1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015
7 * Copyright (c) The Exim Maintainers 2015 - 2018
10 /* Code for calling virus (malware) scanners. Called from acl.c. */
13 #ifdef WITH_CONTENT_SCAN /* entire file */
16 #ifndef DISABLE_MAL_FFROTD
19 #ifndef DISABLE_MAL_FFROT6D
22 #ifndef DISABLE_MAL_DRWEB
25 #ifndef DISABLE_MAL_AVE
28 #ifndef DISABLE_MAL_FSECURE
31 #ifndef DISABLE_MAL_KAV
34 #ifndef DISABLE_MAL_SOPHIE
37 #ifndef DISABLE_MAL_CLAM
40 #ifndef DISABLE_MAL_MKS
43 #ifndef DISABLE_MAL_AVAST
46 #ifndef DISABLE_MAL_SOCK
49 #ifndef DISABLE_MAL_CMDLINE
54 typedef enum {MC_NONE, MC_TCP, MC_UNIX, MC_STRM} contype_t;
59 const uschar * options_default;
63 #ifndef DISABLE_MAL_FFROTD
64 { M_FPROTD, US"f-protd", US"localhost 10200-10204", MC_TCP },
66 #ifndef DISABLE_MAL_FFROT6D
67 { M_FPROT6D, US"f-prot6d", US"localhost 10200", MC_TCP },
69 #ifndef DISABLE_MAL_DRWEB
70 { M_DRWEB, US"drweb", US"/usr/local/drweb/run/drwebd.sock", MC_STRM },
72 #ifndef DISABLE_MAL_AVE
73 { M_AVES, US"aveserver", US"/var/run/aveserver", MC_UNIX },
75 #ifndef DISABLE_MAL_FSECURE
76 { M_FSEC, US"fsecure", US"/var/run/.fsav", MC_UNIX },
78 #ifndef DISABLE_MAL_KAV
79 { M_KAVD, US"kavdaemon", US"/var/run/AvpCtl", MC_UNIX },
81 #ifndef DISABLE_MAL_SOPHIE
82 { M_SOPHIE, US"sophie", US"/var/run/sophie", MC_UNIX },
84 #ifndef DISABLE_MAL_CLAM
85 { M_CLAMD, US"clamd", US"/tmp/clamd", MC_NONE },
87 #ifndef DISABLE_MAL_MKS
88 { M_MKSD, US"mksd", NULL, MC_NONE },
90 #ifndef DISABLE_MAL_AVAST
91 { M_AVAST, US"avast", US"/var/run/avast/scan.sock", MC_STRM },
93 #ifndef DISABLE_MAL_SOCK
94 { M_SOCK, US"sock", US"/tmp/malware.sock", MC_STRM },
96 #ifndef DISABLE_MAL_CMDLINE
97 { M_CMDL, US"cmdline", NULL, MC_NONE },
99 { -1, NULL, NULL, MC_NONE } /* end-marker */
102 /******************************************************************************/
103 # ifdef MACRO_PREDEF /* build solely to predefine macros */
105 # include "macro_predef.h"
108 features_malware(void)
114 spf(buf, sizeof(buf), US"_HAVE_MALWARE_");
116 for (const struct scan * sc = m_scans; sc->scancode != -1; sc++)
118 for (s = sc->name, t = buf+14; *s; s++) if (*s != '-')
121 builtin_macro_create(buf);
125 /******************************************************************************/
126 # else /*!MACRO_PREDEF, main build*/
129 #define MALWARE_TIMEOUT 120 /* default timeout, seconds */
131 static const uschar * malware_regex_default = US ".+";
132 static const pcre * malware_default_re = NULL;
136 #ifndef DISABLE_MAL_CLAM
137 /* The maximum number of clamd servers that are supported in the configuration */
138 # define MAX_CLAMD_SERVERS 32
139 # define MAX_CLAMD_SERVERS_S "32"
141 typedef struct clamd_address {
149 #ifndef DISABLE_MAL_DRWEB
150 # define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */
151 # define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */
152 # define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */
154 # define DERR_READ_ERR (1<<0) /* read error */
155 # define DERR_NOMEMORY (1<<2) /* no memory */
156 # define DERR_TIMEOUT (1<<9) /* scan timeout has run out */
157 # define DERR_BAD_CALL (1<<15) /* wrong command */
159 static const uschar * drweb_re_str = US "infected\\swith\\s*(.+?)$";
160 static const pcre * drweb_re = NULL;
163 #ifndef DISABLE_MAL_FSECURE
164 static const uschar * fsec_re_str = US "\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$";
165 static const pcre * fsec_re = NULL;
168 #ifndef DISABLE_MAL_KAV
169 static const uschar * kav_re_sus_str = US "suspicion:\\s*(.+?)\\s*$";
170 static const uschar * kav_re_inf_str = US "infected:\\s*(.+?)\\s*$";
171 static const pcre * kav_re_sus = NULL;
172 static const pcre * kav_re_inf = NULL;
175 #ifndef DISABLE_MAL_AVAST
176 static const uschar * ava_re_clean_str = US "(?!\\\\)\\t\\[\\+\\]";
177 static const uschar * ava_re_virus_str = US "(?!\\\\)\\t\\[L\\]\\d+\\.0\\t0\\s(.*)";
178 static const uschar * ava_re_error_str = US "(?!\\\\)\\t\\[E\\]\\d+\\.0\\tError\\s\\d+\\s(.*)";
179 static const pcre * ava_re_clean = NULL;
180 static const pcre * ava_re_virus = NULL;
181 static const pcre * ava_re_error = NULL;
184 #ifndef DISABLE_MAL_FFROT6D
185 static const uschar * fprot6d_re_error_str = US "^\\d+\\s<(.+?)>$";
186 static const uschar * fprot6d_re_virus_str = US "^\\d+\\s<infected:\\s+(.+?)>\\s+.+$";
187 static const pcre * fprot6d_re_error = NULL;
188 static const pcre * fprot6d_re_virus = NULL;
193 /******************************************************************************/
195 #ifndef DISABLE_MAL_KAV
196 /* Routine to check whether a system is big- or little-endian.
197 Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html
198 Needed for proper kavdaemon implementation. Sigh. */
199 # define BIG_MY_ENDIAN 0
200 # define LITTLE_MY_ENDIAN 1
201 static int test_byte_order(void);
205 short int word = 0x0001;
206 char *byte = CS &word;
207 return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN);
211 BOOL malware_ok = FALSE;
213 /* Gross hacks for the -bmalware option; perhaps we should just create
214 the scan directory normally for that case, but look into rigging up the
215 needed header variables if not already set on the command-line? */
216 extern int spool_mbox_ok;
217 extern uschar spooled_message_id[MESSAGE_ID_LENGTH+1];
220 /* Some (currently avast only) use backslash escaped whitespace,
221 this function undoes these escapes */
228 if (*p == '\\' && (isspace(p[1]) || p[1] == '\\'))
229 for (p0 = p; *p0; ++p0) *p0 = p0[1];
232 /* --- malware_*_defer --- */
234 malware_panic_defer(const uschar * str)
236 log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str);
240 malware_log_defer(const uschar * str)
242 log_write(0, LOG_MAIN, "malware acl condition: %s", str);
245 /* --- m_*_defer --- */
247 m_panic_defer(struct scan * scanent, const uschar * hostport,
250 return malware_panic_defer(string_sprintf("%s %s : %s",
251 scanent->name, hostport ? hostport : CUS"", str));
254 m_log_defer(struct scan * scanent, const uschar * hostport,
257 return malware_log_defer(string_sprintf("%s %s : %s",
258 scanent->name, hostport ? hostport : CUS"", str));
260 /* --- m_*_defer_3 */
262 m_panic_defer_3(struct scan * scanent, const uschar * hostport,
263 const uschar * str, int fd_to_close)
265 (void) close(fd_to_close);
266 return m_panic_defer(scanent, hostport, str);
269 /*************************************************/
271 #ifndef DISABLE_MAL_CLAM
272 /* Only used by the Clamav code, which is working from a list of servers and
273 uses the returned in_addr to get a second connection to the same system.
