Don't open spool data-files which are symlinks
[exim.git] / src / src / spool_in.c
CommitLineData
059ec3d9
PH
1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
f9ba5e22 5/* Copyright (c) University of Cambridge 1995 - 2018 */
059ec3d9
PH
6/* See the file NOTICE for conditions of use and distribution. */
7
8/* Functions for reading spool files. When compiling for a utility (eximon),
9not all are needed, and some functionality can be cut out. */
10
11
12#include "exim.h"
13
14
15
16#ifndef COMPILE_UTILITY
17/*************************************************
18* Open and lock data file *
19*************************************************/
20
21/* The data file is the one that is used for locking, because the header file
22can get replaced during delivery because of header rewriting. The file has
23to opened with write access so that we can get an exclusive lock, but in
24fact it won't be written to. Just in case there's a major disaster (e.g.
25overwriting some other file descriptor with the value of this one), open it
26with append.
27
92b0827a
JH
28As called by deliver_message() (at least) we are operating as root.
29
059ec3d9 30Argument: the id of the message
789f8a4f 31Returns: fd if file successfully opened and locked, else -1
059ec3d9 32
789f8a4f 33Side effect: message_subdir is set for the (possibly split) spool directory
059ec3d9
PH
34*/
35
789f8a4f 36int
059ec3d9
PH
37spool_open_datafile(uschar *id)
38{
39int i;
40struct stat statbuf;
41flock_t lock_data;
789f8a4f 42int fd;
059ec3d9
PH
43
44/* If split_spool_directory is set, first look for the file in the appropriate
45sub-directory of the input directory. If it is not found there, try the input
46directory itself, to pick up leftovers from before the splitting. If split_
47spool_directory is not set, first look in the main input directory. If it is
48not found there, try the split sub-directory, in case it is left over from a
49splitting state. */
50
51for (i = 0; i < 2; i++)
52 {
41313d92 53 uschar * fname;
059ec3d9 54 int save_errno;
9befa1ca 55
4dc2379a 56 message_subdir[0] = split_spool_directory == i ? '\0' : id[5];
41313d92
JH
57 fname = spool_fname(US"input", message_subdir, id, US"-D");
58 DEBUG(D_deliver) debug_printf("Trying spool file %s\n", fname);
a2da3176 59
85defcf0
PP
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.
64 */
92b0827a
JH
65 if ((fd = Uopen(fname,
66#ifdef O_CLOEXEC
67 O_CLOEXEC |
68#endif
85defcf0
PP
69#ifdef O_NOFOLLOW
70 O_NOFOLLOW |
71#endif
92b0827a 72 O_RDWR | O_APPEND, 0)) >= 0)
789f8a4f 73 break;
059ec3d9
PH
74 save_errno = errno;
75 if (errno == ENOENT)
76 {
77 if (i == 0) continue;
78 if (!queue_running)
9befa1ca 79 log_write(0, LOG_MAIN, "Spool%s%s file %s-D not found",
12cf7615
JH
80 *queue_name ? US" Q=" : US"",
81 *queue_name ? queue_name : US"",
9befa1ca 82 id);
059ec3d9 83 }
9befa1ca
JH
84 else
85 log_write(0, LOG_MAIN, "Spool error for %s: %s", fname, strerror(errno));
059ec3d9 86 errno = save_errno;
789f8a4f 87 return -1;
059ec3d9
PH
88 }
89
90/* File is open and message_subdir is set. Set the close-on-exec flag, and lock
91the file. We lock only the first line of the file (containing the message ID)
92because this apparently is needed for running Exim under Cygwin. If the entire
93file is locked in one process, a sub-process cannot access it, even when passed
94an open file descriptor (at least, I think that's the Cygwin story). On real
95Unix systems it doesn't make any difference as long as Exim is consistent in
96what it locks. */
97
92b0827a
JH
98#ifndef O_CLOEXEC
99(void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
100#endif
059ec3d9
PH
101
102lock_data.l_type = F_WRLCK;
103lock_data.l_whence = SEEK_SET;
104lock_data.l_start = 0;
105lock_data.l_len = SPOOL_DATA_START_OFFSET;
106
789f8a4f 107if (fcntl(fd, F_SETLK, &lock_data) < 0)
059ec3d9
PH
108 {
109 log_write(L_skip_delivery,
110 LOG_MAIN,
111 "Spool file is locked (another process is handling this message)");
789f8a4f 112 (void)close(fd);
059ec3d9 113 errno = 0;
789f8a4f 114 return -1;
059ec3d9
PH
115 }
116
117/* Get the size of the data; don't include the leading filename line
118in the count, but add one for the newline before the data. */
119
789f8a4f 120if (fstat(fd, &statbuf) == 0)
059ec3d9
PH
121 {
122 message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
123 message_size = message_body_size + 1;
124 }
125
789f8a4f 126return fd;
059ec3d9
PH
127}
128#endif /* COMPILE_UTILITY */
129
130
131
132/*************************************************
133* Read non-recipients tree from spool file *
134*************************************************/
135
136/* The tree of non-recipients is written to the spool file in a form that
137makes it easy to read back into a tree. The format is as follows:
138
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.
