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 cre = pcre_compile(CS re, PCRE_COPT, (const char **)&rerror, &roffset, NULL);
307 *errstr= string_sprintf("regular expression error in '%s': %s at offset %d",
308 re, rerror, roffset);
313 m_pcre_exec(const pcre * cre, uschar * text)
316 int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0,
317 ovector, nelem(ovector));
318 uschar * substr = NULL;
319 if (i >= 2) /* Got it */
320 pcre_get_substring(CS text, ovector, i, 1, (const char **) &substr);
325 m_pcre_nextinlist(const uschar ** list, int * sep,
326 char * listerr, uschar ** errstr)
328 const uschar * list_ele;
329 const pcre * cre = NULL;
331 if (!(list_ele = string_nextinlist(list, sep, NULL, 0)))
332 *errstr = US listerr;
335 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "RE: ",
336 string_printing(list_ele));
337 cre = m_pcre_compile(CUS list_ele, errstr);
343 Simple though inefficient wrapper for reading a line. Drop CRs and the
344 trailing newline. Can return early on buffer full. Null-terminate.
345 Apply initial timeout if no data ready.
347 Return: number of chars - zero for an empty line
349 -2 on timeout or error
352 recv_line(int fd, uschar * buffer, int bsize, time_t tmo)
358 if (!fd_ready(fd, tmo))
361 /*XXX tmo handling assumes we always get a whole line */
364 while ((rcv = read(fd, p, 1)) > 0)
367 if (p-buffer > bsize-2) break;
368 if (*p == '\n') break;
373 DEBUG(D_acl) debug_printf_indent("Malware scan: read %s (%s)\n",
374 rcv==0 ? "EOF" : "error", strerror(errno));
375 return rcv==0 ? -1 : -2;
379 DEBUG(D_acl) debug_printf_indent("Malware scan: read '%s'\n", buffer);
383 /* return TRUE iff size as requested */
385 recv_len(int sock, void * buf, int size, time_t tmo)
387 return fd_ready(sock, tmo)
388 ? recv(sock, buf, size, 0) == size
394 #ifndef DISABLE_MAL_MKS
395 /* ============= private routines for the "mksd" scanner type ============== */
397 # include <sys/uio.h>
400 mksd_writev (int sock, struct iovec * iov, int iovcnt)
407 i = writev (sock, iov, iovcnt);
408 while (i < 0 && errno == EINTR);
411 (void) malware_panic_defer(
412 US"unable to write to mksd UNIX socket (/var/run/mksd/socket)");
415 for (;;) /* check for short write */
416 if (i >= iov->iov_len)
426 iov->iov_base = CS iov->iov_base + i;
433 mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, time_t tmo)
435 client_conn_ctx cctx = {.sock = sock};
441 i = ip_recv(&cctx, av_buffer+offset, av_buffer_size-offset, tmo);
444 (void) malware_panic_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)");
449 /* offset == av_buffer_size -> buffer full */
450 if (offset == av_buffer_size)
452 (void) malware_panic_defer(US"malformed reply received from mksd");
455 } while (av_buffer[offset-1] != '\n');
457 av_buffer[offset] = '\0';
462 mksd_parse_line(struct scan * scanent, char * line)
473 if ((p = strchr (line, '\n')) != NULL)
475 return m_panic_defer(scanent, NULL,
476 string_sprintf("scanner failed: %s", line));
479 if ((p = strchr (line, '\n')) != NULL)
484 && (p = strchr(line+4, ' ')) != NULL
489 malware_name = string_copy(US line+4);
493 return m_panic_defer(scanent, NULL,
494 string_sprintf("malformed reply received: %s", line));
499 mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename,
503 const char *cmd = "MSQ\n";
504 uschar av_buffer[1024];
506 iov[0].iov_base = (void *) cmd;
508 iov[1].iov_base = (void *) scan_filename;
509 iov[1].iov_len = Ustrlen(scan_filename);
510 iov[2].iov_base = (void *) (cmd + 3);
513 if (mksd_writev (sock, iov, 3) < 0)
516 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0)
519 return mksd_parse_line (scanent, CS av_buffer);
524 #ifndef DISABLE_MAL_CLAM
526 clamd_option(clamd_address * cd, const uschar * optstr, int * subsep)
531 while ((s = string_nextinlist(&optstr, subsep, NULL, 0)))
532 if (Ustrncmp(s, "retry=", 6) == 0)
534 int sec = readconf_readtime((s += 6), '\0', FALSE);
547 /*************************************************
548 * Scan content for malware *
549 *************************************************/
551 /* This is an internal interface for scanning an email; the normal interface
552 is via malware(), or there's malware_in_file() used for testing/debugging.
555 malware_re match condition for "malware="
556 scan_filename the file holding the email to be scanned, if we're faking
557 this up for the -bmalware test, else NULL
558 timeout if nonzero, non-default timeoutl
560 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
561 where true means malware was found (condition applies)
564 malware_internal(const uschar * malware_re, const uschar * scan_filename,
568 const uschar *av_scanner_work = av_scanner;
569 uschar *scanner_name;
570 unsigned long mbox_size;
574 struct scan * scanent;
575 const uschar * scanner_options;
576 client_conn_ctx malware_daemon_ctx = {.sock = -1};
578 uschar * eml_filename, * eml_dir;
581 return FAIL; /* empty means "don't match anything" */
583 /* Ensure the eml mbox file is spooled up */
585 if (!(mbox_file = spool_mbox(&mbox_size, scan_filename, &eml_filename)))
586 return malware_panic_defer(US"error while creating mbox spool file");
588 /* None of our current scanners need the mbox file as a stream (they use
589 the name), so we can close it right away. Get the directory too. */
591 (void) fclose(mbox_file);
592 eml_dir = string_copyn(eml_filename, Ustrrchr(eml_filename, '/') - eml_filename);
594 /* parse 1st option */
595 if (strcmpic(malware_re, US"false") == 0 || Ustrcmp(malware_re,"0") == 0)
596 return FAIL; /* explicitly no matching */
598 /* special cases (match anything except empty) */
599 if ( strcmpic(malware_re,US"true") == 0
600 || Ustrcmp(malware_re,"*") == 0
601 || Ustrcmp(malware_re,"1") == 0
604 if ( !malware_default_re
605 && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr)))
606 return malware_panic_defer(errstr);
607 malware_re = malware_regex_default;
608 re = malware_default_re;
611 /* compile the regex, see if it works */
612 else if (!(re = m_pcre_compile(malware_re, &errstr)))
613 return malware_panic_defer(errstr);
615 /* if av_scanner starts with a dollar, expand it first */
616 if (*av_scanner == '$')
618 if (!(av_scanner_work = expand_string(av_scanner)))
619 return malware_panic_defer(
620 string_sprintf("av_scanner starts with $, but expansion failed: %s",
621 expand_string_message));
624 debug_printf_indent("Expanded av_scanner global: %s\n", av_scanner_work);
625 /* disable result caching in this case */
630 /* Do not scan twice (unless av_scanner is dynamic). */
633 /* find the scanner type from the av_scanner option */
634 if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
635 return malware_panic_defer(US"av_scanner configuration variable is empty");
636 if (!timeout) timeout = MALWARE_TIMEOUT;
637 tmo = time(NULL) + timeout;
639 for (scanent = m_scans; ; scanent++)
