projects / exim.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Apply the latest Sieve patches.
[exim.git] / src / src / sieve.c
1 /* $Cambridge: exim/src/src/sieve.c,v 1.14 2005/11/14 11:41:23 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) Michael Haardt 2003-2005 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* This code was contributed by Michael Haardt. */
11
12
13 /* Sieve mail filter. */
14
15 #include <ctype.h>
16 #include <errno.h>
17 #include <limits.h>
18 #include <stdlib.h>
19 #include <string.h>
20
21 #include "exim.h"
22
23 #if HAVE_ICONV
24 #include <iconv.h>
25 #endif
26
27 /* Define this for RFC compliant \r\n end-of-line terminators. */
28 /* Undefine it for UNIX-style \n end-of-line terminators (default). */
29 #undef RFC_EOL
30
31 /* Define this for development of the Sieve extension "notify". */
32 #undef NOTIFY
33
34 /* Define this for the Sieve extension "subaddress". */
35 #define SUBADDRESS
36
37 /* Define this for the Sieve extension "vacation". */
38 #define VACATION
39
40 /* Must be >= 1 */
41 #define VACATION_MIN_DAYS 1
42 /* Must be >= VACATION_MIN_DAYS, must be > 7, should be > 30 */
43 #define VACATION_MAX_DAYS 31
44
45 /* Keep this at 75 to accept only RFC compliant MIME words. */
46 /* Increase it if you want to match headers from buggy MUAs. */
47 #define MIMEWORD_LENGTH 75
48
49 struct Sieve
50 {
51 uschar *filter;
52 const uschar *pc;
53 int line;
54 const uschar *errmsg;
55 int keep;
56 int require_envelope;
57 int require_fileinto;
58 #ifdef NOTIFY
59 int require_notify;
60 #endif
61 #ifdef SUBADDRESS
62 int require_subaddress;
63 #endif
64 #ifdef VACATION
65 int require_vacation;
66 int vacation_ran;
67 #endif
68 uschar *vacation_directory;
69 const uschar *subaddress;
70 const uschar *useraddress;
71 int require_copy;
72 int require_iascii_numeric;
73 };
74
75 enum Comparator { COMP_OCTET, COMP_EN_ASCII_CASEMAP, COMP_ASCII_NUMERIC };
76 enum MatchType { MATCH_IS, MATCH_CONTAINS, MATCH_MATCHES };
77 #ifdef SUBADDRESS
78 enum AddressPart { ADDRPART_USER, ADDRPART_DETAIL, ADDRPART_LOCALPART, ADDRPART_DOMAIN, ADDRPART_ALL };
79 #else
80 enum AddressPart { ADDRPART_LOCALPART, ADDRPART_DOMAIN, ADDRPART_ALL };
81 #endif
82 enum RelOp { LT, LE, EQ, GE, GT, NE };
83
84 struct String
85 {
86 uschar *character;
87 int length;
88 };
89
90 static int parse_test(struct Sieve *filter, int *cond, int exec);
91 static int parse_commands(struct Sieve *filter, int exec, address_item **generated);
92
93 static uschar str_from_c[]="From";
94 static const struct String str_from={ str_from_c, 4 };
95 static uschar str_to_c[]="To";
96 static const struct String str_to={ str_to_c, 2 };
97 static uschar str_cc_c[]="Cc";
98 static const struct String str_cc={ str_cc_c, 2 };
99 static uschar str_bcc_c[]="Bcc";
100 static const struct String str_bcc={ str_bcc_c, 3 };
101 static uschar str_sender_c[]="Sender";
102 static const struct String str_sender={ str_sender_c, 6 };
103 static uschar str_resent_from_c[]="Resent-From";
104 static const struct String str_resent_from={ str_resent_from_c, 11 };
105 static uschar str_resent_to_c[]="Resent-To";
106 static const struct String str_resent_to={ str_resent_to_c, 9 };
107 static uschar str_fileinto_c[]="fileinto";
108 static const struct String str_fileinto={ str_fileinto_c, 8 };
109 static uschar str_envelope_c[]="envelope";
110 static const struct String str_envelope={ str_envelope_c, 8 };
111 #ifdef NOTIFY
112 static uschar str_notify_c[]="notify";
113 static const struct String str_notify={ str_notify_c, 6 };
114 #endif
115 #ifdef SUBADDRESS
116 static uschar str_subaddress_c[]="subaddress";
117 static const struct String str_subaddress={ str_subaddress_c, 10 };
118 #endif
119 #ifdef VACATION
120 static uschar str_vacation_c[]="vacation";
121 static const struct String str_vacation={ str_vacation_c, 8 };
122 static uschar str_subject_c[]="Subject";
123 static const struct String str_subject={ str_subject_c, 7 };
124 #endif
125 static uschar str_copy_c[]="copy";
126 static const struct String str_copy={ str_copy_c, 4 };
127 static uschar str_iascii_casemap_c[]="i;ascii-casemap";
128 static const struct String str_iascii_casemap={ str_iascii_casemap_c, 15 };
129 static uschar str_enascii_casemap_c[]="en;ascii-casemap";
130 static const struct String str_enascii_casemap={ str_enascii_casemap_c, 16 };
131 static uschar str_ioctet_c[]="i;octet";
132 static const struct String str_ioctet={ str_ioctet_c, 7 };
133 static uschar str_iascii_numeric_c[]="i;ascii-numeric";
134 static const struct String str_iascii_numeric={ str_iascii_numeric_c, 15 };
135 static uschar str_comparator_iascii_casemap_c[]="comparator-i;ascii-casemap";
136 static const struct String str_comparator_iascii_casemap={ str_comparator_iascii_casemap_c, 26 };
137 static uschar str_comparator_enascii_casemap_c[]="comparator-en;ascii-casemap";
138 static const struct String str_comparator_enascii_casemap={ str_comparator_enascii_casemap_c, 27 };
139 static uschar str_comparator_ioctet_c[]="comparator-i;octet";
140 static const struct String str_comparator_ioctet={ str_comparator_ioctet_c, 18 };
141 static uschar str_comparator_iascii_numeric_c[]="comparator-i;ascii-numeric";
142 static const struct String str_comparator_iascii_numeric={ str_comparator_iascii_numeric_c, 26 };
143
144
145 /*************************************************
146 * Encode to quoted-printable *
147 *************************************************/
148
149 /*
150 Arguments:
151 src UTF-8 string
152 */
153
154 static struct String *quoted_printable_encode(const struct String *src, struct String *dst)
155 {
156 int pass;
157 const uschar *start,*end;
158 uschar *new = NULL;
159 uschar ch;
160 size_t line;
161
162 for (pass=0; pass<=1; ++pass)
163 {
164 line=0;
165 if (pass==0)
166 dst->length=0;
167 else
168 {
169 dst->character=store_get(dst->length+1); /* plus one for \0 */
170 new=dst->character;
171 }
172 for (start=src->character,end=start+src->length; start<end; ++start)
173 {
174 ch=*start;
175 if (line>=73)
176 {
177 if (pass==0)
178 dst->length+=2;
179 else
180 {
181 *new++='=';
182 *new++='\n';
183 }
184 line=0;
185 }
186 if
187 (
188 (ch>=33 && ch<=60)
189 || (ch>=62 && ch<=126)
190 ||
191 (
192 (ch==9 || ch==32)
193 #ifdef RFC_EOL
194 && start+2<end
195 && (*(start+1)!='\r' || *(start+2)!='\n')
196 #else
197 && start+1<end
198 && *(start+1)!='\n'
199 #endif
200 )
201 )
202 {
203 if (pass==0)
204 ++dst->length;
205 else
206 *new++=*start;
207 ++line;
208 }
209 #ifdef RFC_EOL
210 else if (ch=='\r' && start+1<end && *(start+1)=='\n')
211 {
212 if (pass==0)
213 {
214 ++dst->length;
215 line=0;
216 ++start;
217 }
218 else
219 *new++='\n';
220 line=0;
221 }
222 #else
223 else if (ch=='\n')
224 {
225 if (pass==0)
226 ++dst->length;
227 else
228 *new++=*start;
229 ++line;
230 }
231 #endif
232 else
233 {
234 if (pass==0)
235 dst->length+=3;
236 else
237 {
238 sprintf(CS new,"=%02X",ch);
239 new+=3;
240 }
241 line+=3;
242 }
243 }
244 }
245 *new='\0'; /* not included in length, but nice */
246 return dst;
247 }
248
249
250 /*************************************************
251 * Octet-wise string comparison *
252 *************************************************/
253
254 /*
255 Arguments:
256 needle UTF-8 string to search ...
257 haystack ... inside the haystack
258 match_prefix 1 to compare if needle is a prefix of haystack
259
260 Returns: 0 needle not found in haystack
261 1 needle found
262 */
263
264 static int eq_octet(const struct String *needle,
265 const struct String *haystack, int match_prefix)
266 {
267 size_t nl,hl;
268 const uschar *n,*h;
269
270 nl=needle->length;
271 n=needle->character;
272 hl=haystack->length;
273 h=haystack->character;
274 while (nl>0 && hl>0)
275 {
276 #if !HAVE_ICONV
277 if (*n&0x80) return 0;
278 if (*h&0x80) return 0;
279 #endif
280 if (*n!=*h) return 0;
281 ++n;
282 ++h;
283 --nl;
284 --hl;
285 }
286 return (match_prefix ? nl==0 : nl==0 && hl==0);
287 }
288
289
290 /*************************************************
291 * ASCII case-insensitive string comparison *
292 *************************************************/
293
294 /*
295 Arguments:
296 needle UTF-8 string to search ...
297 haystack ... inside the haystack
298 match_prefix 1 to compare if needle is a prefix of haystack
299
300 Returns: 0 needle not found in haystack
301 1 needle found
302 */
303
304 static int eq_asciicase(const struct String *needle,
305 const struct String *haystack, int match_prefix)
306 {
307 size_t nl,hl;
308 const uschar *n,*h;
309 uschar nc,hc;
310
311 nl=needle->length;
312 n=needle->character;
313 hl=haystack->length;
314 h=haystack->character;
315 while (nl>0 && hl>0)
316 {
317 nc=*n;
318 hc=*h;
319 #if !HAVE_ICONV
320 if (nc&0x80) return 0;
321 if (hc&0x80) return 0;
322 #endif
323 /* tolower depends on the locale and only ASCII case must be insensitive */
324 if ((nc>='A' && nc<='Z' ? nc|0x20 : nc) != (hc>='A' && hc<='Z' ? hc|0x20 : hc)) return 0;
325 ++n;
326 ++h;
327 --nl;
328 --hl;
329 }
330 return (match_prefix ? nl==0 : nl==0 && hl==0);
331 }
332
333
334 /*************************************************
335 * Glob pattern search *
336 *************************************************/
337
338 /*
339 Arguments:
340 needle pattern to search ...