141
142 . The left subtree (if any) then follows, then the right subtree (if any).
143
144This function is entered with the next input line in the buffer. Note we must
145save the right flag before recursing with the same buffer.
146
147Once the tree is read, we re-construct the balance fields by scanning the tree.
148I forgot to write them out originally, and the compatible fix is to do it this
149way. This initial local recursing function does the necessary.
150
151Arguments:
152 node tree node
153
154Returns: maximum depth below the node, including the node itself
155*/
156
157static int
158count_below(tree_node *node)
159{
160int nleft, nright;
161if (node == NULL) return 0;
162nleft = count_below(node->left);
163nright = count_below(node->right);
164node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
165return 1 + ((nleft > nright)? nleft : nright);
166}
167
168/* This is the real function...
169
170Arguments:
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
175
176Returns: FALSE on format error
177*/
178
179static BOOL
180read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
181 int buffer_size)
182{
183tree_node *node;
184int n = Ustrlen(buffer);
185BOOL right = buffer[1] == 'Y';
186
187if (n < 5) return FALSE; /* malformed line */
188buffer[n-1] = 0; /* Remove \n */
189node = store_get(sizeof(tree_node) + n - 3);
190*connect = node;
191Ustrcpy(node->name, buffer + 3);
192node->data.ptr = NULL;
193
194if (buffer[0] == 'Y')
195 {
196 if (Ufgets(buffer, buffer_size, f) == NULL ||
197 !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
198 return FALSE;
199 }
200else node->left = NULL;
201
202if (right)
203 {
204 if (Ufgets(buffer, buffer_size, f) == NULL ||
205 !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
206 return FALSE;
207 }
208else node->right = NULL;
209
210(void) count_below(*connect);
211return TRUE;
212}
213
214
215
216
059ec3d9
PH
217/* Reset all the global variables to their default values. However, there is
218one exception. DO NOT change the default value of dont_deliver, because it may
219be forced by an external setting. */
220
4b4856ff
JH
221void
222spool_clear_header_globals(void)
223{
38a0a95f 224acl_var_c = acl_var_m = NULL;
059ec3d9
PH
225authenticated_id = NULL;
226authenticated_sender = NULL;
227allow_unqualified_recipient = FALSE;
228allow_unqualified_sender = FALSE;
229body_linecount = 0;
230body_zerocount = 0;
231deliver_firsttime = FALSE;
232deliver_freeze = FALSE;
233deliver_frozen_at = 0;
234deliver_manual_thaw = FALSE;
235/* dont_deliver must NOT be reset */
236header_list = header_last = NULL;
b08b24c8 237host_lookup_deferred = FALSE;
059ec3d9
PH
238host_lookup_failed = FALSE;
239interface_address = NULL;
240interface_port = 0;
241local_error_message = FALSE;
9723f966 242#ifdef HAVE_LOCAL_SCAN
059ec3d9 243local_scan_data = NULL;
9723f966 244#endif
d677b2f2 245max_received_linelength = 0;
059ec3d9
PH
246message_linecount = 0;
247received_protocol = NULL;
248received_count = 0;
249recipients_list = NULL;
250sender_address = NULL;
251sender_fullhost = NULL;
252sender_helo_name = NULL;
253sender_host_address = NULL;
254sender_host_name = NULL;
255sender_host_port = 0;
256sender_host_authenticated = NULL;
257sender_ident = NULL;
258sender_local = FALSE;
259sender_set_untrusted = FALSE;
1f5b4c3d 260smtp_active_hostname = primary_hostname;
328c5688
JH
261#ifndef COMPILE_UTILITY
262spool_file_wireformat = FALSE;
263#endif
059ec3d9
PH
264tree_nonrecipients = NULL;
265
8523533c
TK
266#ifdef EXPERIMENTAL_BRIGHTMAIL
267bmi_run = 0;
268bmi_verdicts = NULL;
269#endif
270
80a47a2c 271#ifndef DISABLE_DKIM
9e5d6b55 272dkim_signers = NULL;
80a47a2c 273dkim_disable_verify = FALSE;
