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 - 2020
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 */
223 #ifndef DISABLE_MAL_AVAST
229 if (*p == '\\' && (isspace(p[1]) || p[1] == '\\'))
230 for (p0 = p; *p0; ++p0) *p0 = p0[1];
234 /* --- malware_*_defer --- */
236 malware_panic_defer(const uschar * str)
238 log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str);
242 malware_log_defer(const uschar * str)
244 log_write(0, LOG_MAIN, "malware acl condition: %s", str);
247 /* --- m_*_defer --- */
249 m_panic_defer(struct scan * scanent, const uschar * hostport,
252 return malware_panic_defer(string_sprintf("%s %s : %s",
253 scanent->name, hostport ? hostport : CUS"", str));
255 /* --- m_*_defer_3 */
257 m_panic_defer_3(struct scan * scanent, const uschar * hostport,
258 const uschar * str, int fd_to_close)
260 DEBUG(D_acl) debug_print_socket(fd_to_close);
261 (void) close(fd_to_close);
262 return m_panic_defer(scanent, hostport, str);
265 /*************************************************/
267 #ifndef DISABLE_MAL_CLAM
268 /* Only used by the Clamav code, which is working from a list of servers and
269 uses the returned in_addr to get a second connection to the same system.
272 m_tcpsocket(const uschar * hostname, unsigned int port,
273 host_item * host, uschar ** errstr, const blob * fastopen_blob)
275 return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5,
276 host, errstr, fastopen_blob);
281 m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr)
283 if (send(sock, buf, cnt, 0) < 0)
287 *errstr = string_sprintf("unable to send to socket (%s): %s",
295 m_pcre_compile(const uschar * re, uschar ** errstr)
297 const uschar * rerror;
301 if (!(cre = pcre_compile(CS re, PCRE_COPT, CCSS &rerror, &roffset, NULL)))
302 *errstr= string_sprintf("regular expression error in '%s': %s at offset %d",
303 re, rerror, roffset);
308 m_pcre_exec(const pcre * cre, uschar * text)
311 int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0,
312 ovector, nelem(ovector));
313 uschar * substr = NULL;
314 if (i >= 2) /* Got it */
315 pcre_get_substring(CS text, ovector, i, 1, CCSS &substr);
320 m_pcre_nextinlist(const uschar ** list, int * sep,
321 char * listerr, uschar ** errstr)
323 const uschar * list_ele;
324 const pcre * cre = NULL;
326 if (!(list_ele = string_nextinlist(list, sep, NULL, 0)))
327 *errstr = US listerr;
330 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "RE: ",
331 string_printing(list_ele));
332 cre = m_pcre_compile(CUS list_ele, errstr);
339 Simple though inefficient wrapper for reading a line. Drop CRs and the
340 trailing newline. Can return early on buffer full. Null-terminate.
341 Apply initial timeout if no data ready.
343 Return: number of chars - zero for an empty line
345 -2 on timeout or error
348 recv_line(int fd, uschar * buffer, int bsize, time_t tmo)
354 if (!fd_ready(fd, tmo))
357 /*XXX tmo handling assumes we always get a whole line */
360 while ((rcv = read(fd, p, 1)) > 0)
363 if (p-buffer > bsize-2) break;
364 if (*p == '\n') break;
371 debug_printf_indent("Malware scan: read %s (%s)\n",
372 rcv==0 ? "EOF" : "error", strerror(errno));
373 debug_print_socket(fd);
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 */
384 #ifndef DISABLE_MAL_DRWEB
386 recv_len(int sock, void * buf, int size, time_t tmo)
388 return fd_ready(sock, tmo)
389 ? recv(sock, buf, size, 0) == size
396 #ifndef DISABLE_MAL_MKS
397 /* ============= private routines for the "mksd" scanner type ============== */
399 # include <sys/uio.h>
402 mksd_writev (int sock, struct iovec * iov, int iovcnt)
409 i = writev (sock, iov, iovcnt);
410 while (i < 0 && errno == EINTR);
413 (void) malware_panic_defer(
414 US"unable to write to mksd UNIX socket (/var/run/mksd/socket)");
417 for (;;) /* check for short write */
418 if (i >= iov->iov_len)
428 iov->iov_base = CS iov->iov_base + i;
435 mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, time_t tmo)
437 client_conn_ctx cctx = {.sock = sock};
443 i = ip_recv(&cctx, av_buffer+offset, av_buffer_size-offset, tmo);
446 (void) malware_panic_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)");
451 /* offset == av_buffer_size -> buffer full */
452 if (offset == av_buffer_size)