276 m_tcpsocket(const uschar * hostname, unsigned int port,
277 host_item * host, uschar ** errstr, const blob * fastopen_blob)
279 return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5,
280 host, errstr, fastopen_blob);
285 m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr)
287 if (send(sock, buf, cnt, 0) < 0)
291 *errstr = string_sprintf("unable to send to socket (%s): %s",
299 m_pcre_compile(const uschar * re, uschar ** errstr)
301 const uschar * rerror;
305 if (!(cre = pcre_compile(CS re, PCRE_COPT, CCSS &rerror, &roffset, NULL)))
306 *errstr= string_sprintf("regular expression error in '%s': %s at offset %d",
307 re, rerror, roffset);
312 m_pcre_exec(const pcre * cre, uschar * text)
315 int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0,
316 ovector, nelem(ovector));
317 uschar * substr = NULL;
318 if (i >= 2) /* Got it */
319 pcre_get_substring(CS text, ovector, i, 1, CCSS &substr);
324 m_pcre_nextinlist(const uschar ** list, int * sep,
325 char * listerr, uschar ** errstr)
327 const uschar * list_ele;
328 const pcre * cre = NULL;
330 if (!(list_ele = string_nextinlist(list, sep, NULL, 0)))
331 *errstr = US listerr;
334 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "RE: ",
335 string_printing(list_ele));
336 cre = m_pcre_compile(CUS list_ele, errstr);
342 Simple though inefficient wrapper for reading a line. Drop CRs and the
343 trailing newline. Can return early on buffer full. Null-terminate.
344 Apply initial timeout if no data ready.
346 Return: number of chars - zero for an empty line
348 -2 on timeout or error
351 recv_line(int fd, uschar * buffer, int bsize, time_t tmo)
357 if (!fd_ready(fd, tmo))
360 /*XXX tmo handling assumes we always get a whole line */
363 while ((rcv = read(fd, p, 1)) > 0)
366 if (p-buffer > bsize-2) break;
367 if (*p == '\n') break;
372 DEBUG(D_acl) debug_printf_indent("Malware scan: read %s (%s)\n",
373 rcv==0 ? "EOF" : "error", strerror(errno));
374 return rcv==0 ? -1 : -2;
378 DEBUG(D_acl) debug_printf_indent("Malware scan: read '%s'\n", buffer);
382 /* return TRUE iff size as requested */
384 recv_len(int sock, void * buf, int size, time_t tmo)
386 return fd_ready(sock, tmo)
387 ? recv(sock, buf, size, 0) == size
393 #ifndef DISABLE_MAL_MKS
394 /* ============= private routines for the "mksd" scanner type ============== */
396 # include <sys/uio.h>
399 mksd_writev (int sock, struct iovec * iov, int iovcnt)
406 i = writev (sock, iov, iovcnt);
407 while (i < 0 && errno == EINTR);
410 (void) malware_panic_defer(
411 US"unable to write to mksd UNIX socket (/var/run/mksd/socket)");
414 for (;;) /* check for short write */
415 if (i >= iov->iov_len)
425 iov->iov_base = CS iov->iov_base + i;
432 mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, time_t tmo)
434 client_conn_ctx cctx = {.sock = sock};
440 i = ip_recv(&cctx, av_buffer+offset, av_buffer_size-offset, tmo);
443 (void) malware_panic_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)");
448 /* offset == av_buffer_size -> buffer full */
449 if (offset == av_buffer_size)
451 (void) malware_panic_defer(US"malformed reply received from mksd");
454 } while (av_buffer[offset-1] != '\n');
456 av_buffer[offset] = '\0';
461 mksd_parse_line(struct scan * scanent, char * line)
472 if ((p = strchr (line, '\n')) != NULL)
474 return m_panic_defer(scanent, NULL,
475 string_sprintf("scanner failed: %s", line));
478 if ((p = strchr (line, '\n')) != NULL)
483 && (p = strchr(line+4, ' ')) != NULL
488 malware_name = string_copy(US line+4);
492 return m_panic_defer(scanent, NULL,
493 string_sprintf("malformed reply received: %s", line));
498 mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename,
502 const char *cmd = "MSQ\n";
503 uschar av_buffer[1024];
505 iov[0].iov_base = (void *) cmd;
507 iov[1].iov_base = (void *) scan_filename;
508 iov[1].iov_len = Ustrlen(scan_filename);
509 iov[2].iov_base = (void *) (cmd + 3);
512 if (mksd_writev (sock, iov, 3) < 0)
515 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0)
518 return mksd_parse_line (scanent, CS av_buffer);
523 #ifndef DISABLE_MAL_CLAM
525 clamd_option(clamd_address * cd, const uschar * optstr, int * subsep)
530 while ((s = string_nextinlist(&optstr, subsep, NULL, 0)))
531 if (Ustrncmp(s, "retry=", 6) == 0)
533 int sec = readconf_readtime((s += 6), '\0', FALSE);
546 /*************************************************
547 * Scan content for malware *
548 *************************************************/
550 /* This is an internal interface for scanning an email; the normal interface
551 is via malware(), or there's malware_in_file() used for testing/debugging.
554 malware_re match condition for "malware="
555 scan_filename the file holding the email to be scanned, if we're faking
556 this up for the -bmalware test, else NULL
557 timeout if nonzero, non-default timeoutl
559 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
560 where true means malware was found (condition applies)
563 malware_internal(const uschar * malware_re, const uschar * scan_filename,
567 const uschar *av_scanner_work = av_scanner;
568 uschar *scanner_name;
569 unsigned long mbox_size;
573 struct scan * scanent;
574 const uschar * scanner_options;
575 client_conn_ctx malware_daemon_ctx = {.sock = -1};
577 uschar * eml_filename, * eml_dir;
580 return FAIL; /* empty means "don't match anything" */
582 /* Ensure the eml mbox file is spooled up */
584 if (!(mbox_file = spool_mbox(&mbox_size, scan_filename, &eml_filename)))
585 return malware_panic_defer(US"error while creating mbox spool file");
587 /* None of our current scanners need the mbox file as a stream (they use
588 the name), so we can close it right away. Get the directory too. */
590 (void) fclose(mbox_file);
591 eml_dir = string_copyn(eml_filename, Ustrrchr(eml_filename, '/') - eml_filename);
593 /* parse 1st option */
594 if (strcmpic(malware_re, US"false") == 0 || Ustrcmp(malware_re,"0") == 0)
595 return FAIL; /* explicitly no matching */
597 /* special cases (match anything except empty) */
598 if ( strcmpic(malware_re,US"true") == 0
599 || Ustrcmp(malware_re,"*") == 0
600 || Ustrcmp(malware_re,"1") == 0
603 if ( !malware_default_re
604 && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr)))
605 return malware_panic_defer(errstr);
606 malware_re = malware_regex_default;
607 re = malware_default_re;
610 /* compile the regex, see if it works */
611 else if (!(re = m_pcre_compile(malware_re, &errstr)))
612 return malware_panic_defer(errstr);
614 /* if av_scanner starts with a dollar, expand it first */
615 if (*av_scanner == '$')
617 if (!(av_scanner_work = expand_string(av_scanner)))
618 return malware_panic_defer(
619 string_sprintf("av_scanner starts with $, but expansion failed: %s",
620 expand_string_message));
623 debug_printf_indent("Expanded av_scanner global: %s\n", av_scanner_work);
624 /* disable result caching in this case */
629 /* Do not scan twice (unless av_scanner is dynamic). */
632 /* find the scanner type from the av_scanner option */
633 if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
634 return malware_panic_defer(US"av_scanner configuration variable is empty");
