-/*************************************************
-* Exim - an Internet mail transport agent *
-*************************************************/
-/* Experimental DMARC support.
- Copyright (c) Todd Lyons <tlyons@exim.org> 2012 - 2014
- License: GPL */
-
-/* Portions Copyright (c) 2012, 2013, The Trusted Domain Project;
- All rights reserved, licensed for use per LICENSE.opendmarc. */
-
-/* Code for calling dmarc checks via libopendmarc. Called from acl.c. */
-
-#include "exim.h"
-#ifdef EXPERIMENTAL_DMARC
-# if !defined EXPERIMENTAL_SPF
-# error SPF must also be enabled for DMARC
-# elif defined DISABLE_DKIM
-# error DKIM must also be enabled for DMARC
-# else
-
-# include "functions.h"
-# include "dmarc.h"
-# include "pdkim/pdkim.h"
-
-OPENDMARC_LIB_T dmarc_ctx;
-DMARC_POLICY_T *dmarc_pctx = NULL;
-OPENDMARC_STATUS_T libdm_status, action, dmarc_policy;
-OPENDMARC_STATUS_T da, sa, action;
-BOOL dmarc_abort = FALSE;
-uschar *dmarc_pass_fail = US"skipped";
-extern pdkim_signature *dkim_signatures;
-header_line *from_header = NULL;
-extern SPF_response_t *spf_response;
-int dmarc_spf_ares_result = 0;
-uschar *spf_sender_domain = NULL;
-uschar *spf_human_readable = NULL;
-u_char *header_from_sender = NULL;
-int history_file_status = DMARC_HIST_OK;
-uschar *dkim_history_buffer= NULL;
-
-typedef struct dmarc_exim_p {
- uschar *name;
- int value;
-} dmarc_exim_p;
-
-static dmarc_exim_p dmarc_policy_description[] = {
- /* name value */
- { US"", DMARC_RECORD_P_UNSPECIFIED },
- { US"none", DMARC_RECORD_P_NONE },
- { US"quarantine", DMARC_RECORD_P_QUARANTINE },
- { US"reject", DMARC_RECORD_P_REJECT },
- { NULL, 0 }
-};
-/* Accept an error_block struct, initialize if empty, parse to the
- * end, and append the two strings passed to it. Used for adding
- * variable amounts of value:pair data to the forensic emails. */
-
-static error_block *
-add_to_eblock(error_block *eblock, uschar *t1, uschar *t2)
-{
-error_block *eb = store_malloc(sizeof(error_block));
-if (eblock == NULL)
- eblock = eb;
-else
- {
- /* Find the end of the eblock struct and point it at eb */
- error_block *tmp = eblock;
- while(tmp->next != NULL)
- tmp = tmp->next;
- tmp->next = eb;
- }
-eb->text1 = t1;
-eb->text2 = t2;
-eb->next = NULL;
-return eblock;
-}
-
-/* dmarc_init sets up a context that can be re-used for several
- messages on the same SMTP connection (that come from the
- same host with the same HELO string) */
-
-int
-dmarc_init()
-{
-int *netmask = NULL; /* Ignored */
-int is_ipv6 = 0;
-char *tld_file = dmarc_tld_file ? CS dmarc_tld_file : DMARC_TLD_FILE;
-
-/* Set some sane defaults. Also clears previous results when
- * multiple messages in one connection. */
-dmarc_pctx = NULL;
-dmarc_status = US"none";
-dmarc_abort = FALSE;
-dmarc_pass_fail = US"skipped";
-dmarc_used_domain = US"";
-dmarc_ar_header = NULL;
-dmarc_has_been_checked = FALSE;
-header_from_sender = NULL;
-spf_sender_domain = NULL;
-spf_human_readable = NULL;
-
-/* ACLs have "control=dmarc_disable_verify" */
-if (dmarc_disable_verify == TRUE)
- return OK;
-
-(void) memset(&dmarc_ctx, '\0', sizeof dmarc_ctx);
-dmarc_ctx.nscount = 0;
-libdm_status = opendmarc_policy_library_init(&dmarc_ctx);
-if (libdm_status != DMARC_PARSE_OKAY)
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "DMARC failure to init library: %s",
- opendmarc_policy_status_to_str(libdm_status));
- dmarc_abort = TRUE;
- }
-if (dmarc_tld_file == NULL)
- dmarc_abort = TRUE;
-else if (opendmarc_tld_read_file(tld_file, NULL, NULL, NULL))
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "DMARC failure to load tld list %s: %d",