454 (void) malware_panic_defer(US"malformed reply received from mksd");
457 } while (av_buffer[offset-1] != '\n');
459 av_buffer[offset] = '\0';
464 mksd_parse_line(struct scan * scanent, char * line)
475 if ((p = strchr (line, '\n')) != NULL)
477 return m_panic_defer(scanent, NULL,
478 string_sprintf("scanner failed: %s", line));
481 if ((p = strchr (line, '\n')) != NULL)
486 && (p = strchr(line+4, ' ')) != NULL
491 malware_name = string_copy(US line+4);
495 return m_panic_defer(scanent, NULL,
496 string_sprintf("malformed reply received: %s", line));
501 mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename,
505 const char *cmd = "MSQ\n";
506 uschar av_buffer[1024];
508 iov[0].iov_base = (void *) cmd;
510 iov[1].iov_base = (void *) scan_filename;
511 iov[1].iov_len = Ustrlen(scan_filename);
512 iov[2].iov_base = (void *) (cmd + 3);
515 if (mksd_writev (sock, iov, 3) < 0)
518 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0)
521 return mksd_parse_line (scanent, CS av_buffer);
526 #ifndef DISABLE_MAL_CLAM
528 clamd_option(clamd_address * cd, const uschar * optstr, int * subsep)
533 while ((s = string_nextinlist(&optstr, subsep, NULL, 0)))
534 if (Ustrncmp(s, "retry=", 6) == 0)
536 int sec = readconf_readtime((s += 6), '\0', FALSE);
549 /*************************************************
550 * Scan content for malware *
551 *************************************************/
553 /* This is an internal interface for scanning an email; the normal interface
554 is via malware(), or there's malware_in_file() used for testing/debugging.
557 malware_re match condition for "malware="
558 scan_filename the file holding the email to be scanned, if we're faking
559 this up for the -bmalware test, else NULL
560 timeout if nonzero, non-default timeoutl
562 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
563 where true means malware was found (condition applies)
566 malware_internal(const uschar * malware_re, const uschar * scan_filename,
570 const uschar *av_scanner_work = av_scanner;
571 uschar *scanner_name;
572 unsigned long mbox_size;
576 struct scan * scanent;
577 const uschar * scanner_options;
578 client_conn_ctx malware_daemon_ctx = {.sock = -1};
580 uschar * eml_filename, * eml_dir;
583 return FAIL; /* empty means "don't match anything" */
585 /* Ensure the eml mbox file is spooled up */
587 if (!(mbox_file = spool_mbox(&mbox_size, scan_filename, &eml_filename)))
588 return malware_panic_defer(US"error while creating mbox spool file");
590 /* None of our current scanners need the mbox file as a stream (they use
591 the name), so we can close it right away. Get the directory too. */
593 (void) fclose(mbox_file);
594 eml_dir = string_copyn(eml_filename, Ustrrchr(eml_filename, '/') - eml_filename);
596 /* parse 1st option */
597 if (strcmpic(malware_re, US"false") == 0 || Ustrcmp(malware_re,"0") == 0)
598 return FAIL; /* explicitly no matching */
600 /* special cases (match anything except empty) */
601 if ( strcmpic(malware_re,US"true") == 0
602 || Ustrcmp(malware_re,"*") == 0
603 || Ustrcmp(malware_re,"1") == 0
606 if ( !malware_default_re
607 && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr)))
608 return malware_panic_defer(errstr);
609 malware_re = malware_regex_default;
610 re = malware_default_re;
613 /* compile the regex, see if it works */
614 else if (!(re = m_pcre_compile(malware_re, &errstr)))
615 return malware_panic_defer(errstr);
617 /* if av_scanner starts with a dollar, expand it first */
618 if (*av_scanner == '$')
620 if (!(av_scanner_work = expand_string(av_scanner)))
621 return malware_panic_defer(
622 string_sprintf("av_scanner starts with $, but expansion failed: %s",
623 expand_string_message));
626 debug_printf_indent("Expanded av_scanner global: %s\n", av_scanner_work);
627 /* disable result caching in this case */
632 /* Do not scan twice (unless av_scanner is dynamic). */
635 /* find the scanner type from the av_scanner option */
636 if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
637 return malware_panic_defer(US"av_scanner configuration variable is empty");
638 if (!timeout) timeout = MALWARE_TIMEOUT;
639 tmo = time(NULL) + timeout;
641 for (scanent = m_scans; ; scanent++)
