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slackbuilds_ponce/network/opendmarc/patches/z03_reportDestVerificationV2.patch
Mario Preksavec fe01e850a8 network/opendmarc: Added (DMARC milter and library). 
Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>
2019-05-17 23:20:52 +07:00

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diff --git b/reports/opendmarc-reports.in a/reports/opendmarc-reports.in
index 43be1ff..fff9f8d 100755
--- b/reports/opendmarc-reports.in
+++ a/reports/opendmarc-reports.in
@@ -24,6 +24,8 @@ use POSIX;
use MIME::Base64;
use Net::SMTP;
use Time::Local;
+use Net::DNS;
+use Domain::PublicSuffix;
require DBD::@SQL_BACKEND@;
@@ -39,7 +41,6 @@ my $showversion = 0;
my $interval;
my $gen;
-my $uri;
my $buf;
@@ -95,8 +96,6 @@ my $dkimdomain;
my $reason;
my $comment;
-my $repdest;
-
my $smtpstatus;
my $smtpfail;
@@ -140,6 +139,18 @@ my $smtp;
my $answer;
+my $suffix;
+my $publicsuffixlist = "/etc/opendmarc/public_suffix_list.dat";
+if (-r $publicsuffixlist) {
+ $suffix = Domain::PublicSuffix->new(
+ { 'data_file' => $publicsuffixlist }
+ );
+}
+else
+{
+ $suffix = Domain::PublicSuffix->new();
+}
+
###
### NO user-serviceable parts beyond this point
###
@@ -172,6 +183,71 @@ sub usage
print STDERR "\t--version print version and exit\n";
}
+sub check_size_restriction
+{
+ my ($destination, $size) = @_;
+ my $report_maxbytes = $report_maxbytes_global;
+
+ # check for max report size
+ if ($destination =~ m/^(\S+)!(\d{1,15})([kmgt])?$/i)
+ {
+ $destination = $1;
+ $report_maxbytes = $2;
+ if ($3)
+ {
+ my $letter = lc($3);
+ if ($letter eq 'k')
+ {
+ $report_maxbytes = $report_maxbytes * 1024;
+ }
+ if ($letter eq 'm')
+ {
+ $report_maxbytes = $report_maxbytes * 1048576;
+ }
+ if ($letter eq 'g')
+ {
+ $report_maxbytes = $report_maxbytes * (2**30);
+ }
+ if ($letter eq 't')
+ {
+ $report_maxbytes = $report_maxbytes * (2**40);
+ }
+ }
+
+ if ($size > $report_maxbytes)
+ {
+ return 0;
+ }
+ }
+ return 1;
+}
+
+sub check_uri
+{
+ my $uri = URI->new($_[0]);
+ if (!defined($uri) ||
+ !defined($uri->scheme) ||
+ $uri->opaque eq "")
+ {
+ print STDERR "$progname: can't parse reporting URI for domain $domain\n";
+ return "";
+ }
+ # ensure a scheme is present
+ elsif (!defined($uri->scheme))
+ {
+ if ($verbose >= 2)
+ {
+ print STDERR "$progname: unknown URI scheme in '$repuri' for domain $domain\n";
+ }
+ return "";
+ }
+ elsif ($uri->scheme eq "mailto")
+ {
+ return $uri->opaque;
+ }
+ return "";
+}
+
# set locale
setlocale(LC_ALL, 'C');
@@ -798,86 +874,181 @@ foreach (@$domainset)
print STDERR "$progname: keeping report file \"$repfile\"\n";
}
+ if (!open($zipin, $zipfile))
+ {
+ print STDERR "$progname: can't read zipped report for $domain: $!\n";
+ next;
+ }
+ my $encoded_report;
+ while (read($zipin, $buf, 60*57))
+ {
+ $encoded_report .= encode_base64($buf);
+ }
+ close($zipin);
+ my $reportsize = length($encoded_report);
+
+ my $repdest = "";
+ my $repdest_fallback = "";
+
# decode the URI
@repuris = split(',', $repuri);
for $repuri (@repuris)
{
- $uri = URI->new($repuri);
- if (!defined($uri) ||
- !defined($uri->scheme) ||
- $uri->opaque eq "")
+ my $raw_address = check_uri($repuri);
+ if ($raw_address eq "")
{
- print STDERR "$progname: can't parse reporting URI for domain $domain\n";
next;
}
-
- $repdest = $uri->opaque;
- my $report_maxbytes = $report_maxbytes_global;
-
- # check for max report size
- if ($repdest =~ m/^(\S+)!(\d{1,15})([kmgt])?$/i)
+ else
{