- tld_file, errno);
- dmarc_abort = TRUE;
- }
-if (sender_host_address == NULL)
- dmarc_abort = TRUE;
-/* This catches locally originated email and startup errors above. */
-if (!dmarc_abort)
- {
- is_ipv6 = string_is_ip_address(sender_host_address, netmask) == 6;
- dmarc_pctx = opendmarc_policy_connect_init(sender_host_address, is_ipv6);
- if (dmarc_pctx == NULL)
- {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "DMARC failure creating policy context: ip=%s", sender_host_address);
- dmarc_abort = TRUE;
- }
- }
-
-return OK;
-}
-
-
-/* dmarc_store_data stores the header data so that subsequent
- * dmarc_process can access the data */
-
-int dmarc_store_data(header_line *hdr) {
- /* No debug output because would change every test debug output */
- if (dmarc_disable_verify != TRUE)
- from_header = hdr;
- return OK;
-}
-
-
-static void
-dmarc_send_forensic_report(u_char **ruf)
-{
-int c;
-uschar *recipient, *save_sender;
-BOOL send_status = FALSE;
-error_block *eblock = NULL;
-FILE *message_file = NULL;
-
-/* Earlier ACL does not have *required* control=dmarc_enable_forensic */
-if (!dmarc_enable_forensic)
- return;
-
-if ( dmarc_policy == DMARC_POLICY_REJECT && action == DMARC_RESULT_REJECT
- || dmarc_policy == DMARC_POLICY_QUARANTINE && action == DMARC_RESULT_QUARANTINE
- || dmarc_policy == DMARC_POLICY_NONE && action == DMARC_RESULT_REJECT
- || dmarc_policy == DMARC_POLICY_NONE && action == DMARC_RESULT_QUARANTINE
- )
- if (ruf)
- {
- eblock = add_to_eblock(eblock, US"Sender Domain", dmarc_used_domain);
- eblock = add_to_eblock(eblock, US"Sender IP Address", sender_host_address);
- eblock = add_to_eblock(eblock, US"Received Date", tod_stamp(tod_full));
- eblock = add_to_eblock(eblock, US"SPF Alignment",
- (sa==DMARC_POLICY_SPF_ALIGNMENT_PASS) ?US"yes":US"no");
- eblock = add_to_eblock(eblock, US"DKIM Alignment",
- (da==DMARC_POLICY_DKIM_ALIGNMENT_PASS)?US"yes":US"no");
- eblock = add_to_eblock(eblock, US"DMARC Results", dmarc_status_text);
- /* Set a sane default envelope sender */
- dsn_from = dmarc_forensic_sender ? dmarc_forensic_sender :
- dsn_from ? dsn_from :
- string_sprintf("do-not-reply@%s",primary_hostname);
- for (c = 0; ruf[c]; c++)
- {
- recipient = string_copylc(ruf[c]);
- if (Ustrncmp(recipient, "mailto:",7))
- continue;
- /* Move to first character past the colon */
- recipient += 7;
- DEBUG(D_receive)
- debug_printf("DMARC forensic report to %s%s\n", recipient,
- (host_checking || running_in_test_harness) ? " (not really)" : "");
- if (host_checking || running_in_test_harness)
- continue;
-
- save_sender = sender_address;
- sender_address = recipient;
- send_status = moan_to_sender(ERRMESS_DMARC_FORENSIC, eblock,
- header_list, message_file, FALSE);
- sender_address = save_sender;
- if (!send_status)
- log_write(0, LOG_MAIN|LOG_PANIC,
- "failure to send DMARC forensic report to %s", recipient);
- }
- }
-}
-
-/* dmarc_process adds the envelope sender address to the existing
- context (if any), retrieves the result, sets up expansion
- strings and evaluates the condition outcome. */
-
-int
-dmarc_process()
-{
-int sr, origin; /* used in SPF section */
-int dmarc_spf_result = 0; /* stores spf into dmarc conn ctx */
-int tmp_ans, c;
-pdkim_signature *sig = NULL;
-BOOL has_dmarc_record = TRUE;
-u_char **ruf; /* forensic report addressees, if called for */
-
-/* ACLs have "control=dmarc_disable_verify" */
-if (dmarc_disable_verify)
- {
- dmarc_ar_header = dmarc_auth_results_header(from_header, NULL);
- return OK;
- }
-
-/* Store the header From: sender domain for this part of DMARC.
