onak-mail.pl.in

   1 #!/usr/bin/perl -w
   2 #
   3 # onak-mail.pl - Mail processing interface for onak, an OpenPGP Keyserver.
   4 #
   5 # Written by Jonathan McDowell <noodles@earth.li>
   6 # Copyright 2002 Project Purple
   7 # Released under the GPL.
   8 #
   9
  10 use strict;
  11 use Fcntl ':flock';
  12 use IPC::Open3;
  13
  14 my %config;
  15
  16 #
  17 # readconfig
  18 #
  19 # Reads in our config file. Ignores any command it doesn't understand rather
  20 # than having to list all the ones that are of no interest to us.
  21 #
  22 sub readconfig {
  23
  24         open(CONFIG, "@CONFIG@") or
  25                 die "Can't read config file: $!";
  26
  27         while (<CONFIG>) {
  28                 if (/^#/ or /^$/) {
  29                         # Ignore; comment line.
  30                 } elsif (/^this_site (.*)/) {
  31                         $config{'thissite'} = $1;
  32                 } elsif (/^logfile (.*)/) {
  33                         $config{'logfile'} = $1;
  34                 } elsif (/^maintainer_email (.*)/) {
  35                         $config{'adminemail'} = $1;
  36                 } elsif (/^mail_delivery_client (.*)/) {
  37                         $config{'mta'} = $1;
  38                 } elsif (/^pks_bin_dir (.*)/) {
  39                         $config{'pks_bin_dir'} = $1;
  40                 } elsif (/^db_dir (.*)/) {
  41                         $config{'db_dir'} = $1;
  42                 } elsif (/^syncsite (.*)/) {
  43                         push @{$config{'syncsites'}}, $1;
  44                 }
  45         }
  46
  47         close(CONFIG);
  48
  49         return;
  50 }
  51
  52 #
  53 # submitupdate
  54 #
  55 # Takes an armored OpenPGP stream and submits it to the keyserver. Returns the
  56 # difference between what we just added and what we had before (ie the least
  57 # data need to get from what we had to what we have).
  58 #
  59 sub submitupdate {
  60         my @data = @_;
  61         my (@errors, @mergedata);
  62
  63         open(LOCKFILE, '>'.$config{'db_dir'}.'/onak-mail.lck');
  64         flock(LOCKFILE, LOCK_EX);
  65         print LOCKFILE "$$";
  66
  67         open3(\*MERGEIN, \*MERGEOUT, \*MERGEERR,
  68                 $config{'pks_bin_dir'}."/onak", "-u", "add");
  69
  70         print MERGEIN @data;
  71         close MERGEIN;
  72         @mergedata = <MERGEOUT>;
  73         close MERGEOUT;
  74         @errors = <MERGEERR>;
  75         close MERGEERR;
  76
  77         flock(LOCKFILE, LOCK_UN);
  78         close(LOCKFILE);
  79
  80         return @mergedata;
  81 }
  82
  83 my ($inheader, %seenby, $subject, $from, $replyto, @body, @syncmail);
  84
  85 $inheader = 1;
  86 $subject = "";
  87 &readconfig;
  88
  89 while (<>) {
  90         if ($inheader) {
  91                 if (/^Subject:\s*(.*)\s*$/i) {
  92                         $subject = $1;
  93                 } elsif (/^X-KeyServer-Sent:\s*(.*)\s*$/i) {
  94                         $seenby{$1} = 1;
  95                 } elsif (/^From:\s*(.*)\s*$/i) {
  96                         $from = $1;
  97                 } elsif (/^Reply-To:\s*(.*)\s*$/i) {
  98                         $replyto = $1;
  99                 } elsif (/^$/) {
 100                         $inheader = 0;
 101                 }
 102         }
 103         if (!$inheader) {
 104                 push @body, $_;
 105         }
 106 }
 107 if (! defined($replyto)) {
 108         $replyto = $from;
 109 }
 110
 111 # HELP, ADD, INCREMENTAL, VERBOSE INDEX <keyid>, INDEX <keyid>, GET <keyid>,