341 haystack ... inside the haystack
342
343 Returns: 0 needle not found in haystack
344 1 needle found
345 -1 pattern error
346 */
347
348 static int eq_glob(const struct String *needle,
349 const struct String *haystack, int ascii_caseless)
350 {
351 const uschar *n,*h,*nend,*hend;
352 int may_advance=0;
353
354 n=needle->character;
355 h=haystack->character;
356 nend=n+needle->length;
357 hend=h+haystack->length;
358 while (n<nend)
359 {
360 if (*n=='*')
361 {
362 ++n;
363 may_advance=1;
364 }
365 else
366 {
367 const uschar *npart,*hpart;
368
369 /* Try to match a non-star part of the needle at the current */
370 /* position in the haystack. */
371 match_part:
372 npart=n;
373 hpart=h;
374 while (npart<nend && *npart!='*') switch (*npart)
375 {
376 case '?':
377 {
378 if (hpart==hend) return 0;
379 /* watch out: Do not match one character, but one UTF8 encoded character */
380 if ((*hpart&0xc0)==0xc0)
381 {
382 ++hpart;
383 while (hpart<hend && ((*hpart&0xc0)==0x80)) ++hpart;
384 }
385 else
386 ++hpart;
387 ++npart;
388 break;
389 }
390 case '\\':
391 {
392 ++npart;
393 if (npart==nend) return -1;
394 /* FALLTHROUGH */
395 }
396 default:
397 {
398 if (hpart==hend) return 0;
399 /* tolower depends on the locale, but we need ASCII */
400 if
401 (
402 #if !HAVE_ICONV
403 (*hpart&0x80) || (*npart&0x80) ||
404 #endif
405 ascii_caseless
406 ? ((*npart>='A' && *npart<='Z' ? *npart|0x20 : *npart) != (*hpart>='A' && *hpart<='Z' ? *hpart|0x20 : *hpart))
407 : *hpart!=*npart
408 )
409 {
410 if (may_advance)
411 /* string match after a star failed, advance and try again */
412 {
413 ++h;
414 goto match_part;
415 }
416 else return 0;
417 }
418 else
419 {
420 ++npart;
421 ++hpart;
422 };
423 }
424 }
425 /* at this point, a part was matched successfully */
426 if (may_advance && npart==nend && hpart<hend)
427 /* needle ends, but haystack does not: if there was a star before, advance and try again */
428 {
429 ++h;
430 goto match_part;
431 }
432 h=hpart;
433 n=npart;
434 may_advance=0;
435 }
436 }
437 return (h==hend ? 1 : may_advance);
438 }
439
440
441 /*************************************************
442 * ASCII numeric comparison *
443 *************************************************/
444
445 /*
446 Arguments:
447 a first numeric string
448 b second numeric string
449 relop relational operator
450
451 Returns: 0 not (a relop b)
452 1 a relop b
453 */
454
455 static int eq_asciinumeric(const struct String *a,
456 const struct String *b, enum RelOp relop)
457 {
458 size_t al,bl;
459 const uschar *as,*aend,*bs,*bend;
460 int cmp;
461
462 as=a->character;
463 aend=a->character+a->length;
464 bs=b->character;
465 bend=b->character+b->length;
466
467 while (*as>='0' && *as<='9' && as<aend) ++as;
468 al=as-a->character;
469 while (*bs>='0' && *bs<='9' && bs<bend) ++bs;
470 bl=bs-b->character;
471
472 if (al && bl==0) cmp=-1;
473 else if (al==0 && bl==0) cmp=0;
474 else if (al==0 && bl) cmp=1;
475 else
476 {
477 cmp=al-bl;
478 if (cmp==0) cmp=memcmp(a->character,b->character,al);
479 }
480 switch (relop)
481 {
482 case LT: return cmp<0;
483 case LE: return cmp<=0;
484 case EQ: return cmp==0;
485 case GE: return cmp>=0;
486 case GT: return cmp>0;
487 case NE: return cmp!=0;
488 }
489 /*NOTREACHED*/
490 return -1;
491 }
492
493
494 /*************************************************
495 * Compare strings *
496 *************************************************/
497
498 /*
499 Arguments:
500 needle UTF-8 pattern or string to search ...
501 haystack ... inside the haystack
502 co comparator to use
503 mt match type to use
504
505 Returns: 0 needle not found in haystack
506 1 needle found
507 -1 comparator does not offer matchtype
508 */
509
510 static int compare(struct Sieve *filter, const struct String *needle, const struct String *haystack,
511 enum Comparator co, enum MatchType mt)
512 {
513 int r=0;
514
515 if ((filter_test != FTEST_NONE && debug_selector != 0) ||
516 (debug_selector & D_filter) != 0)
517 {
518 debug_printf("String comparison (match ");
519 switch (mt)
520 {
521 case MATCH_IS: debug_printf(":is"); break;
522 case MATCH_CONTAINS: debug_printf(":contains"); break;
523 case MATCH_MATCHES: debug_printf(":matches"); break;
524 }
525 debug_printf(", comparison \"");
526 switch (co)
527 {
528 case COMP_OCTET: debug_printf("i;octet"); break;
529 case COMP_EN_ASCII_CASEMAP: debug_printf("en;ascii-casemap"); break;
530 case COMP_ASCII_NUMERIC: debug_printf("i;ascii-numeric"); break;
531 }
532 debug_printf("\"):\n");
533 debug_printf(" Search = %s (%d chars)\n", needle->character,needle->length);
534 debug_printf(" Inside = %s (%d chars)\n", haystack->character,haystack->length);
535 }
536 switch (mt)
537 {
538 case MATCH_IS:
539 {
540 switch (co)
541 {
542 case COMP_OCTET:
543 {
544 if (eq_octet(needle,haystack,0)) r=1;
545 break;
546 }
547 case COMP_EN_ASCII_CASEMAP:
548 {
549 if (eq_asciicase(needle,haystack,0)) r=1;
550 break;
551 }
552 case COMP_ASCII_NUMERIC:
553 {
554 if (!filter->require_iascii_numeric)
555 {
556 filter->errmsg=CUS "missing previous require \"comparator-i;ascii-numeric\";";
557 return -1;
558 }
559 if (eq_asciinumeric(needle,haystack,EQ)) r=1;
560 break;
561 }
562 }
563 break;
564 }
565 case MATCH_CONTAINS:
566 {
567 struct String h;
568
569 switch (co)
570 {
571 case COMP_OCTET:
572 {
573 for (h=*haystack; h.length; ++h.character,--h.length) if (eq_octet(needle,&h,1)) { r=1; break; }
574 break;
575 }
576 case COMP_EN_ASCII_CASEMAP:
577 {
578 for (h=*haystack; h.length; ++h.character,--h.length) if (eq_asciicase(needle,&h,1)) { r=1; break; }
579 break;
580 }
581 default:
582 {
583 filter->errmsg=CUS "comparator does not offer specified matchtype";
584 return -1;
585 }
586 }
587 break;
588 }
589 case MATCH_MATCHES:
590 {
591 switch (co)
592 {
593 case COMP_OCTET:
594 {
595 if ((r=eq_glob(needle,haystack,0))==-1)
596 {
597 filter->errmsg=CUS "syntactically invalid pattern";
598 return -1;
599 }
600 break;
601 }
602 case COMP_EN_ASCII_CASEMAP:
603 {
604 if ((r=eq_glob(needle,haystack,1))==-1)
605 {
606 filter->errmsg=CUS "syntactically invalid pattern";
607 return -1;
608 }
609 break;
610 }
611 default:
612 {
613 filter->errmsg=CUS "comparator does not offer specified matchtype";
614 return -1;
615 }
616 }
617 break;
618 }
619 }
620 if ((filter_test != FTEST_NONE && debug_selector != 0) ||
621 (debug_selector & D_filter) != 0)
622 debug_printf(" Result %s\n",r?"true":"false");
623 return r;
624 }
625
626
627 /*************************************************
628 * Check header field syntax *
629 *************************************************/
630
631 /*
632 RFC 2822, section 3.6.8 says:
633
634 field-name = 1*ftext
635
636 ftext = %d33-57 / ; Any character except
637 %d59-126 ; controls, SP, and
638 ; ":".
639
640 That forbids 8-bit header fields. This implementation accepts them, since
641 all of Exim is 8-bit clean, so it adds %d128-%d255.
642
643 Arguments:
644 header header field to quote for suitable use in Exim expansions
645
646 Returns: 0 string is not a valid header field
647 1 string is a value header field
648 */
649
650 static int is_header(const struct String *header)
651 {
652 size_t l;
653 const uschar *h;
654
655 l=header->length;
656 h=header->character;
657 if (l==0) return 0;
658 while (l)
659 {
660 if (((unsigned char)*h)<33 || ((unsigned char)*h)==':' || ((unsigned char)*h)==127) return 0;
661 else
662 {
663 ++h;
664 --l;
665 }
666 }
667 return 1;
668 }
669
670
671 /*************************************************
672 * Quote special characters string *
673 *************************************************/
674
675 /*
676 Arguments:
677 header header field to quote for suitable use in Exim expansions
678 or as debug output
679
680 Returns: quoted string
681 */
682
683 static const uschar *quote(const struct String *header)
684 {
685 uschar *quoted=NULL;
686 int size=0,ptr=0;
687 size_t l;
688 const uschar *h;
689
690 l=header->length;
691 h=header->character;
692 while (l)
693 {
694 switch (*h)
695 {
696 case '\0':
697 {
698 quoted=string_cat(quoted,&size,&ptr,CUS "\\0",2);
699 break;
700 }
701 case '$':
702 case '{':
703 case '}':
704 {
705 quoted=string_cat(quoted,&size,&ptr,CUS "\\",1);
706 }
707 default:
708 {
709 quoted=string_cat(quoted,&size,&ptr,h,1);
710 }
711 }
712 ++h;
713 --l;
714 }
715 quoted=string_cat(quoted,&size,&ptr,CUS "",1);
716 return quoted;
717 }
718
719
720 /*************************************************
721 * Add address to list of generated addresses *
722 *************************************************/
723
724 /*
725 According to RFC 3028, duplicate delivery to the same address must
726 not happen, so the list is first searched for the address.