- * If there is no from_header struct, then it's likely this message
- * is locally generated and relying on fixups to add it. Just skip
- * the entire DMARC system if we can't find a From: header....or if
- * there was a previous error.
- */
-if (!from_header || dmarc_abort)
- dmarc_abort = TRUE;
-else
- {
- uschar * errormsg;
- int dummy, domain;
- uschar * p;
- uschar saveend;
-
- parse_allow_group = TRUE;
- p = parse_find_address_end(from_header->text, FALSE);
- saveend = *p; *p = '\0';
- if ((header_from_sender = parse_extract_address(from_header->text, &errormsg,
- &dummy, &dummy, &domain, FALSE)))
- header_from_sender += domain;
- *p = saveend;
-
- /* The opendmarc library extracts the domain from the email address, but
- * only try to store it if it's not empty. Otherwise, skip out of DMARC. */
- if (!header_from_sender || (strcmp( CCS header_from_sender, "") == 0))
- dmarc_abort = TRUE;
- libdm_status = dmarc_abort ?
- DMARC_PARSE_OKAY :
- opendmarc_policy_store_from_domain(dmarc_pctx, header_from_sender);
- if (libdm_status != DMARC_PARSE_OKAY)
- {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "failure to store header From: in DMARC: %s, header was '%s'",
- opendmarc_policy_status_to_str(libdm_status), from_header->text);
- dmarc_abort = TRUE;
- }
- }
-
-/* Skip DMARC if connection is SMTP Auth. Temporarily, admin should
- * instead do this in the ACLs. */
-if (!dmarc_abort && !sender_host_authenticated)
- {
- /* Use the envelope sender domain for this part of DMARC */
- spf_sender_domain = expand_string(US"$sender_address_domain");
- if (!spf_response)
- {
- /* No spf data means null envelope sender so generate a domain name
- * from the sender_helo_name */
- if (!spf_sender_domain)
- {
- spf_sender_domain = sender_helo_name;
- log_write(0, LOG_MAIN, "DMARC using synthesized SPF sender domain = %s\n",
- spf_sender_domain);
- DEBUG(D_receive)
- debug_printf("DMARC using synthesized SPF sender domain = %s\n",
- spf_sender_domain);
- }
- dmarc_spf_result = DMARC_POLICY_SPF_OUTCOME_NONE;
- dmarc_spf_ares_result = ARES_RESULT_UNKNOWN;
- origin = DMARC_POLICY_SPF_ORIGIN_HELO;
- spf_human_readable = US"";
- }
- else
- {
- sr = spf_response->result;
- dmarc_spf_result = sr == SPF_RESULT_NEUTRAL ? DMARC_POLICY_SPF_OUTCOME_NONE :
