1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
9 /* Functions for reading spool files. When compiling for a utility (eximon),
10 not all are needed, and some functionality can be cut out. */
17 #ifndef COMPILE_UTILITY
18 /*************************************************
19 * Open and lock data file *
20 *************************************************/
22 /* The data file is the one that is used for locking, because the header file
23 can get replaced during delivery because of header rewriting. The file has
24 to opened with write access so that we can get an exclusive lock, but in
25 fact it won't be written to. Just in case there's a major disaster (e.g.
26 overwriting some other file descriptor with the value of this one), open it
29 As called by deliver_message() (at least) we are operating as root.
31 Argument: the id of the message
32 Returns: fd if file successfully opened and locked, else -1
34 Side effect: message_subdir is set for the (possibly split) spool directory
38 spool_open_datafile(uschar *id)
44 /* If split_spool_directory is set, first look for the file in the appropriate
45 sub-directory of the input directory. If it is not found there, try the input
46 directory itself, to pick up leftovers from before the splitting. If split_
47 spool_directory is not set, first look in the main input directory. If it is
48 not found there, try the split sub-directory, in case it is left over from a
51 for (int i = 0; i < 2; i++)
56 set_subdir_str(message_subdir, id, i);
57 fname = spool_fname(US"input", message_subdir, id, US"-D");
58 DEBUG(D_deliver) debug_printf("Trying spool file %s\n", fname);
60 /* We protect against symlink attacks both in not propagating the
61 * file-descriptor to other processes as we exec, and also ensuring that we
62 * don't even open symlinks.
63 * No -D file inside the spool area should be a symlink.
65 if ((fd = Uopen(fname,
72 O_RDWR | O_APPEND, 0)) >= 0)
79 log_write(0, LOG_MAIN, "Spool%s%s file %s-D not found",
80 *queue_name ? US" Q=" : US"",
81 *queue_name ? queue_name : US"",
85 log_write(0, LOG_MAIN, "Spool error for %s: %s", fname, strerror(errno));
90 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
91 the file. We lock only the first line of the file (containing the message ID)
92 because this apparently is needed for running Exim under Cygwin. If the entire
93 file is locked in one process, a sub-process cannot access it, even when passed
94 an open file descriptor (at least, I think that's the Cygwin story). On real
95 Unix systems it doesn't make any difference as long as Exim is consistent in
99 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
102 lock_data.l_type = F_WRLCK;
103 lock_data.l_whence = SEEK_SET;
104 lock_data.l_start = 0;
105 lock_data.l_len = SPOOL_DATA_START_OFFSET;
107 if (fcntl(fd, F_SETLK, &lock_data) < 0)
109 log_write(L_skip_delivery, LOG_MAIN,
110 "Spool file for %s is locked (another process is handling this message)",
117 /* Get the size of the data; don't include the leading filename line
118 in the count, but add one for the newline before the data. */
120 if (fstat(fd, &statbuf) == 0)
122 message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
123 message_size = message_body_size + 1;
128 #endif /* COMPILE_UTILITY */
132 /*************************************************
133 * Read non-recipients tree from spool file *
134 *************************************************/
136 /* The tree of non-recipients is written to the spool file in a form that
137 makes it easy to read back into a tree. The format is as follows:
139 . Each node is preceded by two letter(Y/N) indicating whether it has left
140 or right children. There's one space after the two flags, before the name.
142 . The left subtree (if any) then follows, then the right subtree (if any).
144 This function is entered with the next input line in the buffer. Note we must
145 save the right flag before recursing with the same buffer.
147 Once the tree is read, we re-construct the balance fields by scanning the tree.
148 I forgot to write them out originally, and the compatible fix is to do it this
149 way. This initial local recursing function does the necessary.
154 Returns: maximum depth below the node, including the node itself
158 count_below(tree_node *node)
161 if (node == NULL) return 0;
162 nleft = count_below(node->left);
163 nright = count_below(node->right);
164 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
165 return 1 + ((nleft > nright)? nleft : nright);
168 /* This is the real function...