727
728 Arguments:
729 generated list of generated addresses
730 addr new address to add
731 file address denotes a file
732
733 Returns: nothing
734 */
735
736 static void add_addr(address_item **generated, uschar *addr, int file, int maxage, int maxmessages, int maxstorage)
737 {
738 address_item *new_addr;
739
740 for (new_addr=*generated; new_addr; new_addr=new_addr->next)
741 {
742 if (Ustrcmp(new_addr->address,addr)==0 && (file ? testflag(new_addr, af_pfr|af_file) : 1))
743 {
744 if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0)
745 {
746 debug_printf("Repeated %s `%s' ignored.\n",file ? "fileinto" : "redirect", addr);
747 }
748 return;
749 }
750 }
751
752 if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0)
753 {
754 debug_printf("%s `%s'\n",file ? "fileinto" : "redirect", addr);
755 }
756 new_addr=deliver_make_addr(addr,TRUE);
757 if (file)
758 {
759 setflag(new_addr, af_pfr|af_file);
760 new_addr->mode = 0;
761 }
762 new_addr->p.errors_address = NULL;
763 new_addr->next = *generated;
764 *generated = new_addr;
765 }
766
767
768 /*************************************************
769 * Return decoded header field *
770 *************************************************/
771
772 /*
773 Arguments:
774 value returned value of the field
775 header name of the header field
776
777 Returns: nothing The expanded string is empty
778 in case there is no such header
779 */
780
781 static void expand_header(struct String *value, const struct String *header)
782 {
783 uschar *s,*r,*t;
784 uschar *errmsg;
785
786 value->length=0;
787 value->character=(uschar*)0;
788
789 t=r=s=expand_string(string_sprintf("$rheader_%s",quote(header)));
790 while (*r==' ') ++r;
791 while (*r)
792 {
793 if (*r=='\n')
794 {
795 ++r;
796 while (*r==' ' || *r=='\t') ++r;
797 if (*r) *t++=' ';
798 }
799 else
800 *t++=*r++;
801 }
802 *t++='\0';
803 value->character=rfc2047_decode(s,TRUE,US"utf-8",'\0',&value->length,&errmsg);
804 }
805
806
807 /*************************************************
808 * Parse remaining hash comment *
809 *************************************************/
810
811 /*
812 Token definition:
813 Comment up to terminating CRLF
814
815 Arguments:
816 filter points to the Sieve filter including its state
817
818 Returns: 1 success
819 -1 syntax error
820 */
821
822 static int parse_hashcomment(struct Sieve *filter)
823 {
824 ++filter->pc;
825 while (*filter->pc)
826 {
827 #ifdef RFC_EOL
828 if (*filter->pc=='\r' && *(filter->pc+1)=='\n')
829 #else
830 if (*filter->pc=='\n')
831 #endif
832 {
833 #ifdef RFC_EOL
834 filter->pc+=2;
835 #else
836 ++filter->pc;
837 #endif
838 ++filter->line;
839 return 1;
840 }
841 else ++filter->pc;
842 }
843 filter->errmsg=CUS "missing end of comment";
844 return -1;
845 }
846
847
848 /*************************************************
849 * Parse remaining C-style comment *
850 *************************************************/
851
852 /*
853 Token definition:
854 Everything up to star slash
855
856 Arguments:
857 filter points to the Sieve filter including its state
858
859 Returns: 1 success
860 -1 syntax error
861 */
862
863 static int parse_comment(struct Sieve *filter)
864 {
865 filter->pc+=2;
866 while (*filter->pc)
867 {
868 if (*filter->pc=='*' && *(filter->pc+1)=='/')
869 {
870 filter->pc+=2;
871 return 1;
872 }
873 else ++filter->pc;
874 }
875 filter->errmsg=CUS "missing end of comment";
876 return -1;
877 }
878
879
880 /*************************************************
881 * Parse optional white space *
882 *************************************************/
883
884 /*
885 Token definition:
886 Spaces, tabs, CRLFs, hash comments or C-style comments
887
888 Arguments:
889 filter points to the Sieve filter including its state
890
891 Returns: 1 success
892 -1 syntax error
893 */
894
895 static int parse_white(struct Sieve *filter)
896 {
897 while (*filter->pc)
898 {
899 if (*filter->pc==' ' || *filter->pc=='\t') ++filter->pc;
900 #ifdef RFC_EOL
901 else if (*filter->pc=='\r' && *(filter->pc+1)=='\n')
902 #else
903 else if (*filter->pc=='\n')
904 #endif
905 {
906 #ifdef RFC_EOL
907 filter->pc+=2;
908 #else
909 ++filter->pc;
910 #endif
911 ++filter->line;
912 }
913 else if (*filter->pc=='#')
914 {
915 if (parse_hashcomment(filter)==-1) return -1;
916 }
917 else if (*filter->pc=='/' && *(filter->pc+1)=='*')
918 {
919 if (parse_comment(filter)==-1) return -1;
920 }
921 else break;
922 }
923 return 1;
924 }
925
926
927 /*************************************************
928 * Parse a optional string *
929 *************************************************/
930
931 /*
932 Token definition:
933 quoted-string = DQUOTE *CHAR DQUOTE
934 ;; in general, \ CHAR inside a string maps to CHAR
935 ;; so \" maps to " and \\ maps to \
936 ;; note that newlines and other characters are all allowed
937 ;; in strings
938
939 multi-line = "text:" *(SP / HTAB) (hash-comment / CRLF)
940 *(multi-line-literal / multi-line-dotstuff)
941 "." CRLF
942 multi-line-literal = [CHAR-NOT-DOT *CHAR-NOT-CRLF] CRLF
943 multi-line-dotstuff = "." 1*CHAR-NOT-CRLF CRLF
944 ;; A line containing only "." ends the multi-line.
945 ;; Remove a leading '.' if followed by another '.'.
946 string = quoted-string / multi-line
947
948 Arguments:
949 filter points to the Sieve filter including its state
950 id specifies identifier to match
951
952 Returns: 1 success
953 -1 syntax error
954 0 identifier not matched
955 */
956
957 static int parse_string(struct Sieve *filter, struct String *data)
958 {
959 int dataCapacity=0;
960
961 data->length=0;
962 data->character=(uschar*)0;
963 if (*filter->pc=='"') /* quoted string */
964 {
965 ++filter->pc;
966 while (*filter->pc)
967 {
968 if (*filter->pc=='"') /* end of string */
969 {
970 int foo=data->length;
971
972 ++filter->pc;
973 data->character=string_cat(data->character,&dataCapacity,&foo,CUS "",1);
974 return 1;
975 }
976 else if (*filter->pc=='\\' && *(filter->pc+1)) /* quoted character */
977 {
978 if (*(filter->pc+1)=='0') data->character=string_cat(data->character,&dataCapacity,&data->length,CUS "",1);
979 else data->character=string_cat(data->character,&dataCapacity,&data->length,filter->pc+1,1);
980 filter->pc+=2;
981 }
982 else /* regular character */
983 {
984 data->character=string_cat(data->character,&dataCapacity,&data->length,filter->pc,1);
985 filter->pc++;
986 }
987 }
988 filter->errmsg=CUS "missing end of string";
989 return -1;
990 }
991 else if (Ustrncmp(filter->pc,CUS "text:",5)==0) /* multiline string */
992 {
993 filter->pc+=5;
994 /* skip optional white space followed by hashed comment or CRLF */
995 while (*filter->pc==' ' || *filter->pc=='\t') ++filter->pc;
996 if (*filter->pc=='#')
997 {
998 if (parse_hashcomment(filter)==-1) return -1;
999 }
1000 #ifdef RFC_EOL
1001 else if (*filter->pc=='\r' && *(filter->pc+1)=='\n')
1002 #else
1003 else if (*filter->pc=='\n')
1004 #endif
1005 {
1006 #ifdef RFC_EOL
1007 filter->pc+=2;
1008 #else
1009 ++filter->pc;
1010 #endif
1011 ++filter->line;
1012 }
1013 else
1014 {
1015 filter->errmsg=CUS "syntax error";
1016 return -1;
1017 }
1018 while (*filter->pc)
1019 {
1020 #ifdef RFC_EOL
1021 if (*filter->pc=='\r' && *(filter->pc+1)=='\n') /* end of line */
1022 #else
1023 if (*filter->pc=='\n') /* end of line */
1024 #endif
1025 {
1026 data->character=string_cat(data->character,&dataCapacity,&data->length,CUS "\r\n",2);
1027 #ifdef RFC_EOL
1028 filter->pc+=2;
1029 #else
1030 ++filter->pc;
1031 #endif
1032 ++filter->line;
1033 #ifdef RFC_EOL
1034 if (*filter->pc=='.' && *(filter->pc+1)=='\r' && *(filter->pc+2)=='\n') /* end of string */
1035 #else
1036 if (*filter->pc=='.' && *(filter->pc+1)=='\n') /* end of string */
1037 #endif
1038 {
1039 data->character=string_cat(data->character,&dataCapacity,&data->length,CUS "",1);
1040 #ifdef RFC_EOL
1041 filter->pc+=3;
1042 #else
1043 filter->pc+=2;
1044 #endif
1045 ++filter->line;
1046 return 1;
1047 }
1048 else if (*filter->pc=='.' && *(filter->pc+1)=='.') /* remove dot stuffing */
1049 {
1050 data->character=string_cat(data->character,&dataCapacity,&data->length,CUS ".",1);
1051 filter->pc+=2;
1052 }
1053 }
1054 else /* regular character */
1055 {
1056 data->character=string_cat(data->character,&dataCapacity,&data->length,filter->pc,1);
1057 filter->pc++;
1058 }
1059 }
1060 filter->errmsg=CUS "missing end of multi line string";
1061 return -1;
1062 }
1063 else return 0;
1064 }
1065
1066
1067 /*************************************************
1068 * Parse a specific identifier *
1069 *************************************************/
1070
1071 /*
1072 Token definition:
1073 identifier = (ALPHA / "_") *(ALPHA DIGIT "_")
1074
1075 Arguments:
1076 filter points to the Sieve filter including its state
1077 id specifies identifier to match
1078
1079 Returns: 1 success
1080 0 identifier not matched
1081 */
1082
1083 static int parse_identifier(struct Sieve *filter, const uschar *id)
1084 {
1085 size_t idlen=Ustrlen(id);
1086
1087 if (Ustrncmp(filter->pc,id,idlen)==0)
1088 {