- sr == SPF_RESULT_PASS ? DMARC_POLICY_SPF_OUTCOME_PASS :
- sr == SPF_RESULT_FAIL ? DMARC_POLICY_SPF_OUTCOME_FAIL :
- sr == SPF_RESULT_SOFTFAIL ? DMARC_POLICY_SPF_OUTCOME_TMPFAIL :
- DMARC_POLICY_SPF_OUTCOME_NONE;
- dmarc_spf_ares_result = sr == SPF_RESULT_NEUTRAL ? ARES_RESULT_NEUTRAL :
- sr == SPF_RESULT_PASS ? ARES_RESULT_PASS :
- sr == SPF_RESULT_FAIL ? ARES_RESULT_FAIL :
- sr == SPF_RESULT_SOFTFAIL ? ARES_RESULT_SOFTFAIL :
- sr == SPF_RESULT_NONE ? ARES_RESULT_NONE :
- sr == SPF_RESULT_TEMPERROR ? ARES_RESULT_TEMPERROR :
- sr == SPF_RESULT_PERMERROR ? ARES_RESULT_PERMERROR :
- ARES_RESULT_UNKNOWN;
- origin = DMARC_POLICY_SPF_ORIGIN_MAILFROM;
- spf_human_readable = US spf_response->header_comment;
- DEBUG(D_receive)
- debug_printf("DMARC using SPF sender domain = %s\n", spf_sender_domain);
- }
- if (strcmp( CCS spf_sender_domain, "") == 0)
- dmarc_abort = TRUE;
- if (!dmarc_abort)
- {
- libdm_status = opendmarc_policy_store_spf(dmarc_pctx, spf_sender_domain,
- dmarc_spf_result, origin, spf_human_readable);
- if (libdm_status != DMARC_PARSE_OKAY)
- log_write(0, LOG_MAIN|LOG_PANIC, "failure to store spf for DMARC: %s",
- opendmarc_policy_status_to_str(libdm_status));
- }
-
- /* Now we cycle through the dkim signature results and put into
- * the opendmarc context, further building the DMARC reply. */
- sig = dkim_signatures;
- dkim_history_buffer = US"";
- while (sig)
- {
- int dkim_result, dkim_ares_result, vs, ves;
- vs = sig->verify_status;
- ves = sig->verify_ext_status;
- dkim_result = vs == PDKIM_VERIFY_PASS ? DMARC_POLICY_DKIM_OUTCOME_PASS :
- vs == PDKIM_VERIFY_FAIL ? DMARC_POLICY_DKIM_OUTCOME_FAIL :
- vs == PDKIM_VERIFY_INVALID ? DMARC_POLICY_DKIM_OUTCOME_TMPFAIL :
- DMARC_POLICY_DKIM_OUTCOME_NONE;
- libdm_status = opendmarc_policy_store_dkim(dmarc_pctx, US sig->domain,
- dkim_result, US"");
- DEBUG(D_receive)
- debug_printf("DMARC adding DKIM sender domain = %s\n", sig->domain);
- if (libdm_status != DMARC_PARSE_OKAY)
- log_write(0, LOG_MAIN|LOG_PANIC,
- "failure to store dkim (%s) for DMARC: %s",
- sig->domain, opendmarc_policy_status_to_str(libdm_status));
-
- dkim_ares_result =
- vs == PDKIM_VERIFY_PASS ? ARES_RESULT_PASS :
- vs == PDKIM_VERIFY_FAIL ? ARES_RESULT_FAIL :
- vs == PDKIM_VERIFY_NONE ? ARES_RESULT_NONE :
- vs == PDKIM_VERIFY_INVALID ?
