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
)
189 parse_allow_group
= TRUE
;
190 p
= parse_find_address_end(from_header
->text
, FALSE
);
191 saveend
= *p
; *p
= '\0';
192 if ((header_from_sender
= parse_extract_address(from_header
->text
, &errormsg
,
193 &dummy
, &dummy
, &domain
, FALSE
)))
194 header_from_sender
+= domain
;
197 /* The opendmarc library extracts the domain from the email address, but
198 * only try to store it if it's not empty. Otherwise, skip out of DMARC. */
199 if (!header_from_sender
|| (strcmp( CCS header_from_sender
, "") == 0))
201 libdm_status
= dmarc_abort
?
203 opendmarc_policy_store_from_domain(dmarc_pctx
, header_from_sender
);
204 if (libdm_status
!= DMARC_PARSE_OKAY
)
206 log_write(0, LOG_MAIN
|LOG_PANIC
,
207 "failure to store header From: in DMARC: %s, header was '%s'",
208 opendmarc_policy_status_to_str(libdm_status
), from_header
->text
);
213 /* Skip DMARC if connection is SMTP Auth. Temporarily, admin should
214 * instead do this in the ACLs. */
215 if (dmarc_abort
== FALSE
&& sender_host_authenticated
== NULL
)
217 /* Use the envelope sender domain for this part of DMARC */
218 spf_sender_domain
= expand_string(US
"$sender_address_domain");
219 if ( spf_response
== NULL
)
221 /* No spf data means null envelope sender so generate a domain name
222 * from the sender_helo_name */
223 if (spf_sender_domain
== NULL
)
225 spf_sender_domain
= sender_helo_name
;
226 log_write(0, LOG_MAIN
, "DMARC using synthesized SPF sender domain = %s\n",
229 debug_printf("DMARC using synthesized SPF sender domain = %s\n", spf_sender_domain
);
231 dmarc_spf_result
= DMARC_POLICY_SPF_OUTCOME_NONE
;
232 dmarc_spf_ares_result
= ARES_RESULT_UNKNOWN
;
233 origin
= DMARC_POLICY_SPF_ORIGIN_HELO
;
234 spf_human_readable
= US
"";
238 sr
= spf_response
->result
;
239 dmarc_spf_result
= (sr
== SPF_RESULT_NEUTRAL
) ? DMARC_POLICY_SPF_OUTCOME_NONE
:
240 (sr
== SPF_RESULT_PASS
) ? DMARC_POLICY_SPF_OUTCOME_PASS
:
241 (sr
== SPF_RESULT_FAIL
) ? DMARC_POLICY_SPF_OUTCOME_FAIL
:
242 (sr
== SPF_RESULT_SOFTFAIL
) ? DMARC_POLICY_SPF_OUTCOME_TMPFAIL
:
243 DMARC_POLICY_SPF_OUTCOME_NONE
;
244 dmarc_spf_ares_result
= (sr
== SPF_RESULT_NEUTRAL
) ? ARES_RESULT_NEUTRAL
:
245 (sr
== SPF_RESULT_PASS
) ? ARES_RESULT_PASS
:
246 (sr
== SPF_RESULT_FAIL
) ? ARES_RESULT_FAIL
:
247 (sr
== SPF_RESULT_SOFTFAIL
) ? ARES_RESULT_SOFTFAIL
:
248 (sr
== SPF_RESULT_NONE
) ? ARES_RESULT_NONE
:
249 (sr
== SPF_RESULT_TEMPERROR
) ? ARES_RESULT_TEMPERROR
:
250 (sr
== SPF_RESULT_PERMERROR
) ? ARES_RESULT_PERMERROR
:
252 origin
= DMARC_POLICY_SPF_ORIGIN_MAILFROM
;
253 spf_human_readable
= (uschar
*)spf_response
->header_comment
;
255 debug_printf("DMARC using SPF sender domain = %s\n", spf_sender_domain
);
257 if (strcmp( CCS spf_sender_domain
, "") == 0)
259 if (dmarc_abort
== FALSE
)
261 libdm_status
= opendmarc_policy_store_spf(dmarc_pctx
, spf_sender_domain
,
262 dmarc_spf_result
, origin
, spf_human_readable
);
263 if (libdm_status
!= DMARC_PARSE_OKAY
)
264 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store spf for DMARC: %s",
265 opendmarc_policy_status_to_str(libdm_status
