Commit | Line | Data |
---|---|---|
8523533c TK |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
80fea873 JH |
5 | /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015 |
6 | * License: GPL | |
f9ba5e22 | 7 | * Copyright (c) The Exim Maintainers 2015 - 2018 |
80fea873 | 8 | */ |
8523533c TK |
9 | |
10 | /* Code for calling virus (malware) scanners. Called from acl.c. */ | |
11 | ||
12 | #include "exim.h" | |
c11d665d | 13 | #ifdef WITH_CONTENT_SCAN /* entire file */ |
8523533c | 14 | |
c8599aad JH |
15 | typedef enum { |
16 | #ifndef DISABLE_MAL_FFROTD | |
17 | M_FPROTD, | |
18 | #endif | |
19 | #ifndef DISABLE_MAL_FFROT6D | |
20 | M_FPROT6D, | |
21 | #endif | |
22 | #ifndef DISABLE_MAL_DRWEB | |
23 | M_DRWEB, | |
24 | #endif | |
25 | #ifndef DISABLE_MAL_AVE | |
26 | M_AVES, | |
27 | #endif | |
28 | #ifndef DISABLE_MAL_FSECURE | |
29 | M_FSEC, | |
30 | #endif | |
31 | #ifndef DISABLE_MAL_KAV | |
32 | M_KAVD, | |
33 | #endif | |
34 | #ifndef DISABLE_MAL_SOPHIE | |
35 | M_SOPHIE, | |
36 | #endif | |
37 | #ifndef DISABLE_MAL_CLAM | |
38 | M_CLAMD, | |
39 | #endif | |
40 | #ifndef DISABLE_MAL_MKS | |
41 | M_MKSD, | |
42 | #endif | |
43 | #ifndef DISABLE_MAL_AVAST | |
44 | M_AVAST, | |
45 | #endif | |
46 | #ifndef DISABLE_MAL_SOCK | |
47 | M_SOCK, | |
48 | #endif | |
49 | #ifndef DISABLE_MAL_CMDLINE | |
50 | M_CMDL, | |
51 | #endif | |
52 | } scanner_t; | |
b1f8e4f8 JH |
53 | typedef enum {MC_NONE, MC_TCP, MC_UNIX, MC_STRM} contype_t; |
54 | static struct scan | |
55 | { | |
56 | scanner_t scancode; | |
57 | const uschar * name; | |
58 | const uschar * options_default; | |
59 | contype_t conn; | |
60 | } m_scans[] = | |
61 | { | |
c11d665d | 62 | #ifndef DISABLE_MAL_FFROTD |
b1f8e4f8 | 63 | { M_FPROTD, US"f-protd", US"localhost 10200-10204", MC_TCP }, |
c11d665d JH |
64 | #endif |
65 | #ifndef DISABLE_MAL_FFROT6D | |
66 | { M_FPROT6D, US"f-prot6d", US"localhost 10200", MC_TCP }, | |
67 | #endif | |
68 | #ifndef DISABLE_MAL_DRWEB | |
b1f8e4f8 | 69 | { M_DRWEB, US"drweb", US"/usr/local/drweb/run/drwebd.sock", MC_STRM }, |
c11d665d JH |
70 | #endif |
71 | #ifndef DISABLE_MAL_AVE | |
b1f8e4f8 | 72 | { M_AVES, US"aveserver", US"/var/run/aveserver", MC_UNIX }, |
c11d665d JH |
73 | #endif |
74 | #ifndef DISABLE_MAL_FSECURE | |
b1f8e4f8 | 75 | { M_FSEC, US"fsecure", US"/var/run/.fsav", MC_UNIX }, |
c11d665d JH |
76 | #endif |
77 | #ifndef DISABLE_MAL_KAV | |
b1f8e4f8 | 78 | { M_KAVD, US"kavdaemon", US"/var/run/AvpCtl", MC_UNIX }, |
c11d665d JH |
79 | #endif |
80 | #ifndef DISABLE_MAL_SOPHIE | |
b1f8e4f8 | 81 | { M_SOPHIE, US"sophie", US"/var/run/sophie", MC_UNIX }, |
c11d665d JH |
82 | #endif |
83 | #ifndef DISABLE_MAL_CLAM | |
b1f8e4f8 | 84 | { M_CLAMD, US"clamd", US"/tmp/clamd", MC_NONE }, |
c11d665d JH |
85 | #endif |
86 | #ifndef DISABLE_MAL_MKS | |
b1f8e4f8 | 87 | { M_MKSD, US"mksd", NULL, MC_NONE }, |
c11d665d JH |
88 | #endif |
89 | #ifndef DISABLE_MAL_AVAST | |
b6fbf22d | 90 | { M_AVAST, US"avast", US"/var/run/avast/scan.sock", MC_STRM }, |
c11d665d JH |
91 | #endif |
92 | #ifndef DISABLE_MAL_SOCK | |
93 | { M_SOCK, US"sock", US"/tmp/malware.sock", MC_STRM }, | |
94 | #endif | |
95 | #ifndef DISABLE_MAL_CMDLINE | |
96 | { M_CMDL, US"cmdline", NULL, MC_NONE }, | |
97 | #endif | |
b1f8e4f8 JH |
98 | { -1, NULL, NULL, MC_NONE } /* end-marker */ |
99 | }; | |
100 | ||
c11d665d JH |
101 | /******************************************************************************/ |
102 | # ifdef MACRO_PREDEF /* build solely to predefine macros */ | |
103 | ||
104 | # include "macro_predef.h" | |
105 | ||
106 | void | |
107 | features_malware(void) | |
108 | { | |
2b8b8e4e JH |
109 | const struct scan * sc; |
110 | const uschar * s; | |
111 | uschar * t; | |
c11d665d JH |
112 | uschar buf[64]; |
113 | ||
114 | spf(buf, sizeof(buf), US"_HAVE_MALWARE_"); | |
115 | ||
116 | for (sc = m_scans; sc->scancode != -1; sc++) | |
117 | { | |
118 | for(s = sc->name, t = buf+14; *s; s++) if (*s != '-') *t++ = toupper(*s); | |
119 | *t = '\0'; | |
120 | builtin_macro_create(buf); | |
121 | } | |
122 | } | |
123 | ||
124 | /******************************************************************************/ | |
125 | # else /*!MACRO_PREDEF, main build*/ | |
126 | ||
127 | ||
128 | #define MALWARE_TIMEOUT 120 /* default timeout, seconds */ | |
129 | ||
130 | static const uschar * malware_regex_default = US ".+"; | |
131 | static const pcre * malware_default_re = NULL; | |
132 | ||
133 | ||
134 | ||
135 | #ifndef DISABLE_MAL_CLAM | |
599dcb77 | 136 | /* The maximum number of clamd servers that are supported in the configuration */ |
c11d665d JH |
137 | # define MAX_CLAMD_SERVERS 32 |
138 | # define MAX_CLAMD_SERVERS_S "32" | |
599dcb77 | 139 | |
8a512ed5 JH |
140 | typedef struct clamd_address { |
141 | uschar * hostspec; | |
142 | unsigned tcp_port; | |
143 | unsigned retry; | |
144 | } clamd_address; | |
8523533c TK |
145 | #endif |
146 | ||
a9ccd69a | 147 | |
c11d665d JH |
148 | #ifndef DISABLE_MAL_DRWEB |
149 | # define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */ | |
150 | # define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */ | |
151 | # define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */ | |
8523533c | 152 | |
c11d665d JH |
153 | # define DERR_READ_ERR (1<<0) /* read error */ |
154 | # define DERR_NOMEMORY (1<<2) /* no memory */ | |
155 | # define DERR_TIMEOUT (1<<9) /* scan timeout has run out */ | |
156 | # define DERR_BAD_CALL (1<<15) /* wrong command */ | |
476be7e2 JH |
157 | |
158 | static const uschar * drweb_re_str = US "infected\\swith\\s*(.+?)$"; | |
159 | static const pcre * drweb_re = NULL; | |
c11d665d | 160 | #endif |
476be7e2 | 161 | |
c11d665d | 162 | #ifndef DISABLE_MAL_FSECURE |
476be7e2 JH |
163 | static const uschar * fsec_re_str = US "\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$"; |
164 | static const pcre * fsec_re = NULL; | |
c11d665d | 165 | #endif |
476be7e2 | 166 | |
c11d665d | 167 | #ifndef DISABLE_MAL_KAV |
476be7e2 JH |
168 | static const uschar * kav_re_sus_str = US "suspicion:\\s*(.+?)\\s*$"; |
169 | static const uschar * kav_re_inf_str = US "infected:\\s*(.+?)\\s*$"; | |
170 | static const pcre * kav_re_sus = NULL; | |
171 | static const pcre * kav_re_inf = NULL; | |
c11d665d | 172 | #endif |
476be7e2 | 173 | |
c11d665d | 174 | #ifndef DISABLE_MAL_AVAST |
476be7e2 | 175 | static const uschar * ava_re_clean_str = US "(?!\\\\)\\t\\[\\+\\]"; |
ad93c40f HSHR |
176 | static const uschar * ava_re_virus_str = US "(?!\\\\)\\t\\[L\\]\\d+\\.0\\t0\\s(.*)"; |
177 | static const uschar * ava_re_error_str = US "(?!\\\\)\\t\\[E\\]\\d+\\.0\\tError\\s\\d+\\s(.*)"; | |
476be7e2 JH |
178 | static const pcre * ava_re_clean = NULL; |
179 | static const pcre * ava_re_virus = NULL; | |
ad93c40f | 180 | static const pcre * ava_re_error = NULL; |
c11d665d | 181 | #endif |
476be7e2 | 182 | |
c11d665d | 183 | #ifndef DISABLE_MAL_FFROT6D |
71b32d41 ACK |
184 | static const uschar * fprot6d_re_error_str = US "^\\d+\\s<(.+?)>$"; |
185 | static const uschar * fprot6d_re_virus_str = US "^\\d+\\s<infected:\\s+(.+?)>\\s+.+$"; | |
186 | static const pcre * fprot6d_re_error = NULL; | |
187 | static const pcre * fprot6d_re_virus = NULL; | |
c11d665d | 188 | #endif |
71b32d41 | 189 | |
476be7e2 JH |
190 | |
191 | ||
192 | /******************************************************************************/ | |
193 | ||
b1f8e4f8 | 194 | /* Routine to check whether a system is big- or little-endian. |
8523533c TK |
195 | Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html |
196 | Needed for proper kavdaemon implementation. Sigh. */ | |
197 | #define BIG_MY_ENDIAN 0 | |
198 | #define LITTLE_MY_ENDIAN 1 | |
b1f8e4f8 JH |
199 | static int test_byte_order(void); |
200 | static inline int | |
201 | test_byte_order() | |
202 | { | |
203 | short int word = 0x0001; | |
5903c6ff | 204 | char *byte = CS &word; |
b1f8e4f8 | 205 | return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN); |
8523533c TK |
206 | } |
207 | ||
b1f8e4f8 | 208 | BOOL malware_ok = FALSE; |
8523533c | 209 | |
8544e77a PP |
210 | /* Gross hacks for the -bmalware option; perhaps we should just create |
211 | the scan directory normally for that case, but look into rigging up the | |
212 | needed header variables if not already set on the command-line? */ | |
213 | extern int spool_mbox_ok; | |
55240832 | 214 | extern uschar spooled_message_id[MESSAGE_ID_LENGTH+1]; |
8544e77a | 215 | |
8544e77a | 216 | |
ad93c40f HSHR |
217 | /* Some (currently avast only) use backslash escaped whitespace, |
218 | this function undoes these escapes */ | |
46682a67 | 219 | |
ad93c40f | 220 | static inline void |
46682a67 JH |
221 | unescape(uschar *p) |
222 | { | |
223 | uschar *p0; | |
224 | for (; *p; ++p) | |
225 | if (*p == '\\' && (isspace(p[1]) || p[1] == '\\')) | |
226 | for (p0 = p; *p0; ++p0) *p0 = p0[1]; | |
ad93c40f | 227 | } |
8544e77a | 228 | |
ad93c40f | 229 | /* --- malware_*_defer --- */ |
b1f8e4f8 | 230 | static inline int |
ad93c40f | 231 | malware_panic_defer(const uschar * str) |
b1f8e4f8 | 232 | { |
8a512ed5 JH |
233 | log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str); |
234 | return DEFER; | |
b1f8e4f8 | 235 | } |
ad93c40f HSHR |
236 | static inline int |
237 | malware_log_defer(const uschar * str) | |
238 | { | |
239 | log_write(0, LOG_MAIN, "malware acl condition: %s", str); | |
240 | return DEFER; | |
241 | } | |
242 | /* --- m_*_defer --- */ | |
243 | static inline int | |
244 | m_panic_defer(struct scan * scanent, const uschar * hostport, | |
0ea02355 | 245 | const uschar * str) |
b1f8e4f8 | 246 | { |
ad93c40f | 247 | return malware_panic_defer(string_sprintf("%s %s : %s", |
0ea02355 | 248 | scanent->name, hostport ? hostport : CUS"", str)); |
b1f8e4f8 | 249 | } |
ad93c40f HSHR |
250 | static inline int |
251 | m_log_defer(struct scan * scanent, const uschar * hostport, | |
252 | const uschar * str) | |
253 | { | |
254 | return malware_log_defer(string_sprintf("%s %s : %s", | |
255 | scanent->name, hostport ? hostport : CUS"", str)); | |
256 | } | |
257 | /* --- m_*_defer_3 */ | |
258 | static inline int | |
259 | m_panic_defer_3(struct scan * scanent, const uschar * hostport, | |
260 | const uschar * str, int fd_to_close) | |
261 | { | |
262 | (void) close(fd_to_close); | |
263 | return m_panic_defer(scanent, hostport, str); | |
264 | } | |
265 | static inline int | |
266 | m_log_defer_3(struct scan * scanent, const uschar * hostport, | |
0ea02355 | 267 | const uschar * str, int fd_to_close) |
b1f8e4f8 | 268 | { |
8a512ed5 | 269 | (void) close(fd_to_close); |
ad93c40f | 270 | return m_log_defer(scanent, hostport, str); |
b1f8e4f8 JH |
271 | } |
272 | ||
273 | /*************************************************/ | |
274 | ||
c11d665d | 275 | #ifndef DISABLE_MAL_CLAM |
b1f8e4f8 JH |
276 | /* Only used by the Clamav code, which is working from a list of servers and |
277 | uses the returned in_addr to get a second connection to the same system. | |
278 | */ | |
279 | static inline int | |
280 | m_tcpsocket(const uschar * hostname, unsigned int port, | |
10ac8d7f | 281 | host_item * host, uschar ** errstr, const blob * fastopen_blob) |
b1f8e4f8 | 282 | { |
4a5cbaff | 283 | return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5, |
10ac8d7f | 284 | host, errstr, fastopen_blob); |
b1f8e4f8 | 285 | } |
c11d665d | 286 | #endif |
b1f8e4f8 | 287 | |
b1f8e4f8 JH |
288 | static int |
289 | m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr) | |
290 | { | |
8a512ed5 JH |
291 | if (send(sock, buf, cnt, 0) < 0) |
292 | { | |
293 | int err = errno; | |
294 | (void)close(sock); | |
295 | *errstr = string_sprintf("unable to send to socket (%s): %s", | |
296 | buf, strerror(err)); | |
297 | return -1; | |
298 | } | |
299 | return sock; | |
b1f8e4f8 JH |
300 | } |
301 | ||
302 | static const pcre * | |