642 return malware_panic_defer(string_sprintf("unknown scanner type '%s'",
644 if (strcmpic(scanner_name, US scanent->name) != 0)
646 DEBUG(D_acl) debug_printf_indent("Malware scan: %s tmo=%s\n",
647 scanner_name, readconf_printtime(timeout));
649 if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
650 scanner_options = scanent->options_default;
651 if (scanent->conn == MC_NONE)
654 DEBUG(D_acl) debug_printf_indent("%15s%10s%s\n", "", "socket: ", scanner_options);
655 switch(scanent->conn)
658 malware_daemon_ctx.sock = ip_tcpsocket(scanner_options, &errstr, 5); break;
660 malware_daemon_ctx.sock = ip_unixsocket(scanner_options, &errstr); break;
662 malware_daemon_ctx.sock = ip_streamsocket(scanner_options, &errstr, 5); break;
664 /* compiler quietening */ break;
666 if (malware_daemon_ctx.sock < 0)
667 return m_panic_defer(scanent, CUS callout_address, errstr);
671 switch (scanent->scancode)
673 #ifndef DISABLE_MAL_FFROTD
674 case M_FPROTD: /* "f-protd" scanner type -------------------------------- */
676 uschar *fp_scan_option;
677 unsigned int detected=0, par_count=0;
678 uschar * scanrequest;
679 uschar buf[32768], *strhelper, *strhelper2;
680 uschar * malware_name_internal = NULL;
683 scanrequest = string_sprintf("GET %s", eml_filename);
685 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
688 scanrequest = string_sprintf("%s%s%s", scanrequest,
689 par_count ? "%20" : "?", fp_scan_option);
692 scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest);
693 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
694 scanner_name, scanrequest);
696 /* send scan request */
697 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
698 return m_panic_defer(scanent, CUS callout_address, errstr);
700 while ((len = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) >= 0)
703 if (Ustrstr(buf, US"<detected type=\"") != NULL)
705 else if (detected && (strhelper = Ustrstr(buf, US"<name>")))
707 if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL)
710 malware_name_internal = string_copy(strhelper+6);
713 else if (Ustrstr(buf, US"<summary code=\""))
715 malware_name = Ustrstr(buf, US"<summary code=\"11\">")
716 ? malware_name_internal : NULL;
722 (void)close(malware_daemon_ctx.sock);
729 #ifndef DISABLE_MAL_FFROT6D
730 case M_FPROT6D: /* "f-prot6d" scanner type ----------------------------------- */
735 uschar * scanrequest;
736 uschar av_buffer[1024];
738 if ((!fprot6d_re_virus && !(fprot6d_re_virus = m_pcre_compile(fprot6d_re_virus_str, &errstr)))
739 || (!fprot6d_re_error && !(fprot6d_re_error = m_pcre_compile(fprot6d_re_error_str, &errstr))))
740 return malware_panic_defer(errstr);
742 scanrequest = string_sprintf("SCAN FILE %s\n", eml_filename);
743 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
744 scanner_name, scanrequest);
746 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest), &errstr) < 0)
747 return m_panic_defer(scanent, CUS callout_address, errstr);
749 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
752 return m_panic_defer_3(scanent, CUS callout_address,
753 string_sprintf("unable to read from socket (%s)", strerror(errno)),
754 malware_daemon_ctx.sock);
756 if (bread == sizeof(av_buffer))
757 return m_panic_defer_3(scanent, CUS callout_address,
758 US"buffer too small", malware_daemon_ctx.sock);
760 av_buffer[bread] = '\0';
761 linebuffer = string_copy(av_buffer);
763 m_sock_send(malware_daemon_ctx.sock, US"QUIT\n", 5, 0);
765 if ((e = m_pcre_exec(fprot6d_re_error, linebuffer)))
766 return m_panic_defer_3(scanent, CUS callout_address,
767 string_sprintf("scanner reported error (%s)", e), malware_daemon_ctx.sock);
769 if (!(malware_name = m_pcre_exec(fprot6d_re_virus, linebuffer)))
776 #ifndef DISABLE_MAL_DRWEB
777 case M_DRWEB: /* "drweb" scanner type ----------------------------------- */
778 /* v0.1 - added support for tcp sockets */
779 /* v0.0 - initial release -- support for unix sockets */
783 unsigned int fsize_uint;
784 uschar * tmpbuf, *drweb_fbuf;
785 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
786 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
788 /* prepare variables */
789 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
790 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
792 if (*scanner_options != '/')
795 if ((drweb_fd = open(CCS eml_filename, O_RDONLY)) == -1)
796 return m_panic_defer_3(scanent, NULL,
797 string_sprintf("can't open spool file %s: %s",
798 eml_filename, strerror(errno)),
799 malware_daemon_ctx.sock);
801 if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1)
804 badseek: err = errno;
805 (void)close(drweb_fd);
806 return m_panic_defer_3(scanent, NULL,
807 string_sprintf("can't seek spool file %s: %s",
808 eml_filename, strerror(err)),
809 malware_daemon_ctx.sock);
811 fsize_uint = (unsigned int) fsize;
812 if ((off_t)fsize_uint != fsize)
814 (void)close(drweb_fd);
815 return m_panic_defer_3(scanent, NULL,
816 string_sprintf("seeking spool file %s, size overflow",
818 malware_daemon_ctx.sock);
820 drweb_slen = htonl(fsize);
821 if (lseek(drweb_fd, 0, SEEK_SET) < 0)
824 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s remote scan [%s]\n",
825 scanner_name, scanner_options);
827 /* send scan request */
828 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
829 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
830 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
831 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0))
833 (void)close(drweb_fd);
834 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
835 "unable to send commands to socket (%s)", scanner_options),
836 malware_daemon_ctx.sock);
839 if (!(drweb_fbuf = store_malloc(fsize_uint)))
841 (void)close(drweb_fd);
842 return m_panic_defer_3(scanent, NULL,
843 string_sprintf("unable to allocate memory %u for file (%s)",
844 fsize_uint, eml_filename),
845 malware_daemon_ctx.sock);
848 if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1)
851 (void)close(drweb_fd);
852 store_free(drweb_fbuf);
853 return m_panic_defer_3(scanent, NULL,
854 string_sprintf("can't read spool file %s: %s",
855 eml_filename, strerror(err)),
856 malware_daemon_ctx.sock);
858 (void)close(drweb_fd);
860 /* send file body to socket */
861 if (send(malware_daemon_ctx.sock, drweb_fbuf, fsize, 0) < 0)
863 store_free(drweb_fbuf);
864 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
865 "unable to send file body to socket (%s)", scanner_options),
866 malware_daemon_ctx.sock);
868 store_free(drweb_fbuf);
872 drweb_slen = htonl(Ustrlen(eml_filename));
874 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s local scan [%s]\n",
875 scanner_name, scanner_options);
877 /* send scan request */
878 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
879 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
880 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