171 connect pointer to the root of the tree
172 f FILE to read data from
173 buffer contains next input line; further lines read into it
174 buffer_size size of the buffer
176 Returns: FALSE on format error
180 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
184 int n = Ustrlen(buffer);
185 BOOL right = buffer[1] == 'Y';
187 if (n < 5) return FALSE; /* malformed line */
188 buffer[n-1] = 0; /* Remove \n */
189 node = store_get(sizeof(tree_node) + n - 3, TRUE); /* rcpt names tainted */
191 Ustrcpy(node->name, buffer + 3);
192 node->data.ptr = NULL;
194 if (buffer[0] == 'Y')
196 if (Ufgets(buffer, buffer_size, f) == NULL ||
197 !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
200 else node->left = NULL;
204 if (Ufgets(buffer, buffer_size, f) == NULL ||
205 !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
208 else node->right = NULL;
210 (void) count_below(*connect);
217 /* Reset all the global variables to their default values. However, there is
218 one exception. DO NOT change the default value of dont_deliver, because it may
219 be forced by an external setting. */
222 spool_clear_header_globals(void)
224 acl_var_c = acl_var_m = NULL;
225 authenticated_id = NULL;
226 authenticated_sender = NULL;
227 f.allow_unqualified_recipient = FALSE;
228 f.allow_unqualified_sender = FALSE;
231 f.deliver_firsttime = FALSE;
232 f.deliver_freeze = FALSE;
233 deliver_frozen_at = 0;
234 f.deliver_manual_thaw = FALSE;
235 /* f.dont_deliver must NOT be reset */
236 header_list = header_last = NULL;
237 host_lookup_deferred = FALSE;
238 host_lookup_failed = FALSE;
239 interface_address = NULL;
241 f.local_error_message = FALSE;
242 #ifdef HAVE_LOCAL_SCAN
243 local_scan_data = NULL;
245 max_received_linelength = 0;
246 message_linecount = 0;
247 received_protocol = NULL;
249 recipients_list = NULL;
250 sender_address = NULL;
251 sender_fullhost = NULL;
252 sender_helo_name = NULL;
253 sender_host_address = NULL;
254 sender_host_name = NULL;
255 sender_host_port = 0;
256 sender_host_authenticated = NULL;
258 f.sender_local = FALSE;
259 f.sender_set_untrusted = FALSE;
260 smtp_active_hostname = primary_hostname;
261 #ifndef COMPILE_UTILITY
262 f.spool_file_wireformat = FALSE;
264 tree_nonrecipients = NULL;
266 #ifdef EXPERIMENTAL_BRIGHTMAIL
273 f.dkim_disable_verify = FALSE;
274 dkim_collect_input = 0;
278 tls_in.certificate_verified = FALSE;
280 tls_in.dane_verified = FALSE;
282 tls_in.ver = tls_in.cipher = NULL;
283 # ifndef COMPILE_UTILITY /* tls support fns not built in */
284 tls_free_cert(&tls_in.ourcert);
285 tls_free_cert(&tls_in.peercert);
287 tls_in.peerdn = NULL;
289 tls_in.ocsp = OCSP_NOT_REQ;
292 #ifdef WITH_CONTENT_SCAN
295 spam_score_int = NULL;
298 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
299 message_smtputf8 = FALSE;
300 message_utf8_downconvert = 0;
308 /*************************************************
309 * Read spool header file *
310 *************************************************/
312 /* This function reads a spool header file and places the data into the
313 appropriate global variables. The header portion is always read, but header
314 structures are built only if read_headers is set true. It isn't, for example,
315 while generating -bp output.