));
268 /* Now we cycle through the dkim signature results and put into
269 * the opendmarc context, further building the DMARC reply. */
270 sig
= dkim_signatures
;
271 dkim_history_buffer
= US
"";
274 int dkim_result
, dkim_ares_result
, vs
, ves
;
275 vs
= sig
->verify_status
;
276 ves
= sig
->verify_ext_status
;
277 dkim_result
= ( vs
== PDKIM_VERIFY_PASS
) ? DMARC_POLICY_DKIM_OUTCOME_PASS
:
278 ( vs
== PDKIM_VERIFY_FAIL
) ? DMARC_POLICY_DKIM_OUTCOME_FAIL
:
279 ( vs
== PDKIM_VERIFY_INVALID
) ? DMARC_POLICY_DKIM_OUTCOME_TMPFAIL
:
280 DMARC_POLICY_DKIM_OUTCOME_NONE
;
281 libdm_status
= opendmarc_policy_store_dkim(dmarc_pctx
, (uschar
*)sig
->domain
,
284 debug_printf("DMARC adding DKIM sender domain = %s\n", sig
->domain
);
285 if (libdm_status
!= DMARC_PARSE_OKAY
)
286 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store dkim (%s) for DMARC: %s",
287 sig
->domain
, opendmarc_policy_status_to_str(libdm_status
));
289 dkim_ares_result
= ( vs
== PDKIM_VERIFY_PASS
) ? ARES_RESULT_PASS
:
290 ( vs
== PDKIM_VERIFY_FAIL
) ? ARES_RESULT_FAIL
:
291 ( vs
== PDKIM_VERIFY_NONE
) ? ARES_RESULT_NONE
:
292 ( vs
== PDKIM_VERIFY_INVALID
) ?
293 ( ves
== PDKIM_VERIFY_INVALID_PUBKEY_UNAVAILABLE
? ARES_RESULT_PERMERROR
:
294 ves
== PDKIM_VERIFY_INVALID_BUFFER_SIZE
? ARES_RESULT_PERMERROR
:
295 ves
== PDKIM_VERIFY_INVALID_PUBKEY_PARSING
? ARES_RESULT_PERMERROR
:
296 ARES_RESULT_UNKNOWN
) :
298 dkim_history_buffer
= string_sprintf("%sdkim %s %d\n", dkim_history_buffer
,
299 sig
->domain
, dkim_ares_result
);
302 libdm_status
= opendmarc_policy_query_dmarc(dmarc_pctx
, US
"");
303 switch (libdm_status
)
305 case DMARC_DNS_ERROR_NXDOMAIN
:
306 case DMARC_DNS_ERROR_NO_RECORD
:
308 debug_printf("DMARC no record found for %s\n", header_from_sender
);
309 has_dmarc_record
= FALSE
;
311 case DMARC_PARSE_OKAY
:
313 debug_printf("DMARC record found for %s\n", header_from_sender
);
315 case DMARC_PARSE_ERROR_BAD_VALUE
:
317 debug_printf("DMARC record parse error for %s\n", header_from_sender
);
318 has_dmarc_record
= FALSE
;
321 /* everything else, skip dmarc */
323 debug_printf("DMARC skipping (%d), unsure what to do with %s",
324 libdm_status
, from_header
->text
);
325 has_dmarc_record
= FALSE
;
329 /* Store the policy string in an expandable variable. */
330 libdm_status
= opendmarc_policy_fetch_p(dmarc_pctx
, &tmp_ans
);
331 for (c
=0; dmarc_policy_description
[c
].name
!= NULL
; c
++) {
332 if (tmp_ans
== dmarc_policy_description
[c
].value
) {
333 dmarc_domain_policy
= string_sprintf("%s",dmarc_policy_description
[c
].name
);
338 /* Can't use exim's string manipulation functions so allocate memory
339 * for libopendmarc using its max hostname length definition. */
340 uschar
*dmarc_domain
= (uschar
*)calloc(DMARC_MAXHOSTNAMELEN
, sizeof(uschar
));
341 libdm_status
= opendmarc_policy_fetch_utilized_domain(dmarc_pctx
, dmarc_domain
,
342 DMARC_MAXHOSTNAMELEN
-1);
343 dmarc_used_domain
= string_copy(dmarc_domain
);
345 if (libdm_status
!= DMARC_PARSE_OKAY
)
347 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read domainname used for DMARC lookup: %s",
348 opendmarc_policy_status_to_str(libdm_status