64b67b65 274dkim_collect_input = 0;
f7572e5a
TK
275#endif
276
059ec3d9 277#ifdef SUPPORT_TLS
817d9f57 278tls_in.certificate_verified = FALSE;
c0635b6d 279# ifdef SUPPORT_DANE
53a7196b
JH
280tls_in.dane_verified = FALSE;
281# endif
817d9f57 282tls_in.cipher = NULL;
790fbb71
JH
283# ifndef COMPILE_UTILITY /* tls support fns not built in */
284tls_free_cert(&tls_in.ourcert);
285tls_free_cert(&tls_in.peercert);
286# endif
817d9f57
JH
287tls_in.peerdn = NULL;
288tls_in.sni = NULL;
44662487 289tls_in.ocsp = OCSP_NOT_REQ;
7be682ca 290#endif
059ec3d9 291
8523533c 292#ifdef WITH_CONTENT_SCAN
3481c572
JH
293spam_bar = NULL;
294spam_score = NULL;
8523533c
TK
295spam_score_int = NULL;
296#endif
297
8c5d388a 298#if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
7ade712c 299message_smtputf8 = FALSE;
3c8b3577 300message_utf8_downconvert = 0;
7ade712c
JH
301#endif
302
6c1c3d1d
WB
303dsn_ret = 0;
304dsn_envid = NULL;
4b4856ff
JH
305}
306
307
308/*************************************************
309* Read spool header file *
310*************************************************/
311
312/* This function reads a spool header file and places the data into the
313appropriate global variables. The header portion is always read, but header
314structures are built only if read_headers is set true. It isn't, for example,
315while generating -bp output.
316
317It may be possible for blocks of nulls (binary zeroes) to get written on the
318end of a file if there is a system crash during writing. It was observed on an
319earlier version of Exim that omitted to fsync() the files - this is thought to
320have been the cause of that incident, but in any case, this code must be robust
321against such an event, and if such a file is encountered, it must be treated as
322malformed.
323
324As called from deliver_message() (at least) we are running as root.
325
326Arguments:
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
330
331Returns: 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
335*/
336
337int
338spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
339{
340FILE *f = NULL;
341int n;
342int rcount = 0;
343long int uid, gid;
344BOOL inheader = FALSE;
345uschar *p;
346
347/* Reset all the global variables to their default values. However, there is
348one exception. DO NOT change the default value of dont_deliver, because it may
349be forced by an external setting. */
350
351spool_clear_header_globals();
6c1c3d1d 352
059ec3d9
PH
353/* Generate the full name and open the file. If message_subdir is already
354set, just look in the given directory. Otherwise, look in both the split
355and unsplit directories, as for the data file above. */
356
357for (n = 0; n < 2; n++)
358 {
359 if (!subdir_set)
a2da3176 360 message_subdir[0] = split_spool_directory == (n == 0) ? name[5] : 0;
41313d92
JH
361
362 if ((f = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
363 break;
364 if (n != 0 || subdir_set || errno != ENOENT)
365 return spool_read_notopen;
059ec3d9
PH
366 }
367
368errno = 0;
369
370#ifndef COMPILE_UTILITY
371DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
372#endif /* COMPILE_UTILITY */
373
374/* The first line of a spool file contains the message id followed by -H (i.e.
375the file name), in order to make the file self-identifying. */
376
377if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
378if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
379 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
380 goto SPOOL_FORMAT_ERROR;
381
382/* The next three lines in the header file are in a fixed format. The first
383contains the login, uid, and gid of the user who caused the file to be written.
