1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4 /* Experimental DMARC support.
5 Copyright (c) Todd Lyons <tlyons@exim.org> 2012 - 2014
8 /* Portions Copyright (c) 2012, 2013, The Trusted Domain Project;
9 All rights reserved, licensed for use per LICENSE.opendmarc. */
11 /* Code for calling dmarc checks via libopendmarc. Called from acl.c. */
14 #ifdef EXPERIMENTAL_DMARC
15 #if !defined EXPERIMENTAL_SPF
16 #error SPF must also be enabled for DMARC
17 #elif defined DISABLE_DKIM
18 #error DKIM must also be enabled for DMARC
21 #include "functions.h"
23 #include "pdkim/pdkim.h"
25 OPENDMARC_LIB_T dmarc_ctx
;
26 DMARC_POLICY_T
*dmarc_pctx
= NULL
;
27 OPENDMARC_STATUS_T libdm_status
, action
, dmarc_policy
;
28 OPENDMARC_STATUS_T da
, sa
, action
;
29 BOOL dmarc_abort
= FALSE
;
30 uschar
*dmarc_pass_fail
= US
"skipped";
31 extern pdkim_signature
*dkim_signatures
;
32 header_line
*from_header
= NULL
;
33 extern SPF_response_t
*spf_response
;
34 int dmarc_spf_ares_result
= 0;
35 uschar
*spf_sender_domain
= NULL
;
36 uschar
*spf_human_readable
= NULL
;
37 u_char
*header_from_sender
= NULL
;
38 int history_file_status
= DMARC_HIST_OK
;
39 uschar
*dkim_history_buffer
= NULL
;
41 typedef struct dmarc_exim_p
{
46 static dmarc_exim_p dmarc_policy_description
[] = {
47 { US
"", DMARC_RECORD_P_UNSPECIFIED
},
48 { US
"none", DMARC_RECORD_P_NONE
},
49 { US
"quarantine", DMARC_RECORD_P_QUARANTINE
},
50 { US
"reject", DMARC_RECORD_P_REJECT
},
53 /* Accept an error_block struct, initialize if empty, parse to the
54 * end, and append the two strings passed to it. Used for adding
55 * variable amounts of value:pair data to the forensic emails. */
58 add_to_eblock(error_block
*eblock
, uschar
*t1
, uschar
*t2
)
60 error_block
*eb
= malloc(sizeof(error_block
));
65 /* Find the end of the eblock struct and point it at eb */
66 error_block
*tmp
= eblock
;
67 while(tmp
->next
!= NULL
)
77 /* dmarc_init sets up a context that can be re-used for several
78 messages on the same SMTP connection (that come from the
79 same host with the same HELO string) */
83 int *netmask
= NULL
; /* Ignored */
85 char *tld_file
= (dmarc_tld_file
== NULL
) ?
86 "/etc/exim/opendmarc.tlds" :
87 (char *)dmarc_tld_file
;
89 /* Set some sane defaults. Also clears previous results when
90 * multiple messages in one connection. */
92 dmarc_status
= US
"none";
94 dmarc_pass_fail
= US
"skipped";
95 dmarc_used_domain
= US
"";
96 dmarc_ar_header
= NULL
;
97 dmarc_has_been_checked
= FALSE
;
98 header_from_sender
= NULL
;
99 spf_sender_domain
= NULL
;
100 spf_human_readable
= NULL
;
102 /* ACLs have "control=dmarc_disable_verify" */
103 if (dmarc_disable_verify
== TRUE
)
106 (void) memset(&dmarc_ctx
, '\0', sizeof dmarc_ctx
);
107 dmarc_ctx
.nscount
= 0;
108 libdm_status
= opendmarc_policy_library_init(&dmarc_ctx
);
109 if (libdm_status
!= DMARC_PARSE_OKAY
)
111 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure to init library: %s",
112 opendmarc_policy_status_to_str(libdm_status
));
115 if (dmarc_tld_file
== NULL
)
117 else if (opendmarc_tld_read_file(tld_file
, NULL
, NULL
, NULL
))
119 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure to load tld list %s: %d",
123 if (sender_host_address
== NULL
)
125 /* This catches locally originated email and startup errors above. */
126 if ( dmarc_abort
== FALSE
)
128 is_ipv6
= string_is_ip_address(sender_host_address
, netmask
);
129 is_ipv6
= (is_ipv6
== 6) ? TRUE
:
130 (is_ipv6
== 4) ? FALSE
: FALSE
;
131 dmarc_pctx
= opendmarc_policy_connect_init(sender_host_address
, is_ipv6
);
132 if (dmarc_pctx
== NULL
)
134 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure creating policy context: ip=%s",
135 sender_host_address
);
144 /* dmarc_store_data stores the header data so that subsequent
145 * dmarc_process can access the data */
147 int dmarc_store_data(header_line
*hdr
) {
148 /* No debug output because would change every test debug output */
149 if (dmarc_disable_verify
!= TRUE
)
155 /* dmarc_process adds the envelope sender address to the existing
156 context (if any), retrieves the result, sets up expansion
157 strings and evaluates the condition outcome. */
159 int dmarc_process() {
160 int sr
, origin
; /* used in SPF section */
161 int dmarc_spf_result
= 0; /* stores spf into dmarc conn ctx */
163 pdkim_signature
*sig
= NULL
;
164 BOOL has_dmarc_record
= TRUE
;
165 u_char
**ruf
; /* forensic report addressees, if called for */
167 /* ACLs have "control=dmarc_disable_verify" */
168 if (dmarc_disable_verify
== TRUE
)
170 dmarc_ar_header
= dmarc_auth_results_header(from_header
, NULL
);
174 /* Store the header From: sender domain for this part of DMARC.