317 It may be possible for blocks of nulls (binary zeroes) to get written on the
318 end of a file if there is a system crash during writing. It was observed on an
319 earlier version of Exim that omitted to fsync() the files - this is thought to
320 have been the cause of that incident, but in any case, this code must be robust
321 against such an event, and if such a file is encountered, it must be treated as
324 As called from deliver_message() (at least) we are running as root.
327 name name of the header file, including the -H
328 read_headers TRUE if in-store header structures are to be built
329 subdir_set TRUE is message_subdir is already set
331 Returns: spool_read_OK success
332 spool_read_notopen open failed
333 spool_read_enverror error in the envelope portion
334 spool_read_hdrerror error in the header portion
338 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
344 BOOL inheader = FALSE;
346 /* Reset all the global variables to their default values. However, there is
347 one exception. DO NOT change the default value of dont_deliver, because it may
348 be forced by an external setting. */
350 spool_clear_header_globals();
352 /* Generate the full name and open the file. If message_subdir is already
353 set, just look in the given directory. Otherwise, look in both the split
354 and unsplit directories, as for the data file above. */
356 for (int n = 0; n < 2; n++)
359 set_subdir_str(message_subdir, name, n);
361 if ((fp = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
363 if (n != 0 || subdir_set || errno != ENOENT)
364 return spool_read_notopen;
369 #ifndef COMPILE_UTILITY
370 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
371 #endif /* COMPILE_UTILITY */
373 /* The first line of a spool file contains the message id followed by -H (i.e.
374 the file name), in order to make the file self-identifying. */
376 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
377 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
378 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
379 goto SPOOL_FORMAT_ERROR;
381 /* The next three lines in the header file are in a fixed format. The first
382 contains the login, uid, and gid of the user who caused the file to be written.
383 There are known cases where a negative gid is used, so we allow for both
384 negative uids and gids. The second contains the mail address of the message's
385 sender, enclosed in <>. The third contains the time the message was received,
386 and the number of warning messages for delivery delays that have been sent. */
388 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
391 uschar *p = big_buffer + Ustrlen(big_buffer);
392 while (p > big_buffer && isspace(p[-1])) p--;
394 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
395 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
397 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
399 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
400 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
402 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
406 originator_login = string_copy(big_buffer);
407 originator_uid = (uid_t)uid;
408 originator_gid = (gid_t)gid;
411 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
412 n = Ustrlen(big_buffer);
413 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
414 goto SPOOL_FORMAT_ERROR;
416 sender_address = store_get(n-2, TRUE); /* tainted */
417 Ustrncpy(sender_address, big_buffer+1, n-3);
418 sender_address[n-3] = 0;
421 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
422 if (sscanf(CS big_buffer, TIME_T_FMT " %d", &received_time.tv_sec, &warning_count) != 2)
423 goto SPOOL_FORMAT_ERROR;
424 received_time.tv_usec = 0;
426 message_age = time(NULL) - received_time.tv_sec;
427 #ifndef COMPILE_UTILITY
428 if (f.running_in_test_harness)
429 message_age = test_harness_fudged_queue_time(message_age);
432 #ifndef COMPILE_UTILITY
433 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
434 originator_login, (long int)originator_uid, (long int)originator_gid,
438 /* Now there may be a number of optional lines, each starting with "-". If you
439 add a new setting here, make sure you set the default above.
441 Because there are now quite a number of different possibilities, we use a
442 switch on the first character to avoid too many failing tests. Thanks to Nico
443 Erfurth for the patch that implemented this. I have made it even more efficient
444 by not re-scanning the first two characters.
446 To allow new versions of Exim that add additional flags to interwork with older
447 versions that do not understand them, just ignore any lines starting with "-"
448 that we don't recognize. Otherwise it wouldn't be possible to back off a new
449 version that left new-style flags written on the spool.
