src/src/spool_in.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2016 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8 /* Functions for reading spool files. When compiling for a utility (eximon),
   9 not 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
  22 can get replaced during delivery because of header rewriting. The file has
  23 to opened with write access so that we can get an exclusive lock, but in
  24 fact it won't be written to. Just in case there's a major disaster (e.g.
  25 overwriting some other file descriptor with the value of this one), open it
  26 with append.
  27
  28 As called by deliver_message() (at least) we are operating as root.
  29
  30 Argument: the id of the message
  31 Returns:  fd if file successfully opened and locked, else -1
  32
  33 Side effect: message_subdir is set for the (possibly split) spool directory
  34 */
  35
  36 int
  37 spool_open_datafile(uschar *id)
  38 {
  39 int i;
  40 struct stat statbuf;
  41 flock_t lock_data;
  42 int fd;
  43
  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
  49 splitting state. */
  50
  51 for (i = 0; i < 2; i++)
  52   {
  53   uschar * fname;
  54   int save_errno;
  55
  56   message_subdir[0] = split_spool_directory == i ? '\0' : id[5];
  57   fname = spool_fname(US"input", message_subdir, id, US"-D");
  58   DEBUG(D_deliver) debug_printf("Trying spool file %s\n", fname);
  59
  60   if ((fd = Uopen(fname,
  61 #ifdef O_CLOEXEC
  62                       O_CLOEXEC |
  63 #endif
  64                       O_RDWR | O_APPEND, 0)) >= 0)
  65     break;
  66   save_errno = errno;
  67   if (errno == ENOENT)
  68     {
  69     if (i == 0) continue;
  70     if (!queue_running)
  71       log_write(0, LOG_MAIN, "Spool%s%s file %s-D not found",
  72         *queue_name ? US" Q=" : US"",
  73         *queue_name ? queue_name : US"",
  74         id);
  75     }
  76   else
  77     log_write(0, LOG_MAIN, "Spool error for %s: %s", fname, strerror(errno));
  78   errno = save_errno;
  79   return -1;
  80   }
  81
  82 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
  83 the file. We lock only the first line of the file (containing the message ID)
  84 because this apparently is needed for running Exim under Cygwin. If the entire
  85 file is locked in one process, a sub-process cannot access it, even when passed
  86 an open file descriptor (at least, I think that's the Cygwin story). On real
  87 Unix systems it doesn't make any difference as long as Exim is consistent in
  88 what it locks. */
  89
  90 #ifndef O_CLOEXEC
  91 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
  92 #endif
  93
  94 lock_data.l_type = F_WRLCK;
  95 lock_data.l_whence = SEEK_SET;
  96 lock_data.l_start = 0;
  97 lock_data.l_len = SPOOL_DATA_START_OFFSET;
  98
  99 if (fcntl(fd, F_SETLK, &lock_data) < 0)
 100   {
 101   log_write(L_skip_delivery,
 102             LOG_MAIN,
 103             "Spool file is locked (another process is handling this message)");
 104   (void)close(fd);
 105   errno = 0;
 106   return -1;
 107   }
 108
 109 /* Get the size of the data; don't include the leading filename line
 110 in the count, but add one for the newline before the data. */
 111
 112 if (fstat(fd, &statbuf) == 0)
 113   {
 114   message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
 115   message_size = message_body_size + 1;
 116   }
 117
 118 return fd;
 119 }
 120 #endif  /* COMPILE_UTILITY */
 121
 122
 123
 124 /*************************************************
 125 *    Read non-recipients tree from spool file    *
 126 *************************************************/
 127
 128 /* The tree of non-recipients is written to the spool file in a form that
 129 makes it easy to read back into a tree. The format is as follows:
 130
 131    . Each node is preceded by two letter(Y/N) indicating whether it has left
 132      or right children. There's one space after the two flags, before the name.
 133
 134    . The left subtree (if any) then follows, then the right subtree (if any).
 135
 136 This function is entered with the next input line in the buffer. Note we must
 137 save the right flag before recursing with the same buffer.