644 return malware_panic_defer(string_sprintf("unknown scanner type '%s'",
646 if (strcmpic(scanner_name, US scanent->name) != 0)
648 DEBUG(D_acl) debug_printf_indent("Malware scan: %s tmo=%s\n",
649 scanner_name, readconf_printtime(timeout));
651 if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
652 scanner_options = scanent->options_default;
653 if (scanent->conn == MC_NONE)
656 DEBUG(D_acl) debug_printf_indent("%15s%10s%s\n", "", "socket: ", scanner_options);
657 switch(scanent->conn)
660 malware_daemon_ctx.sock = ip_tcpsocket(scanner_options, &errstr, 5, NULL); break;
662 malware_daemon_ctx.sock = ip_unixsocket(scanner_options, &errstr); break;
664 malware_daemon_ctx.sock = ip_streamsocket(scanner_options, &errstr, 5, NULL); break;
666 /* compiler quietening */ break;
668 if (malware_daemon_ctx.sock < 0)
669 return m_panic_defer(scanent, CUS callout_address, errstr);
673 switch (scanent->scancode)
675 #ifndef DISABLE_MAL_FFROTD
676 case M_FPROTD: /* "f-protd" scanner type -------------------------------- */
678 uschar *fp_scan_option;
679 unsigned int detected=0, par_count=0;
680 uschar * scanrequest;
681 uschar buf[32768], *strhelper, *strhelper2;
682 uschar * malware_name_internal = NULL;
685 scanrequest = string_sprintf("GET %s", eml_filename);
687 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
690 scanrequest = string_sprintf("%s%s%s", scanrequest,
691 par_count ? "%20" : "?", fp_scan_option);
694 scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest);
695 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
696 scanner_name, scanrequest);
698 /* send scan request */
699 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
700 return m_panic_defer(scanent, CUS callout_address, errstr);
702 while ((len = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) >= 0)
705 if (Ustrstr(buf, US"<detected type=\"") != NULL)
707 else if (detected && (strhelper = Ustrstr(buf, US"<name>")))
709 if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL)
712 malware_name_internal = string_copy(strhelper+6);
715 else if (Ustrstr(buf, US"<summary code=\""))
717 malware_name = Ustrstr(buf, US"<summary code=\"11\">")
718 ? malware_name_internal : NULL;
724 (void)close(malware_daemon_ctx.sock);
731 #ifndef DISABLE_MAL_FFROT6D
732 case M_FPROT6D: /* "f-prot6d" scanner type ----------------------------------- */
737 uschar * scanrequest;
738 uschar av_buffer[1024];
740 if ((!fprot6d_re_virus && !(fprot6d_re_virus = m_pcre_compile(fprot6d_re_virus_str, &errstr)))
741 || (!fprot6d_re_error && !(fprot6d_re_error = m_pcre_compile(fprot6d_re_error_str, &errstr))))
742 return malware_panic_defer(errstr);
744 scanrequest = string_sprintf("SCAN FILE %s\n", eml_filename);
745 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
746 scanner_name, scanrequest);
748 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest), &errstr) < 0)
749 return m_panic_defer(scanent, CUS callout_address, errstr);
751 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
754 return m_panic_defer_3(scanent, CUS callout_address,
755 string_sprintf("unable to read from socket (%s)", strerror(errno)),
756 malware_daemon_ctx.sock);
758 if (bread == sizeof(av_buffer))
759 return m_panic_defer_3(scanent, CUS callout_address,
760 US"buffer too small", malware_daemon_ctx.sock);
762 av_buffer[bread] = '\0';
763 linebuffer = string_copy(av_buffer);
765 m_sock_send(malware_daemon_ctx.sock, US"QUIT\n", 5, 0);
767 if ((e = m_pcre_exec(fprot6d_re_error, linebuffer)))
768 return m_panic_defer_3(scanent, CUS callout_address,
769 string_sprintf("scanner reported error (%s)", e), malware_daemon_ctx.sock);
771 if (!(malware_name = m_pcre_exec(fprot6d_re_virus, linebuffer)))
778 #ifndef DISABLE_MAL_DRWEB
779 case M_DRWEB: /* "drweb" scanner type ----------------------------------- */
780 /* v0.1 - added support for tcp sockets */
781 /* v0.0 - initial release -- support for unix sockets */
785 unsigned int fsize_uint;
786 uschar * tmpbuf, *drweb_fbuf;
787 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
788 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
790 /* prepare variables */
791 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
792 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