881 (send(malware_daemon_ctx.sock, eml_filename, Ustrlen(eml_filename), 0) < 0) ||
882 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0))
883 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
884 "unable to send commands to socket (%s)", scanner_options),
885 malware_daemon_ctx.sock);
888 /* wait for result */
889 if (!recv_len(malware_daemon_ctx.sock, &drweb_rc, sizeof(drweb_rc), tmo))
890 return m_panic_defer_3(scanent, CUS callout_address,
891 US"unable to read return code", malware_daemon_ctx.sock);
892 drweb_rc = ntohl(drweb_rc);
894 if (!recv_len(malware_daemon_ctx.sock, &drweb_vnum, sizeof(drweb_vnum), tmo))
895 return m_panic_defer_3(scanent, CUS callout_address,
896 US"unable to read the number of viruses", malware_daemon_ctx.sock);
897 drweb_vnum = ntohl(drweb_vnum);
899 /* "virus(es) found" if virus number is > 0 */
904 /* setup default virus name */
905 malware_name = US"unknown";
907 /* set up match regex */
909 drweb_re = m_pcre_compile(drweb_re_str, &errstr);
911 /* read and concatenate virus names into one string */
912 for (int i = 0; i < drweb_vnum; i++)
916 /* read the size of report */
917 if (!recv_len(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), tmo))
918 return m_panic_defer_3(scanent, CUS callout_address,
919 US"cannot read report size", malware_daemon_ctx.sock);
920 drweb_slen = ntohl(drweb_slen);
922 /* assume tainted, since it is external input */
923 tmpbuf = store_get(drweb_slen, TRUE);
925 /* read report body */
926 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, drweb_slen, tmo))
927 return m_panic_defer_3(scanent, CUS callout_address,
928 US"cannot read report string", malware_daemon_ctx.sock);
929 tmpbuf[drweb_slen] = '\0';
931 /* try matcher on the line, grab substring */
932 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0,
933 ovector, nelem(ovector));
936 const char * pre_malware_nb;
938 pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb);
940 if (i==0) /* the first name we just copy to malware_name */
941 g = string_cat(NULL, US pre_malware_nb);
943 /*XXX could be string_append_listele? */
944 else /* concatenate each new virus name to previous */
945 g = string_append(g, 2, "/", pre_malware_nb);
947 pcre_free_substring(pre_malware_nb);
950 malware_name = string_from_gstring(g);
954 const char *drweb_s = NULL;
956 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
957 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
958 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
959 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
960 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
961 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
962 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
963 * and others are ignored */
965 return m_panic_defer_3(scanent, CUS callout_address,
966 string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s),
967 malware_daemon_ctx.sock);
976 #ifndef DISABLE_MAL_AVE
977 case M_AVES: /* "aveserver" scanner type -------------------------------- */
982 /* read aveserver's greeting and see if it is ready (2xx greeting) */
984 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
986 if (buf[0] != '2') /* aveserver is having problems */
987 return m_panic_defer_3(scanent, CUS callout_address,
988 string_sprintf("unavailable (Responded: %s).",
989 ((buf[0] != 0) ? buf : US "nothing") ),
990 malware_daemon_ctx.sock);
992 /* prepare our command */
993 (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n",
997 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s %s\n",
999 if (m_sock_send(malware_daemon_ctx.sock, buf, Ustrlen(buf), &errstr) < 0)
1000 return m_panic_defer(scanent, CUS callout_address, errstr);
1002 malware_name = NULL;
1004 /* read response lines, find malware name and final response */
1005 while (recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo) > 0)
1009 if (buf[0] == '5') /* aveserver is having problems */
1011 result = m_panic_defer(scanent, CUS callout_address,
1012 string_sprintf("unable to scan file %s (Responded: %s).",
1013 eml_filename, buf));
1016 if (Ustrncmp(buf,"322",3) == 0)
1018 uschar *p = Ustrchr(&buf[4], ' ');
1020 malware_name = string_copy(&buf[4]);
1024 if (m_sock_send(malware_daemon_ctx.sock, US"quit\r\n", 6, &errstr) < 0)
1025 return m_panic_defer(scanent, CUS callout_address, errstr);
1027 /* read aveserver's greeting and see if it is ready (2xx greeting) */
1029 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
1031 if (buf[0] != '2') /* aveserver is having problems */
1032 return m_panic_defer_3(scanent, CUS callout_address,
1033 string_sprintf("unable to quit dialogue (Responded: %s).",
1034 ((buf[0] != 0) ? buf : US "nothing") ),
1035 malware_daemon_ctx.sock);
1037 if (result == DEFER)
1039 (void)close(malware_daemon_ctx.sock);
1046 #ifndef DISABLE_MAL_FSECURE
1047 case M_FSEC: /* "fsecure" scanner type ---------------------------------- */
1051 uschar av_buffer[1024];
1052 static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n",
1053 US"CONFIGURE\tTIMEOUT\t0\n",
1054 US"CONFIGURE\tMAXARCH\t5\n",
1055 US"CONFIGURE\tMIME\t1\n" };
1057 malware_name = NULL;
1059 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1060 scanner_name, scanner_options);
1062 memset(av_buffer, 0, sizeof(av_buffer));
1063 for (i = 0; i != nelem(cmdopt); i++)
1066 if (m_sock_send(malware_daemon_ctx.sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0)
1067 return m_panic_defer(scanent, CUS callout_address, errstr);
1069 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1070 if (bread > 0) av_buffer[bread]='\0';
1072 return m_panic_defer_3(scanent, CUS callout_address,
1073 string_sprintf("unable to read answer %d (%s)", i, strerror(errno)),
1074 malware_daemon_ctx.sock);
1075 for (int j = 0; j < bread; j++)
1076 if (av_buffer[j] == '\r' || av_buffer[j] == '\n')
1080 /* pass the mailfile to fsecure */
1081 file_name = string_sprintf("SCAN\t%s\n", eml_filename);
1083 if (m_sock_send(malware_daemon_ctx.sock, file_name, Ustrlen(file_name), &errstr) < 0)
1084 return m_panic_defer(scanent, CUS callout_address, errstr);
1087 /* todo also SUSPICION\t */
1089 fsec_re = m_pcre_compile(fsec_re_str, &errstr);
1091 /* read report, linewise. Apply a timeout as the Fsecure daemon
1092 sometimes wants an answer to "PING" but they won't tell us what */
1094 uschar * p = av_buffer;
1100 i = av_buffer+sizeof(av_buffer)-p;
1101 if ((bread= ip_recv(&malware_daemon_ctx, p, i-1, tmo)) < 0)
1102 return m_panic_defer_3(scanent, CUS callout_address,
1103 string_sprintf("unable to read result (%s)", strerror(errno)),
1104 malware_daemon_ctx.sock);
1106 for (p[bread] = '\0'; (q = Ustrchr(p, '\n')); p = q+1)
1110 /* Really search for virus again? */
1112 /* try matcher on the line, grab substring */
1113 malware_name = m_pcre_exec(fsec_re, p);
1115 if (Ustrstr(p, "OK\tScan ok."))