 138
 139 Once the tree is read, we re-construct the balance fields by scanning the tree.
 140 I forgot to write them out originally, and the compatible fix is to do it this
 141 way. This initial local recursing function does the necessary.
 142
 143 Arguments:
 144   node      tree node
 145
 146 Returns:    maximum depth below the node, including the node itself
 147 */
 148
 149 static int
 150 count_below(tree_node *node)
 151 {
 152 int nleft, nright;
 153 if (node == NULL) return 0;
 154 nleft = count_below(node->left);
 155 nright = count_below(node->right);
 156 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
 157 return 1 + ((nleft > nright)? nleft : nright);
 158 }
 159
 160 /* This is the real function...
 161
 162 Arguments:
 163   connect      pointer to the root of the tree
 164   f            FILE to read data from
 165   buffer       contains next input line; further lines read into it
 166   buffer_size  size of the buffer
 167
 168 Returns:       FALSE on format error
 169 */
 170
 171 static BOOL
 172 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
 173   int buffer_size)
 174 {
 175 tree_node *node;
 176 int n = Ustrlen(buffer);
 177 BOOL right = buffer[1] == 'Y';
 178
 179 if (n < 5) return FALSE;    /* malformed line */
 180 buffer[n-1] = 0;            /* Remove \n */
 181 node = store_get(sizeof(tree_node) + n - 3);
 182 *connect = node;
 183 Ustrcpy(node->name, buffer + 3);
 184 node->data.ptr = NULL;
 185
 186 if (buffer[0] == 'Y')
 187   {
 188   if (Ufgets(buffer, buffer_size, f) == NULL ||
 189     !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
 190       return FALSE;
 191   }
 192 else node->left = NULL;
 193
 194 if (right)
 195   {
 196   if (Ufgets(buffer, buffer_size, f) == NULL ||
 197     !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
 198       return FALSE;
 199   }
 200 else node->right = NULL;
 201
 202 (void) count_below(*connect);
 203 return TRUE;
 204 }
 205
 206
 207
 208
 209 /*************************************************
 210 *             Read spool header file             *
 211 *************************************************/
 212
 213 /* This function reads a spool header file and places the data into the
 214 appropriate global variables. The header portion is always read, but header
 215 structures are built only if read_headers is set true. It isn't, for example,
 216 while generating -bp output.
 217
 218 It may be possible for blocks of nulls (binary zeroes) to get written on the
 219 end of a file if there is a system crash during writing. It was observed on an
 220 earlier version of Exim that omitted to fsync() the files - this is thought to
 221 have been the cause of that incident, but in any case, this code must be robust
 222 against such an event, and if such a file is encountered, it must be treated as
 223 malformed.
 224
 225 As called from deliver_message() (at least) we are running as root.
 226
 227 Arguments:
 228   name          name of the header file, including the -H
 229   read_headers  TRUE if in-store header structures are to be built
 230   subdir_set    TRUE is message_subdir is already set
 231
 232 Returns:        spool_read_OK        success
 233                 spool_read_notopen   open failed
 234                 spool_read_enverror  error in the envelope portion
 235                 spool_read_hdrerror  error in the header portion
 236 */
 237
 238 int
 239 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
 240 {
 241 FILE *f = NULL;
 242 int n;
 243 int rcount = 0;
 244 long int uid, gid;
 245 BOOL inheader = FALSE;