ebb6e6d5
PH
384There are known cases where a negative gid is used, so we allow for both
385negative uids and gids. The second contains the mail address of the message's
386sender, enclosed in <>. The third contains the time the message was received,
387and the number of warning messages for delivery delays that have been sent. */
059ec3d9
PH
388
389if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
390
1e70f85b
PH
391p = big_buffer + Ustrlen(big_buffer);
392while (p > big_buffer && isspace(p[-1])) p--;
393*p = 0;
394if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
ebb6e6d5 395while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
1e70f85b
PH
396gid = Uatoi(p);
397if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
398*p = 0;
399if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
ebb6e6d5 400while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
1e70f85b
PH
401uid = Uatoi(p);
402if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
403*p = 0;
8e669ac1 404
1e70f85b 405originator_login = string_copy(big_buffer);
059ec3d9
PH
406originator_uid = (uid_t)uid;
407originator_gid = (gid_t)gid;
408
e91ad4a7 409/* envelope from */
059ec3d9
PH
410if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
411n = Ustrlen(big_buffer);
412if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
413 goto SPOOL_FORMAT_ERROR;
414
415sender_address = store_get(n-2);
416Ustrncpy(sender_address, big_buffer+1, n-3);
417sender_address[n-3] = 0;
418
e91ad4a7 419/* time */
059ec3d9 420if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
32dfdf8b 421if (sscanf(CS big_buffer, TIME_T_FMT " %d", &received_time.tv_sec, &warning_count) != 2)
059ec3d9 422 goto SPOOL_FORMAT_ERROR;
32dfdf8b 423received_time.tv_usec = 0;
059ec3d9 424
32dfdf8b 425message_age = time(NULL) - received_time.tv_sec;
059ec3d9
PH
426
427#ifndef COMPILE_UTILITY
428DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
429 originator_login, (long int)originator_uid, (long int)originator_gid,
430 sender_address);
431#endif /* COMPILE_UTILITY */
432
08955dd3
PH
433/* Now there may be a number of optional lines, each starting with "-". If you
434add a new setting here, make sure you set the default above.
059ec3d9 435
08955dd3
PH
436Because there are now quite a number of different possibilities, we use a
437switch on the first character to avoid too many failing tests. Thanks to Nico
438Erfurth for the patch that implemented this. I have made it even more efficient
439by not re-scanning the first two characters.
440
441To allow new versions of Exim that add additional flags to interwork with older
442versions that do not understand them, just ignore any lines starting with "-"
443that we don't recognize. Otherwise it wouldn't be possible to back off a new
444version that left new-style flags written on the spool. */
445
446p = big_buffer + 2;
059ec3d9
PH
447for (;;)
448 {
e91ad4a7 449 int len;
059ec3d9
PH
450 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
451 if (big_buffer[0] != '-') break;
e91ad4a7
JH
452 while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
453 && big_buffer[len-1] != '\n'
454 )
455 { /* buffer not big enough for line; certs make this possible */
456 uschar * buf;
457 if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
458 buf = store_get_perm(big_buffer_size *= 2);
459 memcpy(buf, big_buffer, --len);
460 big_buffer = buf;
461 if (Ufgets(big_buffer+len, big_buffer_size-len, f) == NULL)
462 goto SPOOL_READ_ERROR;
463 }
464 big_buffer[len-1] = 0;
47ca6d6c 465
08955dd3 466 switch(big_buffer[1])
059ec3d9 467 {
08955dd3
PH
468 case 'a':
469
470 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
471 variable, because Exim allows any number of them, with arbitrary names.
472 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
473 the c or m. */
474
475 if (Ustrncmp(p, "clc ", 4) == 0 ||
476 Ustrncmp(p, "clm ", 4) == 0)
477 {
478 uschar *name, *endptr;
479 int count;
480 tree_node *node;
481 endptr = Ustrchr(big_buffer + 6, ' ');
482 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
bb07bcd3
JH
483 name = string_sprintf("%c%.*s", big_buffer[4],
484 (int)(endptr - big_buffer - 6), big_buffer + 6);
08955dd3
PH
485 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
486 node = acl_var_create(name);
487 node->data.ptr = store_get(count + 1);
488 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
489 ((uschar*)node->data.ptr)[count] = 0;
490 }
491
492 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
493 allow_unqualified_recipient = TRUE;
494 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
495 allow_unqualified_sender = TRUE;
496
497 else if (Ustrncmp(p, "uth_id", 6) == 0)
498 authenticated_id = string_copy(big_buffer + 9);
499 else if (Ustrncmp(p, "uth_sender", 10) == 0)
500 authenticated_sender = string_copy(big_buffer + 13);
501 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
502 smtp_active_hostname = string_copy(big_buffer + 17);
503
504 /* For long-term backward compatibility, we recognize "-acl", which was
505 used before the number of ACL variables changed from 10 to 20. This was
506 before the subsequent change to an arbitrary number of named variables.