1119 /* copy down the trailing partial line then read another chunk */
1120 i = av_buffer+sizeof(av_buffer)-p;
1121 memmove(av_buffer, p, i);
1131 #ifndef DISABLE_MAL_KAV
1132 case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */
1135 uschar tmpbuf[1024];
1136 uschar * scanrequest;
1138 unsigned long kav_reportlen;
1143 /* get current date and time, build scan request */
1145 /* pdp note: before the eml_filename parameter, this scanned the
1146 directory; not finding documentation, so we'll strip off the directory.
1147 The side-effect is that the test framework scanning may end up in
1148 scanning more than was requested, but for the normal interface, this is
1151 strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t));
1152 scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename);
1153 p = Ustrrchr(scanrequest, '/');
1157 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1158 scanner_name, scanner_options);
1160 /* send scan request */
1161 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
1162 return m_panic_defer(scanent, CUS callout_address, errstr);
1164 /* wait for result */
1165 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, 2, tmo))
1166 return m_panic_defer_3(scanent, CUS callout_address,
1167 US"unable to read 2 bytes from socket.", malware_daemon_ctx.sock);
1169 /* get errorcode from one nibble */
1170 kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F;
1173 case 5: case 6: /* improper kavdaemon configuration */
1174 return m_panic_defer_3(scanent, CUS callout_address,
1175 US"please reconfigure kavdaemon to NOT disinfect or remove infected files.",
1176 malware_daemon_ctx.sock);
1178 return m_panic_defer_3(scanent, CUS callout_address,
1179 US"reported 'scanning not completed' (code 1).", malware_daemon_ctx.sock);
1181 return m_panic_defer_3(scanent, CUS callout_address,
1182 US"reported 'kavdaemon damaged' (code 7).", malware_daemon_ctx.sock);
1185 /* code 8 is not handled, since it is ambiguous. It appears mostly on
1186 bounces where part of a file has been cut off */
1188 /* "virus found" return codes (2-4) */
1189 if (kav_rc > 1 && kav_rc < 5)
1191 int report_flag = 0;
1193 /* setup default virus name */
1194 malware_name = US"unknown";
1196 report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ];
1198 /* read the report, if available */
1199 if (report_flag == 1)
1201 /* read report size */
1202 if (!recv_len(malware_daemon_ctx.sock, &kav_reportlen, 4, tmo))
1203 return m_panic_defer_3(scanent, CUS callout_address,
1204 US"cannot read report size", malware_daemon_ctx.sock);
1206 /* it's possible that avp returns av_buffer[1] == 1 but the
1207 reportsize is 0 (!?) */
1208 if (kav_reportlen > 0)
1210 /* set up match regex, depends on retcode */
1213 if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr);
1214 kav_re = kav_re_sus;
1218 if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr);
1219 kav_re = kav_re_inf;
1222 /* read report, linewise. Using size from stream to read amount of data
1223 from same stream is safe enough. */
1224 /* coverity[tainted_data] */
1225 while (kav_reportlen > 0)
1227 if ((bread = recv_line(malware_daemon_ctx.sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0)
1229 kav_reportlen -= bread+1;
1231 /* try matcher on the line, grab substring */
1232 if ((malware_name = m_pcre_exec(kav_re, tmpbuf)))
1238 else /* no virus found */
1239 malware_name = NULL;
1245 #ifndef DISABLE_MAL_CMDLINE
1246 case M_CMDL: /* "cmdline" scanner type ---------------------------------- */
1248 const uschar *cmdline_scanner = scanner_options;
1249 const pcre *cmdline_trigger_re;
1250 const pcre *cmdline_regex_re;
1252 uschar * commandline;
1253 void (*eximsigchld)(int);
1254 void (*eximsigpipe)(int);
1255 FILE *scanner_out = NULL;
1257 FILE *scanner_record = NULL;
1258 uschar linebuffer[32767];
1263 if (!cmdline_scanner)
1264 return m_panic_defer(scanent, NULL, errstr);
1266 /* find scanner output trigger */
1267 cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1268 "missing trigger specification", &errstr);
1269 if (!cmdline_trigger_re)
1270 return m_panic_defer(scanent, NULL, errstr);
1272 /* find scanner name regex */
1273 cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1274 "missing virus name regex specification", &errstr);
1275 if (!cmdline_regex_re)
1276 return m_panic_defer(scanent, NULL, errstr);
1278 /* prepare scanner call; despite the naming, file_name holds a directory
1279 name which is documented as the value given to %s. */
1281 file_name = string_copy(eml_filename);
1282 p = Ustrrchr(file_name, '/');
1285 commandline = string_sprintf(CS cmdline_scanner, file_name);
1287 /* redirect STDERR too */
1288 commandline = string_sprintf("%s 2>&1", commandline);
1290 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1291 scanner_name, commandline);
1293 /* store exims signal handlers */
1294 eximsigchld = signal(SIGCHLD,SIG_DFL);
1295 eximsigpipe = signal(SIGPIPE,SIG_DFL);
1297 if (!(scanner_out = popen(CS commandline,"r")))
1300 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1301 return m_panic_defer(scanent, NULL,
1302 string_sprintf("call (%s) failed: %s.", commandline, strerror(err)));
1304 scanner_fd = fileno(scanner_out);
1306 file_name = string_sprintf("%s/%s_scanner_output", eml_dir, message_id);
1308 if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE)))
1311 (void) pclose(scanner_out);
1312 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1313 return m_panic_defer(scanent, NULL, string_sprintf(
1314 "opening scanner output file (%s) failed: %s.",
1315 file_name, strerror(err)));
1318 /* look for trigger while recording output */
1319 while ((rcnt = recv_line(scanner_fd, linebuffer,
1320 sizeof(linebuffer), tmo)))
1327 (void) pclose(scanner_out);
1328 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1329 return m_panic_defer(scanent, NULL, string_sprintf(
1330 "unable to read from scanner (%s): %s",
1331 commandline, strerror(err)));
1334 if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record))
1337 (void) pclose(scanner_out);
1338 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1339 return m_panic_defer(scanent, NULL, string_sprintf(
1340 "short write on scanner output file (%s).", file_name));
1342 putc('\n', scanner_record);
1343 /* try trigger match */
1345 && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)
1350 (void)fclose(scanner_record);
1351 sep = pclose(scanner_out);
1352 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1354 return m_panic_defer(scanent, NULL,
1356 ? string_sprintf("running scanner failed: %s", strerror(sep))
1357 : string_sprintf("scanner returned error code: %d", sep));
1362 /* setup default virus name */
1363 malware_name = US"unknown";
1365 /* re-open the scanner output file, look for name match */
1366 scanner_record = fopen(CS file_name, "rb");
1367 while (fgets(CS linebuffer, sizeof(linebuffer), scanner_record))
1370 if ((s = m_pcre_exec(cmdline_regex_re, linebuffer)))
1373 (void)fclose(scanner_record);
1375 else /* no virus found */
1376 malware_name = NULL;
1381 #ifndef DISABLE_MAL_SOPHIE