175 * If there is no from_header struct, then it's likely this message
176 * is locally generated and relying on fixups to add it. Just skip
177 * the entire DMARC system if we can't find a From: header....or if
178 * there was a previous error.
180 if (from_header
== NULL
|| dmarc_abort
== TRUE
)
184 /* I strongly encourage anybody who can make this better to contact me directly!
185 * <cannonball> Is this an insane way to extract the email address from the From: header?
186 * <jgh_hm> it's sure a horrid layer-crossing....
187 * <cannonball> I'm not denying that :-/
188 * <jgh_hm> there may well be no better though
190 header_from_sender
= expand_string(
191 string_sprintf("${domain:${extract{1}{:}{${addresses:\\N%s\\N}}}}",
192 from_header
->text
) );
193 /* The opendmarc library extracts the domain from the email address, but
194 * only try to store it if it's not empty. Otherwise, skip out of DMARC. */
195 if ((header_from_sender
== NULL
) || (strcmp( CCS header_from_sender
, "") == 0))
197 libdm_status
= (dmarc_abort
== TRUE
) ?
199 opendmarc_policy_store_from_domain(dmarc_pctx
, header_from_sender
);
200 if (libdm_status
!= DMARC_PARSE_OKAY
)
202 log_write(0, LOG_MAIN
|LOG_PANIC
,
203 "failure to store header From: in DMARC: %s, header was '%s'",
204 opendmarc_policy_status_to_str(libdm_status
), from_header
->text
);
209 /* Skip DMARC if connection is SMTP Auth. Temporarily, admin should
210 * instead do this in the ACLs. */
211 if (dmarc_abort
== FALSE
&& sender_host_authenticated
== NULL
)
213 /* Use the envelope sender domain for this part of DMARC */
214 spf_sender_domain
= expand_string(US
"$sender_address_domain");
215 if ( spf_response
== NULL
)
217 /* No spf data means null envelope sender so generate a domain name
218 * from the sender_helo_name */
219 if (spf_sender_domain
== NULL
)
221 spf_sender_domain
= sender_helo_name
;
222 log_write(0, LOG_MAIN
, "DMARC using synthesized SPF sender domain = %s\n",
225 debug_printf("DMARC using synthesized SPF sender domain = %s\n", spf_sender_domain
);
227 dmarc_spf_result
= DMARC_POLICY_SPF_OUTCOME_NONE
;
228 dmarc_spf_ares_result
= ARES_RESULT_UNKNOWN
;
229 origin
= DMARC_POLICY_SPF_ORIGIN_HELO
;
230 spf_human_readable
= US
"";
234 sr
= spf_response
->result
;
235 dmarc_spf_result
= (sr
== SPF_RESULT_NEUTRAL
) ? DMARC_POLICY_SPF_OUTCOME_NONE
:
236 (sr
