1 /* $Cambridge: exim/src/src/expand.c,v 1.92 2008/01/17 13:03:35 tom Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* Functions for handling string expansion. */
16 /* Recursively called function */
18 static uschar
*expand_string_internal(uschar
*, BOOL
, uschar
**, BOOL
);
21 #ifndef SUPPORT_CRYPTEQ
22 #define SUPPORT_CRYPTEQ
27 #include "lookups/ldap.h"
30 #ifdef SUPPORT_CRYPTEQ
35 extern char* crypt16(char*, char*);
39 /* The handling of crypt16() is a mess. I will record below the analysis of the
40 mess that was sent to me. We decided, however, to make changing this very low
41 priority, because in practice people are moving away from the crypt()
42 algorithms nowadays, so it doesn't seem worth it.
45 There is an algorithm named "crypt16" in Ultrix and Tru64. It crypts
46 the first 8 characters of the password using a 20-round version of crypt
47 (standard crypt does 25 rounds). It then crypts the next 8 characters,
48 or an empty block if the password is less than 9 characters, using a
49 20-round version of crypt and the same salt as was used for the first
50 block. Charaters after the first 16 are ignored. It always generates
51 a 16-byte hash, which is expressed together with the salt as a string
52 of 24 base 64 digits. Here are some links to peruse:
54 http://cvs.pld.org.pl/pam/pamcrypt/crypt16.c?rev=1.2
55 http://seclists.org/bugtraq/1999/Mar/0076.html
57 There's a different algorithm named "bigcrypt" in HP-UX, Digital Unix,
58 and OSF/1. This is the same as the standard crypt if given a password
59 of 8 characters or less. If given more, it first does the same as crypt
60 using the first 8 characters, then crypts the next 8 (the 9th to 16th)
61 using as salt the first two base 64 digits from the first hash block.
62 If the password is more than 16 characters then it crypts the 17th to 24th
63 characters using as salt the first two base 64 digits from the second hash
64 block. And so on: I've seen references to it cutting off the password at
65 40 characters (5 blocks), 80 (10 blocks), or 128 (16 blocks). Some links:
67 http://cvs.pld.org.pl/pam/pamcrypt/bigcrypt.c?rev=1.2
68 http://seclists.org/bugtraq/1999/Mar/0109.html
69 http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/HTML/AA-Q0R2D-
70 TET1_html/sec.c222.html#no_id_208
72 Exim has something it calls "crypt16". It will either use a native
73 crypt16 or its own implementation. A native crypt16 will presumably
74 be the one that I called "crypt16" above. The internal "crypt16"
75 function, however, is a two-block-maximum implementation of what I called
76 "bigcrypt". The documentation matches the internal code.
78 I suspect that whoever did the "crypt16" stuff for Exim didn't realise
79 that crypt16 and bigcrypt were different things.
81 Exim uses the LDAP-style scheme identifier "{crypt16}" to refer
82 to whatever it is using under that name. This unfortunately sets a
83 precedent for using "{crypt16}" to identify two incompatible algorithms
84 whose output can't be distinguished. With "{crypt16}" thus rendered
85 ambiguous, I suggest you deprecate it and invent two new identifiers
86 for the two algorithms.
88 Both crypt16 and bigcrypt are very poor algorithms, btw. Hashing parts
89 of the password separately means they can be cracked separately, so
90 the double-length hash only doubles the cracking effort instead of
91 squaring it. I recommend salted SHA-1 ({SSHA}), or the Blowfish-based
99 /*************************************************
100 * Local statics and tables *
101 *************************************************/
103 /* Table of item names, and corresponding switch numbers. The names must be in
104 alphabetical order. */
106 static uschar
*item_table
[] = {
150 /* Tables of operator names, and corresponding switch numbers. The names must be
151 in alphabetical order. There are two tables, because underscore is used in some
152 cases to introduce arguments, whereas for other it is part of the name. This is
153 an historical mis-design. */
155 static uschar
*op_table_underscore
[] = {
158 US
"quote_local_part",
165 EOP_QUOTE_LOCAL_PART
,
169 static uschar
*op_table_main
[] = {
202 EOP_ADDRESS
= sizeof(op_table_underscore
)/sizeof(uschar
*),
234 /* Table of condition names, and corresponding switch numbers. The names must
235 be in alphabetical order. */
237 static uschar
*cond_table
[] = {
241 US
"==", /* Backward compatibility */
269 US
"match_local_part",
291 ECOND_FIRST_DELIVERY
,
310 ECOND_MATCH_LOCAL_PART
,
320 /* Type for main variable table */
328 /* Type for entries pointing to address/length pairs. Not currently
336 /* Types of table entry */
339 vtype_int
, /* value is address of int */
340 vtype_filter_int
, /* ditto, but recognized only when filtering */
341 vtype_ino
, /* value is address of ino_t (not always an int) */
342 vtype_uid
, /* value is address of uid_t (not always an int) */
343 vtype_gid
, /* value is address of gid_t (not always an int) */
344 vtype_stringptr
, /* value is address of pointer to string */
345 vtype_msgbody
, /* as stringptr, but read when first required */
346 vtype_msgbody_end
, /* ditto, the end of the message */
347 vtype_msgheaders
, /* the message's headers, processed */
348 vtype_msgheaders_raw
, /* the message's headers, unprocessed */
349 vtype_localpart
, /* extract local part from string */
350 vtype_domain
, /* extract domain from string */
351 vtype_recipients
, /* extract recipients from recipients list */
352 /* (available only in system filters, ACLs, and */
354 vtype_todbsdin
, /* value not used; generate BSD inbox tod */
355 vtype_tode
, /* value not used; generate tod in epoch format */
356 vtype_todf
, /* value not used; generate full tod */
357 vtype_todl
, /* value not used; generate log tod */
358 vtype_todlf
, /* value not used; generate log file datestamp tod */
359 vtype_todzone
, /* value not used; generate time zone only */
360 vtype_todzulu
, /* value not used; generate zulu tod */
361 vtype_reply
, /* value not used; get reply from headers */
362 vtype_pid
, /* value not used; result is pid */
363 vtype_host_lookup
, /* value not used; get host name */
364 vtype_load_avg
, /* value not used; result is int from os_getloadavg */
365 vtype_pspace
, /* partition space; value is T/F for spool/log */
366 vtype_pinodes
/* partition inodes; value is T/F for spool/log */
367 #ifdef EXPERIMENTAL_DOMAINKEYS
368 ,vtype_dk_verify
/* Serve request out of DomainKeys verification structure */
372 /* This table must be kept in alphabetical order. */
374 static var_entry var_table
[] = {
375 /* WARNING: Do not invent variables whose names start acl_c or acl_m because
376 they will be confused with user-creatable ACL variables. */
377 { "acl_verify_message", vtype_stringptr
, &acl_verify_message
},
378 { "address_data", vtype_stringptr
, &deliver_address_data
},
379 { "address_file", vtype_stringptr
, &address_file
},
380 { "address_pipe", vtype_stringptr
, &address_pipe
},
381 { "authenticated_id", vtype_stringptr
, &authenticated_id
},
382 { "authenticated_sender",vtype_stringptr
, &authenticated_sender
},
383 { "authentication_failed",vtype_int
, &authentication_failed
},
384 #ifdef EXPERIMENTAL_BRIGHTMAIL
385 { "bmi_alt_location", vtype_stringptr
, &bmi_alt_location
},
386 { "bmi_base64_tracker_verdict", vtype_stringptr
, &bmi_base64_tracker_verdict
},
387 { "bmi_base64_verdict", vtype_stringptr
, &bmi_base64_verdict
},
388 { "bmi_deliver", vtype_int
, &bmi_deliver
},
390 { "body_linecount", vtype_int
, &body_linecount
},
391 { "body_zerocount", vtype_int
, &body_zerocount
},
392 { "bounce_recipient", vtype_stringptr
, &bounce_recipient
},
393 { "bounce_return_size_limit", vtype_int
, &bounce_return_size_limit
},
394 { "caller_gid", vtype_gid
, &real_gid
},
395 { "caller_uid", vtype_uid
, &real_uid
},
396 { "compile_date", vtype_stringptr
, &version_date
},
397 { "compile_number", vtype_stringptr
, &version_cnumber
},
398 { "csa_status", vtype_stringptr
, &csa_status
},
399 #ifdef EXPERIMENTAL_DCC
400 { "dcc_header", vtype_stringptr
, &dcc_header
},
401 { "dcc_result", vtype_stringptr
, &dcc_result
},
403 #ifdef WITH_OLD_DEMIME
404 { "demime_errorlevel", vtype_int
, &demime_errorlevel
},
405 { "demime_reason", vtype_stringptr
, &demime_reason
},
407 #ifdef EXPERIMENTAL_DOMAINKEYS
408 { "dk_domain", vtype_stringptr
, &dk_signing_domain
},
409 { "dk_is_signed", vtype_dk_verify
, NULL
},
410 { "dk_result", vtype_dk_verify
, NULL
},
411 { "dk_selector", vtype_stringptr
, &dk_signing_selector
},
412 { "dk_sender", vtype_dk_verify
, NULL
},
413 { "dk_sender_domain", vtype_dk_verify
, NULL
},
414 { "dk_sender_local_part",vtype_dk_verify
, NULL
},
415 { "dk_sender_source", vtype_dk_verify
, NULL
},
416 { "dk_signsall", vtype_dk_verify
, NULL
},
417 { "dk_status", vtype_dk_verify
, NULL
},
418 { "dk_testing", vtype_dk_verify
, NULL
},
420 #ifdef EXPERIMENTAL_DKIM
421 { "dkim_domain", vtype_stringptr
, &dkim_signing_domain
},
422 { "dkim_selector", vtype_stringptr
, &dkim_signing_selector
},
424 { "dnslist_domain", vtype_stringptr
, &dnslist_domain
},
425 { "dnslist_matched", vtype_stringptr
, &dnslist_matched
},
426 { "dnslist_text", vtype_stringptr
, &dnslist_text
},
427 { "dnslist_value", vtype_stringptr
, &dnslist_value
},
428 { "domain", vtype_stringptr
, &deliver_domain
},
429 { "domain_data", vtype_stringptr
, &deliver_domain_data
},
430 { "exim_gid", vtype_gid
, &exim_gid
},
431 { "exim_path", vtype_stringptr
, &exim_path
},
432 { "exim_uid", vtype_uid
, &exim_uid
},
433 #ifdef WITH_OLD_DEMIME
434 { "found_extension", vtype_stringptr
, &found_extension
},
436 { "home", vtype_stringptr
, &deliver_home
},
437 { "host", vtype_stringptr
, &deliver_host
},
438 { "host_address", vtype_stringptr
, &deliver_host_address
},
439 { "host_data", vtype_stringptr
, &host_data
},
440 { "host_lookup_deferred",vtype_int
, &host_lookup_deferred
},
441 { "host_lookup_failed", vtype_int
, &host_lookup_failed
},
442 { "inode", vtype_ino
, &deliver_inode
},
443 { "interface_address", vtype_stringptr
, &interface_address
},
444 { "interface_port", vtype_int
, &interface_port
},
445 { "item", vtype_stringptr
, &iterate_item
},
447 { "ldap_dn", vtype_stringptr
, &eldap_dn
},
449 { "load_average", vtype_load_avg
, NULL
},
450 { "local_part", vtype_stringptr
, &deliver_localpart
},
451 { "local_part_data", vtype_stringptr
, &deliver_localpart_data
},
452 { "local_part_prefix", vtype_stringptr
, &deliver_localpart_prefix
},
453 { "local_part_suffix", vtype_stringptr
, &deliver_localpart_suffix
},
454 { "local_scan_data", vtype_stringptr
, &local_scan_data
},
455 { "local_user_gid", vtype_gid
, &local_user_gid
},
456 { "local_user_uid", vtype_uid
, &local_user_uid
},
457 { "localhost_number", vtype_int
, &host_number
},
458 { "log_inodes", vtype_pinodes
, (void *)FALSE
},
459 { "log_space", vtype_pspace
, (void *)FALSE
},
460 { "mailstore_basename", vtype_stringptr
, &mailstore_basename
},
461 #ifdef WITH_CONTENT_SCAN
462 { "malware_name", vtype_stringptr
, &malware_name
},
464 { "max_received_linelength", vtype_int
, &max_received_linelength
},
465 { "message_age", vtype_int
, &message_age
},
466 { "message_body", vtype_msgbody
, &message_body
},
467 { "message_body_end", vtype_msgbody_end
, &message_body_end
},
468 { "message_body_size", vtype_int
, &message_body_size
},
469 { "message_exim_id", vtype_stringptr
, &message_id
},
470 { "message_headers", vtype_msgheaders
, NULL
},
471 { "message_headers_raw", vtype_msgheaders_raw
, NULL
},
472 { "message_id", vtype_stringptr
, &message_id
},
473 { "message_linecount", vtype_int
, &message_linecount
},
474 { "message_size", vtype_int
, &message_size
},
475 #ifdef WITH_CONTENT_SCAN
476 { "mime_anomaly_level", vtype_int
, &mime_anomaly_level
},
477 { "mime_anomaly_text", vtype_stringptr
, &mime_anomaly_text
},
478 { "mime_boundary", vtype_stringptr
, &mime_boundary
},
479 { "mime_charset", vtype_stringptr
, &mime_charset
},
480 { "mime_content_description", vtype_stringptr
, &mime_content_description
},
481 { "mime_content_disposition", vtype_stringptr
, &mime_content_disposition
},
482 { "mime_content_id", vtype_stringptr
, &mime_content_id
},
483 { "mime_content_size", vtype_int
, &mime_content_size
},
484 { "mime_content_transfer_encoding",vtype_stringptr
, &mime_content_transfer_encoding
},
485 { "mime_content_type", vtype_stringptr
, &mime_content_type
},
486 { "mime_decoded_filename", vtype_stringptr
, &mime_decoded_filename
},
487 { "mime_filename", vtype_stringptr
, &mime_filename
},
488 { "mime_is_coverletter", vtype_int
, &mime_is_coverletter
},
489 { "mime_is_multipart", vtype_int
, &mime_is_multipart
},
490 { "mime_is_rfc822", vtype_int
, &mime_is_rfc822
},
491 { "mime_part_count", vtype_int
, &mime_part_count
},
493 { "n0", vtype_filter_int
, &filter_n
[0] },
494 { "n1", vtype_filter_int
, &filter_n
[1] },
495 { "n2", vtype_filter_int
, &filter_n
[2] },
496 { "n3", vtype_filter_int
, &filter_n
[3] },
497 { "n4", vtype_filter_int
, &filter_n
[4] },
498 { "n5", vtype_filter_int
, &filter_n
[5] },
499 { "n6", vtype_filter_int
, &filter_n
[6] },
500 { "n7", vtype_filter_int
, &filter_n
[7] },
501 { "n8", vtype_filter_int
, &filter_n
[8] },
502 { "n9", vtype_filter_int
, &filter_n
[9] },
503 { "original_domain", vtype_stringptr
, &deliver_domain_orig
},
504 { "original_local_part", vtype_stringptr
, &deliver_localpart_orig
},
505 { "originator_gid", vtype_gid
, &originator_gid
},
506 { "originator_uid", vtype_uid
, &originator_uid
},
507 { "parent_domain", vtype_stringptr
, &deliver_domain_parent
},
508 { "parent_local_part", vtype_stringptr
, &deliver_localpart_parent
},
509 { "pid", vtype_pid
, NULL
},
510 { "primary_hostname", vtype_stringptr
, &primary_hostname
},
511 { "prvscheck_address", vtype_stringptr
, &prvscheck_address
},
512 { "prvscheck_keynum", vtype_stringptr
, &prvscheck_keynum
},
513 { "prvscheck_result", vtype_stringptr
, &prvscheck_result
},
514 { "qualify_domain", vtype_stringptr
, &qualify_domain_sender
},
515 { "qualify_recipient", vtype_stringptr
, &qualify_domain_recipient
},
516 { "rcpt_count", vtype_int
, &rcpt_count
},
517 { "rcpt_defer_count", vtype_int
, &rcpt_defer_count
},
518 { "rcpt_fail_count", vtype_int
, &rcpt_fail_count
},
519 { "received_count", vtype_int
, &received_count
},
520 { "received_for", vtype_stringptr
, &received_for
},
521 { "received_ip_address", vtype_stringptr
, &interface_address
},
522 { "received_port", vtype_int
, &interface_port
},
523 { "received_protocol", vtype_stringptr
, &received_protocol
},
524 { "received_time", vtype_int
, &received_time
},
525 { "recipient_data", vtype_stringptr
, &recipient_data
},
526 { "recipient_verify_failure",vtype_stringptr
,&recipient_verify_failure
},
527 { "recipients", vtype_recipients
, NULL
},
528 { "recipients_count", vtype_int
, &recipients_count
},
529 #ifdef WITH_CONTENT_SCAN
530 { "regex_match_string", vtype_stringptr
, ®ex_match_string
},
532 { "reply_address", vtype_reply
, NULL
},
533 { "return_path", vtype_stringptr
, &return_path
},
534 { "return_size_limit", vtype_int
, &bounce_return_size_limit
},
535 { "runrc", vtype_int
, &runrc
},
536 { "self_hostname", vtype_stringptr
, &self_hostname
},
537 { "sender_address", vtype_stringptr
, &sender_address
},
538 { "sender_address_data", vtype_stringptr
, &sender_address_data
},
539 { "sender_address_domain", vtype_domain
, &sender_address
},
540 { "sender_address_local_part", vtype_localpart
, &sender_address
},
541 { "sender_data", vtype_stringptr
, &sender_data
},
542 { "sender_fullhost", vtype_stringptr
, &sender_fullhost
},
543 { "sender_helo_name", vtype_stringptr
, &sender_helo_name
},
544 { "sender_host_address", vtype_stringptr
, &sender_host_address
},
545 { "sender_host_authenticated",vtype_stringptr
, &sender_host_authenticated
},
546 { "sender_host_name", vtype_host_lookup
, NULL
},
547 { "sender_host_port", vtype_int
, &sender_host_port
},
548 { "sender_ident", vtype_stringptr
, &sender_ident
},
549 { "sender_rate", vtype_stringptr
, &sender_rate
},
550 { "sender_rate_limit", vtype_stringptr
, &sender_rate_limit
},
551 { "sender_rate_period", vtype_stringptr
, &sender_rate_period
},
552 { "sender_rcvhost", vtype_stringptr
, &sender_rcvhost
},
553 { "sender_verify_failure",vtype_stringptr
, &sender_verify_failure
},
554 { "sending_ip_address", vtype_stringptr
, &sending_ip_address
},
555 { "sending_port", vtype_int
, &sending_port
},
556 { "smtp_active_hostname", vtype_stringptr
, &smtp_active_hostname
},
557 { "smtp_command", vtype_stringptr
, &smtp_cmd_buffer
},
558 { "smtp_command_argument", vtype_stringptr
, &smtp_cmd_argument
},
559 { "smtp_count_at_connection_start", vtype_int
, &smtp_accept_count
},
560 { "smtp_notquit_reason", vtype_stringptr
, &smtp_notquit_reason
},
561 { "sn0", vtype_filter_int
, &filter_sn
[0] },
562 { "sn1", vtype_filter_int
, &filter_sn
[1] },
563 { "sn2", vtype_filter_int
, &filter_sn
[2] },
564 { "sn3", vtype_filter_int
, &filter_sn
[3] },
565 { "sn4", vtype_filter_int
, &filter_sn
[4] },
566 { "sn5", vtype_filter_int
, &filter_sn
[5] },
567 { "sn6", vtype_filter_int
, &filter_sn
[6] },
568 { "sn7", vtype_filter_int
, &filter_sn
[7] },
569 { "sn8", vtype_filter_int
, &filter_sn
[8] },
570 { "sn9", vtype_filter_int
, &filter_sn
[9] },
571 #ifdef WITH_CONTENT_SCAN
572 { "spam_bar", vtype_stringptr
, &spam_bar
},
573 { "spam_report", vtype_stringptr
, &spam_report
},
574 { "spam_score", vtype_stringptr
, &spam_score
},
575 { "spam_score_int", vtype_stringptr
, &spam_score_int
},
577 #ifdef EXPERIMENTAL_SPF
578 { "spf_header_comment", vtype_stringptr
, &spf_header_comment
},
579 { "spf_received", vtype_stringptr
, &spf_received
},
580 { "spf_result", vtype_stringptr
, &spf_result
},
581 { "spf_smtp_comment", vtype_stringptr
, &spf_smtp_comment
},
583 { "spool_directory", vtype_stringptr
, &spool_directory
},
584 { "spool_inodes", vtype_pinodes
, (void *)TRUE
},
585 { "spool_space", vtype_pspace
, (void *)TRUE
},
586 #ifdef EXPERIMENTAL_SRS
587 { "srs_db_address", vtype_stringptr
, &srs_db_address
},
588 { "srs_db_key", vtype_stringptr
, &srs_db_key
},
589 { "srs_orig_recipient", vtype_stringptr
, &srs_orig_recipient
},
590 { "srs_orig_sender", vtype_stringptr
, &srs_orig_sender
},
591 { "srs_recipient", vtype_stringptr
, &srs_recipient
},
592 { "srs_status", vtype_stringptr
, &srs_status
},
594 { "thisaddress", vtype_stringptr
, &filter_thisaddress
},
595 { "tls_certificate_verified", vtype_int
, &tls_certificate_verified
},
596 { "tls_cipher", vtype_stringptr
, &tls_cipher
},
597 { "tls_peerdn", vtype_stringptr
, &tls_peerdn
},
598 { "tod_bsdinbox", vtype_todbsdin
, NULL
},
599 { "tod_epoch", vtype_tode
, NULL
},
600 { "tod_full", vtype_todf
, NULL
},
601 { "tod_log", vtype_todl
, NULL
},
602 { "tod_logfile", vtype_todlf
, NULL
},
603 { "tod_zone", vtype_todzone
, NULL
},
604 { "tod_zulu", vtype_todzulu
, NULL
},
605 { "value", vtype_stringptr
, &lookup_value
},
606 { "version_number", vtype_stringptr
, &version_string
},
607 { "warn_message_delay", vtype_stringptr
, &warnmsg_delay
},
608 { "warn_message_recipient",vtype_stringptr
, &warnmsg_recipients
},
609 { "warn_message_recipients",vtype_stringptr
,&warnmsg_recipients
},
610 { "warnmsg_delay", vtype_stringptr
, &warnmsg_delay
},
611 { "warnmsg_recipient", vtype_stringptr
, &warnmsg_recipients
},
612 { "warnmsg_recipients", vtype_stringptr
, &warnmsg_recipients
}
615 static int var_table_size
= sizeof(var_table
)/sizeof(var_entry
);
616 static uschar var_buffer
[256];
617 static BOOL malformed_header
;
619 /* For textual hashes */
621 static char *hashcodes
= "abcdefghijklmnopqrtsuvwxyz"
622 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
625 enum { HMAC_MD5
, HMAC_SHA1
};
627 /* For numeric hashes */
629 static unsigned int prime
[] = {
630 2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
631 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
632 73, 79, 83, 89, 97, 101, 103, 107, 109, 113};
634 /* For printing modes in symbolic form */
636 static uschar
*mtable_normal
[] =
637 { US
"---", US
"--x", US
"-w-", US
"-wx", US
"r--", US
"r-x", US
"rw-", US
"rwx" };
639 static uschar
*mtable_setid
[] =
640 { US
"--S", US
"--s", US
"-wS", US
"-ws", US
"r-S", US
"r-s", US
"rwS", US
"rws" };
642 static uschar
*mtable_sticky
[] =
643 { US
"--T", US
"--t", US
"-wT", US
"-wt", US
"r-T", US
"r-t", US
"rwT", US
"rwt" };
647 /*************************************************
648 * Tables for UTF-8 support *
649 *************************************************/
651 /* Table of the number of extra characters, indexed by the first character
652 masked with 0x3f. The highest number for a valid UTF-8 character is in fact
655 static uschar utf8_table1
[] = {
656 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
657 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
658 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
659 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 };
661 /* These are the masks for the data bits in the first byte of a character,
662 indexed by the number of additional bytes. */
664 static int utf8_table2
[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};
666 /* Get the next UTF-8 character, advancing the pointer. */
668 #define GETUTF8INC(c, ptr) \
670 if ((c & 0xc0) == 0xc0) \
672 int a = utf8_table1[c & 0x3f]; /* Number of additional bytes */ \
674 c = (c & utf8_table2[a]) << s; \
678 c |= (*ptr++ & 0x3f) << s; \
683 /*************************************************
684 * Binary chop search on a table *
685 *************************************************/
687 /* This is used for matching expansion items and operators.