1382 case M_SOPHIE: /* "sophie" scanner type --------------------------------- */
1387 uschar av_buffer[1024];
1389 /* pass the scan directory to sophie */
1390 file_name = string_copy(eml_filename);
1391 if ((p = Ustrrchr(file_name, '/')))
1394 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1395 scanner_name, scanner_options);
1397 if ( write(malware_daemon_ctx.sock, file_name, Ustrlen(file_name)) < 0
1398 || write(malware_daemon_ctx.sock, "\n", 1) != 1
1400 return m_panic_defer_3(scanent, CUS callout_address,
1401 string_sprintf("unable to write to UNIX socket (%s)", scanner_options),
1402 malware_daemon_ctx.sock);
1404 /* wait for result */
1405 memset(av_buffer, 0, sizeof(av_buffer));
1406 if ((bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo)) <= 0)
1407 return m_panic_defer_3(scanent, CUS callout_address,
1408 string_sprintf("unable to read from UNIX socket (%s)", scanner_options),
1409 malware_daemon_ctx.sock);
1412 if (av_buffer[0] == '1') {
1413 uschar * s = Ustrchr(av_buffer, '\n');
1416 malware_name = string_copy(&av_buffer[2]);
1418 else if (!strncmp(CS av_buffer, "-1", 2))
1419 return m_panic_defer_3(scanent, CUS callout_address,
1420 US"scanner reported error", malware_daemon_ctx.sock);
1421 else /* all ok, no virus */
1422 malware_name = NULL;
1428 #ifndef DISABLE_MAL_CLAM
1429 case M_CLAMD: /* "clamd" scanner type ----------------------------------- */
1431 /* This code was originally contributed by David Saez */
1432 /* There are three scanning methods available to us:
1433 * (1) Use the SCAN command, pointing to a file in the filesystem
1434 * (2) Use the STREAM command, send the data on a separate port
1435 * (3) Use the zINSTREAM command, send the data inline
1436 * The zINSTREAM command was introduced with ClamAV 0.95, which marked
1437 * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095
1438 * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that
1439 * the TCP-connected daemon is actually local; otherwise we use zINSTREAM
1440 * See Exim bug 926 for details. */
1442 uschar *p, *vname, *result_tag;
1444 uschar av_buffer[1024];
1445 uschar *hostname = US"";
1447 uschar *clamav_fbuf;
1448 int clam_fd, result;
1450 unsigned int fsize_uint;
1451 BOOL use_scan_command = FALSE;
1452 clamd_address * cv[MAX_CLAMD_SERVERS];
1453 int num_servers = 0;
1454 uint32_t send_size, send_final_zeroblock;
1457 /*XXX if unixdomain socket, only one server supported. Needs fixing;
1458 there's no reason we should not mix local and remote servers */
1460 if (*scanner_options == '/')
1463 const uschar * sublist;
1466 /* Local file; so we def want to use_scan_command and don't want to try
1467 * passing IP/port combinations */
1468 use_scan_command = TRUE;
1469 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1471 /* extract socket-path part */
1472 sublist = scanner_options;
1473 cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0);
1476 if (clamd_option(cd, sublist, &subsep) != OK)
1477 return m_panic_defer(scanent, NULL,
1478 string_sprintf("bad option '%s'", scanner_options));
1483 /* Go through the rest of the list of host/port and construct an array
1484 * of servers to try. The first one is the bit we just passed from
1485 * scanner_options so process that first and then scan the remainder of
1486 * the address buffer */
1490 const uschar * sublist;
1494 /* The 'local' option means use the SCAN command over the network
1495 * socket (ie common file storage in use) */
1496 /*XXX we could accept this also as a local option? */
1497 if (strcmpic(scanner_options, US"local") == 0)
1499 use_scan_command = TRUE;
1503 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1505 /* extract host and port part */
1506 sublist = scanner_options;
1507 if (!(cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0)))
1509 (void) m_panic_defer(scanent, NULL,
1510 string_sprintf("missing address: '%s'", scanner_options));
1513 if (!(s = string_nextinlist(&sublist, &subsep, NULL, 0)))
1515 (void) m_panic_defer(scanent, NULL,
1516 string_sprintf("missing port: '%s'", scanner_options));
1519 cd->tcp_port = atoi(CS s);
1522 /*XXX should these options be common over scanner types? */
1523 if (clamd_option(cd, sublist, &subsep) != OK)
1524 return m_panic_defer(scanent, NULL,
1525 string_sprintf("bad option '%s'", scanner_options));
1527 cv[num_servers++] = cd;
1528 if (num_servers >= MAX_CLAMD_SERVERS)
1530 (void) m_panic_defer(scanent, NULL,
1531 US"More than " MAX_CLAMD_SERVERS_S " clamd servers "
1532 "specified; only using the first " MAX_CLAMD_SERVERS_S );
1535 } while ((scanner_options = string_nextinlist(&av_scanner_work, &sep,
1538 /* check if we have at least one server */
1540 return m_panic_defer(scanent, NULL,
1541 US"no useable server addresses in malware configuration option.");
1544 /* See the discussion of response formats below to see why we really
1545 don't like colons in filenames when passing filenames to ClamAV. */
1546 if (use_scan_command && Ustrchr(eml_filename, ':'))
1547 return m_panic_defer(scanent, NULL,
1548 string_sprintf("local/SCAN mode incompatible with" \
1549 " : in path to email filename [%s]", eml_filename));
1551 /* Set up the very first data we will be sending */
1552 if (!use_scan_command)
1553 { cmd_str.data = US"zINSTREAM"; cmd_str.len = 10; }
1556 cmd_str.data = string_sprintf("SCAN %s\n", eml_filename);
1557 cmd_str.len = Ustrlen(cmd_str.data);
1560 /* We have some network servers specified */
1563 /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd
1564 * only supports AF_INET, but we should probably be looking to the
1565 * future and rewriting this to be protocol-independent anyway. */
1567 while (num_servers > 0)
1569 int i = random_number(num_servers);
1570 clamd_address * cd = cv[i];
1572 DEBUG(D_acl) debug_printf_indent("trying server name %s, port %u\n",
1573 cd->hostspec, cd->tcp_port);
1575 /* Lookup the host. This is to ensure that we connect to the same IP
1576 * on both connections (as one host could resolve to multiple ips) */
1579 /*XXX we trust that the cmd_str is ideempotent */
1580 if ((malware_daemon_ctx.sock = m_tcpsocket(cd->hostspec, cd->tcp_port,
1581 &connhost, &errstr, &cmd_str)) >= 0)
1583 /* Connection successfully established with a server */
1584 hostname = cd->hostspec;
1588 if (cd->retry <= 0) break;
1589 while (cd->retry > 0) cd->retry = sleep(cd->retry);
1591 if (malware_daemon_ctx.sock >= 0)
1594 (void) m_panic_defer(scanent, CUS callout_address, errstr);
1596 /* Remove the server from the list. XXX We should free the memory */
1598 for (; i < num_servers; i++)
1602 if (num_servers == 0)
1603 return m_panic_defer(scanent, NULL, US"all servers failed");
1608 if ((malware_daemon_ctx.sock = ip_unixsocket(cv[0]->hostspec, &errstr)) >= 0)
1610 hostname = cv[0]->hostspec;
1613 if (cv[0]->retry <= 0)
1614 return m_panic_defer(scanent, CUS callout_address, errstr);
1615 while (cv[0]->retry > 0) cv[0]->retry = sleep(cv[0]->retry);
1618 /* have socket in variable "sock"; command to use is semi-independent of
1619 * the socket protocol. We use SCAN if is local (either Unix/local
1620 * domain socket, or explicitly told local) else we stream the data.
