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