303 | m_pcre_compile(const uschar * re, uschar ** errstr) | |
304 | { | |
8a512ed5 JH |
305 | const uschar * rerror; |
306 | int roffset; | |
307 | const pcre * cre; | |
308 | ||
309 | cre = pcre_compile(CS re, PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
310 | if (!cre) | |
311 | *errstr= string_sprintf("regular expression error in '%s': %s at offset %d", | |
312 | re, rerror, roffset); | |
313 | return cre; | |
b1f8e4f8 JH |
314 | } |
315 | ||
316 | uschar * | |
317 | m_pcre_exec(const pcre * cre, uschar * text) | |
318 | { | |
8a512ed5 JH |
319 | int ovector[10*3]; |
320 | int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0, | |
c11d665d | 321 | ovector, nelem(ovector)); |
8a512ed5 JH |
322 | uschar * substr = NULL; |
323 | if (i >= 2) /* Got it */ | |
324 | pcre_get_substring(CS text, ovector, i, 1, (const char **) &substr); | |
325 | return substr; | |
b1f8e4f8 JH |
326 | } |
327 | ||
328 | static const pcre * | |
55414b25 JH |
329 | m_pcre_nextinlist(const uschar ** list, int * sep, |
330 | char * listerr, uschar ** errstr) | |
b1f8e4f8 | 331 | { |
8a512ed5 JH |
332 | const uschar * list_ele; |
333 | const pcre * cre = NULL; | |
334 | ||
335 | if (!(list_ele = string_nextinlist(list, sep, NULL, 0))) | |
336 | *errstr = US listerr; | |
337 | else | |
ac4d558b JH |
338 | { |
339 | DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "RE: ", | |
340 | string_printing(list_ele)); | |
8a512ed5 | 341 | cre = m_pcre_compile(CUS list_ele, errstr); |
ac4d558b | 342 | } |
8a512ed5 | 343 | return cre; |
b1f8e4f8 JH |
344 | } |
345 | ||
4e71661f JH |
346 | /* |
347 | Simple though inefficient wrapper for reading a line. Drop CRs and the | |
348 | trailing newline. Can return early on buffer full. Null-terminate. | |
349 | Apply initial timeout if no data ready. | |
350 | ||
0f0c8159 JH |
351 | Return: number of chars - zero for an empty line |
352 | -1 on EOF | |
353 | -2 on timeout or error | |
4e71661f JH |
354 | */ |
355 | static int | |
356 | recv_line(int fd, uschar * buffer, int bsize, int tmo) | |
357 | { | |
358 | uschar * p = buffer; | |
359 | ssize_t rcv; | |
0f0c8159 | 360 | BOOL ok = FALSE; |
4e71661f JH |
361 | |
362 | if (!fd_ready(fd, tmo-time(NULL))) | |
0f0c8159 | 363 | return -2; |
4e71661f | 364 | |
0f0c8159 | 365 | /*XXX tmo handling assumes we always get a whole line */ |
4e71661f | 366 | /* read until \n */ |
0f0c8159 | 367 | errno = 0; |
4e71661f JH |
368 | while ((rcv = read(fd, p, 1)) > 0) |
369 | { | |
0f0c8159 | 370 | ok = TRUE; |
4e71661f JH |
371 | if (p-buffer > bsize-2) break; |
372 | if (*p == '\n') break; | |
373 | if (*p != '\r') p++; | |
374 | } | |
0f0c8159 JH |
375 | if (!ok) |
376 | { | |
e1d04f48 | 377 | DEBUG(D_acl) debug_printf_indent("Malware scan: read %s (%s)\n", |
0f0c8159 JH |
378 | rcv==0 ? "EOF" : "error", strerror(errno)); |
379 | return rcv==0 ? -1 : -2; | |
380 | } | |
4e71661f JH |
381 | *p = '\0'; |
382 | ||
e1d04f48 | 383 | DEBUG(D_acl) debug_printf_indent("Malware scan: read '%s'\n", buffer); |
4e71661f JH |
384 | return p - buffer; |
385 | } | |
386 | ||
387 | /* return TRUE iff size as requested */ | |
388 | static BOOL | |
389 | recv_len(int sock, void * buf, int size, int tmo) | |
390 | { | |
391 | return fd_ready(sock, tmo-time(NULL)) | |
392 | ? recv(sock, buf, size, 0) == size | |
393 | : FALSE; | |
394 | } | |
395 | ||
396 | ||
0f0c8159 | 397 | |
c11d665d | 398 | #ifndef DISABLE_MAL_MKS |
0f0c8159 JH |
399 | /* ============= private routines for the "mksd" scanner type ============== */ |
400 | ||
c11d665d | 401 | # include <sys/uio.h> |
0f0c8159 JH |
402 | |
403 | static inline int | |
404 | mksd_writev (int sock, struct iovec * iov, int iovcnt) | |
405 | { | |
406 | int i; | |
407 | ||
408 | for (;;) | |
409 | { | |
410 | do | |
411 | i = writev (sock, iov, iovcnt); | |
412 | while (i < 0 && errno == EINTR); | |
413 | if (i <= 0) | |
414 | { | |
ad93c40f | 415 | (void) malware_panic_defer( |
0f0c8159 JH |
416 | US"unable to write to mksd UNIX socket (/var/run/mksd/socket)"); |
417 | return -1; | |
418 | } | |
419 | for (;;) /* check for short write */ | |
420 | if (i >= iov->iov_len) | |
421 | { | |
422 | if (--iovcnt == 0) | |
423 | return 0; | |
424 | i -= iov->iov_len; | |
425 | iov++; | |
426 | } | |
427 | else | |
428 | { | |
429 | iov->iov_len -= i; | |
430 | iov->iov_base = CS iov->iov_base + i; | |
431 | break; | |
432 | } | |
433 | } | |
434 | } | |
435 | ||
436 | static inline int | |
437 | mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, int tmo) | |
438 | { | |
439 | int offset = 0; | |
440 | int i; | |
441 | ||
442 | do | |
443 | { | |
444 | i = ip_recv(sock, av_buffer+offset, av_buffer_size-offset, tmo-time(NULL)); | |
445 | if (i <= 0) | |
446 | { | |
ad93c40f | 447 | (void) malware_panic_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)"); |
0f0c8159 JH |
448 | return -1; |
449 | } | |
450 | ||
451 | offset += i; | |
452 | /* offset == av_buffer_size -> buffer full */ | |
453 | if (offset == av_buffer_size) | |
454 | { | |
ad93c40f | 455 | (void) malware_panic_defer(US"malformed reply received from mksd"); |
0f0c8159 JH |
456 | return -1; |
457 | } | |
458 | } while (av_buffer[offset-1] != '\n'); | |
459 | ||
460 | av_buffer[offset] = '\0'; | |
461 | return offset; | |
462 | } | |
463 | ||
464 | static inline int | |
465 | mksd_parse_line(struct scan * scanent, char * line) | |
466 | { | |
467 | char *p; | |
468 | ||
469 | switch (*line) | |
470 | { | |
471 | case 'O': /* OK */ | |
472 | return OK; | |
473 | ||
474 | case 'E': | |
475 | case 'A': /* ERR */ | |
476 | if ((p = strchr (line, '\n')) != NULL) | |
477 | *p = '\0'; | |
ad93c40f | 478 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
479 | string_sprintf("scanner failed: %s", line)); |
480 | ||
481 | default: /* VIR */ | |
482 | if ((p = strchr (line, '\n')) != NULL) | |
483 | { | |
484 | *p = '\0'; | |
485 | if ( p-line > 5 | |
486 | && line[3] == ' ' | |
487 | && (p = strchr(line+4, ' ')) != NULL | |
488 | && p-line > 4 | |
489 | ) | |
490 | { | |
491 | *p = '\0'; | |
492 | malware_name = string_copy(US line+4); | |
493 | return OK; | |
494 | } | |
495 | } | |
ad93c40f | 496 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
497 | string_sprintf("malformed reply received: %s", line)); |
498 | } | |
499 | } | |
500 | ||
501 | static int | |
502 | mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename, | |
503 | int tmo) | |
504 | { | |
505 | struct iovec iov[3]; | |
506 | const char *cmd = "MSQ\n"; | |
507 | uschar av_buffer[1024]; | |
508 | ||
509 | iov[0].iov_base = (void *) cmd; | |
510 | iov[0].iov_len = 3; | |
511 | iov[1].iov_base = (void *) scan_filename; | |
512 | iov[1].iov_len = Ustrlen(scan_filename); | |
513 | iov[2].iov_base = (void *) (cmd + 3); | |
514 | iov[2].iov_len = 1; | |
515 | ||
516 | if (mksd_writev (sock, iov, 3) < 0) | |
517 | return DEFER; | |
518 | ||
519 | if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0) | |
520 | return DEFER; | |
521 | ||
522 | return mksd_parse_line (scanent, CS av_buffer); | |
523 | } | |
c11d665d | 524 | #endif /* MKSD */ |
0f0c8159 | 525 | |
8a512ed5 | 526 | |
c11d665d | 527 | #ifndef DISABLE_MAL_CLAM |
8a512ed5 JH |
528 | static int |
529 | clamd_option(clamd_address * cd, const uschar * optstr, int * subsep) | |
530 | { | |
531 | uschar * s; | |
532 | ||
533 | cd->retry = 0; | |
534 | while ((s = string_nextinlist(&optstr, subsep, NULL, 0))) | |
8a512ed5 JH |
535 | if (Ustrncmp(s, "retry=", 6) == 0) |
536 | { | |
537 | int sec = readconf_readtime((s += 6), '\0', FALSE); | |
538 | if (sec < 0) | |
539 | return FAIL; | |
540 | cd->retry = sec; | |
541 | } | |
542 | else | |
543 | return FAIL; | |
93a6fce2 | 544 | return OK; |
8a512ed5 | 545 | } |
c11d665d JH |
546 | #endif |
547 | ||
548 | ||
8a512ed5 | 549 | |
8544e77a PP |
550 | /************************************************* |
551 | * Scan content for malware * | |
552 | *************************************************/ | |
553 | ||
554 | /* This is an internal interface for scanning an email; the normal interface | |
555 | is via malware(), or there's malware_in_file() used for testing/debugging. | |
556 | ||
557 | Arguments: | |
0f0c8159 | 558 | malware_re match condition for "malware=" |
040721f2 JH |
559 | scan_filename the file holding the email to be scanned, if we're faking |
560 | this up for the -bmalware test, else NULL | |
0f0c8159 | 561 | timeout if nonzero, non-default timeoutl |
8544e77a PP |
562 | |
563 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) | |
564 | where true means malware was found (condition applies) | |
565 | */ | |
b1f8e4f8 | 566 | static int |
040721f2 JH |
567 | malware_internal(const uschar * malware_re, const uschar * scan_filename, |
568 | int timeout) | |
b1f8e4f8 | 569 | { |
0f0c8159 | 570 | int sep = 0; |
55414b25 | 571 | const uschar *av_scanner_work = av_scanner; |
0f0c8159 | 572 | uschar *scanner_name; |
0f0c8159 JH |
573 | unsigned long mbox_size; |
574 | FILE *mbox_file; | |
575 | const pcre *re; | |
576 | uschar * errstr; | |
577 | struct scan * scanent; | |
578 | const uschar * scanner_options; | |
579 | int sock = -1; | |
580 | time_t tmo; | |
040721f2 | 581 | uschar * eml_filename, * eml_dir; |
0f0c8159 | 582 | |
040721f2 JH |
583 | if (!malware_re) |
584 | return FAIL; /* empty means "don't match anything" */ | |
585 | ||
586 | /* Ensure the eml mbox file is spooled up */ | |
587 | ||
588 | if (!(mbox_file = spool_mbox(&mbox_size, scan_filename, &eml_filename))) | |
ad93c40f | 589 | return malware_panic_defer(US"error while creating mbox spool file"); |
0f0c8159 | 590 | |
040721f2 JH |
591 | /* None of our current scanners need the mbox file as a stream (they use |
592 | the name), so we can close it right away. Get the directory too. */ | |
0f0c8159 | 593 | |
040721f2 JH |
594 | (void) fclose(mbox_file); |
595 | eml_dir = string_copyn(eml_filename, Ustrrchr(eml_filename, '/') - eml_filename); | |
0f0c8159 JH |
596 | |
597 | /* parse 1st option */ | |
040721f2 | 598 | if (strcmpic(malware_re, US"false") == 0 || Ustrcmp(malware_re,"0") == 0) |
0f0c8159 JH |
599 | return FAIL; /* explicitly no matching */ |
600 | ||
601 | /* special cases (match anything except empty) */ | |
476be7e2 JH |
602 | if ( strcmpic(malware_re,US"true") == 0 |
603 | || Ustrcmp(malware_re,"*") == 0 | |
604 | || Ustrcmp(malware_re,"1") == 0 | |
605 | ) | |
606 | { | |
607 | if ( !malware_default_re | |
608 | && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr))) | |
ad93c40f | 609 | return malware_panic_defer(errstr); |
0f0c8159 | 610 | malware_re = malware_regex_default; |
476be7e2 JH |
611 | re = malware_default_re; |
612 | } | |
0f0c8159 JH |
613 | |
614 | /* compile the regex, see if it works */ | |
476be7e2 | 615 | else if (!(re = m_pcre_compile(malware_re, &errstr))) |
ad93c40f | 616 | return malware_panic_defer(errstr); |
0f0c8159 JH |
617 | |
618 | /* if av_scanner starts with a dollar, expand it first */ | |
619 | if (*av_scanner == '$') | |
620 | { | |
621 | if (!(av_scanner_work = expand_string(av_scanner))) | |
ad93c40f | 622 | return malware_panic_defer( |
0f0c8159 JH |
623 | string_sprintf("av_scanner starts with $, but expansion failed: %s", |
624 | expand_string_message)); | |
b1f8e4f8 | 625 | |
0f0c8159 | 626 | DEBUG(D_acl) |
e1d04f48 | 627 | debug_printf_indent("Expanded av_scanner global: %s\n", av_scanner_work); |
0f0c8159 JH |
628 | /* disable result caching in this case */ |
629 | malware_name = NULL; | |
630 | malware_ok = FALSE; | |
8523533c TK |
631 | } |
632 | ||
0f0c8159 JH |
633 | /* Do not scan twice (unless av_scanner is dynamic). */ |
634 | if (!malware_ok) | |
635 | { | |
636 | /* find the scanner type from the av_scanner option */ | |
637 | if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0))) | |