690 name the name that is being sought
691 table the table to search
692 table_size the number of items in the table
694 Returns: the offset in the table, or -1
698 chop_match(uschar
*name
, uschar
**table
, int table_size
)
700 uschar
**bot
= table
;
701 uschar
**top
= table
+ table_size
;
705 uschar
**mid
= bot
+ (top
- bot
)/2;
706 int c
= Ustrcmp(name
, *mid
);
707 if (c
== 0) return mid
- table
;
708 if (c
> 0) bot
= mid
+ 1; else top
= mid
;
716 /*************************************************
717 * Check a condition string *
718 *************************************************/
720 /* This function is called to expand a string, and test the result for a "true"
721 or "false" value. Failure of the expansion yields FALSE; logged unless it was a
722 forced fail or lookup defer. All store used by the function can be released on
726 condition the condition string
727 m1 text to be incorporated in panic error
730 Returns: TRUE if condition is met, FALSE if not
734 expand_check_condition(uschar
*condition
, uschar
*m1
, uschar
*m2
)
737 void *reset_point
= store_get(0);
738 uschar
*ss
= expand_string(condition
);
741 if (!expand_string_forcedfail
&& !search_find_defer
)
742 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to expand condition \"%s\" "
743 "for %s %s: %s", condition
, m1
, m2
, expand_string_message
);
746 rc
= ss
[0] != 0 && Ustrcmp(ss
, "0") != 0 && strcmpic(ss
, US
"no") != 0 &&
747 strcmpic(ss
, US
"false") != 0;
748 store_reset(reset_point
);
754 /*************************************************
755 * Pick out a name from a string *
756 *************************************************/
758 /* If the name is too long, it is silently truncated.
761 name points to a buffer into which to put the name
762 max is the length of the buffer
763 s points to the first alphabetic character of the name
764 extras chars other than alphanumerics to permit
766 Returns: pointer to the first character after the name
768 Note: The test for *s != 0 in the while loop is necessary because
769 Ustrchr() yields non-NULL if the character is zero (which is not something
773 read_name(uschar
*name
, int max
, uschar
*s
, uschar
*extras
)
776 while (*s
!= 0 && (isalnum(*s
) || Ustrchr(extras
, *s
) != NULL
))
778 if (ptr
< max
-1) name
[ptr
++] = *s
;
787 /*************************************************
788 * Pick out the rest of a header name *
789 *************************************************/
791 /* A variable name starting $header_ (or just $h_ for those who like
792 abbreviations) might not be the complete header name because headers can
793 contain any printing characters in their names, except ':'. This function is
794 called to read the rest of the name, chop h[eader]_ off the front, and put ':'
795 on the end, if the name was terminated by white space.
798 name points to a buffer in which the name read so far exists
799 max is the length of the buffer
800 s points to the first character after the name so far, i.e. the
801 first non-alphameric character after $header_xxxxx
803 Returns: a pointer to the first character after the header name
807 read_header_name(uschar
*name
, int max
, uschar
*s
)
809 int prelen
= Ustrchr(name
, '_') - name
+ 1;
810 int ptr
= Ustrlen(name
) - prelen
;
811 if (ptr
> 0) memmove(name
, name
+prelen
, ptr
);
812 while (mac_isgraph(*s
) && *s
!= ':')
814 if (ptr
< max
-1) name
[ptr
++] = *s
;
825 /*************************************************
826 * Pick out a number from a string *
827 *************************************************/
830 n points to an integer into which to put the number
831 s points to the first digit of the number
833 Returns: a pointer to the character after the last digit
837 read_number(int *n
, uschar
*s
)
840 while (isdigit(*s
)) *n
= *n
* 10 + (*s
++ - '0');
846 /*************************************************
847 * Extract keyed subfield from a string *
848 *************************************************/
850 /* The yield is in dynamic store; NULL means that the key was not found.
853 key points to the name of the key
854 s points to the string from which to extract the subfield
856 Returns: NULL if the subfield was not found, or
857 a pointer to the subfield's data
861 expand_getkeyed(uschar
*key
, uschar
*s
)
863 int length
= Ustrlen(key
);
864 while (isspace(*s
)) s
++;
866 /* Loop to search for the key */
874 while (*s
!= 0 && *s
!= '=' && !isspace(*s
)) s
++;
875 dkeylength
= s
- dkey
;
876 while (isspace(*s
)) s
++;
877 if (*s
== '=') while (isspace((*(++s
))));
879 data
= string_dequote(&s
);
880 if (length
== dkeylength
&& strncmpic(key
, dkey
, length
) == 0)
883 while (isspace(*s
)) s
++;
892 /*************************************************
893 * Extract numbered subfield from string *
894 *************************************************/
896 /* Extracts a numbered field from a string that is divided by tokens - for
897 example a line from /etc/passwd is divided by colon characters. First field is
898 numbered one. Negative arguments count from the right. Zero returns the whole
899 string. Returns NULL if there are insufficient tokens in the string
902 Modifies final argument - this is a dynamically generated string, so that's OK.
905 field number of field to be extracted,
906 first field = 1, whole string = 0, last field = -1
907 separators characters that are used to break string into tokens
908 s points to the string from which to extract the subfield
910 Returns: NULL if the field was not found,
911 a pointer to the field's data inside s (modified to add 0)
915 expand_gettokened (int field
, uschar
*separators
, uschar
*s
)
920 uschar
*fieldtext
= NULL
;
922 if (field
== 0) return s
;
924 /* Break the line up into fields in place; for field > 0 we stop when we have
925 done the number of fields we want. For field < 0 we continue till the end of
926 the string, counting the number of fields. */
928 count
= (field
> 0)? field
: INT_MAX
;
934 /* Previous field was the last one in the string. For a positive field
935 number, this means there are not enough fields. For a negative field number,
936 check that there are enough, and scan back to find the one that is wanted. */
940 if (field
> 0 || (-field
) > (INT_MAX
- count
- 1)) return NULL
;
941 if ((-field
) == (INT_MAX
- count
- 1)) return s
;
945 while (ss
[-1] != 0) ss
--;
951 /* Previous field was not last in the string; save its start and put a
955 len
= Ustrcspn(ss
, separators
);
966 /*************************************************
967 * Extract a substring from a string *
968 *************************************************/
970 /* Perform the ${substr or ${length expansion operations.
973 subject the input string
974 value1 the offset from the start of the input string to the start of
975 the output string; if negative, count from the right.
976 value2 the length of the output string, or negative (-1) for unset
977 if value1 is positive, unset means "all after"
978 if value1 is negative, unset means "all before"
979 len set to the length of the returned string
981 Returns: pointer to the output string, or NULL if there is an error
985 extract_substr(uschar
*subject
, int value1
, int value2
, int *len
)
987 int sublen
= Ustrlen(subject
);
989 if (value1
< 0) /* count from right */
993 /* If the position is before the start, skip to the start, and adjust the
994 length. If the length ends up negative, the substring is null because nothing
995 can precede. This falls out naturally when the length is unset, meaning "all
1001 if (value2
< 0) value2
= 0;
1005 /* Otherwise an unset length => characters before value1 */
1007 else if (value2
< 0)
1014 /* For a non-negative offset, if the starting position is past the end of the
1015 string, the result will be the null string. Otherwise, an unset length means
1016 "rest"; just set it to the maximum - it will be cut down below if necessary. */
1020 if (value1
> sublen
)
1025 else if (value2
< 0) value2
= sublen
;
1028 /* Cut the length down to the maximum possible for the offset value, and get
1029 the required characters. */
1031 if (value1
+ value2
> sublen
) value2
= sublen
- value1
;
1033 return subject
+ value1
;
1039 /*************************************************
1040 * Old-style hash of a string *
1041 *************************************************/
1043 /* Perform the ${hash expansion operation.
1046 subject the input string (an expanded substring)
1047 value1 the length of the output string; if greater or equal to the
1048 length of the input string, the input string is returned
1049 value2 the number of hash characters to use, or 26 if negative
1050 len set to the length of the returned string
1052 Returns: pointer to the output string, or NULL if there is an error
1056 compute_hash(uschar
*subject
, int value1
, int value2
, int *len
)
1058 int sublen
= Ustrlen(subject
);
1060 if (value2
< 0) value2
= 26;
1061 else if (value2
> Ustrlen(hashcodes
))
1063 expand_string_message
=
1064 string_sprintf("hash count \"%d\" too big", value2
);
1068 /* Calculate the hash text. We know it is shorter than the original string, so
1069 can safely place it in subject[] (we know that subject is always itself an
1070 expanded substring). */
1072 if (value1
< sublen
)
1077 while ((c
= (subject
[j
])) != 0)
1079 int shift
= (c
+ j
++) & 7;
1080 subject
[i
] ^= (c
<< shift
) | (c
>> (8-shift
));
1081 if (++i
>= value1
) i
= 0;
1083 for (i
= 0; i
< value1
; i
++)
1084 subject
[i
] = hashcodes
[(subject
[i
]) % value2
];
1086 else value1
= sublen
;
1095 /*************************************************
1096 * Numeric hash of a string *
1097 *************************************************/
1099 /* Perform the ${nhash expansion operation. The first characters of the
1100 string are treated as most important, and get the highest prime numbers.
1103 subject the input string
1104 value1 the maximum value of the first part of the result
1105 value2 the maximum value of the second part of the result,
1106 or negative to produce only a one-part result
1107 len set to the length of the returned string
1109 Returns: pointer to the output string, or NULL if there is an error.
1113 compute_nhash (uschar
*subject
, int value1
, int value2
, int *len
)
1115 uschar
*s
= subject
;
1117 unsigned long int total
= 0; /* no overflow */
1121 if (i
== 0) i
= sizeof(prime
)/sizeof(int) - 1;
1122 total
+= prime
[i
--] * (unsigned int)(*s
++);
1125 /* If value2 is unset, just compute one number */
1129 s
= string_sprintf("%d", total
% value1
);
1132 /* Otherwise do a div/mod hash */
1136 total
= total
% (value1
* value2
);
1137 s
= string_sprintf("%d/%d", total
/value2
, total
% value2
);
1148 /*************************************************
1149 * Find the value of a header or headers *
1150 *************************************************/
1152 /* Multiple instances of the same header get concatenated, and this function
1153 can also return a concatenation of all the header lines. When concatenating
1154 specific headers that contain lists of addresses, a comma is inserted between
1155 them. Otherwise we use a straight concatenation. Because some messages can have
1156 pathologically large number of lines, there is a limit on the length that is
1157 returned. Also, to avoid massive store use which would result from using
1158 string_cat() as it copies and extends strings, we do a preliminary pass to find
1159 out exactly how much store will be needed. On "normal" messages this will be
1163 name the name of the header, without the leading $header_ or $h_,
1164 or NULL if a concatenation of all headers is required
1165 exists_only TRUE if called from a def: test; don't need to build a string;
1166 just return a string that is not "" and not "0" if the header
1168 newsize return the size of memory block that was obtained; may be NULL
1169 if exists_only is TRUE
1170 want_raw TRUE if called for $rh_ or $rheader_ variables; no processing,
1171 other than concatenating, will be done on the header. Also used
1172 for $message_headers_raw.
1173 charset name of charset to translate MIME words to; used only if
1174 want_raw is false; if NULL, no translation is done (this is
1175 used for $bh_ and $bheader_)
1177 Returns: NULL if the header does not exist, else a pointer to a new
1182 find_header(uschar
*name
, BOOL exists_only
, int *newsize
, BOOL want_raw
,
1185 BOOL found
= name
== NULL
;
1187 int len
= found
? 0 : Ustrlen(name
);
1189 uschar
*yield
= NULL
;
1192 /* Loop for two passes - saves code repetition */
1194 for (i
= 0; i
< 2; i
++)
1199 for (h
= header_list
; size
< header_insert_maxlen
&& h
!= NULL
; h
= h
->next
)
1201 if (h
->type
!= htype_old
&& h
->text
!= NULL
) /* NULL => Received: placeholder */
1203 if (name
== NULL
|| (len
<= h
->slen
&& strncmpic(name
, h
->text
, len
) == 0))
1208 if (exists_only
) return US
"1"; /* don't need actual string */
1210 t
= h
->text
+ len
; /* text to insert */
1211 if (!want_raw
) /* unless wanted raw, */
1212 while (isspace(*t
)) t
++; /* remove leading white space */
1213 ilen
= h
->slen
- (t
- h
->text
); /* length to insert */
1215 /* Unless wanted raw, remove trailing whitespace, including the
1219 while (ilen
> 0 && isspace(t
[ilen
-1])) ilen
--;
1221 /* Set comma = 1 if handling a single header and it's one of those
1222 that contains an address list, except when asked for raw headers. Only
1223 need to do this once. */
1225 if (!want_raw
&& name
!= NULL
&& comma
== 0 &&
1226 Ustrchr("BCFRST", h
->type
) != NULL
)
1229 /* First pass - compute total store needed; second pass - compute
1230 total store used, including this header. */
1232 size
+= ilen
+ comma
+ 1; /* +1 for the newline */
1234 /* Second pass - concatentate the data, up to a maximum. Note that
1235 the loop stops when size hits the limit. */
1239 if (size
> header_insert_maxlen
)
1241 ilen
-= size
- header_insert_maxlen
- 1;
1244 Ustrncpy(ptr
, t
, ilen
);
1247 /* For a non-raw header, put in the comma if needed, then add
1248 back the newline we removed above, provided there was some text in
1251 if (!want_raw
&& ilen
> 0)
1253 if (comma
!= 0) *ptr
++ = ',';
1261 /* At end of first pass, return NULL if no header found. Then truncate size
1262 if necessary, and get the buffer to hold the data, returning the buffer size.
1267 if (!found
) return NULL
;
1268 if (size
> header_insert_maxlen
) size
= header_insert_maxlen
;
1269 *newsize
= size
+ 1;
1270 ptr
= yield
= store_get(*newsize
);
1274 /* That's all we do for raw header expansion. */
1281 /* Otherwise, remove a final newline and a redundant added comma. Then we do
1282 RFC 2047 decoding, translating the charset if requested. The rfc2047_decode2()
1283 function can return an error with decoded data if the charset translation
1284 fails. If decoding fails, it returns NULL. */
1288 uschar
*decoded
, *error
;
1289 if (ptr
> yield
&& ptr
[-1] == '\n') ptr
--;
1290 if (ptr
> yield
&& comma
!= 0 && ptr
[-1] == ',') ptr
--;
1292 decoded
= rfc2047_decode2(yield
, check_rfc2047_length
, charset
, '?', NULL
,
1296 DEBUG(D_any
) debug_printf("*** error in RFC 2047 decoding: %s\n"
1297 " input was: %s\n", error
, yield
);
1299 if (decoded
!= NULL
) yield
= decoded
;
1308 /*************************************************
1309 * Find value of a variable *
1310 *************************************************/
1312 /* The table of variables is kept in alphabetic order, so we can search it
1313 using a binary chop. The "choplen" variable is nothing to do with the binary
1317 name the name of the variable being sought
1318 exists_only TRUE if this is a def: test; passed on to find_header()
1319 skipping TRUE => skip any processing evaluation; this is not the same as
1320 exists_only because def: may test for values that are first
1322 newsize pointer to an int which is initially zero; if the answer is in
1323 a new memory buffer, *newsize is set to its size
1325 Returns: NULL if the variable does not exist, or
1326 a pointer to the variable's contents, or
1327 something non-NULL if exists_only is TRUE
1331 find_variable(uschar
*name
, BOOL exists_only
, BOOL skipping
, int *newsize
)
1334 int last
= var_table_size
;
1336 /* Handle ACL variables, whose names are of the form acl_cxxx or acl_mxxx.
1337 Originally, xxx had to be a number in the range 0-9 (later 0-19), but from
1338 release 4.64 onwards arbitrary names are permitted, as long as the first 5
1339 characters are acl_c or acl_m and the sixth is either a digit or an underscore
1340 (this gave backwards compatibility at the changeover). There may be built-in
1341 variables whose names start acl_ but they should never start in this way. This
1342 slightly messy specification is a consequence of the history, needless to say.