794 if (*scanner_options != '/')
797 if ((drweb_fd = exim_open2(CCS eml_filename, O_RDONLY)) == -1)
798 return m_panic_defer_3(scanent, NULL,
799 string_sprintf("can't open spool file %s: %s",
800 eml_filename, strerror(errno)),
801 malware_daemon_ctx.sock);
803 if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1)
806 badseek: err = errno;
807 (void)close(drweb_fd);
808 return m_panic_defer_3(scanent, NULL,
809 string_sprintf("can't seek spool file %s: %s",
810 eml_filename, strerror(err)),
811 malware_daemon_ctx.sock);
813 fsize_uint = (unsigned int) fsize;
814 if ((off_t)fsize_uint != fsize)
816 (void)close(drweb_fd);
817 return m_panic_defer_3(scanent, NULL,
818 string_sprintf("seeking spool file %s, size overflow",
820 malware_daemon_ctx.sock);
822 drweb_slen = htonl(fsize);
823 if (lseek(drweb_fd, 0, SEEK_SET) < 0)
826 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s remote scan [%s]\n",
827 scanner_name, scanner_options);
829 /* send scan request */
830 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
831 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
832 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
833 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0))
835 (void)close(drweb_fd);
836 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
837 "unable to send commands to socket (%s)", scanner_options),
838 malware_daemon_ctx.sock);
841 if (!(drweb_fbuf = store_malloc(fsize_uint)))
843 (void)close(drweb_fd);
844 return m_panic_defer_3(scanent, NULL,
845 string_sprintf("unable to allocate memory %u for file (%s)",
846 fsize_uint, eml_filename),
847 malware_daemon_ctx.sock);
850 if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1)
853 (void)close(drweb_fd);
854 store_free(drweb_fbuf);
855 return m_panic_defer_3(scanent, NULL,
856 string_sprintf("can't read spool file %s: %s",
857 eml_filename, strerror(err)),
858 malware_daemon_ctx.sock);
860 (void)close(drweb_fd);
862 /* send file body to socket */
863 if (send(malware_daemon_ctx.sock, drweb_fbuf, fsize, 0) < 0)
865 store_free(drweb_fbuf);
866 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
867 "unable to send file body to socket (%s)", scanner_options),
868 malware_daemon_ctx.sock);
870 store_free(drweb_fbuf);
874 drweb_slen = htonl(Ustrlen(eml_filename));
876 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s local scan [%s]\n",
877 scanner_name, scanner_options);
879 /* send scan request */
880 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
881 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
882 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
883 (send(malware_daemon_ctx.sock, eml_filename, Ustrlen(eml_filename), 0) < 0) ||
884 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0))
885 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
886 "unable to send commands to socket (%s)", scanner_options),
887 malware_daemon_ctx.sock);
890 /* wait for result */
891 if (!recv_len(malware_daemon_ctx.sock, &drweb_rc, sizeof(drweb_rc), tmo))
892 return m_panic_defer_3(scanent, CUS callout_address,
893 US"unable to read return code", malware_daemon_ctx.sock);
894 drweb_rc = ntohl(drweb_rc);
896 if (!recv_len(malware_daemon_ctx.sock, &drweb_vnum, sizeof(drweb_vnum), tmo))
897 return m_panic_defer_3(scanent, CUS callout_address,
898 US"unable to read the number of viruses", malware_daemon_ctx.sock);
899 drweb_vnum = ntohl(drweb_vnum);
901 /* "virus(es) found" if virus number is > 0 */
906 /* setup default virus name */
907 malware_name = US"unknown";
909 /* set up match regex */
911 drweb_re = m_pcre_compile(drweb_re_str, &errstr);
913 /* read and concatenate virus names into one string */
914 for (int i = 0; i < drweb_vnum; i++)
918 /* read the size of report */
919 if (!recv_len(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), tmo))
920 return m_panic_defer_3(scanent, CUS callout_address,
921 US"cannot read report size", malware_daemon_ctx.sock);
922 drweb_slen = ntohl(drweb_slen);
924 /* assume tainted, since it is external input */
925 tmpbuf = store_get(drweb_slen, TRUE);
927 /* read report body */
928 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, drweb_slen, tmo))