 112 # LAST <days>
 113
 114 if ($subject =~ /^INCREMENTAL$/i) {
 115         my $site;
 116         my $count;
 117         my $i;
 118         my @newupdate = submitupdate(@body);
 119         my @time;
 120
 121         $count = 0;
 122         foreach $i (@{$config{'syncsites'}}) {
 123                 if (! defined($seenby{$i})) {
 124                         $count++;
 125                 }
 126         }
 127
 128         open (LOG, ">>$config{'logfile'}");
 129         @time = localtime(time);
 130         print LOG "[";
 131         print LOG sprintf "%02d/%02d/%04d %02d:%02d:%02d",
 132                 $time[3], $time[4] + 1, $time[5] + 1900,
 133                 $time[2], $time[1], $time[0];
 134         print LOG "] onak-mail[$$]: Syncing with $count sites.\n";
 135         close LOG;
 136
 137         if ((! defined($newupdate[0])) || $newupdate[0] eq '') {
 138                 open (LOG, ">>$config{'logfile'}");
 139                 print LOG "[";
 140                 print LOG sprintf "%02d/%02d/%04d %02d:%02d:%02d",
 141                         $time[3], $time[4] + 1, $time[5] + 1900,
 142                         $time[2], $time[1], $time[0];
 143                 print LOG "] onak-mail[$$]: Nothing to sync.\n";
 144                 close LOG;
 145                 $count = 0;
 146         }
 147
 148         if ($count > 0) {
 149                 open(MAIL, "|$config{mta}");
 150                 print MAIL "From: $config{adminemail}\n";
 151                 print MAIL "To: ";
 152                 foreach $i (@{$config{'syncsites'}}) {
 153                         if (! defined($seenby{$i})) {
 154                                 print MAIL "$i";
 155                                 $count--;
 156                                 if ($count > 0) {
 157                                         print MAIL ", ";
 158                                 }
 159                         }
 160                 }
 161                 print MAIL "\n";
 162                 print MAIL "Subject: incremental\n";
 163                 foreach $site (keys %seenby) {
 164                         print MAIL "X-KeyServer-Sent: $site\n";
 165                 }
 166                 print MAIL "X-KeyServer-Sent: $config{thissite}\n";
 167                 print MAIL "Precedence: list\n";
 168                 print MAIL "MIME-Version: 1.0\n";
 169                 print MAIL "Content-Type: application/pgp-keys\n";
 170                 print MAIL "\n";
 171                 print MAIL @newupdate;
 172                 close MAIL;
 173         }
 174 } elsif ($subject =~ /^(VERBOSE )?INDEX (.*)$/i) {
 175         my (@indexdata, $command);
 176
 177         $command = "index";
 178         if (defined($1)) {
 179                 $command = "vindex";
 180         }
 181
 182         open3(\*INDEXIN, \*INDEXOUT, \*INDEXERR,
 183                 $config{'pks_bin_dir'}."/onak", $command, "$2");
 184         close INDEXIN;
 185         @indexdata = <INDEXOUT>;
 186         close INDEXOUT;
 187         close INDEXERR;
 188
 189         open(MAIL, "|$config{mta}");
 190         print MAIL "From: $config{adminemail}\n";
 191         print MAIL "To: $replyto\n";
 192         print MAIL "Subject: Reply to INDEX $2\n";
 193         print MAIL "Precedence: list\n";
 194         print MAIL "MIME-Version: 1.0\n";
 195         print MAIL "Content-Type: text/plain\n";
 196         print MAIL "\n";
 197         print MAIL "Below follows the reply to your recent keyserver query:\n";
 198         print MAIL "\n";
 199         print MAIL @indexdata;
 200         close MAIL;
 201 }