635 if (!timeout) timeout = MALWARE_TIMEOUT;
636 tmo = time(NULL) + timeout;
638 for (scanent = m_scans; ; scanent++)
641 return malware_panic_defer(string_sprintf("unknown scanner type '%s'",
643 if (strcmpic(scanner_name, US scanent->name) != 0)
645 DEBUG(D_acl) debug_printf_indent("Malware scan: %s tmo=%s\n",
646 scanner_name, readconf_printtime(timeout));
648 if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
649 scanner_options = scanent->options_default;
650 if (scanent->conn == MC_NONE)
653 DEBUG(D_acl) debug_printf_indent("%15s%10s%s\n", "", "socket: ", scanner_options);
654 switch(scanent->conn)
657 malware_daemon_ctx.sock = ip_tcpsocket(scanner_options, &errstr, 5); break;
659 malware_daemon_ctx.sock = ip_unixsocket(scanner_options, &errstr); break;
661 malware_daemon_ctx.sock = ip_streamsocket(scanner_options, &errstr, 5); break;
663 /* compiler quietening */ break;
665 if (malware_daemon_ctx.sock < 0)
666 return m_panic_defer(scanent, CUS callout_address, errstr);
670 switch (scanent->scancode)
672 #ifndef DISABLE_MAL_FFROTD
673 case M_FPROTD: /* "f-protd" scanner type -------------------------------- */
675 uschar *fp_scan_option;
676 unsigned int detected=0, par_count=0;
677 uschar * scanrequest;
678 uschar buf[32768], *strhelper, *strhelper2;
679 uschar * malware_name_internal = NULL;
682 scanrequest = string_sprintf("GET %s", eml_filename);
684 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
687 scanrequest = string_sprintf("%s%s%s", scanrequest,
688 par_count ? "%20" : "?", fp_scan_option);
691 scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest);
692 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
693 scanner_name, scanrequest);
695 /* send scan request */
696 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
697 return m_panic_defer(scanent, CUS callout_address, errstr);
699 while ((len = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) >= 0)
702 if (Ustrstr(buf, US"<detected type=\"") != NULL)
704 else if (detected && (strhelper = Ustrstr(buf, US"<name>")))
706 if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL)
709 malware_name_internal = string_copy(strhelper+6);
712 else if (Ustrstr(buf, US"<summary code=\""))
714 malware_name = Ustrstr(buf, US"<summary code=\"11\">")
715 ? malware_name_internal : NULL;
721 (void)close(malware_daemon_ctx.sock);
728 #ifndef DISABLE_MAL_FFROT6D
729 case M_FPROT6D: /* "f-prot6d" scanner type ----------------------------------- */
734 uschar * scanrequest;
735 uschar av_buffer[1024];
737 if ((!fprot6d_re_virus && !(fprot6d_re_virus = m_pcre_compile(fprot6d_re_virus_str, &errstr)))
738 || (!fprot6d_re_error && !(fprot6d_re_error = m_pcre_compile(fprot6d_re_error_str, &errstr))))
739 return malware_panic_defer(errstr);
741 scanrequest = string_sprintf("SCAN FILE %s\n", eml_filename);
742 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
743 scanner_name, scanrequest);
745 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest), &errstr) < 0)
746 return m_panic_defer(scanent, CUS callout_address, errstr);
748 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
751 return m_panic_defer_3(scanent, CUS callout_address,
752 string_sprintf("unable to read from socket (%s)", strerror(errno)),
753 malware_daemon_ctx.sock);
755 if (bread == sizeof(av_buffer))
756 return m_panic_defer_3(scanent, CUS callout_address,
757 US"buffer too small", malware_daemon_ctx.sock);
759 av_buffer[bread] = '\0';
760 linebuffer = string_copy(av_buffer);
762 m_sock_send(malware_daemon_ctx.sock, US"QUIT\n", 5, 0);
764 if ((e = m_pcre_exec(fprot6d_re_error, linebuffer)))
765 return m_panic_defer_3(scanent, CUS callout_address,
766 string_sprintf("scanner reported error (%s)", e), malware_daemon_ctx.sock);
768 if (!(malware_name = m_pcre_exec(fprot6d_re_virus, linebuffer)))
775 #ifndef DISABLE_MAL_DRWEB
776 case M_DRWEB: /* "drweb" scanner type ----------------------------------- */
777 /* v0.1 - added support for tcp sockets */
778 /* v0.0 - initial release -- support for unix sockets */
782 unsigned int fsize_uint;
783 uschar * tmpbuf, *drweb_fbuf;
784 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
785 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
787 /* prepare variables */
788 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
789 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
791 if (*scanner_options != '/')
794 if ((drweb_fd = open(CCS eml_filename, O_RDONLY)) == -1)
795 return m_panic_defer_3(scanent, NULL,
796 string_sprintf("can't open spool file %s: %s",
797 eml_filename, strerror(errno)),
798 malware_daemon_ctx.sock);
800 if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1)
803 badseek: err = errno;
804 (void)close(drweb_fd);
805 return m_panic_defer_3(scanent, NULL,
806 string_sprintf("can't seek spool file %s: %s",
807 eml_filename, strerror(err)),
808 malware_daemon_ctx.sock);
810 fsize_uint = (unsigned int) fsize;
811 if ((off_t)fsize_uint != fsize)
813 (void)close(drweb_fd);
814 return m_panic_defer_3(scanent, NULL,
815 string_sprintf("seeking spool file %s, size overflow",
817 malware_daemon_ctx.sock);
819 drweb_slen = htonl(fsize);
820 if (lseek(drweb_fd, 0, SEEK_SET) < 0)
823 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s remote scan [%s]\n",
824 scanner_name, scanner_options);
826 /* send scan request */
827 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
828 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
829 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
830 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0))
832 (void)close(drweb_fd);
833 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
834 "unable to send commands to socket (%s)", scanner_options),
835 malware_daemon_ctx.sock);
838 if (!(drweb_fbuf = store_malloc(fsize_uint)))
840 (void)close(drweb_fd);
841 return m_panic_defer_3(scanent, NULL,
842 string_sprintf("unable to allocate memory %u for file (%s)",
843 fsize_uint, eml_filename),
844 malware_daemon_ctx.sock);
847 if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1)
850 (void)close(drweb_fd);
851 store_free(drweb_fbuf);
852 return m_panic_defer_3(scanent, NULL,
853 string_sprintf("can't read spool file %s: %s",
854 eml_filename, strerror(err)),
855 malware_daemon_ctx.sock);
857 (void)close(drweb_fd);
859 /* send file body to socket */
860 if (send(malware_daemon_ctx.sock, drweb_fbuf, fsize, 0) < 0)
862 store_free(drweb_fbuf);
863 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
864 "unable to send file body to socket (%s)", scanner_options),
865 malware_daemon_ctx.sock);
867 store_free(drweb_fbuf);
871 drweb_slen = htonl(Ustrlen(eml_filename));
873 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s local scan [%s]\n",
874 scanner_name, scanner_options);
876 /* send scan request */
877 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
878 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
879 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
880 (send(malware_daemon_ctx.sock, eml_filename, Ustrlen(eml_filename), 0) < 0) ||
881 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0))
882 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