1344 If an ACL variable does not exist, treat it as empty, unless strict_acl_vars is
1345 set, in which case give an error. */
1347 if ((Ustrncmp(name
, "acl_c", 5) == 0 || Ustrncmp(name
, "acl_m", 5) == 0) &&
1351 tree_search((name
[4] == 'c')? acl_var_c
: acl_var_m
, name
+ 4);
1352 return (node
== NULL
)? (strict_acl_vars
? NULL
: US
"") : node
->data
.ptr
;
1355 /* Handle $auth<n> variables. */
1357 if (Ustrncmp(name
, "auth", 4) == 0)
1360 int n
= Ustrtoul(name
+ 4, &endptr
, 10);
1361 if (*endptr
== 0 && n
!= 0 && n
<= AUTH_VARS
)
1362 return (auth_vars
[n
-1] == NULL
)? US
"" : auth_vars
[n
-1];
1365 /* For all other variables, search the table */
1367 while (last
> first
)
1371 int middle
= (first
+ last
)/2;
1372 int c
= Ustrcmp(name
, var_table
[middle
].name
);
1374 if (c
> 0) { first
= middle
+ 1; continue; }
1375 if (c
< 0) { last
= middle
; continue; }
1377 /* Found an existing variable. If in skipping state, the value isn't needed,
1378 and we want to avoid processing (such as looking up the host name). */
1380 if (skipping
) return US
"";
1382 switch (var_table
[middle
].type
)
1384 #ifdef EXPERIMENTAL_DOMAINKEYS
1386 case vtype_dk_verify
:
1387 if (dk_verify_block
== NULL
) return US
"";
1389 if (Ustrcmp(var_table
[middle
].name
, "dk_result") == 0)
1390 s
= dk_verify_block
->result_string
;
1391 if (Ustrcmp(var_table
[middle
].name
, "dk_sender") == 0)
1392 s
= dk_verify_block
->address
;
1393 if (Ustrcmp(var_table
[middle
].name
, "dk_sender_domain") == 0)
1394 s
= dk_verify_block
->domain
;
1395 if (Ustrcmp(var_table
[middle
].name
, "dk_sender_local_part") == 0)
1396 s
= dk_verify_block
->local_part
;
1398 if (Ustrcmp(var_table
[middle
].name
, "dk_sender_source") == 0)
1399 switch(dk_verify_block
->address_source
) {
1400 case DK_EXIM_ADDRESS_NONE
: s
= US
"0"; break;
1401 case DK_EXIM_ADDRESS_FROM_FROM
: s
= US
"from"; break;
1402 case DK_EXIM_ADDRESS_FROM_SENDER
: s
= US
"sender"; break;
1405 if (Ustrcmp(var_table
[middle
].name
, "dk_status") == 0)
1406 switch(dk_verify_block
->result
) {
1407 case DK_EXIM_RESULT_ERR
: s
= US
"error"; break;
1408 case DK_EXIM_RESULT_BAD_FORMAT
: s
= US
"bad format"; break;
1409 case DK_EXIM_RESULT_NO_KEY
: s
= US
"no key"; break;
1410 case DK_EXIM_RESULT_NO_SIGNATURE
: s
= US
"no signature"; break;
1411 case DK_EXIM_RESULT_REVOKED
: s
= US
"revoked"; break;
1412 case DK_EXIM_RESULT_NON_PARTICIPANT
: s
= US
"non-participant"; break;
1413 case DK_EXIM_RESULT_GOOD
: s
= US
"good"; break;
1414 case DK_EXIM_RESULT_BAD
: s
= US
"bad"; break;
1417 if (Ustrcmp(var_table
[middle
].name
, "dk_signsall") == 0)
1418 s
= (dk_verify_block
->signsall
)? US
"1" : US
"0";
1420 if (Ustrcmp(var_table
[middle
].name
, "dk_testing") == 0)
1421 s
= (dk_verify_block
->testing
)? US
"1" : US
"0";
1423 if (Ustrcmp(var_table
[middle
].name
, "dk_is_signed") == 0)
1424 s
= (dk_verify_block
->is_signed
)? US
"1" : US
"0";
1426 return (s
== NULL
)? US
"" : s
;
1429 case vtype_filter_int
:
1430 if (!filter_running
) return NULL
;
1434 sprintf(CS var_buffer
, "%d", *(int *)(var_table
[middle
].value
)); /* Integer */
1438 sprintf(CS var_buffer
, "%ld", (long int)(*(ino_t
*)(var_table
[middle
].value
))); /* Inode */
1442 sprintf(CS var_buffer
, "%ld", (long int)(*(gid_t
*)(var_table
[middle
].value
))); /* gid */
1446 sprintf(CS var_buffer
, "%ld", (long int)(*(uid_t
*)(var_table
[middle
].value
))); /* uid */
1449 case vtype_stringptr
: /* Pointer to string */
1450 s
= *((uschar
**)(var_table
[middle
].value
));
1451 return (s
== NULL
)? US
"" : s
;
1454 sprintf(CS var_buffer
, "%d", (int)getpid()); /* pid */
1457 case vtype_load_avg
:
1458 sprintf(CS var_buffer
, "%d", OS_GETLOADAVG()); /* load_average */
1461 case vtype_host_lookup
: /* Lookup if not done so */
1462 if (sender_host_name
== NULL
&& sender_host_address
!= NULL
&&
1463 !host_lookup_failed
&& host_name_lookup() == OK
)
1464 host_build_sender_fullhost();
1465 return (sender_host_name
== NULL
)? US
"" : sender_host_name
;
1467 case vtype_localpart
: /* Get local part from address */
1468 s
= *((uschar
**)(var_table
[middle
].value
));
1469 if (s
== NULL
) return US
"";
1470 domain
= Ustrrchr(s
, '@');
1471 if (domain
== NULL
) return s
;
1472 if (domain
- s
> sizeof(var_buffer
) - 1)
1473 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "local part longer than %d in "
1474 "string expansion", sizeof(var_buffer
));
1475 Ustrncpy(var_buffer
, s
, domain
- s
);
1476 var_buffer
[domain
- s
] = 0;
1479 case vtype_domain
: /* Get domain from address */
1480 s
= *((uschar
**)(var_table
[middle
].value
));
1481 if (s
== NULL
) return US
"";
1482 domain
= Ustrrchr(s
, '@');
1483 return (domain
== NULL
)? US
"" : domain
+ 1;
1485 case vtype_msgheaders
:
1486 return find_header(NULL
, exists_only
, newsize
, FALSE
, NULL
);
1488 case vtype_msgheaders_raw
:
1489 return find_header(NULL
, exists_only
, newsize
, TRUE
, NULL
);
1491 case vtype_msgbody
: /* Pointer to msgbody string */
1492 case vtype_msgbody_end
: /* Ditto, the end of the msg */
1493 ss
= (uschar
**)(var_table
[middle
].value
);
1494 if (*ss
== NULL
&& deliver_datafile
>= 0) /* Read body when needed */
1497 off_t start_offset
= SPOOL_DATA_START_OFFSET
;
1498 int len
= message_body_visible
;
1499 if (len
> message_size
) len
= message_size
;
1500 *ss
= body
= store_malloc(len
+1);
1502 if (var_table
[middle
].type
== vtype_msgbody_end
)
1504 struct stat statbuf
;
1505 if (fstat(deliver_datafile
, &statbuf
) == 0)
1507 start_offset
= statbuf
.st_size
- len
;
1508 if (start_offset
< SPOOL_DATA_START_OFFSET
)
1509 start_offset
= SPOOL_DATA_START_OFFSET
;
1512 lseek(deliver_datafile
, start_offset
, SEEK_SET
);
1513 len
= read(deliver_datafile
, body
, len
);
1517 if (message_body_newlines
) /* Separate loops for efficiency */
1520 { if (body
[--len
] == 0) body
[len
] = ' '; }
1525 { if (body
[--len
] == '\n' || body
[len
] == 0) body
[len
] = ' '; }
1529 return (*ss
== NULL
)? US
"" : *ss
;
1531 case vtype_todbsdin
: /* BSD inbox time of day */
1532 return tod_stamp(tod_bsdin
);
1534 case vtype_tode
: /* Unix epoch time of day */
1535 return tod_stamp(tod_epoch
);
1537 case vtype_todf
: /* Full time of day */
1538 return tod_stamp(tod_full
);
1540 case vtype_todl
: /* Log format time of day */
1541 return tod_stamp(tod_log_bare
); /* (without timezone) */
1543 case vtype_todzone
: /* Time zone offset only */
1544 return tod_stamp(tod_zone
);
1546 case vtype_todzulu
: /* Zulu time */
1547 return tod_stamp(tod_zulu
);
1549 case vtype_todlf
: /* Log file datestamp tod */
1550 return tod_stamp(tod_log_datestamp
);
1552 case vtype_reply
: /* Get reply address */
1553 s
= find_header(US
"reply-to:", exists_only
, newsize
, TRUE
,
1555 if (s
!= NULL
) while (isspace(*s
)) s
++;
1556 if (s
== NULL
|| *s
== 0)
1558 *newsize
= 0; /* For the *s==0 case */
1559 s
= find_header(US
"from:", exists_only
, newsize
, TRUE
, headers_charset
);
1564 while (isspace(*s
)) s
++;
1565 for (t
= s
; *t
!= 0; t
++) if (*t
== '\n') *t
= ' ';
1566 while (t
> s
&& isspace(t
[-1])) t
--;
1569 return (s
== NULL
)? US
"" : s
;
1571 /* A recipients list is available only during system message filtering,
1572 during ACL processing after DATA, and while expanding pipe commands
1573 generated from a system filter, but not elsewhere. */
1575 case vtype_recipients
:
1576 if (!enable_dollar_recipients
) return NULL
; else
1581 s
= store_get(size
);
1582 for (i
= 0; i
< recipients_count
; i
++)
1584 if (i
!= 0) s
= string_cat(s
, &size
, &ptr
, US
", ", 2);
1585 s
= string_cat(s
, &size
, &ptr
, recipients_list
[i
].address
,
1586 Ustrlen(recipients_list
[i
].address
));
1588 s
[ptr
] = 0; /* string_cat() leaves room */
1595 sprintf(CS var_buffer
, "%d",
1596 receive_statvfs(var_table
[middle
].value
== (void *)TRUE
, &inodes
));
1603 (void) receive_statvfs(var_table
[middle
].value
== (void *)TRUE
, &inodes
);
1604 sprintf(CS var_buffer
, "%d", inodes
);
1610 return NULL
; /* Unknown variable name */
1616 /*************************************************
1617 * Read and expand substrings *
1618 *************************************************/
1620 /* This function is called to read and expand argument substrings for various
1621 expansion items. Some have a minimum requirement that is less than the maximum;
1622 in these cases, the first non-present one is set to NULL.
1625 sub points to vector of pointers to set
1626 n maximum number of substrings
1628 sptr points to current string pointer
1629 skipping the skipping flag
1630 check_end if TRUE, check for final '}'
1631 name name of item, for error message
1633 Returns: 0 OK; string pointer updated
1634 1 curly bracketing error (too few arguments)
1635 2 too many arguments (only if check_end is set); message set
1636 3 other error (expansion failure)
1640 read_subs(uschar
**sub
, int n
, int m
, uschar
**sptr
, BOOL skipping
,
1641 BOOL check_end
, uschar
*name
)
1646 while (isspace(*s
)) s
++;
1647 for (i
= 0; i
< n
; i
++)
1651 if (i
< m
) return 1;
1655 sub
[i
] = expand_string_internal(s
+1, TRUE
, &s
, skipping
);
1656 if (sub
[i
] == NULL
) return 3;
1657 if (*s
++ != '}') return 1;
1658 while (isspace(*s
)) s
++;
1660 if (check_end
&& *s
++ != '}')
1664 expand_string_message
= string_sprintf("Too many arguments for \"%s\" "
1665 "(max is %d)", name
, n
);
1678 /*************************************************
1679 * Elaborate message for bad variable *
1680 *************************************************/
1682 /* For the "unknown variable" message, take a look at the variable's name, and
1683 give additional information about possible ACL variables. The extra information
1684 is added on to expand_string_message.
1686 Argument: the name of the variable
1691 check_variable_error_message(uschar
*name
)
1693 if (Ustrncmp(name
, "acl_", 4) == 0)
1694 expand_string_message
= string_sprintf("%s (%s)", expand_string_message
,
1695 (name
[4] == 'c' || name
[4] == 'm')?
1697 US
"6th character of a user-defined ACL variable must be a digit or underscore" :
1698 US
"strict_acl_vars is set" /* Syntax is OK, it has to be this */
1700 US
"user-defined ACL variables must start acl_c or acl_m");
1705 /*************************************************
1706 * Read and evaluate a condition *
1707 *************************************************/
1711 s points to the start of the condition text
1712 yield points to a BOOL to hold the result of the condition test;
1713 if NULL, we are just reading through a condition that is
1714 part of an "or" combination to check syntax, or in a state
1715 where the answer isn't required
1717 Returns: a pointer to the first character after the condition, or
1722 eval_condition(uschar
*s
, BOOL
*yield
)
1724 BOOL testfor
= TRUE
;
1725 BOOL tempcond
, combined_cond
;
1727 int i
, rc
, cond_type
, roffset
;
1729 struct stat statbuf
;
1734 const uschar
*rerror
;
1738 while (isspace(*s
)) s
++;
1739 if (*s
== '!') { testfor
= !testfor
; s
++; } else break;
1742 /* Numeric comparisons are symbolic */
1744 if (*s
== '=' || *s
== '>' || *s
== '<')
1756 /* All other conditions are named */
1758 else s
= read_name(name
, 256, s
, US
"_");
1760 /* If we haven't read a name, it means some non-alpha character is first. */
1764 expand_string_message
= string_sprintf("condition name expected, "
1765 "but found \"%.16s\"", s
);
1769 /* Find which condition we are dealing with, and switch on it */
1771 cond_type
= chop_match(name
, cond_table
, sizeof(cond_table
)/sizeof(uschar
*));
1774 /* def: tests for a non-empty variable, or for the existence of a header. If
1775 yield == NULL we are in a skipping state, and don't care about the answer. */
1780 expand_string_message
= US
"\":\" expected after \"def\"";
1784 s
= read_name(name
, 256, s
+1, US
"_");
1786 /* Test for a header's existence. If the name contains a closing brace
1787 character, this may be a user error where the terminating colon has been
1788 omitted. Set a flag to adjust a subsequent error message in this case. */
1790 if (Ustrncmp(name
, "h_", 2) == 0 ||
1791 Ustrncmp(name
, "rh_", 3) == 0 ||
1792 Ustrncmp(name
, "bh_", 3) == 0 ||
1793 Ustrncmp(name
, "header_", 7) == 0 ||
1794 Ustrncmp(name
, "rheader_", 8) == 0 ||
1795 Ustrncmp(name
, "bheader_", 8) == 0)
1797 s
= read_header_name(name
, 256, s
);
1798 if (Ustrchr(name
, '}') != NULL
) malformed_header
= TRUE
;
1799 if (yield
!= NULL
) *yield
=
1800 (find_header(name
, TRUE
, NULL
, FALSE
, NULL
) != NULL
) == testfor
;
1803 /* Test for a variable's having a non-empty value. A non-existent variable
1804 causes an expansion failure. */
1808 uschar
*value
= find_variable(name
, TRUE
, yield
== NULL
, NULL
);
1811 expand_string_message
= (name
[0] == 0)?
1812 string_sprintf("variable name omitted after \"def:\"") :
1813 string_sprintf("unknown variable \"%s\" after \"def:\"", name
);
1814 check_variable_error_message(name
);
1817 if (yield
!= NULL
) *yield
= (value
[0] != 0) == testfor
;
1823 /* first_delivery tests for first delivery attempt */
1825 case ECOND_FIRST_DELIVERY
:
1826 if (yield
!= NULL
) *yield
= deliver_firsttime
== testfor
;
1830 /* queue_running tests for any process started by a queue runner */
1832 case ECOND_QUEUE_RUNNING
:
1833 if (yield
!= NULL
) *yield
= (queue_run_pid
!= (pid_t
)0) == testfor
;
1837 /* exists: tests for file existence
1838 isip: tests for any IP address
1839 isip4: tests for an IPv4 address
1840 isip6: tests for an IPv6 address
1841 pam: does PAM authentication
1842 radius: does RADIUS authentication
1843 ldapauth: does LDAP authentication
1844 pwcheck: does Cyrus SASL pwcheck authentication
1853 case ECOND_LDAPAUTH
:
1856 while (isspace(*s
)) s
++;
1857 if (*s
!= '{') goto COND_FAILED_CURLY_START
;
1859 sub
[0] = expand_string_internal(s
+1, TRUE
, &s
, yield
== NULL
);
1860 if (sub
[0] == NULL
) return NULL
;
1861 if (*s
++ != '}') goto COND_FAILED_CURLY_END
;
1863 if (yield
== NULL
) return s
; /* No need to run the test if skipping */
1868 if ((expand_forbid
& RDO_EXISTS
) != 0)
1870 expand_string_message
= US
"File existence tests are not permitted";
1873 *yield
= (Ustat(sub
[0], &statbuf
) == 0) == testfor
;
1879 rc
= string_is_ip_address(sub
[0], NULL
);
1880 *yield
= ((cond_type
== ECOND_ISIP
)? (rc
!= 0) :
1881 (cond_type
== ECOND_ISIP4
)? (rc
== 4) : (rc
== 6)) == testfor
;
1884 /* Various authentication tests - all optionally compiled */
1888 rc
= auth_call_pam(sub
[0], &expand_string_message
);
1891 goto COND_FAILED_NOT_COMPILED
;
1892 #endif /* SUPPORT_PAM */
1895 #ifdef RADIUS_CONFIG_FILE
1896 rc
= auth_call_radius(sub
[0], &expand_string_message
);
1899 goto COND_FAILED_NOT_COMPILED
;
1900 #endif /* RADIUS_CONFIG_FILE */
1902 case ECOND_LDAPAUTH
:
1905 /* Just to keep the interface the same */
1907 int old_pool
= store_pool
;
1908 store_pool
= POOL_SEARCH
;
1909 rc
= eldapauth_find((void *)(-1), NULL
, sub
[0], Ustrlen(sub
[0]), NULL
,
1910 &expand_string_message
, &do_cache
);
1911 store_pool
= old_pool
;
1915 goto COND_FAILED_NOT_COMPILED
;
1916 #endif /* LOOKUP_LDAP */
1919 #ifdef CYRUS_PWCHECK_SOCKET
1920 rc
= auth_call_pwcheck(sub
[0], &expand_string_message
);
1923 goto COND_FAILED_NOT_COMPILED
;
1924 #endif /* CYRUS_PWCHECK_SOCKET */
1926 #if defined(SUPPORT_PAM) || defined(RADIUS_CONFIG_FILE) || \
1927 defined(LOOKUP_LDAP) || defined(CYRUS_PWCHECK_SOCKET)
1929 if (rc
== ERROR
|| rc
== DEFER
) return NULL
;
1930 *yield
= (rc
== OK
) == testfor
;
1936 /* saslauthd: does Cyrus saslauthd authentication. Four parameters are used:
1938 ${if saslauthd {{username}{password}{service}{realm}} {yes}[no}}
1940 However, the last two are optional. That is why the whole set is enclosed
1941 in their own set or braces. */
1943 case ECOND_SASLAUTHD
:
1944 #ifndef CYRUS_SASLAUTHD_SOCKET
1945 goto COND_FAILED_NOT_COMPILED
;
1947 while (isspace(*s
)) s
++;
1948 if (*s
++ != '{') goto COND_FAILED_CURLY_START
;
1949 switch(read_subs(sub
, 4, 2, &s
, yield
== NULL
, TRUE
, US
"saslauthd"))
1951 case 1: expand_string_message
= US
"too few arguments or bracketing "
1952 "error for saslauthd";
1954 case 3: return NULL
;
1956 if (sub
[2] == NULL
) sub
[3] = NULL
; /* realm if no service */
1960 rc
= auth_call_saslauthd(sub
[0], sub
[1], sub
[2], sub
[3],
1961 &expand_string_message
);
1962 if (rc
== ERROR
|| rc
== DEFER
) return NULL
;
1963 *yield
= (rc
== OK
) == testfor
;
1966 #endif /* CYRUS_SASLAUTHD_SOCKET */
1969 /* symbolic operators for numeric and string comparison, and a number of
1970 other operators, all requiring two arguments.
1972 match: does a regular expression match and sets up the numerical
1973 variables if it succeeds
1974 match_address: matches in an address list
1975 match_domain: matches in a domain list
1976 match_ip: matches a host list that is restricted to IP addresses
1977 match_local_part: matches in a local part list
1978 crypteq: encrypts plaintext and compares against an encrypted text,
1979 using crypt(), crypt16(), MD5 or SHA-1
1983 case ECOND_MATCH_ADDRESS
:
1984 case ECOND_MATCH_DOMAIN
:
1985 case ECOND_MATCH_IP
:
1986 case ECOND_MATCH_LOCAL_PART
:
1989 case ECOND_NUM_L
: /* Numerical comparisons */
1996 case ECOND_STR_LT
: /* String comparisons */
2007 for (i
= 0; i
< 2; i
++)
2009 while (isspace(*s
)) s
++;
2012 if (i
== 0) goto COND_FAILED_CURLY_START
;
2013 expand_string_message
= string_sprintf("missing 2nd string in {} "
2014 "after \"%s\"", name
);
2017 sub
[i
] = expand_string_internal(s
+1, TRUE
, &s
, yield
== NULL
);
2018 if (sub
[i
] == NULL
) return NULL
;
2019 if (*s
++ != '}') goto COND_FAILED_CURLY_END
;
2021 /* Convert to numerical if required; we know that the names of all the
2022 conditions that compare numbers do not start with a letter. This just saves
2023 checking for them individually. */
2025 if (!isalpha(name
[0]) && yield
!= NULL
)
2031 debug_printf("empty string cast to zero for numerical comparison\n");
2035 num
[i
] = expand_string_integer(sub
[i
], FALSE
);
2036 if (expand_string_message
!= NULL
) return NULL
;
2041 /* Result not required */
2043 if (yield
== NULL
) return s
;
2045 /* Do an appropriate comparison */
2051 *yield
= (num
[0] == num
[1]) == testfor
;
2055 *yield
= (num
[0] > num
[1]) == testfor
;
2059 *yield
= (num
[0] >= num
[1]) == testfor
;
2063 *yield
= (num
[0] < num
[1]) == testfor
;
2067 *yield
= (num
[0] <= num
[1]) == testfor
;
2071 *yield
= (Ustrcmp(sub
[0], sub
[1]) < 0) == testfor
;
2075 *yield
= (strcmpic(sub
[0], sub
[1]) < 0) == testfor
;
2079 *yield
= (Ustrcmp(sub
[0], sub
[1]) <= 0) == testfor
;
2083 *yield
= (strcmpic(sub
[0], sub
[1]) <= 0) == testfor
;
2087 *yield
= (Ustrcmp(sub
[0], sub
[1]) == 0) == testfor
;
2091 *yield
= (strcmpic(sub
[0], sub
[1]) == 0) == testfor
;
2095 *yield
= (Ustrcmp(sub
[0], sub
[1]) > 0) == testfor
;
2099 *yield
= (strcmpic(sub
[0], sub
[1]) > 0) == testfor
;
2103 *yield
= (Ustrcmp(sub
[0], sub
[1]) >= 0) == testfor
;
2107 *yield
= (strcmpic(sub
[0], sub
[1]) >= 0) == testfor
;
2110 case ECOND_MATCH
: /* Regular expression match */
2111 re
= pcre_compile(CS sub
[1], PCRE_COPT
, (const char **)&rerror
, &roffset
,
2115 expand_string_message
= string_sprintf("regular expression error in "
2116 "\"%s\": %s at offset %d", sub
[1], rerror
, roffset
);
2119 *yield
= regex_match_and_setup(re
, sub
[0], 0, -1) == testfor
;
2122 case ECOND_MATCH_ADDRESS
: /* Match in an address list */
2123 rc
= match_address_list(sub
[0], TRUE
, FALSE
, &(sub
[1]), NULL
, -1, 0, NULL
);
2124 goto MATCHED_SOMETHING
;
2126 case ECOND_MATCH_DOMAIN
: /* Match in a domain list */
2127 rc
= match_isinlist(sub
[0], &(sub
[1]), 0, &domainlist_anchor
, NULL
,
2128 MCL_DOMAIN
+ MCL_NOEXPAND
, TRUE
, NULL
);
2129 goto MATCHED_SOMETHING
;
2131 case ECOND_MATCH_IP
: /* Match IP address in a host list */
2132 if (sub
[0][0] != 0 && string_is_ip_address(sub
[0], NULL
) == 0)
2134 expand_string_message
= string_sprintf("\"%s\" is not an IP address",
2140 unsigned int *nullcache
= NULL
;
2141 check_host_block cb
;
2143 cb
.host_name
= US
"";
2144 cb
.host_address
= sub
[0];
2146 /* If the host address starts off ::ffff: it is an IPv6 address in
2147 IPv4-compatible mode. Find the IPv4 part for checking against IPv4
2150 cb
.host_ipv4
= (Ustrncmp(cb
.host_address
, "::ffff:", 7) == 0)?