ad93c40f | 638 | return malware_panic_defer(US"av_scanner configuration variable is empty"); |
0f0c8159 JH |
639 | if (!timeout) timeout = MALWARE_TIMEOUT; |
640 | tmo = time(NULL) + timeout; | |
641 | ||
3e60dd41 JH |
642 | for (scanent = m_scans; ; scanent++) |
643 | { | |
0f0c8159 | 644 | if (!scanent->name) |
ad93c40f | 645 | return malware_panic_defer(string_sprintf("unknown scanner type '%s'", |
0f0c8159 JH |
646 | scanner_name)); |
647 | if (strcmpic(scanner_name, US scanent->name) != 0) | |
648 | continue; | |
ac4d558b JH |
649 | DEBUG(D_acl) debug_printf_indent("Malware scan: %s tmo=%s\n", |
650 | scanner_name, readconf_printtime(timeout)); | |
651 | ||
0f0c8159 JH |
652 | if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0))) |
653 | scanner_options = scanent->options_default; | |
654 | if (scanent->conn == MC_NONE) | |
b1f8e4f8 | 655 | break; |
ac4d558b JH |
656 | |
657 | DEBUG(D_acl) debug_printf_indent("%15s%10s%s\n", "", "socket: ", scanner_options); | |
0f0c8159 JH |
658 | switch(scanent->conn) |
659 | { | |
8c0d5ae8 JH |
660 | case MC_TCP: sock = ip_tcpsocket(scanner_options, &errstr, 5); break; |
661 | case MC_UNIX: sock = ip_unixsocket(scanner_options, &errstr); break; | |
3e60dd41 | 662 | case MC_STRM: sock = ip_streamsocket(scanner_options, &errstr, 5); break; |
0f0c8159 | 663 | default: /* compiler quietening */ break; |
384152a6 | 664 | } |
0f0c8159 | 665 | if (sock < 0) |
ad93c40f | 666 | return m_panic_defer(scanent, CUS callout_address, errstr); |
0f0c8159 JH |
667 | break; |
668 | } | |
8e669ac1 | 669 | |
0f0c8159 JH |
670 | switch (scanent->scancode) |
671 | { | |
c11d665d | 672 | #ifndef DISABLE_MAL_FFROTD |
0f0c8159 | 673 | case M_FPROTD: /* "f-protd" scanner type -------------------------------- */ |
b1f8e4f8 | 674 | { |
0f0c8159 JH |
675 | uschar *fp_scan_option; |
676 | unsigned int detected=0, par_count=0; | |
677 | uschar * scanrequest; | |
678 | uschar buf[32768], *strhelper, *strhelper2; | |
679 | uschar * malware_name_internal = NULL; | |
680 | int len; | |
b1f8e4f8 | 681 | |
0f0c8159 | 682 | scanrequest = string_sprintf("GET %s", eml_filename); |
b1f8e4f8 | 683 | |
0f0c8159 JH |
684 | while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep, |
685 | NULL, 0))) | |
686 | { | |
687 | scanrequest = string_sprintf("%s%s%s", scanrequest, | |
688 | par_count ? "%20" : "?", fp_scan_option); | |
689 | par_count++; | |
690 | } | |
691 | scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest); | |
e1d04f48 | 692 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n", |
0f0c8159 | 693 | scanner_name, scanrequest); |
b1f8e4f8 | 694 | |
0f0c8159 JH |
695 | /* send scan request */ |
696 | if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0) | |
ad93c40f | 697 | return m_panic_defer(scanent, CUS callout_address, errstr); |
b1f8e4f8 | 698 | |
0f0c8159 JH |
699 | while ((len = recv_line(sock, buf, sizeof(buf), tmo)) >= 0) |
700 | if (len > 0) | |
701 | { | |
702 | if (Ustrstr(buf, US"<detected type=\"") != NULL) | |
703 | detected = 1; | |
704 | else if (detected && (strhelper = Ustrstr(buf, US"<name>"))) | |
4e71661f | 705 | { |
0f0c8159 | 706 | if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL) |
4e71661f | 707 | { |
0f0c8159 JH |
708 | *strhelper2 = '\0'; |
709 | malware_name_internal = string_copy(strhelper+6); | |
4e71661f JH |
710 | } |
711 | } | |
0f0c8159 | 712 | else if (Ustrstr(buf, US"<summary code=\"")) |
4e71661f | 713 | { |
0f0c8159 JH |
714 | malware_name = Ustrstr(buf, US"<summary code=\"11\">") |
715 | ? malware_name_internal : NULL; | |
716 | break; | |
4e71661f | 717 | } |
0f0c8159 JH |
718 | } |
719 | if (len < -1) | |
720 | { | |
721 | (void)close(sock); | |
722 | return DEFER; | |
723 | } | |
724 | break; | |
725 | } /* f-protd */ | |
c11d665d JH |
726 | #endif |
727 | ||
728 | #ifndef DISABLE_MAL_FFROT6D | |
729 | case M_FPROT6D: /* "f-prot6d" scanner type ----------------------------------- */ | |
730 | { | |
731 | int bread; | |
732 | uschar * e; | |
733 | uschar * linebuffer; | |
734 | uschar * scanrequest; | |
735 | uschar av_buffer[1024]; | |
736 | ||
737 | if ((!fprot6d_re_virus && !(fprot6d_re_virus = m_pcre_compile(fprot6d_re_virus_str, &errstr))) | |
738 | || (!fprot6d_re_error && !(fprot6d_re_error = m_pcre_compile(fprot6d_re_error_str, &errstr)))) | |
ad93c40f | 739 | return malware_panic_defer(errstr); |
c11d665d JH |
740 | |
741 | scanrequest = string_sprintf("SCAN FILE %s\n", eml_filename); | |
742 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n", | |
743 | scanner_name, scanrequest); | |
744 | ||
745 | if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest), &errstr) < 0) | |
ad93c40f | 746 | return m_panic_defer(scanent, CUS callout_address, errstr); |
c11d665d JH |
747 | |
748 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); | |
749 | ||
750 | if (bread <= 0) | |
ad93c40f | 751 | return m_panic_defer_3(scanent, CUS callout_address, |
c11d665d JH |
752 | string_sprintf("unable to read from socket (%s)", strerror(errno)), |
753 | sock); | |
754 | ||
755 | if (bread == sizeof(av_buffer)) | |
ad93c40f | 756 | return m_panic_defer_3(scanent, CUS callout_address, |
c11d665d JH |
757 | US"buffer too small", sock); |
758 | ||
759 | av_buffer[bread] = '\0'; | |
760 | linebuffer = string_copy(av_buffer); | |
761 | ||
762 | m_sock_send(sock, US"QUIT\n", 5, 0); | |
763 | ||
764 | if ((e = m_pcre_exec(fprot6d_re_error, linebuffer))) | |
ad93c40f | 765 | return m_panic_defer_3(scanent, CUS callout_address, |
c11d665d | 766 | string_sprintf("scanner reported error (%s)", e), sock); |
b1f8e4f8 | 767 | |
c11d665d JH |
768 | if (!(malware_name = m_pcre_exec(fprot6d_re_virus, linebuffer))) |
769 | malware_name = NULL; | |
770 | ||
771 | break; | |
772 | } /* f-prot6d */ | |
773 | #endif | |
774 | ||
775 | #ifndef DISABLE_MAL_DRWEB | |
0f0c8159 JH |
776 | case M_DRWEB: /* "drweb" scanner type ----------------------------------- */ |
777 | /* v0.1 - added support for tcp sockets */ | |
778 | /* v0.0 - initial release -- support for unix sockets */ | |
779 | { | |
780 | int result; | |
781 | off_t fsize; | |
782 | unsigned int fsize_uint; | |
783 | uschar * tmpbuf, *drweb_fbuf; | |
784 | int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd, | |
785 | drweb_vnum, drweb_slen, drweb_fin = 0x0000; | |
0f0c8159 JH |
786 | |
787 | /* prepare variables */ | |
788 | drweb_cmd = htonl(DRWEBD_SCAN_CMD); | |
789 | drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL); | |
790 | ||
791 | if (*scanner_options != '/') | |
792 | { | |
793 | /* calc file size */ | |
794 | if ((drweb_fd = open(CCS eml_filename, O_RDONLY)) == -1) | |
ad93c40f | 795 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
796 | string_sprintf("can't open spool file %s: %s", |
797 | eml_filename, strerror(errno)), | |
798 | sock); | |
b1f8e4f8 | 799 | |
0f0c8159 JH |
800 | if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1) |
801 | { | |
d315eda1 JH |
802 | int err; |
803 | badseek: err = errno; | |
b1f8e4f8 | 804 | (void)close(drweb_fd); |
ad93c40f | 805 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
806 | string_sprintf("can't seek spool file %s: %s", |
807 | eml_filename, strerror(err)), | |
808 | sock); | |
809 | } | |
810 | fsize_uint = (unsigned int) fsize; | |
811 | if ((off_t)fsize_uint != fsize) | |
812 | { | |
b1f8e4f8 | 813 | (void)close(drweb_fd); |
ad93c40f | 814 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
815 | string_sprintf("seeking spool file %s, size overflow", |
816 | eml_filename), | |
817 | sock); | |
4e71661f | 818 | } |
0f0c8159 | 819 | drweb_slen = htonl(fsize); |
d315eda1 JH |
820 | if (lseek(drweb_fd, 0, SEEK_SET) < 0) |
821 | goto badseek; | |
0f0c8159 | 822 | |
e1d04f48 | 823 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s remote scan [%s]\n", |
0f0c8159 JH |
824 | scanner_name, scanner_options); |
825 | ||
826 | /* send scan request */ | |
827 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
828 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
829 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) || | |
830 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0)) | |
4e71661f | 831 | { |
0f0c8159 | 832 | (void)close(drweb_fd); |
ad93c40f | 833 | return m_panic_defer_3(scanent, CUS callout_address, string_sprintf( |
0f0c8159 JH |
834 | "unable to send commands to socket (%s)", scanner_options), |
835 | sock); | |
4e71661f | 836 | } |
8e669ac1 | 837 | |
40c90bca | 838 | if (!(drweb_fbuf = US malloc(fsize_uint))) |
0f0c8159 JH |
839 | { |
840 | (void)close(drweb_fd); | |
ad93c40f | 841 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
842 | string_sprintf("unable to allocate memory %u for file (%s)", |
843 | fsize_uint, eml_filename), | |
844 | sock); | |
845 | } | |
b1f8e4f8 | 846 | |
0f0c8159 JH |
847 | if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1) |
848 | { | |
849 | int err = errno; | |
850 | (void)close(drweb_fd); | |
851 | free(drweb_fbuf); | |
ad93c40f | 852 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
853 | string_sprintf("can't read spool file %s: %s", |
854 | eml_filename, strerror(err)), | |
855 | sock); | |
856 | } | |
857 | (void)close(drweb_fd); | |
b1f8e4f8 | 858 | |
0f0c8159 JH |
859 | /* send file body to socket */ |
860 | if (send(sock, drweb_fbuf, fsize, 0) < 0) | |
4e71661f | 861 | { |
0f0c8159 | 862 | free(drweb_fbuf); |
ad93c40f | 863 | return m_panic_defer_3(scanent, CUS callout_address, string_sprintf( |
0f0c8159 JH |
864 | "unable to send file body to socket (%s)", scanner_options), |
865 | sock); | |
866 | } | |
0f0c8159 JH |
867 | } |
868 | else | |
869 | { | |
870 | drweb_slen = htonl(Ustrlen(eml_filename)); | |
b1f8e4f8 | 871 | |
e1d04f48 | 872 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s local scan [%s]\n", |
0f0c8159 | 873 | scanner_name, scanner_options); |
b1f8e4f8 | 874 | |
0f0c8159 JH |
875 | /* send scan request */ |
876 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
877 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
878 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) || | |
879 | (send(sock, eml_filename, Ustrlen(eml_filename), 0) < 0) || | |
880 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0)) | |
ad93c40f | 881 | return m_panic_defer_3(scanent, CUS callout_address, string_sprintf( |
0f0c8159 JH |
882 | "unable to send commands to socket (%s)", scanner_options), |
883 | sock); | |
884 | } | |
b1f8e4f8 | 885 | |
0f0c8159 JH |
886 | /* wait for result */ |
887 | if (!recv_len(sock, &drweb_rc, sizeof(drweb_rc), tmo)) | |
ad93c40f | 888 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
889 | US"unable to read return code", sock); |
890 | drweb_rc = ntohl(drweb_rc); | |
891 | ||
892 | if (!recv_len(sock, &drweb_vnum, sizeof(drweb_vnum), tmo)) | |
ad93c40f | 893 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
894 | US"unable to read the number of viruses", sock); |
895 | drweb_vnum = ntohl(drweb_vnum); | |
896 | ||
897 | /* "virus(es) found" if virus number is > 0 */ | |
898 | if (drweb_vnum) | |
899 | { | |
900 | int i; | |
acec9514 | 901 | gstring * g = NULL; |
b1f8e4f8 | 902 | |
0f0c8159 JH |
903 | /* setup default virus name */ |
904 | malware_name = US"unknown"; | |
b1f8e4f8 | 905 | |
0f0c8159 | 906 | /* set up match regex */ |
476be7e2 JH |
907 | if (!drweb_re) |
908 | drweb_re = m_pcre_compile(drweb_re_str, &errstr); | |
b1f8e4f8 | 909 | |
0f0c8159 JH |
910 | /* read and concatenate virus names into one string */ |
911 | for (i = 0; i < drweb_vnum; i++) | |
4e71661f | 912 | { |
acec9514 JH |
913 | int ovector[10*3]; |
914 | ||
0f0c8159 JH |
915 | /* read the size of report */ |
916 | if (!recv_len(sock, &drweb_slen, sizeof(drweb_slen), tmo)) | |
ad93c40f | 917 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
918 | US"cannot read report size", sock); |
919 | drweb_slen = ntohl(drweb_slen); | |