883 "unable to send commands to socket (%s)", scanner_options),
884 malware_daemon_ctx.sock);
887 /* wait for result */
888 if (!recv_len(malware_daemon_ctx.sock, &drweb_rc, sizeof(drweb_rc), tmo))
889 return m_panic_defer_3(scanent, CUS callout_address,
890 US"unable to read return code", malware_daemon_ctx.sock);
891 drweb_rc = ntohl(drweb_rc);
893 if (!recv_len(malware_daemon_ctx.sock, &drweb_vnum, sizeof(drweb_vnum), tmo))
894 return m_panic_defer_3(scanent, CUS callout_address,
895 US"unable to read the number of viruses", malware_daemon_ctx.sock);
896 drweb_vnum = ntohl(drweb_vnum);
898 /* "virus(es) found" if virus number is > 0 */
903 /* setup default virus name */
904 malware_name = US"unknown";
906 /* set up match regex */
908 drweb_re = m_pcre_compile(drweb_re_str, &errstr);
910 /* read and concatenate virus names into one string */
911 for (int i = 0; i < drweb_vnum; i++)
915 /* read the size of report */
916 if (!recv_len(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), tmo))
917 return m_panic_defer_3(scanent, CUS callout_address,
918 US"cannot read report size", malware_daemon_ctx.sock);
919 drweb_slen = ntohl(drweb_slen);
921 /* assume tainted, since it is external input */
922 tmpbuf = store_get(drweb_slen, TRUE);
924 /* read report body */
925 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, drweb_slen, tmo))
926 return m_panic_defer_3(scanent, CUS callout_address,
927 US"cannot read report string", malware_daemon_ctx.sock);
928 tmpbuf[drweb_slen] = '\0';
930 /* try matcher on the line, grab substring */
931 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0,
932 ovector, nelem(ovector));
935 const char * pre_malware_nb;
937 pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb);
939 if (i==0) /* the first name we just copy to malware_name */
940 g = string_cat(NULL, US pre_malware_nb);
942 /*XXX could be string_append_listele? */
943 else /* concatenate each new virus name to previous */
944 g = string_append(g, 2, "/", pre_malware_nb);
946 pcre_free_substring(pre_malware_nb);
949 malware_name = string_from_gstring(g);
953 const char *drweb_s = NULL;
955 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
956 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
957 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
958 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
959 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
960 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
961 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
962 * and others are ignored */
964 return m_panic_defer_3(scanent, CUS callout_address,
965 string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s),
966 malware_daemon_ctx.sock);
975 #ifndef DISABLE_MAL_AVE
976 case M_AVES: /* "aveserver" scanner type -------------------------------- */
981 /* read aveserver's greeting and see if it is ready (2xx greeting) */
983 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
985 if (buf[0] != '2') /* aveserver is having problems */
986 return m_panic_defer_3(scanent, CUS callout_address,
987 string_sprintf("unavailable (Responded: %s).",
988 ((buf[0] != 0) ? buf : US "nothing") ),
989 malware_daemon_ctx.sock);
991 /* prepare our command */
992 (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n",
996 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s %s\n",
998 if (m_sock_send(malware_daemon_ctx.sock, buf, Ustrlen(buf), &errstr) < 0)
999 return m_panic_defer(scanent, CUS callout_address, errstr);
1001 malware_name = NULL;
1003 /* read response lines, find malware name and final response */
1004 while (recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo) > 0)
1008 if (buf[0] == '5') /* aveserver is having problems */
1010 result = m_panic_defer(scanent, CUS callout_address,
1011 string_sprintf("unable to scan file %s (Responded: %s).",
1012 eml_filename, buf));
1015 if (Ustrncmp(buf,"322",3) == 0)
1017 uschar *p = Ustrchr(&buf[4], ' ');
1019 malware_name = string_copy(&buf[4]);
1023 if (m_sock_send(malware_daemon_ctx.sock, US"quit\r\n", 6, &errstr) < 0)
1024 return m_panic_defer(scanent, CUS callout_address, errstr);
1026 /* read aveserver's greeting and see if it is ready (2xx greeting) */
1028 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
1030 if (buf[0] != '2') /* aveserver is having problems */
1031 return m_panic_defer_3(scanent, CUS callout_address,
1032 string_sprintf("unable to quit dialogue (Responded: %s).",
1033 ((buf[0] != 0) ? buf : US "nothing") ),
1034 malware_daemon_ctx.sock);
1036 if (result == DEFER)
1038 (void)close(malware_daemon_ctx.sock);
1045 #ifndef DISABLE_MAL_FSECURE
1046 case M_FSEC: /* "fsecure" scanner type ---------------------------------- */
1050 uschar av_buffer[1024];
1051 static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n",
1052 US"CONFIGURE\tTIMEOUT\t0\n",
1053 US"CONFIGURE\tMAXARCH\t5\n",
1054 US"CONFIGURE\tMIME\t1\n" };
1056 malware_name = NULL;
1058 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1059 scanner_name, scanner_options);
1061 memset(av_buffer, 0, sizeof(av_buffer));
1062 for (i = 0; i != nelem(cmdopt); i++)
1065 if (m_sock_send(malware_daemon_ctx.sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0)
1066 return m_panic_defer(scanent, CUS callout_address, errstr);
1068 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1069 if (bread > 0) av_buffer[bread]='\0';
1071 return m_panic_defer_3(scanent, CUS callout_address,
1072 string_sprintf("unable to read answer %d (%s)", i, strerror(errno)),
1073 malware_daemon_ctx.sock);
1074 for (int j = 0; j < bread; j++)
1075 if (av_buffer[j] == '\r' || av_buffer[j] == '\n')
1079 /* pass the mailfile to fsecure */
1080 file_name = string_sprintf("SCAN\t%s\n", eml_filename);
1082 if (m_sock_send(malware_daemon_ctx.sock, file_name, Ustrlen(file_name), &errstr) < 0)
1083 return m_panic_defer(scanent, CUS callout_address, errstr);
1086 /* todo also SUSPICION\t */
1088 fsec_re = m_pcre_compile(fsec_re_str, &errstr);
1090 /* read report, linewise. Apply a timeout as the Fsecure daemon
1091 sometimes wants an answer to "PING" but they won't tell us what */
1093 uschar * p = av_buffer;
1099 i = av_buffer+sizeof(av_buffer)-p;
1100 if ((bread= ip_recv(&malware_daemon_ctx, p, i-1, tmo)) < 0)
1101 return m_panic_defer_3(scanent, CUS callout_address,
1102 string_sprintf("unable to read result (%s)", strerror(errno)),
1103 malware_daemon_ctx.sock);
1105 for (p[bread] = '\0'; (q = Ustrchr(p, '\n')); p = q+1)
1109 /* Really search for virus again? */
1111 /* try matcher on the line, grab substring */
1112 malware_name = m_pcre_exec(fsec_re, p);
1114 if (Ustrstr(p, "OK\tScan ok."))
1118 /* copy down the trailing partial line then read another chunk */
1119 i = av_buffer+sizeof(av_buffer)-p;
1120 memmove(av_buffer, p, i);
1130 #ifndef DISABLE_MAL_KAV
1131 case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */
1134 uschar tmpbuf[1024];
1135 uschar * scanrequest;
1137 unsigned long kav_reportlen;
1142 /* get current date and time, build scan request */
1144 /* pdp note: before the eml_filename parameter, this scanned the
1145 directory; not finding documentation, so we'll strip off the directory.