2151 cb
.host_address
+ 7 : cb
.host_address
;
2153 rc
= match_check_list(
2154 &sub
[1], /* the list */
2155 0, /* separator character */
2156 &hostlist_anchor
, /* anchor pointer */
2157 &nullcache
, /* cache pointer */
2158 check_host
, /* function for testing */
2159 &cb
, /* argument for function */
2160 MCL_HOST
, /* type of check */
2161 sub
[0], /* text for debugging */
2162 NULL
); /* where to pass back data */
2164 goto MATCHED_SOMETHING
;
2166 case ECOND_MATCH_LOCAL_PART
:
2167 rc
= match_isinlist(sub
[0], &(sub
[1]), 0, &localpartlist_anchor
, NULL
,
2168 MCL_LOCALPART
+ MCL_NOEXPAND
, TRUE
, NULL
);
2183 expand_string_message
= string_sprintf("unable to complete match "
2184 "against \"%s\": %s", sub
[1], search_error_message
);
2190 /* Various "encrypted" comparisons. If the second string starts with
2191 "{" then an encryption type is given. Default to crypt() or crypt16()
2192 (build-time choice). */
2195 #ifndef SUPPORT_CRYPTEQ
2196 goto COND_FAILED_NOT_COMPILED
;
2198 if (strncmpic(sub
[1], US
"{md5}", 5) == 0)
2200 int sublen
= Ustrlen(sub
[1]+5);
2205 md5_end(&base
, (uschar
*)sub
[0], Ustrlen(sub
[0]), digest
);
2207 /* If the length that we are comparing against is 24, the MD5 digest
2208 is expressed as a base64 string. This is the way LDAP does it. However,
2209 some other software uses a straightforward hex representation. We assume
2210 this if the length is 32. Other lengths fail. */
2214 uschar
*coded
= auth_b64encode((uschar
*)digest
, 16);
2215 DEBUG(D_auth
) debug_printf("crypteq: using MD5+B64 hashing\n"
2216 " subject=%s\n crypted=%s\n", coded
, sub
[1]+5);
2217 *yield
= (Ustrcmp(coded
, sub
[1]+5) == 0) == testfor
;
2219 else if (sublen
== 32)
2223 for (i
= 0; i
< 16; i
++) sprintf(CS (coded
+2*i
), "%02X", digest
[i
]);
2225 DEBUG(D_auth
) debug_printf("crypteq: using MD5+hex hashing\n"
2226 " subject=%s\n crypted=%s\n", coded
, sub
[1]+5);
2227 *yield
= (strcmpic(coded
, sub
[1]+5) == 0) == testfor
;
2231 DEBUG(D_auth
) debug_printf("crypteq: length for MD5 not 24 or 32: "
2232 "fail\n crypted=%s\n", sub
[1]+5);
2237 else if (strncmpic(sub
[1], US
"{sha1}", 6) == 0)
2239 int sublen
= Ustrlen(sub
[1]+6);
2244 sha1_end(&base
, (uschar
*)sub
[0], Ustrlen(sub
[0]), digest
);
2246 /* If the length that we are comparing against is 28, assume the SHA1
2247 digest is expressed as a base64 string. If the length is 40, assume a
2248 straightforward hex representation. Other lengths fail. */
2252 uschar
*coded
= auth_b64encode((uschar
*)digest
, 20);
2253 DEBUG(D_auth
) debug_printf("crypteq: using SHA1+B64 hashing\n"
2254 " subject=%s\n crypted=%s\n", coded
, sub
[1]+6);
2255 *yield
= (Ustrcmp(coded
, sub
[1]+6) == 0) == testfor
;
2257 else if (sublen
== 40)
2261 for (i
= 0; i
< 20; i
++) sprintf(CS (coded
+2*i
), "%02X", digest
[i
]);
2263 DEBUG(D_auth
) debug_printf("crypteq: using SHA1+hex hashing\n"
2264 " subject=%s\n crypted=%s\n", coded
, sub
[1]+6);
2265 *yield
= (strcmpic(coded
, sub
[1]+6) == 0) == testfor
;
2269 DEBUG(D_auth
) debug_printf("crypteq: length for SHA-1 not 28 or 40: "
2270 "fail\n crypted=%s\n", sub
[1]+6);
2275 else /* {crypt} or {crypt16} and non-{ at start */
2280 if (strncmpic(sub
[1], US
"{crypt}", 7) == 0)
2285 else if (strncmpic(sub
[1], US
"{crypt16}", 9) == 0)
2290 else if (sub
[1][0] == '{')
2292 expand_string_message
= string_sprintf("unknown encryption mechanism "
2293 "in \"%s\"", sub
[1]);
2299 case 0: coded
= US
DEFAULT_CRYPT(CS sub
[0], CS sub
[1]); break;
2300 case 1: coded
= US
crypt(CS sub
[0], CS sub
[1]); break;
2301 default: coded
= US
crypt16(CS sub
[0], CS sub
[1]); break;
2305 #define XSTR(s) STR(s)
2306 DEBUG(D_auth
) debug_printf("crypteq: using %s()\n"
2307 " subject=%s\n crypted=%s\n",
2308 (which
== 0)? XSTR(DEFAULT_CRYPT
) : (which
== 1)? "crypt" : "crypt16",
2313 /* If the encrypted string contains fewer than two characters (for the
2314 salt), force failure. Otherwise we get false positives: with an empty
2315 string the yield of crypt() is an empty string! */
2317 *yield
= (Ustrlen(sub
[1]) < 2)? !testfor
:
2318 (Ustrcmp(coded
, sub
[1]) == 0) == testfor
;
2321 #endif /* SUPPORT_CRYPTEQ */
2322 } /* Switch for comparison conditions */
2324 return s
; /* End of comparison conditions */
2327 /* and/or: computes logical and/or of several conditions */
2331 subcondptr
= (yield
== NULL
)? NULL
: &tempcond
;
2332 combined_cond
= (cond_type
== ECOND_AND
);
2334 while (isspace(*s
)) s
++;
2335 if (*s
++ != '{') goto COND_FAILED_CURLY_START
;
2339 while (isspace(*s
)) s
++;
2340 if (*s
== '}') break;
2343 expand_string_message
= string_sprintf("each subcondition "
2344 "inside an \"%s{...}\" condition must be in its own {}", name
);
2348 s
= eval_condition(s
+1, subcondptr
);
2351 expand_string_message
= string_sprintf("%s inside \"%s{...}\" condition",
2352 expand_string_message
, name
);
2355 while (isspace(*s
)) s
++;
2359 expand_string_message
= string_sprintf("missing } at end of condition "
2360 "inside \"%s\" group", name
);
2366 if (cond_type
== ECOND_AND
)
2368 combined_cond
&= tempcond
;
2369 if (!combined_cond
) subcondptr
= NULL
; /* once false, don't */
2370 } /* evaluate any more */
2373 combined_cond
|= tempcond
;
2374 if (combined_cond
) subcondptr
= NULL
; /* once true, don't */
2375 } /* evaluate any more */
2379 if (yield
!= NULL
) *yield
= (combined_cond
== testfor
);
2383 /* forall/forany: iterates a condition with different values */
2389 uschar
*save_iterate_item
= iterate_item
;
2391 while (isspace(*s
)) s
++;
2392 if (*s
++ != '{') goto COND_FAILED_CURLY_START
;
2393 sub
[0] = expand_string_internal(s
, TRUE
, &s
, (yield
== NULL
));
2394 if (sub
[0] == NULL
) return NULL
;
2395 if (*s
++ != '}') goto COND_FAILED_CURLY_END
;
2397 while (isspace(*s
)) s
++;
2398 if (*s
++ != '{') goto COND_FAILED_CURLY_START
;
2402 /* Call eval_condition once, with result discarded (as if scanning a
2403 "false" part). This allows us to find the end of the condition, because if
2404 the list it empty, we won't actually evaluate the condition for real. */
2406 s
= eval_condition(sub
[1], NULL
);
2409 expand_string_message
= string_sprintf("%s inside \"%s\" condition",
2410 expand_string_message
, name
);
2413 while (isspace(*s
)) s
++;
2417 expand_string_message
= string_sprintf("missing } at end of condition "
2418 "inside \"%s\"", name
);
2422 if (yield
!= NULL
) *yield
= !testfor
;
2423 while ((iterate_item
= string_nextinlist(&sub
[0], &sep
, NULL
, 0)) != NULL
)
2425 DEBUG(D_expand
) debug_printf("%s: $item = \"%s\"\n", name
, iterate_item
);
2426 if (eval_condition(sub
[1], &tempcond
) == NULL
)
2428 expand_string_message
= string_sprintf("%s inside \"%s\" condition",
2429 expand_string_message
, name
);
2430 iterate_item
= save_iterate_item
;
2433 DEBUG(D_expand
) debug_printf("%s: condition evaluated to %s\n", name
,
2434 tempcond
? "true":"false");
2436 if (yield
!= NULL
) *yield
= (tempcond
== testfor
);
2437 if (tempcond
== (cond_type
== ECOND_FORANY
)) break;
2440 iterate_item
= save_iterate_item
;
2445 /* Unknown condition */
2448 expand_string_message
= string_sprintf("unknown condition \"%s\"", name
);
2450 } /* End switch on condition type */
2452 /* Missing braces at start and end of data */
2454 COND_FAILED_CURLY_START
:
2455 expand_string_message
= string_sprintf("missing { after \"%s\"", name
);
2458 COND_FAILED_CURLY_END
:
2459 expand_string_message
= string_sprintf("missing } at end of \"%s\" condition",
2463 /* A condition requires code that is not compiled */
2465 #if !defined(SUPPORT_PAM) || !defined(RADIUS_CONFIG_FILE) || \
2466 !defined(LOOKUP_LDAP) || !defined(CYRUS_PWCHECK_SOCKET) || \
2467 !defined(SUPPORT_CRYPTEQ) || !defined(CYRUS_SASLAUTHD_SOCKET)
2468 COND_FAILED_NOT_COMPILED
:
2469 expand_string_message
= string_sprintf("support for \"%s\" not compiled",
2478 /*************************************************
2479 * Save numerical variables *
2480 *************************************************/
2482 /* This function is called from items such as "if" that want to preserve and
2483 restore the numbered variables.
2486 save_expand_string points to an array of pointers to set
2487 save_expand_nlength points to an array of ints for the lengths
2489 Returns: the value of expand max to save
2493 save_expand_strings(uschar
**save_expand_nstring
, int *save_expand_nlength
)
2496 for (i
= 0; i
<= expand_nmax
; i
++)
2498 save_expand_nstring
[i
] = expand_nstring
[i
];
2499 save_expand_nlength
[i
] = expand_nlength
[i
];
2506 /*************************************************
2507 * Restore numerical variables *
2508 *************************************************/
2510 /* This function restored saved values of numerical strings.
2513 save_expand_nmax the number of strings to restore
2514 save_expand_string points to an array of pointers
2515 save_expand_nlength points to an array of ints
2521 restore_expand_strings(int save_expand_nmax
, uschar
**save_expand_nstring
,
2522 int *save_expand_nlength
)
2525 expand_nmax
= save_expand_nmax
;
2526 for (i
= 0; i
<= expand_nmax
; i
++)
2528 expand_nstring
[i
] = save_expand_nstring
[i
];
2529 expand_nlength
[i
] = save_expand_nlength
[i
];
2537 /*************************************************
2538 * Handle yes/no substrings *
2539 *************************************************/
2541 /* This function is used by ${if}, ${lookup} and ${extract} to handle the
2542 alternative substrings that depend on whether or not the condition was true,
2543 or the lookup or extraction succeeded. The substrings always have to be
2544 expanded, to check their syntax, but "skipping" is set when the result is not
2545 needed - this avoids unnecessary nested lookups.
2548 skipping TRUE if we were skipping when this item was reached
2549 yes TRUE if the first string is to be used, else use the second
2550 save_lookup a value to put back into lookup_value before the 2nd expansion
2551 sptr points to the input string pointer
2552 yieldptr points to the output string pointer
2553 sizeptr points to the output string size
2554 ptrptr points to the output string pointer
2555 type "lookup" or "if" or "extract" or "run", for error message
2557 Returns: 0 OK; lookup_value has been reset to save_lookup
2559 2 expansion failed because of bracketing error
2563 process_yesno(BOOL skipping
, BOOL yes
, uschar
*save_lookup
, uschar
**sptr
,
2564 uschar
**yieldptr
, int *sizeptr
, int *ptrptr
, uschar
*type
)
2567 uschar
*s
= *sptr
; /* Local value */
2568 uschar
*sub1
, *sub2
;
2570 /* If there are no following strings, we substitute the contents of $value for
2571 lookups and for extractions in the success case. For the ${if item, the string
2572 "true" is substituted. In the fail case, nothing is substituted for all three
2575 while (isspace(*s
)) s
++;
2580 if (yes
) *yieldptr
= string_cat(*yieldptr
, sizeptr
, ptrptr
, US
"true", 4);
2584 if (yes
&& lookup_value
!= NULL
)
2585 *yieldptr
= string_cat(*yieldptr
, sizeptr
, ptrptr
, lookup_value
,
2586 Ustrlen(lookup_value
));
2587 lookup_value
= save_lookup
;
2593 /* The first following string must be braced. */
2595 if (*s
++ != '{') goto FAILED_CURLY
;
2597 /* Expand the first substring. Forced failures are noticed only if we actually
2598 want this string. Set skipping in the call in the fail case (this will always
2599 be the case if we were already skipping). */
2601 sub1
= expand_string_internal(s
, TRUE
, &s
, !yes
);
2602 if (sub1
== NULL
&& (yes
|| !expand_string_forcedfail
)) goto FAILED
;
2603 expand_string_forcedfail
= FALSE
;
2604 if (*s
++ != '}') goto FAILED_CURLY
;
2606 /* If we want the first string, add it to the output */
2609 *yieldptr
= string_cat(*yieldptr
, sizeptr
, ptrptr
, sub1
, Ustrlen(sub1
));
2611 /* If this is called from a lookup or an extract, we want to restore $value to
2612 what it was at the start of the item, so that it has this value during the
2613 second string expansion. For the call from "if" or "run" to this function,
2614 save_lookup is set to lookup_value, so that this statement does nothing. */
2616 lookup_value
= save_lookup
;
2618 /* There now follows either another substring, or "fail", or nothing. This
2619 time, forced failures are noticed only if we want the second string. We must
2620 set skipping in the nested call if we don't want this string, or if we were
2621 already skipping. */
2623 while (isspace(*s
)) s
++;
2626 sub2
= expand_string_internal(s
+1, TRUE
, &s
, yes
|| skipping
);
2627 if (sub2
== NULL
&& (!yes
|| !expand_string_forcedfail
)) goto FAILED
;
2628 expand_string_forcedfail
= FALSE
;
2629 if (*s
++ != '}') goto FAILED_CURLY
;
2631 /* If we want the second string, add it to the output */
2634 *yieldptr
= string_cat(*yieldptr
, sizeptr
, ptrptr
, sub2
, Ustrlen(sub2
));
2637 /* If there is no second string, but the word "fail" is present when the use of
2638 the second string is wanted, set a flag indicating it was a forced failure
2639 rather than a syntactic error. Swallow the terminating } in case this is nested
2640 inside another lookup or if or extract. */
2645 s
= read_name(name
, sizeof(name
), s
, US
"_");
2646 if (Ustrcmp(name
, "fail") == 0)
2648 if (!yes
&& !skipping
)
2650 while (isspace(*s
)) s
++;
2651 if (*s
++ != '}') goto FAILED_CURLY
;
2652 expand_string_message
=
2653 string_sprintf("\"%s\" failed and \"fail\" requested", type
);
2654 expand_string_forcedfail
= TRUE
;
2660 expand_string_message
=
2661 string_sprintf("syntax error in \"%s\" item - \"fail\" expected", type
);
2666 /* All we have to do now is to check on the final closing brace. */
2668 while (isspace(*s
)) s
++;
2669 if (*s
++ == '}') goto RETURN
;
2671 /* Get here if there is a bracketing failure */
2676 /* Get here for other failures */
2681 /* Update the input pointer value before returning */
2691 /*************************************************
2692 * Handle MD5 or SHA-1 computation for HMAC *
2693 *************************************************/
2695 /* These are some wrapping functions that enable the HMAC code to be a bit
2696 cleaner. A good compiler will spot the tail recursion.
2699 type HMAC_MD5 or HMAC_SHA1
2700 remaining are as for the cryptographic hash functions
2706 chash_start(int type
, void *base
)
2708 if (type
== HMAC_MD5
)
2709 md5_start((md5
*)base
);
2711 sha1_start((sha1
*)base
);
2715 chash_mid(int type
, void *base
, uschar
*string
)
2717 if (type
== HMAC_MD5
)
2718 md5_mid((md5
*)base
, string
);
2720 sha1_mid((sha1
*)base
, string
);
2724 chash_end(int type
, void *base
, uschar
*string
, int length
, uschar
*digest
)
2726 if (type
== HMAC_MD5
)
2727 md5_end((md5
*)base
, string
, length
, digest
);
2729 sha1_end((sha1
*)base
, string
, length
, digest
);
2736 /********************************************************
2737 * prvs: Get last three digits of days since Jan 1, 1970 *
2738 ********************************************************/
2740 /* This is needed to implement the "prvs" BATV reverse
2743 Argument: integer "days" offset to add or substract to
2744 or from the current number of days.
2746 Returns: pointer to string containing the last three
2747 digits of the number of days since Jan 1, 1970,
2748 modified by the offset argument, NULL if there
2749 was an error in the conversion.
2754 prvs_daystamp(int day_offset
)
2756 uschar
*days
= store_get(32); /* Need at least 24 for cases */
2757 (void)string_format(days
, 32, TIME_T_FMT
, /* where TIME_T_FMT is %lld */
2758 (time(NULL
) + day_offset
*86400)/86400);
2759 return (Ustrlen(days
) >= 3) ? &days
[Ustrlen(days
)-3] : US
"100";
2764 /********************************************************
2765 * prvs: perform HMAC-SHA1 computation of prvs bits *
2766 ********************************************************/
2768 /* This is needed to implement the "prvs" BATV reverse
2772 address RFC2821 Address to use
2773 key The key to use (must be less than 64 characters
2775 key_num Single-digit key number to use. Defaults to
2778 Returns: pointer to string containing the first three
2779 bytes of the final hash in hex format, NULL if
2780 there was an error in the process.
2784 prvs_hmac_sha1(uschar
*address
, uschar
*key
, uschar
*key_num
, uschar
*daystamp
)
2786 uschar
*hash_source
, *p
;
2787 int size
= 0,offset
= 0,i
;
2789 void *use_base
= &sha1_base
;
2790 uschar innerhash
[20];
2791 uschar finalhash
[20];
2792 uschar innerkey
[64];
2793 uschar outerkey
[64];
2794 uschar
*finalhash_hex
= store_get(40);
2796 if (key_num
== NULL
)
2799 if (Ustrlen(key
) > 64)
2802 hash_source
= string_cat(NULL
,&size
,&offset
,key_num
,1);
2803 string_cat(hash_source
,&size
,&offset
,daystamp
,3);
2804 string_cat(hash_source
,&size
,&offset
,address
,Ustrlen(address
));
2805 hash_source
[offset
] = '\0';
2807 DEBUG(D_expand
) debug_printf("prvs: hash source is '%s'\n", hash_source
);
2809 memset(innerkey
, 0x36, 64);
2810 memset(outerkey
, 0x5c, 64);
2812 for (i
= 0; i
< Ustrlen(key
); i
++)
2814 innerkey
[i
] ^= key
[i
];
2815 outerkey
[i
] ^= key
[i
];
2818 chash_start(HMAC_SHA1
, use_base
);
2819 chash_mid(HMAC_SHA1
, use_base
, innerkey
);
2820 chash_end(HMAC_SHA1
, use_base
, hash_source
, offset
, innerhash
);
2822 chash_start(HMAC_SHA1
, use_base
);
2823 chash_mid(HMAC_SHA1
, use_base
, outerkey
);
2824 chash_end(HMAC_SHA1
, use_base
, innerhash
, 20, finalhash
);
2827 for (i
= 0; i
< 3; i
++)
2829 *p
++ = hex_digits
[(finalhash
[i
] & 0xf0) >> 4];
2830 *p
++ = hex_digits
[finalhash
[i
] & 0x0f];
2834 return finalhash_hex
;
2840 /*************************************************
2841 * Join a file onto the output string *
2842 *************************************************/
2844 /* This is used for readfile and after a run expansion. It joins the contents
2845 of a file onto the output string, globally replacing newlines with a given
2846 string (optionally). The file is closed at the end.