929 return m_panic_defer_3(scanent, CUS callout_address,
930 US"cannot read report string", malware_daemon_ctx.sock);
931 tmpbuf[drweb_slen] = '\0';
933 /* try matcher on the line, grab substring */
934 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0,
935 ovector, nelem(ovector));
938 const char * pre_malware_nb;
940 pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb);
942 if (i==0) /* the first name we just copy to malware_name */
943 g = string_cat(NULL, US pre_malware_nb);
945 /*XXX could be string_append_listele? */
946 else /* concatenate each new virus name to previous */
947 g = string_append(g, 2, "/", pre_malware_nb);
949 pcre_free_substring(pre_malware_nb);
952 malware_name = string_from_gstring(g);
956 const char *drweb_s = NULL;
958 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
959 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
960 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
961 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
962 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
963 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
964 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
965 * and others are ignored */
967 return m_panic_defer_3(scanent, CUS callout_address,
968 string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s),
969 malware_daemon_ctx.sock);
978 #ifndef DISABLE_MAL_AVE
979 case M_AVES: /* "aveserver" scanner type -------------------------------- */
984 /* read aveserver's greeting and see if it is ready (2xx greeting) */
986 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
988 if (buf[0] != '2') /* aveserver is having problems */
989 return m_panic_defer_3(scanent, CUS callout_address,
990 string_sprintf("unavailable (Responded: %s).",
991 ((buf[0] != 0) ? buf : US "nothing") ),
992 malware_daemon_ctx.sock);
994 /* prepare our command */
995 (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n",
999 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s %s\n",
1001 if (m_sock_send(malware_daemon_ctx.sock, buf, Ustrlen(buf), &errstr) < 0)
1002 return m_panic_defer(scanent, CUS callout_address, errstr);
1004 malware_name = NULL;
1006 /* read response lines, find malware name and final response */
1007 while (recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo) > 0)
1011 if (buf[0] == '5') /* aveserver is having problems */
1013 result = m_panic_defer(scanent, CUS callout_address,
1014 string_sprintf("unable to scan file %s (Responded: %s).",
1015 eml_filename, buf));
1018 if (Ustrncmp(buf,"322",3) == 0)
1020 uschar *p = Ustrchr(&buf[4], ' ');
1022 malware_name = string_copy(&buf[4]);
1026 if (m_sock_send(malware_daemon_ctx.sock, US"quit\r\n", 6, &errstr) < 0)
1027 return m_panic_defer(scanent, CUS callout_address, errstr);
1029 /* read aveserver's greeting and see if it is ready (2xx greeting) */
1031 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
1033 if (buf[0] != '2') /* aveserver is having problems */
1034 return m_panic_defer_3(scanent, CUS callout_address,
1035 string_sprintf("unable to quit dialogue (Responded: %s).",
1036 ((buf[0] != 0) ? buf : US "nothing") ),
1037 malware_daemon_ctx.sock);
1039 if (result == DEFER)
1041 (void)close(malware_daemon_ctx.sock);
1048 #ifndef DISABLE_MAL_FSECURE
1049 case M_FSEC: /* "fsecure" scanner type ---------------------------------- */
1053 uschar av_buffer[1024];
1054 static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n",
1055 US"CONFIGURE\tTIMEOUT\t0\n",
1056 US"CONFIGURE\tMAXARCH\t5\n",
1057 US"CONFIGURE\tMIME\t1\n" };
1059 malware_name = NULL;
1061 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1062 scanner_name, scanner_options);
1064 memset(av_buffer, 0, sizeof(av_buffer));
1065 for (i = 0; i != nelem(cmdopt); i++)
1068 if (m_sock_send(malware_daemon_ctx.sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0)
1069 return m_panic_defer(scanent, CUS callout_address, errstr);
1071 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1072 if (bread > 0) av_buffer[bread]='\0';
1074 return m_panic_defer_3(scanent, CUS callout_address,
1075 string_sprintf("unable to read answer %d (%s)", i, strerror(errno)),
1076 malware_daemon_ctx.sock);
1077 for (int j = 0; j < bread; j++)