920 | tmpbuf = store_get(drweb_slen); | |
b1f8e4f8 | 921 | |
0f0c8159 JH |
922 | /* read report body */ |
923 | if (!recv_len(sock, tmpbuf, drweb_slen, tmo)) | |
ad93c40f | 924 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
925 | US"cannot read report string", sock); |
926 | tmpbuf[drweb_slen] = '\0'; | |
8544e77a | 927 | |
0f0c8159 JH |
928 | /* try matcher on the line, grab substring */ |
929 | result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, | |
c11d665d | 930 | ovector, nelem(ovector)); |
0f0c8159 JH |
931 | if (result >= 2) |
932 | { | |
933 | const char * pre_malware_nb; | |
8e669ac1 | 934 | |
0f0c8159 | 935 | pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb); |
8e669ac1 | 936 | |
0f0c8159 | 937 | if (i==0) /* the first name we just copy to malware_name */ |
b2bcdd35 | 938 | g = string_cat(NULL, US pre_malware_nb); |
8e669ac1 | 939 | |
acec9514 | 940 | /*XXX could be string_append_listele? */ |
0f0c8159 | 941 | else /* concatenate each new virus name to previous */ |
acec9514 | 942 | g = string_append(g, 2, "/", pre_malware_nb); |
8e669ac1 | 943 | |
0f0c8159 JH |
944 | pcre_free_substring(pre_malware_nb); |
945 | } | |
946 | } | |
acec9514 | 947 | malware_name = string_from_gstring(g); |
0f0c8159 JH |
948 | } |
949 | else | |
950 | { | |
951 | const char *drweb_s = NULL; | |
952 | ||
953 | if (drweb_rc & DERR_READ_ERR) drweb_s = "read error"; | |
954 | if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory"; | |
955 | if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout"; | |
956 | if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command"; | |
957 | /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED. | |
958 | * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM, | |
959 | * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR | |
960 | * and others are ignored */ | |
961 | if (drweb_s) | |
ad93c40f | 962 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
963 | string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s), |
964 | sock); | |
8e669ac1 | 965 | |
0f0c8159 | 966 | /* no virus found */ |
b1f8e4f8 | 967 | malware_name = NULL; |
0f0c8159 JH |
968 | } |
969 | break; | |
970 | } /* drweb */ | |
c11d665d | 971 | #endif |
8e669ac1 | 972 | |
c11d665d | 973 | #ifndef DISABLE_MAL_AVE |
0f0c8159 JH |
974 | case M_AVES: /* "aveserver" scanner type -------------------------------- */ |
975 | { | |
976 | uschar buf[32768]; | |
977 | int result; | |
8544e77a | 978 | |
0f0c8159 JH |
979 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ |
980 | buf[0] = 0; | |
981 | recv_line(sock, buf, sizeof(buf), tmo); | |
8544e77a | 982 | |
0f0c8159 | 983 | if (buf[0] != '2') /* aveserver is having problems */ |
ad93c40f | 984 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 | 985 | string_sprintf("unavailable (Responded: %s).", |
5903c6ff | 986 | ((buf[0] != 0) ? buf : US "nothing") ), |
0f0c8159 | 987 | sock); |
8e669ac1 | 988 | |
0f0c8159 JH |
989 | /* prepare our command */ |
990 | (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n", | |
991 | eml_filename); | |
992 | ||
993 | /* and send it */ | |
e1d04f48 | 994 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s %s\n", |
0f0c8159 JH |
995 | scanner_name, buf); |
996 | if (m_sock_send(sock, buf, Ustrlen(buf), &errstr) < 0) | |
ad93c40f | 997 | return m_panic_defer(scanent, CUS callout_address, errstr); |
0f0c8159 JH |
998 | |
999 | malware_name = NULL; | |
1000 | result = 0; | |
1001 | /* read response lines, find malware name and final response */ | |
1002 | while (recv_line(sock, buf, sizeof(buf), tmo) > 0) | |
1003 | { | |
1004 | if (buf[0] == '2') | |
1005 | break; | |
1006 | if (buf[0] == '5') /* aveserver is having problems */ | |
4e71661f | 1007 | { |
ad93c40f | 1008 | result = m_panic_defer(scanent, CUS callout_address, |
0f0c8159 JH |
1009 | string_sprintf("unable to scan file %s (Responded: %s).", |
1010 | eml_filename, buf)); | |
1011 | break; | |
4e71661f | 1012 | } |
0f0c8159 JH |
1013 | if (Ustrncmp(buf,"322",3) == 0) |
1014 | { | |
1015 | uschar *p = Ustrchr(&buf[4], ' '); | |
1016 | *p = '\0'; | |
1017 | malware_name = string_copy(&buf[4]); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | if (m_sock_send(sock, US"quit\r\n", 6, &errstr) < 0) | |
ad93c40f | 1022 | return m_panic_defer(scanent, CUS callout_address, errstr); |
0f0c8159 JH |
1023 | |
1024 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ | |
1025 | buf[0] = 0; | |
1026 | recv_line(sock, buf, sizeof(buf), tmo); | |
1027 | ||
1028 | if (buf[0] != '2') /* aveserver is having problems */ | |
ad93c40f | 1029 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 | 1030 | string_sprintf("unable to quit dialogue (Responded: %s).", |
5903c6ff | 1031 | ((buf[0] != 0) ? buf : US "nothing") ), |
0f0c8159 JH |
1032 | sock); |
1033 | ||
1034 | if (result == DEFER) | |
1035 | { | |
1036 | (void)close(sock); | |
1037 | return DEFER; | |
1038 | } | |
1039 | break; | |
b1f8e4f8 | 1040 | } /* aveserver */ |
c11d665d | 1041 | #endif |
8e669ac1 | 1042 | |
c11d665d | 1043 | #ifndef DISABLE_MAL_FSECURE |
b1f8e4f8 JH |
1044 | case M_FSEC: /* "fsecure" scanner type ---------------------------------- */ |
1045 | { | |
0f0c8159 JH |
1046 | int i, j, bread = 0; |
1047 | uschar * file_name; | |
1048 | uschar av_buffer[1024]; | |
0f0c8159 JH |
1049 | static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n", |
1050 | US"CONFIGURE\tTIMEOUT\t0\n", | |
1051 | US"CONFIGURE\tMAXARCH\t5\n", | |
1052 | US"CONFIGURE\tMIME\t1\n" }; | |
1053 | ||
1054 | malware_name = NULL; | |
1055 | ||
e1d04f48 | 1056 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n", |
0f0c8159 JH |
1057 | scanner_name, scanner_options); |
1058 | /* pass options */ | |
1059 | memset(av_buffer, 0, sizeof(av_buffer)); | |
c11d665d | 1060 | for (i = 0; i != nelem(cmdopt); i++) |
0f0c8159 | 1061 | { |
b1f8e4f8 | 1062 | |
0f0c8159 | 1063 | if (m_sock_send(sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0) |
ad93c40f | 1064 | return m_panic_defer(scanent, CUS callout_address, errstr); |
b1f8e4f8 | 1065 | |
0f0c8159 JH |
1066 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); |
1067 | if (bread > 0) av_buffer[bread]='\0'; | |
1068 | if (bread < 0) | |
ad93c40f | 1069 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1070 | string_sprintf("unable to read answer %d (%s)", i, strerror(errno)), |
1071 | sock); | |
1072 | for (j = 0; j < bread; j++) | |
1073 | if (av_buffer[j] == '\r' || av_buffer[j] == '\n') | |
1074 | av_buffer[j] ='@'; | |
1075 | } | |
8e669ac1 | 1076 | |
0f0c8159 JH |
1077 | /* pass the mailfile to fsecure */ |
1078 | file_name = string_sprintf("SCAN\t%s\n", eml_filename); | |
b1f8e4f8 | 1079 | |
0f0c8159 | 1080 | if (m_sock_send(sock, file_name, Ustrlen(file_name), &errstr) < 0) |
ad93c40f | 1081 | return m_panic_defer(scanent, CUS callout_address, errstr); |
b1f8e4f8 | 1082 | |
0f0c8159 JH |
1083 | /* set up match */ |
1084 | /* todo also SUSPICION\t */ | |
476be7e2 JH |
1085 | if (!fsec_re) |
1086 | fsec_re = m_pcre_compile(fsec_re_str, &errstr); | |
b1f8e4f8 | 1087 | |
0f0c8159 JH |
1088 | /* read report, linewise. Apply a timeout as the Fsecure daemon |
1089 | sometimes wants an answer to "PING" but they won't tell us what */ | |
fd02dc0e | 1090 | { |
0f0c8159 JH |
1091 | uschar * p = av_buffer; |
1092 | uschar * q; | |
fd02dc0e | 1093 | |
0f0c8159 JH |
1094 | for (;;) |
1095 | { | |
80591636 | 1096 | errno = ETIMEDOUT; |
0f0c8159 JH |
1097 | i = av_buffer+sizeof(av_buffer)-p; |
1098 | if ((bread= ip_recv(sock, p, i-1, tmo-time(NULL))) < 0) | |
ad93c40f | 1099 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1100 | string_sprintf("unable to read result (%s)", strerror(errno)), |
1101 | sock); | |
b1f8e4f8 | 1102 | |
755762fd | 1103 | for (p[bread] = '\0'; (q = Ustrchr(p, '\n')); p = q+1) |
0f0c8159 JH |
1104 | { |
1105 | *q = '\0'; | |
fd02dc0e | 1106 | |
0f0c8159 JH |
1107 | /* Really search for virus again? */ |
1108 | if (!malware_name) | |
1109 | /* try matcher on the line, grab substring */ | |
476be7e2 | 1110 | malware_name = m_pcre_exec(fsec_re, p); |
fd02dc0e | 1111 | |
0f0c8159 JH |
1112 | if (Ustrstr(p, "OK\tScan ok.")) |
1113 | goto fsec_found; | |
1114 | } | |
fd02dc0e | 1115 | |
0f0c8159 JH |
1116 | /* copy down the trailing partial line then read another chunk */ |
1117 | i = av_buffer+sizeof(av_buffer)-p; | |
1118 | memmove(av_buffer, p, i); | |
1119 | p = av_buffer+i; | |
fd02dc0e | 1120 | } |
b1f8e4f8 | 1121 | } |
fd02dc0e JH |
1122 | |
1123 | fsec_found: | |
b1f8e4f8 JH |
1124 | break; |
1125 | } /* fsecure */ | |
c11d665d | 1126 | #endif |
599dcb77 | 1127 | |
c11d665d | 1128 | #ifndef DISABLE_MAL_KAV |
b1f8e4f8 JH |
1129 | case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */ |
1130 | { | |
0f0c8159 JH |
1131 | time_t t; |
1132 | uschar tmpbuf[1024]; | |
1133 | uschar * scanrequest; | |
1134 | int kav_rc; | |
2decbec9 RC |
1135 | unsigned long kav_reportlen; |
1136 | int bread; | |
0f0c8159 JH |
1137 | const pcre *kav_re; |
1138 | uschar *p; | |
1139 | ||
1140 | /* get current date and time, build scan request */ | |
1141 | time(&t); | |
1142 | /* pdp note: before the eml_filename parameter, this scanned the | |
1143 | directory; not finding documentation, so we'll strip off the directory. | |
1144 | The side-effect is that the test framework scanning may end up in | |
1145 | scanning more than was requested, but for the normal interface, this is | |
1146 | fine. */ | |
1147 | ||
1148 | strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t)); | |
1149 | scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename); | |
1150 | p = Ustrrchr(scanrequest, '/'); | |
1151 | if (p) | |
1152 | *p = '\0'; | |
1153 | ||
e1d04f48 | 1154 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n", |
0f0c8159 JH |
1155 | scanner_name, scanner_options); |
1156 | ||
1157 | /* send scan request */ | |
1158 | if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0) | |
ad93c40f | 1159 | return m_panic_defer(scanent, CUS callout_address, errstr); |
b1f8e4f8 | 1160 | |
0f0c8159 JH |
1161 | /* wait for result */ |
1162 | if (!recv_len(sock, tmpbuf, 2, tmo)) | |
ad93c40f | 1163 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 | 1164 | US"unable to read 2 bytes from socket.", sock); |
b1f8e4f8 | 1165 | |
0f0c8159 JH |
1166 | /* get errorcode from one nibble */ |
1167 | kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F; | |
1168 | switch(kav_rc) | |
1169 | { | |
1170 | case 5: case 6: /* improper kavdaemon configuration */ | |
ad93c40f | 1171 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1172 | US"please reconfigure kavdaemon to NOT disinfect or remove infected files.", |
1173 | sock); | |
1174 | case 1: | |
ad93c40f | 1175 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1176 | US"reported 'scanning not completed' (code 1).", sock); |
1177 | case 7: | |
ad93c40f | 1178 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1179 | US"reported 'kavdaemon damaged' (code 7).", sock); |
1180 | } | |
b1f8e4f8 | 1181 | |
4c04137d | 1182 | /* code 8 is not handled, since it is ambiguous. It appears mostly on |
0f0c8159 | 1183 | bounces where part of a file has been cut off */ |
b1f8e4f8 | 1184 | |
0f0c8159 JH |
1185 | /* "virus found" return codes (2-4) */ |
1186 | if (kav_rc > 1 && kav_rc < 5) | |
b1f8e4f8 | 1187 | { |
0f0c8159 | 1188 | int report_flag = 0; |
599dcb77 | 1189 | |
0f0c8159 JH |
1190 | /* setup default virus name */ |
1191 | malware_name = US"unknown"; | |
b1f8e4f8 | 1192 | |
0f0c8159 | 1193 | report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ]; |
b1f8e4f8 | 1194 | |
0f0c8159 JH |
1195 | /* read the report, if available */ |
1196 | if (report_flag == 1) | |
1197 | { | |
1198 | /* read report size */ | |
1199 | if (!recv_len(sock, &kav_reportlen, 4, tmo)) | |