2850 yield pointer to the expandable string
2851 sizep pointer to the current size
2852 ptrp pointer to the current position
2853 eol newline replacement string, or NULL
2855 Returns: new value of string pointer
2859 cat_file(FILE *f
, uschar
*yield
, int *sizep
, int *ptrp
, uschar
*eol
)
2862 uschar buffer
[1024];
2864 eollen
= (eol
== NULL
)? 0 : Ustrlen(eol
);
2866 while (Ufgets(buffer
, sizeof(buffer
), f
) != NULL
)
2868 int len
= Ustrlen(buffer
);
2869 if (eol
!= NULL
&& buffer
[len
-1] == '\n') len
--;
2870 yield
= string_cat(yield
, sizep
, ptrp
, buffer
, len
);
2871 if (buffer
[len
] != 0)
2872 yield
= string_cat(yield
, sizep
, ptrp
, eol
, eollen
);
2875 if (yield
!= NULL
) yield
[*ptrp
] = 0;
2883 /*************************************************
2884 * Evaluate numeric expression *
2885 *************************************************/
2887 /* This is a set of mutually recursive functions that evaluate an arithmetic
2888 expression involving + - * / % & | ^ ~ << >> and parentheses. The only one of
2889 these functions that is called from elsewhere is eval_expr, whose interface is:
2892 sptr pointer to the pointer to the string - gets updated
2893 decimal TRUE if numbers are to be assumed decimal
2894 error pointer to where to put an error message - must be NULL on input
2895 endket TRUE if ')' must terminate - FALSE for external call
2897 Returns: on success: the value of the expression, with *error still NULL
2898 on failure: an undefined value, with *error = a message
2901 static int eval_op_or(uschar
**, BOOL
, uschar
**);
2905 eval_expr(uschar
**sptr
, BOOL decimal
, uschar
**error
, BOOL endket
)
2908 int x
= eval_op_or(&s
, decimal
, error
);
2914 *error
= US
"expecting closing parenthesis";
2916 while (isspace(*(++s
)));
2918 else if (*s
!= 0) *error
= US
"expecting operator";
2926 eval_number(uschar
**sptr
, BOOL decimal
, uschar
**error
)
2931 while (isspace(*s
)) s
++;
2936 (void)sscanf(CS s
, (decimal
? "%d%n" : "%i%n"), &n
, &count
);
2938 if (tolower(*s
) == 'k') { n
*= 1024; s
++; }
2939 else if (tolower(*s
) == 'm') { n
*= 1024*1024; s
++; }
2940 while (isspace (*s
)) s
++;
2945 n
= eval_expr(&s
, decimal
, error
, 1);
2949 *error
= US
"expecting number or opening parenthesis";
2957 static int eval_op_unary(uschar
**sptr
, BOOL decimal
, uschar
**error
)
2961 while (isspace(*s
)) s
++;
2962 if (*s
== '+' || *s
== '-' || *s
== '~')
2965 x
= eval_op_unary(&s
, decimal
, error
);
2966 if (op
== '-') x
= -x
;
2967 else if (op
== '~') x
= ~x
;
2971 x
= eval_number(&s
, decimal
, error
);
2978 static int eval_op_mult(uschar
**sptr
, BOOL decimal
, uschar
**error
)
2981 int x
= eval_op_unary(&s
, decimal
, error
);
2984 while (*s
== '*' || *s
== '/' || *s
== '%')
2987 int y
= eval_op_unary(&s
, decimal
, error
);
2988 if (*error
!= NULL
) break;
2989 if (op
== '*') x
*= y
;
2990 else if (op
== '/') x
/= y
;
2999 static int eval_op_sum(uschar
**sptr
, BOOL decimal
, uschar
**error
)
3002 int x
= eval_op_mult(&s
, decimal
, error
);
3005 while (*s
== '+' || *s
== '-')
3008 int y
= eval_op_mult(&s
, decimal
, error
);
3009 if (*error
!= NULL
) break;
3010 if (op
== '+') x
+= y
; else x
-= y
;
3018 static int eval_op_shift(uschar
**sptr
, BOOL decimal
, uschar
**error
)
3021 int x
= eval_op_sum(&s
, decimal
, error
);
3024 while ((*s
== '<' || *s
== '>') && s
[1] == s
[0])
3029 y
= eval_op_sum(&s
, decimal
, error
);
3030 if (*error
!= NULL
) break;
3031 if (op
== '<') x
<<= y
; else x
>>= y
;
3039 static int eval_op_and(uschar
**sptr
, BOOL decimal
, uschar
**error
)
3042 int x
= eval_op_shift(&s
, decimal
, error
);
3049 y
= eval_op_shift(&s
, decimal
, error
);
3050 if (*error
!= NULL
) break;
3059 static int eval_op_xor(uschar
**sptr
, BOOL decimal
, uschar
**error
)
3062 int x
= eval_op_and(&s
, decimal
, error
);
3069 y
= eval_op_and(&s
, decimal
, error
);
3070 if (*error
!= NULL
) break;
3079 static int eval_op_or(uschar
**sptr
, BOOL decimal
, uschar
**error
)
3082 int x
= eval_op_xor(&s
, decimal
, error
);
3089 y
= eval_op_xor(&s
, decimal
, error
);
3090 if (*error
!= NULL
) break;
3100 /*************************************************
3102 *************************************************/
3104 /* Returns either an unchanged string, or the expanded string in stacking pool
3105 store. Interpreted sequences are:
3107 \... normal escaping rules
3108 $name substitutes the variable
3110 ${op:string} operates on the expanded string value
3111 ${item{arg1}{arg2}...} expands the args and then does the business
3112 some literal args are not enclosed in {}
3114 There are now far too many operators and item types to make it worth listing
3115 them here in detail any more.
3117 We use an internal routine recursively to handle embedded substrings. The
3118 external function follows. The yield is NULL if the expansion failed, and there
3119 are two cases: if something collapsed syntactically, or if "fail" was given
3120 as the action on a lookup failure. These can be distinguised by looking at the
3121 variable expand_string_forcedfail, which is TRUE in the latter case.
3123 The skipping flag is set true when expanding a substring that isn't actually
3124 going to be used (after "if" or "lookup") and it prevents lookups from
3125 happening lower down.
3127 Store usage: At start, a store block of the length of the input plus 64
3128 is obtained. This is expanded as necessary by string_cat(), which might have to
3129 get a new block, or might be able to expand the original. At the end of the
3130 function we can release any store above that portion of the yield block that
3131 was actually used. In many cases this will be optimal.
3133 However: if the first item in the expansion is a variable name or header name,
3134 we reset the store before processing it; if the result is in fresh store, we
3135 use that without copying. This is helpful for expanding strings like
3136 $message_headers which can get very long.
3139 string the string to be expanded
3140 ket_ends true if expansion is to stop at }
3141 left if not NULL, a pointer to the first character after the
3142 expansion is placed here (typically used with ket_ends)
3143 skipping TRUE for recursive calls when the value isn't actually going
3144 to be used (to allow for optimisation)
3146 Returns: NULL if expansion fails:
3147 expand_string_forcedfail is set TRUE if failure was forced
3148 expand_string_message contains a textual error message
3149 a pointer to the expanded string on success
3153 expand_string_internal(uschar
*string
, BOOL ket_ends
, uschar
**left
,
3157 int size
= Ustrlen(string
)+ 64;
3159 uschar
*yield
= store_get(size
);
3161 uschar
*save_expand_nstring
[EXPAND_MAXN
+1];
3162 int save_expand_nlength
[EXPAND_MAXN
+1];
3164 expand_string_forcedfail
= FALSE
;
3165 expand_string_message
= US
"";
3172 /* \ escapes the next character, which must exist, or else
3173 the expansion fails. There's a special escape, \N, which causes
3174 copying of the subject verbatim up to the next \N. Otherwise,
3175 the escapes are the standard set. */
3181 expand_string_message
= US
"\\ at end of string";
3188 for (s
= t
; *s
!= 0; s
++) if (*s
== '\\' && s
[1] == 'N') break;
3189 yield
= string_cat(yield
, &size
, &ptr
, t
, s
- t
);
3190 if (*s
!= 0) s
+= 2;
3196 ch
[0] = string_interpret_escape(&s
);
3198 yield
= string_cat(yield
, &size
, &ptr
, ch
, 1);
3204 /* Anything other than $ is just copied verbatim, unless we are
3205 looking for a terminating } character. */
3207 if (ket_ends
&& *s
== '}') break;
3211 yield
= string_cat(yield
, &size
, &ptr
, s
++, 1);
3215 /* No { after the $ - must be a plain name or a number for string
3216 match variable. There has to be a fudge for variables that are the
3217 names of header fields preceded by "$header_" because header field
3218 names can contain any printing characters except space and colon.
3219 For those that don't like typing this much, "$h_" is a synonym for
3220 "$header_". A non-existent header yields a NULL value; nothing is
3223 if (isalpha((*(++s
))))
3228 s
= read_name(name
, sizeof(name
), s
, US
"_");
3230 /* If this is the first thing to be expanded, release the pre-allocated
3233 if (ptr
== 0 && yield
!= NULL
)
3242 if (Ustrncmp(name
, "h_", 2) == 0 ||
3243 Ustrncmp(name
, "rh_", 3) == 0 ||
3244 Ustrncmp(name
, "bh_", 3) == 0 ||
3245 Ustrncmp(name
, "header_", 7) == 0 ||
3246 Ustrncmp(name
, "rheader_", 8) == 0 ||
3247 Ustrncmp(name
, "bheader_", 8) == 0)
3249 BOOL want_raw
= (name
[0] == 'r')? TRUE
: FALSE
;
3250 uschar
*charset
= (name
[0] == 'b')? NULL
: headers_charset
;
3251 s
= read_header_name(name
, sizeof(name
), s
);
3252 value
= find_header(name
, FALSE
, &newsize
, want_raw
, charset
);
3254 /* If we didn't find the header, and the header contains a closing brace
3255 character, this may be a user error where the terminating colon
3256 has been omitted. Set a flag to adjust the error message in this case.
3257 But there is no error here - nothing gets inserted. */
3261 if (Ustrchr(name
, '}') != NULL
) malformed_header
= TRUE
;
3270 value
= find_variable(name
, FALSE
, skipping
, &newsize
);
3273 expand_string_message
=
3274 string_sprintf("unknown variable name \"%s\"", name
);
3275 check_variable_error_message(name
);
3280 /* If the data is known to be in a new buffer, newsize will be set to the
3281 size of that buffer. If this is the first thing in an expansion string,
3282 yield will be NULL; just point it at the new store instead of copying. Many
3283 expansion strings contain just one reference, so this is a useful
3284 optimization, especially for humungous headers. */
3286 len
= Ustrlen(value
);
3287 if (yield
== NULL
&& newsize
!= 0)
3293 else yield
= string_cat(yield
, &size
, &ptr
, value
, len
);
3301 s
= read_number(&n
, s
);
3302 if (n
>= 0 && n
<= expand_nmax
)
3303 yield
= string_cat(yield
, &size
, &ptr
, expand_nstring
[n
],
3308 /* Otherwise, if there's no '{' after $ it's an error. */
3312 expand_string_message
= US
"$ not followed by letter, digit, or {";
3316 /* After { there can be various things, but they all start with
3317 an initial word, except for a number for a string match variable. */
3319 if (isdigit((*(++s
))))
3322 s
= read_number(&n
, s
);
3325 expand_string_message
= US
"} expected after number";
3328 if (n
>= 0 && n
<= expand_nmax
)
3329 yield
= string_cat(yield
, &size
, &ptr
, expand_nstring
[n
],
3336 expand_string_message
= US
"letter or digit expected after ${";
3340 /* Allow "-" in names to cater for substrings with negative
3341 arguments. Since we are checking for known names after { this is
3344 s
= read_name(name
, sizeof(name
), s
, US
"_-");
3345 item_type
= chop_match(name
, item_table
, sizeof(item_table
)/sizeof(uschar
*));
3349 /* Handle conditionals - preserve the values of the numerical expansion
3350 variables in case they get changed by a regular expression match in the
3351 condition. If not, they retain their external settings. At the end
3352 of this "if" section, they get restored to their previous values. */
3358 int save_expand_nmax
=
3359 save_expand_strings(save_expand_nstring
, save_expand_nlength
);
3361 while (isspace(*s
)) s
++;
3362 next_s
= eval_condition(s
, skipping
? NULL
: &cond
);
3363 if (next_s
== NULL
) goto EXPAND_FAILED
; /* message already set */
3366 debug_printf("condition: %.*s\n result: %s\n", (int)(next_s
- s
), s
,
3367 cond
? "true" : "false");
3371 /* The handling of "yes" and "no" result strings is now in a separate
3372 function that is also used by ${lookup} and ${extract} and ${run}. */
3374 switch(process_yesno(
3375 skipping
, /* were previously skipping */
3376 cond
, /* success/failure indicator */
3377 lookup_value
, /* value to reset for string2 */
3378 &s
, /* input pointer */
3379 &yield
, /* output pointer */
3380 &size
, /* output size */
3381 &ptr
, /* output current point */
3382 US
"if")) /* condition type */
3384 case 1: goto EXPAND_FAILED
; /* when all is well, the */
3385 case 2: goto EXPAND_FAILED_CURLY
; /* returned value is 0 */
3388 /* Restore external setting of expansion variables for continuation
3391 restore_expand_strings(save_expand_nmax
, save_expand_nstring
,
3392 save_expand_nlength
);
3396 /* Handle database lookups unless locked out. If "skipping" is TRUE, we are
3397 expanding an internal string that isn't actually going to be used. All we
3398 need to do is check the syntax, so don't do a lookup at all. Preserve the
3399 values of the numerical expansion variables in case they get changed by a
3400 partial lookup. If not, they retain their external settings. At the end
3401 of this "lookup" section, they get restored to their previous values. */
3405 int stype
, partial
, affixlen
, starflags
;
3406 int expand_setup
= 0;
3408 uschar
*key
, *filename
, *affix
;
3409 uschar
*save_lookup_value
= lookup_value
;
3410 int save_expand_nmax
=
3411 save_expand_strings(save_expand_nstring
, save_expand_nlength
);
3413 if ((expand_forbid
& RDO_LOOKUP
) != 0)
3415 expand_string_message
= US
"lookup expansions are not permitted";
3419 /* Get the key we are to look up for single-key+file style lookups.
3420 Otherwise set the key NULL pro-tem. */
3422 while (isspace(*s
)) s
++;
3425 key
= expand_string_internal(s
+1, TRUE
, &s
, skipping
);
3426 if (key
== NULL
) goto EXPAND_FAILED
;
3427 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
3428 while (isspace(*s
)) s
++;
3432 /* Find out the type of database */
3436 expand_string_message
= US
"missing lookup type";
3440 /* The type is a string that may contain special characters of various
3441 kinds. Allow everything except space or { to appear; the actual content
3442 is checked by search_findtype_partial. */
3444 while (*s
!= 0 && *s
!= '{' && !isspace(*s
))
3446 if (nameptr
< sizeof(name
) - 1) name
[nameptr
++] = *s
;
3450 while (isspace(*s
)) s
++;
3452 /* Now check for the individual search type and any partial or default
3453 options. Only those types that are actually in the binary are valid. */
3455 stype
= search_findtype_partial(name
, &partial
, &affix
, &affixlen
,
3459 expand_string_message
= search_error_message
;
3463 /* Check that a key was provided for those lookup types that need it,
3464 and was not supplied for those that use the query style. */
3466 if (!mac_islookup(stype
, lookup_querystyle
|lookup_absfilequery
))
3470 expand_string_message
= string_sprintf("missing {key} for single-"
3471 "key \"%s\" lookup", name
);
3479 expand_string_message
= string_sprintf("a single key was given for "
3480 "lookup type \"%s\", which is not a single-key lookup type", name
);
3485 /* Get the next string in brackets and expand it. It is the file name for
3486 single-key+file lookups, and the whole query otherwise. In the case of
3487 queries that also require a file name (e.g. sqlite), the file name comes
3490 if (*s
!= '{') goto EXPAND_FAILED_CURLY
;
3491 filename
= expand_string_internal(s
+1, TRUE
, &s
, skipping
);
3492 if (filename
== NULL
) goto EXPAND_FAILED
;
3493 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
3494 while (isspace(*s
)) s
++;
3496 /* If this isn't a single-key+file lookup, re-arrange the variables
3497 to be appropriate for the search_ functions. For query-style lookups,
3498 there is just a "key", and no file name. For the special query-style +
3499 file types, the query (i.e. "key") starts with a file name. */
3503 while (isspace(*filename
)) filename
++;
3506 if (mac_islookup(stype
, lookup_querystyle
))
3512 if (*filename
!= '/')
3514 expand_string_message
= string_sprintf(
3515 "absolute file name expected for \"%s\" lookup", name
);
3518 while (*key
!= 0 && !isspace(*key
)) key
++;
3519 if (*key
!= 0) *key
++ = 0;
3523 /* If skipping, don't do the next bit - just lookup_value == NULL, as if
3524 the entry was not found. Note that there is no search_close() function.
3525 Files are left open in case of re-use. At suitable places in higher logic,
3526 search_tidyup() is called to tidy all open files. This can save opening
3527 the same file several times. However, files may also get closed when
3528 others are opened, if too many are open at once. The rule is that a
3529 handle should not be used after a second search_open().
3531 Request that a partial search sets up $1 and maybe $2 by passing
3532 expand_setup containing zero. If its value changes, reset expand_nmax,
3533 since new variables will have been set. Note that at the end of this
3534 "lookup" section, the old numeric variables are restored. */
3537 lookup_value
= NULL
;
3540 void *handle
= search_open(filename
, stype
, 0, NULL
, NULL
);
3543 expand_string_message
= search_error_message
;
3546 lookup_value
= search_find(handle
, filename
, key
, partial
, affix
,
3547 affixlen
, starflags
, &expand_setup
);
3548 if (search_find_defer
)
3550 expand_string_message
=
3551 string_sprintf("lookup of \"%s\" gave DEFER: %s", key
,
3552 search_error_message
);
3555 if (expand_setup
> 0) expand_nmax
= expand_setup
;
3558 /* The handling of "yes" and "no" result strings is now in a separate
3559 function that is also used by ${if} and ${extract}. */
3561 switch(process_yesno(
3562 skipping
, /* were previously skipping */
3563 lookup_value
!= NULL
, /* success/failure indicator */
3564 save_lookup_value
, /* value to reset for string2 */
3565 &s
, /* input pointer */
3566 &yield
, /* output pointer */
3567 &size
, /* output size */
3568 &ptr
, /* output current point */
3569 US
"lookup")) /* condition type */
3571 case 1: goto EXPAND_FAILED
; /* when all is well, the */
3572 case 2: goto EXPAND_FAILED_CURLY
; /* returned value is 0 */
3575 /* Restore external setting of expansion variables for carrying on
3576 at this level, and continue. */
3578 restore_expand_strings(save_expand_nmax
, save_expand_nstring
,
3579 save_expand_nlength
);
3583 /* If Perl support is configured, handle calling embedded perl subroutines,
3584 unless locked out at this time. Syntax is ${perl{sub}} or ${perl{sub}{arg}}
3585 or ${perl{sub}{arg1}{arg2}} or up to a maximum of EXIM_PERL_MAX_ARGS
3586 arguments (defined below). */
3588 #define EXIM_PERL_MAX_ARGS 8
3592 expand_string_message
= US
"\"${perl\" encountered, but this facility "
3593 "is not included in this binary";
3596 #else /* EXIM_PERL */
3598 uschar
*sub_arg
[EXIM_PERL_MAX_ARGS
+ 2];
3601 if ((expand_forbid
& RDO_PERL
) != 0)
3603 expand_string_message
= US
"Perl calls are not permitted";
3607 switch(read_subs(sub_arg
, EXIM_PERL_MAX_ARGS
+ 1, 1, &s
, skipping
, TRUE
,
3610 case 1: goto EXPAND_FAILED_CURLY
;
3612 case 3: goto EXPAND_FAILED
;
3615 /* If skipping, we don't actually do anything */
3617 if (skipping
) continue;
3619 /* Start the interpreter if necessary */
3621 if (!opt_perl_started
)
3624 if (opt_perl_startup
== NULL
)
3626 expand_string_message
= US
"A setting of perl_startup is needed when "
3627 "using the Perl interpreter";
3630 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
3631 initerror
= init_perl(opt_perl_startup
);
3632 if (initerror
!= NULL
)
3634 expand_string_message
=
3635 string_sprintf("error in perl_startup code: %s\n", initerror
);
3638 opt_perl_started
= TRUE
;
3641 /* Call the function */
3643 sub_arg
[EXIM_PERL_MAX_ARGS
+ 1] = NULL
;
3644 new_yield
= call_perl_cat(yield
, &size
, &ptr
, &expand_string_message
,
3645 sub_arg
[0], sub_arg
+ 1);
3647 /* NULL yield indicates failure; if the message pointer has been set to
3648 NULL, the yield was undef, indicating a forced failure. Otherwise the
3649 message will indicate some kind of Perl error. */
3651 if (new_yield
== NULL
)
3653 if (expand_string_message
== NULL
)
3655 expand_string_message
=
3656 string_sprintf("Perl subroutine \"%s\" returned undef to force "
3657 "failure", sub_arg
[0]);
3658 expand_string_forcedfail
= TRUE
;
3663 /* Yield succeeded. Ensure forcedfail is unset, just in case it got
3664 set during a callback from Perl. */
3666 expand_string_forcedfail
= FALSE
;
3670 #endif /* EXIM_PERL */
3672 /* Transform email address to "prvs" scheme to use
3673 as BATV-signed return path */
3680 switch(read_subs(sub_arg
, 3, 2, &s
, skipping
, TRUE
, US
"prvs"))
3682 case 1: goto EXPAND_FAILED_CURLY
;
3684 case 3: goto EXPAND_FAILED
;
3687 /* If skipping, we don't actually do anything */
3688 if (skipping
) continue;
3690 /* sub_arg[0] is the address */
3691 domain
= Ustrrchr(sub_arg
[0],'@');
3692 if ( (domain
== NULL
) || (domain
== sub_arg
[0]) || (Ustrlen(domain
) == 1) )
3694 expand_string_message
= US
"prvs first argument must be a qualified email address";
3698 /* Calculate the hash. The second argument must be a single-digit
3699 key number, or unset. */
3701 if (sub_arg
[2] != NULL
&&
3702 (!isdigit(sub_arg
[2][0]) || sub_arg
[2][1] != 0))
3704 expand_string_message
= US
"prvs second argument must be a single digit";
3708 p
= prvs_hmac_sha1(sub_arg
[0],sub_arg
[1],sub_arg
[2],prvs_daystamp(7));
3711 expand_string_message
= US
"prvs hmac-sha1 conversion failed";
3715 /* Now separate the domain from the local part */
3718 yield
= string_cat(yield
,&size
,&ptr
,US
"prvs=",5);
3719 string_cat(yield
,&size
,&ptr
,(sub_arg
[2] != NULL
) ? sub_arg
[2] : US
"0", 1);
3720 string_cat(yield
,&size
,&ptr
,prvs_daystamp(7),3);
3721 string_cat(yield
,&size
,&ptr
,p
,6);
3722 string_cat(yield
,&size
,&ptr
,US
"=",1);
3723 string_cat(yield
,&size
,&ptr
,sub_arg
[0],Ustrlen(sub_arg
[0]));
3724 string_cat(yield
,&size
,&ptr
,US
"@",1);
3725 string_cat(yield
,&size
,&ptr
,domain
,Ustrlen(domain
));
3730 /* Check a prvs-encoded address for validity */
3732 case EITEM_PRVSCHECK
:
3735 int mysize
= 0, myptr
= 0;
3739 /* TF: Ugliness: We want to expand parameter 1 first, then set
3740 up expansion variables that are used in the expansion of
3741 parameter 2. So we clone the string for the first
3742 expansion, where we only expand parameter 1.