507 This code is retained so that upgrades from very old versions can still
508 handle old-format spool files. The value given after "-acl" is a number
509 that is 0-9 for connection variables, and 10-19 for message variables. */
510
511 else if (Ustrncmp(p, "cl ", 3) == 0)
512 {
4dc2379a
JH
513 unsigned index, count;
514 uschar name[20]; /* Need plenty of space for %u format */
515 tree_node * node;
516 if ( sscanf(CS big_buffer + 5, "%u %u", &index, &count) != 2
806c3df9 517 || index >= 20
f267271d 518 || count > 16384 /* arbitrary limit on variable size */
806c3df9 519 )
08955dd3 520 goto SPOOL_FORMAT_ERROR;
8dce1a6f 521 if (index < 10)
4dc2379a 522 (void) string_format(name, sizeof(name), "%c%u", 'c', index);
806c3df9 523 else
4dc2379a 524 (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
08955dd3
PH
525 node = acl_var_create(name);
526 node->data.ptr = store_get(count + 1);
f267271d
JH
527 /* We sanity-checked the count, so disable the Coverity error */
528 /* coverity[tainted_data] */
08955dd3 529 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
4dc2379a 530 (US node->data.ptr)[count] = '\0';
08955dd3
PH
531 }
532 break;
533
534 case 'b':
535 if (Ustrncmp(p, "ody_linecount", 13) == 0)
536 body_linecount = Uatoi(big_buffer + 15);
537 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
538 body_zerocount = Uatoi(big_buffer + 15);
e91ad4a7 539#ifdef EXPERIMENTAL_BRIGHTMAIL
08955dd3
PH
540 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
541 bmi_verdicts = string_copy(big_buffer + 14);
e91ad4a7 542#endif
08955dd3
PH
543 break;
544
545 case 'd':
546 if (Ustrcmp(p, "eliver_firsttime") == 0)
547 deliver_firsttime = TRUE;
6c1c3d1d
WB
548 /* Check if the dsn flags have been set in the header file */
549 else if (Ustrncmp(p, "sn_ret", 6) == 0)
45500060 550 dsn_ret= atoi(CS big_buffer + 8);
6c1c3d1d 551 else if (Ustrncmp(p, "sn_envid", 8) == 0)
6c1c3d1d 552 dsn_envid = string_copy(big_buffer + 11);
08955dd3
PH
553 break;
554
555 case 'f':
556 if (Ustrncmp(p, "rozen", 5) == 0)
557 {
558 deliver_freeze = TRUE;
dc8091e7
JH
559 if (sscanf(CS big_buffer+7, TIME_T_FMT, &deliver_frozen_at) != 1)
560 goto SPOOL_READ_ERROR;
08955dd3
PH
561 }
562 break;
563
564 case 'h':
565 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
566 host_lookup_deferred = TRUE;
567 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
568 host_lookup_failed = TRUE;
569 else if (Ustrncmp(p, "ost_auth", 8) == 0)
570 sender_host_authenticated = string_copy(big_buffer + 11);
571 else if (Ustrncmp(p, "ost_name", 8) == 0)
572 sender_host_name = string_copy(big_buffer + 11);
573 else if (Ustrncmp(p, "elo_name", 8) == 0)
574 sender_helo_name = string_copy(big_buffer + 11);
575
576 /* We now record the port number after the address, separated by a
577 dot. For compatibility during upgrading, do nothing if there
578 isn't a value (it gets left at zero). */
579
580 else if (Ustrncmp(p, "ost_address", 11) == 0)
581 {
582 sender_host_port = host_address_extract_port(big_buffer + 14);
583 sender_host_address = string_copy(big_buffer + 14);
584 }
585 break;
586
587 case 'i':
588 if (Ustrncmp(p, "nterface_address", 16) == 0)
589 {
590 interface_port = host_address_extract_port(big_buffer + 19);
591 interface_address = string_copy(big_buffer + 19);
592 }
593 else if (Ustrncmp(p, "dent", 4) == 0)
594 sender_ident = string_copy(big_buffer + 7);
595 break;
596
597 case 'l':
32dfdf8b
JH
598 if (Ustrcmp(p, "ocal") == 0)
599 sender_local = TRUE;
08955dd3
PH
600 else if (Ustrcmp(big_buffer, "-localerror") == 0)
601 local_error_message = TRUE;
9723f966 602#ifdef HAVE_LOCAL_SCAN
08955dd3
PH
603 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
604 local_scan_data = string_copy(big_buffer + 12);
9723f966 605#endif
08955dd3
PH
606 break;
607
608 case 'm':
609 if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
d677b2f2
