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#!/usr/bin/perl -w
#
# onak-mail.pl - Mail processing interface for onak, an OpenPGP Keyserver.
#
# Written by Jonathan McDowell <noodles@earth.li>
# Copyright 2002-2005 Project Purple
# Released under the GPL.
#
use strict;
use Fcntl;
use IO::Handle;
use IPC::Open3;
my %config;
#
# readconfig
#
# Reads in our config file. Ignores any command it doesn't understand rather
# than having to list all the ones that are of no interest to us.
#
sub readconfig {
open(CONFIG, "@CONFIG@") or
die "Can't read config file: $!";
while (<CONFIG>) {
if (/^#/ or /^$/) {
# Ignore; comment line.
} elsif (/^this_site (.*)/) {
$config{'thissite'} = $1;
} elsif (/^logfile (.*)/) {
$config{'logfile'} = $1;
} elsif (/^maintainer_email (.*)/) {
$config{'adminemail'} = $1;
} elsif (/^mail_delivery_client (.*)/) {
$config{'mta'} = $1;
} elsif (/^pks_bin_dir (.*)/) {
$config{'pks_bin_dir'} = $1;
} elsif (/^db_dir (.*)/) {
$config{'db_dir'} = $1;
} elsif (/^mail_dir (.*)/) {
$config{'mail_dir'} = $1;
} elsif (/^syncsite (.*)/) {
push @{$config{'syncsites'}}, $1;
}
}
close(CONFIG);
return;
}
#
# submitupdate
#
# Takes an armored OpenPGP stream and submits it to the keyserver. Returns the
# difference between what we just added and what we had before (ie the least
# data need to get from what we had to what we have).
#
sub submitupdate($) {
my $data = shift;
my (@errors, @mergedata);
my $pid = open3(\*MERGEIN, \*MERGEOUT, \*MERGEERR,
$config{'pks_bin_dir'}."/onak", "-u", "add");
print MERGEIN @$data;
close MERGEIN;
@mergedata = <MERGEOUT>;
close MERGEOUT;
@errors = <MERGEERR>;
close MERGEERR;
waitpid $pid, 0;
return @mergedata;
}
sub processmail($$$$$) {
my $subject = shift;
my $from = shift;
my $replyto = shift;
my $seenby = shift;
my $body = shift;
# HELP, ADD, INCREMENTAL, VERBOSE INDEX <keyid>, INDEX <keyid>,
# GET <keyid>, LAST <days>
if ($subject =~ /^(INCREMENTAL|ADD)$/i) {
my $site;
my $count;
my $i;
my @newupdate = submitupdate($body);
my @time;
$count = 0;
foreach $i (@{$config{'syncsites'}}) {
if (! defined($seenby->{$i})) {
$count++;
}
}
open (LOG, ">>$config{'logfile'}");
@time = localtime(time);
print LOG "[";
print LOG sprintf "%02d/%02d/%04d %02d:%02d:%02d",
$time[3], $time[4] + 1, $time[5] + 1900,
$time[2], $time[1], $time[0];
print LOG "] onak-mail[$$]: Syncing with $count sites.\n";
close LOG;
if ($subject =~ /ADD/i) {
open(MAIL, "|$config{mta}");
print MAIL "From: $config{adminemail}\n";
print MAIL "To: $replyto\n";
print MAIL "Subject: Reply to ADD\n";
print MAIL "Precedence: list\n";
print MAIL "MIME-Version: 1.0\n";
print MAIL "Content-Type: text/plain\n";
print MAIL "\n";
print MAIL "Thank you for your recent key submission.",
" It has been processed and synced\n",
"with ", $count, " other keyservers.\n";
close MAIL;
}
if ((! defined($newupdate[0])) || $newupdate[0] eq '') {
open (LOG, ">>$config{'logfile'}");
print LOG "[";
print LOG sprintf "%02d/%02d/%04d %02d:%02d:%02d",
$time[3], $time[4] + 1, $time[5] + 1900,