1089 uschar next=filter->pc[idlen];
1090
1091 if ((next>='A' && next<='Z') || (next>='a' && next<='z') || next=='_' || (next>='0' && next<='9')) return 0;
1092 filter->pc+=idlen;
1093 return 1;
1094 }
1095 else return 0;
1096 }
1097
1098
1099 /*************************************************
1100 * Parse a number *
1101 *************************************************/
1102
1103 /*
1104 Token definition:
1105 number = 1*DIGIT [QUANTIFIER]
1106 QUANTIFIER = "K" / "M" / "G"
1107
1108 Arguments:
1109 filter points to the Sieve filter including its state
1110 data returns value
1111
1112 Returns: 1 success
1113 -1 no string list found
1114 */
1115
1116 static int parse_number(struct Sieve *filter, unsigned long *data)
1117 {
1118 unsigned long d,u;
1119
1120 if (*filter->pc>='0' && *filter->pc<='9')
1121 {
1122 uschar *e;
1123
1124 errno=0;
1125 d=Ustrtoul(filter->pc,&e,10);
1126 if (errno==ERANGE)
1127 {
1128 filter->errmsg=CUstrerror(ERANGE);
1129 return -1;
1130 }
1131 filter->pc=e;
1132 u=1;
1133 if (*filter->pc=='K') { u=1024; ++filter->pc; }
1134 else if (*filter->pc=='M') { u=1024*1024; ++filter->pc; }
1135 else if (*filter->pc=='G') { u=1024*1024*1024; ++filter->pc; }
1136 if (d>(ULONG_MAX/u))
1137 {
1138 filter->errmsg=CUstrerror(ERANGE);
1139 return -1;
1140 }
1141 d*=u;
1142 *data=d;
1143 return 1;
1144 }
1145 else
1146 {
1147 filter->errmsg=CUS "missing number";
1148 return -1;
1149 }
1150 }
1151
1152
1153 /*************************************************
1154 * Parse a string list *
1155 *************************************************/
1156
1157 /*
1158 Grammar:
1159 string-list = "[" string *("," string) "]" / string
1160
1161 Arguments:
1162 filter points to the Sieve filter including its state
1163 data returns string list
1164
1165 Returns: 1 success
1166 -1 no string list found
1167 */
1168
1169 static int parse_stringlist(struct Sieve *filter, struct String **data)
1170 {
1171 const uschar *orig=filter->pc;
1172 int dataCapacity=0;
1173 int dataLength=0;
1174 struct String *d=(struct String*)0;
1175 int m;
1176
1177 if (*filter->pc=='[') /* string list */
1178 {
1179 ++filter->pc;
1180 for (;;)
1181 {
1182 if (parse_white(filter)==-1) goto error;
1183 if ((dataLength+1)>=dataCapacity) /* increase buffer */
1184 {
1185 struct String *new;
1186 int newCapacity; /* Don't amalgamate with next line; some compilers grumble */
1187 newCapacity=dataCapacity?(dataCapacity*=2):(dataCapacity=4);
1188 if ((new=(struct String*)store_get(sizeof(struct String)*newCapacity))==(struct String*)0)
1189 {
1190 filter->errmsg=CUstrerror(errno);
1191 goto error;
1192 }
1193 if (d) memcpy(new,d,sizeof(struct String)*dataLength);
1194 d=new;
1195 dataCapacity=newCapacity;
1196 }
1197 m=parse_string(filter,&d[dataLength]);
1198 if (m==0)
1199 {
1200 if (dataLength==0) break;
1201 else
1202 {
1203 filter->errmsg=CUS "missing string";
1204 goto error;
1205 }
1206 }
1207 else if (m==-1) goto error;
1208 else ++dataLength;
1209 if (parse_white(filter)==-1) goto error;
1210 if (*filter->pc==',') ++filter->pc;
1211 else break;
1212 }
1213 if (*filter->pc==']')
1214 {
1215 d[dataLength].character=(uschar*)0;
1216 d[dataLength].length=-1;
1217 ++filter->pc;
1218 *data=d;
1219 return 1;
1220 }
1221 else
1222 {
1223 filter->errmsg=CUS "missing closing bracket";
1224 goto error;
1225 }
1226 }
1227 else /* single string */
1228 {
1229 if ((d=store_get(sizeof(struct String)*2))==(struct String*)0)
1230 {
1231 return -1;
1232 }
1233 m=parse_string(filter,&d[0]);
1234 if (m==-1)
1235 {
1236 return -1;
1237 }
1238 else if (m==0)
1239 {
1240 filter->pc=orig;
1241 return 0;
1242 }
1243 else
1244 {
1245 d[1].character=(uschar*)0;
1246 d[1].length=-1;
1247 *data=d;
1248 return 1;
1249 }
1250 }
1251 error:
1252 filter->errmsg=CUS "missing string list";
1253 return -1;
1254 }
1255
1256
1257 /*************************************************
1258 * Parse an optional address part specifier *
1259 *************************************************/
1260
1261 /*
1262 Grammar:
1263 address-part = ":localpart" / ":domain" / ":all"
1264 address-part =/ ":user" / ":detail"
1265
1266 Arguments:
1267 filter points to the Sieve filter including its state
1268 a returns address part specified
1269
1270 Returns: 1 success
1271 0 no comparator found
1272 -1 syntax error
1273 */
1274
1275 static int parse_addresspart(struct Sieve *filter, enum AddressPart *a)
1276 {
1277 #ifdef SUBADDRESS
1278 if (parse_identifier(filter,CUS ":user")==1)
1279 {
1280 if (!filter->require_subaddress)
1281 {
1282 filter->errmsg=CUS "missing previous require \"subaddress\";";
1283 return -1;
1284 }
1285 *a=ADDRPART_USER;
1286 return 1;
1287 }
1288 else if (parse_identifier(filter,CUS ":detail")==1)
1289 {
1290 if (!filter->require_subaddress)
1291 {
1292 filter->errmsg=CUS "missing previous require \"subaddress\";";
1293 return -1;
1294 }
1295 *a=ADDRPART_DETAIL;
1296 return 1;
1297 }
1298 else
1299 #endif
1300 if (parse_identifier(filter,CUS ":localpart")==1)
1301 {
1302 *a=ADDRPART_LOCALPART;
1303 return 1;
1304 }
1305 else if (parse_identifier(filter,CUS ":domain")==1)
1306 {
1307 *a=ADDRPART_DOMAIN;
1308 return 1;
1309 }
1310 else if (parse_identifier(filter,CUS ":all")==1)
1311 {
1312 *a=ADDRPART_ALL;
1313 return 1;
1314 }
1315 else return 0;
1316 }
1317
1318
1319 /*************************************************
1320 * Parse an optional comparator *
1321 *************************************************/
1322
1323 /*
1324 Grammar:
1325 comparator = ":comparator" <comparator-name: string>
1326
1327 Arguments:
1328 filter points to the Sieve filter including its state
1329 c returns comparator
1330
1331 Returns: 1 success
1332 0 no comparator found
1333 -1 incomplete comparator found
1334 */
1335
1336 static int parse_comparator(struct Sieve *filter, enum Comparator *c)
1337 {
1338 struct String comparator_name;
1339
1340 if (parse_identifier(filter,CUS ":comparator")==0) return 0;
1341 if (parse_white(filter)==-1) return -1;
1342 switch (parse_string(filter,&comparator_name))
1343 {
1344 case -1: return -1;
1345 case 0:
1346 {
1347 filter->errmsg=CUS "missing comparator";
1348 return -1;
1349 }
1350 default:
1351 {
1352 int match;
1353
1354 if (eq_asciicase(&comparator_name,&str_ioctet,0))
1355 {
1356 *c=COMP_OCTET;
1357 match=1;
1358 }
1359 else if (eq_asciicase(&comparator_name,&str_iascii_casemap,0))
1360 {
1361 *c=COMP_EN_ASCII_CASEMAP;
1362 match=1;
1363 }
1364 else if (eq_asciicase(&comparator_name,&str_enascii_casemap,0))
1365 {
1366 *c=COMP_EN_ASCII_CASEMAP;
1367 match=1;
1368 }
1369 else if (eq_asciicase(&comparator_name,&str_iascii_numeric,0))
1370 {
1371 *c=COMP_ASCII_NUMERIC;
1372 match=1;
1373 }
1374 else
1375 {
1376 filter->errmsg=CUS "invalid comparator";
1377 match=-1;
1378 }
1379 return match;
1380 }
1381 }
1382 }
1383
1384
1385 /*************************************************
1386 * Parse an optional match type *
1387 *************************************************/
1388
1389 /*
1390 Grammar:
1391 match-type = ":is" / ":contains" / ":matches"
1392
1393 Arguments:
1394 filter points to the Sieve filter including its state
1395 m returns match type
1396
1397 Returns: 1 success
1398 0 no match type found
1399 */
1400
1401 static int parse_matchtype(struct Sieve *filter, enum MatchType *m)
1402 {
1403 if (parse_identifier(filter,CUS ":is")==1)
1404 {
1405 *m=MATCH_IS;
1406 return 1;
1407 }
1408 else if (parse_identifier(filter,CUS ":contains")==1)
1409 {
1410 *m=MATCH_CONTAINS;
1411 return 1;
1412 }
1413 else if (parse_identifier(filter,CUS ":matches")==1)
1414 {
1415 *m=MATCH_MATCHES;
1416 return 1;
1417 }
1418 else return 0;
1419 }
1420
1421
1422 /*************************************************
1423 * Parse and interpret an optional test list *
1424 *************************************************/
1425
1426 /*
1427 Grammar:
1428 test-list = "(" test *("," test) ")"
1429
1430 Arguments:
1431 filter points to the Sieve filter including its state
1432 n total number of tests
1433 true number of passed tests
1434 exec Execute parsed statements
1435
1436 Returns: 1 success
1437 0 no test list found
1438 -1 syntax or execution error
1439 */
1440
1441 static int parse_testlist(struct Sieve *filter, int *n, int *true, int exec)
1442 {
1443 if (parse_white(filter)==-1) return -1;
1444 if (*filter->pc=='(')
1445 {
1446 ++filter->pc;
1447 *n=0;
1448 *true=0;
1449 for (;;)
1450 {
1451 int cond;
1452
1453 switch (parse_test(filter,&cond,exec))
1454 {
1455 case -1: return -1;
1456 case 0: filter->errmsg=CUS "missing test"; return -1;
1457 default: ++*n; if (cond) ++*true; break;
1458 }
1459 if (parse_white(filter)==-1) return -1;
1460 if (*filter->pc==',') ++filter->pc;
1461 else break;
1462 }
1463 if (*filter->pc==')')
1464 {
1465 ++filter->pc;
1466 return 1;
1467 }
1468 else
1469 {
1470 filter->errmsg=CUS "missing closing paren";
1471 return -1;
1472 }
1473 }
1474 else return 0;
1475 }
1476
1477
1478 /*************************************************