- ves == PDKIM_VERIFY_INVALID_PUBKEY_UNAVAILABLE ? ARES_RESULT_PERMERROR :
- ves == PDKIM_VERIFY_INVALID_BUFFER_SIZE ? ARES_RESULT_PERMERROR :
- ves == PDKIM_VERIFY_INVALID_PUBKEY_DNSRECORD ? ARES_RESULT_PERMERROR :
- ves == PDKIM_VERIFY_INVALID_PUBKEY_IMPORT ? ARES_RESULT_PERMERROR :
- ARES_RESULT_UNKNOWN :
- ARES_RESULT_UNKNOWN;
- dkim_history_buffer = string_sprintf("%sdkim %s %d\n", dkim_history_buffer,
- sig->domain, dkim_ares_result);
- sig = sig->next;
- }
- libdm_status = opendmarc_policy_query_dmarc(dmarc_pctx, US"");
- switch (libdm_status)
- {
- case DMARC_DNS_ERROR_NXDOMAIN:
- case DMARC_DNS_ERROR_NO_RECORD:
- DEBUG(D_receive)
- debug_printf("DMARC no record found for %s\n", header_from_sender);
- has_dmarc_record = FALSE;
- break;
- case DMARC_PARSE_OKAY:
- DEBUG(D_receive)
- debug_printf("DMARC record found for %s\n", header_from_sender);
- break;
- case DMARC_PARSE_ERROR_BAD_VALUE:
- DEBUG(D_receive)
- debug_printf("DMARC record parse error for %s\n", header_from_sender);
- has_dmarc_record = FALSE;
- break;
- default:
- /* everything else, skip dmarc */
- DEBUG(D_receive)
- debug_printf("DMARC skipping (%d), unsure what to do with %s",
- libdm_status, from_header->text);
- has_dmarc_record = FALSE;
- break;
- }
-
-/* Store the policy string in an expandable variable. */
-
- libdm_status = opendmarc_policy_fetch_p(dmarc_pctx, &tmp_ans);
- for (c = 0; dmarc_policy_description[c].name; c++)
- if (tmp_ans == dmarc_policy_description[c].value)
- {
- dmarc_domain_policy = string_sprintf("%s",dmarc_policy_description[c].name);
- break;
- }
-
- /* Can't use exim's string manipulation functions so allocate memory
- * for libopendmarc using its max hostname length definition. */
-
- uschar *dmarc_domain = US calloc(DMARC_MAXHOSTNAMELEN, sizeof(uschar));
- libdm_status = opendmarc_policy_fetch_utilized_domain(dmarc_pctx,
- dmarc_domain, DMARC_MAXHOSTNAMELEN-1);
- dmarc_used_domain = string_copy(dmarc_domain);
- free(dmarc_domain);
-
- if (libdm_status != DMARC_PARSE_OKAY)
- log_write(0, LOG_MAIN|LOG_PANIC,
- "failure to read domainname used for DMARC lookup: %s",
- opendmarc_policy_status_to_str(libdm_status));
-
- libdm_status = opendmarc_get_policy_to_enforce(dmarc_pctx);
- dmarc_policy = libdm_status;
- switch(libdm_status)
- {
- case DMARC_POLICY_ABSENT: /* No DMARC record found */
- dmarc_status = US"norecord";
- dmarc_pass_fail = US"none";
- dmarc_status_text = US"No DMARC record";
- action = DMARC_RESULT_ACCEPT;
- break;
- case DMARC_FROM_DOMAIN_ABSENT: /* No From: domain */
- dmarc_status = US"nofrom";
- dmarc_pass_fail = US"temperror";
- dmarc_status_text = US"No From: domain found";
- action = DMARC_RESULT_ACCEPT;
- break;
- case DMARC_POLICY_NONE: /* Accept and report */
- dmarc_status = US"none";
- dmarc_pass_fail = US"none";
- dmarc_status_text = US"None, Accept";
- action = DMARC_RESULT_ACCEPT;
- break;
- case DMARC_POLICY_PASS: /* Explicit accept */
- dmarc_status = US"accept";
- dmarc_pass_fail = US"pass";
- dmarc_status_text = US"Accept";
- action = DMARC_RESULT_ACCEPT;