$time[2], $time[1], $time[0];
print LOG "] onak-mail[$$]: Nothing to sync.\n";
close LOG;
$count = 0;
}
if ($count > 0) {
open(MAIL, "|$config{mta}");
print MAIL "From: $config{adminemail}\n";
print MAIL "To: ";
foreach $i (@{$config{'syncsites'}}) {
if (! defined($seenby->{$i})) {
print MAIL "$i";
$count--;
if ($count > 0) {
print MAIL ", ";
}
}
}
print MAIL "\n";
print MAIL "Subject: incremental\n";
foreach $site (keys %$seenby) {
print MAIL "X-KeyServer-Sent: $site\n";
}
print MAIL "X-KeyServer-Sent: $config{thissite}\n";
print MAIL "Precedence: list\n";
print MAIL "MIME-Version: 1.0\n";
print MAIL "Content-Type: application/pgp-keys\n";
print MAIL "\n";
print MAIL @newupdate;
close MAIL;
}
} elsif ($subject =~ /^(VERBOSE )?INDEX (.*)$/i) {
my (@indexdata, $command);
$command = "index";
if (defined($1)) {
$command = "vindex";
}
my $pid = open3(\*INDEXIN, \*INDEXOUT, \*INDEXERR,
$config{'pks_bin_dir'}."/onak", $command, "$2");
close INDEXIN;
@indexdata = <INDEXOUT>;
close INDEXOUT;
close INDEXERR;
waitpid $pid, 0;
open(MAIL, "|$config{mta}");
print MAIL "From: $config{adminemail}\n";
print MAIL "To: $replyto\n";
print MAIL "Subject: Reply to INDEX $2\n";
print MAIL "Precedence: list\n";
print MAIL "MIME-Version: 1.0\n";
print MAIL "Content-Type: text/plain\n";
print MAIL "\n";
print MAIL "Below follows the reply to your recent keyserver query:\n";
print MAIL "\n";
print MAIL @indexdata;
close MAIL;
}
}
my ($inheader, %seenby, $subject, $from, $replyto, @body, @syncmail);
&readconfig;
#
# First dump the incoming mail to a file; this means that if we're receiving
# loads of updates we don't spawn lots of processes but instead leave the
# mails on disk to be dealt with sequentially.
#
my @time = localtime;
my $tmpfile = sprintf "%s/%04d%02d%02d-%02d%02d%02d-%d.onak",
$config{'mail_dir'},
$time[5] + 1900,
$time[4],
$time[3],
$time[2],
$time[1],
$time[0],
$$;
open(MAILFILE, '>'.$tmpfile);
while (<>) {
print MAILFILE $_;
}
close(MAILFILE);
#
# Lock here to ensure that only one copy of us is processing the incoming
# mail queue at any point in time.
#
sysopen(LOCKFILE, $config{'db_dir'}.'/onak-mail.lck',
O_WRONLY|O_CREAT|O_EXCL) or exit;
print LOCKFILE "$$";
close(LOCKFILE);
my $file;
opendir(MAILDIR, $config{'mail_dir'});
while ($file = readdir(MAILDIR)) {
next if $file !~ /\.onak$/;
$inheader = 1;
$subject = $from = $replyto = "";
undef %seenby;
@body = ();
open(FILE, '<'.$config{'mail_dir'}.'/'.$file);
while (<FILE>) {
if ($inheader) {
if (/^Subject:\s*(.*)\s*$/i) {
$subject = $1;
} elsif (/^X-KeyServer-Sent:\s*(.*)\s*$/i) {
$seenby{$1} = 1;
} elsif (/^From:\s*(.*)\s*$/i) {
$from = $1;
} elsif (/^Reply-To:\s*(.*)\s*$/i) {
$replyto = $1;
} elsif (/^$/) {
$inheader = 0;
}
}
if (!$inheader) {
push @body, $_;
}
}
if ($replyto eq '') {
$replyto = $from;
}
close(FILE);
unlink $config{'mail_dir'}.'/'.$file;
processmail($subject, $from, $replyto, \%seenby, \@body);
}
closedir(MAILDIR);
unlink $config{'db_dir'}.'/onak-mail.lck';
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