Commit | Line | Data |
---|---|---|
8523533c TK |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
5a66c31b | 5 | /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-2014 */ |
8523533c TK |
6 | /* License: GPL */ |
7 | ||
8 | /* Code for calling virus (malware) scanners. Called from acl.c. */ | |
9 | ||
10 | #include "exim.h" | |
11 | #ifdef WITH_CONTENT_SCAN | |
12 | ||
b1f8e4f8 | 13 | typedef enum {M_FPROTD, M_DRWEB, M_AVES, M_FSEC, M_KAVD, M_CMDL, |
b6fbf22d | 14 | M_SOPHIE, M_CLAMD, M_SOCK, M_MKSD, M_AVAST} scanner_t; |
b1f8e4f8 JH |
15 | typedef enum {MC_NONE, MC_TCP, MC_UNIX, MC_STRM} contype_t; |
16 | static struct scan | |
17 | { | |
18 | scanner_t scancode; | |
19 | const uschar * name; | |
20 | const uschar * options_default; | |
21 | contype_t conn; | |
22 | } m_scans[] = | |
23 | { | |
24 | { M_FPROTD, US"f-protd", US"localhost 10200-10204", MC_TCP }, | |
25 | { M_DRWEB, US"drweb", US"/usr/local/drweb/run/drwebd.sock", MC_STRM }, | |
26 | { M_AVES, US"aveserver", US"/var/run/aveserver", MC_UNIX }, | |
27 | { M_FSEC, US"fsecure", US"/var/run/.fsav", MC_UNIX }, | |
28 | { M_KAVD, US"kavdaemon", US"/var/run/AvpCtl", MC_UNIX }, | |
29 | { M_CMDL, US"cmdline", NULL, MC_NONE }, | |
30 | { M_SOPHIE, US"sophie", US"/var/run/sophie", MC_UNIX }, | |
31 | { M_CLAMD, US"clamd", US"/tmp/clamd", MC_NONE }, | |
32 | { M_SOCK, US"sock", US"/tmp/malware.sock", MC_STRM }, | |
33 | { M_MKSD, US"mksd", NULL, MC_NONE }, | |
b6fbf22d | 34 | { M_AVAST, US"avast", US"/var/run/avast/scan.sock", MC_STRM }, |
b1f8e4f8 JH |
35 | { -1, NULL, NULL, MC_NONE } /* end-marker */ |
36 | }; | |
37 | ||
599dcb77 TL |
38 | /* The maximum number of clamd servers that are supported in the configuration */ |
39 | #define MAX_CLAMD_SERVERS 32 | |
40 | #define MAX_CLAMD_SERVERS_S "32" | |
41 | /* Maximum length of the hostname that can be specified in the clamd address list */ | |
42 | #define MAX_CLAMD_ADDRESS_LENGTH 64 | |
43 | #define MAX_CLAMD_ADDRESS_LENGTH_S "64" | |
44 | ||
45 | typedef struct clamd_address_container { | |
c3680ef0 | 46 | uschar tcp_addr[MAX_CLAMD_ADDRESS_LENGTH+1]; |
599dcb77 TL |
47 | unsigned int tcp_port; |
48 | } clamd_address_container; | |
49 | ||
b1f8e4f8 JH |
50 | #ifndef nelements |
51 | # define nelements(arr) (sizeof(arr) / sizeof(arr[0])) | |
8523533c TK |
52 | #endif |
53 | ||
a9ccd69a | 54 | |
0f0c8159 | 55 | #define MALWARE_TIMEOUT 120 /* default timeout, seconds */ |
a9ccd69a PH |
56 | |
57 | ||
8523533c TK |
58 | #define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */ |
59 | #define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */ | |
60 | #define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */ | |
61 | ||
2376f2f5 TK |
62 | #define DERR_READ_ERR (1<<0) /* read error */ |
63 | #define DERR_NOMEMORY (1<<2) /* no memory */ | |
64 | #define DERR_TIMEOUT (1<<9) /* scan timeout has run out */ | |
65 | #define DERR_BAD_CALL (1<<15) /* wrong command */ | |
66 | ||
476be7e2 JH |
67 | |
68 | static const uschar * malware_regex_default = US ".+"; | |
69 | static const pcre * malware_default_re = NULL; | |
70 | ||
71 | static const uschar * drweb_re_str = US "infected\\swith\\s*(.+?)$"; | |
72 | static const pcre * drweb_re = NULL; | |
73 | ||
74 | static const uschar * fsec_re_str = US "\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$"; | |
75 | static const pcre * fsec_re = NULL; | |
76 | ||
77 | static const uschar * kav_re_sus_str = US "suspicion:\\s*(.+?)\\s*$"; | |
78 | static const uschar * kav_re_inf_str = US "infected:\\s*(.+?)\\s*$"; | |
79 | static const pcre * kav_re_sus = NULL; | |
80 | static const pcre * kav_re_inf = NULL; | |
81 | ||
82 | static const uschar * ava_re_clean_str = US "(?!\\\\)\\t\\[\\+\\]"; | |
83 | static const uschar * ava_re_virus_str = US "(?!\\\\)\\t\\[L\\]\\d\\.\\d\\t\\d\\s(.*)"; | |
84 | static const pcre * ava_re_clean = NULL; | |
85 | static const pcre * ava_re_virus = NULL; | |
86 | ||
87 | ||
88 | ||
89 | /******************************************************************************/ | |
90 | ||
b1f8e4f8 | 91 | /* Routine to check whether a system is big- or little-endian. |
8523533c TK |
92 | Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html |
93 | Needed for proper kavdaemon implementation. Sigh. */ | |
94 | #define BIG_MY_ENDIAN 0 | |
95 | #define LITTLE_MY_ENDIAN 1 | |
b1f8e4f8 JH |
96 | static int test_byte_order(void); |
97 | static inline int | |
98 | test_byte_order() | |
99 | { | |
100 | short int word = 0x0001; | |
101 | char *byte = (char *) &word; | |
102 | return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN); | |
8523533c TK |
103 | } |
104 | ||
b1f8e4f8 | 105 | BOOL malware_ok = FALSE; |
8523533c | 106 | |
8544e77a PP |
107 | /* Gross hacks for the -bmalware option; perhaps we should just create |
108 | the scan directory normally for that case, but look into rigging up the | |
109 | needed header variables if not already set on the command-line? */ | |
110 | extern int spool_mbox_ok; | |
111 | extern uschar spooled_message_id[17]; | |
112 | ||
8544e77a PP |
113 | |
114 | ||
b1f8e4f8 JH |
115 | static inline int |
116 | malware_errlog_defer(const uschar * str) | |
117 | { | |
118 | log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str); | |
119 | return DEFER; | |
120 | } | |
121 | ||
122 | static int | |
123 | m_errlog_defer(struct scan * scanent, const uschar * str) | |
124 | { | |
125 | return malware_errlog_defer(string_sprintf("%s: %s", scanent->name, str)); | |
126 | } | |
127 | static int | |
128 | m_errlog_defer_3(struct scan * scanent, const uschar * str, | |
129 | int fd_to_close) | |
130 | { | |
131 | (void) close(fd_to_close); | |
132 | return m_errlog_defer(scanent, str); | |
133 | } | |
134 | ||
135 | /*************************************************/ | |
136 | ||
137 | /* Only used by the Clamav code, which is working from a list of servers and | |
138 | uses the returned in_addr to get a second connection to the same system. | |
139 | */ | |
140 | static inline int | |
141 | m_tcpsocket(const uschar * hostname, unsigned int port, | |
142 | host_item * host, uschar ** errstr) | |
143 | { | |
144 | return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5, host, errstr); | |
145 | } | |
146 | ||
b1f8e4f8 JH |
147 | static int |
148 | m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr) | |
149 | { | |
150 | if (send(sock, buf, cnt, 0) < 0) { | |
151 | int err = errno; | |
152 | (void)close(sock); | |
153 | *errstr = string_sprintf("unable to send to socket (%s): %s", | |
154 | buf, strerror(err)); | |
155 | return -1; | |
156 | } | |
157 | return sock; | |
158 | } | |
159 | ||
160 | static const pcre * | |
161 | m_pcre_compile(const uschar * re, uschar ** errstr) | |
162 | { | |
163 | const uschar * rerror; | |
164 | int roffset; | |
165 | const pcre * cre; | |
166 | ||
167 | cre = pcre_compile(CS re, PCRE_COPT, (const char **)&rerror, &roffset, NULL); | |
168 | if (!cre) | |
169 | *errstr= string_sprintf("regular expression error in '%s': %s at offset %d", | |
170 | re, rerror, roffset); | |
171 | return cre; | |
172 | } | |
173 | ||
174 | uschar * | |
175 | m_pcre_exec(const pcre * cre, uschar * text) | |
176 | { | |
177 | int ovector[10*3]; | |
178 | int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0, | |
179 | ovector, nelements(ovector)); | |
180 | uschar * substr = NULL; | |
181 | if (i >= 2) /* Got it */ | |
182 | pcre_get_substring(CS text, ovector, i, 1, (const char **) &substr); | |
183 | return substr; | |
184 | } | |
185 | ||
186 | static const pcre * | |
55414b25 JH |
187 | m_pcre_nextinlist(const uschar ** list, int * sep, |
188 | char * listerr, uschar ** errstr) | |
b1f8e4f8 JH |
189 | { |
190 | const uschar * list_ele; | |
191 | const pcre * cre = NULL; | |
192 | ||
193 | if (!(list_ele = string_nextinlist(list, sep, NULL, 0))) | |
194 | *errstr = US listerr; | |
195 | else | |
196 | cre = m_pcre_compile(CUS list_ele, errstr); | |
197 | return cre; | |
198 | } | |
199 | ||
4e71661f JH |
200 | /* |
201 | Simple though inefficient wrapper for reading a line. Drop CRs and the | |
202 | trailing newline. Can return early on buffer full. Null-terminate. | |
203 | Apply initial timeout if no data ready. | |
204 | ||
0f0c8159 JH |
205 | Return: number of chars - zero for an empty line |
206 | -1 on EOF | |
207 | -2 on timeout or error | |
4e71661f JH |
208 | */ |
209 | static int | |
210 | recv_line(int fd, uschar * buffer, int bsize, int tmo) | |
211 | { | |
212 | uschar * p = buffer; | |
213 | ssize_t rcv; | |
0f0c8159 | 214 | BOOL ok = FALSE; |
4e71661f JH |
215 | |
216 | if (!fd_ready(fd, tmo-time(NULL))) | |
0f0c8159 | 217 | return -2; |
4e71661f | 218 | |
0f0c8159 | 219 | /*XXX tmo handling assumes we always get a whole line */ |
4e71661f | 220 | /* read until \n */ |
0f0c8159 | 221 | errno = 0; |
4e71661f JH |
222 | while ((rcv = read(fd, p, 1)) > 0) |
223 | { | |
0f0c8159 | 224 | ok = TRUE; |
4e71661f JH |
225 | if (p-buffer > bsize-2) break; |
226 | if (*p == '\n') break; | |
227 | if (*p != '\r') p++; | |
228 | } | |
0f0c8159 JH |
229 | if (!ok) |
230 | { | |
231 | DEBUG(D_acl) debug_printf("Malware scan: read %s (%s)\n", | |
232 | rcv==0 ? "EOF" : "error", strerror(errno)); | |
233 | return rcv==0 ? -1 : -2; | |
234 | } | |
4e71661f JH |
235 | *p = '\0'; |
236 | ||
237 | DEBUG(D_acl) debug_printf("Malware scan: read '%s'\n", buffer); | |
238 | return p - buffer; | |
239 | } | |
240 | ||
241 | /* return TRUE iff size as requested */ | |
242 | static BOOL | |
243 | recv_len(int sock, void * buf, int size, int tmo) | |
244 | { | |
245 | return fd_ready(sock, tmo-time(NULL)) | |
246 | ? recv(sock, buf, size, 0) == size | |
247 | : FALSE; | |
248 | } | |
249 | ||
250 | ||
0f0c8159 JH |
251 | |
252 | /* ============= private routines for the "mksd" scanner type ============== */ | |