 246 uschar *p;
 247
 248 /* Reset all the global variables to their default values. However, there is
 249 one exception. DO NOT change the default value of dont_deliver, because it may
 250 be forced by an external setting. */
 251
 252 acl_var_c = acl_var_m = NULL;
 253 authenticated_id = NULL;
 254 authenticated_sender = NULL;
 255 allow_unqualified_recipient = FALSE;
 256 allow_unqualified_sender = FALSE;
 257 body_linecount = 0;
 258 body_zerocount = 0;
 259 deliver_firsttime = FALSE;
 260 deliver_freeze = FALSE;
 261 deliver_frozen_at = 0;
 262 deliver_manual_thaw = FALSE;
 263 /* dont_deliver must NOT be reset */
 264 header_list = header_last = NULL;
 265 host_lookup_deferred = FALSE;
 266 host_lookup_failed = FALSE;
 267 interface_address = NULL;
 268 interface_port = 0;
 269 local_error_message = FALSE;
 270 local_scan_data = NULL;
 271 max_received_linelength = 0;
 272 message_linecount = 0;
 273 received_protocol = NULL;
 274 received_count = 0;
 275 recipients_list = NULL;
 276 sender_address = NULL;
 277 sender_fullhost = NULL;
 278 sender_helo_name = NULL;
 279 sender_host_address = NULL;
 280 sender_host_name = NULL;
 281 sender_host_port = 0;
 282 sender_host_authenticated = NULL;
 283 sender_ident = NULL;
 284 sender_local = FALSE;
 285 sender_set_untrusted = FALSE;
 286 smtp_active_hostname = primary_hostname;
 287 tree_nonrecipients = NULL;
 288
 289 #ifdef EXPERIMENTAL_BRIGHTMAIL
 290 bmi_run = 0;
 291 bmi_verdicts = NULL;
 292 #endif
 293
 294 #ifndef DISABLE_DKIM
 295 dkim_signers = NULL;
 296 dkim_disable_verify = FALSE;
 297 dkim_collect_input = FALSE;
 298 #endif
 299
 300 #ifdef SUPPORT_TLS
 301 tls_in.certificate_verified = FALSE;
 302 # ifdef EXPERIMENTAL_DANE
 303 tls_in.dane_verified = FALSE;
 304 # endif
 305 tls_in.cipher = NULL;
 306 # ifndef COMPILE_UTILITY        /* tls support fns not built in */
 307 tls_free_cert(&tls_in.ourcert);
 308 tls_free_cert(&tls_in.peercert);
 309 # endif
 310 tls_in.peerdn = NULL;
 311 tls_in.sni = NULL;
 312 tls_in.ocsp = OCSP_NOT_REQ;
 313 #endif
 314
 315 #ifdef WITH_CONTENT_SCAN
 316 spam_bar = NULL;
 317 spam_score = NULL;
 318 spam_score_int = NULL;
 319 #endif
 320
 321 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
 322 message_smtputf8 = FALSE;
 323 message_utf8_downconvert = 0;
 324 #endif
 325
 326 dsn_ret = 0;
 327 dsn_envid = NULL;
 328
 329 /* Generate the full name and open the file. If message_subdir is already
 330 set, just look in the given directory. Otherwise, look in both the split
 331 and unsplit directories, as for the data file above. */
 332
 333 for (n = 0; n < 2; n++)
 334   {
 335   if (!subdir_set)
 336     message_subdir[0] = split_spool_directory == (n == 0) ? name[5] : 0;
 337
 338   if ((f = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
 339     break;
 340   if (n != 0 || subdir_set || errno != ENOENT)
 341     return spool_read_notopen;
 342   }
 343
 344 errno = 0;
 345
 346 #ifndef COMPILE_UTILITY
 347 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
 348 #endif  /* COMPILE_UTILITY */
 349
 350 /* The first line of a spool file contains the message id followed by -H (i.e.
 351 the file name), in order to make the file self-identifying. */
 352
 353 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 354 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
 355     Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
 356   goto SPOOL_FORMAT_ERROR;
 357
 358 /* The next three lines in the header file are in a fixed format. The first
 359 contains the login, uid, and gid of the user who caused the file to be written.