- $repdest = $1;
- $report_maxbytes = $2;
- if ($3)
+ my $domain_orgdom = $suffix->get_root_domain(lc($domain));
+ my $address = $raw_address;
+ $address =~ s/!\d{1,15}([kmgt])?$//i;
+ my $repdestdomain = $address;
+ $repdestdomain =~ s/.*@//;
+ my $repdest_orgdom = $suffix->get_root_domain(lc($repdestdomain));
+
+ if (defined($domain_orgdom) && defined($repdest_orgdom) && $domain_orgdom eq $repdest_orgdom)
+ {
+ if (check_size_restriction($raw_address, $reportsize))
+ {
+ $repdest .= $address . ", ";
+ }
+ else
+ {
+ $repdest_fallback .= $address . ", ";
+ }
+ }
+ else
{
- my $letter = lc($3);
- if ($letter eq 'k')
+ # validate external report destinations:
+ my $replaced = 0; # external address replaced
+ my $authorized = 0; # external address authorized
+ my $temprepuri;
+ my $res = Net::DNS::Resolver->new(udp_timeout => 15);
+ my $reply = $res->query("$domain._report._dmarc.$repdestdomain", "TXT");
+ if ($reply)
{
- $report_maxbytes = $report_maxbytes * 1024;
+ foreach my $txt ($reply->answer)
+ {
+ next unless $txt->type eq "TXT";
+ my @parts = split(';', $txt->txtdata);
+ my $type = shift @parts;
+ next unless $type =~ m/^\s*v\s*=\s*DMARC1\s*/;
+ $authorized = 1;
+ # just for debugging:
+ if ($txt->txtdata ne "v=DMARC1")
+ {
+ print STDERR "$progname: DEBUG: $domain._report._dmarc.$repdestdomain: query answer: ", $txt->txtdata, "\n";
+ }
+ foreach my $parts (@parts)
+ {
+ if ($parts =~ m/^\s*rua\s*=/)
+ {
+ $replaced = 1;
+ $parts =~ s/^\s*rua\s*=\s*//;
+ foreach my $tempuri (split(',', $parts))
+ {
+ $raw_address = check_uri($tempuri);
+ if ($raw_address eq "")
+ {
+ next;
+ }
+ my $uridomain = lc($raw_address);
+ $uridomain =~ s/.*@//;
+ $uridomain =~ s/!\d{15}([kmgt])?$//;
+ if ($repdestdomain eq $uridomain)
+ {
+ $address =~ s/!\d([kmgt])?$//i;
+ if ($verbose)
+ {
+ print STDERR "$progname: adding new reporting URI for domain $domain: $address\n";
+ }
+ if (check_size_restriction($raw_address, $reportsize))
+ {
+ $repdest .= $address . ", ";
+ }
+ else
+ {
+ $repdest_fallback .= $address . ", ";
+ }
+ }
+ else
+ {
+ if ($verbose)
+ {
+ print STDERR "$progname: ignoring new reporting URI due to differing host parts: $repdestdomain != $uridomain!\n";
+ }
+ }
+ }
+ # there should be only one part with "rua=", so stop here
+ last;
+ }
+ }
+ # there should be only one TXT record starting with "v=DMARC1", so stop here
+ last;
+ }
}
- if ($letter eq 'm')
+ else
{
- $report_maxbytes = $report_maxbytes * 1048576;
+ switch ($res->errorstring)
+ {
+ case "NXDOMAIN" { } # definitely not authorized
+ case "SERVFAIL" { $authorized = 1; } # not a definite answer, so be kind
+ case "query timed out" { $authorized = 1; } # not a definite answer, so be kind
+ else { $authorized = 1; } # for now we authorize anything else
+ }
}
- if ($letter eq 'g')
+
+ if ($authorized && !$replaced)
{
- $report_maxbytes = $report_maxbytes * (2**30);
+
+ $repdest .= $address . ", ";
}
- if ($letter eq 't')
+ elsif (!$authorized)
{
- $report_maxbytes = $report_maxbytes * (2**40);
+ if ($verbose)
+ {
+ print STDERR "$progname: $domain is NOT authorized to send reports to $address, dropping address! (" . $res->errorstring . ")\n";
+ }
+ next;
}
}
}
+ }
+ $repdest =~ s/, $//;
+ $repdest_fallback =~ s/, $//;
- # Test mode, just report what would have been done
- if ($testmode)
+ # Test mode, just report what would have been done
+ if ($testmode)
+ {
+ if ($repdest ne "")
{
print STDERR "$progname: would email $domain report for " .