253 | ||
254 | #include <sys/uio.h> | |
255 | ||
256 | static inline int | |
257 | mksd_writev (int sock, struct iovec * iov, int iovcnt) | |
258 | { | |
259 | int i; | |
260 | ||
261 | for (;;) | |
262 | { | |
263 | do | |
264 | i = writev (sock, iov, iovcnt); | |
265 | while (i < 0 && errno == EINTR); | |
266 | if (i <= 0) | |
267 | { | |
268 | (void) malware_errlog_defer( | |
269 | US"unable to write to mksd UNIX socket (/var/run/mksd/socket)"); | |
270 | return -1; | |
271 | } | |
272 | for (;;) /* check for short write */ | |
273 | if (i >= iov->iov_len) | |
274 | { | |
275 | if (--iovcnt == 0) | |
276 | return 0; | |
277 | i -= iov->iov_len; | |
278 | iov++; | |
279 | } | |
280 | else | |
281 | { | |
282 | iov->iov_len -= i; | |
283 | iov->iov_base = CS iov->iov_base + i; | |
284 | break; | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | static inline int | |
290 | mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, int tmo) | |
291 | { | |
292 | int offset = 0; | |
293 | int i; | |
294 | ||
295 | do | |
296 | { | |
297 | i = ip_recv(sock, av_buffer+offset, av_buffer_size-offset, tmo-time(NULL)); | |
298 | if (i <= 0) | |
299 | { | |
300 | (void) malware_errlog_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)"); | |
301 | return -1; | |
302 | } | |
303 | ||
304 | offset += i; | |
305 | /* offset == av_buffer_size -> buffer full */ | |
306 | if (offset == av_buffer_size) | |
307 | { | |
308 | (void) malware_errlog_defer(US"malformed reply received from mksd"); | |
309 | return -1; | |
310 | } | |
311 | } while (av_buffer[offset-1] != '\n'); | |
312 | ||
313 | av_buffer[offset] = '\0'; | |
314 | return offset; | |
315 | } | |
316 | ||
317 | static inline int | |
318 | mksd_parse_line(struct scan * scanent, char * line) | |
319 | { | |
320 | char *p; | |
321 | ||
322 | switch (*line) | |
323 | { | |
324 | case 'O': /* OK */ | |
325 | return OK; | |
326 | ||
327 | case 'E': | |
328 | case 'A': /* ERR */ | |
329 | if ((p = strchr (line, '\n')) != NULL) | |
330 | *p = '\0'; | |
331 | return m_errlog_defer(scanent, | |
332 | string_sprintf("scanner failed: %s", line)); | |
333 | ||
334 | default: /* VIR */ | |
335 | if ((p = strchr (line, '\n')) != NULL) | |
336 | { | |
337 | *p = '\0'; | |
338 | if ( p-line > 5 | |
339 | && line[3] == ' ' | |
340 | && (p = strchr(line+4, ' ')) != NULL | |
341 | && p-line > 4 | |
342 | ) | |
343 | { | |
344 | *p = '\0'; | |
345 | malware_name = string_copy(US line+4); | |
346 | return OK; | |
347 | } | |
348 | } | |
349 | return m_errlog_defer(scanent, | |
350 | string_sprintf("malformed reply received: %s", line)); | |
351 | } | |
352 | } | |
353 | ||
354 | static int | |
355 | mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename, | |
356 | int tmo) | |
357 | { | |
358 | struct iovec iov[3]; | |
359 | const char *cmd = "MSQ\n"; | |
360 | uschar av_buffer[1024]; | |
361 | ||
362 | iov[0].iov_base = (void *) cmd; | |
363 | iov[0].iov_len = 3; | |
364 | iov[1].iov_base = (void *) scan_filename; | |
365 | iov[1].iov_len = Ustrlen(scan_filename); | |
366 | iov[2].iov_base = (void *) (cmd + 3); | |
367 | iov[2].iov_len = 1; | |
368 | ||
369 | if (mksd_writev (sock, iov, 3) < 0) | |
370 | return DEFER; | |
371 | ||
372 | if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0) | |
373 | return DEFER; | |
374 | ||
375 | return mksd_parse_line (scanent, CS av_buffer); | |
376 | } | |
377 | ||
8544e77a PP |
378 | /************************************************* |
379 | * Scan content for malware * | |
380 | *************************************************/ | |
381 | ||
382 | /* This is an internal interface for scanning an email; the normal interface | |
383 | is via malware(), or there's malware_in_file() used for testing/debugging. | |
384 | ||
385 | Arguments: | |
0f0c8159 | 386 | malware_re match condition for "malware=" |
8544e77a | 387 | eml_filename the file holding the email to be scanned |
0f0c8159 | 388 | timeout if nonzero, non-default timeoutl |
8544e77a PP |
389 | faking whether or not we're faking this up for the -bmalware test |
390 | ||
391 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) | |
392 | where true means malware was found (condition applies) | |
393 | */ | |
b1f8e4f8 | 394 | static int |
0f0c8159 JH |
395 | malware_internal(const uschar * malware_re, const uschar * eml_filename, |
396 | int timeout, BOOL faking) | |
b1f8e4f8 | 397 | { |
0f0c8159 | 398 | int sep = 0; |
55414b25 | 399 | const uschar *av_scanner_work = av_scanner; |
0f0c8159 | 400 | uschar *scanner_name; |
0f0c8159 JH |
401 | unsigned long mbox_size; |
402 | FILE *mbox_file; | |
403 | const pcre *re; | |
404 | uschar * errstr; | |
405 | struct scan * scanent; | |
406 | const uschar * scanner_options; | |
407 | int sock = -1; | |
408 | time_t tmo; | |
409 | ||
410 | /* make sure the eml mbox file is spooled up */ | |
411 | if (!(mbox_file = spool_mbox(&mbox_size, faking ? eml_filename : NULL))) | |
412 | return malware_errlog_defer(US"error while creating mbox spool file"); | |
413 | ||
414 | /* none of our current scanners need the mbox | |
415 | file as a stream, so we can close it right away */ | |
416 | (void)fclose(mbox_file); | |
417 | ||
418 | if (!malware_re) | |
419 | return FAIL; /* empty means "don't match anything" */ | |
420 | ||
421 | /* parse 1st option */ | |
422 | if ( (strcmpic(malware_re, US"false") == 0) || | |
423 | (Ustrcmp(malware_re,"0") == 0) ) | |
424 | return FAIL; /* explicitly no matching */ | |
425 | ||
426 | /* special cases (match anything except empty) */ | |
476be7e2 JH |
427 | if ( strcmpic(malware_re,US"true") == 0 |
428 | || Ustrcmp(malware_re,"*") == 0 | |
429 | || Ustrcmp(malware_re,"1") == 0 | |
430 | ) | |
431 | { | |
432 | if ( !malware_default_re | |
433 | && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr))) | |
434 | return malware_errlog_defer(errstr); | |
0f0c8159 | 435 | malware_re = malware_regex_default; |
476be7e2 JH |
436 | re = malware_default_re; |
437 | } | |
0f0c8159 JH |
438 | |
439 | /* compile the regex, see if it works */ | |
476be7e2 | 440 | else if (!(re = m_pcre_compile(malware_re, &errstr))) |
0f0c8159 JH |
441 | return malware_errlog_defer(errstr); |
442 | ||
476be7e2 JH |
443 | /* Reset sep that is set by previous string_nextinlist() call */ |
444 | sep = 0; | |
445 | ||
0f0c8159 JH |
446 | /* if av_scanner starts with a dollar, expand it first */ |
447 | if (*av_scanner == '$') | |
448 | { | |
449 | if (!(av_scanner_work = expand_string(av_scanner))) | |
450 | return malware_errlog_defer( | |
451 | string_sprintf("av_scanner starts with $, but expansion failed: %s", | |
452 | expand_string_message)); | |
b1f8e4f8 | 453 | |
0f0c8159 | 454 | DEBUG(D_acl) |
b1f8e4f8 | 455 | debug_printf("Expanded av_scanner global: %s\n", av_scanner_work); |
0f0c8159 JH |
456 | /* disable result caching in this case */ |
457 | malware_name = NULL; | |
458 | malware_ok = FALSE; | |
8523533c TK |
459 | } |
460 | ||
0f0c8159 JH |
461 | /* Do not scan twice (unless av_scanner is dynamic). */ |
462 | if (!malware_ok) | |
463 | { | |
464 | /* find the scanner type from the av_scanner option */ | |
465 | if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0))) | |
466 | return malware_errlog_defer(US"av_scanner configuration variable is empty"); | |
467 | if (!timeout) timeout = MALWARE_TIMEOUT; | |
468 | tmo = time(NULL) + timeout; | |
469 | ||
3e60dd41 JH |
470 | for (scanent = m_scans; ; scanent++) |
471 | { | |
0f0c8159 JH |
472 | if (!scanent->name) |
473 | return malware_errlog_defer(string_sprintf("unknown scanner type '%s'", | |
474 | scanner_name)); | |
475 | if (strcmpic(scanner_name, US scanent->name) != 0) | |
476 | continue; | |
477 | if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0))) | |
478 | scanner_options = scanent->options_default; | |
479 | if (scanent->conn == MC_NONE) | |
b1f8e4f8 | 480 | break; |
0f0c8159 JH |
481 | switch(scanent->conn) |
482 | { | |
3e60dd41 JH |
483 | case MC_TCP: sock = ip_tcpsocket(scanner_options, &errstr, 5); break; |
484 | case MC_UNIX: sock = ip_unixsocket(scanner_options, &errstr); break; | |
485 | case MC_STRM: sock = ip_streamsocket(scanner_options, &errstr, 5); break; | |
0f0c8159 | 486 | default: /* compiler quietening */ break; |
384152a6 | 487 | } |
0f0c8159 JH |
488 | if (sock < 0) |
489 | return m_errlog_defer(scanent, errstr); | |
490 | break; | |
491 | } | |
492 | DEBUG(D_acl) debug_printf("Malware scan: %s tmo %s\n", scanner_name, readconf_printtime(timeout)); | |
8e669ac1 | 493 | |
0f0c8159 JH |
494 | switch (scanent->scancode) |
495 | { | |
496 | case M_FPROTD: /* "f-protd" scanner type -------------------------------- */ | |
b1f8e4f8 | 497 | { |
0f0c8159 JH |
498 | uschar *fp_scan_option; |
499 | unsigned int detected=0, par_count=0; | |
500 | uschar * scanrequest; | |
501 | uschar buf[32768], *strhelper, *strhelper2; | |
502 | uschar * malware_name_internal = NULL; | |
503 | int len; | |
b1f8e4f8 | 504 | |
0f0c8159 | 505 | scanrequest = string_sprintf("GET %s", eml_filename); |
b1f8e4f8 | 506 | |
0f0c8159 JH |
507 | while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep, |
508 | NULL, 0))) | |
509 | { | |
510 | scanrequest = string_sprintf("%s%s%s", scanrequest, | |
511 | par_count ? "%20" : "?", fp_scan_option); | |
512 | par_count++; | |
513 | } | |
514 | scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest); | |
515 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s: %s\n", | |
516 | scanner_name, scanrequest); | |
b1f8e4f8 | 517 | |
0f0c8159 JH |
518 | /* send scan request */ |
519 | if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0) | |
520 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 521 | |
0f0c8159 JH |
522 | while ((len = recv_line(sock, buf, sizeof(buf), tmo)) >= 0) |