 360 There are known cases where a negative gid is used, so we allow for both
 361 negative uids and gids. The second contains the mail address of the message's
 362 sender, enclosed in <>. The third contains the time the message was received,
 363 and the number of warning messages for delivery delays that have been sent. */
 364
 365 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 366
 367 p = big_buffer + Ustrlen(big_buffer);
 368 while (p > big_buffer && isspace(p[-1])) p--;
 369 *p = 0;
 370 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 371 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
 372 gid = Uatoi(p);
 373 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 374 *p = 0;
 375 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 376 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
 377 uid = Uatoi(p);
 378 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 379 *p = 0;
 380
 381 originator_login = string_copy(big_buffer);
 382 originator_uid = (uid_t)uid;
 383 originator_gid = (gid_t)gid;
 384
 385 /* envelope from */
 386 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 387 n = Ustrlen(big_buffer);
 388 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
 389   goto SPOOL_FORMAT_ERROR;
 390
 391 sender_address = store_get(n-2);
 392 Ustrncpy(sender_address, big_buffer+1, n-3);
 393 sender_address[n-3] = 0;
 394
 395 /* time */
 396 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 397 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
 398   goto SPOOL_FORMAT_ERROR;
 399
 400 message_age = time(NULL) - received_time;
 401
 402 #ifndef COMPILE_UTILITY
 403 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
 404   originator_login, (long int)originator_uid, (long int)originator_gid,
 405   sender_address);
 406 #endif  /* COMPILE_UTILITY */
 407
 408 /* Now there may be a number of optional lines, each starting with "-". If you
 409 add a new setting here, make sure you set the default above.
 410
 411 Because there are now quite a number of different possibilities, we use a
 412 switch on the first character to avoid too many failing tests. Thanks to Nico
 413 Erfurth for the patch that implemented this. I have made it even more efficient
 414 by not re-scanning the first two characters.
 415
 416 To allow new versions of Exim that add additional flags to interwork with older
 417 versions that do not understand them, just ignore any lines starting with "-"
 418 that we don't recognize. Otherwise it wouldn't be possible to back off a new
 419 version that left new-style flags written on the spool. */
 420
 421 p = big_buffer + 2;
 422 for (;;)
 423   {
 424   int len;
 425   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 426   if (big_buffer[0] != '-') break;
 427   while (  (len = Ustrlen(big_buffer)) == big_buffer_size-1
 428         && big_buffer[len-1] != '\n'
 429         )
 430     {   /* buffer not big enough for line; certs make this possible */
 431     uschar * buf;
 432     if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
 433     buf = store_get_perm(big_buffer_size *= 2);
 434     memcpy(buf, big_buffer, --len);
 435     big_buffer = buf;
 436     if (Ufgets(big_buffer+len, big_buffer_size-len, f) == NULL)
 437       goto SPOOL_READ_ERROR;
 438     }
 439   big_buffer[len-1] = 0;
 440
 441   switch(big_buffer[1])
 442     {
 443     case 'a':
 444
 445     /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
 446     variable, because Exim allows any number of them, with arbitrary names.
 447     The line in the spool file is "-acl[cm] <name> <length>". The name excludes
 448     the c or m. */
 449
 450     if (Ustrncmp(p, "clc ", 4) == 0 ||
 451         Ustrncmp(p, "clm ", 4) == 0)
 452       {
 453       uschar *name, *endptr;
 454       int count;
 455       tree_node *node;
 456       endptr = Ustrchr(big_buffer + 6, ' ');
 457       if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
 458       name = string_sprintf("%c%.*s", big_buffer[4], endptr - big_buffer - 6,
 459         big_buffer + 6);
 460       if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
 461       node = acl_var_create(name);
 462       node->data.ptr = store_get(count + 1);
 463       if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 464       ((uschar*)node->data.ptr)[count] = 0;
 465       }
 466
 467     else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
 468       allow_unqualified_recipient = TRUE;
 469     else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
 470       allow_unqualified_sender = TRUE;
 471
 472     else if (Ustrncmp(p, "uth_id", 6) == 0)
 473       authenticated_id = string_copy(big_buffer + 9);
 474     else if (Ustrncmp(p, "uth_sender", 10) == 0)
 475       authenticated_sender = string_copy(big_buffer + 13);
 476     else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
 477       smtp_active_hostname = string_copy(big_buffer + 17);
 478
 479     /* For long-term backward compatibility, we recognize "-acl", which was
 480     used before the number of ACL variables changed from 10 to 20. This was
 481     before the subsequent change to an arbitrary number of named variables.