1078 if (av_buffer[j] == '\r' || av_buffer[j] == '\n')
1082 /* pass the mailfile to fsecure */
1083 file_name = string_sprintf("SCAN\t%s\n", eml_filename);
1085 if (m_sock_send(malware_daemon_ctx.sock, file_name, Ustrlen(file_name), &errstr) < 0)
1086 return m_panic_defer(scanent, CUS callout_address, errstr);
1089 /* todo also SUSPICION\t */
1091 fsec_re = m_pcre_compile(fsec_re_str, &errstr);
1093 /* read report, linewise. Apply a timeout as the Fsecure daemon
1094 sometimes wants an answer to "PING" but they won't tell us what */
1096 uschar * p = av_buffer;
1102 i = av_buffer+sizeof(av_buffer)-p;
1103 if ((bread= ip_recv(&malware_daemon_ctx, p, i-1, tmo)) < 0)
1104 return m_panic_defer_3(scanent, CUS callout_address,
1105 string_sprintf("unable to read result (%s)", strerror(errno)),
1106 malware_daemon_ctx.sock);
1108 for (p[bread] = '\0'; (q = Ustrchr(p, '\n')); p = q+1)
1112 /* Really search for virus again? */
1114 /* try matcher on the line, grab substring */
1115 malware_name = m_pcre_exec(fsec_re, p);
1117 if (Ustrstr(p, "OK\tScan ok."))
1121 /* copy down the trailing partial line then read another chunk */
1122 i = av_buffer+sizeof(av_buffer)-p;
1123 memmove(av_buffer, p, i);
1133 #ifndef DISABLE_MAL_KAV
1134 case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */
1137 uschar tmpbuf[1024];
1138 uschar * scanrequest;
1140 unsigned long kav_reportlen;
1145 /* get current date and time, build scan request */
1147 /* pdp note: before the eml_filename parameter, this scanned the
1148 directory; not finding documentation, so we'll strip off the directory.
1149 The side-effect is that the test framework scanning may end up in
1150 scanning more than was requested, but for the normal interface, this is
1153 strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t));
1154 scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename);
1155 p = Ustrrchr(scanrequest, '/');
1159 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1160 scanner_name, scanner_options);
1162 /* send scan request */
1163 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
1164 return m_panic_defer(scanent, CUS callout_address, errstr);
1166 /* wait for result */
1167 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, 2, tmo))
1168 return m_panic_defer_3(scanent, CUS callout_address,
1169 US"unable to read 2 bytes from socket.", malware_daemon_ctx.sock);
1171 /* get errorcode from one nibble */
1172 kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F;
1175 case 5: case 6: /* improper kavdaemon configuration */
1176 return m_panic_defer_3(scanent, CUS callout_address,
1177 US"please reconfigure kavdaemon to NOT disinfect or remove infected files.",
1178 malware_daemon_ctx.sock);
1180 return m_panic_defer_3(scanent, CUS callout_address,
1181 US"reported 'scanning not completed' (code 1).", malware_daemon_ctx.sock);
1183 return m_panic_defer_3(scanent, CUS callout_address,
1184 US"reported 'kavdaemon damaged' (code 7).", malware_daemon_ctx.sock);
1187 /* code 8 is not handled, since it is ambiguous. It appears mostly on
1188 bounces where part of a file has been cut off */
1190 /* "virus found" return codes (2-4) */
1191 if (kav_rc > 1 && kav_rc < 5)
1193 int report_flag = 0;
1195 /* setup default virus name */
1196 malware_name = US"unknown";
1198 report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ];
1200 /* read the report, if available */
1201 if (report_flag == 1)
1203 /* read report size */
1204 if (!recv_len(malware_daemon_ctx.sock, &kav_reportlen, 4, tmo))
1205 return m_panic_defer_3(scanent, CUS callout_address,
1206 US"cannot read report size", malware_daemon_ctx.sock);
1208 /* it's possible that avp returns av_buffer[1] == 1 but the
1209 reportsize is 0 (!?) */
1210 if (kav_reportlen > 0)
1212 /* set up match regex, depends on retcode */
1215 if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr);
1216 kav_re = kav_re_sus;
1220 if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr);
1221 kav_re = kav_re_inf;
1224 /* read report, linewise. Using size from stream to read amount of data
1225 from same stream is safe enough. */
1226 /* coverity[tainted_data] */
1227 while (kav_reportlen > 0)
1229 if ((bread = recv_line(malware_daemon_ctx.sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0)