1146 The side-effect is that the test framework scanning may end up in
1147 scanning more than was requested, but for the normal interface, this is
1150 strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t));
1151 scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename);
1152 p = Ustrrchr(scanrequest, '/');
1156 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1157 scanner_name, scanner_options);
1159 /* send scan request */
1160 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
1161 return m_panic_defer(scanent, CUS callout_address, errstr);
1163 /* wait for result */
1164 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, 2, tmo))
1165 return m_panic_defer_3(scanent, CUS callout_address,
1166 US"unable to read 2 bytes from socket.", malware_daemon_ctx.sock);
1168 /* get errorcode from one nibble */
1169 kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F;
1172 case 5: case 6: /* improper kavdaemon configuration */
1173 return m_panic_defer_3(scanent, CUS callout_address,
1174 US"please reconfigure kavdaemon to NOT disinfect or remove infected files.",
1175 malware_daemon_ctx.sock);
1177 return m_panic_defer_3(scanent, CUS callout_address,
1178 US"reported 'scanning not completed' (code 1).", malware_daemon_ctx.sock);
1180 return m_panic_defer_3(scanent, CUS callout_address,
1181 US"reported 'kavdaemon damaged' (code 7).", malware_daemon_ctx.sock);
1184 /* code 8 is not handled, since it is ambiguous. It appears mostly on
1185 bounces where part of a file has been cut off */
1187 /* "virus found" return codes (2-4) */
1188 if (kav_rc > 1 && kav_rc < 5)
1190 int report_flag = 0;
1192 /* setup default virus name */
1193 malware_name = US"unknown";
1195 report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ];
1197 /* read the report, if available */
1198 if (report_flag == 1)
1200 /* read report size */
1201 if (!recv_len(malware_daemon_ctx.sock, &kav_reportlen, 4, tmo))
1202 return m_panic_defer_3(scanent, CUS callout_address,
1203 US"cannot read report size", malware_daemon_ctx.sock);
1205 /* it's possible that avp returns av_buffer[1] == 1 but the
1206 reportsize is 0 (!?) */
1207 if (kav_reportlen > 0)
1209 /* set up match regex, depends on retcode */
1212 if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr);
1213 kav_re = kav_re_sus;
1217 if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr);
1218 kav_re = kav_re_inf;
1221 /* read report, linewise. Using size from stream to read amount of data
1222 from same stream is safe enough. */
1223 /* coverity[tainted_data] */
1224 while (kav_reportlen > 0)
1226 if ((bread = recv_line(malware_daemon_ctx.sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0)
1228 kav_reportlen -= bread+1;
1230 /* try matcher on the line, grab substring */
1231 if ((malware_name = m_pcre_exec(kav_re, tmpbuf)))
1237 else /* no virus found */
1238 malware_name = NULL;
1244 #ifndef DISABLE_MAL_CMDLINE
1245 case M_CMDL: /* "cmdline" scanner type ---------------------------------- */
1247 const uschar *cmdline_scanner = scanner_options;
1248 const pcre *cmdline_trigger_re;
1249 const pcre *cmdline_regex_re;
1251 uschar * commandline;
1252 void (*eximsigchld)(int);
1253 void (*eximsigpipe)(int);
1254 FILE *scanner_out = NULL;
1256 FILE *scanner_record = NULL;
1257 uschar linebuffer[32767];
1262 if (!cmdline_scanner)
1263 return m_panic_defer(scanent, NULL, errstr);
1265 /* find scanner output trigger */
1266 cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1267 "missing trigger specification", &errstr);
1268 if (!cmdline_trigger_re)
1269 return m_panic_defer(scanent, NULL, errstr);
1271 /* find scanner name regex */
1272 cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1273 "missing virus name regex specification", &errstr);
1274 if (!cmdline_regex_re)
1275 return m_panic_defer(scanent, NULL, errstr);
1277 /* prepare scanner call; despite the naming, file_name holds a directory
1278 name which is documented as the value given to %s. */
1280 file_name = string_copy(eml_filename);
1281 p = Ustrrchr(file_name, '/');
1284 commandline = string_sprintf(CS cmdline_scanner, file_name);
1286 /* redirect STDERR too */
1287 commandline = string_sprintf("%s 2>&1", commandline);
1289 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1290 scanner_name, commandline);
1292 /* store exims signal handlers */
1293 eximsigchld = signal(SIGCHLD,SIG_DFL);
1294 eximsigpipe = signal(SIGPIPE,SIG_DFL);
1296 if (!(scanner_out = popen(CS commandline,"r")))
1299 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1300 return m_panic_defer(scanent, NULL,
1301 string_sprintf("call (%s) failed: %s.", commandline, strerror(err)));
1303 scanner_fd = fileno(scanner_out);
1305 file_name = string_sprintf("%s/%s_scanner_output", eml_dir, message_id);
1307 if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE)))
1310 (void) pclose(scanner_out);
1311 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1312 return m_panic_defer(scanent, NULL, string_sprintf(
1313 "opening scanner output file (%s) failed: %s.",
1314 file_name, strerror(err)));
1317 /* look for trigger while recording output */
1318 while ((rcnt = recv_line(scanner_fd, linebuffer,
1319 sizeof(linebuffer), tmo)))
1326 (void) pclose(scanner_out);
1327 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1328 return m_panic_defer(scanent, NULL, string_sprintf(
1329 "unable to read from scanner (%s): %s",
1330 commandline, strerror(err)));
1333 if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record))
1336 (void) pclose(scanner_out);
1337 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1338 return m_panic_defer(scanent, NULL, string_sprintf(
1339 "short write on scanner output file (%s).", file_name));
1341 putc('\n', scanner_record);
1342 /* try trigger match */
1344 && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)
1349 (void)fclose(scanner_record);
1350 sep = pclose(scanner_out);
1351 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1353 return m_panic_defer(scanent, NULL,
1355 ? string_sprintf("running scanner failed: %s", strerror(sep))
1356 : string_sprintf("scanner returned error code: %d", sep));
1361 /* setup default virus name */
1362 malware_name = US"unknown";
1364 /* re-open the scanner output file, look for name match */
1365 scanner_record = fopen(CS file_name, "rb");
1366 while (fgets(CS linebuffer, sizeof(linebuffer), scanner_record))
1369 if ((s = m_pcre_exec(cmdline_regex_re, linebuffer)))
1372 (void)fclose(scanner_record);
1374 else /* no virus found */
1375 malware_name = NULL;
1380 #ifndef DISABLE_MAL_SOPHIE
1381 case M_SOPHIE: /* "sophie" scanner type --------------------------------- */
1386 uschar av_buffer[1024];
1388 /* pass the scan directory to sophie */
1389 file_name = string_copy(eml_filename);
1390 if ((p = Ustrrchr(file_name, '/')))
1393 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1394 scanner_name, scanner_options);
1396 if ( write(malware_daemon_ctx.sock, file_name, Ustrlen(file_name)) < 0
1397 || write(malware_daemon_ctx.sock, "\n", 1) != 1
1399 return m_panic_defer_3(scanent, CUS callout_address,
1400 string_sprintf("unable to write to UNIX socket (%s)", scanner_options),
1401 malware_daemon_ctx.sock);
1403 /* wait for result */
1404 memset(av_buffer, 0, sizeof(av_buffer));
1405 if ((bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo)) <= 0)
1406 return m_panic_defer_3(scanent, CUS callout_address,
1407 string_sprintf("unable to read from UNIX socket (%s)", scanner_options),
1408 malware_daemon_ctx.sock);
1411 if (av_buffer[0] == '1') {
1412 uschar * s = Ustrchr(av_buffer, '\n');
1415 malware_name = string_copy(&av_buffer[2]);
1417 else if (!strncmp(CS av_buffer, "-1", 2))
1418 return m_panic_defer_3(scanent, CUS callout_address,
1419 US"scanner reported error", malware_daemon_ctx.sock);
1420 else /* all ok, no virus */
1421 malware_name = NULL;
1427 #ifndef DISABLE_MAL_CLAM
1428 case M_CLAMD: /* "clamd" scanner type ----------------------------------- */
1430 /* This code was originally contributed by David Saez */
1431 /* There are three scanning methods available to us:
1432 * (1) Use the SCAN command, pointing to a file in the filesystem
1433 * (2) Use the STREAM command, send the data on a separate port
1434 * (3) Use the zINSTREAM command, send the data inline
1435 * The zINSTREAM command was introduced with ClamAV 0.95, which marked
1436 * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095
1437 * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that
1438 * the TCP-connected daemon is actually local; otherwise we use zINSTREAM
1439 * See Exim bug 926 for details. */
1441 uschar *p, *vname, *result_tag;
1443 uschar av_buffer[1024];
1444 uschar *hostname = US"";
1446 uschar *clamav_fbuf;
1447 int clam_fd, result;
1449 unsigned int fsize_uint;
1450 BOOL use_scan_command = FALSE;
1451 clamd_address * cv[MAX_CLAMD_SERVERS];
1452 int num_servers = 0;
1453 uint32_t send_size, send_final_zeroblock;
1456 /*XXX if unixdomain socket, only one server supported. Needs fixing;
1457 there's no reason we should not mix local and remote servers */
1459 if (*scanner_options == '/')
1462 const uschar * sublist;
1465 /* Local file; so we def want to use_scan_command and don't want to try