1479 * Parse and interpret an optional test *
1480 *************************************************/
1481
1482 /*
1483 Arguments:
1484 filter points to the Sieve filter including its state
1485 cond returned condition status
1486 exec Execute parsed statements
1487
1488 Returns: 1 success
1489 0 no test found
1490 -1 syntax or execution error
1491 */
1492
1493 static int parse_test(struct Sieve *filter, int *cond, int exec)
1494 {
1495 if (parse_white(filter)==-1) return -1;
1496 if (parse_identifier(filter,CUS "address"))
1497 {
1498 /*
1499 address-test = "address" { [address-part] [comparator] [match-type] }
1500 <header-list: string-list> <key-list: string-list>
1501
1502 header-list From, To, Cc, Bcc, Sender, Resent-From, Resent-To
1503 */
1504
1505 enum AddressPart addressPart=ADDRPART_ALL;
1506 enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
1507 enum MatchType matchType=MATCH_IS;
1508 struct String *hdr,*h,*key,*k;
1509 int m;
1510 int ap=0,co=0,mt=0;
1511
1512 for (;;)
1513 {
1514 if (parse_white(filter)==-1) return -1;
1515 if ((m=parse_addresspart(filter,&addressPart))!=0)
1516 {
1517 if (m==-1) return -1;
1518 if (ap)
1519 {
1520 filter->errmsg=CUS "address part already specified";
1521 return -1;
1522 }
1523 else ap=1;
1524 }
1525 else if ((m=parse_comparator(filter,&comparator))!=0)
1526 {
1527 if (m==-1) return -1;
1528 if (co)
1529 {
1530 filter->errmsg=CUS "comparator already specified";
1531 return -1;
1532 }
1533 else co=1;
1534 }
1535 else if ((m=parse_matchtype(filter,&matchType))!=0)
1536 {
1537 if (m==-1) return -1;
1538 if (mt)
1539 {
1540 filter->errmsg=CUS "match type already specified";
1541 return -1;
1542 }
1543 else mt=1;
1544 }
1545 else break;
1546 }
1547 if (parse_white(filter)==-1) return -1;
1548 if ((m=parse_stringlist(filter,&hdr))!=1)
1549 {
1550 if (m==0) filter->errmsg=CUS "header string list expected";
1551 return -1;
1552 }
1553 if (parse_white(filter)==-1) return -1;
1554 if ((m=parse_stringlist(filter,&key))!=1)
1555 {
1556 if (m==0) filter->errmsg=CUS "key string list expected";
1557 return -1;
1558 }
1559 *cond=0;
1560 for (h=hdr; h->length!=-1 && !*cond; ++h)
1561 {
1562 uschar *header_value=(uschar*)0,*extracted_addr,*end_addr;
1563
1564 if
1565 (
1566 !eq_asciicase(h,&str_from,0)
1567 && !eq_asciicase(h,&str_to,0)
1568 && !eq_asciicase(h,&str_cc,0)
1569 && !eq_asciicase(h,&str_bcc,0)
1570 && !eq_asciicase(h,&str_sender,0)
1571 && !eq_asciicase(h,&str_resent_from,0)
1572 && !eq_asciicase(h,&str_resent_to,0)
1573 )
1574 {
1575 filter->errmsg=CUS "invalid header field";
1576 return -1;
1577 }
1578 if (exec)
1579 {
1580 /* We are only interested in addresses below, so no MIME decoding */
1581 header_value=expand_string(string_sprintf("$rheader_%s",quote(h)));
1582 if (header_value == NULL)
1583 {
1584 filter->errmsg=CUS "header string expansion failed";
1585 return -1;
1586 }
1587 parse_allow_group = TRUE;
1588 while (*header_value && !*cond)
1589 {
1590 uschar *error;
1591 int start, end, domain;
1592 int saveend;
1593 uschar *part=NULL;
1594
1595 end_addr = parse_find_address_end(header_value, FALSE);
1596 saveend = *end_addr;
1597 *end_addr = 0;
1598 extracted_addr = parse_extract_address(header_value, &error, &start, &end, &domain, FALSE);
1599
1600 if (extracted_addr) switch (addressPart)
1601 {
1602 case ADDRPART_ALL: part=extracted_addr; break;
1603 #ifdef SUBADDRESS
1604 case ADDRPART_USER:
1605 #endif
1606 case ADDRPART_LOCALPART: part=extracted_addr; part[domain-1]='\0'; break;
1607 case ADDRPART_DOMAIN: part=extracted_addr+domain; break;
1608 #ifdef SUBADDRESS
1609 case ADDRPART_DETAIL: part=NULL; break;
1610 #endif
1611 }
1612
1613 *end_addr = saveend;
1614 if (part)
1615 {
1616 for (k=key; k->length!=-1; ++k)
1617 {
1618 struct String partStr;
1619
1620 partStr.character=part;
1621 partStr.length=Ustrlen(part);
1622 if (extracted_addr)
1623 {
1624 *cond=compare(filter,k,&partStr,comparator,matchType);
1625 if (*cond==-1) return -1;
1626 if (*cond) break;
1627 }
1628 }
1629 }
1630 if (saveend == 0) break;
1631 header_value = end_addr + 1;
1632 }
1633 }
1634 }
1635 return 1;
1636 }
1637 else if (parse_identifier(filter,CUS "allof"))
1638 {
1639 /*
1640 allof-test = "allof" <tests: test-list>
1641 */
1642
1643 int n,true;
1644
1645 switch (parse_testlist(filter,&n,&true,exec))
1646 {
1647 case -1: return -1;
1648 case 0: filter->errmsg=CUS "missing test list"; return -1;
1649 default: *cond=(n==true); return 1;
1650 }
1651 }
1652 else if (parse_identifier(filter,CUS "anyof"))
1653 {
1654 /*
1655 anyof-test = "anyof" <tests: test-list>
1656 */
1657
1658 int n,true;
1659
1660 switch (parse_testlist(filter,&n,&true,exec))
1661 {
1662 case -1: return -1;
1663 case 0: filter->errmsg=CUS "missing test list"; return -1;
1664 default: *cond=(true>0); return 1;
1665 }
1666 }
1667 else if (parse_identifier(filter,CUS "exists"))
1668 {
1669 /*
1670 exists-test = "exists" <header-names: string-list>
1671 */
1672
1673 struct String *hdr,*h;
1674 int m;
1675
1676 if (parse_white(filter)==-1) return -1;
1677 if ((m=parse_stringlist(filter,&hdr))!=1)
1678 {
1679 if (m==0) filter->errmsg=CUS "header string list expected";
1680 return -1;
1681 }
1682 if (exec)
1683 {
1684 *cond=1;
1685 for (h=hdr; h->length!=-1 && *cond; ++h)
1686 {
1687 uschar *header_def;
1688
1689 header_def=expand_string(string_sprintf("${if def:header_%s {true}{false}}",quote(h)));
1690 if (header_def == NULL)
1691 {
1692 filter->errmsg=CUS "header string expansion failed";
1693 return -1;
1694 }
1695 if (Ustrcmp(header_def,"false")==0) *cond=0;
1696 }
1697 }
1698 return 1;
1699 }
1700 else if (parse_identifier(filter,CUS "false"))
1701 {
1702 /*
1703 false-test = "false"
1704 */
1705
1706 *cond=0;
1707 return 1;
1708 }
1709 else if (parse_identifier(filter,CUS "header"))
1710 {
1711 /*
1712 header-test = "header" { [comparator] [match-type] }
1713 <header-names: string-list> <key-list: string-list>
1714 */
1715
1716 enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
1717 enum MatchType matchType=MATCH_IS;
1718 struct String *hdr,*h,*key,*k;
1719 int m;
1720 int co=0,mt=0;
1721
1722 for (;;)
1723 {
1724 if (parse_white(filter)==-1) return -1;
1725 if ((m=parse_comparator(filter,&comparator))!=0)
1726 {
1727 if (m==-1) return -1;
1728 if (co)
1729 {
1730 filter->errmsg=CUS "comparator already specified";
1731 return -1;
1732 }
1733 else co=1;
1734 }
1735 else if ((m=parse_matchtype(filter,&matchType))!=0)
1736 {
1737 if (m==-1) return -1;
1738 if (mt)
1739 {
1740 filter->errmsg=CUS "match type already specified";
1741 return -1;
1742 }
1743 else mt=1;
1744 }
1745 else break;
1746 }
1747 if (parse_white(filter)==-1) return -1;
1748 if ((m=parse_stringlist(filter,&hdr))!=1)
1749 {
1750 if (m==0) filter->errmsg=CUS "header string list expected";
1751 return -1;
1752 }
1753 if (parse_white(filter)==-1) return -1;
1754 if ((m=parse_stringlist(filter,&key))!=1)
1755 {
1756 if (m==0) filter->errmsg=CUS "key string list expected";
1757 return -1;
1758 }
1759 *cond=0;
1760 for (h=hdr; h->length!=-1 && !*cond; ++h)
1761 {
1762 if (!is_header(h))
1763 {
1764 filter->errmsg=CUS "invalid header field";
1765 return -1;
1766 }
1767 if (exec)
1768 {
1769 struct String header_value;
1770 uschar *header_def;
1771
1772 expand_header(&header_value,h);
1773 header_def=expand_string(string_sprintf("${if def:header_%s {true}{false}}",quote(h)));
1774 if (header_value.character == NULL || header_def == NULL)
1775 {
1776 filter->errmsg=CUS "header string expansion failed";
1777 return -1;
1778 }
1779 for (k=key; k->length!=-1; ++k)
1780 {
1781 if (Ustrcmp(header_def,"true")==0)
1782 {
1783 *cond=compare(filter,k,&header_value,comparator,matchType);
1784 if (*cond==-1) return -1;
1785 if (*cond) break;
1786 }
1787 }
1788 }
1789 }
1790 return 1;
1791 }
1792 else if (parse_identifier(filter,CUS "not"))
1793 {
1794 if (parse_white(filter)==-1) return -1;
1795 switch (parse_test(filter,cond,exec))
1796 {
1797 case -1: return -1;
1798 case 0: filter->errmsg=CUS "missing test"; return -1;
1799 default: *cond=!*cond; return 1;
1800 }
1801 }
1802 else if (parse_identifier(filter,CUS "size"))
1803 {
1804 /*
1805 relop = ":over" / ":under"
1806 size-test = "size" relop <limit: number>
1807 */
1808
1809 unsigned long limit;
1810 int overNotUnder;
1811
1812 if (parse_white(filter)==-1) return -1;
1813 if (parse_identifier(filter,CUS ":over")) overNotUnder=1;
1814 else if (parse_identifier(filter,CUS ":under")) overNotUnder=0;
1815 else
1816 {
1817 filter->errmsg=CUS "missing :over or :under";
1818 return -1;
1819 }
1820 if (parse_white(filter)==-1) return -1;
1821 if (parse_number(filter,&limit)==-1) return -1;
1822 *cond=(overNotUnder ? (message_size>limit) : (message_size<limit));
1823 return 1;
1824 }
1825 else if (parse_identifier(filter,CUS "true"))
1826 {
1827 *cond=1;
1828 return 1;
1829 }
1830 else if (parse_identifier(filter,CUS "envelope"))
1831 {
1832 /*
1833 envelope-test = "envelope" { [comparator] [address-part] [match-type] }