- break;
- case DMARC_POLICY_REJECT: /* Explicit reject */
- dmarc_status = US"reject";
- dmarc_pass_fail = US"fail";
- dmarc_status_text = US"Reject";
- action = DMARC_RESULT_REJECT;
- break;
- case DMARC_POLICY_QUARANTINE: /* Explicit quarantine */
- dmarc_status = US"quarantine";
- dmarc_pass_fail = US"fail";
- dmarc_status_text = US"Quarantine";
- action = DMARC_RESULT_QUARANTINE;
- break;
- default:
- dmarc_status = US"temperror";
- dmarc_pass_fail = US"temperror";
- dmarc_status_text = US"Internal Policy Error";
- action = DMARC_RESULT_TEMPFAIL;
- break;
- }
-
- libdm_status = opendmarc_policy_fetch_alignment(dmarc_pctx, &da, &sa);
- if (libdm_status != DMARC_PARSE_OKAY)
- log_write(0, LOG_MAIN|LOG_PANIC, "failure to read DMARC alignment: %s",
- opendmarc_policy_status_to_str(libdm_status));
-
- if (has_dmarc_record == TRUE)
- {
- log_write(0, LOG_MAIN, "DMARC results: spf_domain=%s dmarc_domain=%s "
- "spf_align=%s dkim_align=%s enforcement='%s'",
- spf_sender_domain, dmarc_used_domain,
- (sa==DMARC_POLICY_SPF_ALIGNMENT_PASS) ?"yes":"no",
- (da==DMARC_POLICY_DKIM_ALIGNMENT_PASS)?"yes":"no",
- dmarc_status_text);
- history_file_status = dmarc_write_history_file();
- /* Now get the forensic reporting addresses, if any */
- ruf = opendmarc_policy_fetch_ruf(dmarc_pctx, NULL, 0, 1);
- dmarc_send_forensic_report(ruf);
- }
- }
-
-/* set some global variables here */
-dmarc_ar_header = dmarc_auth_results_header(from_header, NULL);
-
-/* shut down libopendmarc */
-if ( dmarc_pctx != NULL )
- (void) opendmarc_policy_connect_shutdown(dmarc_pctx);
-if ( dmarc_disable_verify == FALSE )
- (void) opendmarc_policy_library_shutdown(&dmarc_ctx);
-
-return OK;
-}
-
-int
-dmarc_write_history_file()
-{
-int history_file_fd;
-ssize_t written_len;
-int tmp_ans;
-u_char **rua; /* aggregate report addressees */
-uschar *history_buffer = NULL;
-
-if (!dmarc_history_file)
- return DMARC_HIST_DISABLED;
-history_file_fd = log_create(dmarc_history_file);
-
-if (history_file_fd < 0)
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "failure to create DMARC history file: %s",
- dmarc_history_file);
- return DMARC_HIST_FILE_ERR;
- }
-
-/* Generate the contents of the history file */
-history_buffer = string_sprintf(
- "job %s\nreporter %s\nreceived %ld\nipaddr %s\nfrom %s\nmfrom %s\n",
- message_id, primary_hostname, time(NULL), sender_host_address,
- header_from_sender, expand_string(US"$sender_address_domain"));
-
-if (spf_response)
- history_buffer = string_sprintf("%sspf %d\n", history_buffer, dmarc_spf_ares_result);
- /* history_buffer = string_sprintf("%sspf -1\n", history_buffer); */
-
-history_buffer = string_sprintf(
- "%s%spdomain %s\npolicy %d\n",
- history_buffer, dkim_history_buffer, dmarc_used_domain, dmarc_policy);
-
-if ((rua = opendmarc_policy_fetch_rua(dmarc_pctx, NULL, 0, 1)))
- for (tmp_ans = 0; rua[tmp_ans]; tmp_ans++)
- history_buffer = string_sprintf("%srua %s\n", history_buffer, rua[tmp_ans]);
-else
- history_buffer = string_sprintf("%srua -\n", history_buffer);
-