PH
610 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
611 max_received_linelength = Uatoi(big_buffer + 24);
08955dd3
PH
612 break;
613
614 case 'N':
615 if (*p == 0) dont_deliver = TRUE; /* -N */
616 break;
617
618 case 'r':
619 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
620 received_protocol = string_copy(big_buffer + 19);
32dfdf8b
JH
621 else if (Ustrncmp(p, "eceived_time_usec", 17) == 0)
622 {
623 unsigned usec;
624 if (sscanf(CS big_buffer + 21, "%u", &usec) == 1)
625 received_time.tv_usec = usec;
626 }
08955dd3
PH
627 break;
628
629 case 's':
630 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
631 sender_set_untrusted = TRUE;
e91ad4a7 632#ifdef WITH_CONTENT_SCAN
3481c572
JH
633 else if (Ustrncmp(p, "pam_bar ", 8) == 0)
634 spam_bar = string_copy(big_buffer + 10);
635 else if (Ustrncmp(p, "pam_score ", 10) == 0)
636 spam_score = string_copy(big_buffer + 12);
08955dd3
PH
637 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
638 spam_score_int = string_copy(big_buffer + 16);
e91ad4a7 639#endif
328c5688
JH
640#ifndef COMPILE_UTILITY
641 else if (Ustrncmp(p, "pool_file_wireformat", 20) == 0)
642 spool_file_wireformat = TRUE;
643#endif
8c5d388a 644#if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
7ade712c
JH
645 else if (Ustrncmp(p, "mtputf8", 7) == 0)
646 message_smtputf8 = TRUE;
647#endif
08955dd3
PH
648 break;
649
e91ad4a7 650#ifdef SUPPORT_TLS
08955dd3
PH
651 case 't':
652 if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
817d9f57 653 tls_in.certificate_verified = TRUE;
08955dd3 654 else if (Ustrncmp(p, "ls_cipher", 9) == 0)
817d9f57 655 tls_in.cipher = string_copy(big_buffer + 12);
e91ad4a7 656# ifndef COMPILE_UTILITY /* tls support fns not built in */
9d1c15ef
JH
657 else if (Ustrncmp(p, "ls_ourcert", 10) == 0)
658 (void) tls_import_cert(big_buffer + 13, &tls_in.ourcert);
659 else if (Ustrncmp(p, "ls_peercert", 11) == 0)
660 (void) tls_import_cert(big_buffer + 14, &tls_in.peercert);
e91ad4a7 661# endif
08955dd3 662 else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
817d9f57 663 tls_in.peerdn = string_unprinting(string_copy(big_buffer + 12));
7be682ca 664 else if (Ustrncmp(p, "ls_sni", 6) == 0)
817d9f57 665 tls_in.sni = string_unprinting(string_copy(big_buffer + 9));
44662487
JH
666 else if (Ustrncmp(p, "ls_ocsp", 7) == 0)
667 tls_in.ocsp = big_buffer[10] - '0';
08955dd3 668 break;
e91ad4a7 669#endif
08955dd3 670
8c5d388a 671#if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
3c8b3577
JH
672 case 'u':
673 if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
674 message_utf8_downconvert = 1;
0ec7e948 675 else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
3c8b3577
JH
676 message_utf8_downconvert = -1;
677 break;
678#endif
679
08955dd3
PH
680 default: /* Present because some compilers complain if all */
681 break; /* possibilities are not covered. */
059ec3d9 682 }
059ec3d9
PH
683 }
684
685/* Build sender_fullhost if required */
686
687#ifndef COMPILE_UTILITY
688host_build_sender_fullhost();
689#endif /* COMPILE_UTILITY */
690
691#ifndef COMPILE_UTILITY
692DEBUG(D_deliver)
693 debug_printf("sender_local=%d ident=%s\n", sender_local,
694 (sender_ident == NULL)? US"unset" : sender_ident);
695#endif /* COMPILE_UTILITY */
696
697/* We now have the tree of addresses NOT to deliver to, or a line
698containing "XX", indicating no tree. */
699
700if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
701 !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
702 goto SPOOL_FORMAT_ERROR;
703
704#ifndef COMPILE_UTILITY
705DEBUG(D_deliver)
706 {
707 debug_printf("Non-recipients:\n");
708 debug_print_tree(tree_nonrecipients);
709 }
710#endif /* COMPILE_UTILITY */
711
712/* After reading the tree, the next line has not yet been read into the
d88f0784
JH
713buffer. It contains the count of recipients which follow on separate lines.