451 If the line starts with "--" the content of the variable is tainted. */
460 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
461 if (big_buffer[0] != '-') break;
462 while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
463 && big_buffer[len-1] != '\n'
465 { /* buffer not big enough for line; certs make this possible */
467 if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
468 buf = store_get_perm(big_buffer_size *= 2, FALSE);
469 memcpy(buf, big_buffer, --len);
471 if (Ufgets(big_buffer+len, big_buffer_size-len, fp) == NULL)
472 goto SPOOL_READ_ERROR;
474 big_buffer[len-1] = 0;
476 tainted = big_buffer[1] == '-';
477 var = big_buffer + (tainted ? 2 : 1);
484 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
485 variable, because Exim allows any number of them, with arbitrary names.
486 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
489 if (Ustrncmp(p, "clc ", 4) == 0 ||
490 Ustrncmp(p, "clm ", 4) == 0)
492 uschar *name, *endptr;
495 endptr = Ustrchr(var + 5, ' ');
496 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
497 name = string_sprintf("%c%.*s", var[3],
498 (int)(endptr - var - 5), var + 5);
499 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
500 node = acl_var_create(name);
501 node->data.ptr = store_get(count + 1, tainted);
502 if (fread(node->data.ptr, 1, count+1, fp) < count) goto SPOOL_READ_ERROR;
503 ((uschar*)node->data.ptr)[count] = 0;
506 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
507 f.allow_unqualified_recipient = TRUE;
508 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
509 f.allow_unqualified_sender = TRUE;
511 else if (Ustrncmp(p, "uth_id", 6) == 0)
512 authenticated_id = string_copy_taint(var + 8, tainted);
513 else if (Ustrncmp(p, "uth_sender", 10) == 0)
514 authenticated_sender = string_copy_taint(var + 12, tainted);
515 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
516 smtp_active_hostname = string_copy_taint(var + 16, tainted);
518 /* For long-term backward compatibility, we recognize "-acl", which was
519 used before the number of ACL variables changed from 10 to 20. This was
520 before the subsequent change to an arbitrary number of named variables.
521 This code is retained so that upgrades from very old versions can still
522 handle old-format spool files. The value given after "-acl" is a number
523 that is 0-9 for connection variables, and 10-19 for message variables. */
525 else if (Ustrncmp(p, "cl ", 3) == 0)
527 unsigned index, count;
528 uschar name[20]; /* Need plenty of space for %u format */
530 if ( sscanf(CS var + 4, "%u %u", &index, &count) != 2
532 || count > 16384 /* arbitrary limit on variable size */
534 goto SPOOL_FORMAT_ERROR;
536 (void) string_format(name, sizeof(name), "%c%u", 'c', index);
538 (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
539 node = acl_var_create(name);
540 node->data.ptr = store_get(count + 1, tainted);
541 /* We sanity-checked the count, so disable the Coverity error */
542 /* coverity[tainted_data] */
543 if (fread(node->data.ptr, 1, count+1, fp) < count) goto SPOOL_READ_ERROR;
544 (US node->data.ptr)[count] = '\0';
549 if (Ustrncmp(p, "ody_linecount", 13) == 0)
550 body_linecount = Uatoi(var + 14);
551 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
552 body_zerocount = Uatoi(var + 14);
553 #ifdef EXPERIMENTAL_BRIGHTMAIL
554 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
555 bmi_verdicts = string_copy_taint(var + 13, tainted);
560 if (Ustrcmp(p, "eliver_firsttime") == 0)
561 f.deliver_firsttime = TRUE;
562 /* Check if the dsn flags have been set in the header file */
563 else if (Ustrncmp(p, "sn_ret", 6) == 0)
564 dsn_ret= atoi(CS var + 7);
565 else if (Ustrncmp(p, "sn_envid", 8) == 0)