- "$rowcount records to " . $uri->opaque . "\n";
+ "$rowcount records to $repdest\n";
}
- # ensure a scheme is present
- elsif (!defined($uri->scheme))
+ elsif ($repdest_fallback ne "")
{
- if ($verbose >= 2)
- {
- print STDERR "$progname: unknown URI scheme in '$repuri' for domain $domain\n";
- }
- next;
+ print STDERR "$progname: would email an error report for " .
+ "$domain to $repdest_fallback\n";
}
- # send/post report
- elsif ($uri->scheme eq "mailto")
+ }
+ else
+ {
+ if ($repdest ne "")
{
- my $datestr;
- my $report_id;
-
- if (!open($zipin, $zipfile))
- {
- print STDERR "$progname: can't read zipped report for $domain: $!\n";
- next;
- }
+ # send out the report:
+ $boundary = hostfqdn() . "/" . time();
- $boundary = "report_section";
-
- $report_id = $domain . "-" . $now . "@" . $repdom;
- $datestr = strftime("%a, %e %b %Y %H:%M:%S %z (%Z)",
- localtime);
+ my $report_id = $domain . "-" . $now . "@" . $repdom;
+ my $datestr = strftime("%a, %e %b %Y %H:%M:%S %z (%Z)", localtime);
$mailout = "To: $repdest\n";
$mailout .= "From: $repemail\n";
- $mailout .= "Subject: Report Domain: " . $domain . " Submitter: " . $repdom . " Report-ID: " . $report_id . "\n";
+ $mailout .= "Subject: Report Domain: " . $domain . "\n";
+ $mailout .= " Submitter: " . $repdom . "\n";
+ $mailout .= " Report-ID: " . $report_id . "\n";
$mailout .= "X-Mailer: " . $progname . " v" . $version ."\n";
$mailout .= "Date: " . $datestr . "\n";
$mailout .= "Message-ID: <$report_id>\n";
@@ -898,52 +1069,100 @@ foreach (@$domainset)
$mailout .= "Content-Disposition: attachment; filename=\"$zipfile\"\n";
$mailout .= "Content-Transfer-Encoding: base64\n";
$mailout .= "\n";
+ $mailout .= $encoded_report;
+ $mailout .= "\n";
+ $mailout .= "--$boundary--\n";
+ $smtpstatus = "sent";
+ $smtpfail = 0;
+ if (!$smtp->mail($repemail) ||
+ !$smtp->to(split(', ', $repdest), {SkipBad => 1 }) ||
+ !$smtp->data() ||
+ !$smtp->datasend($mailout) ||
+ !$smtp->dataend())
+ {
+ $smtpfail = 1;
+ $smtpstatus = "failed to send";
+ }
- while (read($zipin, $buf, 60*57))
+ if ($verbose || $smtpfail)
{
- $mailout .= encode_base64($buf);
+ # now perl voodoo:
+ $answer = ${${*$smtp}{'net_cmd_resp'}}[1] || $smtp->message() || 'unknown error';
+ chomp($answer);
+ print STDERR "$progname: $smtpstatus report for $domain to $repdest ($answer)\n";
}
+ $smtp->reset();
+ }
+ elsif ($repdest_fallback ne "")
+ {
+ # send error report to $repdest_fallback:
+ if ($verbose)
+ {
+ print STDERR "$progname: emailing an error report for $domain to $repdest_fallback\n";
+ }
+ $boundary = hostfqdn() . "/" . time();
+
+ my $report_id = $domain . "-" . $now . "@" . $repdom;
+ my $datestr = strftime("%a, %e %b %Y %H:%M:%S %z (%Z)", localtime);
+
+ $mailout = "To: $repdest_fallback\n";
+ $mailout .= "From: $repemail\n";
+ $mailout .= "Subject: Error Report Domain: " . $domain . " Submitter: " . $repdom . " Report-ID: " . $report_id . "\n";
+ $mailout .= "X-Mailer: " . $progname . " v" . $version ."\n";