ad93c40f | 1200 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 | 1201 | US"cannot read report size", sock); |
b1f8e4f8 | 1202 | |
0f0c8159 JH |
1203 | /* it's possible that avp returns av_buffer[1] == 1 but the |
1204 | reportsize is 0 (!?) */ | |
1205 | if (kav_reportlen > 0) | |
4e71661f | 1206 | { |
0f0c8159 | 1207 | /* set up match regex, depends on retcode */ |
476be7e2 JH |
1208 | if (kav_rc == 3) |
1209 | { | |
1210 | if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr); | |
1211 | kav_re = kav_re_sus; | |
1212 | } | |
1213 | else | |
1214 | { | |
1215 | if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr); | |
1216 | kav_re = kav_re_inf; | |
1217 | } | |
0f0c8159 | 1218 | |
6e92b3ae JH |
1219 | /* read report, linewise. Using size from stream to read amount of data |
1220 | from same stream is safe enough. */ | |
1221 | /* coverity[tainted_data] */ | |
0f0c8159 | 1222 | while (kav_reportlen > 0) |
4e71661f | 1223 | { |
0f0c8159 JH |
1224 | if ((bread = recv_line(sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0) |
1225 | break; | |
1226 | kav_reportlen -= bread+1; | |
1227 | ||
1228 | /* try matcher on the line, grab substring */ | |
1229 | if ((malware_name = m_pcre_exec(kav_re, tmpbuf))) | |
1230 | break; | |
b1f8e4f8 JH |
1231 | } |
1232 | } | |
1233 | } | |
0f0c8159 JH |
1234 | } |
1235 | else /* no virus found */ | |
1236 | malware_name = NULL; | |
599dcb77 | 1237 | |
0f0c8159 | 1238 | break; |
599dcb77 | 1239 | } |
c11d665d | 1240 | #endif |
8544e77a | 1241 | |
c11d665d | 1242 | #ifndef DISABLE_MAL_CMDLINE |
b1f8e4f8 JH |
1243 | case M_CMDL: /* "cmdline" scanner type ---------------------------------- */ |
1244 | { | |
0f0c8159 JH |
1245 | const uschar *cmdline_scanner = scanner_options; |
1246 | const pcre *cmdline_trigger_re; | |
1247 | const pcre *cmdline_regex_re; | |
1248 | uschar * file_name; | |
1249 | uschar * commandline; | |
1250 | void (*eximsigchld)(int); | |
1251 | void (*eximsigpipe)(int); | |
1252 | FILE *scanner_out = NULL; | |
1253 | int scanner_fd; | |
1254 | FILE *scanner_record = NULL; | |
1255 | uschar linebuffer[32767]; | |
1256 | int rcnt; | |
1257 | int trigger = 0; | |
1258 | uschar *p; | |
1259 | ||
1260 | if (!cmdline_scanner) | |
ad93c40f | 1261 | return m_panic_defer(scanent, NULL, errstr); |
b1f8e4f8 | 1262 | |
0f0c8159 JH |
1263 | /* find scanner output trigger */ |
1264 | cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1265 | "missing trigger specification", &errstr); | |
1266 | if (!cmdline_trigger_re) | |
ad93c40f | 1267 | return m_panic_defer(scanent, NULL, errstr); |
b1f8e4f8 | 1268 | |
0f0c8159 JH |
1269 | /* find scanner name regex */ |
1270 | cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1271 | "missing virus name regex specification", &errstr); | |
1272 | if (!cmdline_regex_re) | |
ad93c40f | 1273 | return m_panic_defer(scanent, NULL, errstr); |
b1f8e4f8 | 1274 | |
0f0c8159 JH |
1275 | /* prepare scanner call; despite the naming, file_name holds a directory |
1276 | name which is documented as the value given to %s. */ | |
b1f8e4f8 | 1277 | |
0f0c8159 JH |
1278 | file_name = string_copy(eml_filename); |
1279 | p = Ustrrchr(file_name, '/'); | |
1280 | if (p) | |
1281 | *p = '\0'; | |
1282 | commandline = string_sprintf(CS cmdline_scanner, file_name); | |
b1f8e4f8 | 1283 | |
0f0c8159 JH |
1284 | /* redirect STDERR too */ |
1285 | commandline = string_sprintf("%s 2>&1", commandline); | |
b1f8e4f8 | 1286 | |
e1d04f48 | 1287 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n", |
0f0c8159 | 1288 | scanner_name, commandline); |
b1f8e4f8 | 1289 | |
0f0c8159 JH |
1290 | /* store exims signal handlers */ |
1291 | eximsigchld = signal(SIGCHLD,SIG_DFL); | |
1292 | eximsigpipe = signal(SIGPIPE,SIG_DFL); | |
b1f8e4f8 | 1293 | |
0f0c8159 JH |
1294 | if (!(scanner_out = popen(CS commandline,"r"))) |
1295 | { | |
1296 | int err = errno; | |
1297 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
ad93c40f | 1298 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
1299 | string_sprintf("call (%s) failed: %s.", commandline, strerror(err))); |
1300 | } | |
1301 | scanner_fd = fileno(scanner_out); | |
94a18f28 | 1302 | |
040721f2 | 1303 | file_name = string_sprintf("%s/%s_scanner_output", eml_dir, message_id); |
b1f8e4f8 | 1304 | |
0f0c8159 JH |
1305 | if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE))) |
1306 | { | |
1307 | int err = errno; | |
1308 | (void) pclose(scanner_out); | |
1309 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
ad93c40f | 1310 | return m_panic_defer(scanent, NULL, string_sprintf( |
0f0c8159 JH |
1311 | "opening scanner output file (%s) failed: %s.", |
1312 | file_name, strerror(err))); | |
1313 | } | |
8e669ac1 | 1314 | |
0f0c8159 JH |
1315 | /* look for trigger while recording output */ |
1316 | while ((rcnt = recv_line(scanner_fd, linebuffer, | |
1317 | sizeof(linebuffer), tmo))) | |
1318 | { | |
1319 | if (rcnt < 0) | |
93a6fce2 JH |
1320 | { |
1321 | int err = errno; | |
0f0c8159 JH |
1322 | if (rcnt == -1) |
1323 | break; | |
93a6fce2 JH |
1324 | (void) pclose(scanner_out); |
1325 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
ad93c40f | 1326 | return m_panic_defer(scanent, NULL, string_sprintf( |
93a6fce2 JH |
1327 | "unable to read from scanner (%s): %s", |
1328 | commandline, strerror(err))); | |
1329 | } | |
4e71661f | 1330 | |
0f0c8159 JH |
1331 | if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record)) |
1332 | { | |
1333 | /* short write */ | |
1334 | (void) pclose(scanner_out); | |
1335 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
ad93c40f | 1336 | return m_panic_defer(scanent, NULL, string_sprintf( |
0f0c8159 | 1337 | "short write on scanner output file (%s).", file_name)); |
4e71661f | 1338 | } |
0f0c8159 JH |
1339 | putc('\n', scanner_record); |
1340 | /* try trigger match */ | |
1341 | if ( !trigger | |
1342 | && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1) | |
1343 | ) | |
1344 | trigger = 1; | |
1345 | } | |
8e669ac1 | 1346 | |
0f0c8159 JH |
1347 | (void)fclose(scanner_record); |
1348 | sep = pclose(scanner_out); | |
1349 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1350 | if (sep != 0) | |
ad93c40f | 1351 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
1352 | sep == -1 |
1353 | ? string_sprintf("running scanner failed: %s", strerror(sep)) | |
1354 | : string_sprintf("scanner returned error code: %d", sep)); | |
b1f8e4f8 | 1355 | |
0f0c8159 JH |
1356 | if (trigger) |
1357 | { | |
1358 | uschar * s; | |
1359 | /* setup default virus name */ | |
1360 | malware_name = US"unknown"; | |
b1f8e4f8 | 1361 | |
0f0c8159 JH |
1362 | /* re-open the scanner output file, look for name match */ |
1363 | scanner_record = fopen(CS file_name, "rb"); | |
1364 | while (fgets(CS linebuffer, sizeof(linebuffer), scanner_record)) | |
1365 | { | |
1366 | /* try match */ | |
1367 | if ((s = m_pcre_exec(cmdline_regex_re, linebuffer))) | |
1368 | malware_name = s; | |
4e71661f | 1369 | } |
0f0c8159 JH |
1370 | (void)fclose(scanner_record); |
1371 | } | |
1372 | else /* no virus found */ | |
1373 | malware_name = NULL; | |
1374 | break; | |
b1f8e4f8 | 1375 | } /* cmdline */ |
c11d665d | 1376 | #endif |
599dcb77 | 1377 | |
c11d665d | 1378 | #ifndef DISABLE_MAL_SOPHIE |
b1f8e4f8 JH |
1379 | case M_SOPHIE: /* "sophie" scanner type --------------------------------- */ |
1380 | { | |
0f0c8159 JH |
1381 | int bread = 0; |
1382 | uschar *p; | |
1383 | uschar * file_name; | |
1384 | uschar av_buffer[1024]; | |
b1f8e4f8 | 1385 | |
0f0c8159 JH |
1386 | /* pass the scan directory to sophie */ |
1387 | file_name = string_copy(eml_filename); | |
1388 | if ((p = Ustrrchr(file_name, '/'))) | |
1389 | *p = '\0'; | |
b1f8e4f8 | 1390 | |
e1d04f48 | 1391 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n", |
0f0c8159 | 1392 | scanner_name, scanner_options); |
b1f8e4f8 | 1393 | |
0f0c8159 JH |
1394 | if ( write(sock, file_name, Ustrlen(file_name)) < 0 |
1395 | || write(sock, "\n", 1) != 1 | |
1396 | ) | |
ad93c40f | 1397 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1398 | string_sprintf("unable to write to UNIX socket (%s)", scanner_options), |
1399 | sock); | |
b1f8e4f8 | 1400 | |
0f0c8159 JH |
1401 | /* wait for result */ |
1402 | memset(av_buffer, 0, sizeof(av_buffer)); | |
1403 | if ((bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL))) <= 0) | |
ad93c40f | 1404 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1405 | string_sprintf("unable to read from UNIX socket (%s)", scanner_options), |
1406 | sock); | |
1407 | ||
1408 | /* infected ? */ | |
1409 | if (av_buffer[0] == '1') { | |
1410 | uschar * s = Ustrchr(av_buffer, '\n'); | |
1411 | if (s) | |
1412 | *s = '\0'; | |
1413 | malware_name = string_copy(&av_buffer[2]); | |
1414 | } | |
1415 | else if (!strncmp(CS av_buffer, "-1", 2)) | |
ad93c40f | 1416 | return m_panic_defer_3(scanent, CUS callout_address, |
0ea02355 | 1417 | US"scanner reported error", sock); |
0f0c8159 JH |
1418 | else /* all ok, no virus */ |
1419 | malware_name = NULL; | |
599dcb77 | 1420 | |
0f0c8159 | 1421 | break; |
8544e77a | 1422 | } |
c11d665d | 1423 | #endif |
8e669ac1 | 1424 | |
c11d665d | 1425 | #ifndef DISABLE_MAL_CLAM |
b1f8e4f8 JH |
1426 | case M_CLAMD: /* "clamd" scanner type ----------------------------------- */ |
1427 | { | |
0f0c8159 JH |
1428 | /* This code was originally contributed by David Saez */ |
1429 | /* There are three scanning methods available to us: | |
1430 | * (1) Use the SCAN command, pointing to a file in the filesystem | |
1431 | * (2) Use the STREAM command, send the data on a separate port | |
1432 | * (3) Use the zINSTREAM command, send the data inline | |
1433 | * The zINSTREAM command was introduced with ClamAV 0.95, which marked | |
1434 | * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095 | |
1435 | * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that | |
e5ba8aa7 | 1436 | * the TCP-connected daemon is actually local; otherwise we use zINSTREAM |
0f0c8159 JH |
1437 | * See Exim bug 926 for details. */ |
1438 | ||
80591636 | 1439 | uschar *p, *vname, *result_tag; |
0f0c8159 | 1440 | int bread=0; |
0f0c8159 JH |
1441 | uschar av_buffer[1024]; |
1442 | uschar *hostname = US""; | |
1443 | host_item connhost; | |
1444 | uschar *clamav_fbuf; | |
1445 | int clam_fd, result; | |
1446 | off_t fsize; | |
1447 | unsigned int fsize_uint; | |
1448 | BOOL use_scan_command = FALSE; | |
8a512ed5 | 1449 | clamd_address * cv[MAX_CLAMD_SERVERS]; |
0f0c8159 | 1450 | int num_servers = 0; |
0f0c8159 | 1451 | uint32_t send_size, send_final_zeroblock; |
4a5cbaff | 1452 | blob cmd_str; |
0f0c8159 | 1453 | |
8a512ed5 JH |
1454 | /*XXX if unixdomain socket, only one server supported. Needs fixing; |
1455 | there's no reason we should not mix local and remote servers */ | |
1456 | ||
0f0c8159 | 1457 | if (*scanner_options == '/') |
8a512ed5 JH |
1458 | { |
1459 | clamd_address * cd; | |
1460 | const uschar * sublist; | |
1461 | int subsep = ' '; | |
1462 | ||
0f0c8159 JH |
1463 | /* Local file; so we def want to use_scan_command and don't want to try |
1464 | * passing IP/port combinations */ | |
1465 | use_scan_command = TRUE; | |
8a512ed5 JH |
1466 | cd = (clamd_address *) store_get(sizeof(clamd_address)); |
1467 | ||
1468 | /* extract socket-path part */ | |
1469 | sublist = scanner_options; | |
1470 | cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0); | |
1471 | ||
1472 | /* parse options */ | |
1473 | if (clamd_option(cd, sublist, &subsep) != OK) | |
ad93c40f | 1474 | return m_panic_defer(scanent, NULL, |
8a512ed5 JH |
1475 | string_sprintf("bad option '%s'", scanner_options)); |
1476 | cv[0] = cd; | |
1477 | } | |
0f0c8159 JH |
1478 | else |
1479 | { | |
0f0c8159 JH |
1480 | /* Go through the rest of the list of host/port and construct an array |