714Apply an arbitrary sanity check.*/
059ec3d9
PH
715
716if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
d88f0784
JH
717if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
718 goto SPOOL_FORMAT_ERROR;
059ec3d9
PH
719
720#ifndef COMPILE_UTILITY
721DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
722#endif /* COMPILE_UTILITY */
723
724recipients_list_max = rcount;
725recipients_list = store_get(rcount * sizeof(recipient_item));
726
d88f0784
JH
727/* We sanitised the count and know we have enough memory, so disable
728the Coverity error on recipients_count */
729/* coverity[tainted_data] */
730
059ec3d9
PH
731for (recipients_count = 0; recipients_count < rcount; recipients_count++)
732 {
733 int nn;
734 int pno = -1;
6c1c3d1d
WB
735 int dsn_flags = 0;
736 uschar *orcpt = NULL;
059ec3d9
PH
737 uschar *errors_to = NULL;
738 uschar *p;
739
740 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
741 nn = Ustrlen(big_buffer);
742 if (nn < 2) goto SPOOL_FORMAT_ERROR;
743
744 /* Remove the newline; this terminates the address if there is no additional
745 data on the line. */
746
747 p = big_buffer + nn - 1;
748 *p-- = 0;
749
750 /* Look back from the end of the line for digits and special terminators.
751 Since an address must end with a domain, we can tell that extra data is
752 present by the presence of the terminator, which is always some character
753 that cannot exist in a domain. (If I'd thought of the need for additional
754 data early on, I'd have put it at the start, with the address at the end. As
755 it is, we have to operate backwards. Addresses are permitted to contain
756 spaces, you see.)
757
758 This code has to cope with various versions of this data that have evolved
759 over time. In all cases, the line might just contain an address, with no
760 additional data. Otherwise, the possibilities are as follows:
761
762 Exim 3 type: <address><space><digits>,<digits>,<digits>
763
764 The second set of digits is the parent number for one_time addresses. The
765 other values were remnants of earlier experiments that were abandoned.
766
767 Exim 4 first type: <address><space><digits>
768
769 The digits are the parent number for one_time addresses.
770
771 Exim 4 new type: <address><space><data>#<type bits>
772
773 The type bits indicate what the contents of the data are.
774
775 Bit 01 indicates that, reading from right to left, the data
776 ends with <errors_to address><space><len>,<pno> where pno is
777 the parent number for one_time addresses, and len is the length
778 of the errors_to address (zero meaning none).
6c1c3d1d
WB
779
780 Bit 02 indicates that, again reading from right to left, the data continues
781 with orcpt len(orcpt),dsn_flags
059ec3d9
PH
782 */
783
784 while (isdigit(*p)) p--;
785
786 /* Handle Exim 3 spool files */
787
788 if (*p == ',')
789 {
790 int dummy;
791 while (isdigit(*(--p)) || *p == ',');
792 if (*p == ' ')
793 {
794 *p++ = 0;
ff790e47 795 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
059ec3d9
PH
796 }
797 }
798
799 /* Handle early Exim 4 spool files */
800
801 else if (*p == ' ')
802 {
803 *p++ = 0;
ff790e47 804 (void)sscanf(CS p, "%d", &pno);
059ec3d9
PH
805 }
806
807 /* Handle current format Exim 4 spool files */
808
809 else if (*p == '#')
810 {
811 int flags;
6c1c3d1d 812
50dc7409 813#if !defined (COMPILE_UTILITY)
e91ad4a7
JH
814 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 4 standard format spoolfile\n");
815#endif
6c1c3d1d 816
ff790e47 817 (void)sscanf(CS p+1, "%d", &flags);
059ec3d9
PH
818
819 if ((flags & 0x01) != 0) /* one_time data exists */
820 {
821 int len;
822 while (isdigit(*(--p)) || *p == ',' || *p == '-');
ff790e47 823 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
059ec3d9
PH
824 *p = 0;
825 if (len > 0)
826 {
827 p -= len;
828 errors_to = string_copy(p);
94431adb 829 }
6c1c3d1d
WB
830 }
831
832 *(--p) = 0; /* Terminate address */
6c1c3d1d
WB
833 if ((flags & 0x02) != 0) /* one_time data exists */
834 {
835 int len;
836 while (isdigit(*(--p)) || *p == ',' || *p == '-');
837 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