));
350 libdm_status
= opendmarc_get_policy_to_enforce(dmarc_pctx
);
351 dmarc_policy
= libdm_status
;
354 case DMARC_POLICY_ABSENT
: /* No DMARC record found */
355 dmarc_status
= US
"norecord";
356 dmarc_pass_fail
= US
"none";
357 dmarc_status_text
= US
"No DMARC record";
358 action
= DMARC_RESULT_ACCEPT
;
360 case DMARC_FROM_DOMAIN_ABSENT
: /* No From: domain */
361 dmarc_status
= US
"nofrom";
362 dmarc_pass_fail
= US
"temperror";
363 dmarc_status_text
= US
"No From: domain found";
364 action
= DMARC_RESULT_ACCEPT
;
366 case DMARC_POLICY_NONE
: /* Accept and report */
367 dmarc_status
= US
"none";
368 dmarc_pass_fail
= US
"none";
369 dmarc_status_text
= US
"None, Accept";
370 action
= DMARC_RESULT_ACCEPT
;
372 case DMARC_POLICY_PASS
: /* Explicit accept */
373 dmarc_status
= US
"accept";
374 dmarc_pass_fail
= US
"pass";
375 dmarc_status_text
= US
"Accept";
376 action
= DMARC_RESULT_ACCEPT
;
378 case DMARC_POLICY_REJECT
: /* Explicit reject */
379 dmarc_status
= US
"reject";
380 dmarc_pass_fail
= US
"fail";
381 dmarc_status_text
= US
"Reject";
382 action
= DMARC_RESULT_REJECT
;
384 case DMARC_POLICY_QUARANTINE
: /* Explicit quarantine */
385 dmarc_status
= US
"quarantine";
386 dmarc_pass_fail
= US
"fail";
387 dmarc_status_text
= US
"Quarantine";
388 action
= DMARC_RESULT_QUARANTINE
;
391 dmarc_status
= US
"temperror";
392 dmarc_pass_fail
= US
"temperror";
393 dmarc_status_text
= US
"Internal Policy Error";
394 action
= DMARC_RESULT_TEMPFAIL
;
398 libdm_status
= opendmarc_policy_fetch_alignment(dmarc_pctx
, &da
, &sa
);
399 if (libdm_status
!= DMARC_PARSE_OKAY
)
401 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read DMARC alignment: %s",
402 opendmarc_policy_status_to_str(libdm_status
));
405 if (has_dmarc_record
== TRUE
)
407 log_write(0, LOG_MAIN
, "DMARC results: spf_domain=%s dmarc_domain=%s "
408 "spf_align=%s dkim_align=%s enforcement='%s'",
409 spf_sender_domain
, dmarc_used_domain
,
410 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?"yes":"no",
411 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?"yes":"no",
413 history_file_status
= dmarc_write_history_file();
414 /* Now get the forensic reporting addresses, if any */
415 ruf
= opendmarc_policy_fetch_ruf(dmarc_pctx
, NULL
, 0, 1);
416 dmarc_send_forensic_report(ruf
);
420 /* set some global variables here */
421 dmarc_ar_header
= dmarc_auth_results_header(from_header
, NULL
);
423 /* shut down libopendmarc */
424 if ( dmarc_pctx
!= NULL
)
425 (void) opendmarc_policy_connect_shutdown(dmarc_pctx
);
426 if ( dmarc_disable_verify
== FALSE
)
427 (void) opendmarc_policy_library_shutdown(&dmarc_ctx
);
432 int dmarc_write_history_file()
437 u_char
**rua
; /* aggregate report addressees */
438 uschar
*history_buffer
= NULL
;
440 if (dmarc_history_file
== NULL
)
441 return DMARC_HIST_DISABLED
;
442 history_file_fd
= log_create(dmarc_history_file
);
444 if (history_file_fd
< 0)
446 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to create DMARC history file: %s",
448 return DMARC_HIST_FILE_ERR
;
451 /* Generate the contents of the history file */
452 history_buffer