1481 | * of servers to try. The first one is the bit we just passed from | |
1482 | * scanner_options so process that first and then scan the remainder of | |
1483 | * the address buffer */ | |
1484 | do | |
4e71661f | 1485 | { |
8a512ed5 JH |
1486 | clamd_address * cd; |
1487 | const uschar * sublist; | |
1488 | int subsep = ' '; | |
1489 | uschar * s; | |
b1f8e4f8 | 1490 | |
0f0c8159 JH |
1491 | /* The 'local' option means use the SCAN command over the network |
1492 | * socket (ie common file storage in use) */ | |
8a512ed5 JH |
1493 | /*XXX we could accept this also as a local option? */ |
1494 | if (strcmpic(scanner_options, US"local") == 0) | |
0f0c8159 JH |
1495 | { |
1496 | use_scan_command = TRUE; | |
1497 | continue; | |
1498 | } | |
b1f8e4f8 | 1499 | |
8a512ed5 | 1500 | cd = (clamd_address *) store_get(sizeof(clamd_address)); |
b1f8e4f8 | 1501 | |
0f0c8159 | 1502 | /* extract host and port part */ |
8a512ed5 JH |
1503 | sublist = scanner_options; |
1504 | if (!(cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0))) | |
1505 | { | |
ad93c40f | 1506 | (void) m_panic_defer(scanent, NULL, |
8a512ed5 JH |
1507 | string_sprintf("missing address: '%s'", scanner_options)); |
1508 | continue; | |
1509 | } | |
1510 | if (!(s = string_nextinlist(&sublist, &subsep, NULL, 0))) | |
0f0c8159 | 1511 | { |
ad93c40f | 1512 | (void) m_panic_defer(scanent, NULL, |
8a512ed5 JH |
1513 | string_sprintf("missing port: '%s'", scanner_options)); |
1514 | continue; | |
1515 | } | |
93a6fce2 | 1516 | cd->tcp_port = atoi(CS s); |
8a512ed5 JH |
1517 | |
1518 | /* parse options */ | |
1519 | /*XXX should these options be common over scanner types? */ | |
1520 | if (clamd_option(cd, sublist, &subsep) != OK) | |
ad93c40f | 1521 | return m_panic_defer(scanent, NULL, |
8a512ed5 | 1522 | string_sprintf("bad option '%s'", scanner_options)); |
b1f8e4f8 | 1523 | |
8a512ed5 | 1524 | cv[num_servers++] = cd; |
0f0c8159 JH |
1525 | if (num_servers >= MAX_CLAMD_SERVERS) |
1526 | { | |
ad93c40f | 1527 | (void) m_panic_defer(scanent, NULL, |
0f0c8159 JH |
1528 | US"More than " MAX_CLAMD_SERVERS_S " clamd servers " |
1529 | "specified; only using the first " MAX_CLAMD_SERVERS_S ); | |
1530 | break; | |
1531 | } | |
8a512ed5 JH |
1532 | } while ((scanner_options = string_nextinlist(&av_scanner_work, &sep, |
1533 | NULL, 0))); | |
8e669ac1 | 1534 | |
0f0c8159 JH |
1535 | /* check if we have at least one server */ |
1536 | if (!num_servers) | |
ad93c40f | 1537 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
1538 | US"no useable server addresses in malware configuration option."); |
1539 | } | |
b1f8e4f8 | 1540 | |
0f0c8159 JH |
1541 | /* See the discussion of response formats below to see why we really |
1542 | don't like colons in filenames when passing filenames to ClamAV. */ | |
1543 | if (use_scan_command && Ustrchr(eml_filename, ':')) | |
ad93c40f | 1544 | return m_panic_defer(scanent, NULL, |
0f0c8159 JH |
1545 | string_sprintf("local/SCAN mode incompatible with" \ |
1546 | " : in path to email filename [%s]", eml_filename)); | |
b1f8e4f8 | 1547 | |
4a5cbaff JH |
1548 | /* Set up the very first data we will be sending */ |
1549 | if (!use_scan_command) | |
4a5cbaff | 1550 | { cmd_str.data = US"zINSTREAM"; cmd_str.len = 10; } |
4a5cbaff JH |
1551 | else |
1552 | { | |
1553 | cmd_str.data = string_sprintf("SCAN %s\n", eml_filename); | |
1554 | cmd_str.len = Ustrlen(cmd_str.data); | |
1555 | } | |
1556 | ||
0f0c8159 JH |
1557 | /* We have some network servers specified */ |
1558 | if (num_servers) | |
1559 | { | |
1560 | /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd | |
1561 | * only supports AF_INET, but we should probably be looking to the | |
1562 | * future and rewriting this to be protocol-independent anyway. */ | |
b1f8e4f8 | 1563 | |
0f0c8159 JH |
1564 | while (num_servers > 0) |
1565 | { | |
4a5cbaff | 1566 | int i = random_number(num_servers); |
8a512ed5 | 1567 | clamd_address * cd = cv[i]; |
b1f8e4f8 | 1568 | |
e1d04f48 | 1569 | DEBUG(D_acl) debug_printf_indent("trying server name %s, port %u\n", |
8a512ed5 | 1570 | cd->hostspec, cd->tcp_port); |
0f0c8159 JH |
1571 | |
1572 | /* Lookup the host. This is to ensure that we connect to the same IP | |
1573 | * on both connections (as one host could resolve to multiple ips) */ | |
8a512ed5 | 1574 | for (;;) |
0f0c8159 | 1575 | { |
4a5cbaff JH |
1576 | if ((sock = m_tcpsocket(cd->hostspec, cd->tcp_port, |
1577 | &connhost, &errstr, &cmd_str)) >= 0) | |
8a512ed5 JH |
1578 | { |
1579 | /* Connection successfully established with a server */ | |
1580 | hostname = cd->hostspec; | |
4a5cbaff | 1581 | cmd_str.len = 0; |
8a512ed5 JH |
1582 | break; |
1583 | } | |
1584 | if (cd->retry <= 0) break; | |
1585 | while (cd->retry > 0) cd->retry = sleep(cd->retry); | |
4e71661f | 1586 | } |
8a512ed5 JH |
1587 | if (sock >= 0) |
1588 | break; | |
b1f8e4f8 | 1589 | |
ad93c40f | 1590 | (void) m_panic_defer(scanent, CUS callout_address, errstr); |
0f0c8159 JH |
1591 | |
1592 | /* Remove the server from the list. XXX We should free the memory */ | |
1593 | num_servers--; | |
8a512ed5 JH |
1594 | for (; i < num_servers; i++) |
1595 | cv[i] = cv[i+1]; | |
4e71661f | 1596 | } |
8e669ac1 | 1597 | |
0f0c8159 | 1598 | if (num_servers == 0) |
ad93c40f | 1599 | return m_panic_defer(scanent, NULL, US"all servers failed"); |
0f0c8159 JH |
1600 | } |
1601 | else | |
8a512ed5 JH |
1602 | for (;;) |
1603 | { | |
1604 | if ((sock = ip_unixsocket(cv[0]->hostspec, &errstr)) >= 0) | |
1605 | { | |
1606 | hostname = cv[0]->hostspec; | |
1607 | break; | |
1608 | } | |
1609 | if (cv[0]->retry <= 0) | |
ad93c40f | 1610 | return m_panic_defer(scanent, CUS callout_address, errstr); |
8a512ed5 JH |
1611 | while (cv[0]->retry > 0) cv[0]->retry = sleep(cv[0]->retry); |
1612 | } | |
b1f8e4f8 | 1613 | |
0f0c8159 JH |
1614 | /* have socket in variable "sock"; command to use is semi-independent of |
1615 | * the socket protocol. We use SCAN if is local (either Unix/local | |
1616 | * domain socket, or explicitly told local) else we stream the data. | |
1617 | * How we stream the data depends upon how we were built. */ | |
1618 | ||
1619 | if (!use_scan_command) | |
1620 | { | |
0f0c8159 JH |
1621 | /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data> |
1622 | chunks, <n> a 4-byte number (network order), terminated by a zero-length | |
1623 | chunk. */ | |
b1f8e4f8 | 1624 | |
e1d04f48 | 1625 | DEBUG(D_acl) debug_printf_indent( |
0f0c8159 JH |
1626 | "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n", |
1627 | scanner_name); | |
b1f8e4f8 | 1628 | |
4a5cbaff JH |
1629 | /* Pass the string to ClamAV (10 = "zINSTREAM\0"), if not already sent */ |
1630 | if (cmd_str.len) | |
1631 | if (send(sock, cmd_str.data, cmd_str.len, 0) < 0) | |
ad93c40f | 1632 | return m_panic_defer_3(scanent, CUS hostname, |
4a5cbaff JH |
1633 | string_sprintf("unable to send zINSTREAM to socket (%s)", |
1634 | strerror(errno)), | |
1635 | sock); | |
b1f8e4f8 | 1636 | |
0f0c8159 JH |
1637 | /* calc file size */ |
1638 | if ((clam_fd = open(CS eml_filename, O_RDONLY)) < 0) | |
1639 | { | |
1640 | int err = errno; | |
ad93c40f | 1641 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1642 | string_sprintf("can't open spool file %s: %s", |
1643 | eml_filename, strerror(err)), | |
1644 | sock); | |
1645 | } | |
1646 | if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0) | |
1647 | { | |
d315eda1 JH |
1648 | int err; |
1649 | b_seek: err = errno; | |
e5ba8aa7 | 1650 | (void)close(clam_fd); |
ad93c40f | 1651 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1652 | string_sprintf("can't seek spool file %s: %s", |
1653 | eml_filename, strerror(err)), | |
1654 | sock); | |
1655 | } | |
1656 | fsize_uint = (unsigned int) fsize; | |
1657 | if ((off_t)fsize_uint != fsize) | |
1658 | { | |
e5ba8aa7 | 1659 | (void)close(clam_fd); |
ad93c40f | 1660 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1661 | string_sprintf("seeking spool file %s, size overflow", |
1662 | eml_filename), | |
1663 | sock); | |
1664 | } | |
d315eda1 JH |
1665 | if (lseek(clam_fd, 0, SEEK_SET) < 0) |
1666 | goto b_seek; | |
b1f8e4f8 | 1667 | |
40c90bca | 1668 | if (!(clamav_fbuf = US malloc(fsize_uint))) |
0f0c8159 | 1669 | { |
e5ba8aa7 | 1670 | (void)close(clam_fd); |
ad93c40f | 1671 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1672 | string_sprintf("unable to allocate memory %u for file (%s)", |
1673 | fsize_uint, eml_filename), | |
1674 | sock); | |
1675 | } | |
b1f8e4f8 | 1676 | |
0f0c8159 JH |
1677 | if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0) |
1678 | { | |
1679 | int err = errno; | |
e5ba8aa7 | 1680 | free(clamav_fbuf); (void)close(clam_fd); |
ad93c40f | 1681 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1682 | string_sprintf("can't read spool file %s: %s", |
1683 | eml_filename, strerror(err)), | |
1684 | sock); | |
1685 | } | |
1686 | (void)close(clam_fd); | |
b1f8e4f8 | 1687 | |
0f0c8159 | 1688 | /* send file body to socket */ |
0f0c8159 JH |
1689 | send_size = htonl(fsize_uint); |
1690 | send_final_zeroblock = 0; | |
1691 | if ((send(sock, &send_size, sizeof(send_size), 0) < 0) || | |
1692 | (send(sock, clamav_fbuf, fsize_uint, 0) < 0) || | |
1693 | (send(sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0)) | |
1694 | { | |
b1f8e4f8 | 1695 | free(clamav_fbuf); |
ad93c40f | 1696 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1697 | string_sprintf("unable to send file body to socket (%s)", hostname), |
1698 | sock); | |
4e71661f | 1699 | } |
b1f8e4f8 | 1700 | |
0f0c8159 | 1701 | free(clamav_fbuf); |
0f0c8159 JH |
1702 | } |
1703 | else | |
1704 | { /* use scan command */ | |
1705 | /* Send a SCAN command pointing to a filename; then in the then in the | |
1706 | * scan-method-neutral part, read the response back */ | |
1707 | ||
1708 | /* ================================================================= */ | |
1709 | ||
1710 | /* Prior to the reworking post-Exim-4.72, this scanned a directory, | |
1711 | which dates to when ClamAV needed us to break apart the email into the | |
1712 | MIME parts (eg, with the now deprecated demime condition coming first). | |
1713 | Some time back, ClamAV gained the ability to deconstruct the emails, so | |
1714 | doing this would actually have resulted in the mail attachments being | |
1715 | scanned twice, in the broken out files and from the original .eml. | |
1716 | Since ClamAV now handles emails (and has for quite some time) we can | |
1717 | just use the email file itself. */ | |
4a5cbaff | 1718 | /* Pass the string to ClamAV (7 = "SCAN \n" + \0), if not already sent */ |
0f0c8159 | 1719 | |
e1d04f48 | 1720 | DEBUG(D_acl) debug_printf_indent( |
0f0c8159 JH |
1721 | "Malware scan: issuing %s local-path scan [%s]\n", |
1722 | scanner_name, scanner_options); | |
b1f8e4f8 | 1723 | |
4a5cbaff JH |
1724 | if (cmd_str.len) |
1725 | if (send(sock, cmd_str.data, cmd_str.len, 0) < 0) | |
ad93c40f | 1726 | return m_panic_defer_3(scanent, CUS callout_address, |
4a5cbaff JH |
1727 | string_sprintf("unable to write to socket (%s)", strerror(errno)), |
1728 | sock); | |
b1f8e4f8 | 1729 | |
0f0c8159 JH |
1730 | /* Do not shut down the socket for writing; a user report noted that |
1731 | * clamd 0.70 does not react well to this. */ | |
1732 | } | |
1733 | /* Commands have been sent, no matter which scan method or connection | |
1734 | * type we're using; now just read the result, independent of method. */ | |
1735 | ||
1736 | /* Read the result */ | |
1737 | memset(av_buffer, 0, sizeof(av_buffer)); | |
1738 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); | |
1739 | (void)close(sock); | |
1740 | sock = -1; | |
1741 | ||
1742 | if (bread <= 0) | |
ad93c40f | 1743 | return m_panic_defer(scanent, CUS callout_address, |
0f0c8159 JH |
1744 | string_sprintf("unable to read from socket (%s)", |