523 | if (len > 0) | |
524 | { | |
525 | if (Ustrstr(buf, US"<detected type=\"") != NULL) | |
526 | detected = 1; | |
527 | else if (detected && (strhelper = Ustrstr(buf, US"<name>"))) | |
4e71661f | 528 | { |
0f0c8159 | 529 | if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL) |
4e71661f | 530 | { |
0f0c8159 JH |
531 | *strhelper2 = '\0'; |
532 | malware_name_internal = string_copy(strhelper+6); | |
4e71661f JH |
533 | } |
534 | } | |
0f0c8159 | 535 | else if (Ustrstr(buf, US"<summary code=\"")) |
4e71661f | 536 | { |
0f0c8159 JH |
537 | malware_name = Ustrstr(buf, US"<summary code=\"11\">") |
538 | ? malware_name_internal : NULL; | |
539 | break; | |
4e71661f | 540 | } |
0f0c8159 JH |
541 | } |
542 | if (len < -1) | |
543 | { | |
544 | (void)close(sock); | |
545 | return DEFER; | |
546 | } | |
547 | break; | |
548 | } /* f-protd */ | |
b1f8e4f8 | 549 | |
0f0c8159 JH |
550 | case M_DRWEB: /* "drweb" scanner type ----------------------------------- */ |
551 | /* v0.1 - added support for tcp sockets */ | |
552 | /* v0.0 - initial release -- support for unix sockets */ | |
553 | { | |
554 | int result; | |
555 | off_t fsize; | |
556 | unsigned int fsize_uint; | |
557 | uschar * tmpbuf, *drweb_fbuf; | |
558 | int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd, | |
559 | drweb_vnum, drweb_slen, drweb_fin = 0x0000; | |
0f0c8159 JH |
560 | |
561 | /* prepare variables */ | |
562 | drweb_cmd = htonl(DRWEBD_SCAN_CMD); | |
563 | drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL); | |
564 | ||
565 | if (*scanner_options != '/') | |
566 | { | |
567 | /* calc file size */ | |
568 | if ((drweb_fd = open(CCS eml_filename, O_RDONLY)) == -1) | |
569 | return m_errlog_defer_3(scanent, | |
570 | string_sprintf("can't open spool file %s: %s", | |
571 | eml_filename, strerror(errno)), | |
572 | sock); | |
b1f8e4f8 | 573 | |
0f0c8159 JH |
574 | if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1) |
575 | { | |
576 | int err = errno; | |
b1f8e4f8 | 577 | (void)close(drweb_fd); |
0f0c8159 JH |
578 | return m_errlog_defer_3(scanent, |
579 | string_sprintf("can't seek spool file %s: %s", | |
580 | eml_filename, strerror(err)), | |
581 | sock); | |
582 | } | |
583 | fsize_uint = (unsigned int) fsize; | |
584 | if ((off_t)fsize_uint != fsize) | |
585 | { | |
b1f8e4f8 | 586 | (void)close(drweb_fd); |
0f0c8159 JH |
587 | return m_errlog_defer_3(scanent, |
588 | string_sprintf("seeking spool file %s, size overflow", | |
589 | eml_filename), | |
590 | sock); | |
4e71661f | 591 | } |
0f0c8159 JH |
592 | drweb_slen = htonl(fsize); |
593 | lseek(drweb_fd, 0, SEEK_SET); | |
594 | ||
595 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s remote scan [%s]\n", | |
596 | scanner_name, scanner_options); | |
597 | ||
598 | /* send scan request */ | |
599 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
600 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
601 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) || | |
602 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0)) | |
4e71661f | 603 | { |
0f0c8159 JH |
604 | (void)close(drweb_fd); |
605 | return m_errlog_defer_3(scanent, string_sprintf( | |
606 | "unable to send commands to socket (%s)", scanner_options), | |
607 | sock); | |
4e71661f | 608 | } |
8e669ac1 | 609 | |
0f0c8159 JH |
610 | if (!(drweb_fbuf = (uschar *) malloc (fsize_uint))) |
611 | { | |
612 | (void)close(drweb_fd); | |
b1f8e4f8 | 613 | return m_errlog_defer_3(scanent, |
0f0c8159 JH |
614 | string_sprintf("unable to allocate memory %u for file (%s)", |
615 | fsize_uint, eml_filename), | |
616 | sock); | |
617 | } | |
b1f8e4f8 | 618 | |
0f0c8159 JH |
619 | if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1) |
620 | { | |
621 | int err = errno; | |
622 | (void)close(drweb_fd); | |
623 | free(drweb_fbuf); | |
b1f8e4f8 | 624 | return m_errlog_defer_3(scanent, |
0f0c8159 JH |
625 | string_sprintf("can't read spool file %s: %s", |
626 | eml_filename, strerror(err)), | |
627 | sock); | |
628 | } | |
629 | (void)close(drweb_fd); | |
b1f8e4f8 | 630 | |
0f0c8159 JH |
631 | /* send file body to socket */ |
632 | if (send(sock, drweb_fbuf, fsize, 0) < 0) | |
4e71661f | 633 | { |
0f0c8159 JH |
634 | free(drweb_fbuf); |
635 | return m_errlog_defer_3(scanent, string_sprintf( | |
636 | "unable to send file body to socket (%s)", scanner_options), | |
637 | sock); | |
638 | } | |
639 | (void)close(drweb_fd); | |
640 | } | |
641 | else | |
642 | { | |
643 | drweb_slen = htonl(Ustrlen(eml_filename)); | |
b1f8e4f8 | 644 | |
0f0c8159 JH |
645 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s local scan [%s]\n", |
646 | scanner_name, scanner_options); | |
b1f8e4f8 | 647 | |
0f0c8159 JH |
648 | /* send scan request */ |
649 | if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) || | |
650 | (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) || | |
651 | (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) || | |
652 | (send(sock, eml_filename, Ustrlen(eml_filename), 0) < 0) || | |
653 | (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0)) | |
654 | return m_errlog_defer_3(scanent, string_sprintf( | |
655 | "unable to send commands to socket (%s)", scanner_options), | |
656 | sock); | |
657 | } | |
b1f8e4f8 | 658 | |
0f0c8159 JH |
659 | /* wait for result */ |
660 | if (!recv_len(sock, &drweb_rc, sizeof(drweb_rc), tmo)) | |
661 | return m_errlog_defer_3(scanent, | |
662 | US"unable to read return code", sock); | |
663 | drweb_rc = ntohl(drweb_rc); | |
664 | ||
665 | if (!recv_len(sock, &drweb_vnum, sizeof(drweb_vnum), tmo)) | |
666 | return m_errlog_defer_3(scanent, | |
667 | US"unable to read the number of viruses", sock); | |
668 | drweb_vnum = ntohl(drweb_vnum); | |
669 | ||
670 | /* "virus(es) found" if virus number is > 0 */ | |
671 | if (drweb_vnum) | |
672 | { | |
673 | int i; | |
b1f8e4f8 | 674 | |
0f0c8159 JH |
675 | /* setup default virus name */ |
676 | malware_name = US"unknown"; | |
b1f8e4f8 | 677 | |
0f0c8159 | 678 | /* set up match regex */ |
476be7e2 JH |
679 | if (!drweb_re) |
680 | drweb_re = m_pcre_compile(drweb_re_str, &errstr); | |
b1f8e4f8 | 681 | |
0f0c8159 JH |
682 | /* read and concatenate virus names into one string */ |
683 | for (i = 0; i < drweb_vnum; i++) | |
4e71661f | 684 | { |
0f0c8159 JH |
685 | int size = 0, off = 0, ovector[10*3]; |
686 | /* read the size of report */ | |
687 | if (!recv_len(sock, &drweb_slen, sizeof(drweb_slen), tmo)) | |
b1f8e4f8 | 688 | return m_errlog_defer_3(scanent, |
0f0c8159 JH |
689 | US"cannot read report size", sock); |
690 | drweb_slen = ntohl(drweb_slen); | |
691 | tmpbuf = store_get(drweb_slen); | |
b1f8e4f8 | 692 | |
0f0c8159 JH |
693 | /* read report body */ |
694 | if (!recv_len(sock, tmpbuf, drweb_slen, tmo)) | |
695 | return m_errlog_defer_3(scanent, | |
696 | US"cannot read report string", sock); | |
697 | tmpbuf[drweb_slen] = '\0'; | |
8544e77a | 698 | |
0f0c8159 JH |
699 | /* try matcher on the line, grab substring */ |
700 | result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, | |
701 | ovector, nelements(ovector)); | |
702 | if (result >= 2) | |
703 | { | |
704 | const char * pre_malware_nb; | |
8e669ac1 | 705 | |
0f0c8159 | 706 | pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb); |
8e669ac1 | 707 | |
0f0c8159 JH |
708 | if (i==0) /* the first name we just copy to malware_name */ |
709 | malware_name = string_append(NULL, &size, &off, | |
710 | 1, pre_malware_nb); | |
8e669ac1 | 711 | |
0f0c8159 JH |
712 | else /* concatenate each new virus name to previous */ |
713 | malware_name = string_append(malware_name, &size, &off, | |
714 | 2, "/", pre_malware_nb); | |
8e669ac1 | 715 | |
0f0c8159 JH |
716 | pcre_free_substring(pre_malware_nb); |
717 | } | |
718 | } | |
719 | } | |
720 | else | |
721 | { | |
722 | const char *drweb_s = NULL; | |
723 | ||
724 | if (drweb_rc & DERR_READ_ERR) drweb_s = "read error"; | |
725 | if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory"; | |
726 | if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout"; | |
727 | if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command"; | |
728 | /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED. | |
729 | * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM, | |
730 | * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR | |
731 | * and others are ignored */ | |
732 | if (drweb_s) | |
733 | return m_errlog_defer_3(scanent, | |
734 | string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s), | |
735 | sock); | |
8e669ac1 | 736 | |
0f0c8159 | 737 | /* no virus found */ |
b1f8e4f8 | 738 | malware_name = NULL; |
0f0c8159 JH |
739 | } |
740 | break; | |
741 | } /* drweb */ | |
8e669ac1 | 742 | |
0f0c8159 JH |
743 | case M_AVES: /* "aveserver" scanner type -------------------------------- */ |
744 | { | |
745 | uschar buf[32768]; | |
746 | int result; | |
8544e77a | 747 | |
0f0c8159 JH |
748 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ |
749 | buf[0] = 0; | |
750 | recv_line(sock, buf, sizeof(buf), tmo); | |
8544e77a | 751 | |
0f0c8159 JH |
752 | if (buf[0] != '2') /* aveserver is having problems */ |
753 | return m_errlog_defer_3(scanent, | |
754 | string_sprintf("unavailable (Responded: %s).", | |
b1f8e4f8 | 755 | ((buf[0] != 0) ? buf : (uschar *)"nothing") ), |
0f0c8159 | 756 | sock); |
8e669ac1 | 757 | |
0f0c8159 JH |
758 | /* prepare our command */ |
759 | (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n", | |
760 | eml_filename); | |
761 | ||
762 | /* and send it */ | |
763 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s %s\n", | |
764 | scanner_name, buf); | |
765 | if (m_sock_send(sock, buf, Ustrlen(buf), &errstr) < 0) | |
766 | return m_errlog_defer(scanent, errstr); | |
767 | ||
768 | malware_name = NULL; | |
769 | result = 0; | |
770 | /* read response lines, find malware name and final response */ | |