== SPF_RESULT_PASS
) ? DMARC_POLICY_SPF_OUTCOME_PASS
:
237 (sr
== SPF_RESULT_FAIL
) ? DMARC_POLICY_SPF_OUTCOME_FAIL
:
238 (sr
== SPF_RESULT_SOFTFAIL
) ? DMARC_POLICY_SPF_OUTCOME_TMPFAIL
:
239 DMARC_POLICY_SPF_OUTCOME_NONE
;
240 dmarc_spf_ares_result
= (sr
== SPF_RESULT_NEUTRAL
) ? ARES_RESULT_NEUTRAL
:
241 (sr
== SPF_RESULT_PASS
) ? ARES_RESULT_PASS
:
242 (sr
== SPF_RESULT_FAIL
) ? ARES_RESULT_FAIL
:
243 (sr
== SPF_RESULT_SOFTFAIL
) ? ARES_RESULT_SOFTFAIL
:
244 (sr
== SPF_RESULT_NONE
) ? ARES_RESULT_NONE
:
245 (sr
== SPF_RESULT_TEMPERROR
) ? ARES_RESULT_TEMPERROR
:
246 (sr
== SPF_RESULT_PERMERROR
) ? ARES_RESULT_PERMERROR
:
248 origin
= DMARC_POLICY_SPF_ORIGIN_MAILFROM
;
249 spf_human_readable
= (uschar
*)spf_response
->header_comment
;
251 debug_printf("DMARC using SPF sender domain = %s\n", spf_sender_domain
);
253 if (strcmp( CCS spf_sender_domain
, "") == 0)
255 if (dmarc_abort
== FALSE
)
257 libdm_status
= opendmarc_policy_store_spf(dmarc_pctx
, spf_sender_domain
,
258 dmarc_spf_result
, origin
, spf_human_readable
);
259 if (libdm_status
!= DMARC_PARSE_OKAY
)
260 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store spf for DMARC: %s",
261 opendmarc_policy_status_to_str(libdm_status
));
264 /* Now we cycle through the dkim signature results and put into
265 * the opendmarc context, further building the DMARC reply. */
266 sig
= dkim_signatures
;
267 dkim_history_buffer
= US
"";
270 int dkim_result
, dkim_ares_result
, vs
, ves
;
271 vs
= sig
->verify_status
;
272 ves
= sig
->verify_ext_status
;
273 dkim_result
= ( vs
== PDKIM_VERIFY_PASS
) ? DMARC_POLICY_DKIM_OUTCOME_PASS
:
274 ( vs
== PDKIM_VERIFY_FAIL
) ? DMARC_POLICY_DKIM_OUTCOME_FAIL
:
275 ( vs
== PDKIM_VERIFY_INVALID
) ? DMARC_POLICY_DKIM_OUTCOME_TMPFAIL
:
276 DMARC_POLICY_DKIM_OUTCOME_NONE
;
277 libdm_status
= opendmarc_policy_store_dkim(dmarc_pctx
, (uschar
*)sig
->domain
,
280 debug_printf("DMARC adding DKIM sender domain = %s\n", sig
->domain
);
281 if (libdm_status
!= DMARC_PARSE_OKAY
)
282 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store dkim (%s) for DMARC: %s",
283 sig
->domain
, opendmarc_policy_status_to_str(libdm_status
));
285 dkim_ares_result
= ( vs
== PDKIM_VERIFY_PASS
) ? ARES_RESULT_PASS
:
286 ( vs
== PDKIM_VERIFY_FAIL
) ? ARES_RESULT_FAIL
:
287 ( vs
== PDKIM_VERIFY_NONE
) ? ARES_RESULT_NONE
:
288 ( vs
== PDKIM_VERIFY_INVALID
) ?