 482     This code is retained so that upgrades from very old versions can still
 483     handle old-format spool files. The value given after "-acl" is a number
 484     that is 0-9 for connection variables, and 10-19 for message variables. */
 485
 486     else if (Ustrncmp(p, "cl ", 3) == 0)
 487       {
 488       unsigned index, count;
 489       uschar name[20];   /* Need plenty of space for %u format */
 490       tree_node * node;
 491       if (  sscanf(CS big_buffer + 5, "%u %u", &index, &count) != 2
 492          || index >= 20
 493          || count > 16384       /* arbitrary limit on variable size */
 494          )
 495         goto SPOOL_FORMAT_ERROR;
 496       if (index < 10)
 497         (void) string_format(name, sizeof(name), "%c%u", 'c', index);
 498       else
 499         (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
 500       node = acl_var_create(name);
 501       node->data.ptr = store_get(count + 1);
 502       /* We sanity-checked the count, so disable the Coverity error */
 503       /* coverity[tainted_data] */
 504       if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 505       (US node->data.ptr)[count] = '\0';
 506       }
 507     break;
 508
 509     case 'b':
 510     if (Ustrncmp(p, "ody_linecount", 13) == 0)
 511       body_linecount = Uatoi(big_buffer + 15);
 512     else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
 513       body_zerocount = Uatoi(big_buffer + 15);
 514 #ifdef EXPERIMENTAL_BRIGHTMAIL
 515     else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
 516       bmi_verdicts = string_copy(big_buffer + 14);
 517 #endif
 518     break;
 519
 520     case 'd':
 521     if (Ustrcmp(p, "eliver_firsttime") == 0)
 522       deliver_firsttime = TRUE;
 523     /* Check if the dsn flags have been set in the header file */
 524     else if (Ustrncmp(p, "sn_ret", 6) == 0)
 525       dsn_ret= atoi(CS big_buffer + 8);
 526     else if (Ustrncmp(p, "sn_envid", 8) == 0)
 527       dsn_envid = string_copy(big_buffer + 11);
 528     break;
 529
 530     case 'f':
 531     if (Ustrncmp(p, "rozen", 5) == 0)
 532       {
 533       deliver_freeze = TRUE;
 534       if (sscanf(CS big_buffer+7, TIME_T_FMT, &deliver_frozen_at) != 1)
 535         goto SPOOL_READ_ERROR;
 536       }
 537     break;
 538
 539     case 'h':
 540     if (Ustrcmp(p, "ost_lookup_deferred") == 0)
 541       host_lookup_deferred = TRUE;
 542     else if (Ustrcmp(p, "ost_lookup_failed") == 0)
 543       host_lookup_failed = TRUE;
 544     else if (Ustrncmp(p, "ost_auth", 8) == 0)
 545       sender_host_authenticated = string_copy(big_buffer + 11);
 546     else if (Ustrncmp(p, "ost_name", 8) == 0)
 547       sender_host_name = string_copy(big_buffer + 11);
 548     else if (Ustrncmp(p, "elo_name", 8) == 0)
 549       sender_helo_name = string_copy(big_buffer + 11);
 550
 551     /* We now record the port number after the address, separated by a
 552     dot. For compatibility during upgrading, do nothing if there
 553     isn't a value (it gets left at zero). */
 554
 555     else if (Ustrncmp(p, "ost_address", 11) == 0)
 556       {
 557       sender_host_port = host_address_extract_port(big_buffer + 14);
 558       sender_host_address = string_copy(big_buffer + 14);
 559       }
 560     break;
 561
 562     case 'i':
 563     if (Ustrncmp(p, "nterface_address", 16) == 0)
 564       {
 565       interface_port = host_address_extract_port(big_buffer + 19);
 566       interface_address = string_copy(big_buffer + 19);
 567       }
 568     else if (Ustrncmp(p, "dent", 4) == 0)
 569       sender_ident = string_copy(big_buffer + 7);
 570     break;
 571
 572     case 'l':
 573     if (Ustrcmp(p, "ocal") == 0) sender_local = TRUE;
 574     else if (Ustrcmp(big_buffer, "-localerror") == 0)