771 | while (recv_line(sock, buf, sizeof(buf), tmo) > 0) | |
772 | { | |
773 | if (buf[0] == '2') | |
774 | break; | |
775 | if (buf[0] == '5') /* aveserver is having problems */ | |
4e71661f | 776 | { |
0f0c8159 JH |
777 | result = m_errlog_defer(scanent, |
778 | string_sprintf("unable to scan file %s (Responded: %s).", | |
779 | eml_filename, buf)); | |
780 | break; | |
4e71661f | 781 | } |
0f0c8159 JH |
782 | if (Ustrncmp(buf,"322",3) == 0) |
783 | { | |
784 | uschar *p = Ustrchr(&buf[4], ' '); | |
785 | *p = '\0'; | |
786 | malware_name = string_copy(&buf[4]); | |
787 | } | |
788 | } | |
789 | ||
790 | if (m_sock_send(sock, US"quit\r\n", 6, &errstr) < 0) | |
791 | return m_errlog_defer(scanent, errstr); | |
792 | ||
793 | /* read aveserver's greeting and see if it is ready (2xx greeting) */ | |
794 | buf[0] = 0; | |
795 | recv_line(sock, buf, sizeof(buf), tmo); | |
796 | ||
797 | if (buf[0] != '2') /* aveserver is having problems */ | |
798 | return m_errlog_defer_3(scanent, | |
799 | string_sprintf("unable to quit dialogue (Responded: %s).", | |
800 | ((buf[0] != 0) ? buf : (uschar *)"nothing") ), | |
801 | sock); | |
802 | ||
803 | if (result == DEFER) | |
804 | { | |
805 | (void)close(sock); | |
806 | return DEFER; | |
807 | } | |
808 | break; | |
b1f8e4f8 | 809 | } /* aveserver */ |
8e669ac1 | 810 | |
b1f8e4f8 JH |
811 | case M_FSEC: /* "fsecure" scanner type ---------------------------------- */ |
812 | { | |
0f0c8159 JH |
813 | int i, j, bread = 0; |
814 | uschar * file_name; | |
815 | uschar av_buffer[1024]; | |
0f0c8159 JH |
816 | static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n", |
817 | US"CONFIGURE\tTIMEOUT\t0\n", | |
818 | US"CONFIGURE\tMAXARCH\t5\n", | |
819 | US"CONFIGURE\tMIME\t1\n" }; | |
820 | ||
821 | malware_name = NULL; | |
822 | ||
823 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n", | |
824 | scanner_name, scanner_options); | |
825 | /* pass options */ | |
826 | memset(av_buffer, 0, sizeof(av_buffer)); | |
827 | for (i = 0; i != nelements(cmdopt); i++) | |
828 | { | |
b1f8e4f8 | 829 | |
0f0c8159 JH |
830 | if (m_sock_send(sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0) |
831 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 832 | |
0f0c8159 JH |
833 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); |
834 | if (bread > 0) av_buffer[bread]='\0'; | |
835 | if (bread < 0) | |
836 | return m_errlog_defer_3(scanent, | |
837 | string_sprintf("unable to read answer %d (%s)", i, strerror(errno)), | |
838 | sock); | |
839 | for (j = 0; j < bread; j++) | |
840 | if (av_buffer[j] == '\r' || av_buffer[j] == '\n') | |
841 | av_buffer[j] ='@'; | |
842 | } | |
8e669ac1 | 843 | |
0f0c8159 JH |
844 | /* pass the mailfile to fsecure */ |
845 | file_name = string_sprintf("SCAN\t%s\n", eml_filename); | |
b1f8e4f8 | 846 | |
0f0c8159 JH |
847 | if (m_sock_send(sock, file_name, Ustrlen(file_name), &errstr) < 0) |
848 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 849 | |
0f0c8159 JH |
850 | /* set up match */ |
851 | /* todo also SUSPICION\t */ | |
476be7e2 JH |
852 | if (!fsec_re) |
853 | fsec_re = m_pcre_compile(fsec_re_str, &errstr); | |
b1f8e4f8 | 854 | |
0f0c8159 JH |
855 | /* read report, linewise. Apply a timeout as the Fsecure daemon |
856 | sometimes wants an answer to "PING" but they won't tell us what */ | |
fd02dc0e | 857 | { |
0f0c8159 JH |
858 | uschar * p = av_buffer; |
859 | uschar * q; | |
fd02dc0e | 860 | |
0f0c8159 JH |
861 | for (;;) |
862 | { | |
863 | errno = ETIME; | |
864 | i = av_buffer+sizeof(av_buffer)-p; | |
865 | if ((bread= ip_recv(sock, p, i-1, tmo-time(NULL))) < 0) | |
866 | return m_errlog_defer_3(scanent, | |
867 | string_sprintf("unable to read result (%s)", strerror(errno)), | |
868 | sock); | |
b1f8e4f8 | 869 | |
0f0c8159 JH |
870 | for (p[bread] = '\0'; q = strchr(p, '\n'); p = q+1) |
871 | { | |
872 | *q = '\0'; | |
fd02dc0e | 873 | |
0f0c8159 JH |
874 | /* Really search for virus again? */ |
875 | if (!malware_name) | |
876 | /* try matcher on the line, grab substring */ | |
476be7e2 | 877 | malware_name = m_pcre_exec(fsec_re, p); |
fd02dc0e | 878 | |
0f0c8159 JH |
879 | if (Ustrstr(p, "OK\tScan ok.")) |
880 | goto fsec_found; | |
881 | } | |
fd02dc0e | 882 | |
0f0c8159 JH |
883 | /* copy down the trailing partial line then read another chunk */ |
884 | i = av_buffer+sizeof(av_buffer)-p; | |
885 | memmove(av_buffer, p, i); | |
886 | p = av_buffer+i; | |
fd02dc0e | 887 | } |
b1f8e4f8 | 888 | } |
fd02dc0e JH |
889 | |
890 | fsec_found: | |
b1f8e4f8 JH |
891 | break; |
892 | } /* fsecure */ | |
599dcb77 | 893 | |
b1f8e4f8 JH |
894 | case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */ |
895 | { | |
0f0c8159 JH |
896 | time_t t; |
897 | uschar tmpbuf[1024]; | |
898 | uschar * scanrequest; | |
899 | int kav_rc; | |
900 | unsigned long kav_reportlen, bread; | |
901 | const pcre *kav_re; | |
902 | uschar *p; | |
903 | ||
904 | /* get current date and time, build scan request */ | |
905 | time(&t); | |
906 | /* pdp note: before the eml_filename parameter, this scanned the | |
907 | directory; not finding documentation, so we'll strip off the directory. | |
908 | The side-effect is that the test framework scanning may end up in | |
909 | scanning more than was requested, but for the normal interface, this is | |
910 | fine. */ | |
911 | ||
912 | strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t)); | |
913 | scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename); | |
914 | p = Ustrrchr(scanrequest, '/'); | |
915 | if (p) | |
916 | *p = '\0'; | |
917 | ||
918 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n", | |
919 | scanner_name, scanner_options); | |
920 | ||
921 | /* send scan request */ | |
922 | if (m_sock_send(sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0) | |
923 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 924 | |
0f0c8159 JH |
925 | /* wait for result */ |
926 | if (!recv_len(sock, tmpbuf, 2, tmo)) | |
927 | return m_errlog_defer_3(scanent, | |
928 | US"unable to read 2 bytes from socket.", sock); | |
b1f8e4f8 | 929 | |
0f0c8159 JH |
930 | /* get errorcode from one nibble */ |
931 | kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F; | |
932 | switch(kav_rc) | |
933 | { | |
934 | case 5: case 6: /* improper kavdaemon configuration */ | |
935 | return m_errlog_defer_3(scanent, | |
936 | US"please reconfigure kavdaemon to NOT disinfect or remove infected files.", | |
937 | sock); | |
938 | case 1: | |
939 | return m_errlog_defer_3(scanent, | |
940 | US"reported 'scanning not completed' (code 1).", sock); | |
941 | case 7: | |
942 | return m_errlog_defer_3(scanent, | |
943 | US"reported 'kavdaemon damaged' (code 7).", sock); | |
944 | } | |
b1f8e4f8 | 945 | |
0f0c8159 JH |
946 | /* code 8 is not handled, since it is ambigous. It appears mostly on |
947 | bounces where part of a file has been cut off */ | |
b1f8e4f8 | 948 | |
0f0c8159 JH |
949 | /* "virus found" return codes (2-4) */ |
950 | if (kav_rc > 1 && kav_rc < 5) | |
b1f8e4f8 | 951 | { |
0f0c8159 | 952 | int report_flag = 0; |
599dcb77 | 953 | |
0f0c8159 JH |
954 | /* setup default virus name */ |
955 | malware_name = US"unknown"; | |
b1f8e4f8 | 956 | |
0f0c8159 | 957 | report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ]; |
b1f8e4f8 | 958 | |
0f0c8159 JH |
959 | /* read the report, if available */ |
960 | if (report_flag == 1) | |
961 | { | |
962 | /* read report size */ | |
963 | if (!recv_len(sock, &kav_reportlen, 4, tmo)) | |
964 | return m_errlog_defer_3(scanent, | |
965 | US"cannot read report size", sock); | |
b1f8e4f8 | 966 | |
0f0c8159 JH |
967 | /* it's possible that avp returns av_buffer[1] == 1 but the |
968 | reportsize is 0 (!?) */ | |
969 | if (kav_reportlen > 0) | |
4e71661f | 970 | { |
0f0c8159 | 971 | /* set up match regex, depends on retcode */ |
476be7e2 JH |
972 | if (kav_rc == 3) |
973 | { | |
974 | if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr); | |
975 | kav_re = kav_re_sus; | |
976 | } | |
977 | else | |
978 | { | |
979 | if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr); | |
980 | kav_re = kav_re_inf; | |
981 | } | |
0f0c8159 JH |
982 | |
983 | /* read report, linewise */ | |
984 | while (kav_reportlen > 0) | |
4e71661f | 985 | { |
0f0c8159 JH |
986 | if ((bread = recv_line(sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0) |
987 | break; | |
988 | kav_reportlen -= bread+1; | |
989 | ||
990 | /* try matcher on the line, grab substring */ | |
991 | if ((malware_name = m_pcre_exec(kav_re, tmpbuf))) | |
992 | break; | |
b1f8e4f8 JH |
993 | } |
994 | } | |
995 | } | |
0f0c8159 JH |
996 | } |
997 | else /* no virus found */ | |
998 | malware_name = NULL; | |
599dcb77 | 999 | |
0f0c8159 | 1000 | break; |
599dcb77 | 1001 | } |
8544e77a | 1002 | |
b1f8e4f8 JH |
1003 | case M_CMDL: /* "cmdline" scanner type ---------------------------------- */ |
1004 | { | |
0f0c8159 JH |
1005 | const uschar *cmdline_scanner = scanner_options; |
1006 | const pcre *cmdline_trigger_re; | |
1007 | const pcre *cmdline_regex_re; | |
1008 | uschar * file_name; | |
1009 | uschar * commandline; | |
1010 | void (*eximsigchld)(int); | |
1011 | void (*eximsigpipe)(int); | |
1012 | FILE *scanner_out = NULL; | |
1013 | int scanner_fd; | |
1014 | FILE *scanner_record = NULL; | |
1015 | uschar linebuffer[32767]; | |
1016 | int rcnt; | |
1017 | int trigger = 0; | |
1018 | uschar *p; | |
1019 | ||
1020 | if (!cmdline_scanner) | |
1021 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 1022 | |
0f0c8159 JH |
1023 | /* find scanner output trigger */ |
1024 | cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1025 | "missing trigger specification", &errstr); | |
1026 | if (!cmdline_trigger_re) | |
1027 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 1028 | |
0f0c8159 JH |