1621 * How we stream the data depends upon how we were built. */
1623 if (!use_scan_command)
1625 /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data>
1626 chunks, <n> a 4-byte number (network order), terminated by a zero-length
1629 DEBUG(D_acl) debug_printf_indent(
1630 "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n",
1633 /* Pass the string to ClamAV (10 = "zINSTREAM\0"), if not already sent */
1635 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1636 return m_panic_defer_3(scanent, CUS hostname,
1637 string_sprintf("unable to send zINSTREAM to socket (%s)",
1639 malware_daemon_ctx.sock);
1641 /* calc file size */
1642 if ((clam_fd = open(CS eml_filename, O_RDONLY)) < 0)
1645 return m_panic_defer_3(scanent, NULL,
1646 string_sprintf("can't open spool file %s: %s",
1647 eml_filename, strerror(err)),
1648 malware_daemon_ctx.sock);
1650 if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0)
1653 b_seek: err = errno;
1654 (void)close(clam_fd);
1655 return m_panic_defer_3(scanent, NULL,
1656 string_sprintf("can't seek spool file %s: %s",
1657 eml_filename, strerror(err)),
1658 malware_daemon_ctx.sock);
1660 fsize_uint = (unsigned int) fsize;
1661 if ((off_t)fsize_uint != fsize)
1663 (void)close(clam_fd);
1664 return m_panic_defer_3(scanent, NULL,
1665 string_sprintf("seeking spool file %s, size overflow",
1667 malware_daemon_ctx.sock);
1669 if (lseek(clam_fd, 0, SEEK_SET) < 0)
1672 if (!(clamav_fbuf = store_malloc(fsize_uint)))
1674 (void)close(clam_fd);
1675 return m_panic_defer_3(scanent, NULL,
1676 string_sprintf("unable to allocate memory %u for file (%s)",
1677 fsize_uint, eml_filename),
1678 malware_daemon_ctx.sock);
1681 if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0)
1684 store_free(clamav_fbuf); (void)close(clam_fd);
1685 return m_panic_defer_3(scanent, NULL,
1686 string_sprintf("can't read spool file %s: %s",
1687 eml_filename, strerror(err)),
1688 malware_daemon_ctx.sock);
1690 (void)close(clam_fd);
1692 /* send file body to socket */
1693 send_size = htonl(fsize_uint);
1694 send_final_zeroblock = 0;
1695 if ((send(malware_daemon_ctx.sock, &send_size, sizeof(send_size), 0) < 0) ||
1696 (send(malware_daemon_ctx.sock, clamav_fbuf, fsize_uint, 0) < 0) ||
1697 (send(malware_daemon_ctx.sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0))
1699 store_free(clamav_fbuf);
1700 return m_panic_defer_3(scanent, NULL,
1701 string_sprintf("unable to send file body to socket (%s)", hostname),
1702 malware_daemon_ctx.sock);
1704 store_free(clamav_fbuf);
1707 { /* use scan command */
1708 /* Send a SCAN command pointing to a filename; then in the then in the
1709 * scan-method-neutral part, read the response back */
1711 /* ================================================================= */
1713 /* Prior to the reworking post-Exim-4.72, this scanned a directory,
1714 which dates to when ClamAV needed us to break apart the email into the
1715 MIME parts (eg, with the now deprecated demime condition coming first).
1716 Some time back, ClamAV gained the ability to deconstruct the emails, so
1717 doing this would actually have resulted in the mail attachments being
1718 scanned twice, in the broken out files and from the original .eml.
1719 Since ClamAV now handles emails (and has for quite some time) we can
1720 just use the email file itself. */
1721 /* Pass the string to ClamAV (7 = "SCAN \n" + \0), if not already sent */
1723 DEBUG(D_acl) debug_printf_indent(
1724 "Malware scan: issuing %s local-path scan [%s]\n",
1725 scanner_name, scanner_options);
1728 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1729 return m_panic_defer_3(scanent, CUS callout_address,
1730 string_sprintf("unable to write to socket (%s)", strerror(errno)),
1731 malware_daemon_ctx.sock);
1733 /* Do not shut down the socket for writing; a user report noted that
1734 * clamd 0.70 does not react well to this. */
1736 /* Commands have been sent, no matter which scan method or connection
1737 * type we're using; now just read the result, independent of method. */
1739 /* Read the result */
1740 memset(av_buffer, 0, sizeof(av_buffer));
1741 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1742 (void)close(malware_daemon_ctx.sock);
1743 malware_daemon_ctx.sock = -1;
1744 malware_daemon_ctx.tls_ctx = NULL;
1747 return m_panic_defer(scanent, CUS callout_address,
1748 string_sprintf("unable to read from socket (%s)",
1749 errno == 0 ? "EOF" : strerror(errno)));
1751 if (bread == sizeof(av_buffer))
1752 return m_panic_defer(scanent, CUS callout_address,
1753 US"buffer too small");
1754 /* We're now assured of a NULL at the end of av_buffer */
1756 /* Check the result. ClamAV returns one of two result formats.
1757 In the basic mode, the response is of the form:
1758 infected: -> "<filename>: <virusname> FOUND"
1759 not-infected: -> "<filename>: OK"
1760 error: -> "<filename>: <errcode> ERROR
1761 If the ExtendedDetectionInfo option has been turned on, then we get:
1762 "<filename>: <virusname>(<virushash>:<virussize>) FOUND"
1763 for the infected case. Compare:
1764 /tmp/eicar.com: Eicar-Test-Signature FOUND
1765 /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND
1767 In the streaming case, clamd uses the filename "stream" which you should
1768 be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The
1769 client app will replace "stream" with the original filename before returning
1770 results to stdout, but the trace shows the data).
