autoconf onak-mail.pl config
[onak.git] / onak-mail.pl.in
diff --git a/onak-mail.pl.in b/onak-mail.pl.in
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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 Project Purple
+# Released under the GPL.
+#
+
+use strict;
+use Fcntl ':flock';
+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'} = $1;
+               } elsif (/^syncsite (.*)/) {
+                       push @{$config{'syncsites'}}, $1;
+               }
+       }
+
+       close(CONFIG);
+
+       return;
+}
+
+#
+# submitupdate
+#
+# Takes an armored OpenPGP stream and submits it to the keyserver. Returns the
+# difference between what we just added and what we had before (ie the least
+# data need to get from what we had to what we have).
+#
+sub submitupdate {
+       my @data = @_;
+       my (@errors, @mergedata);
+
+       open(LOCKFILE, '>'.$config{'db_dir'}.'/onak-mail.lck');
+       flock(LOCKFILE, LOCK_EX);
+       print LOCKFILE "$$";
+
+       open3(\*MERGEIN, \*MERGEOUT, \*MERGEERR,
+               $config{'pks_bin_dir'}."/onak", "-u", "add");
+
+       print MERGEIN @data;
+       close MERGEIN;
+       @mergedata = <MERGEOUT>;
+       close MERGEOUT;
+       @errors = <MERGEERR>;
+       close MERGEERR;
+
+       flock(LOCKFILE, LOCK_UN);
+       close(LOCKFILE);
+
+       return @mergedata;
+}
+
+my ($inheader, %seenby, $subject, $from, $replyto, @body, @syncmail);
+
+$inheader = 1;
+$subject = "";
+&readconfig;
+
+while (<>) {
+       if ($inheader) {
+               if (/^Subject:\s*(.*)\s*$/i) {
+                       $subject = $1;
+               } elsif (/^X-KeyServer-Sent:\s*(.*)\s*$/i) {
+                       $seenby{$1} = 1;
+               } elsif (/^From:\s*(.*)\s*$/i) {
+                       $from = $1;
+               } elsif (/^Reply-To:\s*(.*)\s*$/i) {
+                       $replyto = $1;
+               } elsif (/^$/) {
+                       $inheader = 0;
+               }
+       }
+       if (!$inheader) {
+               push @body, $_;
+       }
+}
+if (! defined($replyto)) {
+       $replyto = $from;
+}
+
+# HELP, ADD, INCREMENTAL, VERBOSE INDEX <keyid>, INDEX <keyid>, GET <keyid>,
+# LAST <days>
+
+if ($subject =~ /^INCREMENTAL$/i) {
+       my $site;
+       my $count;
+       my $i;
+       my @newupdate = submitupdate(@body);
+       my @time;
+
+       $count = 0;
+       foreach $i (@{$config{'syncsites'}}) {
+               if (! defined($seenby{$i})) {
+                       $count++;
+               }
+       }
+
+       open (LOG, ">>$config{'logfile'}");
+       @time = localtime(time);
+       print LOG "[";
+       print LOG sprintf "%02d/%02d/%04d %02d:%02d:%02d",
+               $time[3], $time[4] + 1, $time[5] + 1900,
+               $time[2], $time[1], $time[0];
+       print LOG "] onak-mail[$$]: Syncing with $count sites.\n";
+       close LOG;
+
+       if ((! defined($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";
+       }
+
+       open3(\*INDEXIN, \*INDEXOUT, \*INDEXERR,
+               $config{'pks_bin_dir'}."/onak", $command, "$2");
+       close INDEXIN;
+       @indexdata = <INDEXOUT>;
+       close INDEXOUT;
+       close INDEXERR;
+
+       open(MAIL, "|$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;
+}