566 dsn_envid = string_copy_taint(var + 10, tainted);
570 if (Ustrncmp(p, "rozen", 5) == 0)
572 f.deliver_freeze = TRUE;
573 if (sscanf(CS var+6, TIME_T_FMT, &deliver_frozen_at) != 1)
574 goto SPOOL_READ_ERROR;
579 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
580 host_lookup_deferred = TRUE;
581 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
582 host_lookup_failed = TRUE;
583 else if (Ustrncmp(p, "ost_auth", 8) == 0)
584 sender_host_authenticated = string_copy_taint(var + 10, tainted);
585 else if (Ustrncmp(p, "ost_name", 8) == 0)
586 sender_host_name = string_copy_taint(var + 10, tainted);
587 else if (Ustrncmp(p, "elo_name", 8) == 0)
588 sender_helo_name = string_copy_taint(var + 10, tainted);
590 /* We now record the port number after the address, separated by a
591 dot. For compatibility during upgrading, do nothing if there
592 isn't a value (it gets left at zero). */
594 else if (Ustrncmp(p, "ost_address", 11) == 0)
596 sender_host_port = host_address_extract_port(var + 13);
597 sender_host_address = string_copy_taint(var + 13, tainted);
602 if (Ustrncmp(p, "nterface_address", 16) == 0)
604 interface_port = host_address_extract_port(var + 18);
605 interface_address = string_copy_taint(var + 18, tainted);
607 else if (Ustrncmp(p, "dent", 4) == 0)
608 sender_ident = string_copy_taint(var + 6, tainted);
612 if (Ustrcmp(p, "ocal") == 0)
613 f.sender_local = TRUE;
614 else if (Ustrcmp(var, "localerror") == 0)
615 f.local_error_message = TRUE;
616 #ifdef HAVE_LOCAL_SCAN
617 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
618 local_scan_data = string_copy_taint(var + 11, tainted);
623 if (Ustrcmp(p, "anual_thaw") == 0)
624 f.deliver_manual_thaw = TRUE;
625 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
626 max_received_linelength = Uatoi(var + 23);
630 if (*p == 0) f.dont_deliver = TRUE; /* -N */
634 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
635 received_protocol = string_copy_taint(var + 18, tainted);
636 else if (Ustrncmp(p, "eceived_time_usec", 17) == 0)
639 if (sscanf(CS var + 20, "%u", &usec) == 1)
640 received_time.tv_usec = usec;
645 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
646 f.sender_set_untrusted = TRUE;
647 #ifdef WITH_CONTENT_SCAN
648 else if (Ustrncmp(p, "pam_bar ", 8) == 0)
649 spam_bar = string_copy_taint(var + 9, tainted);
650 else if (Ustrncmp(p, "pam_score ", 10) == 0)
651 spam_score = string_copy_taint(var + 11, tainted);
652 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
653 spam_score_int = string_copy_taint(var + 15, tainted);
655 #ifndef COMPILE_UTILITY
656 else if (Ustrncmp(p, "pool_file_wireformat", 20) == 0)
657 f.spool_file_wireformat = TRUE;
659 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
660 else if (Ustrncmp(p, "mtputf8", 7) == 0)
661 message_smtputf8 = TRUE;
667 if (Ustrncmp(p, "ls_", 3) == 0)
669 const uschar * q = p + 3;
670 if (Ustrncmp(q, "certificate_verified", 20) == 0)
671 tls_in.certificate_verified = TRUE;
672 else if (Ustrncmp(q, "cipher", 6) == 0)
673 tls_in.cipher = string_copy_taint(q+7, tainted);
674 # ifndef COMPILE_UTILITY /* tls support fns not built in */
675 else if (Ustrncmp(q, "ourcert", 7) == 0)
676 (void) tls_import_cert(q+8, &tls_in.ourcert);
677 else if (Ustrncmp(q, "peercert", 8) == 0)
678 (void) tls_import_cert(q+9, &tls_in.peercert);
680 else if (Ustrncmp(q, "peerdn", 6) == 0)
681 tls_in.peerdn = string_unprinting(string_copy_taint(q+7, tainted));
682 else if (Ustrncmp(q, "sni", 3) == 0)
683 tls_in.sni = string_unprinting(string_copy_taint(q+4, tainted));
684 else if (Ustrncmp(q, "ocsp", 4) == 0)
685 tls_in.ocsp = q[5] - '0';
686 # ifdef EXPERIMENTAL_TLS_RESUME
687 else if (Ustrncmp(q, "resumption", 10) == 0)