289 ( ves
== PDKIM_VERIFY_INVALID_PUBKEY_UNAVAILABLE
? ARES_RESULT_PERMERROR
:
290 ves
== PDKIM_VERIFY_INVALID_BUFFER_SIZE
? ARES_RESULT_PERMERROR
:
291 ves
== PDKIM_VERIFY_INVALID_PUBKEY_PARSING
? ARES_RESULT_PERMERROR
:
292 ARES_RESULT_UNKNOWN
) :
294 dkim_history_buffer
= string_sprintf("%sdkim %s %d\n", dkim_history_buffer
,
295 sig
->domain
, dkim_ares_result
);
298 libdm_status
= opendmarc_policy_query_dmarc(dmarc_pctx
, US
"");
299 switch (libdm_status
)
301 case DMARC_DNS_ERROR_NXDOMAIN
:
302 case DMARC_DNS_ERROR_NO_RECORD
:
304 debug_printf("DMARC no record found for %s\n", header_from_sender
);
305 has_dmarc_record
= FALSE
;
307 case DMARC_PARSE_OKAY
:
309 debug_printf("DMARC record found for %s\n", header_from_sender
);
311 case DMARC_PARSE_ERROR_BAD_VALUE
:
313 debug_printf("DMARC record parse error for %s\n", header_from_sender
);
314 has_dmarc_record
= FALSE
;
317 /* everything else, skip dmarc */
319 debug_printf("DMARC skipping (%d), unsure what to do with %s",
320 libdm_status
, from_header
->text
);
321 has_dmarc_record
= FALSE
;
325 /* Store the policy string in an expandable variable. */
326 libdm_status
= opendmarc_policy_fetch_p(dmarc_pctx
, &tmp_ans
);
327 for (c
=0; dmarc_policy_description
[c
].name
!= NULL
; c
++) {
328 if (tmp_ans
== dmarc_policy_description
[c
].value
) {
329 dmarc_domain_policy
= string_sprintf("%s",dmarc_policy_description
[c
].name
);
334 /* Can't use exim's string manipulation functions so allocate memory
335 * for libopendmarc using its max hostname length definition. */
336 uschar
*dmarc_domain
= (uschar
*)calloc(DMARC_MAXHOSTNAMELEN
, sizeof(uschar
));
337 libdm_status
= opendmarc_policy_fetch_utilized_domain(dmarc_pctx
, dmarc_domain
,
338 DMARC_MAXHOSTNAMELEN
-1);
339 dmarc_used_domain
= string_copy(dmarc_domain
);
341 if (libdm_status
!= DMARC_PARSE_OKAY
)
343 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read domainname used for DMARC lookup: %s",
344 opendmarc_policy_status_to_str(libdm_status
));
346 libdm_status
= opendmarc_get_policy_to_enforce(dmarc_pctx
);
347 dmarc_policy
= libdm_status
;
350 case DMARC_POLICY_ABSENT
: /* No DMARC record found */
351 dmarc_status
= US
"norecord";
352 dmarc_pass_fail
= US
"none";
353 dmarc_status_text
= US
"No DMARC record";
354 action
= DMARC_RESULT_ACCEPT
;
356 case DMARC_FROM_DOMAIN_ABSENT
: /* No From: domain */
357 dmarc_status
= US
"nofrom";
358 dmarc_pass_fail
= US
"temperror";
359 dmarc_status_text
= US
"No From: domain found";
360 action
= DMARC_RESULT_ACCEPT
;
362 case DMARC_POLICY_NONE
: /* Accept and report */
363 dmarc_status
= US
"none";
364 dmarc_pass_fail
= US
"none";
365 dmarc_status_text
= US
"None, Accept";
366 action
= DMARC_RESULT_ACCEPT
;
368 case DMARC_POLICY_PASS
: /* Explicit accept */
369 dmarc_status
= US
"accept";
370 dmarc_pass_fail
= US
"pass";
371 dmarc_status_text
= US
"Accept";
372 action
= DMARC_RESULT_ACCEPT
;
374 case DMARC_POLICY_REJECT
: /* Explicit reject */
375 dmarc_status
= US
"reject";
376 dmarc_pass_fail
= US
"fail";
377 dmarc_status_text
= US
"Reject";
378 action
= DMARC_RESULT_REJECT
;
380 case DMARC_POLICY_QUARANTINE
: /* Explicit quarantine */
381 dmarc_status
= US
"quarantine";
382 dmarc_pass_fail
= US
"fail";
383 dmarc_status_text
= US
"Quarantine";
384 action
= DMARC_RESULT_QUARANTINE
;
387 dmarc_status
= US
"temperror";
388 dmarc_pass_fail
= US
"temperror";
389 dmarc_status_text
= US
"Internal Policy Error";
390 action
= DMARC_RESULT_TEMPFAIL
;
394 libdm_status
= opendmarc_policy_fetch_alignment(dmarc_pctx
, &da
, &sa
);
395 if (libdm_status
!= DMARC_PARSE_OKAY
)
397 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read DMARC alignment: %s",
398 opendmarc_policy_status_to_str(libdm_status
));
401 if (has_dmarc_record
== TRUE
)
403 log_write(0, LOG_MAIN