3744 PH: Actually, that isn't necessary. The read_subs() function is
3745 designed to work this way for the ${if and ${lookup expansions. I've
3749 /* Reset expansion variables */
3750 prvscheck_result
= NULL
;
3751 prvscheck_address
= NULL
;
3752 prvscheck_keynum
= NULL
;
3754 switch(read_subs(sub_arg
, 1, 1, &s
, skipping
, FALSE
, US
"prvs"))
3756 case 1: goto EXPAND_FAILED_CURLY
;
3758 case 3: goto EXPAND_FAILED
;
3761 re
= regex_must_compile(US
"^prvs\\=([0-9])([0-9]{3})([A-F0-9]{6})\\=(.+)\\@(.+)$",
3764 if (regex_match_and_setup(re
,sub_arg
[0],0,-1))
3766 uschar
*local_part
= string_copyn(expand_nstring
[4],expand_nlength
[4]);
3767 uschar
*key_num
= string_copyn(expand_nstring
[1],expand_nlength
[1]);
3768 uschar
*daystamp
= string_copyn(expand_nstring
[2],expand_nlength
[2]);
3769 uschar
*hash
= string_copyn(expand_nstring
[3],expand_nlength
[3]);
3770 uschar
*domain
= string_copyn(expand_nstring
[5],expand_nlength
[5]);
3772 DEBUG(D_expand
) debug_printf("prvscheck localpart: %s\n", local_part
);
3773 DEBUG(D_expand
) debug_printf("prvscheck key number: %s\n", key_num
);
3774 DEBUG(D_expand
) debug_printf("prvscheck daystamp: %s\n", daystamp
);
3775 DEBUG(D_expand
) debug_printf("prvscheck hash: %s\n", hash
);
3776 DEBUG(D_expand
) debug_printf("prvscheck domain: %s\n", domain
);
3778 /* Set up expansion variables */
3779 prvscheck_address
= string_cat(NULL
, &mysize
, &myptr
, local_part
, Ustrlen(local_part
));
3780 string_cat(prvscheck_address
,&mysize
,&myptr
,US
"@",1);
3781 string_cat(prvscheck_address
,&mysize
,&myptr
,domain
,Ustrlen(domain
));
3782 prvscheck_address
[myptr
] = '\0';
3783 prvscheck_keynum
= string_copy(key_num
);
3785 /* Now expand the second argument */
3786 switch(read_subs(sub_arg
, 1, 1, &s
, skipping
, FALSE
, US
"prvs"))
3788 case 1: goto EXPAND_FAILED_CURLY
;
3790 case 3: goto EXPAND_FAILED
;
3793 /* Now we have the key and can check the address. */
3795 p
= prvs_hmac_sha1(prvscheck_address
, sub_arg
[0], prvscheck_keynum
,
3800 expand_string_message
= US
"hmac-sha1 conversion failed";
3804 DEBUG(D_expand
) debug_printf("prvscheck: received hash is %s\n", hash
);
3805 DEBUG(D_expand
) debug_printf("prvscheck: own hash is %s\n", p
);
3807 if (Ustrcmp(p
,hash
) == 0)
3809 /* Success, valid BATV address. Now check the expiry date. */
3810 uschar
*now
= prvs_daystamp(0);
3811 unsigned int inow
= 0,iexpire
= 1;
3813 (void)sscanf(CS now
,"%u",&inow
);
3814 (void)sscanf(CS daystamp
,"%u",&iexpire
);
3816 /* When "iexpire" is < 7, a "flip" has occured.
3817 Adjust "inow" accordingly. */
3818 if ( (iexpire
< 7) && (inow
>= 993) ) inow
= 0;
3822 prvscheck_result
= US
"1";
3823 DEBUG(D_expand
) debug_printf("prvscheck: success, $pvrs_result set to 1\n");
3827 prvscheck_result
= NULL
;
3828 DEBUG(D_expand
) debug_printf("prvscheck: signature expired, $pvrs_result unset\n");
3833 prvscheck_result
= NULL
;
3834 DEBUG(D_expand
) debug_printf("prvscheck: hash failure, $pvrs_result unset\n");
3837 /* Now expand the final argument. We leave this till now so that
3838 it can include $prvscheck_result. */
3840 switch(read_subs(sub_arg
, 1, 0, &s
, skipping
, TRUE
, US
"prvs"))
3842 case 1: goto EXPAND_FAILED_CURLY
;
3844 case 3: goto EXPAND_FAILED
;
3847 if (sub_arg
[0] == NULL
|| *sub_arg
[0] == '\0')
3848 yield
= string_cat(yield
,&size
,&ptr
,prvscheck_address
,Ustrlen(prvscheck_address
));
3850 yield
= string_cat(yield
,&size
,&ptr
,sub_arg
[0],Ustrlen(sub_arg
[0]));
3852 /* Reset the "internal" variables afterwards, because they are in
3853 dynamic store that will be reclaimed if the expansion succeeded. */
3855 prvscheck_address
= NULL
;
3856 prvscheck_keynum
= NULL
;
3860 /* Does not look like a prvs encoded address, return the empty string.
3861 We need to make sure all subs are expanded first, so as to skip over
3864 switch(read_subs(sub_arg
, 2, 1, &s
, skipping
, TRUE
, US
"prvs"))
3866 case 1: goto EXPAND_FAILED_CURLY
;
3868 case 3: goto EXPAND_FAILED
;
3875 /* Handle "readfile" to insert an entire file */
3877 case EITEM_READFILE
:
3882 if ((expand_forbid
& RDO_READFILE
) != 0)
3884 expand_string_message
= US
"file insertions are not permitted";
3888 switch(read_subs(sub_arg
, 2, 1, &s
, skipping
, TRUE
, US
"readfile"))
3890 case 1: goto EXPAND_FAILED_CURLY
;
3892 case 3: goto EXPAND_FAILED
;
3895 /* If skipping, we don't actually do anything */
3897 if (skipping
) continue;
3899 /* Open the file and read it */
3901 f
= Ufopen(sub_arg
[0], "rb");
3904 expand_string_message
= string_open_failed(errno
, "%s", sub_arg
[0]);
3908 yield
= cat_file(f
, yield
, &size
, &ptr
, sub_arg
[1]);
3913 /* Handle "readsocket" to insert data from a Unix domain socket */
3915 case EITEM_READSOCK
:
3921 struct sockaddr_un sockun
; /* don't call this "sun" ! */
3925 if ((expand_forbid
& RDO_READSOCK
) != 0)
3927 expand_string_message
= US
"socket insertions are not permitted";
3931 /* Read up to 4 arguments, but don't do the end of item check afterwards,
3932 because there may be a string for expansion on failure. */
3934 switch(read_subs(sub_arg
, 4, 2, &s
, skipping
, FALSE
, US
"readsocket"))
3936 case 1: goto EXPAND_FAILED_CURLY
;
3937 case 2: /* Won't occur: no end check */
3938 case 3: goto EXPAND_FAILED
;
3941 /* Sort out timeout, if given */
3943 if (sub_arg
[2] != NULL
)
3945 timeout
= readconf_readtime(sub_arg
[2], 0, FALSE
);
3948 expand_string_message
= string_sprintf("bad time value %s",
3953 else sub_arg
[3] = NULL
; /* No eol if no timeout */
3955 /* If skipping, we don't actually do anything. Otherwise, arrange to
3956 connect to either an IP or a Unix socket. */
3960 /* Handle an IP (internet) domain */
3962 if (Ustrncmp(sub_arg
[0], "inet:", 5) == 0)
3964 BOOL connected
= FALSE
;
3968 uschar
*server_name
= sub_arg
[0] + 5;
3969 uschar
*port_name
= Ustrrchr(server_name
, ':');
3971 /* Sort out the port */
3973 if (port_name
== NULL
)
3975 expand_string_message
=
3976 string_sprintf("missing port for readsocket %s", sub_arg
[0]);
3979 *port_name
++ = 0; /* Terminate server name */
3981 if (isdigit(*port_name
))
3984 port
= Ustrtol(port_name
, &end
, 0);
3985 if (end
!= port_name
+ Ustrlen(port_name
))
3987 expand_string_message
=
3988 string_sprintf("invalid port number %s", port_name
);
3994 struct servent
*service_info
= getservbyname(CS port_name
, "tcp");
3995 if (service_info
== NULL
)
3997 expand_string_message
= string_sprintf("unknown port \"%s\"",
4001 port
= ntohs(service_info
->s_port
);
4004 /* Sort out the server. */
4007 shost
.address
= NULL
;
4011 namelen
= Ustrlen(server_name
);
4013 /* Anything enclosed in [] must be an IP address. */
4015 if (server_name
[0] == '[' &&
4016 server_name
[namelen
- 1] == ']')
4018 server_name
[namelen
- 1] = 0;
4020 if (string_is_ip_address(server_name
, NULL
) == 0)
4022 expand_string_message
=
4023 string_sprintf("malformed IP address \"%s\"", server_name
);
4026 shost
.name
= shost
.address
= server_name
;
4029 /* Otherwise check for an unadorned IP address */
4031 else if (string_is_ip_address(server_name
, NULL
) != 0)
4032 shost
.name
= shost
.address
= server_name
;
4034 /* Otherwise lookup IP address(es) from the name */
4038 shost
.name
= server_name
;
4039 if (host_find_byname(&shost
, NULL
, HOST_FIND_QUALIFY_SINGLE
, NULL
,
4040 FALSE
) != HOST_FOUND
)
4042 expand_string_message
=
4043 string_sprintf("no IP address found for host %s", shost
.name
);
4048 /* Try to connect to the server - test each IP till one works */
4050 for (h
= &shost
; h
!= NULL
; h
= h
->next
)
4052 int af
= (Ustrchr(h
->address
, ':') != 0)? AF_INET6
: AF_INET
;
4053 if ((fd
= ip_socket(SOCK_STREAM
, af
)) == -1)
4055 expand_string_message
= string_sprintf("failed to create socket: "
4056 "%s", strerror(errno
));
4060 if (ip_connect(fd
, af
, h
->address
, port
, timeout
) == 0)
4069 expand_string_message
= string_sprintf("failed to connect to "
4070 "socket %s: couldn't connect to any host", sub_arg
[0],
4076 /* Handle a Unix domain socket */
4081 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) == -1)
4083 expand_string_message
= string_sprintf("failed to create socket: %s",
4088 sockun
.sun_family
= AF_UNIX
;
4089 sprintf(sockun
.sun_path
, "%.*s", (int)(sizeof(sockun
.sun_path
)-1),
4092 sigalrm_seen
= FALSE
;
4094 rc
= connect(fd
, (struct sockaddr
*)(&sockun
), sizeof(sockun
));
4098 expand_string_message
= US
"socket connect timed out";
4103 expand_string_message
= string_sprintf("failed to connect to socket "
4104 "%s: %s", sub_arg
[0], strerror(errno
));
4109 DEBUG(D_expand
) debug_printf("connected to socket %s\n", sub_arg
[0]);
4111 /* Write the request string, if not empty */
4113 if (sub_arg
[1][0] != 0)
4115 int len
= Ustrlen(sub_arg
[1]);
4116 DEBUG(D_expand
) debug_printf("writing \"%s\" to socket\n",
4118 if (write(fd
, sub_arg
[1], len
) != len
)
4120 expand_string_message
= string_sprintf("request write to socket "
4121 "failed: %s", strerror(errno
));
4126 /* Shut down the sending side of the socket. This helps some servers to
4127 recognise that it is their turn to do some work. Just in case some
4128 system doesn't have this function, make it conditional. */
4131 shutdown(fd
, SHUT_WR
);
4134 /* Now we need to read from the socket, under a timeout. The function
4135 that reads a file can be used. */
4137 f
= fdopen(fd
, "rb");
4138 sigalrm_seen
= FALSE
;
4140 yield
= cat_file(f
, yield
, &size
, &ptr
, sub_arg
[3]);
4144 /* After a timeout, we restore the pointer in the result, that is,
4145 make sure we add nothing from the socket. */
4150 expand_string_message
= US
"socket read timed out";
4155 /* The whole thing has worked (or we were skipping). If there is a
4156 failure string following, we need to skip it. */
4160 if (expand_string_internal(s
+1, TRUE
, &s
, TRUE
) == NULL
)
4162 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4163 while (isspace(*s
)) s
++;
4165 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4168 /* Come here on failure to create socket, connect socket, write to the
4169 socket, or timeout on reading. If another substring follows, expand and
4170 use it. Otherwise, those conditions give expand errors. */
4173 if (*s
!= '{') goto EXPAND_FAILED
;
4174 DEBUG(D_any
) debug_printf("%s\n", expand_string_message
);
4175 arg
= expand_string_internal(s
+1, TRUE
, &s
, FALSE
);
4176 if (arg
== NULL
) goto EXPAND_FAILED
;
4177 yield
= string_cat(yield
, &size
, &ptr
, arg
, Ustrlen(arg
));
4178 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4179 while (isspace(*s
)) s
++;
4180 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4184 /* Handle "run" to execute a program. */
4196 if ((expand_forbid
& RDO_RUN
) != 0)
4198 expand_string_message
= US
"running a command is not permitted";
4202 while (isspace(*s
)) s
++;
4203 if (*s
!= '{') goto EXPAND_FAILED_CURLY
;
4204 arg
= expand_string_internal(s
+1, TRUE
, &s
, skipping
);
4205 if (arg
== NULL
) goto EXPAND_FAILED
;
4206 while (isspace(*s
)) s
++;
4207 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4209 if (skipping
) /* Just pretend it worked when we're skipping */
4215 if (!transport_set_up_command(&argv
, /* anchor for arg list */
4216 arg
, /* raw command */
4217 FALSE
, /* don't expand the arguments */
4218 0, /* not relevant when... */
4219 NULL
, /* no transporting address */
4220 US
"${run} expansion", /* for error messages */
4221 &expand_string_message
)) /* where to put error message */
4226 /* Create the child process, making it a group leader. */
4228 pid
= child_open(argv
, NULL
, 0077, &fd_in
, &fd_out
, TRUE
);
4232 expand_string_message
=
4233 string_sprintf("couldn't create child process: %s", strerror(errno
));
4237 /* Nothing is written to the standard input. */
4241 /* Wait for the process to finish, applying the timeout, and inspect its
4242 return code for serious disasters. Simple non-zero returns are passed on.
4245 if ((runrc
= child_close(pid
, 60)) < 0)
4249 expand_string_message
= string_sprintf("command timed out");
4250 killpg(pid
, SIGKILL
); /* Kill the whole process group */
4253 else if (runrc
== -257)
4254 expand_string_message
= string_sprintf("wait() failed: %s",
4258 expand_string_message
= string_sprintf("command killed by signal %d",
4264 /* Read the pipe to get the command's output into $value (which is kept
4265 in lookup_value). */
4267 f
= fdopen(fd_out
, "rb");
4268 lookup_value
= NULL
;
4269 lookup_value
= cat_file(f
, lookup_value
, &lsize
, &lptr
, NULL
);
4273 /* Process the yes/no strings; $value may be useful in both cases */
4275 switch(process_yesno(
4276 skipping
, /* were previously skipping */
4277 runrc
== 0, /* success/failure indicator */
4278 lookup_value
, /* value to reset for string2 */
4279 &s
, /* input pointer */
4280 &yield
, /* output pointer */
4281 &size
, /* output size */
4282 &ptr
, /* output current point */
4283 US
"run")) /* condition type */
4285 case 1: goto EXPAND_FAILED
; /* when all is well, the */
4286 case 2: goto EXPAND_FAILED_CURLY
; /* returned value is 0 */
4292 /* Handle character translation for "tr" */
4300 switch(read_subs(sub
, 3, 3, &s
, skipping
, TRUE
, US
"tr"))
4302 case 1: goto EXPAND_FAILED_CURLY
;
4304 case 3: goto EXPAND_FAILED
;
4307 yield
= string_cat(yield
, &size
, &ptr
, sub
[0], Ustrlen(sub
[0]));
4308 o2m
= Ustrlen(sub
[2]) - 1;
4310 if (o2m
>= 0) for (; oldptr
< ptr
; oldptr
++)
4312 uschar
*m
= Ustrrchr(sub
[1], yield
[oldptr
]);
4316 yield
[oldptr
] = sub
[2][(o
< o2m
)? o
: o2m
];
4323 /* Handle "hash", "length", "nhash", and "substr" when they are given with
4324 expanded arguments. */
4334 int val
[2] = { 0, -1 };
4337 /* "length" takes only 2 arguments whereas the others take 2 or 3.
4338 Ensure that sub[2] is set in the ${length case. */
4341 switch(read_subs(sub
, (item_type
== EITEM_LENGTH
)? 2:3, 2, &s
, skipping
,
4344 case 1: goto EXPAND_FAILED_CURLY
;
4346 case 3: goto EXPAND_FAILED
;
4349 /* Juggle the arguments if there are only two of them: always move the
4350 string to the last position and make ${length{n}{str}} equivalent to
4351 ${substr{0}{n}{str}}. See the defaults for val[] above. */
4357 if (item_type
== EITEM_LENGTH
)
4364 for (i
= 0; i
< 2; i
++)
4366 if (sub
[i
] == NULL
) continue;
4367 val
[i
] = (int)Ustrtol(sub
[i
], &ret
, 10);
4368 if (*ret
!= 0 || (i
!= 0 && val
[i
] < 0))
4370 expand_string_message
= string_sprintf("\"%s\" is not a%s number "
4371 "(in \"%s\" expansion)", sub
[i
], (i
!= 0)? " positive" : "", name
);
4377 (item_type
== EITEM_HASH
)?
4378 compute_hash(sub
[2], val
[0], val
[1], &len
) :
4379 (item_type
== EITEM_NHASH
)?
4380 compute_nhash(sub
[2], val
[0], val
[1], &len
) :
4381 extract_substr(sub
[2], val
[0], val
[1], &len
);
4383 if (ret
== NULL
) goto EXPAND_FAILED
;
4384 yield
= string_cat(yield
, &size
, &ptr
, ret
, len
);
4388 /* Handle HMAC computation: ${hmac{<algorithm>}{<secret>}{<text>}}
4389 This code originally contributed by Steve Haslam. It currently supports
4390 the use of MD5 and SHA-1 hashes.