1745 | errno == 0 ? "EOF" : strerror(errno))); | |
1746 | ||
1747 | if (bread == sizeof(av_buffer)) | |
ad93c40f | 1748 | return m_panic_defer(scanent, CUS callout_address, |
0ea02355 | 1749 | US"buffer too small"); |
0f0c8159 JH |
1750 | /* We're now assured of a NULL at the end of av_buffer */ |
1751 | ||
1752 | /* Check the result. ClamAV returns one of two result formats. | |
1753 | In the basic mode, the response is of the form: | |
1754 | infected: -> "<filename>: <virusname> FOUND" | |
1755 | not-infected: -> "<filename>: OK" | |
1756 | error: -> "<filename>: <errcode> ERROR | |
1757 | If the ExtendedDetectionInfo option has been turned on, then we get: | |
1758 | "<filename>: <virusname>(<virushash>:<virussize>) FOUND" | |
1759 | for the infected case. Compare: | |
1760 | /tmp/eicar.com: Eicar-Test-Signature FOUND | |
1761 | /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND | |
1762 | ||
1763 | In the streaming case, clamd uses the filename "stream" which you should | |
1764 | be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The | |
1765 | client app will replace "stream" with the original filename before returning | |
1766 | results to stdout, but the trace shows the data). | |
1767 | ||
1768 | We will assume that the pathname passed to clamd from Exim does not contain | |
1769 | a colon. We will have whined loudly above if the eml_filename does (and we're | |
1770 | passing a filename to clamd). */ | |
1771 | ||
1772 | if (!(*av_buffer)) | |
ad93c40f | 1773 | return m_panic_defer(scanent, CUS callout_address, |
0ea02355 | 1774 | US"ClamAV returned null"); |
0f0c8159 JH |
1775 | |
1776 | /* strip newline at the end (won't be present for zINSTREAM) | |
1777 | (also any trailing whitespace, which shouldn't exist, but we depend upon | |
1778 | this below, so double-check) */ | |
1779 | p = av_buffer + Ustrlen(av_buffer) - 1; | |
1780 | if (*p == '\n') *p = '\0'; | |
1781 | ||
e1d04f48 | 1782 | DEBUG(D_acl) debug_printf_indent("Malware response: %s\n", av_buffer); |
0f0c8159 JH |
1783 | |
1784 | while (isspace(*--p) && (p > av_buffer)) | |
1785 | *p = '\0'; | |
1786 | if (*p) ++p; | |
0f0c8159 JH |
1787 | |
1788 | /* colon in returned output? */ | |
80591636 | 1789 | if(!(p = Ustrchr(av_buffer,':'))) |
ad93c40f | 1790 | return m_panic_defer(scanent, CUS callout_address, string_sprintf( |
0f0c8159 JH |
1791 | "ClamAV returned malformed result (missing colon): %s", |
1792 | av_buffer)); | |
1793 | ||
1794 | /* strip filename */ | |
1795 | while (*p && isspace(*++p)) /**/; | |
1796 | vname = p; | |
1797 | ||
1798 | /* It would be bad to encounter a virus with "FOUND" in part of the name, | |
1799 | but we should at least be resistant to it. */ | |
1800 | p = Ustrrchr(vname, ' '); | |
1801 | result_tag = p ? p+1 : vname; | |
1802 | ||
1803 | if (Ustrcmp(result_tag, "FOUND") == 0) | |
1804 | { | |
1805 | /* p should still be the whitespace before the result_tag */ | |
1806 | while (isspace(*p)) --p; | |
1807 | *++p = '\0'; | |
1808 | /* Strip off the extended information too, which will be in parens | |
1809 | after the virus name, with no intervening whitespace. */ | |
1810 | if (*--p == ')') | |
4e71661f | 1811 | { |
0f0c8159 JH |
1812 | /* "(hash:size)", so previous '(' will do; if not found, we have |
1813 | a curious virus name, but not an error. */ | |
1814 | p = Ustrrchr(vname, '('); | |
1815 | if (p) | |
1816 | *p = '\0'; | |
4e71661f | 1817 | } |
0f0c8159 | 1818 | malware_name = string_copy(vname); |
e1d04f48 | 1819 | DEBUG(D_acl) debug_printf_indent("Malware found, name \"%s\"\n", malware_name); |
b1f8e4f8 | 1820 | |
0f0c8159 JH |
1821 | } |
1822 | else if (Ustrcmp(result_tag, "ERROR") == 0) | |
ad93c40f | 1823 | return m_panic_defer(scanent, CUS callout_address, |
0f0c8159 | 1824 | string_sprintf("ClamAV returned: %s", av_buffer)); |
b1f8e4f8 | 1825 | |
0f0c8159 JH |
1826 | else if (Ustrcmp(result_tag, "OK") == 0) |
1827 | { | |
1828 | /* Everything should be OK */ | |
1829 | malware_name = NULL; | |
e1d04f48 | 1830 | DEBUG(D_acl) debug_printf_indent("Malware not found\n"); |
b1f8e4f8 | 1831 | |
0f0c8159 JH |
1832 | } |
1833 | else | |
ad93c40f | 1834 | return m_panic_defer(scanent, CUS callout_address, |
0f0c8159 JH |
1835 | string_sprintf("unparseable response from ClamAV: {%s}", av_buffer)); |
1836 | ||
1837 | break; | |
b1f8e4f8 | 1838 | } /* clamd */ |
c11d665d | 1839 | #endif |
b1f8e4f8 | 1840 | |
c11d665d | 1841 | #ifndef DISABLE_MAL_SOCK |
b1f8e4f8 | 1842 | case M_SOCK: /* "sock" scanner type ------------------------------------- */ |
0f0c8159 JH |
1843 | /* This code was derived by Martin Poole from the clamd code contributed |
1844 | by David Saez and the cmdline code | |
1845 | */ | |
b1f8e4f8 | 1846 | { |
0f0c8159 JH |
1847 | int bread; |
1848 | uschar * commandline; | |
1849 | uschar av_buffer[1024]; | |
1850 | uschar * linebuffer; | |
1851 | uschar * sockline_scanner; | |
1852 | uschar sockline_scanner_default[] = "%s\n"; | |
1853 | const pcre *sockline_trig_re; | |
1854 | const pcre *sockline_name_re; | |
1855 | ||
1856 | /* find scanner command line */ | |
ac4d558b JH |
1857 | if ( (sockline_scanner = string_nextinlist(&av_scanner_work, &sep, |
1858 | NULL, 0)) | |
1859 | && *sockline_scanner | |
1860 | ) | |
0f0c8159 JH |
1861 | { /* check for no expansions apart from one %s */ |
1862 | uschar * s = Ustrchr(sockline_scanner, '%'); | |
1863 | if (s++) | |
1864 | if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%')) | |
ad93c40f | 1865 | return m_panic_defer_3(scanent, NULL, |
0f0c8159 JH |
1866 | US"unsafe sock scanner call spec", sock); |
1867 | } | |
1868 | else | |
1869 | sockline_scanner = sockline_scanner_default; | |
ac4d558b JH |
1870 | DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "cmdline: ", |
1871 | string_printing(sockline_scanner)); | |
b1f8e4f8 | 1872 | |
0f0c8159 JH |
1873 | /* find scanner output trigger */ |
1874 | sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1875 | "missing trigger specification", &errstr); | |
1876 | if (!sockline_trig_re) | |
ad93c40f | 1877 | return m_panic_defer_3(scanent, NULL, errstr, sock); |
b1f8e4f8 | 1878 | |
0f0c8159 JH |
1879 | /* find virus name regex */ |
1880 | sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1881 | "missing virus name regex specification", &errstr); | |
1882 | if (!sockline_name_re) | |
ad93c40f | 1883 | return m_panic_defer_3(scanent, NULL, errstr, sock); |
b1f8e4f8 | 1884 | |
0f0c8159 | 1885 | /* prepare scanner call - security depends on expansions check above */ |
040721f2 | 1886 | commandline = string_sprintf( CS sockline_scanner, CS eml_filename); |
ac4d558b JH |
1887 | DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "expanded: ", |
1888 | string_printing(commandline)); | |
b1f8e4f8 | 1889 | |
0f0c8159 JH |
1890 | /* Pass the command string to the socket */ |
1891 | if (m_sock_send(sock, commandline, Ustrlen(commandline), &errstr) < 0) | |
ad93c40f | 1892 | return m_panic_defer(scanent, CUS callout_address, errstr); |
b1f8e4f8 | 1893 | |
0f0c8159 JH |
1894 | /* Read the result */ |
1895 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); | |
b1f8e4f8 | 1896 | |
0f0c8159 | 1897 | if (bread <= 0) |
ad93c40f | 1898 | return m_panic_defer_3(scanent, CUS callout_address, |
0f0c8159 JH |
1899 | string_sprintf("unable to read from socket (%s)", strerror(errno)), |
1900 | sock); | |
b1f8e4f8 | 1901 | |
0f0c8159 | 1902 | if (bread == sizeof(av_buffer)) |
ad93c40f | 1903 | return m_panic_defer_3(scanent, CUS callout_address, |
0ea02355 | 1904 | US"buffer too small", sock); |
0f0c8159 JH |
1905 | av_buffer[bread] = '\0'; |
1906 | linebuffer = string_copy(av_buffer); | |
ac4d558b JH |
1907 | DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "answer: ", |
1908 | string_printing(linebuffer)); | |
b1f8e4f8 | 1909 | |
0f0c8159 JH |
1910 | /* try trigger match */ |
1911 | if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1)) | |
1912 | { | |
1913 | if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer))) | |
1914 | malware_name = US "unknown"; | |
ac4d558b JH |
1915 | DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "name: ", |
1916 | string_printing(malware_name)); | |
b1f8e4f8 | 1917 | } |
0f0c8159 JH |
1918 | else /* no virus found */ |
1919 | malware_name = NULL; | |
1920 | break; | |
8523533c | 1921 | } |
c11d665d | 1922 | #endif |
8e669ac1 | 1923 | |
c11d665d | 1924 | #ifndef DISABLE_MAL_MKS |
b1f8e4f8 JH |
1925 | case M_MKSD: /* "mksd" scanner type ------------------------------------- */ |
1926 | { | |
0f0c8159 JH |
1927 | char *mksd_options_end; |
1928 | int mksd_maxproc = 1; /* default, if no option supplied */ | |
1929 | int retval; | |
b1f8e4f8 | 1930 | |
0f0c8159 JH |
1931 | if (scanner_options) |
1932 | { | |
1933 | mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10); | |
1934 | if ( *scanner_options == '\0' | |
1935 | || *mksd_options_end != '\0' | |
1936 | || mksd_maxproc < 1 | |
1937 | || mksd_maxproc > 32 | |
1938 | ) | |
ad93c40f | 1939 | return m_panic_defer(scanent, CUS callout_address, |
0f0c8159 JH |
1940 | string_sprintf("invalid option '%s'", scanner_options)); |
1941 | } | |
8e669ac1 | 1942 | |
3e60dd41 | 1943 | if((sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0) |
ad93c40f | 1944 | return m_panic_defer(scanent, CUS callout_address, errstr); |
8e669ac1 | 1945 | |
0f0c8159 | 1946 | malware_name = NULL; |
94a18f28 | 1947 | |
e1d04f48 | 1948 | DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan\n", scanner_name); |
94a18f28 | 1949 | |
0f0c8159 JH |
1950 | if ((retval = mksd_scan_packed(scanent, sock, eml_filename, tmo)) != OK) |
1951 | { | |
1952 | close (sock); | |
1953 | return retval; | |
1954 | } | |
1955 | break; | |
8523533c | 1956 | } |
c11d665d | 1957 | #endif |
0f0c8159 | 1958 | |
c11d665d | 1959 | #ifndef DISABLE_MAL_AVAST |
b6fbf22d JH |
1960 | case M_AVAST: /* "avast" scanner type ----------------------------------- */ |
1961 | { | |
b6fbf22d JH |
1962 | uschar buf[1024]; |
1963 | uschar * scanrequest; | |
b6fbf22d | 1964 | enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage; |
0f0c8159 | 1965 | int nread; |
ad93c40f | 1966 | uschar * error_message = NULL; |
4fe93c4b HSHR |
1967 | BOOL more_data = FALSE; |
1968 | BOOL strict = TRUE; | |
b6fbf22d JH |
1969 | |
1970 | /* According to Martin Tuma @avast the protocol uses "escaped | |
1971 | whitespace", that is, every embedded whitespace is backslash | |
1972 | escaped, as well as backslash is protected by backslash. | |
1973 | The returned lines contain the name of the scanned file, a tab | |
1974 | and the [ ] marker. | |
1975 | [+] - not infected | |
1976 | [L] - infected | |
1977 | [E] - some error occured | |
71bb51e0 HSHR |
1978 | Such marker follows the first non-escaped TAB. For more information |
1979 | see avast-protocol(5) | |
ad93c40f HSHR |
1980 | |
1981 | We observed two cases: | |
1982 | -> SCAN /file | |
1983 | <- /file [E]0.0 Error 13 Permission denied | |
1984 | <- 451 SCAN Engine error 13 permission denied | |
1985 | ||
1986 | -> SCAN /file | |
1987 | <- /file… [E]3.0 Error 41120 The file is a decompression bomb | |
1988 | <- /file… [+]2.0 | |
1989 | <- /file… [+]2.0 0 Eicar Test Virus!!! | |
1990 | <- 200 SCAN OK | |
1991 | ||
1992 | If the scanner returns 4xx, DEFER is a good decision, combined | |
1993 | with a panic log entry, to get the admin's attention. | |
1994 | ||
1995 | If the scanner returns 200, we reject it as malware, if found any, | |
1996 | or, in case of an error, we set the malware message to the error | |
1997 | string. | |
1998 | ||
1999 | Some of the >= 42000 errors are message related - usually some | |
2000 | broken archives etc, but some of them are e.g. license related. | |
2001 | Once the license expires the engine starts returning errors for | |
2002 | every scanning attempt. I¹ have the full list of the error codes | |