688 tls_in.resumption = q[11] - 'A';
690 else if (Ustrncmp(q, "ver", 3) == 0)
691 tls_in.ver = string_copy_taint(q+4, tainted);
696 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
698 if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
699 message_utf8_downconvert = 1;
700 else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
701 message_utf8_downconvert = -1;
705 default: /* Present because some compilers complain if all */
706 break; /* possibilities are not covered. */
710 /* Build sender_fullhost if required */
712 #ifndef COMPILE_UTILITY
713 host_build_sender_fullhost();
714 #endif /* COMPILE_UTILITY */
716 #ifndef COMPILE_UTILITY
718 debug_printf("sender_local=%d ident=%s\n", f.sender_local,
719 sender_ident ? sender_ident : US"unset");
720 #endif /* COMPILE_UTILITY */
722 /* We now have the tree of addresses NOT to deliver to, or a line
723 containing "XX", indicating no tree. */
725 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
726 !read_nonrecipients_tree(&tree_nonrecipients, fp, big_buffer, big_buffer_size))
727 goto SPOOL_FORMAT_ERROR;
729 #ifndef COMPILE_UTILITY
732 debug_printf("Non-recipients:\n");
733 debug_print_tree(tree_nonrecipients);
735 #endif /* COMPILE_UTILITY */
737 /* After reading the tree, the next line has not yet been read into the
738 buffer. It contains the count of recipients which follow on separate lines.
739 Apply an arbitrary sanity check.*/
741 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
742 if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
743 goto SPOOL_FORMAT_ERROR;
745 #ifndef COMPILE_UTILITY
746 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
747 #endif /* COMPILE_UTILITY */
749 recipients_list_max = rcount;
750 recipients_list = store_get(rcount * sizeof(recipient_item), FALSE);
752 /* We sanitised the count and know we have enough memory, so disable
753 the Coverity error on recipients_count */
754 /* coverity[tainted_data] */
756 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
761 uschar *orcpt = NULL;
762 uschar *errors_to = NULL;
765 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
766 nn = Ustrlen(big_buffer);
767 if (nn < 2) goto SPOOL_FORMAT_ERROR;
769 /* Remove the newline; this terminates the address if there is no additional
772 p = big_buffer + nn - 1;
775 /* Look back from the end of the line for digits and special terminators.
776 Since an address must end with a domain, we can tell that extra data is
777 present by the presence of the terminator, which is always some character
778 that cannot exist in a domain. (If I'd thought of the need for additional
779 data early on, I'd have put it at the start, with the address at the end. As
780 it is, we have to operate backwards. Addresses are permitted to contain
783 This code has to cope with various versions of this data that have evolved
784 over time. In all cases, the line might just contain an address, with no
785 additional data. Otherwise, the possibilities are as follows:
787 Exim 3 type: <address><space><digits>,<digits>,<digits>
789 The second set of digits is the parent number for one_time addresses. The
790 other values were remnants of earlier experiments that were abandoned.
792 Exim 4 first type: <address><space><digits>
794 The digits are the parent number for one_time addresses.
796 Exim 4 new type: <address><space><data>#<type bits>
798 The type bits indicate what the contents of the data are.
800 Bit 01 indicates that, reading from right to left, the data
801 ends with <errors_to address><space><len>,<pno> where pno is
802 the parent number for one_time addresses, and len is the length
803 of the errors_to address (zero meaning none).