4392 We need some workspace that is large enough to handle all the supported
4393 hash types. Use macros to set the sizes rather than be too elaborate. */
4395 #define MAX_HASHLEN 20
4396 #define MAX_HASHBLOCKLEN 64
4405 int hashlen
; /* Number of octets for the hash algorithm's output */
4406 int hashblocklen
; /* Number of octets the hash algorithm processes */
4408 unsigned int keylen
;
4410 uschar keyhash
[MAX_HASHLEN
];
4411 uschar innerhash
[MAX_HASHLEN
];
4412 uschar finalhash
[MAX_HASHLEN
];
4413 uschar finalhash_hex
[2*MAX_HASHLEN
];
4414 uschar innerkey
[MAX_HASHBLOCKLEN
];
4415 uschar outerkey
[MAX_HASHBLOCKLEN
];
4417 switch (read_subs(sub
, 3, 3, &s
, skipping
, TRUE
, name
))
4419 case 1: goto EXPAND_FAILED_CURLY
;
4421 case 3: goto EXPAND_FAILED
;
4424 if (Ustrcmp(sub
[0], "md5") == 0)
4427 use_base
= &md5_base
;
4431 else if (Ustrcmp(sub
[0], "sha1") == 0)
4434 use_base
= &sha1_base
;
4440 expand_string_message
=
4441 string_sprintf("hmac algorithm \"%s\" is not recognised", sub
[0]);
4446 keylen
= Ustrlen(keyptr
);
4448 /* If the key is longer than the hash block length, then hash the key
4451 if (keylen
> hashblocklen
)
4453 chash_start(type
, use_base
);
4454 chash_end(type
, use_base
, keyptr
, keylen
, keyhash
);
4459 /* Now make the inner and outer key values */
4461 memset(innerkey
, 0x36, hashblocklen
);
4462 memset(outerkey
, 0x5c, hashblocklen
);
4464 for (i
= 0; i
< keylen
; i
++)
4466 innerkey
[i
] ^= keyptr
[i
];
4467 outerkey
[i
] ^= keyptr
[i
];
4470 /* Now do the hashes */
4472 chash_start(type
, use_base
);
4473 chash_mid(type
, use_base
, innerkey
);
4474 chash_end(type
, use_base
, sub
[2], Ustrlen(sub
[2]), innerhash
);
4476 chash_start(type
, use_base
);
4477 chash_mid(type
, use_base
, outerkey
);
4478 chash_end(type
, use_base
, innerhash
, hashlen
, finalhash
);
4480 /* Encode the final hash as a hex string */
4483 for (i
= 0; i
< hashlen
; i
++)
4485 *p
++ = hex_digits
[(finalhash
[i
] & 0xf0) >> 4];
4486 *p
++ = hex_digits
[finalhash
[i
] & 0x0f];
4489 DEBUG(D_any
) debug_printf("HMAC[%s](%.*s,%.*s)=%.*s\n", sub
[0],
4490 (int)keylen
, keyptr
, Ustrlen(sub
[2]), sub
[2], hashlen
*2, finalhash_hex
);
4492 yield
= string_cat(yield
, &size
, &ptr
, finalhash_hex
, hashlen
*2);
4497 /* Handle global substitution for "sg" - like Perl's s/xxx/yyy/g operator.
4498 We have to save the numerical variables and restore them afterwards. */
4503 int moffset
, moffsetextra
, slen
;
4506 const uschar
*rerror
;
4509 int save_expand_nmax
=
4510 save_expand_strings(save_expand_nstring
, save_expand_nlength
);
4512 switch(read_subs(sub
, 3, 3, &s
, skipping
, TRUE
, US
"sg"))
4514 case 1: goto EXPAND_FAILED_CURLY
;
4516 case 3: goto EXPAND_FAILED
;
4519 /* Compile the regular expression */
4521 re
= pcre_compile(CS sub
[1], PCRE_COPT
, (const char **)&rerror
, &roffset
,
4526 expand_string_message
= string_sprintf("regular expression error in "
4527 "\"%s\": %s at offset %d", sub
[1], rerror
, roffset
);
4531 /* Now run a loop to do the substitutions as often as necessary. It ends
4532 when there are no more matches. Take care over matches of the null string;
4533 do the same thing as Perl does. */
4536 slen
= Ustrlen(sub
[0]);
4537 moffset
= moffsetextra
= 0;
4542 int ovector
[3*(EXPAND_MAXN
+1)];
4543 int n
= pcre_exec(re
, NULL
, CS subject
, slen
, moffset
+ moffsetextra
,
4544 PCRE_EOPT
| emptyopt
, ovector
, sizeof(ovector
)/sizeof(int));
4548 /* No match - if we previously set PCRE_NOTEMPTY after a null match, this
4549 is not necessarily the end. We want to repeat the match from one
4550 character further along, but leaving the basic offset the same (for
4551 copying below). We can't be at the end of the string - that was checked
4552 before setting PCRE_NOTEMPTY. If PCRE_NOTEMPTY is not set, we are
4553 finished; copy the remaining string and end the loop. */
4563 yield
= string_cat(yield
, &size
, &ptr
, subject
+moffset
, slen
-moffset
);
4567 /* Match - set up for expanding the replacement. */
4569 if (n
== 0) n
= EXPAND_MAXN
+ 1;
4571 for (nn
= 0; nn
< n
*2; nn
+= 2)
4573 expand_nstring
[expand_nmax
] = subject
+ ovector
[nn
];
4574 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
4578 /* Copy the characters before the match, plus the expanded insertion. */
4580 yield
= string_cat(yield
, &size
, &ptr
, subject
+ moffset
,
4581 ovector
[0] - moffset
);
4582 insert
= expand_string(sub
[2]);
4583 if (insert
== NULL
) goto EXPAND_FAILED
;
4584 yield
= string_cat(yield
, &size
, &ptr
, insert
, Ustrlen(insert
));
4586 moffset
= ovector
[1];
4590 /* If we have matched an empty string, first check to see if we are at
4591 the end of the subject. If so, the loop is over. Otherwise, mimic
4592 what Perl's /g options does. This turns out to be rather cunning. First
4593 we set PCRE_NOTEMPTY and PCRE_ANCHORED and try the match a non-empty
4594 string at the same point. If this fails (picked up above) we advance to
4595 the next character. */
4597 if (ovector
[0] == ovector
[1])
4599 if (ovector
[0] == slen
) break;
4600 emptyopt
= PCRE_NOTEMPTY
| PCRE_ANCHORED
;
4604 /* All done - restore numerical variables. */
4606 restore_expand_strings(save_expand_nmax
, save_expand_nstring
,
4607 save_expand_nlength
);
4611 /* Handle keyed and numbered substring extraction. If the first argument
4612 consists entirely of digits, then a numerical extraction is assumed. */
4618 int field_number
= 1;
4619 BOOL field_number_set
= FALSE
;
4620 uschar
*save_lookup_value
= lookup_value
;
4622 int save_expand_nmax
=
4623 save_expand_strings(save_expand_nstring
, save_expand_nlength
);
4625 /* Read the arguments */
4627 for (i
= 0; i
< j
; i
++)
4629 while (isspace(*s
)) s
++;
4632 sub
[i
] = expand_string_internal(s
+1, TRUE
, &s
, skipping
);
4633 if (sub
[i
] == NULL
) goto EXPAND_FAILED
;
4634 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4636 /* After removal of leading and trailing white space, the first
4637 argument must not be empty; if it consists entirely of digits
4638 (optionally preceded by a minus sign), this is a numerical
4639 extraction, and we expect 3 arguments. */
4647 while (isspace(*p
)) p
++;
4651 while (len
> 0 && isspace(p
[len
-1])) len
--;
4656 expand_string_message
= US
"first argument of \"extract\" must "
4666 while (*p
!= 0 && isdigit(*p
)) x
= x
* 10 + *p
++ - '0';
4670 j
= 3; /* Need 3 args */
4671 field_number_set
= TRUE
;
4675 else goto EXPAND_FAILED_CURLY
;
4678 /* Extract either the numbered or the keyed substring into $value. If
4679 skipping, just pretend the extraction failed. */
4681 lookup_value
= skipping
? NULL
: field_number_set
?
4682 expand_gettokened(field_number
, sub
[1], sub
[2]) :
4683 expand_getkeyed(sub
[0], sub
[1]);
4685 /* If no string follows, $value gets substituted; otherwise there can
4686 be yes/no strings, as for lookup or if. */
4688 switch(process_yesno(
4689 skipping
, /* were previously skipping */
4690 lookup_value
!= NULL
, /* success/failure indicator */
4691 save_lookup_value
, /* value to reset for string2 */
4692 &s
, /* input pointer */
4693 &yield
, /* output pointer */
4694 &size
, /* output size */
4695 &ptr
, /* output current point */
4696 US
"extract")) /* condition type */
4698 case 1: goto EXPAND_FAILED
; /* when all is well, the */
4699 case 2: goto EXPAND_FAILED_CURLY
; /* returned value is 0 */
4702 /* All done - restore numerical variables. */
4704 restore_expand_strings(save_expand_nmax
, save_expand_nstring
,
4705 save_expand_nlength
);
4711 /* Handle list operations */
4719 uschar outsep
[2] = { '\0', '\0' };
4720 uschar
*list
, *expr
, *temp
;
4721 uschar
*save_iterate_item
= iterate_item
;
4722 uschar
*save_lookup_value
= lookup_value
;
4724 while (isspace(*s
)) s
++;
4725 if (*s
++ != '{') goto EXPAND_FAILED_CURLY
;
4727 list
= expand_string_internal(s
, TRUE
, &s
, skipping
);
4728 if (list
== NULL
) goto EXPAND_FAILED
;
4729 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4731 if (item_type
== EITEM_REDUCE
)
4733 while (isspace(*s
)) s
++;
4734 if (*s
++ != '{') goto EXPAND_FAILED_CURLY
;
4735 temp
= expand_string_internal(s
, TRUE
, &s
, skipping
);
4736 if (temp
== NULL
) goto EXPAND_FAILED
;
4737 lookup_value
= temp
;
4738 if (*s
++ != '}') goto EXPAND_FAILED_CURLY
;
4741 while (isspace(*s
)) s
++;
4742 if (*s
++ != '{') goto EXPAND_FAILED_CURLY
;
4746 /* For EITEM_FILTER, call eval_condition once, with result discarded (as
4747 if scanning a "false" part). This allows us to find the end of the
4748 condition, because if the list is empty, we won't actually evaluate the
4749 condition for real. For EITEM_MAP and EITEM_REDUCE, do the same, using
4750 the normal internal expansion function. */
4752 if (item_type
== EITEM_FILTER
)
4754 temp
= eval_condition(expr
, NULL
);
4755 if (temp
!= NULL
) s
= temp
;
4759 temp
= expand_string_internal(s
, TRUE
, &s
, TRUE
);
4764 expand_string_message
= string_sprintf("%s inside \"%s\" item",
4765 expand_string_message
, name
);
4769 while (isspace(*s
)) s
++;
4772 expand_string_message
= string_sprintf("missing } at end of condition "
4773 "or expression inside \"%s\"", name
);
4777 while (isspace(*s
)) s
++;
4780 expand_string_message
= string_sprintf("missing } at end of \"%s\"",
4785 /* If we are skipping, we can now just move on to the next item. When
4786 processing for real, we perform the iteration. */
4788 if (skipping
) continue;
4789 while ((iterate_item
= string_nextinlist(&list
, &sep
, NULL
, 0)) != NULL
)
4791 *outsep
= (uschar
)sep
; /* Separator as a string */
4793 DEBUG(D_expand
) debug_printf("%s: $item = \"%s\"\n", name
, iterate_item
);
4795 if (item_type
== EITEM_FILTER
)
4798 if (eval_condition(expr
, &condresult
) == NULL
)
4800 iterate_item
= save_iterate_item
;
4801 lookup_value
= save_lookup_value
;
4802 expand_string_message
= string_sprintf("%s inside \"%s\" condition",
4803 expand_string_message
, name
);
4806 DEBUG(D_expand
) debug_printf("%s: condition is %s\n", name
,
4807 condresult
? "true":"false");
4809 temp
= iterate_item
; /* TRUE => include this item */
4811 continue; /* FALSE => skip this item */
4814 /* EITEM_MAP and EITEM_REDUCE */
4818 temp
= expand_string_internal(expr
, TRUE
, NULL
, skipping
);
4821 iterate_item
= save_iterate_item
;
4822 expand_string_message
= string_sprintf("%s inside \"%s\" item",
4823 expand_string_message
, name
);
4826 if (item_type
== EITEM_REDUCE
)
4828 lookup_value
= temp
; /* Update the value of $value */
4829 continue; /* and continue the iteration */
4833 /* We reach here for FILTER if the condition is true, always for MAP,
4834 and never for REDUCE. The value in "temp" is to be added to the output
4835 list that is being created, ensuring that any occurrences of the
4836 separator character are doubled. Unless we are dealing with the first
4837 item of the output list, add in a space if the new item begins with the
4838 separator character, or is an empty string. */
4840 if (ptr
!= save_ptr
&& (temp
[0] == *outsep
|| temp
[0] == 0))
4841 yield
= string_cat(yield
, &size
, &ptr
, US
" ", 1);
4843 /* Add the string in "temp" to the output list that we are building,
4844 This is done in chunks by searching for the separator character. */
4848 size_t seglen
= Ustrcspn(temp
, outsep
);
4849 yield
= string_cat(yield
, &size
, &ptr
, temp
, seglen
+ 1);
4851 /* If we got to the end of the string we output one character
4852 too many; backup and end the loop. Otherwise arrange to double the
4855 if (temp
[seglen
] == '\0') { ptr
--; break; }
4856 yield
= string_cat(yield
, &size
, &ptr
, outsep
, 1);
4860 /* Output a separator after the string: we will remove the redundant
4861 final one at the end. */
4863 yield
= string_cat(yield
, &size
, &ptr
, outsep
, 1);
4864 } /* End of iteration over the list loop */
4866 /* REDUCE has generated no output above: output the final value of
4869 if (item_type
== EITEM_REDUCE
)
4871 yield
= string_cat(yield
, &size
, &ptr
, lookup_value
,
4872 Ustrlen(lookup_value
));
4873 lookup_value
= save_lookup_value
; /* Restore $value */
4876 /* FILTER and MAP generate lists: if they have generated anything, remove
4877 the redundant final separator. Even though an empty item at the end of a
4878 list does not count, this is tidier. */
4880 else if (ptr
!= save_ptr
) ptr
--;
4882 /* Restore preserved $item */
4884 iterate_item
= save_iterate_item
;
4889 /* If ${dlfunc support is configured, handle calling dynamically-loaded
4890 functions, unless locked out at this time. Syntax is ${dlfunc{file}{func}}
4891 or ${dlfunc{file}{func}{arg}} or ${dlfunc{file}{func}{arg1}{arg2}} or up to
4892 a maximum of EXPAND_DLFUNC_MAX_ARGS arguments (defined below). */
4894 #define EXPAND_DLFUNC_MAX_ARGS 8
4897 #ifndef EXPAND_DLFUNC
4898 expand_string_message
= US
"\"${dlfunc\" encountered, but this facility "
4899 "is not included in this binary";
4902 #else /* EXPAND_DLFUNC */
4905 exim_dlfunc_t
*func
;
4908 uschar
*argv
[EXPAND_DLFUNC_MAX_ARGS
+ 3];
4910 if ((expand_forbid
& RDO_DLFUNC
) != 0)
4912 expand_string_message
=
4913 US
"dynamically-loaded functions are not permitted";
4917 switch(read_subs(argv
, EXPAND_DLFUNC_MAX_ARGS
+ 2, 2, &s
, skipping
,
4920 case 1: goto EXPAND_FAILED_CURLY
;
4922 case 3: goto EXPAND_FAILED
;
4925 /* If skipping, we don't actually do anything */
4927 if (skipping
) continue;
4929 /* Look up the dynamically loaded object handle in the tree. If it isn't
4930 found, dlopen() the file and put the handle in the tree for next time. */
4932 t
= tree_search(dlobj_anchor
, argv
[0]);
4935 void *handle
= dlopen(CS argv
[0], RTLD_LAZY
);
4938 expand_string_message
= string_sprintf("dlopen \"%s\" failed: %s",
4939 argv
[0], dlerror());
4940 log_write(0, LOG_MAIN
|LOG_PANIC
, "%s", expand_string_message
);
4943 t
= store_get_perm(sizeof(tree_node
) + Ustrlen(argv
[0]));
4944 Ustrcpy(t
->name
, argv
[0]);
4945 t
->data
.ptr
= handle
;
4946 (void)tree_insertnode(&dlobj_anchor
, t
);
4949 /* Having obtained the dynamically loaded object handle, look up the
4950 function pointer. */
4952 func
= (exim_dlfunc_t
*)dlsym(t
->data
.ptr
, CS argv
[1]);
4955 expand_string_message
= string_sprintf("dlsym \"%s\" in \"%s\" failed: "
4956 "%s", argv
[1], argv
[0], dlerror());
4957 log_write(0, LOG_MAIN
|LOG_PANIC
, "%s", expand_string_message
);
4961 /* Call the function and work out what to do with the result. If it
4962 returns OK, we have a replacement string; if it returns DEFER then
4963 expansion has failed in a non-forced manner; if it returns FAIL then
4964 failure was forced; if it returns ERROR or any other value there's a
4965 problem, so panic slightly. */
4968 for (argc
= 0; argv
[argc
] != NULL
; argc
++);
4969 status
= func(&result
, argc
- 2, &argv
[2]);
4972 if (result
== NULL
) result
= US
"";
4973 yield
= string_cat(yield
, &size
, &ptr
, result
, Ustrlen(result
));
4978 expand_string_message
= result
== NULL
? US
"(no message)" : result
;
4979 if(status
== FAIL_FORCED
) expand_string_forcedfail
= TRUE
;
4980 else if(status
!= FAIL
)
4981 log_write(0, LOG_MAIN
|LOG_PANIC
, "dlfunc{%s}{%s} failed (%d): %s",
4982 argv
[0], argv
[1], status
, expand_string_message
);
4986 #endif /* EXPAND_DLFUNC */
4989 /* Control reaches here if the name is not recognized as one of the more
4990 complicated expansion items. Check for the "operator" syntax (name terminated
4991 by a colon). Some of the operators have arguments, separated by _ from the
4998 uschar
*sub
= expand_string_internal(s
+1, TRUE
, &s
, skipping
);
4999 if (sub
== NULL
) goto EXPAND_FAILED
;
5002 /* Owing to an historical mis-design, an underscore may be part of the
5003 operator name, or it may introduce arguments. We therefore first scan the
5004 table of names that contain underscores. If there is no match, we cut off
5005 the arguments and then scan the main table. */
5007 c
= chop_match(name
, op_table_underscore
,
5008 sizeof(op_table_underscore
)/sizeof(uschar
*));
5012 arg
= Ustrchr(name
, '_');
5013 if (arg
!= NULL
) *arg
= 0;
5014 c
= chop_match(name
, op_table_main
,
5015 sizeof(op_table_main
)/sizeof(uschar
*));
5016 if (c
>= 0) c
+= sizeof(op_table_underscore
)/sizeof(uschar
*);
5017 if (arg
!= NULL
) *arg
++ = '_'; /* Put back for error messages */
5020 /* If we are skipping, we don't need to perform the operation at all.
5021 This matters for operations like "mask", because the data may not be
5022 in the correct format when skipping. For example, the expression may test
5023 for the existence of $sender_host_address before trying to mask it. For
5024 other operations, doing them may not fail, but it is a waste of time. */
5026 if (skipping
&& c
>= 0) continue;
5028 /* Otherwise, switch on the operator type */
5035 unsigned long int n
= Ustrtoul(sub
, &t
, 10);
5038 expand_string_message
= string_sprintf("argument for base62 "
5039 "operator is \"%s\", which is not a decimal number", sub
);
5042 t
= string_base62(n
);
5043 yield
= string_cat(yield
, &size
, &ptr
, t
, Ustrlen(t
));
5047 /* Note that for Darwin and Cygwin, BASE_62 actually has the value 36 */
5053 unsigned long int n
= 0;
5056 uschar
*t
= Ustrchr(base62_chars
, *tt
++);
5059 expand_string_message
= string_sprintf("argument for base62d "
5060 "operator is \"%s\", which is not a base %d number", sub
,
5064 n
= n
* BASE_62
+ (t
- base62_chars
);
5066 (void)sprintf(CS buf
, "%ld", n
);
5067 yield
= string_cat(yield
, &size
, &ptr
, buf
, Ustrlen(buf
));
5073 uschar
*expanded
= expand_string_internal(sub
, FALSE
, NULL
, skipping
);
5074 if (expanded
== NULL
)
5076 expand_string_message
=
5077 string_sprintf("internal expansion of \"%s\" failed: %s", sub
,
5078 expand_string_message
);
5081 yield
= string_cat(yield
, &size
, &ptr
, expanded
, Ustrlen(expanded
));
5088 uschar
*t
= sub
- 1;
5089 while (*(++t
) != 0) { *t
= tolower(*t
); count
++; }
5090 yield
= string_cat(yield
, &size
, &ptr
, sub
, count
);
5097 uschar
*t
= sub
- 1;
5098 while (*(++t
) != 0) { *t
= toupper(*t
); count
++; }
5099 yield
= string_cat(yield
, &size
, &ptr
, sub
, count
);
5110 md5_end(&base
, sub
, Ustrlen(sub
), digest
);
5111 for(j
= 0; j
< 16; j
++) sprintf(st
+2*j
, "%02x", digest
[j
]);
5112 yield
= string_cat(yield
, &size
, &ptr
, US st
, (int)strlen(st
));
5123 sha1_end(&base
, sub
, Ustrlen(sub
), digest
);
5124 for(j
= 0; j
< 20; j
++) sprintf(st
+2*j
, "%02X", digest
[j
]);
5125 yield
= string_cat(yield
, &size
, &ptr
, US st
, (int)strlen(st
));
5129 /* Convert hex encoding to base64 encoding */
5139 for (enc
= sub
; *enc
!= 0; enc
++)
5141 if (!isxdigit(*enc
))
5143 expand_string_message
= string_sprintf("\"%s\" is not a hex "
5152 expand_string_message
= string_sprintf("\"%s\" contains an odd "
5153 "number of characters", sub
);
5157 while ((c
= *in
++) != 0)
5159 if (isdigit(c
)) c
-= '0';
5160 else c
= toupper(c
) - 'A' + 10;
5172 enc
= auth_b64encode(sub
, out
- sub
);
5173 yield
= string_cat(yield
, &size
, &ptr
, enc
, Ustrlen(enc
));
5177 /* mask applies a mask to an IP address; for example the result of
5178 ${mask:131.111.10.206/28} is 131.111.10.192/28. */
5185 int mask
, maskoffset
;
5186 int type
= string_is_ip_address(sub
, &maskoffset
);
5191 expand_string_message
= string_sprintf("\"%s\" is not an IP address",
5196 if (maskoffset
== 0)
5198 expand_string_message
= string_sprintf("missing mask value in \"%s\"",
5203 mask
= Ustrtol(sub
+ maskoffset
+ 1, &endptr
, 10);
5205 if (*endptr
!= 0 || mask
< 0 || mask
> ((type
== 4)? 32 : 128))
5207 expand_string_message
= string_sprintf("mask value too big in \"%s\"",
5212 /* Convert the address to binary integer(s) and apply the mask */
5214 sub
[maskoffset
] = 0;
5215 count
= host_aton(sub
, binary
);
5216 host_mask(count
, binary
, mask
);
5218 /* Convert to masked textual format and add to output. */
5220 yield
= string_cat(yield
, &size
, &ptr
, buffer
,
5221 host_nmtoa(count
, binary
, mask
, buffer
, '.'));
5226 case EOP_LOCAL_PART
:
5230 int start
, end
, domain
;
5231 uschar
*t
= parse_extract_address(sub
, &error
, &start
, &end
, &domain
,
5235 if (c
!= EOP_DOMAIN
)
5237 if (c
== EOP_LOCAL_PART
&& domain
!= 0) end
= start
+ domain
- 1;
5238 yield
= string_cat(yield
, &size
, &ptr
, sub
+start
, end
-start
);
5240 else if (domain
!= 0)
5243 yield
= string_cat(yield
, &size
, &ptr
, sub
+domain
, end
-domain
);
5251 uschar outsep
[2] = { ':', '\0' };
5252 uschar
*address
, *error
;
5254 int start
, end
, domain
; /* Not really used */
5256 while (isspace(*sub
)) sub
++;
5257 if (*sub
== '>') { *outsep
= *++sub
; ++sub
; }
5258 parse_allow_group
= TRUE
;
5262 uschar
*p
= parse_find_address_end(sub
, FALSE
);
5263 uschar saveend
= *p
;
5265 address
= parse_extract_address(sub
, &error
, &start
, &end
, &domain
,
5269 /* Add the address to the output list that we are building. This is
5270 done in chunks by searching for the separator character. At the
5271 start, unless we are dealing with the first address of the output
5272 list, add in a space if the new address begins with the separator
5273 character, or is an empty string. */
5275 if (address
!= NULL
)
5277 if (ptr
!= save_ptr
&& address
[0] == *outsep
)
5278 yield
= string_cat(yield
, &size
, &ptr
, US
" ", 1);
5282 size_t seglen
= Ustrcspn(address
, outsep
);
5283 yield
= string_cat(yield
, &size
, &ptr
, address
, seglen
+ 1);
5285 /* If we got to the end of the string we output one character
5288 if (address
[seglen
] == '\0') { ptr
--; break; }
5289 yield
= string_cat(yield
, &size
, &ptr
, outsep
, 1);
5290 address
+= seglen
+ 1;
5293 /* Output a separator after the string: we will remove the
5294 redundant final one at the end. */
5296 yield
= string_cat(yield
, &size
, &ptr
, outsep
, 1);
5299 if (saveend
== '\0') break;
5303 /* If we have generated anything, remove the redundant final
5306 if (ptr
!= save_ptr
) ptr
--;
5307 parse_allow_group
= FALSE
;
5312 /* quote puts a string in quotes if it is empty or contains anything
5313 other than alphamerics, underscore, dot, or hyphen.