, "DMARC results: spf_domain=%s dmarc_domain=%s "
404 "spf_align=%s dkim_align=%s enforcement='%s'",
405 spf_sender_domain
, dmarc_used_domain
,
406 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?"yes":"no",
407 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?"yes":"no",
409 history_file_status
= dmarc_write_history_file();
410 /* Now get the forensic reporting addresses, if any */
411 ruf
= opendmarc_policy_fetch_ruf(dmarc_pctx
, NULL
, 0, 1);
412 dmarc_send_forensic_report(ruf
);
416 /* set some global variables here */
417 dmarc_ar_header
= dmarc_auth_results_header(from_header
, NULL
);
419 /* shut down libopendmarc */
420 if ( dmarc_pctx
!= NULL
)
421 (void) opendmarc_policy_connect_shutdown(dmarc_pctx
);
422 if ( dmarc_disable_verify
== FALSE
)
423 (void) opendmarc_policy_library_shutdown(&dmarc_ctx
);
428 int dmarc_write_history_file()
433 u_char
**rua
; /* aggregate report addressees */
434 uschar
*history_buffer
= NULL
;
436 if (dmarc_history_file
== NULL
)
437 return DMARC_HIST_DISABLED
;
438 history_file_fd
= log_create(dmarc_history_file
);
440 if (history_file_fd
< 0)
442 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to create DMARC history file: %s",
444 return DMARC_HIST_FILE_ERR
;
447 /* Generate the contents of the history file */
448 history_buffer
= string_sprintf("job %s\n", message_id
);
449 history_buffer
= string_sprintf("%sreporter %s\n", history_buffer
, primary_hostname
);
450 history_buffer
= string_sprintf("%sreceived %ld\n", history_buffer
, time(NULL
));
451 history_buffer
= string_sprintf("%sipaddr %s\n", history_buffer
, sender_host_address
);
452 history_buffer
= string_sprintf("%sfrom %s\n", history_buffer
, header_from_sender
);
453 history_buffer
= string_sprintf("%smfrom %s\n", history_buffer
,
454 expand_string(US
"$sender_address_domain"));
456 if (spf_response
!= NULL
)
457 history_buffer
= string_sprintf("%sspf %d\n", history_buffer
, dmarc_spf_ares_result
);
458 /* history_buffer = string_sprintf("%sspf -1\n", history_buffer); */
460 history_buffer
= string_sprintf("%s%s", history_buffer
, dkim_history_buffer
);
461 history_buffer
= string_sprintf("%spdomain %s\n", history_buffer
, dmarc_used_domain
);
462 history_buffer
= string_sprintf("%spolicy %d\n", history_buffer
, dmarc_policy
);
464 rua
= opendmarc_policy_fetch_rua(dmarc_pctx
, NULL
, 0, 1);
467 for (tmp_ans
= 0; rua
[tmp_ans
] != NULL
; tmp_ans
++)
469 history_buffer
= string_sprintf("%srua %s\n", history_buffer
, rua
[tmp_ans
]);
473 history_buffer
= string_sprintf("%srua -\n", history_buffer
);
475 opendmarc_policy_fetch_pct(dmarc_pctx
, &tmp_ans
);
476 history_buffer
= string_sprintf("%spct %d\n", history_buffer
, tmp_ans
);
478 opendmarc_policy_fetch_adkim(dmarc_pctx
, &tmp_ans
);
479 history_buffer
= string_sprintf("%sadkim %d\n", history_buffer
, tmp_ans
);
481 opendmarc_policy_fetch_aspf(dmarc_pctx
, &tmp_ans
);
482 history_buffer
= string_sprintf("%saspf %d\n", history_buffer
, tmp_ans
);
484 opendmarc_policy_fetch_p(dmarc_pctx
, &tmp_ans
);
485 history_buffer
= string_sprintf("%sp %d\n", history_buffer
, tmp_ans
);
487 opendmarc_policy_fetch_sp(dmarc_pctx
, &tmp_ans
);
488 history_buffer
= string_sprintf("%ssp %d\n", history_buffer
, tmp_ans
);
490 history_buffer
= string_sprintf("%salign_dkim %d\n", history_buffer
, da
);
491 history_buffer
= string_sprintf("%salign_spf %d\n", history_buffer
, sa
);
492 history_buffer
= string_sprintf("%saction %d\n", history_buffer
, action
);
494 /* Write the contents to the history file */
496 debug_printf("DMARC logging history data for opendmarc reporting%s\n",
497 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
498 if (host_checking
|| running_in_test_harness
)
501 debug_printf("DMARC history data for debugging:\n%s", history_buffer