805 Bit 02 indicates that, again reading from right to left, the data continues
806 with orcpt len(orcpt),dsn_flags
809 while (isdigit(*p)) p--;
811 /* Handle Exim 3 spool files */
816 #if !defined (COMPILE_UTILITY)
817 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 3 spool file\n");
819 while (isdigit(*(--p)) || *p == ',');
823 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
827 /* Handle early Exim 4 spool files */
831 #if !defined (COMPILE_UTILITY)
832 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - early Exim 4 spool file\n");
835 (void)sscanf(CS p, "%d", &pno);
838 /* Handle current format Exim 4 spool files */
844 #if !defined (COMPILE_UTILITY)
845 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim standard format spoolfile\n");
848 (void)sscanf(CS p+1, "%d", &flags);
850 if ((flags & 0x01) != 0) /* one_time data exists */
853 while (isdigit(*(--p)) || *p == ',' || *p == '-');
854 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
859 errors_to = string_copy_taint(p, TRUE);
863 *(--p) = 0; /* Terminate address */
864 if ((flags & 0x02) != 0) /* one_time data exists */
867 while (isdigit(*(--p)) || *p == ',' || *p == '-');
868 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
873 orcpt = string_copy_taint(p, TRUE);
877 *(--p) = 0; /* Terminate address */
879 #if !defined(COMPILE_UTILITY)
881 { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
883 if (orcpt || dsn_flags)
884 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: <%s> orcpt: <%s> dsn_flags: 0x%x\n",
885 big_buffer, orcpt, dsn_flags);
887 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: <%s> errorsto: <%s>\n",
888 big_buffer, errors_to);
891 recipients_list[recipients_count].address = string_copy_taint(big_buffer, TRUE);
892 recipients_list[recipients_count].pno = pno;
893 recipients_list[recipients_count].errors_to = errors_to;
894 recipients_list[recipients_count].orcpt = orcpt;
895 recipients_list[recipients_count].dsn_flags = dsn_flags;
898 /* The remainder of the spool header file contains the headers for the message,
899 separated off from the previous data by a blank line. Each header is preceded
900 by a count of its length and either a certain letter (for various identified
901 headers), space (for a miscellaneous live header) or an asterisk (for a header
902 that has been rewritten). Count the Received: headers. We read the headers
903 always, in order to check on the format of the file, but only create a header
904 list if requested to do so. */
907 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
908 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
910 while ((n = fgetc(fp)) != EOF)
916 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
917 if(ungetc(n, fp) == EOF || fscanf(fp, "%d%c ", &n, flag) == EOF)
918 goto SPOOL_READ_ERROR;
919 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
923 h = store_get(sizeof(header_line), FALSE);
927 h->text = store_get(n+1, TRUE); /* tainted */
929 if (h->type == htype_received) received_count++;
931 if (header_list) header_last->next = h;
932 else header_list = h;
935 for (i = 0; i < n; i++)
938 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
939 if (c == '\n' && h->type != htype_old) message_linecount++;
945 /* Not requiring header data, just skip through the bytes */
947 else for (i = 0; i < n; i++)
950 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
954 /* We have successfully read the data in the header file. Update the message
955 line count by adding the body linecount to the header linecount. Close the file
956 and give a positive response. */
958 #ifndef COMPILE_UTILITY
959 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
960 body_linecount, message_linecount);
961 #endif /* COMPILE_UTILITY */
963 message_linecount += body_linecount;
966 return spool_read_OK;
969 /* There was an error reading the spool or there was missing data,
970 or there was a format error. A "read error" with no errno means an
971 unexpected EOF, which we treat as a format error. */
978 #ifndef COMPILE_UTILITY
979 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
980 #endif /* COMPILE_UTILITY */
984 return inheader ? spool_read_hdrerror : spool_read_enverror;
989 #ifndef COMPILE_UTILITY
990 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
991 #endif /* COMPILE_UTILITY */
994 errno = ERRNO_SPOOLFORMAT;
995 return inheader? spool_read_hdrerror : spool_read_enverror;
1000 /* End of spool_in.c */