1772 We will assume that the pathname passed to clamd from Exim does not contain
1773 a colon. We will have whined loudly above if the eml_filename does (and we're
1774 passing a filename to clamd). */
1777 return m_panic_defer(scanent, CUS callout_address,
1778 US"ClamAV returned null");
1780 /* strip newline at the end (won't be present for zINSTREAM)
1781 (also any trailing whitespace, which shouldn't exist, but we depend upon
1782 this below, so double-check) */
1783 p = av_buffer + Ustrlen(av_buffer) - 1;
1784 if (*p == '\n') *p = '\0';
1786 DEBUG(D_acl) debug_printf_indent("Malware response: %s\n", av_buffer);
1788 while (isspace(*--p) && (p > av_buffer))
1792 /* colon in returned output? */
1793 if(!(p = Ustrchr(av_buffer,':')))
1794 return m_panic_defer(scanent, CUS callout_address, string_sprintf(
1795 "ClamAV returned malformed result (missing colon): %s",
1798 /* strip filename */
1799 while (*p && isspace(*++p)) /**/;
1802 /* It would be bad to encounter a virus with "FOUND" in part of the name,
1803 but we should at least be resistant to it. */
1804 p = Ustrrchr(vname, ' ');
1805 result_tag = p ? p+1 : vname;
1807 if (Ustrcmp(result_tag, "FOUND") == 0)
1809 /* p should still be the whitespace before the result_tag */
1810 while (isspace(*p)) --p;
1812 /* Strip off the extended information too, which will be in parens
1813 after the virus name, with no intervening whitespace. */
1816 /* "(hash:size)", so previous '(' will do; if not found, we have
1817 a curious virus name, but not an error. */
1818 p = Ustrrchr(vname, '(');
1822 malware_name = string_copy(vname);
1823 DEBUG(D_acl) debug_printf_indent("Malware found, name \"%s\"\n", malware_name);
1826 else if (Ustrcmp(result_tag, "ERROR") == 0)
1827 return m_panic_defer(scanent, CUS callout_address,
1828 string_sprintf("ClamAV returned: %s", av_buffer));
1830 else if (Ustrcmp(result_tag, "OK") == 0)
1832 /* Everything should be OK */
1833 malware_name = NULL;
1834 DEBUG(D_acl) debug_printf_indent("Malware not found\n");
1838 return m_panic_defer(scanent, CUS callout_address,
1839 string_sprintf("unparseable response from ClamAV: {%s}", av_buffer));
1845 #ifndef DISABLE_MAL_SOCK
1846 case M_SOCK: /* "sock" scanner type ------------------------------------- */
1847 /* This code was derived by Martin Poole from the clamd code contributed
1848 by David Saez and the cmdline code
1852 uschar * commandline;
1853 uschar av_buffer[1024];
1854 uschar * linebuffer;
1855 uschar * sockline_scanner;
1856 uschar sockline_scanner_default[] = "%s\n";
1857 const pcre *sockline_trig_re;
1858 const pcre *sockline_name_re;
1860 /* find scanner command line */
1861 if ( (sockline_scanner = string_nextinlist(&av_scanner_work, &sep,
1863 && *sockline_scanner
1865 { /* check for no expansions apart from one %s */
1866 uschar * s = Ustrchr(sockline_scanner, '%');
1868 if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%'))
1869 return m_panic_defer_3(scanent, NULL,
1870 US"unsafe sock scanner call spec", malware_daemon_ctx.sock);
1873 sockline_scanner = sockline_scanner_default;
1874 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "cmdline: ",
1875 string_printing(sockline_scanner));
1877 /* find scanner output trigger */
1878 sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1879 "missing trigger specification", &errstr);
1880 if (!sockline_trig_re)
1881 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1883 /* find virus name regex */
1884 sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1885 "missing virus name regex specification", &errstr);
1886 if (!sockline_name_re)
1887 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1889 /* prepare scanner call - security depends on expansions check above */
1890 commandline = string_sprintf( CS sockline_scanner, CS eml_filename);
1891 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "expanded: ",
1892 string_printing(commandline));
1894 /* Pass the command string to the socket */
1895 if (m_sock_send(malware_daemon_ctx.sock, commandline, Ustrlen(commandline), &errstr) < 0)
1896 return m_panic_defer(scanent, CUS callout_address, errstr);
1898 /* Read the result */
1899 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1902 return m_panic_defer_3(scanent, CUS callout_address,
1903 string_sprintf("unable to read from socket (%s)", strerror(errno)),
1904 malware_daemon_ctx.sock);
1906 if (bread == sizeof(av_buffer))
1907 return m_panic_defer_3(scanent, CUS callout_address,
1908 US"buffer too small", malware_daemon_ctx.sock);
1909 av_buffer[bread] = '\0';
1910 linebuffer = string_copy(av_buffer);
1911 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "answer: ",
1912 string_printing(linebuffer));
1914 /* try trigger match */
1915 if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1))
1917 if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer)))
1918 malware_name = US "unknown";
1919 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "name: ",
1920 string_printing(malware_name));
1922 else /* no virus found */
1923 malware_name = NULL;
1928 #ifndef DISABLE_MAL_MKS
1929 case M_MKSD: /* "mksd" scanner type ------------------------------------- */
1931 char *mksd_options_end;
1932 int mksd_maxproc = 1; /* default, if no option supplied */
1935 if (scanner_options)
1937 mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10);
1938 if ( *scanner_options == '\0'
1939 || *mksd_options_end != '\0'
1941 || mksd_maxproc > 32
1943 return m_panic_defer(scanent, CUS callout_address,
1944 string_sprintf("invalid option '%s'", scanner_options));
1947 if((malware_daemon_ctx.sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0)
1948 return m_panic_defer(scanent, CUS callout_address, errstr);
1950 malware_name = NULL;
1952 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan\n", scanner_name);
1954 if ((retval = mksd_scan_packed(scanent, malware_daemon_ctx.sock, eml_filename, tmo)) != OK)
1956 close (malware_daemon_ctx.sock);
1963 #ifndef DISABLE_MAL_AVAST
1964 case M_AVAST: /* "avast" scanner type ----------------------------------- */
1967 uschar * scanrequest;
1968 enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage;
1970 uschar * error_message = NULL;
1971 BOOL more_data = FALSE;
1974 /* According to Martin Tuma @avast the protocol uses "escaped
1975 whitespace", that is, every embedded whitespace is backslash
1976 escaped, as well as backslash is protected by backslash.
1977 The returned lines contain the name of the scanned file, a tab
1981 [E] - some error occurred
1982 Such marker follows the first non-escaped TAB. For more information
1983 see avast-protocol(5)
1985 We observed two cases:
1987 <- /file [E]0.0 Error 13 Permission denied
1988 <- 451 SCAN Engine error 13 permission denied
1991 <- /file… [E]3.0 Error 41120 The file is a decompression bomb
1993 <- /file… [+]2.0 0 Eicar Test Virus!!!
1996 If the scanner returns 4xx, DEFER is a good decision, combined
1997 with a panic log entry, to get the admin's attention.
1999 If the scanner returns 200, we reject it as malware, if found any,
2000 or, in case of an error, we set the malware message to the error
2003 Some of the >= 42000 errors are message related - usually some
2004 broken archives etc, but some of them are e.g. license related.