1466 * passing IP/port combinations */
1467 use_scan_command = TRUE;
1468 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1470 /* extract socket-path part */
1471 sublist = scanner_options;
1472 cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0);
1475 if (clamd_option(cd, sublist, &subsep) != OK)
1476 return m_panic_defer(scanent, NULL,
1477 string_sprintf("bad option '%s'", scanner_options));
1482 /* Go through the rest of the list of host/port and construct an array
1483 * of servers to try. The first one is the bit we just passed from
1484 * scanner_options so process that first and then scan the remainder of
1485 * the address buffer */
1489 const uschar * sublist;
1493 /* The 'local' option means use the SCAN command over the network
1494 * socket (ie common file storage in use) */
1495 /*XXX we could accept this also as a local option? */
1496 if (strcmpic(scanner_options, US"local") == 0)
1498 use_scan_command = TRUE;
1502 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1504 /* extract host and port part */
1505 sublist = scanner_options;
1506 if (!(cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0)))
1508 (void) m_panic_defer(scanent, NULL,
1509 string_sprintf("missing address: '%s'", scanner_options));
1512 if (!(s = string_nextinlist(&sublist, &subsep, NULL, 0)))
1514 (void) m_panic_defer(scanent, NULL,
1515 string_sprintf("missing port: '%s'", scanner_options));
1518 cd->tcp_port = atoi(CS s);
1521 /*XXX should these options be common over scanner types? */
1522 if (clamd_option(cd, sublist, &subsep) != OK)
1523 return m_panic_defer(scanent, NULL,
1524 string_sprintf("bad option '%s'", scanner_options));
1526 cv[num_servers++] = cd;
1527 if (num_servers >= MAX_CLAMD_SERVERS)
1529 (void) m_panic_defer(scanent, NULL,
1530 US"More than " MAX_CLAMD_SERVERS_S " clamd servers "
1531 "specified; only using the first " MAX_CLAMD_SERVERS_S );
1534 } while ((scanner_options = string_nextinlist(&av_scanner_work, &sep,
1537 /* check if we have at least one server */
1539 return m_panic_defer(scanent, NULL,
1540 US"no useable server addresses in malware configuration option.");
1543 /* See the discussion of response formats below to see why we really
1544 don't like colons in filenames when passing filenames to ClamAV. */
1545 if (use_scan_command && Ustrchr(eml_filename, ':'))
1546 return m_panic_defer(scanent, NULL,
1547 string_sprintf("local/SCAN mode incompatible with" \
1548 " : in path to email filename [%s]", eml_filename));
1550 /* Set up the very first data we will be sending */
1551 if (!use_scan_command)
1552 { cmd_str.data = US"zINSTREAM"; cmd_str.len = 10; }
1555 cmd_str.data = string_sprintf("SCAN %s\n", eml_filename);
1556 cmd_str.len = Ustrlen(cmd_str.data);
1559 /* We have some network servers specified */
1562 /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd
1563 * only supports AF_INET, but we should probably be looking to the
1564 * future and rewriting this to be protocol-independent anyway. */
1566 while (num_servers > 0)
1568 int i = random_number(num_servers);
1569 clamd_address * cd = cv[i];
1571 DEBUG(D_acl) debug_printf_indent("trying server name %s, port %u\n",
1572 cd->hostspec, cd->tcp_port);
1574 /* Lookup the host. This is to ensure that we connect to the same IP
1575 * on both connections (as one host could resolve to multiple ips) */
1578 /*XXX we trust that the cmd_str is ideempotent */
1579 if ((malware_daemon_ctx.sock = m_tcpsocket(cd->hostspec, cd->tcp_port,
1580 &connhost, &errstr, &cmd_str)) >= 0)
1582 /* Connection successfully established with a server */
1583 hostname = cd->hostspec;
1587 if (cd->retry <= 0) break;
1588 while (cd->retry > 0) cd->retry = sleep(cd->retry);
1590 if (malware_daemon_ctx.sock >= 0)
1593 (void) m_panic_defer(scanent, CUS callout_address, errstr);
1595 /* Remove the server from the list. XXX We should free the memory */
1597 for (; i < num_servers; i++)
1601 if (num_servers == 0)
1602 return m_panic_defer(scanent, NULL, US"all servers failed");
1607 if ((malware_daemon_ctx.sock = ip_unixsocket(cv[0]->hostspec, &errstr)) >= 0)
1609 hostname = cv[0]->hostspec;
1612 if (cv[0]->retry <= 0)
1613 return m_panic_defer(scanent, CUS callout_address, errstr);
1614 while (cv[0]->retry > 0) cv[0]->retry = sleep(cv[0]->retry);
1617 /* have socket in variable "sock"; command to use is semi-independent of
1618 * the socket protocol. We use SCAN if is local (either Unix/local
1619 * domain socket, or explicitly told local) else we stream the data.
1620 * How we stream the data depends upon how we were built. */
1622 if (!use_scan_command)
1624 /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data>
1625 chunks, <n> a 4-byte number (network order), terminated by a zero-length
1628 DEBUG(D_acl) debug_printf_indent(
1629 "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n",
1632 /* Pass the string to ClamAV (10 = "zINSTREAM\0"), if not already sent */
1634 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1635 return m_panic_defer_3(scanent, CUS hostname,
1636 string_sprintf("unable to send zINSTREAM to socket (%s)",
1638 malware_daemon_ctx.sock);
1640 /* calc file size */
1641 if ((clam_fd = open(CS eml_filename, O_RDONLY)) < 0)
1644 return m_panic_defer_3(scanent, NULL,
1645 string_sprintf("can't open spool file %s: %s",
1646 eml_filename, strerror(err)),
1647 malware_daemon_ctx.sock);
1649 if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0)
1652 b_seek: err = errno;
1653 (void)close(clam_fd);
1654 return m_panic_defer_3(scanent, NULL,
1655 string_sprintf("can't seek spool file %s: %s",
1656 eml_filename, strerror(err)),
1657 malware_daemon_ctx.sock);
1659 fsize_uint = (unsigned int) fsize;
1660 if ((off_t)fsize_uint != fsize)
1662 (void)close(clam_fd);
1663 return m_panic_defer_3(scanent, NULL,
1664 string_sprintf("seeking spool file %s, size overflow",
1666 malware_daemon_ctx.sock);
1668 if (lseek(clam_fd, 0, SEEK_SET) < 0)
1671 if (!(clamav_fbuf = store_malloc(fsize_uint)))
1673 (void)close(clam_fd);
1674 return m_panic_defer_3(scanent, NULL,
1675 string_sprintf("unable to allocate memory %u for file (%s)",
1676 fsize_uint, eml_filename),
1677 malware_daemon_ctx.sock);
1680 if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0)
1683 store_free(clamav_fbuf); (void)close(clam_fd);
1684 return m_panic_defer_3(scanent, NULL,
1685 string_sprintf("can't read spool file %s: %s",
1686 eml_filename, strerror(err)),
1687 malware_daemon_ctx.sock);
1689 (void)close(clam_fd);
1691 /* send file body to socket */
1692 send_size = htonl(fsize_uint);
1693 send_final_zeroblock = 0;
1694 if ((send(malware_daemon_ctx.sock, &send_size, sizeof(send_size), 0) < 0) ||
1695 (send(malware_daemon_ctx.sock, clamav_fbuf, fsize_uint, 0) < 0) ||
1696 (send(malware_daemon_ctx.sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0))
1698 store_free(clamav_fbuf);
1699 return m_panic_defer_3(scanent, NULL,
1700 string_sprintf("unable to send file body to socket (%s)", hostname),
1701 malware_daemon_ctx.sock);
1703 store_free(clamav_fbuf);
1706 { /* use scan command */
1707 /* Send a SCAN command pointing to a filename; then in the then in the
1708 * scan-method-neutral part, read the response back */
1710 /* ================================================================= */
1712 /* Prior to the reworking post-Exim-4.72, this scanned a directory,
1713 which dates to when ClamAV needed us to break apart the email into the
1714 MIME parts (eg, with the now deprecated demime condition coming first).
1715 Some time back, ClamAV gained the ability to deconstruct the emails, so
1716 doing this would actually have resulted in the mail attachments being
1717 scanned twice, in the broken out files and from the original .eml.
1718 Since ClamAV now handles emails (and has for quite some time) we can
1719 just use the email file itself. */
1720 /* Pass the string to ClamAV (7 = "SCAN \n" + \0), if not already sent */
1722 DEBUG(D_acl) debug_printf_indent(
1723 "Malware scan: issuing %s local-path scan [%s]\n",
1724 scanner_name, scanner_options);
1727 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1728 return m_panic_defer_3(scanent, CUS callout_address,
1729 string_sprintf("unable to write to socket (%s)", strerror(errno)),
1730 malware_daemon_ctx.sock);
1732 /* Do not shut down the socket for writing; a user report noted that
1733 * clamd 0.70 does not react well to this. */
1735 /* Commands have been sent, no matter which scan method or connection
1736 * type we're using; now just read the result, independent of method. */
1738 /* Read the result */
1739 memset(av_buffer, 0, sizeof(av_buffer));
1740 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1741 (void)close(malware_daemon_ctx.sock);
1742 malware_daemon_ctx.sock = -1;
1743 malware_daemon_ctx.tls_ctx = NULL;
1746 return m_panic_defer(scanent, CUS callout_address,
1747 string_sprintf("unable to read from socket (%s)",
1748 errno == 0 ? "EOF" : strerror(errno)));
1750 if (bread == sizeof(av_buffer))
1751 return m_panic_defer(scanent, CUS callout_address,
1752 US"buffer too small");
1753 /* We're now assured of a NULL at the end of av_buffer */
1755 /* Check the result. ClamAV returns one of two result formats.