 575       local_error_message = TRUE;
 576     else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
 577       local_scan_data = string_copy(big_buffer + 12);
 578     break;
 579
 580     case 'm':
 581     if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
 582     else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
 583       max_received_linelength = Uatoi(big_buffer + 24);
 584     break;
 585
 586     case 'N':
 587     if (*p == 0) dont_deliver = TRUE;   /* -N */
 588     break;
 589
 590     case 'r':
 591     if (Ustrncmp(p, "eceived_protocol", 16) == 0)
 592       received_protocol = string_copy(big_buffer + 19);
 593     break;
 594
 595     case 's':
 596     if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
 597       sender_set_untrusted = TRUE;
 598 #ifdef WITH_CONTENT_SCAN
 599     else if (Ustrncmp(p, "pam_bar ", 8) == 0)
 600       spam_bar = string_copy(big_buffer + 10);
 601     else if (Ustrncmp(p, "pam_score ", 10) == 0)
 602       spam_score = string_copy(big_buffer + 12);
 603     else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
 604       spam_score_int = string_copy(big_buffer + 16);
 605 #endif
 606 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
 607     else if (Ustrncmp(p, "mtputf8", 7) == 0)
 608       message_smtputf8 = TRUE;
 609 #endif
 610     break;
 611
 612 #ifdef SUPPORT_TLS
 613     case 't':
 614     if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
 615       tls_in.certificate_verified = TRUE;
 616     else if (Ustrncmp(p, "ls_cipher", 9) == 0)
 617       tls_in.cipher = string_copy(big_buffer + 12);
 618 # ifndef COMPILE_UTILITY        /* tls support fns not built in */
 619     else if (Ustrncmp(p, "ls_ourcert", 10) == 0)
 620       (void) tls_import_cert(big_buffer + 13, &tls_in.ourcert);
 621     else if (Ustrncmp(p, "ls_peercert", 11) == 0)
 622       (void) tls_import_cert(big_buffer + 14, &tls_in.peercert);
 623 # endif
 624     else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
 625       tls_in.peerdn = string_unprinting(string_copy(big_buffer + 12));
 626     else if (Ustrncmp(p, "ls_sni", 6) == 0)
 627       tls_in.sni = string_unprinting(string_copy(big_buffer + 9));
 628     else if (Ustrncmp(p, "ls_ocsp", 7) == 0)
 629       tls_in.ocsp = big_buffer[10] - '0';
 630     break;
 631 #endif
 632
 633 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
 634     case 'u':
 635     if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
 636       message_utf8_downconvert = 1;
 637     else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
 638       message_utf8_downconvert = -1;
 639     break;
 640 #endif
 641
 642     default:    /* Present because some compilers complain if all */
 643     break;      /* possibilities are not covered. */
 644     }
 645   }
 646
 647 /* Build sender_fullhost if required */
 648
 649 #ifndef COMPILE_UTILITY
 650 host_build_sender_fullhost();
 651 #endif  /* COMPILE_UTILITY */
 652
 653 #ifndef COMPILE_UTILITY
 654 DEBUG(D_deliver)
 655   debug_printf("sender_local=%d ident=%s\n", sender_local,
 656     (sender_ident == NULL)? US"unset" : sender_ident);
 657 #endif  /* COMPILE_UTILITY */
 658
 659 /* We now have the tree of addresses NOT to deliver to, or a line
 660 containing "XX", indicating no tree. */
 661
 662 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 663   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 664     goto SPOOL_FORMAT_ERROR;
 665
 666 #ifndef COMPILE_UTILITY
 667 DEBUG(D_deliver)
 668   {
 669   debug_printf("Non-recipients:\n");
 670   debug_print_tree(tree_nonrecipients);
 671   }
 672 #endif  /* COMPILE_UTILITY */
 673
 674 /* After reading the tree, the next line has not yet been read into the
 675 buffer. It contains the count of recipients which follow on separate lines.