1834 <envelope-part: string-list> <key-list: string-list>
1835
1836 envelope-part is case insensitive "from" or "to"
1837 */
1838
1839 enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
1840 enum AddressPart addressPart=ADDRPART_ALL;
1841 enum MatchType matchType=MATCH_IS;
1842 struct String *env,*e,*key,*k;
1843 int m;
1844 int co=0,ap=0,mt=0;
1845
1846 if (!filter->require_envelope)
1847 {
1848 filter->errmsg=CUS "missing previous require \"envelope\";";
1849 return -1;
1850 }
1851 for (;;)
1852 {
1853 if (parse_white(filter)==-1) return -1;
1854 if ((m=parse_comparator(filter,&comparator))!=0)
1855 {
1856 if (m==-1) return -1;
1857 if (co)
1858 {
1859 filter->errmsg=CUS "comparator already specified";
1860 return -1;
1861 }
1862 else co=1;
1863 }
1864 else if ((m=parse_addresspart(filter,&addressPart))!=0)
1865 {
1866 if (m==-1) return -1;
1867 if (ap)
1868 {
1869 filter->errmsg=CUS "address part already specified";
1870 return -1;
1871 }
1872 else ap=1;
1873 }
1874 else if ((m=parse_matchtype(filter,&matchType))!=0)
1875 {
1876 if (m==-1) return -1;
1877 if (mt)
1878 {
1879 filter->errmsg=CUS "match type already specified";
1880 return -1;
1881 }
1882 else mt=1;
1883 }
1884 else break;
1885 }
1886 if (parse_white(filter)==-1) return -1;
1887 if ((m=parse_stringlist(filter,&env))!=1)
1888 {
1889 if (m==0) filter->errmsg=CUS "envelope string list expected";
1890 return -1;
1891 }
1892 if (parse_white(filter)==-1) return -1;
1893 if ((m=parse_stringlist(filter,&key))!=1)
1894 {
1895 if (m==0) filter->errmsg=CUS "key string list expected";
1896 return -1;
1897 }
1898 *cond=0;
1899 for (e=env; e->length!=-1 && !*cond; ++e)
1900 {
1901 const uschar *envelopeExpr=CUS 0;
1902 uschar *envelope=US 0;
1903
1904 if (eq_asciicase(e,&str_from,0))
1905 {
1906 switch (addressPart)
1907 {
1908 case ADDRPART_ALL: envelopeExpr=CUS "$sender_address"; break;
1909 #ifdef SUBADDRESS
1910 case ADDRPART_USER:
1911 #endif
1912 case ADDRPART_LOCALPART: envelopeExpr=CUS "${local_part:$sender_address}"; break;
1913 case ADDRPART_DOMAIN: envelopeExpr=CUS "${domain:$sender_address}"; break;
1914 #ifdef SUBADDRESS
1915 case ADDRPART_DETAIL: envelopeExpr=CUS 0; break;
1916 #endif
1917 }
1918 }
1919 else if (eq_asciicase(e,&str_to,0))
1920 {
1921 switch (addressPart)
1922 {
1923 case ADDRPART_ALL: envelopeExpr=CUS "$local_part_prefix$local_part$local_part_suffix@$domain"; break;
1924 #ifdef SUBADDRESS
1925 case ADDRPART_USER: envelopeExpr=filter->useraddress; break;
1926 case ADDRPART_DETAIL: envelopeExpr=filter->subaddress; break;
1927 #endif
1928 case ADDRPART_LOCALPART: envelopeExpr=CUS "$local_part_prefix$local_part$local_part_suffix"; break;
1929 case ADDRPART_DOMAIN: envelopeExpr=CUS "$domain"; break;
1930 }
1931 }
1932 else
1933 {
1934 filter->errmsg=CUS "invalid envelope string";
1935 return -1;
1936 }
1937 if (exec && envelopeExpr)
1938 {
1939 if ((envelope=expand_string(US envelopeExpr)) == NULL)
1940 {
1941 filter->errmsg=CUS "header string expansion failed";
1942 return -1;
1943 }
1944 for (k=key; k->length!=-1; ++k)
1945 {
1946 struct String envelopeStr;
1947
1948 envelopeStr.character=envelope;
1949 envelopeStr.length=Ustrlen(envelope);
1950 *cond=compare(filter,k,&envelopeStr,comparator,matchType);
1951 if (*cond==-1) return -1;
1952 if (*cond) break;
1953 }
1954 }
1955 }
1956 return 1;
1957 }
1958 else return 0;
1959 }
1960
1961
1962 /*************************************************
1963 * Parse and interpret an optional block *
1964 *************************************************/
1965
1966 /*
1967 Arguments:
1968 filter points to the Sieve filter including its state
1969 exec Execute parsed statements
1970 generated where to hang newly-generated addresses
1971
1972 Returns: 2 success by stop
1973 1 other success
1974 0 no block command found
1975 -1 syntax or execution error
1976 */
1977
1978 static int parse_block(struct Sieve *filter, int exec,
1979 address_item **generated)
1980 {
1981 int r;
1982
1983 if (parse_white(filter)==-1) return -1;
1984 if (*filter->pc=='{')
1985 {
1986 ++filter->pc;
1987 if ((r=parse_commands(filter,exec,generated))==-1 || r==2) return r;
1988 if (*filter->pc=='}')
1989 {
1990 ++filter->pc;
1991 return 1;
1992 }
1993 else
1994 {
1995 filter->errmsg=CUS "expecting command or closing brace";
1996 return -1;
1997 }
1998 }
1999 else return 0;
2000 }
2001
2002
2003 /*************************************************
2004 * Match a semicolon *
2005 *************************************************/
2006
2007 /*
2008 Arguments:
2009 filter points to the Sieve filter including its state
2010
2011 Returns: 1 success
2012 -1 syntax error
2013 */
2014
2015 static int parse_semicolon(struct Sieve *filter)
2016 {
2017 if (parse_white(filter)==-1) return -1;
2018 if (*filter->pc==';')
2019 {
2020 ++filter->pc;
2021 return 1;
2022 }
2023 else
2024 {
2025 filter->errmsg=CUS "missing semicolon";
2026 return -1;
2027 }
2028 }
2029
2030
2031 /*************************************************
2032 * Parse and interpret a Sieve command *
2033 *************************************************/
2034
2035 /*
2036 Arguments:
2037 filter points to the Sieve filter including its state
2038 exec Execute parsed statements
2039 generated where to hang newly-generated addresses
2040
2041 Returns: 2 success by stop
2042 1 other success
2043 -1 syntax or execution error
2044 */
2045 static int parse_commands(struct Sieve *filter, int exec,
2046 address_item **generated)
2047 {
2048 while (*filter->pc)
2049 {
2050 if (parse_white(filter)==-1) return -1;
2051 if (parse_identifier(filter,CUS "if"))
2052 {
2053 /*
2054 if-command = "if" test block *( "elsif" test block ) [ else block ]
2055 */
2056
2057 int cond,m,unsuccessful;
2058
2059 /* test block */
2060 if (parse_white(filter)==-1) return -1;
2061 if ((m=parse_test(filter,&cond,exec))==-1) return -1;
2062 if (m==0)
2063 {
2064 filter->errmsg=CUS "missing test";
2065 return -1;
2066 }
2067 if ((filter_test != FTEST_NONE && debug_selector != 0) ||
2068 (debug_selector & D_filter) != 0)
2069 {
2070 if (exec) debug_printf("if %s\n",cond?"true":"false");
2071 }
2072 m=parse_block(filter,exec ? cond : 0, generated);
2073 if (m==-1 || m==2) return m;
2074 if (m==0)
2075 {
2076 filter->errmsg=CUS "missing block";
2077 return -1;
2078 }
2079 unsuccessful = !cond;
2080 for (;;) /* elsif test block */
2081 {
2082 if (parse_white(filter)==-1) return -1;
2083 if (parse_identifier(filter,CUS "elsif"))
2084 {
2085 if (parse_white(filter)==-1) return -1;
2086 m=parse_test(filter,&cond,exec && unsuccessful);
2087 if (m==-1 || m==2) return m;
2088 if (m==0)
2089 {
2090 filter->errmsg=CUS "missing test";
2091 return -1;
2092 }
2093 if ((filter_test != FTEST_NONE && debug_selector != 0) ||
2094 (debug_selector & D_filter) != 0)
2095 {
2096 if (exec) debug_printf("elsif %s\n",cond?"true":"false");
2097 }
2098 m=parse_block(filter,exec && unsuccessful ? cond : 0, generated);
2099 if (m==-1 || m==2) return m;
2100 if (m==0)
2101 {
2102 filter->errmsg=CUS "missing block";
2103 return -1;
2104 }
2105 if (exec && unsuccessful && cond) unsuccessful = 0;
2106 }
2107 else break;
2108 }
2109 /* else block */
2110 if (parse_white(filter)==-1) return -1;
2111 if (parse_identifier(filter,CUS "else"))
2112 {
2113 m=parse_block(filter,exec && unsuccessful, generated);
2114 if (m==-1 || m==2) return m;
2115 if (m==0)
2116 {
2117 filter->errmsg=CUS "missing block";
2118 return -1;
2119 }
2120 }
2121 }
2122 else if (parse_identifier(filter,CUS "stop"))
2123 {
2124 /*
2125 stop-command = "stop" { stop-options } ";"
2126 stop-options =
2127 */
2128
2129 if (parse_semicolon(filter)==-1) return -1;
2130 if (exec)
2131 {
2132 filter->pc+=Ustrlen(filter->pc);
2133 return 2;
2134 }
2135 }
2136 else if (parse_identifier(filter,CUS "keep"))
2137 {
2138 /*
2139 keep-command = "keep" { keep-options } ";"
2140 keep-options =
2141 */
2142
2143 if (parse_semicolon(filter)==-1) return -1;
2144 if (exec)
2145 {
2146 add_addr(generated,US"inbox",1,0,0,0);
2147 filter->keep = 0;
2148 }
2149 }
2150 else if (parse_identifier(filter,CUS "discard"))
2151 {
2152 /*
2153 discard-command = "discard" { discard-options } ";"
2154 discard-options =
2155 */
2156
2157 if (parse_semicolon(filter)==-1) return -1;
2158 if (exec) filter->keep=0;
2159 }
2160 else if (parse_identifier(filter,CUS "redirect"))
2161 {
2162 /*
2163 redirect-command = "redirect" redirect-options "string" ";"
2164 redirect-options =
2165 redirect-options =) ":copy"
2166 */
2167
2168 struct String recipient;
2169 int m;
2170 int copy=0;
2171
2172 for (;;)
2173 {
2174 if (parse_white(filter)==-1) return -1;
2175 if (parse_identifier(filter,CUS ":copy")==1)
2176 {
2177 if (!filter->require_copy)
2178 {
2179 filter->errmsg=CUS "missing previous require \"copy\";";
2180 return -1;
2181 }
2182 copy=1;
2183 }
2184 else break;
2185 }
2186 if (parse_white(filter)==-1) return -1;
2187 if ((m=parse_string(filter,&recipient))!=1)