1029 | /* find scanner name regex */ |
1030 | cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1031 | "missing virus name regex specification", &errstr); | |
1032 | if (!cmdline_regex_re) | |
1033 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 1034 | |
0f0c8159 JH |
1035 | /* prepare scanner call; despite the naming, file_name holds a directory |
1036 | name which is documented as the value given to %s. */ | |
b1f8e4f8 | 1037 | |
0f0c8159 JH |
1038 | file_name = string_copy(eml_filename); |
1039 | p = Ustrrchr(file_name, '/'); | |
1040 | if (p) | |
1041 | *p = '\0'; | |
1042 | commandline = string_sprintf(CS cmdline_scanner, file_name); | |
b1f8e4f8 | 1043 | |
0f0c8159 JH |
1044 | /* redirect STDERR too */ |
1045 | commandline = string_sprintf("%s 2>&1", commandline); | |
b1f8e4f8 | 1046 | |
0f0c8159 JH |
1047 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n", |
1048 | scanner_name, commandline); | |
b1f8e4f8 | 1049 | |
0f0c8159 JH |
1050 | /* store exims signal handlers */ |
1051 | eximsigchld = signal(SIGCHLD,SIG_DFL); | |
1052 | eximsigpipe = signal(SIGPIPE,SIG_DFL); | |
b1f8e4f8 | 1053 | |
0f0c8159 JH |
1054 | if (!(scanner_out = popen(CS commandline,"r"))) |
1055 | { | |
1056 | int err = errno; | |
1057 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1058 | return m_errlog_defer(scanent, | |
1059 | string_sprintf("call (%s) failed: %s.", commandline, strerror(err))); | |
1060 | } | |
1061 | scanner_fd = fileno(scanner_out); | |
94a18f28 | 1062 | |
0f0c8159 JH |
1063 | file_name = string_sprintf("%s/scan/%s/%s_scanner_output", |
1064 | spool_directory, message_id, message_id); | |
b1f8e4f8 | 1065 | |
0f0c8159 JH |
1066 | if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE))) |
1067 | { | |
1068 | int err = errno; | |
1069 | (void) pclose(scanner_out); | |
1070 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1071 | return m_errlog_defer(scanent, string_sprintf( | |
1072 | "opening scanner output file (%s) failed: %s.", | |
1073 | file_name, strerror(err))); | |
1074 | } | |
8e669ac1 | 1075 | |
0f0c8159 JH |
1076 | /* look for trigger while recording output */ |
1077 | while ((rcnt = recv_line(scanner_fd, linebuffer, | |
1078 | sizeof(linebuffer), tmo))) | |
1079 | { | |
1080 | if (rcnt < 0) | |
1081 | if (rcnt == -1) | |
1082 | break; | |
1083 | else | |
4e71661f | 1084 | { |
0f0c8159 | 1085 | int err = errno; |
4e71661f JH |
1086 | (void) pclose(scanner_out); |
1087 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1088 | return m_errlog_defer(scanent, string_sprintf( | |
0f0c8159 JH |
1089 | "unable to read from scanner (%s): %s", |
1090 | commandline, strerror(err))); | |
4e71661f JH |
1091 | } |
1092 | ||
0f0c8159 JH |
1093 | if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record)) |
1094 | { | |
1095 | /* short write */ | |
1096 | (void) pclose(scanner_out); | |
1097 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1098 | return m_errlog_defer(scanent, string_sprintf( | |
1099 | "short write on scanner output file (%s).", file_name)); | |
4e71661f | 1100 | } |
0f0c8159 JH |
1101 | putc('\n', scanner_record); |
1102 | /* try trigger match */ | |
1103 | if ( !trigger | |
1104 | && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1) | |
1105 | ) | |
1106 | trigger = 1; | |
1107 | } | |
8e669ac1 | 1108 | |
0f0c8159 JH |
1109 | (void)fclose(scanner_record); |
1110 | sep = pclose(scanner_out); | |
1111 | signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe); | |
1112 | if (sep != 0) | |
1113 | return m_errlog_defer(scanent, | |
1114 | sep == -1 | |
1115 | ? string_sprintf("running scanner failed: %s", strerror(sep)) | |
1116 | : string_sprintf("scanner returned error code: %d", sep)); | |
b1f8e4f8 | 1117 | |
0f0c8159 JH |
1118 | if (trigger) |
1119 | { | |
1120 | uschar * s; | |
1121 | /* setup default virus name */ | |
1122 | malware_name = US"unknown"; | |
b1f8e4f8 | 1123 | |
0f0c8159 JH |
1124 | /* re-open the scanner output file, look for name match */ |
1125 | scanner_record = fopen(CS file_name, "rb"); | |
1126 | while (fgets(CS linebuffer, sizeof(linebuffer), scanner_record)) | |
1127 | { | |
1128 | /* try match */ | |
1129 | if ((s = m_pcre_exec(cmdline_regex_re, linebuffer))) | |
1130 | malware_name = s; | |
4e71661f | 1131 | } |
0f0c8159 JH |
1132 | (void)fclose(scanner_record); |
1133 | } | |
1134 | else /* no virus found */ | |
1135 | malware_name = NULL; | |
1136 | break; | |
b1f8e4f8 | 1137 | } /* cmdline */ |
599dcb77 | 1138 | |
b1f8e4f8 JH |
1139 | case M_SOPHIE: /* "sophie" scanner type --------------------------------- */ |
1140 | { | |
0f0c8159 JH |
1141 | int bread = 0; |
1142 | uschar *p; | |
1143 | uschar * file_name; | |
1144 | uschar av_buffer[1024]; | |
b1f8e4f8 | 1145 | |
0f0c8159 JH |
1146 | /* pass the scan directory to sophie */ |
1147 | file_name = string_copy(eml_filename); | |
1148 | if ((p = Ustrrchr(file_name, '/'))) | |
1149 | *p = '\0'; | |
b1f8e4f8 | 1150 | |
0f0c8159 JH |
1151 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan [%s]\n", |
1152 | scanner_name, scanner_options); | |
b1f8e4f8 | 1153 | |
0f0c8159 JH |
1154 | if ( write(sock, file_name, Ustrlen(file_name)) < 0 |
1155 | || write(sock, "\n", 1) != 1 | |
1156 | ) | |
1157 | return m_errlog_defer_3(scanent, | |
1158 | string_sprintf("unable to write to UNIX socket (%s)", scanner_options), | |
1159 | sock); | |
b1f8e4f8 | 1160 | |
0f0c8159 JH |
1161 | /* wait for result */ |
1162 | memset(av_buffer, 0, sizeof(av_buffer)); | |
1163 | if ((bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL))) <= 0) | |
1164 | return m_errlog_defer_3(scanent, | |
1165 | string_sprintf("unable to read from UNIX socket (%s)", scanner_options), | |
1166 | sock); | |
1167 | ||
1168 | /* infected ? */ | |
1169 | if (av_buffer[0] == '1') { | |
1170 | uschar * s = Ustrchr(av_buffer, '\n'); | |
1171 | if (s) | |
1172 | *s = '\0'; | |
1173 | malware_name = string_copy(&av_buffer[2]); | |
1174 | } | |
1175 | else if (!strncmp(CS av_buffer, "-1", 2)) | |
1176 | return m_errlog_defer_3(scanent, US"scanner reported error", sock); | |
1177 | else /* all ok, no virus */ | |
1178 | malware_name = NULL; | |
599dcb77 | 1179 | |
0f0c8159 | 1180 | break; |
8544e77a | 1181 | } |
8e669ac1 | 1182 | |
b1f8e4f8 JH |
1183 | case M_CLAMD: /* "clamd" scanner type ----------------------------------- */ |
1184 | { | |
0f0c8159 JH |
1185 | /* This code was originally contributed by David Saez */ |
1186 | /* There are three scanning methods available to us: | |
1187 | * (1) Use the SCAN command, pointing to a file in the filesystem | |
1188 | * (2) Use the STREAM command, send the data on a separate port | |
1189 | * (3) Use the zINSTREAM command, send the data inline | |
1190 | * The zINSTREAM command was introduced with ClamAV 0.95, which marked | |
1191 | * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095 | |
1192 | * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that | |
1193 | * the TCP-connected daemon is actually local; otherwise we use zINSTREAM unless | |
1194 | * WITH_OLD_CLAMAV_STREAM is defined. | |
1195 | * See Exim bug 926 for details. */ | |
1196 | ||
1197 | uschar *p, *vname, *result_tag, *response_end; | |
1198 | int bread=0; | |
1199 | uschar * file_name; | |
1200 | uschar av_buffer[1024]; | |
1201 | uschar *hostname = US""; | |
1202 | host_item connhost; | |
1203 | uschar *clamav_fbuf; | |
1204 | int clam_fd, result; | |
1205 | off_t fsize; | |
1206 | unsigned int fsize_uint; | |
1207 | BOOL use_scan_command = FALSE; | |
1208 | clamd_address_container * clamd_address_vector[MAX_CLAMD_SERVERS]; | |
0f0c8159 JH |
1209 | int num_servers = 0; |
1210 | #ifdef WITH_OLD_CLAMAV_STREAM | |
1211 | unsigned int port; | |
1212 | uschar av_buffer2[1024]; | |
1213 | int sockData; | |
1214 | #else | |
1215 | uint32_t send_size, send_final_zeroblock; | |
1216 | #endif | |
1217 | ||
1218 | if (*scanner_options == '/') | |
1219 | /* Local file; so we def want to use_scan_command and don't want to try | |
1220 | * passing IP/port combinations */ | |
1221 | use_scan_command = TRUE; | |
1222 | else | |
1223 | { | |
1224 | const uschar *address = scanner_options; | |
1225 | uschar address_buffer[MAX_CLAMD_ADDRESS_LENGTH + 20]; | |
1226 | ||
1227 | /* Go through the rest of the list of host/port and construct an array | |
1228 | * of servers to try. The first one is the bit we just passed from | |
1229 | * scanner_options so process that first and then scan the remainder of | |
1230 | * the address buffer */ | |
1231 | do | |
4e71661f | 1232 | { |
0f0c8159 | 1233 | clamd_address_container *this_clamd; |
b1f8e4f8 | 1234 | |
0f0c8159 JH |
1235 | /* The 'local' option means use the SCAN command over the network |
1236 | * socket (ie common file storage in use) */ | |
1237 | if (strcmpic(address,US"local") == 0) | |
1238 | { | |
1239 | use_scan_command = TRUE; | |
1240 | continue; | |
1241 | } | |
b1f8e4f8 | 1242 | |
0f0c8159 JH |
1243 | /* XXX: If unsuccessful we should free this memory */ |
1244 | this_clamd = | |
1245 | (clamd_address_container *)store_get(sizeof(clamd_address_container)); | |
b1f8e4f8 | 1246 | |
0f0c8159 JH |
1247 | /* extract host and port part */ |
1248 | if( sscanf(CS address, "%" MAX_CLAMD_ADDRESS_LENGTH_S "s %u", | |
1249 | this_clamd->tcp_addr, &(this_clamd->tcp_port)) != 2 ) | |
1250 | { | |
1251 | (void) m_errlog_defer(scanent, | |
1252 | string_sprintf("invalid address '%s'", address)); | |
1253 | continue; | |
1254 | } | |
b1f8e4f8 | 1255 | |
0f0c8159 JH |
1256 | clamd_address_vector[num_servers] = this_clamd; |
1257 | num_servers++; | |
1258 | if (num_servers >= MAX_CLAMD_SERVERS) | |
1259 | { | |
1260 | (void) m_errlog_defer(scanent, | |
1261 | US"More than " MAX_CLAMD_SERVERS_S " clamd servers " | |
1262 | "specified; only using the first " MAX_CLAMD_SERVERS_S ); | |