);
505 written_len
= write_to_fd_buf(history_file_fd
,
507 Ustrlen(history_buffer
));
508 if (written_len
== 0)
510 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to write to DMARC history file: %s",
512 return DMARC_HIST_WRITE_ERR
;
514 (void)close(history_file_fd
);
516 return DMARC_HIST_OK
;
519 void dmarc_send_forensic_report(u_char
**ruf
)
522 uschar
*recipient
, *save_sender
;
523 BOOL send_status
= FALSE
;
524 error_block
*eblock
= NULL
;
525 FILE *message_file
= NULL
;
527 /* Earlier ACL does not have *required* control=dmarc_enable_forensic */
528 if (dmarc_enable_forensic
== FALSE
)
531 if ((dmarc_policy
== DMARC_POLICY_REJECT
&& action
== DMARC_RESULT_REJECT
) ||
532 (dmarc_policy
== DMARC_POLICY_QUARANTINE
&& action
== DMARC_RESULT_QUARANTINE
) )
536 eblock
= add_to_eblock(eblock
, US
"Sender Domain", dmarc_used_domain
);
537 eblock
= add_to_eblock(eblock
, US
"Sender IP Address", sender_host_address
);
538 eblock
= add_to_eblock(eblock
, US
"Received Date", tod_stamp(tod_full
));
539 eblock
= add_to_eblock(eblock
, US
"SPF Alignment",
540 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?US
"yes":US
"no");
541 eblock
= add_to_eblock(eblock
, US
"DKIM Alignment",
542 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?US
"yes":US
"no");
543 eblock
= add_to_eblock(eblock
, US
"DMARC Results", dmarc_status_text
);
544 /* Set a sane default envelope sender */
545 dsn_from
= dmarc_forensic_sender
? dmarc_forensic_sender
:
546 dsn_from
? dsn_from
:
547 string_sprintf("do-not-reply@%s",primary_hostname
);
548 for (c
= 0; ruf
[c
] != NULL
; c
++)
550 recipient
= string_copylc(ruf
[c
]);
551 if (Ustrncmp(recipient
, "mailto:",7))
553 /* Move to first character past the colon */
556 debug_printf("DMARC forensic report to %s%s\n", recipient
,
557 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
558 if (host_checking
|| running_in_test_harness
)
560 save_sender
= sender_address
;
561 sender_address
= recipient
;
562 send_status
= moan_to_sender(ERRMESS_DMARC_FORENSIC
, eblock
,
563 header_list
, message_file
, FALSE
);
564 sender_address
= save_sender
;
565 if (send_status
== FALSE
)
566 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to send DMARC forensic report to %s",
573 uschar
*dmarc_exim_expand_query(int what
)
575 if (dmarc_disable_verify
|| !dmarc_pctx
)
576 return dmarc_exim_expand_defaults(what
);
579 case DMARC_VERIFY_STATUS
:
580 return(dmarc_status
);
586 uschar
*dmarc_exim_expand_defaults(int what
)
589 case DMARC_VERIFY_STATUS
:
590 return (dmarc_disable_verify
) ?
598 uschar
*dmarc_auth_results_header(header_line
*from_header
, uschar
*hostname
)
600 uschar
*hdr_tmp
= US
"";
602 /* Allow a server hostname to be passed to this function, but is
603 * currently unused */
604 if (hostname
== NULL
)
605 hostname
= primary_hostname
;
606 hdr_tmp
= string_sprintf("%s %s;", DMARC_AR_HEADER
, hostname
);
609 /* I don't think this belongs here, but left it here commented out
610 * because it was a lot of work to get working right. */
611 if (spf_response
!= NULL
) {
612 uschar
*dmarc_ar_spf
= US
"";
614 sr
= spf_response
->result
;
615 dmarc_ar_spf
= (sr
== SPF_RESULT_NEUTRAL
) ? US
"neutral" :
616 (sr
== SPF_RESULT_PASS
) ? US
"pass" :
617 (sr
== SPF_RESULT_FAIL
) ? US
"fail" :
618 (sr
== SPF_RESULT_SOFTFAIL
) ? US
"softfail" :
620 hdr_tmp
= string_sprintf("%s spf=%s (%s) smtp.mail=%s;",
621 hdr_tmp
, dmarc_ar_spf_result
,
622 spf_response
->header_comment
,
623 expand_string(US
"$sender_address") );
626 hdr_tmp
= string_sprintf("%s dmarc=%s",
627 hdr_tmp
, dmarc_pass_fail
);
628 if (header_from_sender
)
629 hdr_tmp
= string_sprintf("%s header.from=%s",
630 hdr_tmp
, header_from_sender
);
634 #endif /* EXPERIMENTAL_SPF */
635 #endif /* EXPERIMENTAL_DMARC */