2003 | but it is not a public API and is subject to change. It is hard | |
2004 | for me to say what you should do in case of an engine error. You | |
2005 | can have a “Treat * unscanned file as infection” policy or “Treat | |
2006 | unscanned file as clean” policy. ¹) Jakub Bednar | |
2007 | ||
2008 | */ | |
2009 | ||
476be7e2 JH |
2010 | if ( ( !ava_re_clean |
2011 | && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr))) | |
2012 | || ( !ava_re_virus | |
2013 | && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr))) | |
ad93c40f HSHR |
2014 | || ( !ava_re_error |
2015 | && !(ava_re_error = m_pcre_compile(ava_re_error_str, &errstr))) | |
b6fbf22d | 2016 | ) |
ad93c40f | 2017 | return malware_panic_defer(errstr); |
b6fbf22d JH |
2018 | |
2019 | /* wait for result */ | |
0f0c8159 JH |
2020 | for (avast_stage = AVA_HELO; |
2021 | (nread = recv_line(sock, buf, sizeof(buf), tmo)) > 0; | |
2022 | ) | |
b6fbf22d JH |
2023 | { |
2024 | int slen = Ustrlen(buf); | |
94431adb | 2025 | if (slen >= 1) |
b6fbf22d | 2026 | { |
71bb51e0 HSHR |
2027 | |
2028 | /* Multi line responses are bracketed between 210 … and nnn … */ | |
2029 | if (Ustrncmp(buf, "210", 3) == 0) | |
2030 | { | |
2031 | more_data = 1; | |
2032 | continue; | |
2033 | } | |
2034 | else if (more_data && isdigit(buf[0])) more_data = 0; | |
2035 | ||
b6fbf22d JH |
2036 | switch (avast_stage) |
2037 | { | |
2038 | case AVA_HELO: | |
71bb51e0 | 2039 | if (more_data) continue; |
b6fbf22d JH |
2040 | if (Ustrncmp(buf, "220", 3) != 0) |
2041 | goto endloop; /* require a 220 */ | |
2042 | goto sendreq; | |
2043 | ||
2044 | case AVA_OPT: | |
71bb51e0 | 2045 | if (more_data) continue; |
b6fbf22d JH |
2046 | if (Ustrncmp(buf, "200", 3) != 0) |
2047 | goto endloop; /* require a 200 */ | |
2048 | ||
2049 | sendreq: | |
2050 | { | |
2051 | int len; | |
2052 | /* Check for another option to send. Newline-terminate it. */ | |
2053 | if ((scanrequest = string_nextinlist(&av_scanner_work, &sep, | |
2054 | NULL, 0))) | |
2055 | { | |
eb445b04 HSHR |
2056 | if (Ustrcmp(scanrequest, "pass_unscanned") == 0) |
2057 | { | |
2058 | DEBUG(D_acl) debug_printf_indent("pass unscanned files as clean\n"); | |
2059 | strict = FALSE; | |
2060 | goto sendreq; | |
2061 | } | |
b6fbf22d JH |
2062 | scanrequest = string_sprintf("%s\n", scanrequest); |
2063 | avast_stage = AVA_OPT; /* just sent option */ | |
71bb51e0 | 2064 | DEBUG(D_acl) debug_printf_indent("send to avast OPTION: %s", scanrequest); |
b6fbf22d JH |
2065 | } |
2066 | else | |
2067 | { | |
040721f2 | 2068 | scanrequest = string_sprintf("SCAN %s\n", eml_dir); |
b6fbf22d | 2069 | avast_stage = AVA_RSP; /* just sent command */ |
71bb51e0 | 2070 | DEBUG(D_acl) debug_printf_indent("send to avast REQUEST: SCAN %s\n", eml_dir); |
b6fbf22d JH |
2071 | } |
2072 | ||
2073 | /* send config-cmd or scan-request to socket */ | |
2074 | len = Ustrlen(scanrequest); | |
ad93c40f | 2075 | if (send(sock, scanrequest, len, 0) == -1) |
b6fbf22d JH |
2076 | { |
2077 | scanrequest[len-1] = '\0'; | |
ad93c40f | 2078 | return m_panic_defer_3(scanent, CUS callout_address, string_sprintf( |
b6fbf22d JH |
2079 | "unable to send request '%s' to socket (%s): %s", |
2080 | scanrequest, scanner_options, strerror(errno)), sock); | |
2081 | } | |
2082 | break; | |
2083 | } | |
2084 | ||
2085 | case AVA_RSP: | |
71bb51e0 | 2086 | |
91e974f5 | 2087 | if (isdigit(buf[0])) /* We're done */ |
71bb51e0 | 2088 | goto endloop; |
71bb51e0 | 2089 | |
91e974f5 | 2090 | if (malware_name) /* Nothing else matters, just read on */ |
ad93c40f | 2091 | break; |
b6fbf22d | 2092 | |
91e974f5 | 2093 | if (pcre_exec(ava_re_clean, NULL, CS buf, slen, 0, 0, NULL, 0) == 0) |
b6fbf22d JH |
2094 | break; |
2095 | ||
4fe93c4b | 2096 | if ((malware_name = m_pcre_exec(ava_re_virus, buf))) |
ad93c40f HSHR |
2097 | { |
2098 | unescape(malware_name); | |
2099 | DEBUG(D_acl) | |
2100 | debug_printf_indent("unescaped malware name: '%s'\n", malware_name); | |
2101 | break; | |
2102 | } | |
2103 | ||
91e974f5 | 2104 | if (strict) /* treat scanner errors as malware */ |
ad93c40f | 2105 | { |
4fe93c4b | 2106 | if ((malware_name = m_pcre_exec(ava_re_error, buf))) |
91e974f5 HSHR |
2107 | { |
2108 | unescape(malware_name); | |
2109 | DEBUG(D_acl) | |
2110 | debug_printf_indent("unescaped error message: '%s'\n", malware_name); | |
2111 | break; | |
2112 | } | |
ad93c40f | 2113 | } |
91e974f5 | 2114 | else if (pcre_exec(ava_re_error, NULL, CS buf, slen, 0, 0, NULL, 0) == 0) |
eb445b04 HSHR |
2115 | { |
2116 | log_write(0, LOG_MAIN, "internal scanner error (ignored): %s", buf); | |
2117 | break; | |
2118 | } | |
2119 | ||
83d2a861 | 2120 | /* here also for any unexpected response from the scanner */ |
eb445b04 | 2121 | DEBUG(D_acl) debug_printf("avast response not handled: '%s'\n", buf); |
91e974f5 | 2122 | |
b6fbf22d | 2123 | goto endloop; |
755762fd | 2124 | |
83d2a861 | 2125 | default: log_write(0, LOG_PANIC, "%s:%d:%s: should not happen", |
755762fd | 2126 | __FILE__, __LINE__, __FUNCTION__); |
b6fbf22d | 2127 | } |
0f0c8159 | 2128 | } |
b6fbf22d | 2129 | } |
91e974f5 | 2130 | |
b6fbf22d JH |
2131 | endloop: |
2132 | ||
46682a67 JH |
2133 | if (nread == -1) error_message = US"EOF from scanner"; |
2134 | else if (nread < 0) error_message = US"timeout from scanner"; | |
2135 | else if (nread == 0) error_message = US"got nothing from scanner"; | |
91e974f5 | 2136 | else if (buf[0] != '2') error_message = buf; |
ad93c40f | 2137 | |
91e974f5 HSHR |
2138 | DEBUG(D_acl) debug_printf_indent("sent to avast QUIT\n"); |
2139 | if (send(sock, "QUIT\n", 5, 0) == -1) | |
2140 | return m_panic_defer_3(scanent, CUS callout_address, | |
2141 | string_sprintf("unable to send quit request to socket (%s): %s", | |
2142 | scanner_options, strerror(errno)), sock); | |
2143 | ||
2144 | if (error_message) | |
2145 | return m_panic_defer_3(scanent, CUS callout_address, error_message, sock); | |
ad93c40f | 2146 | |
b6fbf22d | 2147 | } |
c11d665d | 2148 | #endif |
0f0c8159 | 2149 | } /* scanner type switch */ |
8523533c | 2150 | |
0f0c8159 JH |
2151 | if (sock >= 0) |
2152 | (void) close (sock); | |
2153 | malware_ok = TRUE; /* set "been here, done that" marker */ | |
b1f8e4f8 | 2154 | } |
8523533c | 2155 | |
0f0c8159 JH |
2156 | /* match virus name against pattern (caseless ------->----------v) */ |
2157 | if (malware_name && regex_match_and_setup(re, malware_name, 0, -1)) | |
2158 | { | |
e1d04f48 | 2159 | DEBUG(D_acl) debug_printf_indent( |
0f0c8159 JH |
2160 | "Matched regex to malware [%s] [%s]\n", malware_re, malware_name); |
2161 | return OK; | |
2162 | } | |
2163 | else | |
2164 | return FAIL; | |
8523533c TK |
2165 | } |
2166 | ||
2167 | ||
0f0c8159 JH |
2168 | /************************************************* |
2169 | * Scan an email for malware * | |
2170 | *************************************************/ | |
8523533c | 2171 | |
0f0c8159 JH |
2172 | /* This is the normal interface for scanning an email, which doesn't need a |
2173 | filename; it's a wrapper around the malware_file function. | |
8523533c | 2174 | |
0f0c8159 JH |
2175 | Arguments: |
2176 | malware_re match condition for "malware=" | |
2177 | timeout if nonzero, timeout in seconds | |
2178 | ||
2179 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) | |
2180 | where true means malware was found (condition applies) | |
2181 | */ | |
2182 | int | |
2183 | malware(const uschar * malware_re, int timeout) | |
8523533c | 2184 | { |
040721f2 | 2185 | int ret = malware_internal(malware_re, NULL, timeout); |
8e669ac1 | 2186 | |
55240832 | 2187 | if (ret == DEFER) av_failed = TRUE; |
55240832 | 2188 | return ret; |
8523533c TK |
2189 | } |
2190 | ||
8e669ac1 | 2191 | |
0f0c8159 JH |
2192 | /************************************************* |
2193 | * Scan a file for malware * | |
2194 | *************************************************/ | |
8e669ac1 | 2195 | |
0f0c8159 JH |
2196 | /* This is a test wrapper for scanning an email, which is not used in |
2197 | normal processing. Scan any file, using the Exim scanning interface. | |
2198 | This function tampers with various global variables so is unsafe to use | |
2199 | in any other context. | |
8e669ac1 | 2200 | |
0f0c8159 JH |
2201 | Arguments: |
2202 | eml_filename a file holding the message to be scanned | |
8523533c | 2203 | |
0f0c8159 JH |
2204 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) |
2205 | where true means malware was found (condition applies) | |
2206 | */ | |
2207 | int | |
2208 | malware_in_file(uschar *eml_filename) | |
8523533c | 2209 | { |
55240832 JH |
2210 | uschar message_id_buf[64]; |
2211 | int ret; | |
2212 | ||
2213 | /* spool_mbox() assumes various parameters exist, when creating | |
2214 | the relevant directory and the email within */ | |
2215 | ||
2216 | (void) string_format(message_id_buf, sizeof(message_id_buf), | |
2217 | "dummy-%d", vaguely_random_number(INT_MAX)); | |
2218 | message_id = message_id_buf; | |
2219 | sender_address = US"malware-sender@example.net"; | |
2220 | return_path = US""; | |
2221 | recipients_list = NULL; | |
2222 | receive_add_recipient(US"malware-victim@example.net", -1); | |
2223 | enable_dollar_recipients = TRUE; | |
2224 | ||
040721f2 | 2225 | ret = malware_internal(US"*", eml_filename, 0); |
55240832 JH |
2226 | |
2227 | Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id)); | |
2228 | spool_mbox_ok = 1; | |
2229 | ||
2230 | /* don't set no_mbox_unspool; at present, there's no way for it to become | |
2231 | set, but if that changes, then it should apply to these tests too */ | |
2232 | ||
2233 | unspool_mbox(); | |
2234 | ||
2235 | /* silence static analysis tools */ | |
2236 | message_id = NULL; | |
2237 | ||
2238 | return ret; | |
8523533c TK |
2239 | } |
2240 | ||
476be7e2 JH |
2241 | |
2242 | void | |
2243 | malware_init(void) | |
2244 | { | |
2245 | if (!malware_default_re) | |
2246 | malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE); | |
c11d665d JH |
2247 | |
2248 | #ifndef DISABLE_MAL_DRWEB | |
476be7e2 JH |
2249 | if (!drweb_re) |
2250 | drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE); | |
c11d665d JH |
2251 | #endif |
2252 | #ifndef DISABLE_MAL_FSECURE | |
476be7e2 JH |
2253 | if (!fsec_re) |
2254 | fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE); | |
c11d665d JH |
2255 | #endif |
2256 | #ifndef DISABLE_MAL_KAV | |
476be7e2 JH |
2257 | if (!kav_re_sus) |
2258 | kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE); | |
2259 | if (!kav_re_inf) | |
2260 | kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE); | |
c11d665d | 2261 | #endif |
fd5a6ffb | 2262 | #ifndef DISABLE_MAL_AVAST |
476be7e2 JH |
2263 | if (!ava_re_clean) |
2264 | ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE); | |
2265 | if (!ava_re_virus) | |
2266 | ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE); | |
ad93c40f HSHR |
2267 | if (!ava_re_error) |
2268 | ava_re_error = regex_must_compile(ava_re_error_str, FALSE, TRUE); | |
c11d665d | 2269 | #endif |
fd5a6ffb | 2270 | #ifndef DISABLE_MAL_FFROT6D |
71b32d41 ACK |
2271 | if (!fprot6d_re_error) |
2272 | fprot6d_re_error = regex_must_compile(fprot6d_re_error_str, FALSE, TRUE); | |
2273 | if (!fprot6d_re_virus) | |
2274 | fprot6d_re_virus = regex_must_compile(fprot6d_re_virus_str, FALSE, TRUE); | |
c11d665d JH |
2275 | #endif |
2276 | } | |
2277 | ||
2278 | ||
2279 | void | |
2280 | malware_show_supported(FILE * f) | |
2281 | { | |
2282 | struct scan * sc; | |
2283 | fprintf(f, "Malware:"); | |
2284 | for (sc = m_scans; sc->scancode != -1; sc++) fprintf(f, " %s", sc->name); | |
2285 | fprintf(f, "\n"); | |
476be7e2 JH |
2286 | } |
2287 | ||
c11d665d JH |
2288 | |
2289 | # endif /*!MACRO_PREDEF*/ | |
b1f8e4f8 JH |
2290 | #endif /*WITH_CONTENT_SCAN*/ |
2291 | /* | |
2292 | * vi: aw ai sw=2 | |
2293 | */ |