 676 Apply an arbitrary sanity check.*/
 677
 678 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 679 if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
 680   goto SPOOL_FORMAT_ERROR;
 681
 682 #ifndef COMPILE_UTILITY
 683 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 684 #endif  /* COMPILE_UTILITY */
 685
 686 recipients_list_max = rcount;
 687 recipients_list = store_get(rcount * sizeof(recipient_item));
 688
 689 /* We sanitised the count and know we have enough memory, so disable
 690 the Coverity error on recipients_count */
 691 /* coverity[tainted_data] */
 692
 693 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 694   {
 695   int nn;
 696   int pno = -1;
 697   int dsn_flags = 0;
 698   uschar *orcpt = NULL;
 699   uschar *errors_to = NULL;
 700   uschar *p;
 701
 702   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 703   nn = Ustrlen(big_buffer);
 704   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 705
 706   /* Remove the newline; this terminates the address if there is no additional
 707   data on the line. */
 708
 709   p = big_buffer + nn - 1;
 710   *p-- = 0;
 711
 712   /* Look back from the end of the line for digits and special terminators.
 713   Since an address must end with a domain, we can tell that extra data is
 714   present by the presence of the terminator, which is always some character
 715   that cannot exist in a domain. (If I'd thought of the need for additional
 716   data early on, I'd have put it at the start, with the address at the end. As
 717   it is, we have to operate backwards. Addresses are permitted to contain
 718   spaces, you see.)
 719
 720   This code has to cope with various versions of this data that have evolved
 721   over time. In all cases, the line might just contain an address, with no
 722   additional data. Otherwise, the possibilities are as follows:
 723
 724   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 725
 726     The second set of digits is the parent number for one_time addresses. The
 727     other values were remnants of earlier experiments that were abandoned.
 728
 729   Exim 4 first type: <address><space><digits>
 730
 731     The digits are the parent number for one_time addresses.
 732
 733   Exim 4 new type:   <address><space><data>#<type bits>
 734
 735     The type bits indicate what the contents of the data are.
 736
 737     Bit 01 indicates that, reading from right to left, the data
 738       ends with <errors_to address><space><len>,<pno> where pno is
 739       the parent number for one_time addresses, and len is the length
 740       of the errors_to address (zero meaning none).
 741
 742     Bit 02 indicates that, again reading from right to left, the data continues
 743      with orcpt len(orcpt),dsn_flags
 744    */
 745
 746   while (isdigit(*p)) p--;
 747
 748   /* Handle Exim 3 spool files */
 749
 750   if (*p == ',')
 751     {
 752     int dummy;
 753     while (isdigit(*(--p)) || *p == ',');
 754     if (*p == ' ')
 755       {
 756       *p++ = 0;
 757       (void)sscanf(CS p, "%d,%d", &dummy, &pno);
 758       }
 759     }
 760
 761   /* Handle early Exim 4 spool files */
 762
 763   else if (*p == ' ')
 764     {
 765     *p++ = 0;
 766     (void)sscanf(CS p, "%d", &pno);
 767     }
 768
 769   /* Handle current format Exim 4 spool files */
 770
 771   else if (*p == '#')
 772     {
 773     int flags;
 774
 775 #if !defined (COMPILE_UTILITY)
 776     DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 4 standard format spoolfile\n");
 777 #endif
 778
 779     (void)sscanf(CS p+1, "%d", &flags);
 780
 781     if ((flags & 0x01) != 0)      /* one_time data exists */
 782       {
 783       int len;
 784       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 785       (void)sscanf(CS p+1, "%d,%d", &len, &pno);
 786       *p = 0;
 787       if (len > 0)
 788         {
 789         p -= len;
 790         errors_to = string_copy(p);
 791         }
 792       }
 793
 794     *(--p) = 0;   /* Terminate address */
 795     if ((flags & 0x02) != 0)      /* one_time data exists */
 796       {
 797       int len;
 798       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 799       (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
 800       *p = 0;