= string_sprintf("job %s\n", message_id
);
453 history_buffer
= string_sprintf("%sreporter %s\n", history_buffer
, primary_hostname
);
454 history_buffer
= string_sprintf("%sreceived " TIME_T_FMT
"\n", history_buffer
, time(NULL
));
455 history_buffer
= string_sprintf("%sipaddr %s\n", history_buffer
, sender_host_address
);
456 history_buffer
= string_sprintf("%sfrom %s\n", history_buffer
, header_from_sender
);
457 history_buffer
= string_sprintf("%smfrom %s\n", history_buffer
,
458 expand_string(US
"$sender_address_domain"));
460 if (spf_response
!= NULL
)
461 history_buffer
= string_sprintf("%sspf %d\n", history_buffer
, dmarc_spf_ares_result
);
462 /* history_buffer = string_sprintf("%sspf -1\n", history_buffer); */
464 history_buffer
= string_sprintf("%s%s", history_buffer
, dkim_history_buffer
);
465 history_buffer
= string_sprintf("%spdomain %s\n", history_buffer
, dmarc_used_domain
);
466 history_buffer
= string_sprintf("%spolicy %d\n", history_buffer
, dmarc_policy
);
468 rua
= opendmarc_policy_fetch_rua(dmarc_pctx
, NULL
, 0, 1);
471 for (tmp_ans
= 0; rua
[tmp_ans
] != NULL
; tmp_ans
++)
473 history_buffer
= string_sprintf("%srua %s\n", history_buffer
, rua
[tmp_ans
]);
477 history_buffer
= string_sprintf("%srua -\n", history_buffer
);
479 opendmarc_policy_fetch_pct(dmarc_pctx
, &tmp_ans
);
480 history_buffer
= string_sprintf("%spct %d\n", history_buffer
, tmp_ans
);
482 opendmarc_policy_fetch_adkim(dmarc_pctx
, &tmp_ans
);
483 history_buffer
= string_sprintf("%sadkim %d\n", history_buffer
, tmp_ans
);
485 opendmarc_policy_fetch_aspf(dmarc_pctx
, &tmp_ans
);
486 history_buffer
= string_sprintf("%saspf %d\n", history_buffer
, tmp_ans
);
488 opendmarc_policy_fetch_p(dmarc_pctx
, &tmp_ans
);
489 history_buffer
= string_sprintf("%sp %d\n", history_buffer
, tmp_ans
);
491 opendmarc_policy_fetch_sp(dmarc_pctx
, &tmp_ans
);
492 history_buffer
= string_sprintf("%ssp %d\n", history_buffer
, tmp_ans
);
494 history_buffer
= string_sprintf("%salign_dkim %d\n", history_buffer
, da
);
495 history_buffer
= string_sprintf("%salign_spf %d\n", history_buffer
, sa
);
496 history_buffer
= string_sprintf("%saction %d\n", history_buffer
, action
);
498 /* Write the contents to the history file */
500 debug_printf("DMARC logging history data for opendmarc reporting%s\n",
501 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
502 if (host_checking
|| running_in_test_harness
)
505 debug_printf("DMARC history data for debugging:\n%s", history_buffer
);
509 written_len
= write_to_fd_buf(history_file_fd
,
511 Ustrlen(history_buffer
));
512 if (written_len
== 0)
514 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to write to DMARC history file: %s",
516 return DMARC_HIST_WRITE_ERR
;
518 (void)close(history_file_fd
);
520 return DMARC_HIST_OK
;
523 void dmarc_send_forensic_report(u_char
**ruf
)
526 uschar
*recipient
, *save_sender
;
527 BOOL send_status
= FALSE
;
528 error_block
*eblock
= NULL
;
529 FILE *message_file
= NULL
;
531 /* Earlier ACL does not have *required* control=dmarc_enable_forensic */
532 if (dmarc_enable_forensic
== FALSE
)
535 if ((dmarc_policy