1231 kav_reportlen -= bread+1;
1233 /* try matcher on the line, grab substring */
1234 if ((malware_name = m_pcre_exec(kav_re, tmpbuf)))
1240 else /* no virus found */
1241 malware_name = NULL;
1247 #ifndef DISABLE_MAL_CMDLINE
1248 case M_CMDL: /* "cmdline" scanner type ---------------------------------- */
1250 const uschar *cmdline_scanner = scanner_options;
1251 const pcre *cmdline_trigger_re;
1252 const pcre *cmdline_regex_re;
1254 uschar * commandline;
1255 void (*eximsigchld)(int);
1256 void (*eximsigpipe)(int);
1257 FILE *scanner_out = NULL;
1259 FILE *scanner_record = NULL;
1260 uschar linebuffer[32767];
1265 if (!cmdline_scanner)
1266 return m_panic_defer(scanent, NULL, errstr);
1268 /* find scanner output trigger */
1269 cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1270 "missing trigger specification", &errstr);
1271 if (!cmdline_trigger_re)
1272 return m_panic_defer(scanent, NULL, errstr);
1274 /* find scanner name regex */
1275 cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1276 "missing virus name regex specification", &errstr);
1277 if (!cmdline_regex_re)
1278 return m_panic_defer(scanent, NULL, errstr);
1280 /* prepare scanner call; despite the naming, file_name holds a directory
1281 name which is documented as the value given to %s. */
1283 file_name = string_copy(eml_filename);
1284 p = Ustrrchr(file_name, '/');
1287 commandline = string_sprintf(CS cmdline_scanner, file_name);
1289 /* redirect STDERR too */
1290 commandline = string_sprintf("%s 2>&1", commandline);
1292 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1293 scanner_name, commandline);
1295 /* store exims signal handlers */
1296 eximsigchld = signal(SIGCHLD,SIG_DFL);
1297 eximsigpipe = signal(SIGPIPE,SIG_DFL);
1299 if (!(scanner_out = popen(CS commandline,"r")))
1302 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1303 return m_panic_defer(scanent, NULL,
1304 string_sprintf("call (%s) failed: %s.", commandline, strerror(err)));
1306 scanner_fd = fileno(scanner_out);
1308 file_name = string_sprintf("%s/%s_scanner_output", eml_dir, message_id);
1310 if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE)))
1313 (void) pclose(scanner_out);
1314 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1315 return m_panic_defer(scanent, NULL, string_sprintf(
1316 "opening scanner output file (%s) failed: %s.",
1317 file_name, strerror(err)));
1320 /* look for trigger while recording output */
1321 while ((rcnt = recv_line(scanner_fd, linebuffer,
1322 sizeof(linebuffer), tmo)))
1329 (void) pclose(scanner_out);
1330 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1331 return m_panic_defer(scanent, NULL, string_sprintf(
1332 "unable to read from scanner (%s): %s",
1333 commandline, strerror(err)));
1336 if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record))
1339 (void) pclose(scanner_out);
1340 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1341 return m_panic_defer(scanent, NULL, string_sprintf(
1342 "short write on scanner output file (%s).", file_name));
1344 putc('\n', scanner_record);
1345 /* try trigger match */
1347 && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)
1352 (void)fclose(scanner_record);
1353 sep = pclose(scanner_out);
1354 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1356 return m_panic_defer(scanent, NULL,
1358 ? string_sprintf("running scanner failed: %s", strerror(sep))
1359 : string_sprintf("scanner returned error code: %d", sep));
1364 /* setup default virus name */
1365 malware_name = US"unknown";
1367 /* re-open the scanner output file, look for name match */
1368 scanner_record = Ufopen(file_name, "rb");
1369 while (Ufgets(linebuffer, sizeof(linebuffer), scanner_record))
1370 if ((s = m_pcre_exec(cmdline_regex_re, linebuffer))) /* try match */
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 = exim_open2(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(gstring * g)
2285 g = string_cat(g, US"Malware:");
2286 for (struct scan * sc = m_scans; sc->scancode != (scanner_t)-1; sc++)
2287 g = string_fmt_append(g, " %s", sc->name);
2288 return string_cat(g, US"\n");
2292 # endif /*!MACRO_PREDEF*/
2293 #endif /*WITH_CONTENT_SCAN*/