5315 quote_local_part puts a string in quotes if RFC 2821/2822 requires it to
5316 be quoted in order to be a valid local part.
5318 In both cases, newlines and carriage returns are converted into \n and \r
5322 case EOP_QUOTE_LOCAL_PART
:
5325 BOOL needs_quote
= (*sub
== 0); /* TRUE for empty string */
5326 uschar
*t
= sub
- 1;
5330 while (!needs_quote
&& *(++t
) != 0)
5331 needs_quote
= !isalnum(*t
) && !strchr("_-.", *t
);
5333 else /* EOP_QUOTE_LOCAL_PART */
5335 while (!needs_quote
&& *(++t
) != 0)
5336 needs_quote
= !isalnum(*t
) &&
5337 strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
5338 (*t
!= '.' || t
== sub
|| t
[1] == 0);
5343 yield
= string_cat(yield
, &size
, &ptr
, US
"\"", 1);
5348 yield
= string_cat(yield
, &size
, &ptr
, US
"\\n", 2);
5349 else if (*t
== '\r')
5350 yield
= string_cat(yield
, &size
, &ptr
, US
"\\r", 2);
5353 if (*t
== '\\' || *t
== '"')
5354 yield
= string_cat(yield
, &size
, &ptr
, US
"\\", 1);
5355 yield
= string_cat(yield
, &size
, &ptr
, t
, 1);
5358 yield
= string_cat(yield
, &size
, &ptr
, US
"\"", 1);
5360 else yield
= string_cat(yield
, &size
, &ptr
, sub
, Ustrlen(sub
));
5364 /* quote_lookuptype does lookup-specific quoting */
5369 uschar
*opt
= Ustrchr(arg
, '_');
5371 if (opt
!= NULL
) *opt
++ = 0;
5373 n
= search_findtype(arg
, Ustrlen(arg
));
5376 expand_string_message
= search_error_message
;
5380 if (lookup_list
[n
].quote
!= NULL
)
5381 sub
= (lookup_list
[n
].quote
)(sub
, opt
);
5382 else if (opt
!= NULL
) sub
= NULL
;
5386 expand_string_message
= string_sprintf(
5387 "\"%s\" unrecognized after \"${quote_%s\"",
5392 yield
= string_cat(yield
, &size
, &ptr
, sub
, Ustrlen(sub
));
5396 /* rx quote sticks in \ before any non-alphameric character so that
5397 the insertion works in a regular expression. */
5401 uschar
*t
= sub
- 1;
5405 yield
= string_cat(yield
, &size
, &ptr
, US
"\\", 1);
5406 yield
= string_cat(yield
, &size
, &ptr
, t
, 1);
5411 /* RFC 2047 encodes, assuming headers_charset (default ISO 8859-1) as
5412 prescribed by the RFC, if there are characters that need to be encoded */
5416 uschar buffer
[2048];
5417 uschar
*string
= parse_quote_2047(sub
, Ustrlen(sub
), headers_charset
,
5418 buffer
, sizeof(buffer
), FALSE
);
5419 yield
= string_cat(yield
, &size
, &ptr
, string
, Ustrlen(string
));
5423 /* RFC 2047 decode */
5429 uschar
*decoded
= rfc2047_decode(sub
, check_rfc2047_length
,
5430 headers_charset
, '?', &len
, &error
);
5433 expand_string_message
= error
;
5436 yield
= string_cat(yield
, &size
, &ptr
, decoded
, len
);
5440 /* from_utf8 converts UTF-8 to 8859-1, turning non-existent chars into
5450 if (c
> 255) c
= '_';
5452 yield
= string_cat(yield
, &size
, &ptr
, buff
, 1);
5457 /* escape turns all non-printing characters into escape sequences. */
5461 uschar
*t
= string_printing(sub
);
5462 yield
= string_cat(yield
, &size
, &ptr
, t
, Ustrlen(t
));
5466 /* Handle numeric expression evaluation */
5471 uschar
*save_sub
= sub
;
5472 uschar
*error
= NULL
;
5473 int n
= eval_expr(&sub
, (c
== EOP_EVAL10
), &error
, FALSE
);
5476 expand_string_message
= string_sprintf("error in expression "
5477 "evaluation: %s (after processing \"%.*s\")", error
, sub
-save_sub
,
5481 sprintf(CS var_buffer
, "%d", n
);
5482 yield
= string_cat(yield
, &size
, &ptr
, var_buffer
, Ustrlen(var_buffer
));
5486 /* Handle time period formating */
5490 int n
= readconf_readtime(sub
, 0, FALSE
);
5493 expand_string_message
= string_sprintf("string \"%s\" is not an "
5494 "Exim time interval in \"%s\" operator", sub
, name
);
5497 sprintf(CS var_buffer
, "%d", n
);
5498 yield
= string_cat(yield
, &size
, &ptr
, var_buffer
, Ustrlen(var_buffer
));
5502 case EOP_TIME_INTERVAL
:
5505 uschar
*t
= read_number(&n
, sub
);
5506 if (*t
!= 0) /* Not A Number*/
5508 expand_string_message
= string_sprintf("string \"%s\" is not a "
5509 "positive number in \"%s\" operator", sub
, name
);
5512 t
= readconf_printtime(n
);
5513 yield
= string_cat(yield
, &size
, &ptr
, t
, Ustrlen(t
));
5517 /* Convert string to base64 encoding */
5521 uschar
*encstr
= auth_b64encode(sub
, Ustrlen(sub
));
5522 yield
= string_cat(yield
, &size
, &ptr
, encstr
, Ustrlen(encstr
));
5526 /* strlen returns the length of the string */
5531 (void)sprintf(CS buff
, "%d", Ustrlen(sub
));
5532 yield
= string_cat(yield
, &size
, &ptr
, buff
, Ustrlen(buff
));
5536 /* length_n or l_n takes just the first n characters or the whole string,
5537 whichever is the shorter;
5539 substr_m_n, and s_m_n take n characters from offset m; negative m take
5540 from the end; l_n is synonymous with s_0_n. If n is omitted in substr it
5541 takes the rest, either to the right or to the left.
5543 hash_n or h_n makes a hash of length n from the string, yielding n
5544 characters from the set a-z; hash_n_m makes a hash of length n, but
5545 uses m characters from the set a-zA-Z0-9.
5547 nhash_n returns a single number between 0 and n-1 (in text form), while
5548 nhash_n_m returns a div/mod hash as two numbers "a/b". The first lies
5549 between 0 and n-1 and the second between 0 and m-1. */
5569 expand_string_message
= string_sprintf("missing values after %s",
5574 /* "length" has only one argument, effectively being synonymous with
5577 if (c
== EOP_LENGTH
|| c
== EOP_L
)
5583 /* The others have one or two arguments; for "substr" the first may be
5584 negative. The second being negative means "not supplied". */
5589 if (name
[0] == 's' && *arg
== '-') { sign
= -1; arg
++; }
5592 /* Read up to two numbers, separated by underscores */
5597 if (arg
!= ret
&& *arg
== '_' && pn
== &value1
)
5601 if (arg
[1] != 0) arg
++;
5603 else if (!isdigit(*arg
))
5605 expand_string_message
=
5606 string_sprintf("non-digit after underscore in \"%s\"", name
);
5609 else *pn
= (*pn
)*10 + *arg
++ - '0';
5613 /* Perform the required operation */
5616 (c
== EOP_HASH
|| c
== EOP_H
)?
5617 compute_hash(sub
, value1
, value2
, &len
) :
5618 (c
== EOP_NHASH
|| c
== EOP_NH
)?
5619 compute_nhash(sub
, value1
, value2
, &len
) :
5620 extract_substr(sub
, value1
, value2
, &len
);
5622 if (ret
== NULL
) goto EXPAND_FAILED
;
5623 yield
= string_cat(yield
, &size
, &ptr
, ret
, len
);
5633 uschar
**modetable
[3];
5638 if ((expand_forbid
& RDO_EXISTS
) != 0)
5640 expand_string_message
= US
"Use of the stat() expansion is not permitted";
5644 if (stat(CS sub
, &st
) < 0)
5646 expand_string_message
= string_sprintf("stat(%s) failed: %s",
5647 sub
, strerror(errno
));
5651 switch (mode
& S_IFMT
)
5653 case S_IFIFO
: smode
[0] = 'p'; break;
5654 case S_IFCHR
: smode
[0] = 'c'; break;
5655 case S_IFDIR
: smode
[0] = 'd'; break;
5656 case S_IFBLK
: smode
[0] = 'b'; break;
5657 case S_IFREG
: smode
[0] = '-'; break;
5658 default: smode
[0] = '?'; break;
5661 modetable
[0] = ((mode
& 01000) == 0)? mtable_normal
: mtable_sticky
;
5662 modetable
[1] = ((mode
& 02000) == 0)? mtable_normal
: mtable_setid
;
5663 modetable
[2] = ((mode
& 04000) == 0)? mtable_normal
: mtable_setid
;
5665 for (i
= 0; i
< 3; i
++)
5667 memcpy(CS(smode
+ 7 - i
*3), CS(modetable
[i
][mode
& 7]), 3);
5672 s
= string_sprintf("mode=%04lo smode=%s inode=%ld device=%ld links=%ld "
5673 "uid=%ld gid=%ld size=" OFF_T_FMT
" atime=%ld mtime=%ld ctime=%ld",
5674 (long)(st
.st_mode
& 077777), smode
, (long)st
.st_ino
,
5675 (long)st
.st_dev
, (long)st
.st_nlink
, (long)st
.st_uid
,
5676 (long)st
.st_gid
, st
.st_size
, (long)st
.st_atime
,
5677 (long)st
.st_mtime
, (long)st
.st_ctime
);
5678 yield
= string_cat(yield
, &size
, &ptr
, s
, Ustrlen(s
));
5682 /* Unknown operator */
5685 expand_string_message
=
5686 string_sprintf("unknown expansion operator \"%s\"", name
);
5691 /* Handle a plain name. If this is the first thing in the expansion, release
5692 the pre-allocated buffer. If the result data is known to be in a new buffer,
5693 newsize will be set to the size of that buffer, and we can just point at that
5694 store instead of copying. Many expansion strings contain just one reference,
5695 so this is a useful optimization, especially for humungous headers
5696 ($message_headers). */
5708 value
= find_variable(name
, FALSE
, skipping
, &newsize
);
5711 expand_string_message
=
5712 string_sprintf("unknown variable in \"${%s}\"", name
);
5713 check_variable_error_message(name
);
5716 len
= Ustrlen(value
);
5717 if (yield
== NULL
&& newsize
!= 0)
5723 else yield
= string_cat(yield
, &size
, &ptr
, value
, len
);
5727 /* Else there's something wrong */
5729 expand_string_message
=
5730 string_sprintf("\"${%s\" is not a known operator (or a } is missing "
5731 "in a variable reference)", name
);
5735 /* If we hit the end of the string when ket_ends is set, there is a missing
5736 terminating brace. */
5738 if (ket_ends
&& *s
== 0)
5740 expand_string_message
= malformed_header
?
5741 US
"missing } at end of string - could be header name not terminated by colon"
5743 US
"missing } at end of string";
5747 /* Expansion succeeded; yield may still be NULL here if nothing was actually
5748 added to the string. If so, set up an empty string. Add a terminating zero. If
5749 left != NULL, return a pointer to the terminator. */
5751 if (yield
== NULL
) yield
= store_get(1);
5753 if (left
!= NULL
) *left
= s
;
5755 /* Any stacking store that was used above the final string is no longer needed.
5756 In many cases the final string will be the first one that was got and so there
5757 will be optimal store usage. */
5759 store_reset(yield
+ ptr
+ 1);
5762 debug_printf("expanding: %.*s\n result: %s\n", (int)(s
- string
), string
,
5764 if (skipping
) debug_printf("skipping: result is not used\n");
5768 /* This is the failure exit: easiest to program with a goto. We still need
5769 to update the pointer to the terminator, for cases of nested calls with "fail".
5772 EXPAND_FAILED_CURLY
:
5773 expand_string_message
= malformed_header
?
5774 US
"missing or misplaced { or } - could be header name not terminated by colon"
5776 US
"missing or misplaced { or }";
5778 /* At one point, Exim reset the store to yield (if yield was not NULL), but
5779 that is a bad idea, because expand_string_message is in dynamic store. */
5782 if (left
!= NULL
) *left
= s
;
5785 debug_printf("failed to expand: %s\n", string
);
5786 debug_printf(" error message: %s\n", expand_string_message
);
5787 if (expand_string_forcedfail
) debug_printf("failure was forced\n");
5793 /* This is the external function call. Do a quick check for any expansion
5794 metacharacters, and if there are none, just return the input string.
5796 Argument: the string to be expanded
5797 Returns: the expanded string, or NULL if expansion failed; if failure was
5798 due to a lookup deferring, search_find_defer will be TRUE
5802 expand_string(uschar
*string
)
5804 search_find_defer
= FALSE
;
5805 malformed_header
= FALSE
;
5806 return (Ustrpbrk(string
, "$\\") == NULL
)? string
:
5807 expand_string_internal(string
, FALSE
, NULL
, FALSE
);
5812 /*************************************************
5814 *************************************************/
5816 /* Now and again we want to expand a string and be sure that the result is in a
5817 new bit of store. This function does that.
5819 Argument: the string to be expanded
5820 Returns: the expanded string, always in a new bit of store, or NULL
5824 expand_string_copy(uschar
*string
)
5826 uschar
*yield
= expand_string(string
);
5827 if (yield
== string
) yield
= string_copy(string
);
5833 /*************************************************
5834 * Expand and interpret as an integer *
5835 *************************************************/
5837 /* Expand a string, and convert the result into an integer.
5840 string the string to be expanded
5841 isplus TRUE if a non-negative number is expected
5843 Returns: the integer value, or
5844 -1 for an expansion error ) in both cases, message in
5845 -2 for an integer interpretation error ) expand_string_message
5846 expand_string_message is set NULL for an OK integer
5850 expand_string_integer(uschar
*string
, BOOL isplus
)
5853 uschar
*s
= expand_string(string
);
5854 uschar
*msg
= US
"invalid integer \"%s\"";
5857 /* If expansion failed, expand_string_message will be set. */
5859 if (s
== NULL
) return -1;
5861 /* On an overflow, strtol() returns LONG_MAX or LONG_MIN, and sets errno
5862 to ERANGE. When there isn't an overflow, errno is not changed, at least on some
5863 systems, so we set it zero ourselves. */
5866 expand_string_message
= NULL
; /* Indicates no error */
5867 value
= strtol(CS s
, CSS
&endptr
, 10);
5871 msg
= US
"integer expected but \"%s\" found";
5873 else if (value
< 0 && isplus
)
5875 msg
= US
"non-negative integer expected but \"%s\" found";
5879 /* Ensure we can cast this down to an int */
5880 if (value
> INT_MAX
|| value
< INT_MIN
) errno
= ERANGE
;
5882 if (errno
!= ERANGE
)
5884 if (tolower(*endptr
) == 'k')
5886 if (value
> INT_MAX
/1024 || value
< INT_MIN
/1024) errno
= ERANGE
;
5890 else if (tolower(*endptr
) == 'm')
5892 if (value
> INT_MAX
/(1024*1024) || value
< INT_MIN
/(1024*1024))
5894 else value
*= 1024*1024;
5898 if (errno
== ERANGE
)
5899 msg
= US
"absolute value of integer \"%s\" is too large (overflow)";
5902 while (isspace(*endptr
)) endptr
++;
5903 if (*endptr
== 0) return (int)value
;
5907 expand_string_message
= string_sprintf(CS msg
, s
);
5912 /*************************************************
5913 **************************************************
5914 * Stand-alone test program *
5915 **************************************************
5916 *************************************************/
5922 regex_match_and_setup(const pcre
*re
, uschar
*subject
, int options
, int setup
)
5924 int ovector
[3*(EXPAND_MAXN
+1)];
5925 int n
= pcre_exec(re
, NULL
, subject
, Ustrlen(subject
), 0, PCRE_EOPT
|options
,
5926 ovector
, sizeof(ovector
)/sizeof(int));
5927 BOOL yield
= n
>= 0;
5928 if (n
== 0) n
= EXPAND_MAXN
+ 1;
5932 expand_nmax
= (setup
< 0)? 0 : setup
+ 1;
5933 for (nn
= (setup
< 0)? 0 : 2; nn
< n
*2; nn
+= 2)
5935 expand_nstring
[expand_nmax
] = subject
+ ovector
[nn
];
5936 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
5944 int main(int argc
, uschar
**argv
)
5947 uschar buffer
[1024];
5949 debug_selector
= D_v
;
5950 debug_file
= stderr
;
5951 debug_fd
= fileno(debug_file
);
5952 big_buffer
= malloc(big_buffer_size
);
5954 for (i
= 1; i
< argc
; i
++)
5956 if (argv
[i
][0] == '+')
5958 debug_trace_memory
= 2;
5961 if (isdigit(argv
[i
][0]))
5962 debug_selector
= Ustrtol(argv
[i
], NULL
, 0);
5964 if (Ustrspn(argv
[i
], "abcdefghijklmnopqrtsuvwxyz0123456789-.:/") ==
5968 eldap_default_servers
= argv
[i
];
5971 mysql_servers
= argv
[i
];
5974 pgsql_servers
= argv
[i
];
5978 else opt_perl_startup
= argv
[i
];
5982 printf("Testing string expansion: debug_level = %d\n\n", debug_level
);
5984 expand_nstring
[1] = US
"string 1....";
5985 expand_nlength
[1] = 8;
5989 if (opt_perl_startup
!= NULL
)
5992 printf("Starting Perl interpreter\n");
5993 errstr
= init_perl(opt_perl_startup
);
5996 printf("** error in perl_startup code: %s\n", errstr
);
5997 return EXIT_FAILURE
;
6000 #endif /* EXIM_PERL */
6002 while (fgets(buffer
, sizeof(buffer
), stdin
) != NULL
)
6004 void *reset_point
= store_get(0);
6005 uschar
*yield
= expand_string(buffer
);
6008 printf("%s\n", yield
);
6009 store_reset(reset_point
);
6013 if (search_find_defer
) printf("search_find deferred\n");
6014 printf("Failed: %s\n", expand_string_message
);
6015 if (expand_string_forcedfail
) printf("Forced failure\n");
6027 /* End of expand.c */