== DMARC_POLICY_REJECT
&& action
== DMARC_RESULT_REJECT
) ||
536 (dmarc_policy
== DMARC_POLICY_QUARANTINE
&& action
== DMARC_RESULT_QUARANTINE
) )
540 eblock
= add_to_eblock(eblock
, US
"Sender Domain", dmarc_used_domain
);
541 eblock
= add_to_eblock(eblock
, US
"Sender IP Address", sender_host_address
);
542 eblock
= add_to_eblock(eblock
, US
"Received Date", tod_stamp(tod_full
));
543 eblock
= add_to_eblock(eblock
, US
"SPF Alignment",
544 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?US
"yes":US
"no");
545 eblock
= add_to_eblock(eblock
, US
"DKIM Alignment",
546 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?US
"yes":US
"no");
547 eblock
= add_to_eblock(eblock
, US
"DMARC Results", dmarc_status_text
);
548 /* Set a sane default envelope sender */
549 dsn_from
= dmarc_forensic_sender
? dmarc_forensic_sender
:
550 dsn_from
? dsn_from
:
551 string_sprintf("do-not-reply@%s",primary_hostname
);
552 for (c
= 0; ruf
[c
] != NULL
; c
++)
554 recipient
= string_copylc(ruf
[c
]);
555 if (Ustrncmp(recipient
, "mailto:",7))
557 /* Move to first character past the colon */
560 debug_printf("DMARC forensic report to %s%s\n", recipient
,
561 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
562 if (host_checking
|| running_in_test_harness
)
564 save_sender
= sender_address
;
565 sender_address
= recipient
;
566 send_status
= moan_to_sender(ERRMESS_DMARC_FORENSIC
, eblock
,
567 header_list
, message_file
, FALSE
);
568 sender_address
= save_sender
;
569 if (send_status
== FALSE
)
570 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to send DMARC forensic report to %s",
577 uschar
*dmarc_exim_expand_query(int what
)
579 if (dmarc_disable_verify
|| !dmarc_pctx
)
580 return dmarc_exim_expand_defaults(what
);
583 case DMARC_VERIFY_STATUS
:
584 return(dmarc_status
);
590 uschar
*dmarc_exim_expand_defaults(int what
)
593 case DMARC_VERIFY_STATUS
:
594 return (dmarc_disable_verify
) ?
602 uschar
*dmarc_auth_results_header(header_line
*from_header
, uschar
*hostname
)
604 uschar
*hdr_tmp
= US
"";
606 /* Allow a server hostname to be passed to this function, but is
607 * currently unused */
608 if (hostname
== NULL
)
609 hostname
= primary_hostname
;
610 hdr_tmp
= string_sprintf("%s %s;", DMARC_AR_HEADER
, hostname
);
613 /* I don't think this belongs here, but left it here commented out
614 * because it was a lot of work to get working right. */
615 if (spf_response
!= NULL
) {
616 uschar
*dmarc_ar_spf
= US
"";
618 sr
= spf_response
->result
;
619 dmarc_ar_spf
= (sr
== SPF_RESULT_NEUTRAL
) ? US
"neutral" :
620 (sr
== SPF_RESULT_PASS
) ? US
"pass" :
621 (sr
== SPF_RESULT_FAIL
) ? US
"fail" :
622 (sr
== SPF_RESULT_SOFTFAIL
) ? US
"softfail" :
624 hdr_tmp
= string_sprintf("%s spf=%s (%s) smtp.mail=%s;",
625 hdr_tmp
, dmarc_ar_spf_result
,
626 spf_response
->header_comment
,
627 expand_string(US
"$sender_address") );
630 hdr_tmp
= string_sprintf("%s dmarc=%s",
631 hdr_tmp
, dmarc_pass_fail
);
632 if (header_from_sender
)
633 hdr_tmp
= string_sprintf("%s header.from=%s",
634 hdr_tmp
, header_from_sender
);
638 #endif /* EXPERIMENTAL_SPF */
639 #endif /* EXPERIMENTAL_DMARC */