1756 In the basic mode, the response is of the form:
1757 infected: -> "<filename>: <virusname> FOUND"
1758 not-infected: -> "<filename>: OK"
1759 error: -> "<filename>: <errcode> ERROR
1760 If the ExtendedDetectionInfo option has been turned on, then we get:
1761 "<filename>: <virusname>(<virushash>:<virussize>) FOUND"
1762 for the infected case. Compare:
1763 /tmp/eicar.com: Eicar-Test-Signature FOUND
1764 /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND
1766 In the streaming case, clamd uses the filename "stream" which you should
1767 be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The
1768 client app will replace "stream" with the original filename before returning
1769 results to stdout, but the trace shows the data).
1771 We will assume that the pathname passed to clamd from Exim does not contain
1772 a colon. We will have whined loudly above if the eml_filename does (and we're
1773 passing a filename to clamd). */
1776 return m_panic_defer(scanent, CUS callout_address,
1777 US"ClamAV returned null");
1779 /* strip newline at the end (won't be present for zINSTREAM)
1780 (also any trailing whitespace, which shouldn't exist, but we depend upon
1781 this below, so double-check) */
1782 p = av_buffer + Ustrlen(av_buffer) - 1;
1783 if (*p == '\n') *p = '\0';
1785 DEBUG(D_acl) debug_printf_indent("Malware response: %s\n", av_buffer);
1787 while (isspace(*--p) && (p > av_buffer))
1791 /* colon in returned output? */
1792 if(!(p = Ustrchr(av_buffer,':')))
1793 return m_panic_defer(scanent, CUS callout_address, string_sprintf(
1794 "ClamAV returned malformed result (missing colon): %s",
1797 /* strip filename */
1798 while (*p && isspace(*++p)) /**/;
1801 /* It would be bad to encounter a virus with "FOUND" in part of the name,
1802 but we should at least be resistant to it. */
1803 p = Ustrrchr(vname, ' ');
1804 result_tag = p ? p+1 : vname;
1806 if (Ustrcmp(result_tag, "FOUND") == 0)
1808 /* p should still be the whitespace before the result_tag */
1809 while (isspace(*p)) --p;
1811 /* Strip off the extended information too, which will be in parens
1812 after the virus name, with no intervening whitespace. */
1815 /* "(hash:size)", so previous '(' will do; if not found, we have
1816 a curious virus name, but not an error. */
1817 p = Ustrrchr(vname, '(');
1821 malware_name = string_copy(vname);
1822 DEBUG(D_acl) debug_printf_indent("Malware found, name \"%s\"\n", malware_name);
1825 else if (Ustrcmp(result_tag, "ERROR") == 0)
1826 return m_panic_defer(scanent, CUS callout_address,
1827 string_sprintf("ClamAV returned: %s", av_buffer));
1829 else if (Ustrcmp(result_tag, "OK") == 0)
1831 /* Everything should be OK */
1832 malware_name = NULL;
1833 DEBUG(D_acl) debug_printf_indent("Malware not found\n");
1837 return m_panic_defer(scanent, CUS callout_address,
1838 string_sprintf("unparseable response from ClamAV: {%s}", av_buffer));
1844 #ifndef DISABLE_MAL_SOCK
1845 case M_SOCK: /* "sock" scanner type ------------------------------------- */
1846 /* This code was derived by Martin Poole from the clamd code contributed
1847 by David Saez and the cmdline code
1851 uschar * commandline;
1852 uschar av_buffer[1024];
1853 uschar * linebuffer;
1854 uschar * sockline_scanner;
1855 uschar sockline_scanner_default[] = "%s\n";
1856 const pcre *sockline_trig_re;
1857 const pcre *sockline_name_re;
1859 /* find scanner command line */
1860 if ( (sockline_scanner = string_nextinlist(&av_scanner_work, &sep,
1862 && *sockline_scanner
1864 { /* check for no expansions apart from one %s */
1865 uschar * s = Ustrchr(sockline_scanner, '%');
1867 if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%'))
1868 return m_panic_defer_3(scanent, NULL,
1869 US"unsafe sock scanner call spec", malware_daemon_ctx.sock);
1872 sockline_scanner = sockline_scanner_default;
1873 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "cmdline: ",
1874 string_printing(sockline_scanner));
1876 /* find scanner output trigger */
1877 sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1878 "missing trigger specification", &errstr);
1879 if (!sockline_trig_re)
1880 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1882 /* find virus name regex */
1883 sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1884 "missing virus name regex specification", &errstr);
1885 if (!sockline_name_re)
1886 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1888 /* prepare scanner call - security depends on expansions check above */
1889 commandline = string_sprintf( CS sockline_scanner, CS eml_filename);
1890 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "expanded: ",
1891 string_printing(commandline));
1893 /* Pass the command string to the socket */
1894 if (m_sock_send(malware_daemon_ctx.sock, commandline, Ustrlen(commandline), &errstr) < 0)
1895 return m_panic_defer(scanent, CUS callout_address, errstr);
1897 /* Read the result */
1898 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1901 return m_panic_defer_3(scanent, CUS callout_address,
1902 string_sprintf("unable to read from socket (%s)", strerror(errno)),
1903 malware_daemon_ctx.sock);
1905 if (bread == sizeof(av_buffer))
1906 return m_panic_defer_3(scanent, CUS callout_address,
1907 US"buffer too small", malware_daemon_ctx.sock);
1908 av_buffer[bread] = '\0';
1909 linebuffer = string_copy(av_buffer);
1910 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "answer: ",
1911 string_printing(linebuffer));
1913 /* try trigger match */
1914 if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1))
1916 if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer)))
1917 malware_name = US "unknown";
1918 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "name: ",
1919 string_printing(malware_name));
1921 else /* no virus found */
1922 malware_name = NULL;
1927 #ifndef DISABLE_MAL_MKS
1928 case M_MKSD: /* "mksd" scanner type ------------------------------------- */
1930 char *mksd_options_end;
1931 int mksd_maxproc = 1; /* default, if no option supplied */
1934 if (scanner_options)
1936 mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10);
1937 if ( *scanner_options == '\0'
1938 || *mksd_options_end != '\0'
1940 || mksd_maxproc > 32
1942 return m_panic_defer(scanent, CUS callout_address,
1943 string_sprintf("invalid option '%s'", scanner_options));
1946 if((malware_daemon_ctx.sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0)
1947 return m_panic_defer(scanent, CUS callout_address, errstr);
1949 malware_name = NULL;
1951 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan\n", scanner_name);
1953 if ((retval = mksd_scan_packed(scanent, malware_daemon_ctx.sock, eml_filename, tmo)) != OK)
1955 close (malware_daemon_ctx.sock);
1962 #ifndef DISABLE_MAL_AVAST
1963 case M_AVAST: /* "avast" scanner type ----------------------------------- */
1966 uschar * scanrequest;
1967 enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage;
1969 uschar * error_message = NULL;
1970 BOOL more_data = FALSE;
1973 /* According to Martin Tuma @avast the protocol uses "escaped
1974 whitespace", that is, every embedded whitespace is backslash
1975 escaped, as well as backslash is protected by backslash.
1976 The returned lines contain the name of the scanned file, a tab
1980 [E] - some error occurred
1981 Such marker follows the first non-escaped TAB. For more information
1982 see avast-protocol(5)
1984 We observed two cases:
1986 <- /file [E]0.0 Error 13 Permission denied
1987 <- 451 SCAN Engine error 13 permission denied
1990 <- /file… [E]3.0 Error 41120 The file is a decompression bomb
1992 <- /file… [+]2.0 0 Eicar Test Virus!!!