838 *p = 0;
839 if (len > 0)
840 {
841 p -= len;
842 orcpt = string_copy(p);
94431adb 843 }
059ec3d9
PH
844 }
845
846 *(--p) = 0; /* Terminate address */
6c1c3d1d 847 }
50dc7409 848#if !defined(COMPILE_UTILITY)
6c1c3d1d 849 else
e91ad4a7 850 { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
6c1c3d1d
WB
851
852 if ((orcpt != NULL) || (dsn_flags != 0))
853 {
854 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| orcpt: |%s| dsn_flags: %d\n",
855 big_buffer, orcpt, dsn_flags);
856 }
857 if (errors_to != NULL)
858 {
859 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| errorsto: |%s|\n",
860 big_buffer, errors_to);
059ec3d9 861 }
50dc7409 862#endif
059ec3d9
PH
863
864 recipients_list[recipients_count].address = string_copy(big_buffer);
865 recipients_list[recipients_count].pno = pno;
866 recipients_list[recipients_count].errors_to = errors_to;
6c1c3d1d
WB
867 recipients_list[recipients_count].orcpt = orcpt;
868 recipients_list[recipients_count].dsn_flags = dsn_flags;
059ec3d9
PH
869 }
870
871/* The remainder of the spool header file contains the headers for the message,
872separated off from the previous data by a blank line. Each header is preceded
873by a count of its length and either a certain letter (for various identified
874headers), space (for a miscellaneous live header) or an asterisk (for a header
875that has been rewritten). Count the Received: headers. We read the headers
876always, in order to check on the format of the file, but only create a header
877list if requested to do so. */
878
879inheader = TRUE;
880if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
881if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
882
883while ((n = fgetc(f)) != EOF)
884 {
885 header_line *h;
886 uschar flag[4];
887 int i;
888
889 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
1ac6b2e7
JH
890 if(ungetc(n, f) == EOF || fscanf(f, "%d%c ", &n, flag) == EOF)
891 goto SPOOL_READ_ERROR;
059ec3d9
PH
892 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
893
894 if (read_headers)
895 {
896 h = store_get(sizeof(header_line));
897 h->next = NULL;
898 h->type = flag[0];
899 h->slen = n;
900 h->text = store_get(n+1);
901
902 if (h->type == htype_received) received_count++;
903
904 if (header_list == NULL) header_list = h;
905 else header_last->next = h;
906 header_last = h;
907
908 for (i = 0; i < n; i++)
909 {
910 int c = fgetc(f);
911 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
912 if (c == '\n' && h->type != htype_old) message_linecount++;
913 h->text[i] = c;
914 }
915 h->text[i] = 0;
916 }
917
918 /* Not requiring header data, just skip through the bytes */
919
920 else for (i = 0; i < n; i++)
921 {
922 int c = fgetc(f);
923 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
924 }
925 }
926
927/* We have successfully read the data in the header file. Update the message
928line count by adding the body linecount to the header linecount. Close the file
929and give a positive response. */
930
931#ifndef COMPILE_UTILITY
932DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
933 body_linecount, message_linecount);
934#endif /* COMPILE_UTILITY */
935
936message_linecount += body_linecount;
937
938fclose(f);
939return spool_read_OK;
940
941
942/* There was an error reading the spool or there was missing data,
943or there was a format error. A "read error" with no errno means an
944unexpected EOF, which we treat as a format error. */
945
946SPOOL_READ_ERROR:
947if (errno != 0)
948 {
949 n = errno;
950
e91ad4a7 951#ifndef COMPILE_UTILITY
059ec3d9 952 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
e91ad4a7 953#endif /* COMPILE_UTILITY */
059ec3d9
PH
954
955 fclose(f);
956 errno = n;
957 return inheader? spool_read_hdrerror : spool_read_enverror;
958 }
959
960SPOOL_FORMAT_ERROR:
961
962#ifndef COMPILE_UTILITY
963DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
964#endif /* COMPILE_UTILITY */
965
966fclose(f);
967errno = ERRNO_SPOOLFORMAT;
968return inheader? spool_read_hdrerror : spool_read_enverror;
969}
970
9d1c15ef
JH
971/* vi: aw ai sw=2
972*/
059ec3d9 973/* End of spool_in.c */