1263 | break; | |
1264 | } | |
1265 | } while ((address = string_nextinlist(&av_scanner_work, &sep, | |
1266 | address_buffer, | |
1267 | sizeof(address_buffer))) != NULL); | |
8e669ac1 | 1268 | |
0f0c8159 JH |
1269 | /* check if we have at least one server */ |
1270 | if (!num_servers) | |
b1f8e4f8 | 1271 | return m_errlog_defer(scanent, |
0f0c8159 JH |
1272 | US"no useable server addresses in malware configuration option."); |
1273 | } | |
b1f8e4f8 | 1274 | |
0f0c8159 JH |
1275 | /* See the discussion of response formats below to see why we really |
1276 | don't like colons in filenames when passing filenames to ClamAV. */ | |
1277 | if (use_scan_command && Ustrchr(eml_filename, ':')) | |
1278 | return m_errlog_defer(scanent, | |
1279 | string_sprintf("local/SCAN mode incompatible with" \ | |
1280 | " : in path to email filename [%s]", eml_filename)); | |
b1f8e4f8 | 1281 | |
0f0c8159 JH |
1282 | /* We have some network servers specified */ |
1283 | if (num_servers) | |
1284 | { | |
1285 | /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd | |
1286 | * only supports AF_INET, but we should probably be looking to the | |
1287 | * future and rewriting this to be protocol-independent anyway. */ | |
b1f8e4f8 | 1288 | |
0f0c8159 JH |
1289 | while (num_servers > 0) |
1290 | { | |
1291 | int i; | |
23763898 | 1292 | int current_server = random_number( num_servers ); |
b1f8e4f8 | 1293 | |
0f0c8159 JH |
1294 | DEBUG(D_acl) |
1295 | debug_printf("trying server name %s, port %u\n", | |
1296 | clamd_address_vector[current_server]->tcp_addr, | |
1297 | clamd_address_vector[current_server]->tcp_port); | |
1298 | ||
1299 | /* Lookup the host. This is to ensure that we connect to the same IP | |
1300 | * on both connections (as one host could resolve to multiple ips) */ | |
1301 | sock= m_tcpsocket(clamd_address_vector[current_server]->tcp_addr, | |
1302 | clamd_address_vector[current_server]->tcp_port, | |
1303 | &connhost, &errstr); | |
1304 | if (sock >= 0) | |
1305 | { | |
1306 | /* Connection successfully established with a server */ | |
1307 | hostname = clamd_address_vector[current_server]->tcp_addr; | |
1308 | break; | |
4e71661f | 1309 | } |
b1f8e4f8 | 1310 | |
70817078 JH |
1311 | log_write(0, LOG_MAIN, "malware acl condition: %s: %s", |
1312 | scanent->name, errstr); | |
0f0c8159 JH |
1313 | |
1314 | /* Remove the server from the list. XXX We should free the memory */ | |
1315 | num_servers--; | |
1316 | for (i = current_server; i < num_servers; i++) | |
1317 | clamd_address_vector[i] = clamd_address_vector[i+1]; | |
4e71661f | 1318 | } |
8e669ac1 | 1319 | |
0f0c8159 JH |
1320 | if (num_servers == 0) |
1321 | return m_errlog_defer(scanent, US"all servers failed"); | |
1322 | } | |
1323 | else | |
1324 | { | |
3e60dd41 | 1325 | if ((sock = ip_unixsocket(scanner_options, &errstr)) < 0) |
0f0c8159 JH |
1326 | return m_errlog_defer(scanent, errstr); |
1327 | } | |
b1f8e4f8 | 1328 | |
0f0c8159 JH |
1329 | /* have socket in variable "sock"; command to use is semi-independent of |
1330 | * the socket protocol. We use SCAN if is local (either Unix/local | |
1331 | * domain socket, or explicitly told local) else we stream the data. | |
1332 | * How we stream the data depends upon how we were built. */ | |
1333 | ||
1334 | if (!use_scan_command) | |
1335 | { | |
4e71661f | 1336 | #ifdef WITH_OLD_CLAMAV_STREAM |
0f0c8159 JH |
1337 | /* "STREAM\n" command, get back a "PORT <N>\n" response, send data to |
1338 | * that port on a second connection; then in the scan-method-neutral | |
1339 | * part, read the response back on the original connection. */ | |
b1f8e4f8 | 1340 | |
0f0c8159 JH |
1341 | DEBUG(D_acl) debug_printf( |
1342 | "Malware scan: issuing %s old-style remote scan (PORT)\n", | |
1343 | scanner_name); | |
b1f8e4f8 | 1344 | |
0f0c8159 JH |
1345 | /* Pass the string to ClamAV (7 = "STREAM\n") */ |
1346 | if (m_sock_send(sock, US"STREAM\n", 7, &errstr) < 0) | |
1347 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 1348 | |
0f0c8159 JH |
1349 | memset(av_buffer2, 0, sizeof(av_buffer2)); |
1350 | bread = ip_recv(sock, av_buffer2, sizeof(av_buffer2), tmo-time(NULL)); | |
b1f8e4f8 | 1351 | |
0f0c8159 JH |
1352 | if (bread < 0) |
1353 | return m_errlog_defer_3(scanent, | |
1354 | string_sprintf("unable to read PORT from socket (%s)", | |
1355 | strerror(errno)), | |
1356 | sock); | |
b1f8e4f8 | 1357 | |
0f0c8159 JH |
1358 | if (bread == sizeof(av_buffer2)) |
1359 | return m_errlog_defer_3(scanent, "buffer too small", sock); | |
b1f8e4f8 | 1360 | |
0f0c8159 JH |
1361 | if (!(*av_buffer2)) |
1362 | return m_errlog_defer_3(scanent, "ClamAV returned null", sock); | |
b1f8e4f8 | 1363 | |
0f0c8159 JH |
1364 | av_buffer2[bread] = '\0'; |
1365 | if( sscanf(CS av_buffer2, "PORT %u\n", &port) != 1 ) | |
1366 | return m_errlog_defer_3(scanent, | |
1367 | string_sprintf("Expected port information from clamd, got '%s'", | |
1368 | av_buffer2), | |
1369 | sock); | |
b1f8e4f8 | 1370 | |
0f0c8159 JH |
1371 | sockData = m_tcpsocket(connhost.address, port, NULL, &errstr); |
1372 | if (sockData < 0) | |
1373 | return m_errlog_defer_3(scanent, errstr, sock); | |
b1f8e4f8 | 1374 | |
4e71661f JH |
1375 | # define CLOSE_SOCKDATA (void)close(sockData) |
1376 | #else /* WITH_OLD_CLAMAV_STREAM not defined */ | |
0f0c8159 JH |
1377 | /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data> |
1378 | chunks, <n> a 4-byte number (network order), terminated by a zero-length | |
1379 | chunk. */ | |
b1f8e4f8 | 1380 | |
0f0c8159 JH |
1381 | DEBUG(D_acl) debug_printf( |
1382 | "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n", | |
1383 | scanner_name); | |
b1f8e4f8 | 1384 | |
0f0c8159 JH |
1385 | /* Pass the string to ClamAV (10 = "zINSTREAM\0") */ |
1386 | if (send(sock, "zINSTREAM", 10, 0) < 0) | |
1387 | return m_errlog_defer_3(scanent, | |
1388 | string_sprintf("unable to send zINSTREAM to socket (%s)", | |
1389 | strerror(errno)), | |
1390 | sock); | |
b1f8e4f8 | 1391 | |
4e71661f JH |
1392 | # define CLOSE_SOCKDATA /**/ |
1393 | #endif | |
b1f8e4f8 | 1394 | |
0f0c8159 JH |
1395 | /* calc file size */ |
1396 | if ((clam_fd = open(CS eml_filename, O_RDONLY)) < 0) | |
1397 | { | |
1398 | int err = errno; | |
1399 | CLOSE_SOCKDATA; | |
1400 | return m_errlog_defer_3(scanent, | |
1401 | string_sprintf("can't open spool file %s: %s", | |
1402 | eml_filename, strerror(err)), | |
1403 | sock); | |
1404 | } | |
1405 | if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0) | |
1406 | { | |
1407 | int err = errno; | |
1408 | CLOSE_SOCKDATA; (void)close(clam_fd); | |
1409 | return m_errlog_defer_3(scanent, | |
1410 | string_sprintf("can't seek spool file %s: %s", | |
1411 | eml_filename, strerror(err)), | |
1412 | sock); | |
1413 | } | |
1414 | fsize_uint = (unsigned int) fsize; | |
1415 | if ((off_t)fsize_uint != fsize) | |
1416 | { | |
1417 | CLOSE_SOCKDATA; (void)close(clam_fd); | |
1418 | return m_errlog_defer_3(scanent, | |
1419 | string_sprintf("seeking spool file %s, size overflow", | |
1420 | eml_filename), | |
1421 | sock); | |
1422 | } | |
1423 | lseek(clam_fd, 0, SEEK_SET); | |
b1f8e4f8 | 1424 | |
0f0c8159 JH |
1425 | if (!(clamav_fbuf = (uschar *) malloc (fsize_uint))) |
1426 | { | |
1427 | CLOSE_SOCKDATA; (void)close(clam_fd); | |
1428 | return m_errlog_defer_3(scanent, | |
1429 | string_sprintf("unable to allocate memory %u for file (%s)", | |
1430 | fsize_uint, eml_filename), | |
1431 | sock); | |
1432 | } | |
b1f8e4f8 | 1433 | |
0f0c8159 JH |
1434 | if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0) |
1435 | { | |
1436 | int err = errno; | |
1437 | free(clamav_fbuf); CLOSE_SOCKDATA; (void)close(clam_fd); | |
1438 | return m_errlog_defer_3(scanent, | |
1439 | string_sprintf("can't read spool file %s: %s", | |
1440 | eml_filename, strerror(err)), | |
1441 | sock); | |
1442 | } | |
1443 | (void)close(clam_fd); | |
b1f8e4f8 | 1444 | |
0f0c8159 | 1445 | /* send file body to socket */ |
4e71661f | 1446 | #ifdef WITH_OLD_CLAMAV_STREAM |
0f0c8159 JH |
1447 | if (send(sockData, clamav_fbuf, fsize_uint, 0) < 0) |
1448 | { | |
1449 | free(clamav_fbuf); CLOSE_SOCKDATA; | |
1450 | return m_errlog_defer_3(scanent, | |
1451 | string_sprintf("unable to send file body to socket (%s:%u)", | |
1452 | hostname, port), | |
1453 | sock); | |
1454 | } | |
4e71661f | 1455 | #else |
0f0c8159 JH |
1456 | send_size = htonl(fsize_uint); |
1457 | send_final_zeroblock = 0; | |
1458 | if ((send(sock, &send_size, sizeof(send_size), 0) < 0) || | |
1459 | (send(sock, clamav_fbuf, fsize_uint, 0) < 0) || | |
1460 | (send(sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0)) | |
1461 | { | |
b1f8e4f8 | 1462 | free(clamav_fbuf); |
0f0c8159 JH |
1463 | return m_errlog_defer_3(scanent, |
1464 | string_sprintf("unable to send file body to socket (%s)", hostname), | |
1465 | sock); | |
4e71661f | 1466 | } |
0f0c8159 | 1467 | #endif |
b1f8e4f8 | 1468 | |
0f0c8159 | 1469 | free(clamav_fbuf); |
b1f8e4f8 | 1470 | |
0f0c8159 JH |
1471 | CLOSE_SOCKDATA; |
1472 | #undef CLOSE_SOCKDATA | |
1473 | } | |
1474 | else | |
1475 | { /* use scan command */ | |
1476 | /* Send a SCAN command pointing to a filename; then in the then in the | |
1477 | * scan-method-neutral part, read the response back */ | |
1478 | ||
1479 | /* ================================================================= */ | |
1480 | ||
1481 | /* Prior to the reworking post-Exim-4.72, this scanned a directory, | |
1482 | which dates to when ClamAV needed us to break apart the email into the | |
1483 | MIME parts (eg, with the now deprecated demime condition coming first). | |
1484 | Some time back, ClamAV gained the ability to deconstruct the emails, so | |
1485 | doing this would actually have resulted in the mail attachments being | |
1486 | scanned twice, in the broken out files and from the original .eml. | |