2188 {
2189 if (m==0) filter->errmsg=CUS "missing redirect recipient string";
2190 return -1;
2191 }
2192 if (strchr(CCS recipient.character,'@')==(char*)0)
2193 {
2194 filter->errmsg=CUS "unqualified recipient address";
2195 return -1;
2196 }
2197 if (exec)
2198 {
2199 add_addr(generated,recipient.character,0,0,0,0);
2200 if (!copy) filter->keep = 0;
2201 }
2202 if (parse_semicolon(filter)==-1) return -1;
2203 }
2204 else if (parse_identifier(filter,CUS "fileinto"))
2205 {
2206 /*
2207 fileinto-command = "fileinto" { fileinto-options } string ";"
2208 fileinto-options =
2209 fileinto-options =) [ ":copy" ]
2210 */
2211
2212 struct String folder;
2213 uschar *s;
2214 int m;
2215 unsigned long maxage, maxmessages, maxstorage;
2216 int copy=0;
2217
2218 maxage = maxmessages = maxstorage = 0;
2219 if (!filter->require_fileinto)
2220 {
2221 filter->errmsg=CUS "missing previous require \"fileinto\";";
2222 return -1;
2223 }
2224 for (;;)
2225 {
2226 if (parse_white(filter)==-1) return -1;
2227 if (parse_identifier(filter,CUS ":copy")==1)
2228 {
2229 if (!filter->require_copy)
2230 {
2231 filter->errmsg=CUS "missing previous require \"copy\";";
2232 return -1;
2233 }
2234 copy=1;
2235 }
2236 else break;
2237 }
2238 if (parse_white(filter)==-1) return -1;
2239 if ((m=parse_string(filter,&folder))!=1)
2240 {
2241 if (m==0) filter->errmsg=CUS "missing fileinto folder string";
2242 return -1;
2243 }
2244 m=0; s=folder.character;
2245 if (folder.length==0) m=1;
2246 if (Ustrcmp(s,"..")==0 || Ustrncmp(s,"../",3)==0) m=1;
2247 else while (*s)
2248 {
2249 if (Ustrcmp(s,"/..")==0 || Ustrncmp(s,"/../",4)==0) { m=1; break; }
2250 ++s;
2251 }
2252 if (m)
2253 {
2254 filter->errmsg=CUS "invalid folder";
2255 return -1;
2256 }
2257 if (exec)
2258 {
2259 add_addr(generated, folder.character, 1, maxage, maxmessages, maxstorage);
2260 if (!copy) filter->keep = 0;
2261 }
2262 if (parse_semicolon(filter)==-1) return -1;
2263 }
2264 #ifdef NOTIFY
2265 else if (parse_identifier(filter,CUS "notify"))
2266 {
2267 /*
2268 notify-command = "notify" { notify-options } ";"
2269 notify-options = [":method" string]
2270 [":message" string]
2271 */
2272
2273 int m;
2274 struct String method;
2275 struct String message;
2276
2277 if (!filter->require_notify)
2278 {
2279 filter->errmsg=CUS "missing previous require \"notify\";";
2280 return -1;
2281 }
2282 method.character=(uschar*)0;
2283 method.length=-1;
2284 message.character=(uschar*)0;
2285 message.length=-1;
2286 for (;;)
2287 {
2288 if (parse_white(filter)==-1) return -1;
2289 if (parse_identifier(filter,CUS ":method")==1)
2290 {
2291 if (parse_white(filter)==-1) return -1;
2292 if ((m=parse_string(filter,&method))!=1)
2293 {
2294 if (m==0) filter->errmsg=CUS "method string expected";
2295 return -1;
2296 }
2297 }
2298 else if (parse_identifier(filter,CUS ":message")==1)
2299 {
2300 if (parse_white(filter)==-1) return -1;
2301 if ((m=parse_string(filter,&message))!=1)
2302 {
2303 if (m==0) filter->errmsg=CUS "message string expected";
2304 return -1;
2305 }
2306 }
2307 else break;
2308 }
2309 if (parse_semicolon(filter)==-1) return -1;
2310 }
2311 #endif
2312 #ifdef VACATION
2313 else if (parse_identifier(filter,CUS "vacation"))
2314 {
2315 /*
2316 vacation-command = "vacation" { vacation-options } <reason: string> ";"
2317 vacation-options = [":days" number]
2318 [":subject" string]
2319 [":from" string]
2320 [":addresses" string-list]
2321 [":mime"]
2322 [":handle" string]
2323 */
2324
2325 int m;
2326 unsigned long days;
2327 struct String subject;
2328 struct String from;
2329 struct String *addresses;
2330 int reason_is_mime;
2331 string_item *aliases;
2332 struct String handle;
2333 struct String reason;
2334
2335 if (!filter->require_vacation)
2336 {
2337 filter->errmsg=CUS "missing previous require \"vacation\";";
2338 return -1;
2339 }
2340 if (exec)
2341 {
2342 if (filter->vacation_ran)
2343 {
2344 filter->errmsg=CUS "trying to execute vacation more than once";
2345 return -1;
2346 }
2347 filter->vacation_ran=1;
2348 }
2349 days=VACATION_MIN_DAYS>7 ? VACATION_MIN_DAYS : 7;
2350 subject.character=(uschar*)0;
2351 subject.length=-1;
2352 from.character=(uschar*)0;
2353 from.length=-1;
2354 addresses=(struct String*)0;
2355 aliases=NULL;
2356 reason_is_mime=0;
2357 handle.character=(uschar*)0;
2358 handle.length=-1;
2359 for (;;)
2360 {
2361 if (parse_white(filter)==-1) return -1;
2362 if (parse_identifier(filter,CUS ":days")==1)
2363 {
2364 if (parse_white(filter)==-1) return -1;
2365 if (parse_number(filter,&days)==-1) return -1;
2366 if (days<VACATION_MIN_DAYS) days=VACATION_MIN_DAYS;
2367 else if (days>VACATION_MAX_DAYS) days=VACATION_MAX_DAYS;
2368 }
2369 else if (parse_identifier(filter,CUS ":subject")==1)
2370 {
2371 if (parse_white(filter)==-1) return -1;
2372 if ((m=parse_string(filter,&subject))!=1)
2373 {
2374 if (m==0) filter->errmsg=CUS "subject string expected";
2375 return -1;
2376 }
2377 }
2378 else if (parse_identifier(filter,CUS ":from")==1)
2379 {
2380 int start, end, domain;
2381 uschar *error,*ss;
2382
2383 if (parse_white(filter)==-1) return -1;
2384 if ((m=parse_string(filter,&from))!=1)
2385 {
2386 if (m==0) filter->errmsg=CUS "from string expected";
2387 return -1;
2388 }
2389 if (from.length>0)
2390 {
2391 ss = parse_extract_address(from.character, &error, &start, &end, &domain,
2392 FALSE);
2393 if (ss == NULL)
2394 {
2395 filter->errmsg=string_sprintf("malformed address \"%s\" in "
2396 "Sieve filter: %s", from.character, error);
2397 return -1;
2398 }
2399 }
2400 else
2401 {
2402 filter->errmsg=CUS "empty :from address in Sieve filter";
2403 return -1;
2404 }
2405 }
2406 else if (parse_identifier(filter,CUS ":addresses")==1)
2407 {
2408 struct String *a;
2409
2410 if (parse_white(filter)==-1) return -1;
2411 if ((m=parse_stringlist(filter,&addresses))!=1)
2412 {
2413 if (m==0) filter->errmsg=CUS "addresses string list expected";
2414 return -1;
2415 }
2416 for (a=addresses; a->length!=-1; ++a)
2417 {
2418 string_item *new;
2419
2420 new=store_get(sizeof(string_item));
2421 new->text=store_get(a->length+1);
2422 if (a->length) memcpy(new->text,a->character,a->length);
2423 new->text[a->length]='\0';
2424 new->next=aliases;
2425 aliases=new;
2426 }
2427 }
2428 else if (parse_identifier(filter,CUS ":mime")==1)
2429 reason_is_mime=1;
2430 else if (parse_identifier(filter,CUS ":handle")==1)
2431 {
2432 if (parse_white(filter)==-1) return -1;
2433 if ((m=parse_string(filter,&from))!=1)
2434 {
2435 if (m==0) filter->errmsg=CUS "handle string expected";
2436 return -1;
2437 }
2438 }
2439 else break;
2440 }
2441 if (parse_white(filter)==-1) return -1;
2442 if ((m=parse_string(filter,&reason))!=1)
2443 {
2444 if (m==0) filter->errmsg=CUS "missing reason string";
2445 return -1;
2446 }
2447 if (reason_is_mime)
2448 {
2449 uschar *s,*end;
2450
2451 for (s=reason.character,end=reason.character+reason.length; s<end && (*s&0x80)==0; ++s);
2452 if (s<end)
2453 {
2454 filter->errmsg=CUS "MIME reason string contains 8bit text";
2455 return -1;
2456 }
2457 }
2458 if (parse_semicolon(filter)==-1) return -1;
2459
2460 if (exec)
2461 {
2462 address_item *addr;
2463 int capacity,start;
2464 uschar *buffer;
2465 int buffer_capacity;
2466 struct String key;
2467 md5 base;
2468 uschar digest[16];
2469 uschar hexdigest[33];
2470 int i;
2471 uschar *once;
2472
2473 if (filter_personal(aliases,TRUE))
2474 {
2475 if (filter_test == FTEST_NONE)
2476 {
2477 /* ensure oncelog directory exists; failure will be detected later */
2478
2479 (void)directory_make(NULL, filter->vacation_directory, 0700, FALSE);
2480 }
2481 /* build oncelog filename */
2482
2483 key.character=(uschar*)0;
2484 key.length=0;
2485 capacity=0;
2486 if (handle.length==-1)
2487 {
2488 if (subject.length!=-1) key.character=string_cat(key.character,&capacity,&key.length,subject.character,subject.length);
2489 if (from.length!=-1) key.character=string_cat(key.character,&capacity,&key.length,from.character,from.length);
2490 key.character=string_cat(key.character,&capacity,&key.length,reason_is_mime?US"1":US"0",1);
2491 key.character=string_cat(key.character,&capacity,&key.length,reason.character,reason.length);
2492 }
2493 else
2494 key=handle;
2495 md5_start(&base);
2496 md5_end(&base, key.character, key.length, digest);
2497 for (i = 0; i < 16; i++) sprintf(CS (hexdigest+2*i), "%02X", digest[i]);
2498 if (filter_test != FTEST_NONE)
2499 {
2500 debug_printf("Sieve: mail was personal, vacation file basename: %s\n", hexdigest);
2501 }
2502 else
2503 {
2504 capacity=Ustrlen(filter->vacation_directory);
2505 start=capacity;
2506 once=string_cat(filter->vacation_directory,&capacity,&start,US"/",1);
2507 once=string_cat(once,&capacity,&start,hexdigest,33);
2508 once[start] = '\0';
2509
2510 /* process subject */
2511
2512 if (subject.length==-1)
2513 {
2514 expand_header(&subject,&str_subject);
2515 capacity=6;
2516 start=6;
2517 subject.character=string_cat(US"Auto: ",&capacity,&start,subject.character,subject.length);