-opendmarc_policy_fetch_pct(dmarc_pctx, &tmp_ans);
-history_buffer = string_sprintf("%spct %d\n", history_buffer, tmp_ans);
-
-opendmarc_policy_fetch_adkim(dmarc_pctx, &tmp_ans);
-history_buffer = string_sprintf("%sadkim %d\n", history_buffer, tmp_ans);
-
-opendmarc_policy_fetch_aspf(dmarc_pctx, &tmp_ans);
-history_buffer = string_sprintf("%saspf %d\n", history_buffer, tmp_ans);
-
-opendmarc_policy_fetch_p(dmarc_pctx, &tmp_ans);
-history_buffer = string_sprintf("%sp %d\n", history_buffer, tmp_ans);
-
-opendmarc_policy_fetch_sp(dmarc_pctx, &tmp_ans);
-history_buffer = string_sprintf("%ssp %d\n", history_buffer, tmp_ans);
-
-history_buffer = string_sprintf(
- "%salign_dkim %d\nalign_spf %d\naction %d\n",
- history_buffer, da, sa, action);
-
-/* Write the contents to the history file */
-DEBUG(D_receive)
- debug_printf("DMARC logging history data for opendmarc reporting%s\n",
- (host_checking || running_in_test_harness) ? " (not really)" : "");
-if (host_checking || running_in_test_harness)
- {
- DEBUG(D_receive)
- debug_printf("DMARC history data for debugging:\n%s", history_buffer);
- }
-else
- {
- written_len = write_to_fd_buf(history_file_fd,
- history_buffer,
- Ustrlen(history_buffer));
- if (written_len == 0)
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "failure to write to DMARC history file: %s",
- dmarc_history_file);
- return DMARC_HIST_WRITE_ERR;
- }
- (void)close(history_file_fd);
- }
-return DMARC_HIST_OK;
-}
-
-
-uschar *
-dmarc_exim_expand_query(int what)
-{
-if (dmarc_disable_verify || !dmarc_pctx)
- return dmarc_exim_expand_defaults(what);
-
-if (what == DMARC_VERIFY_STATUS)
- return dmarc_status;
-return US"";
-}
-
-uschar *
-dmarc_exim_expand_defaults(int what)
-{
-if (what == DMARC_VERIFY_STATUS)
- return dmarc_disable_verify ? US"off" : US"none";
-return US"";
-}
-
-uschar *
-dmarc_auth_results_header(header_line *from_header, uschar *hostname)
-{
-uschar *hdr_tmp = US"";
-
-/* Allow a server hostname to be passed to this function, but is
- * currently unused */
-if (!hostname)
- hostname = primary_hostname;
-hdr_tmp = string_sprintf("%s %s;", DMARC_AR_HEADER, hostname);
-
-#if 0
-/* I don't think this belongs here, but left it here commented out
- * because it was a lot of work to get working right. */
-if (spf_response != NULL) {
- uschar *dmarc_ar_spf = US"";
- int sr = 0;
- sr = spf_response->result;
- dmarc_ar_spf = (sr == SPF_RESULT_NEUTRAL) ? US"neutral" :
- (sr == SPF_RESULT_PASS) ? US"pass" :
- (sr == SPF_RESULT_FAIL) ? US"fail" :
- (sr == SPF_RESULT_SOFTFAIL) ? US"softfail" :
- US"none";
- hdr_tmp = string_sprintf("%s spf=%s (%s) smtp.mail=%s;",
- hdr_tmp, dmarc_ar_spf_result,
- spf_response->header_comment,
- expand_string(US"$sender_address") );
-}
-#endif
-
-hdr_tmp = string_sprintf("%s dmarc=%s", hdr_tmp, dmarc_pass_fail);
-if (header_from_sender)
- hdr_tmp = string_sprintf("%s header.from=%s",
- hdr_tmp, header_from_sender);
-return hdr_tmp;
-}
-
-# endif /* EXPERIMENTAL_SPF */
-#endif /* EXPERIMENTAL_DMARC */
-/* vi: aw ai sw=2
- */
git://git.exim.org / exim.git / blobdiff