1487 | Since ClamAV now handles emails (and has for quite some time) we can | |
1488 | just use the email file itself. */ | |
1489 | /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */ | |
1490 | file_name = string_sprintf("SCAN %s\n", eml_filename); | |
1491 | ||
1492 | DEBUG(D_acl) debug_printf( | |
1493 | "Malware scan: issuing %s local-path scan [%s]\n", | |
1494 | scanner_name, scanner_options); | |
b1f8e4f8 | 1495 | |
0f0c8159 JH |
1496 | if (send(sock, file_name, Ustrlen(file_name), 0) < 0) |
1497 | return m_errlog_defer_3(scanent, | |
1498 | string_sprintf("unable to write to socket (%s)", strerror(errno)), | |
1499 | sock); | |
b1f8e4f8 | 1500 | |
0f0c8159 JH |
1501 | /* Do not shut down the socket for writing; a user report noted that |
1502 | * clamd 0.70 does not react well to this. */ | |
1503 | } | |
1504 | /* Commands have been sent, no matter which scan method or connection | |
1505 | * type we're using; now just read the result, independent of method. */ | |
1506 | ||
1507 | /* Read the result */ | |
1508 | memset(av_buffer, 0, sizeof(av_buffer)); | |
1509 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); | |
1510 | (void)close(sock); | |
1511 | sock = -1; | |
1512 | ||
1513 | if (bread <= 0) | |
1514 | return m_errlog_defer(scanent, | |
1515 | string_sprintf("unable to read from socket (%s)", | |
1516 | errno == 0 ? "EOF" : strerror(errno))); | |
1517 | ||
1518 | if (bread == sizeof(av_buffer)) | |
1519 | return m_errlog_defer(scanent, US"buffer too small"); | |
1520 | /* We're now assured of a NULL at the end of av_buffer */ | |
1521 | ||
1522 | /* Check the result. ClamAV returns one of two result formats. | |
1523 | In the basic mode, the response is of the form: | |
1524 | infected: -> "<filename>: <virusname> FOUND" | |
1525 | not-infected: -> "<filename>: OK" | |
1526 | error: -> "<filename>: <errcode> ERROR | |
1527 | If the ExtendedDetectionInfo option has been turned on, then we get: | |
1528 | "<filename>: <virusname>(<virushash>:<virussize>) FOUND" | |
1529 | for the infected case. Compare: | |
1530 | /tmp/eicar.com: Eicar-Test-Signature FOUND | |
1531 | /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND | |
1532 | ||
1533 | In the streaming case, clamd uses the filename "stream" which you should | |
1534 | be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The | |
1535 | client app will replace "stream" with the original filename before returning | |
1536 | results to stdout, but the trace shows the data). | |
1537 | ||
1538 | We will assume that the pathname passed to clamd from Exim does not contain | |
1539 | a colon. We will have whined loudly above if the eml_filename does (and we're | |
1540 | passing a filename to clamd). */ | |
1541 | ||
1542 | if (!(*av_buffer)) | |
1543 | return m_errlog_defer(scanent, US"ClamAV returned null"); | |
1544 | ||
1545 | /* strip newline at the end (won't be present for zINSTREAM) | |
1546 | (also any trailing whitespace, which shouldn't exist, but we depend upon | |
1547 | this below, so double-check) */ | |
1548 | p = av_buffer + Ustrlen(av_buffer) - 1; | |
1549 | if (*p == '\n') *p = '\0'; | |
1550 | ||
1551 | DEBUG(D_acl) debug_printf("Malware response: %s\n", av_buffer); | |
1552 | ||
1553 | while (isspace(*--p) && (p > av_buffer)) | |
1554 | *p = '\0'; | |
1555 | if (*p) ++p; | |
1556 | response_end = p; | |
1557 | ||
1558 | /* colon in returned output? */ | |
1559 | if((p = Ustrchr(av_buffer,':')) == NULL) | |
1560 | return m_errlog_defer(scanent, string_sprintf( | |
1561 | "ClamAV returned malformed result (missing colon): %s", | |
1562 | av_buffer)); | |
1563 | ||
1564 | /* strip filename */ | |
1565 | while (*p && isspace(*++p)) /**/; | |
1566 | vname = p; | |
1567 | ||
1568 | /* It would be bad to encounter a virus with "FOUND" in part of the name, | |
1569 | but we should at least be resistant to it. */ | |
1570 | p = Ustrrchr(vname, ' '); | |
1571 | result_tag = p ? p+1 : vname; | |
1572 | ||
1573 | if (Ustrcmp(result_tag, "FOUND") == 0) | |
1574 | { | |
1575 | /* p should still be the whitespace before the result_tag */ | |
1576 | while (isspace(*p)) --p; | |
1577 | *++p = '\0'; | |
1578 | /* Strip off the extended information too, which will be in parens | |
1579 | after the virus name, with no intervening whitespace. */ | |
1580 | if (*--p == ')') | |
4e71661f | 1581 | { |
0f0c8159 JH |
1582 | /* "(hash:size)", so previous '(' will do; if not found, we have |
1583 | a curious virus name, but not an error. */ | |
1584 | p = Ustrrchr(vname, '('); | |
1585 | if (p) | |
1586 | *p = '\0'; | |
4e71661f | 1587 | } |
0f0c8159 JH |
1588 | malware_name = string_copy(vname); |
1589 | DEBUG(D_acl) debug_printf("Malware found, name \"%s\"\n", malware_name); | |
b1f8e4f8 | 1590 | |
0f0c8159 JH |
1591 | } |
1592 | else if (Ustrcmp(result_tag, "ERROR") == 0) | |
1593 | return m_errlog_defer(scanent, | |
1594 | string_sprintf("ClamAV returned: %s", av_buffer)); | |
b1f8e4f8 | 1595 | |
0f0c8159 JH |
1596 | else if (Ustrcmp(result_tag, "OK") == 0) |
1597 | { | |
1598 | /* Everything should be OK */ | |
1599 | malware_name = NULL; | |
1600 | DEBUG(D_acl) debug_printf("Malware not found\n"); | |
b1f8e4f8 | 1601 | |
0f0c8159 JH |
1602 | } |
1603 | else | |
1604 | return m_errlog_defer(scanent, | |
1605 | string_sprintf("unparseable response from ClamAV: {%s}", av_buffer)); | |
1606 | ||
1607 | break; | |
b1f8e4f8 JH |
1608 | } /* clamd */ |
1609 | ||
1610 | case M_SOCK: /* "sock" scanner type ------------------------------------- */ | |
0f0c8159 JH |
1611 | /* This code was derived by Martin Poole from the clamd code contributed |
1612 | by David Saez and the cmdline code | |
1613 | */ | |
b1f8e4f8 | 1614 | { |
0f0c8159 JH |
1615 | int bread; |
1616 | uschar * commandline; | |
1617 | uschar av_buffer[1024]; | |
1618 | uschar * linebuffer; | |
1619 | uschar * sockline_scanner; | |
1620 | uschar sockline_scanner_default[] = "%s\n"; | |
1621 | const pcre *sockline_trig_re; | |
1622 | const pcre *sockline_name_re; | |
1623 | ||
1624 | /* find scanner command line */ | |
1625 | if ((sockline_scanner = string_nextinlist(&av_scanner_work, &sep, | |
1626 | NULL, 0))) | |
1627 | { /* check for no expansions apart from one %s */ | |
1628 | uschar * s = Ustrchr(sockline_scanner, '%'); | |
1629 | if (s++) | |
1630 | if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%')) | |
1631 | return m_errlog_defer_3(scanent, | |
1632 | US"unsafe sock scanner call spec", sock); | |
1633 | } | |
1634 | else | |
1635 | sockline_scanner = sockline_scanner_default; | |
b1f8e4f8 | 1636 | |
0f0c8159 JH |
1637 | /* find scanner output trigger */ |
1638 | sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1639 | "missing trigger specification", &errstr); | |
1640 | if (!sockline_trig_re) | |
1641 | return m_errlog_defer_3(scanent, errstr, sock); | |
b1f8e4f8 | 1642 | |
0f0c8159 JH |
1643 | /* find virus name regex */ |
1644 | sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep, | |
1645 | "missing virus name regex specification", &errstr); | |
1646 | if (!sockline_name_re) | |
1647 | return m_errlog_defer_3(scanent, errstr, sock); | |
b1f8e4f8 | 1648 | |
0f0c8159 JH |
1649 | /* prepare scanner call - security depends on expansions check above */ |
1650 | commandline = string_sprintf("%s/scan/%s/%s.eml", spool_directory, message_id, message_id); | |
1651 | commandline = string_sprintf( CS sockline_scanner, CS commandline); | |
b1f8e4f8 JH |
1652 | |
1653 | ||
0f0c8159 JH |
1654 | /* Pass the command string to the socket */ |
1655 | if (m_sock_send(sock, commandline, Ustrlen(commandline), &errstr) < 0) | |
1656 | return m_errlog_defer(scanent, errstr); | |
b1f8e4f8 | 1657 | |
0f0c8159 JH |
1658 | /* Read the result */ |
1659 | bread = ip_recv(sock, av_buffer, sizeof(av_buffer), tmo-time(NULL)); | |
b1f8e4f8 | 1660 | |
0f0c8159 JH |
1661 | if (bread <= 0) |
1662 | return m_errlog_defer_3(scanent, | |
1663 | string_sprintf("unable to read from socket (%s)", strerror(errno)), | |
1664 | sock); | |
b1f8e4f8 | 1665 | |
0f0c8159 JH |
1666 | if (bread == sizeof(av_buffer)) |
1667 | return m_errlog_defer_3(scanent, US"buffer too small", sock); | |
1668 | av_buffer[bread] = '\0'; | |
1669 | linebuffer = string_copy(av_buffer); | |
b1f8e4f8 | 1670 | |
0f0c8159 JH |
1671 | /* try trigger match */ |
1672 | if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1)) | |
1673 | { | |
1674 | if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer))) | |
1675 | malware_name = US "unknown"; | |
b1f8e4f8 | 1676 | } |
0f0c8159 JH |
1677 | else /* no virus found */ |
1678 | malware_name = NULL; | |
1679 | break; | |
8523533c | 1680 | } |
8e669ac1 | 1681 | |
b1f8e4f8 JH |
1682 | case M_MKSD: /* "mksd" scanner type ------------------------------------- */ |
1683 | { | |
0f0c8159 JH |
1684 | char *mksd_options_end; |
1685 | int mksd_maxproc = 1; /* default, if no option supplied */ | |
1686 | int retval; | |
b1f8e4f8 | 1687 | |
0f0c8159 JH |
1688 | if (scanner_options) |
1689 | { | |
1690 | mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10); | |
1691 | if ( *scanner_options == '\0' | |
1692 | || *mksd_options_end != '\0' | |
1693 | || mksd_maxproc < 1 | |
1694 | || mksd_maxproc > 32 | |
1695 | ) | |
1696 | return m_errlog_defer(scanent, | |
1697 | string_sprintf("invalid option '%s'", scanner_options)); | |
1698 | } | |
8e669ac1 | 1699 | |
3e60dd41 | 1700 | if((sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0) |
0f0c8159 | 1701 | return m_errlog_defer(scanent, errstr); |
8e669ac1 | 1702 | |
0f0c8159 | 1703 | malware_name = NULL; |
94a18f28 | 1704 | |
0f0c8159 | 1705 | DEBUG(D_acl) debug_printf("Malware scan: issuing %s scan\n", scanner_name); |
94a18f28 | 1706 | |
0f0c8159 JH |
1707 | if ((retval = mksd_scan_packed(scanent, sock, eml_filename, tmo)) != OK) |
