
1753
1754 case AVA_OPT:
1755 if (Ustrncmp(buf, "210", 3) == 0)
1756 break; /* ignore 210 responses */
1757 if (Ustrncmp(buf, "200", 3) != 0)
1758 goto endloop; /* require a 200 */
1759
1760 sendreq:
1761 {
1762 int len;
1763 /* Check for another option to send. Newline-terminate it. */
1764 if ((scanrequest = string_nextinlist(&av_scanner_work, &sep,
1765 NULL, 0)))
1766 {
1767 scanrequest = string_sprintf("%s\n", scanrequest);
1768 avast_stage = AVA_OPT; /* just sent option */
1769 }
1770 else
1771 {
1772 scanrequest = string_sprintf("SCAN %s/scan/%s\n",
1773 spool_directory, message_id);
1774 avast_stage = AVA_RSP; /* just sent command */
1775 }
1776
1777 /* send config-cmd or scan-request to socket */
1778 len = Ustrlen(scanrequest);
1779 if (send(sock, scanrequest, len, 0) < 0)
1780 {
1781 scanrequest[len-1] = '\0';
1782 return m_errlog_defer_3(scanent, string_sprintf(
1783 "unable to send request '%s' to socket (%s): %s",
1784 scanrequest, scanner_options, strerror(errno)), sock);
1785 }
1786 break;
1787 }
1788
1789 case AVA_RSP:
1790 if (Ustrncmp(buf, "210", 3) == 0)
1791 break; /* ignore the "210 SCAN DATA" message */
1792
1793 if (pcre_exec(ava_re_clean, NULL, CS buf, slen,
1794 0, 0, ovector, nelements(ovector)) > 0)
1795 break;
1796
1797 if ((malware_name = m_pcre_exec(ava_re_virus, buf)))
1798 { /* remove backslash in front of [whitespace|backslash] */
1799 uschar * p, * p0;
1800 for (p = malware_name; *p; ++p)
1801 if (*p == '\\' && (isspace(p[1]) || p[1] == '\\'))
1802 for (p0 = p; *p0; ++p0) *p0 = p0[1];
1803
1804 avast_stage = AVA_DONE;
1805 goto endloop;
1806 }
1807
1808 if (Ustrncmp(buf, "200 SCAN OK", 11) == 0)
1809 { /* we're done finally */
1810 if (send(sock, "QUIT\n", 5, 0) < 0) /* courtesy */
1811 return m_errlog_defer_3(scanent, string_sprintf(
1812 "unable to send quit request to socket (%s): %s",
1813 scanner_options, strerror(errno)),
1814 sock);
1815 malware_name = NULL;
1816 avast_stage = AVA_DONE;
1817 goto endloop;
1818 }
1819
1820 /* here for any unexpected response from the scanner */
1821 goto endloop;
1822 }
1823 }
1824 }
1825 endloop:
1826
1827 switch(avast_stage)
1828 {
1829 case AVA_HELO:
1830 case AVA_OPT:
1831 case AVA_RSP: return m_errlog_defer_3(scanent,
1832 nread >= 0
1833 ? string_sprintf(
1834 "invalid response from scanner: '%s'", buf)
1835 : nread == -1
1836 ? US"EOF from scanner"
1837 : US"timeout from scanner",
1838 sock);
1839 default: break;
1840 }
1841 }
1842 break;
1843 } /* scanner type switch */
1844
1845 if (sock >= 0)
1846 (void) close (sock);
1847 malware_ok = TRUE; /* set "been here, done that" marker */
1848 }
1849
1850 /* match virus name against pattern (caseless ------->----------v) */
1851 if (malware_name && regex_match_and_setup(re, malware_name, 0, -1))
1852 {
1853 DEBUG(D_acl) debug_printf(
1854 "Matched regex to malware [%s] [%s]\n", malware_re, malware_name);
1855 return OK;
1856 }
1857 else
1858 return FAIL;
1859 }
1860
1861
1862 /*************************************************
1863 * Scan an email for malware *
1864 *************************************************/
1865
1866 /* This is the normal interface for scanning an email, which doesn't need a
1867 filename; it's a wrapper around the malware_file function.
1868
1869 Arguments:
1870 malware_re match condition for "malware="
1871 timeout if nonzero, timeout in seconds
1872
1873 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
1874 where true means malware was found (condition applies)
1875 */
1876 int
1877 malware(const uschar * malware_re, int timeout)
1878 {
1879 uschar * scan_filename;
1880 int ret;
1881
1882 scan_filename = string_sprintf("%s/scan/%s/%s.eml",
1883 spool_directory, message_id, message_id);
1884 ret = malware_internal(malware_re, scan_filename, timeout, FALSE);
1885 if (ret == DEFER) av_failed = TRUE;
1886
1887 return ret;
1888 }
1889
1890
1891 /*************************************************
1892 * Scan a file for malware *
1893 *************************************************/
1894
1895 /* This is a test wrapper for scanning an email, which is not used in
1896 normal processing. Scan any file, using the Exim scanning interface.
1897 This function tampers with various global variables so is unsafe to use
1898 in any other context.
1899
1900 Arguments:
1901 eml_filename a file holding the message to be scanned
1902
1903 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
1904 where true means malware was found (condition applies)
1905 */
1906 int
1907 malware_in_file(uschar *eml_filename)
1908 {
1909 uschar message_id_buf[64];
1910 int ret;
1911
1912 /* spool_mbox() assumes various parameters exist, when creating
1913 the relevant directory and the email within */
1914 (void) string_format(message_id_buf, sizeof(message_id_buf),
1915 "dummy-%d", vaguely_random_number(INT_MAX));
1916 message_id = message_id_buf;
1917 sender_address = US"malware-sender@example.net";
1918 return_path = US"";
1919 recipients_list = NULL;
1920 receive_add_recipient(US"malware-victim@example.net", -1);
1921 enable_dollar_recipients = TRUE;
1922
1923 ret = malware_internal(US"*", eml_filename, 0, TRUE);
1924
1925 Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id));
1926 spool_mbox_ok = 1;
1927 /* don't set no_mbox_unspool; at present, there's no way for it to become
1928 set, but if that changes, then it should apply to these tests too */
1929 unspool_mbox();
1930
1931 /* silence static analysis tools */
1932 message_id = NULL;
1933
1934 return ret;
1935 }
1936
1937
1938 void
1939 malware_init(void)
1940 {
1941 if (!malware_default_re)
1942 malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE);
1943 if (!drweb_re)
1944 drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE);
1945 if (!fsec_re)
1946 fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE);
1947 if (!kav_re_sus)
1948 kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE);
1949 if (!kav_re_inf)
1950 kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE);
1951 if (!ava_re_clean)
1952 ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE);
1953 if (!ava_re_virus)
1954 ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE);
1955 }
1956
1957 #endif /*WITH_CONTENT_SCAN*/
1958 /*
1959 * vi: aw ai sw=2
1960 */
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