+ $mailout .= "Date: " . $datestr . "\n";
+ $mailout .= "Message-ID: <$report_id>\n";
+ $mailout .= "Auto-Submitted: auto-generated\n";
+ $mailout .= "MIME-Version: 1.0\n";
+ $mailout .= "Content-Type: multipart/report;\n";
+ $mailout .= " report-type=delivery-status;\n";
+ $mailout .= " boundary=\"$boundary\"\n";
+ $mailout .= "\n";
+ $mailout .= "This is a MIME-encapsulated message.\n";
+ $mailout .= "\n";
+ $mailout .= "--$boundary\n";
+ $mailout .= "Content-Description: DMARC Notification\n";
+ $mailout .= "Content-Type: text/plain\n";
+ $mailout .= "\n";
+ $mailout .= "This is a DMARC error report from host " . hostfqdn() . ".\n";
+ $mailout .= "\n";
+ $mailout .= "I'm sorry to have to inform you that a DMARC aggregate report\n";
+ $mailout .= "could not be delivered to any of your URIs mentioned in your DMARC\n";
+ $mailout .= "DNS resource records because of size limitations.\n";
+ $mailout .= "\n";
+ $mailout .= "--$boundary\n";
+ $mailout .= "Content-Description: DMARC Error Report\n";
+ $mailout .= "Content-Type: text/plain\n";
+ $mailout .= "\n";
+ $mailout .= "Report-Date: " . strftime("%a, %b %e %Y %H:%M:%S %z (%Z)", localtime()) . "\n";
+ $mailout .= "Report-Domain: $domain\n";
+ $mailout .= "Report-ID: $report_id\n";
+ $mailout .= "Report-Size: $reportsize\n";
+ $mailout .= "Submitter: $repdom\n";
+ $mailout .= "Submitting-URI: $repdest_fallback\n";
$mailout .= "\n";
$mailout .= "--$boundary--\n";
- my $reportsize = length($mailout);
-
- if ($reportsize > $report_maxbytes)
+ $smtpstatus = "sent";
+ $smtpfail = 0;
+ if (!$smtp->mail($repemail) ||
+ !$smtp->to(split(', ', $repdest_fallback), { SkipBad => 1 }) ||
+ !$smtp->data() ||
+ !$smtp->datasend($mailout) ||
+ !$smtp->dataend())
{
- # XXX -- generate an error report here
- print STDERR "$progname: report was too large ($reportsize bytes) per limitation of URI " . $uri->opaque . " for domain $domain\n";
+ $smtpfail = 1;
+ $smtpstatus = "failed to send";
}
- else
- {
- $smtpstatus = "sent";
- $smtpfail = 0;
- if (!$smtp->mail($repemail) ||
- !$smtp->to($repdest) ||
- !$smtp->data() ||
- !$smtp->datasend($mailout) ||
- !$smtp->dataend())
- {
- $smtpfail = 1;
- $smtpstatus = "failed to send";
- }
- if ($verbose || $smtpfail)
- {
- # now perl voodoo:
- $answer = ${${*$smtp}{'net_cmd_resp'}}[1] || $smtp->message() || 'unknown error';
- chomp($answer);
- print STDERR "$progname: $smtpstatus report for $domain to $repdest ($answer)\n";
- }
+ if ($verbose || $smtpfail)
+ {
+ # now perl voodoo:
+ $answer = ${${*$smtp}{'net_cmd_resp'}}[1] || $smtp->message() || 'unknown error';
+ chomp($answer);
+ print STDERR "$progname: $smtpstatus failure notice for report for $domain to $repdest ($answer)\n";
}
$smtp->reset();
-
- close($zipin);
- }
- else
- {
- print STDERR "$progname: unsupported reporting URI scheme " . $uri->scheme . " for domain $domain\n";
- next;
}
}
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