 801       if (len > 0)
 802         {
 803         p -= len;
 804         orcpt = string_copy(p);
 805         }
 806       }
 807
 808     *(--p) = 0;   /* Terminate address */
 809     }
 810 #if !defined(COMPILE_UTILITY)
 811   else
 812     { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
 813
 814   if ((orcpt != NULL) || (dsn_flags != 0))
 815     {
 816     DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| orcpt: |%s| dsn_flags: %d\n",
 817       big_buffer, orcpt, dsn_flags);
 818     }
 819   if (errors_to != NULL)
 820     {
 821     DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| errorsto: |%s|\n",
 822       big_buffer, errors_to);
 823     }
 824 #endif
 825
 826   recipients_list[recipients_count].address = string_copy(big_buffer);
 827   recipients_list[recipients_count].pno = pno;
 828   recipients_list[recipients_count].errors_to = errors_to;
 829   recipients_list[recipients_count].orcpt = orcpt;
 830   recipients_list[recipients_count].dsn_flags = dsn_flags;
 831   }
 832
 833 /* The remainder of the spool header file contains the headers for the message,
 834 separated off from the previous data by a blank line. Each header is preceded
 835 by a count of its length and either a certain letter (for various identified
 836 headers), space (for a miscellaneous live header) or an asterisk (for a header
 837 that has been rewritten). Count the Received: headers. We read the headers
 838 always, in order to check on the format of the file, but only create a header
 839 list if requested to do so. */
 840
 841 inheader = TRUE;
 842 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 843 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 844
 845 while ((n = fgetc(f)) != EOF)
 846   {
 847   header_line *h;
 848   uschar flag[4];
 849   int i;
 850
 851   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 852   if(ungetc(n, f) == EOF  ||  fscanf(f, "%d%c ", &n, flag) == EOF)
 853     goto SPOOL_READ_ERROR;
 854   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 855
 856   if (read_headers)
 857     {
 858     h = store_get(sizeof(header_line));
 859     h->next = NULL;
 860     h->type = flag[0];
 861     h->slen = n;
 862     h->text = store_get(n+1);
 863
 864     if (h->type == htype_received) received_count++;
 865
 866     if (header_list == NULL) header_list = h;
 867       else header_last->next = h;
 868     header_last = h;
 869
 870     for (i = 0; i < n; i++)
 871       {
 872       int c = fgetc(f);
 873       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 874       if (c == '\n' && h->type != htype_old) message_linecount++;
 875       h->text[i] = c;
 876       }
 877     h->text[i] = 0;
 878     }
 879
 880   /* Not requiring header data, just skip through the bytes */
 881
 882   else for (i = 0; i < n; i++)
 883     {
 884     int c = fgetc(f);
 885     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 886     }
 887   }
 888
 889 /* We have successfully read the data in the header file. Update the message
 890 line count by adding the body linecount to the header linecount. Close the file
 891 and give a positive response. */
 892
 893 #ifndef COMPILE_UTILITY
 894 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 895   body_linecount, message_linecount);
 896 #endif  /* COMPILE_UTILITY */
 897
 898 message_linecount += body_linecount;
 899
 900 fclose(f);
 901 return spool_read_OK;
 902
 903
 904 /* There was an error reading the spool or there was missing data,
 905 or there was a format error. A "read error" with no errno means an
 906 unexpected EOF, which we treat as a format error. */
 907
 908 SPOOL_READ_ERROR:
 909 if (errno != 0)
 910   {
 911   n = errno;
 912
 913 #ifndef COMPILE_UTILITY
 914   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 915 #endif  /* COMPILE_UTILITY */
 916
 917   fclose(f);
 918   errno = n;
 919   return inheader? spool_read_hdrerror : spool_read_enverror;
 920   }
 921
 922 SPOOL_FORMAT_ERROR:
 923
 924 #ifndef COMPILE_UTILITY
 925 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 926 #endif  /* COMPILE_UTILITY */
 927
 928 fclose(f);
 929 errno = ERRNO_SPOOLFORMAT;
 930 return inheader? spool_read_hdrerror : spool_read_enverror;
 931 }
 932
 933 /* vi: aw ai sw=2
 934 */
 935 /* End of spool_in.c */