1995 If the scanner returns 4xx, DEFER is a good decision, combined
1996 with a panic log entry, to get the admin's attention.
1998 If the scanner returns 200, we reject it as malware, if found any,
1999 or, in case of an error, we set the malware message to the error
2002 Some of the >= 42000 errors are message related - usually some
2003 broken archives etc, but some of them are e.g. license related.
2004 Once the license expires the engine starts returning errors for
2005 every scanning attempt. I¹ have the full list of the error codes
2006 but it is not a public API and is subject to change. It is hard
2007 for me to say what you should do in case of an engine error. You
2008 can have a “Treat * unscanned file as infection” policy or “Treat
2009 unscanned file as clean” policy. ¹) Jakub Bednar
2013 if ( ( !ava_re_clean
2014 && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr)))
2016 && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr)))
2018 && !(ava_re_error = m_pcre_compile(ava_re_error_str, &errstr)))
2020 return malware_panic_defer(errstr);
2022 /* wait for result */
2023 for (avast_stage = AVA_HELO;
2024 (nread = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) > 0;
2027 int slen = Ustrlen(buf);
2031 /* Multi line responses are bracketed between 210 … and nnn … */
2032 if (Ustrncmp(buf, "210", 3) == 0)
2037 else if (more_data && isdigit(buf[0])) more_data = 0;
2039 switch (avast_stage)
2042 if (more_data) continue;
2043 if (Ustrncmp(buf, "220", 3) != 0)
2044 goto endloop; /* require a 220 */
2048 if (more_data) continue;
2049 if (Ustrncmp(buf, "200", 3) != 0)
2050 goto endloop; /* require a 200 */
2055 /* Check for another option to send. Newline-terminate it. */
2056 if ((scanrequest = string_nextinlist(&av_scanner_work, &sep,
2059 if (Ustrcmp(scanrequest, "pass_unscanned") == 0)
2061 DEBUG(D_acl) debug_printf_indent("pass unscanned files as clean\n");
2065 scanrequest = string_sprintf("%s\n", scanrequest);
2066 avast_stage = AVA_OPT; /* just sent option */
2067 DEBUG(D_acl) debug_printf_indent("send to avast OPTION: %s", scanrequest);
2071 scanrequest = string_sprintf("SCAN %s\n", eml_dir);
2072 avast_stage = AVA_RSP; /* just sent command */
2073 DEBUG(D_acl) debug_printf_indent("send to avast REQUEST: SCAN %s\n", eml_dir);
2076 /* send config-cmd or scan-request to socket */
2077 len = Ustrlen(scanrequest);
2078 if (send(malware_daemon_ctx.sock, scanrequest, len, 0) == -1)
2080 scanrequest[len-1] = '\0';
2081 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
2082 "unable to send request '%s' to socket (%s): %s",
2083 scanrequest, scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2090 if (isdigit(buf[0])) /* We're done */
2093 if (malware_name) /* Nothing else matters, just read on */
2096 if (pcre_exec(ava_re_clean, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2099 if ((malware_name = m_pcre_exec(ava_re_virus, buf)))
2101 unescape(malware_name);
2103 debug_printf_indent("unescaped malware name: '%s'\n", malware_name);
2107 if (strict) /* treat scanner errors as malware */
2109 if ((malware_name = m_pcre_exec(ava_re_error, buf)))
2111 unescape(malware_name);
2113 debug_printf_indent("unescaped error message: '%s'\n", malware_name);
2117 else if (pcre_exec(ava_re_error, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2119 log_write(0, LOG_MAIN, "internal scanner error (ignored): %s", buf);
2123 /* here also for any unexpected response from the scanner */
2124 DEBUG(D_acl) debug_printf("avast response not handled: '%s'\n", buf);
2128 default: log_write(0, LOG_PANIC, "%s:%d:%s: should not happen",
2129 __FILE__, __LINE__, __FUNCTION__);
2136 if (nread == -1) error_message = US"EOF from scanner";
2137 else if (nread < 0) error_message = US"timeout from scanner";
2138 else if (nread == 0) error_message = US"got nothing from scanner";
2139 else if (buf[0] != '2') error_message = buf;
2141 DEBUG(D_acl) debug_printf_indent("sent to avast QUIT\n");
2142 if (send(malware_daemon_ctx.sock, "QUIT\n", 5, 0) == -1)
2143 return m_panic_defer_3(scanent, CUS callout_address,
2144 string_sprintf("unable to send quit request to socket (%s): %s",
2145 scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2148 return m_panic_defer_3(scanent, CUS callout_address, error_message, malware_daemon_ctx.sock);
2152 } /* scanner type switch */
2154 if (malware_daemon_ctx.sock >= 0)
2155 (void) close (malware_daemon_ctx.sock);
2156 malware_ok = TRUE; /* set "been here, done that" marker */
2159 /* match virus name against pattern (caseless ------->----------v) */
2160 if (malware_name && regex_match_and_setup(re, malware_name, 0, -1))
2162 DEBUG(D_acl) debug_printf_indent(
2163 "Matched regex to malware [%s] [%s]\n", malware_re, malware_name);
2171 /*************************************************
2172 * Scan an email for malware *
2173 *************************************************/
2175 /* This is the normal interface for scanning an email, which doesn't need a
2176 filename; it's a wrapper around the malware_file function.
2179 malware_re match condition for "malware="
2180 timeout if nonzero, timeout in seconds
2182 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2183 where true means malware was found (condition applies)
2186 malware(const uschar * malware_re, int timeout)
2188 int ret = malware_internal(malware_re, NULL, timeout);
2190 if (ret == DEFER) av_failed = TRUE;
2195 /*************************************************
2196 * Scan a file for malware *
2197 *************************************************/
2199 /* This is a test wrapper for scanning an email, which is not used in
2200 normal processing. Scan any file, using the Exim scanning interface.
2201 This function tampers with various global variables so is unsafe to use
2202 in any other context.
2205 eml_filename a file holding the message to be scanned
2207 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2208 where true means malware was found (condition applies)
2211 malware_in_file(uschar *eml_filename)
2213 uschar message_id_buf[64];
2216 /* spool_mbox() assumes various parameters exist, when creating
2217 the relevant directory and the email within */
2219 (void) string_format(message_id_buf, sizeof(message_id_buf),
2220 "dummy-%d", vaguely_random_number(INT_MAX));
2221 message_id = message_id_buf;
2222 sender_address = US"malware-sender@example.net";
2224 recipients_list = NULL;
2225 receive_add_recipient(US"malware-victim@example.net", -1);
2226 f.enable_dollar_recipients = TRUE;
2228 ret = malware_internal(US"*", eml_filename, 0);
2230 Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id));
2233 /* don't set no_mbox_unspool; at present, there's no way for it to become
2234 set, but if that changes, then it should apply to these tests too */
2238 /* silence static analysis tools */
2248 if (!malware_default_re)
2249 malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE);
2251 #ifndef DISABLE_MAL_DRWEB
2253 drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE);
2255 #ifndef DISABLE_MAL_FSECURE
2257 fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE);
2259 #ifndef DISABLE_MAL_KAV
2261 kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE);
2263 kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE);
2265 #ifndef DISABLE_MAL_AVAST
2267 ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE);
2269 ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE);
2271 ava_re_error = regex_must_compile(ava_re_error_str, FALSE, TRUE);
2273 #ifndef DISABLE_MAL_FFROT6D
2274 if (!fprot6d_re_error)
2275 fprot6d_re_error = regex_must_compile(fprot6d_re_error_str, FALSE, TRUE);
2276 if (!fprot6d_re_virus)
2277 fprot6d_re_virus = regex_must_compile(fprot6d_re_virus_str, FALSE, TRUE);
2283 malware_show_supported(FILE * f)
2285 fprintf(f, "Malware:");
2286 for (struct scan * sc = m_scans; sc->scancode != (scanner_t)-1; sc++) fprintf(f, " %s", sc->name);
2291 # endif /*!MACRO_PREDEF*/
2292 #endif /*WITH_CONTENT_SCAN*/