1708 | { | |
1709 | close (sock); | |
1710 | return retval; | |
1711 | } | |
1712 | break; | |
8523533c | 1713 | } |
0f0c8159 | 1714 | |
b6fbf22d JH |
1715 | case M_AVAST: /* "avast" scanner type ----------------------------------- */ |
1716 | { | |
1717 | int ovector[1*3]; | |
1718 | uschar buf[1024]; | |
1719 | uschar * scanrequest; | |
b6fbf22d | 1720 | enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage; |
0f0c8159 | 1721 | int nread; |
b6fbf22d JH |
1722 | |
1723 | /* According to Martin Tuma @avast the protocol uses "escaped | |
1724 | whitespace", that is, every embedded whitespace is backslash | |
1725 | escaped, as well as backslash is protected by backslash. | |
1726 | The returned lines contain the name of the scanned file, a tab | |
1727 | and the [ ] marker. | |
1728 | [+] - not infected | |
1729 | [L] - infected | |
1730 | [E] - some error occured | |
1731 | Such marker follows the first non-escaped TAB. */ | |
476be7e2 JH |
1732 | if ( ( !ava_re_clean |
1733 | && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr))) | |
1734 | || ( !ava_re_virus | |
1735 | && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr))) | |
b6fbf22d JH |
1736 | ) |
1737 | return malware_errlog_defer(errstr); | |
1738 | ||
1739 | /* wait for result */ | |
0f0c8159 JH |
1740 | for (avast_stage = AVA_HELO; |
1741 | (nread = recv_line(sock, buf, sizeof(buf), tmo)) > 0; | |
1742 | ) | |
b6fbf22d JH |
1743 | { |
1744 | int slen = Ustrlen(buf); | |
1745 | if (slen >= 1) | |
1746 | { | |
1747 | DEBUG(D_acl) debug_printf("got from avast: %s\n", buf); | |
1748 | switch (avast_stage) | |
1749 | { | |
1750 | case AVA_HELO: | |
1751 | if (Ustrncmp(buf, "220", 3) != 0) | |
1752 | goto endloop; /* require a 220 */ | |
1753 | goto sendreq; | |
1754 | ||
1755 | case AVA_OPT: | |
1756 | if (Ustrncmp(buf, "210", 3) == 0) | |
1757 | break; /* ignore 210 responses */ | |
1758 | if (Ustrncmp(buf, "200", 3) != 0) | |
1759 | goto endloop; /* require a 200 */ | |
1760 | ||
1761 | sendreq: | |
1762 | { | |
1763 | int len; | |
1764 | /* Check for another option to send. Newline-terminate it. */ | |
1765 | if ((scanrequest = string_nextinlist(&av_scanner_work, &sep, | |
1766 | NULL, 0))) | |
1767 | { | |
1768 | scanrequest = string_sprintf("%s\n", scanrequest); | |
1769 | avast_stage = AVA_OPT; /* just sent option */ | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | scanrequest = string_sprintf("SCAN %s/scan/%s\n", | |
1774 | spool_directory, message_id); | |
1775 | avast_stage = AVA_RSP; /* just sent command */ | |
1776 | } | |
1777 | ||
1778 | /* send config-cmd or scan-request to socket */ | |
1779 | len = Ustrlen(scanrequest); | |
1780 | if (send(sock, scanrequest, len, 0) < 0) | |
1781 | { | |
1782 | scanrequest[len-1] = '\0'; | |
1783 | return m_errlog_defer_3(scanent, string_sprintf( | |
1784 | "unable to send request '%s' to socket (%s): %s", | |
1785 | scanrequest, scanner_options, strerror(errno)), sock); | |
1786 | } | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | case AVA_RSP: | |
1791 | if (Ustrncmp(buf, "210", 3) == 0) | |
1792 | break; /* ignore the "210 SCAN DATA" message */ | |
1793 | ||
476be7e2 | 1794 | if (pcre_exec(ava_re_clean, NULL, CS buf, slen, |
b6fbf22d JH |
1795 | 0, 0, ovector, nelements(ovector)) > 0) |
1796 | break; | |
1797 | ||
476be7e2 | 1798 | if ((malware_name = m_pcre_exec(ava_re_virus, buf))) |
b6fbf22d JH |
1799 | { /* remove backslash in front of [whitespace|backslash] */ |
1800 | uschar * p, * p0; | |
1801 | for (p = malware_name; *p; ++p) | |
1802 | if (*p == '\\' && (isspace(p[1]) || p[1] == '\\')) | |
1803 | for (p0 = p; *p0; ++p0) *p0 = p0[1]; | |
1804 | ||
1805 | avast_stage = AVA_DONE; | |
1806 | goto endloop; | |
1807 | } | |
1808 | ||
1809 | if (Ustrncmp(buf, "200 SCAN OK", 11) == 0) | |
1810 | { /* we're done finally */ | |
1811 | if (send(sock, "QUIT\n", 5, 0) < 0) /* courtesy */ | |
1812 | return m_errlog_defer_3(scanent, string_sprintf( | |
1813 | "unable to send quit request to socket (%s): %s", | |
1814 | scanner_options, strerror(errno)), | |
1815 | sock); | |
1816 | malware_name = NULL; | |
1817 | avast_stage = AVA_DONE; | |
1818 | goto endloop; | |
1819 | } | |
1820 | ||
1821 | /* here for any unexpected response from the scanner */ | |
1822 | goto endloop; | |
1823 | } | |
0f0c8159 | 1824 | } |
b6fbf22d | 1825 | } |
b6fbf22d JH |
1826 | endloop: |
1827 | ||
1828 | switch(avast_stage) | |
1829 | { | |
0f0c8159 | 1830 | case AVA_HELO: |
b6fbf22d | 1831 | case AVA_OPT: |
0f0c8159 JH |
1832 | case AVA_RSP: return m_errlog_defer_3(scanent, |
1833 | nread >= 0 | |
1834 | ? string_sprintf( | |
1835 | "invalid response from scanner: '%s'", buf) | |
1836 | : nread == -1 | |
1837 | ? US"EOF from scanner" | |
1838 | : US"timeout from scanner", | |
1839 | sock); | |
b6fbf22d JH |
1840 | default: break; |
1841 | } | |
1842 | } | |
0f0c8159 JH |
1843 | break; |
1844 | } /* scanner type switch */ | |
8523533c | 1845 | |
0f0c8159 JH |
1846 | if (sock >= 0) |
1847 | (void) close (sock); | |
1848 | malware_ok = TRUE; /* set "been here, done that" marker */ | |
b1f8e4f8 | 1849 | } |
8523533c | 1850 | |
0f0c8159 JH |
1851 | /* match virus name against pattern (caseless ------->----------v) */ |
1852 | if (malware_name && regex_match_and_setup(re, malware_name, 0, -1)) | |
1853 | { | |
1854 | DEBUG(D_acl) debug_printf( | |
1855 | "Matched regex to malware [%s] [%s]\n", malware_re, malware_name); | |
1856 | return OK; | |
1857 | } | |
1858 | else | |
1859 | return FAIL; | |
8523533c TK |
1860 | } |
1861 | ||
1862 | ||
0f0c8159 JH |
1863 | /************************************************* |
1864 | * Scan an email for malware * | |
1865 | *************************************************/ | |
8523533c | 1866 | |
0f0c8159 JH |
1867 | /* This is the normal interface for scanning an email, which doesn't need a |
1868 | filename; it's a wrapper around the malware_file function. | |
8523533c | 1869 | |
0f0c8159 JH |
1870 | Arguments: |
1871 | malware_re match condition for "malware=" | |
1872 | timeout if nonzero, timeout in seconds | |
1873 | ||
1874 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) | |
1875 | where true means malware was found (condition applies) | |
1876 | */ | |
1877 | int | |
1878 | malware(const uschar * malware_re, int timeout) | |
8523533c | 1879 | { |
0f0c8159 JH |
1880 | uschar * scan_filename; |
1881 | int ret; | |
8e669ac1 | 1882 | |
0f0c8159 JH |
1883 | scan_filename = string_sprintf("%s/scan/%s/%s.eml", |
1884 | spool_directory, message_id, message_id); | |
1885 | ret = malware_internal(malware_re, scan_filename, timeout, FALSE); | |
1886 | if (ret == DEFER) av_failed = TRUE; | |
1887 | ||
1888 | return ret; | |
8523533c TK |
1889 | } |
1890 | ||
8e669ac1 | 1891 | |
0f0c8159 JH |
1892 | /************************************************* |
1893 | * Scan a file for malware * | |
1894 | *************************************************/ | |
8e669ac1 | 1895 | |
0f0c8159 JH |
1896 | /* This is a test wrapper for scanning an email, which is not used in |
1897 | normal processing. Scan any file, using the Exim scanning interface. | |
1898 | This function tampers with various global variables so is unsafe to use | |
1899 | in any other context. | |
8e669ac1 | 1900 | |
0f0c8159 JH |
1901 | Arguments: |
1902 | eml_filename a file holding the message to be scanned | |
8523533c | 1903 | |
0f0c8159 JH |
1904 | Returns: Exim message processing code (OK, FAIL, DEFER, ...) |
1905 | where true means malware was found (condition applies) | |
1906 | */ | |
1907 | int | |
1908 | malware_in_file(uschar *eml_filename) | |
8523533c | 1909 | { |
0f0c8159 JH |
1910 | uschar message_id_buf[64]; |
1911 | int ret; | |
8523533c | 1912 | |
0f0c8159 JH |
1913 | /* spool_mbox() assumes various parameters exist, when creating |
1914 | the relevant directory and the email within */ | |
1915 | (void) string_format(message_id_buf, sizeof(message_id_buf), | |
1916 | "dummy-%d", vaguely_random_number(INT_MAX)); | |
1917 | message_id = message_id_buf; | |
1918 | sender_address = US"malware-sender@example.net"; | |
1919 | return_path = US""; | |
1920 | recipients_list = NULL; | |
1921 | receive_add_recipient(US"malware-victim@example.net", -1); | |
1922 | enable_dollar_recipients = TRUE; | |
8e669ac1 | 1923 | |
0f0c8159 | 1924 | ret = malware_internal(US"*", eml_filename, 0, TRUE); |
8544e77a | 1925 | |
0f0c8159 JH |
1926 | Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id)); |
1927 | spool_mbox_ok = 1; | |
1928 | /* don't set no_mbox_unspool; at present, there's no way for it to become | |
1929 | set, but if that changes, then it should apply to these tests too */ | |
1930 | unspool_mbox(); | |
8e669ac1 | 1931 | |
0f0c8159 JH |
1932 | /* silence static analysis tools */ |
1933 | message_id = NULL; | |
8e669ac1 | 1934 | |
0f0c8159 | 1935 | return ret; |
8523533c TK |
1936 | } |
1937 | ||
476be7e2 JH |
1938 | |
1939 | void | |
1940 | malware_init(void) | |
1941 | { | |
1942 | if (!malware_default_re) | |
1943 | malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE); | |
1944 | if (!drweb_re) | |
1945 | drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE); | |
1946 | if (!fsec_re) | |
1947 | fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE); | |
1948 | if (!kav_re_sus) | |
1949 | kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE); | |
1950 | if (!kav_re_inf) | |
1951 | kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE); | |
1952 | if (!ava_re_clean) | |
1953 | ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE); | |
1954 | if (!ava_re_virus) | |
1955 | ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE); | |
1956 | } | |
1957 | ||
b1f8e4f8 JH |
1958 | #endif /*WITH_CONTENT_SCAN*/ |
1959 | /* | |
1960 | * vi: aw ai sw=2 | |
1961 | */ |