2518 subject.length=start;
2519 }
2520
2521 /* add address to list of generated addresses */
2522
2523 addr = deliver_make_addr(string_sprintf(">%.256s", sender_address), FALSE);
2524 setflag(addr, af_pfr);
2525 setflag(addr, af_ignore_error);
2526 addr->next = *generated;
2527 *generated = addr;
2528 addr->reply = store_get(sizeof(reply_item));
2529 memset(addr->reply,0,sizeof(reply_item)); /* XXX */
2530 addr->reply->to = string_copy(sender_address);
2531 if (from.length==-1)
2532 addr->reply->from = expand_string(US"$local_part@$domain");
2533 else
2534 addr->reply->from = from.character;
2535 /* Allocation is larger than neccessary, but enough even for split MIME words */
2536 buffer_capacity=16+4*subject.length;
2537 buffer=store_get(buffer_capacity);
2538 addr->reply->subject=parse_quote_2047(subject.character, subject.length, US"utf-8", buffer, buffer_capacity);
2539 addr->reply->oncelog=once;
2540 addr->reply->once_repeat=days*86400;
2541
2542 /* build body and MIME headers */
2543
2544 if (reason_is_mime)
2545 {
2546 uschar *mime_body,*reason_end;
2547 #ifdef RFC_EOL
2548 static const uschar nlnl[]="\r\n\r\n";
2549 #else
2550 static const uschar nlnl[]="\n\n";
2551 #endif
2552
2553 for
2554 (
2555 mime_body=reason.character,reason_end=reason.character+reason.length;
2556 mime_body<(reason_end-sizeof(nlnl)-1) && memcmp(mime_body,nlnl,sizeof(nlnl)-1);
2557 ++mime_body
2558 );
2559 capacity = 0;
2560 start = 0;
2561 addr->reply->headers = string_cat(NULL,&capacity,&start,reason.character,mime_body-reason.character);
2562 addr->reply->headers[start] = '\0';
2563 capacity = 0;
2564 start = 0;
2565 if (mime_body+(sizeof(nlnl)-1)<reason_end) mime_body+=sizeof(nlnl)-1;
2566 else mime_body=reason_end-1;
2567 addr->reply->text = string_cat(NULL,&capacity,&start,mime_body,reason_end-mime_body);
2568 addr->reply->text[start] = '\0';
2569 }
2570 else
2571 {
2572 struct String qp;
2573
2574 capacity = 0;
2575 start = reason.length;
2576 addr->reply->headers = US"MIME-Version: 1.0\n"
2577 "Content-Type: text/plain;\n"
2578 "\tcharset=\"utf-8\"\n"
2579 "Content-Transfer-Encoding: quoted-printable";
2580 addr->reply->text = quoted_printable_encode(&reason,&qp)->character;
2581 }
2582 }
2583 }
2584 else if (filter_test != FTEST_NONE)
2585 {
2586 debug_printf("Sieve: mail was not personal, vacation would ignore it\n");
2587 }
2588 }
2589 }
2590 else break;
2591 #endif
2592 }
2593 return 1;
2594 }
2595
2596
2597 /*************************************************
2598 * Parse and interpret a sieve filter *
2599 *************************************************/
2600
2601 /*
2602 Arguments:
2603 filter points to the Sieve filter including its state
2604 exec Execute parsed statements
2605 generated where to hang newly-generated addresses
2606
2607 Returns: 1 success
2608 -1 syntax or execution error
2609 */
2610
2611 static int parse_start(struct Sieve *filter, int exec,
2612 address_item **generated)
2613 {
2614 filter->pc=filter->filter;
2615 filter->line=1;
2616 filter->keep=1;
2617 filter->require_envelope=0;
2618 filter->require_fileinto=0;
2619 #ifdef NOTIFY
2620 filter->require_notify=0;
2621 #endif
2622 #ifdef SUBADDRESS
2623 filter->require_subaddress=0;
2624 #endif
2625 #ifdef VACATION
2626 filter->require_vacation=0;
2627 filter->vacation_ran=0;
2628 #endif
2629 filter->require_copy=0;
2630 filter->require_iascii_numeric=0;
2631
2632 if (parse_white(filter)==-1) return -1;
2633
2634 if (exec && filter->vacation_directory != NULL && filter_test == FTEST_NONE)
2635 {
2636 DIR *oncelogdir;
2637 struct dirent *oncelog;
2638 struct stat properties;
2639 time_t now;
2640
2641 /* clean up old vacation log databases */
2642
2643 oncelogdir=opendir(CS filter->vacation_directory);
2644
2645 if (oncelogdir ==(DIR*)0 && errno != ENOENT)
2646 {
2647 filter->errmsg=CUS "unable to open vacation directory";
2648 return -1;
2649 }
2650
2651 if (oncelogdir != NULL)
2652 {
2653 time(&now);
2654
2655 while ((oncelog=readdir(oncelogdir))!=(struct dirent*)0)
2656 {
2657 if (strlen(oncelog->d_name)==32)
2658 {
2659 uschar *s=string_sprintf("%s/%s",filter->vacation_directory,oncelog->d_name);
2660 if (Ustat(s,&properties)==0 && (properties.st_mtime+VACATION_MAX_DAYS*86400)<now)
2661 Uunlink(s);
2662 }
2663 }
2664 closedir(oncelogdir);
2665 }
2666 }
2667
2668 while (parse_identifier(filter,CUS "require"))
2669 {
2670 /*
2671 require-command = "require" <capabilities: string-list>
2672 */
2673
2674 struct String *cap,*check;
2675 int m;
2676
2677 if (parse_white(filter)==-1) return -1;
2678 if ((m=parse_stringlist(filter,&cap))!=1)
2679 {
2680 if (m==0) filter->errmsg=CUS "capability string list expected";
2681 return -1;
2682 }
2683 for (check=cap; check->character; ++check)
2684 {
2685 if (eq_octet(check,&str_envelope,0)) filter->require_envelope=1;
2686 else if (eq_octet(check,&str_fileinto,0)) filter->require_fileinto=1;
2687 #ifdef NOTIFY
2688 else if (eq_octet(check,&str_notify,0)) filter->require_notify=1;
2689 #endif
2690 #ifdef SUBADDRESS
2691 else if (eq_octet(check,&str_subaddress,0)) filter->require_subaddress=1;
2692 #endif
2693 #ifdef VACATION
2694 else if (eq_octet(check,&str_vacation,0))
2695 {
2696 if (filter_test == FTEST_NONE && filter->vacation_directory == NULL)
2697 {
2698 filter->errmsg=CUS "vacation disabled";
2699 return -1;
2700 }
2701 filter->require_vacation=1;
2702 }
2703 #endif
2704 else if (eq_octet(check,&str_copy,0)) filter->require_copy=1;
2705 else if (eq_octet(check,&str_comparator_ioctet,0)) ;
2706 else if (eq_octet(check,&str_comparator_iascii_casemap,0)) ;
2707 else if (eq_octet(check,&str_comparator_enascii_casemap,0)) ;
2708 else if (eq_octet(check,&str_comparator_iascii_numeric,0)) filter->require_iascii_numeric=1;
2709 else
2710 {
2711 filter->errmsg=CUS "unknown capability";
2712 return -1;
2713 }
2714 }
2715 if (parse_semicolon(filter)==-1) return -1;
2716 }
2717 if (parse_commands(filter,exec,generated)==-1) return -1;
2718 if (*filter->pc)
2719 {
2720 filter->errmsg=CUS "syntax error";
2721 return -1;
2722 }
2723 return 1;
2724 }
2725
2726
2727 /*************************************************
2728 * Interpret a sieve filter file *
2729 *************************************************/
2730
2731 /*
2732 Arguments:
2733 filter points to the entire file, read into store as a single string
2734 options controls whether various special things are allowed, and requests
2735 special actions (not currently used)
2736 sieve_vacation_directory where to store vacation "once" files
2737 useraddress string expression for :user part of address
2738 subaddress string expression for :subaddress part of address
2739 generated where to hang newly-generated addresses
2740 error where to pass back an error text
2741
2742 Returns: FF_DELIVERED success, a significant action was taken
2743 FF_NOTDELIVERED success, no significant action
2744 FF_DEFER defer requested
2745 FF_FAIL fail requested
2746 FF_FREEZE freeze requested
2747 FF_ERROR there was a problem
2748 */
2749
2750 int
2751 sieve_interpret(uschar *filter, int options, uschar *vacation_directory,
2752 uschar *useraddress, uschar *subaddress, address_item **generated, uschar **error)
2753 {
2754 struct Sieve sieve;
2755 int r;
2756 uschar *msg;
2757
2758 options = options; /* Keep picky compilers happy */
2759 error = error;
2760
2761 DEBUG(D_route) debug_printf("Sieve: start of processing\n");
2762 sieve.filter=filter;
2763
2764 if (vacation_directory == NULL)
2765 sieve.vacation_directory = NULL;
2766 else
2767 {
2768 sieve.vacation_directory=expand_string(vacation_directory);
2769 if (sieve.vacation_directory == NULL)
2770 {
2771 *error = string_sprintf("failed to expand \"%s\" "
2772 "(sieve_vacation_directory): %s", vacation_directory,
2773 expand_string_message);
2774 return FF_ERROR;
2775 }
2776 }
2777
2778 sieve.useraddress = useraddress == NULL ? CUS "$local_part_prefix$local_part$local_part_suffix" : useraddress;
2779 sieve.subaddress = subaddress;
2780
2781 #ifdef COMPILE_SYNTAX_CHECKER
2782 if (parse_start(&sieve,0,generated)==1)
2783 #else
2784 if (parse_start(&sieve,1,generated)==1)
2785 #endif
2786 {
2787 if (sieve.keep)
2788 {
2789 add_addr(generated,US"inbox",1,0,0,0);
2790 msg = string_sprintf("Implicit keep");
2791 r = FF_DELIVERED;
2792 }
2793 else
2794 {
2795 msg = string_sprintf("No implicit keep");
2796 r = FF_DELIVERED;
2797 }
2798 }
2799 else
2800 {
2801 msg = string_sprintf("Sieve error: %s in line %d",sieve.errmsg,sieve.line);
2802 #ifdef COMPILE_SYNTAX_CHECKER
2803 r = FF_ERROR;
2804 *error = msg;
2805 #else
2806 add_addr(generated,US"inbox",1,0,0,0);
2807 r = FF_DELIVERED;
2808 #endif
2809 }
2810
2811 #ifndef COMPILE_SYNTAX_CHECKER
2812 if (filter_test != FTEST_NONE) printf("%s\n", (const char*) msg);
2813 else debug_printf("%s\n", msg);
2814 #endif
2815
2816 DEBUG(D_route) debug_printf("Sieve: end of processing\n");
2817 return r;
2818 }
Unnamed repository; edit this file 'description' to name the repository.