2005 Once the license expires the engine starts returning errors for
2006 every scanning attempt. I¹ have the full list of the error codes
2007 but it is not a public API and is subject to change. It is hard
2008 for me to say what you should do in case of an engine error. You
2009 can have a “Treat * unscanned file as infection” policy or “Treat
2010 unscanned file as clean” policy. ¹) Jakub Bednar
2014 if ( ( !ava_re_clean
2015 && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr)))
2017 && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr)))
2019 && !(ava_re_error = m_pcre_compile(ava_re_error_str, &errstr)))
2021 return malware_panic_defer(errstr);
2023 /* wait for result */
2024 for (avast_stage = AVA_HELO;
2025 (nread = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) > 0;
2028 int slen = Ustrlen(buf);
2032 /* Multi line responses are bracketed between 210 … and nnn … */
2033 if (Ustrncmp(buf, "210", 3) == 0)
2038 else if (more_data && isdigit(buf[0])) more_data = 0;
2040 switch (avast_stage)
2043 if (more_data) continue;
2044 if (Ustrncmp(buf, "220", 3) != 0)
2045 goto endloop; /* require a 220 */
2049 if (more_data) continue;
2050 if (Ustrncmp(buf, "200", 3) != 0)
2051 goto endloop; /* require a 200 */
2056 /* Check for another option to send. Newline-terminate it. */
2057 if ((scanrequest = string_nextinlist(&av_scanner_work, &sep,
2060 if (Ustrcmp(scanrequest, "pass_unscanned") == 0)
2062 DEBUG(D_acl) debug_printf_indent("pass unscanned files as clean\n");
2066 scanrequest = string_sprintf("%s\n", scanrequest);
2067 avast_stage = AVA_OPT; /* just sent option */
2068 DEBUG(D_acl) debug_printf_indent("send to avast OPTION: %s", scanrequest);
2072 scanrequest = string_sprintf("SCAN %s\n", eml_dir);
2073 avast_stage = AVA_RSP; /* just sent command */
2074 DEBUG(D_acl) debug_printf_indent("send to avast REQUEST: SCAN %s\n", eml_dir);
2077 /* send config-cmd or scan-request to socket */
2078 len = Ustrlen(scanrequest);
2079 if (send(malware_daemon_ctx.sock, scanrequest, len, 0) == -1)
2081 scanrequest[len-1] = '\0';
2082 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
2083 "unable to send request '%s' to socket (%s): %s",
2084 scanrequest, scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2091 if (isdigit(buf[0])) /* We're done */
2094 if (malware_name) /* Nothing else matters, just read on */
2097 if (pcre_exec(ava_re_clean, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2100 if ((malware_name = m_pcre_exec(ava_re_virus, buf)))
2102 unescape(malware_name);
2104 debug_printf_indent("unescaped malware name: '%s'\n", malware_name);
2108 if (strict) /* treat scanner errors as malware */
2110 if ((malware_name = m_pcre_exec(ava_re_error, buf)))
2112 unescape(malware_name);
2114 debug_printf_indent("unescaped error message: '%s'\n", malware_name);
2118 else if (pcre_exec(ava_re_error, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2120 log_write(0, LOG_MAIN, "internal scanner error (ignored): %s", buf);
2124 /* here also for any unexpected response from the scanner */
2125 DEBUG(D_acl) debug_printf("avast response not handled: '%s'\n", buf);
2129 default: log_write(0, LOG_PANIC, "%s:%d:%s: should not happen",
2130 __FILE__, __LINE__, __FUNCTION__);
2137 if (nread == -1) error_message = US"EOF from scanner";
2138 else if (nread < 0) error_message = US"timeout from scanner";
2139 else if (nread == 0) error_message = US"got nothing from scanner";
2140 else if (buf[0] != '2') error_message = buf;
2142 DEBUG(D_acl) debug_printf_indent("sent to avast QUIT\n");
2143 if (send(malware_daemon_ctx.sock, "QUIT\n", 5, 0) == -1)
2144 return m_panic_defer_3(scanent, CUS callout_address,
2145 string_sprintf("unable to send quit request to socket (%s): %s",
2146 scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2149 return m_panic_defer_3(scanent, CUS callout_address, error_message, malware_daemon_ctx.sock);
2153 } /* scanner type switch */
2155 if (malware_daemon_ctx.sock >= 0)
2156 (void) close (malware_daemon_ctx.sock);
2157 malware_ok = TRUE; /* set "been here, done that" marker */
2160 /* match virus name against pattern (caseless ------->----------v) */
2161 if (malware_name && regex_match_and_setup(re, malware_name, 0, -1))
2163 DEBUG(D_acl) debug_printf_indent(
2164 "Matched regex to malware [%s] [%s]\n", malware_re, malware_name);
2172 /*************************************************
2173 * Scan an email for malware *
2174 *************************************************/
2176 /* This is the normal interface for scanning an email, which doesn't need a
2177 filename; it's a wrapper around the malware_file function.
2180 malware_re match condition for "malware="
2181 timeout if nonzero, timeout in seconds
2183 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2184 where true means malware was found (condition applies)
2187 malware(const uschar * malware_re, int timeout)
2189 int ret = malware_internal(malware_re, NULL, timeout);
2191 if (ret == DEFER) av_failed = TRUE;
2196 /*************************************************
2197 * Scan a file for malware *
2198 *************************************************/
2200 /* This is a test wrapper for scanning an email, which is not used in
2201 normal processing. Scan any file, using the Exim scanning interface.
2202 This function tampers with various global variables so is unsafe to use
2203 in any other context.
2206 eml_filename a file holding the message to be scanned
2208 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2209 where true means malware was found (condition applies)
2212 malware_in_file(uschar *eml_filename)
2214 uschar message_id_buf[64];
2217 /* spool_mbox() assumes various parameters exist, when creating
2218 the relevant directory and the email within */
2220 (void) string_format(message_id_buf, sizeof(message_id_buf),
2221 "dummy-%d", vaguely_random_number(INT_MAX));
2222 message_id = message_id_buf;
2223 sender_address = US"malware-sender@example.net";
2225 recipients_list = NULL;
2226 receive_add_recipient(US"malware-victim@example.net", -1);
2227 f.enable_dollar_recipients = TRUE;
2229 ret = malware_internal(US"*", eml_filename, 0);
2231 Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id));
2234 /* don't set no_mbox_unspool; at present, there's no way for it to become
2235 set, but if that changes, then it should apply to these tests too */
2239 /* silence static analysis tools */
2249 if (!malware_default_re)
2250 malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE);
2252 #ifndef DISABLE_MAL_DRWEB
2254 drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE);
2256 #ifndef DISABLE_MAL_FSECURE
2258 fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE);
2260 #ifndef DISABLE_MAL_KAV
2262 kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE);
2264 kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE);
2266 #ifndef DISABLE_MAL_AVAST
2268 ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE);
2270 ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE);
2272 ava_re_error = regex_must_compile(ava_re_error_str, FALSE, TRUE);
2274 #ifndef DISABLE_MAL_FFROT6D
2275 if (!fprot6d_re_error)
2276 fprot6d_re_error = regex_must_compile(fprot6d_re_error_str, FALSE, TRUE);
2277 if (!fprot6d_re_virus)
2278 fprot6d_re_virus = regex_must_compile(fprot6d_re_virus_str, FALSE, TRUE);
2284 malware_show_supported(FILE * f)
2286 fprintf(f, "Malware:");
2287 for (struct scan * sc = m_scans; sc->scancode != (scanner_t)-1; sc++) fprintf(f, " %s", sc->name);
2292 # endif /*!MACRO_PREDEF*/
2293 #endif /*WITH_CONTENT_SCAN*/