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package Echolot::Conf;
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# (c) 2002 Peter Palfrader <peter@palfrader.org>
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# $Id: Conf.pm,v 1.23 2002/07/22 02:18:30 weasel Exp $
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#
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=pod
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=head1 Name
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Echolot::Conf - remailer Configuration/Capabilities
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=head1 DESCRIPTION
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This package provides functions for requesting, parsing, and analyzing
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remailer-conf and remailer-key replies.
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=head1 CAVEATS
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When parsing OpenPGP keys only the address of the primary user id is taken into
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account (This is the one with the latest self signature I think).
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=cut
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use strict;
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use Carp qw{cluck};
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use GnuPG::Interface;
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use IO::Handle;
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sub is_not_a_remailer($) {
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my ($reply) = @_;
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if ($reply =~ /^\s* not \s+ a \s+ remailer\b/xi) {
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return 1;
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} else {
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return 0;
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};
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};
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sub send_requests($;$) {
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my ($scheduled_for, $which) = @_;
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$which = '' unless defined $which;
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my $call_intervall = Echolot::Config::get()->{'getkeyconf_interval'};
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my $send_every_n_calls = Echolot::Config::get()->{'getkeyconf_every_nth_time'};
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my $timemod = ($scheduled_for / $call_intervall);
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my $this_call_id = $timemod % $send_every_n_calls;
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Echolot::Globals::get()->{'storage'}->delay_commit();
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for my $remailer (Echolot::Globals::get()->{'storage'}->get_addresses()) {
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next unless ($remailer->{'status'} eq 'active');
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next unless ($remailer->{'fetch'});
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my $address = $remailer->{'address'};
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for my $type (qw{conf key help stats adminkey}) {
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next if ($this_call_id ne (Echolot::Tools::makeShortNumHash($address.$type) % $send_every_n_calls) &&
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$which ne 'all' &&
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$which ne $address );
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print "Sending $type requests to ".$address."\n"
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if Echolot::Config::get()->{'verbose'};
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my $source_text = Echolot::Config::get()->{'remailerxxxtext'};
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my $template = HTML::Template->new(
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scalarref => \$source_text,
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strict => 0,
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global_vars => 1 );
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$template->param ( address => $address );
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$template->param ( operator_address => Echolot::Config::get()->{'operator_address'} );
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my $body = $template->output();
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Echolot::Tools::send_message(
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'To' => $address,
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'Subject' => 'remailer-'.$type,
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'Token' => $type.'.'.$remailer->{'id'},
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'Body' => $body);
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Echolot::Globals::get()->{'storage'}->decrease_ttl($address) if ($type eq 'conf');
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};
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};
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Echolot::Globals::get()->{'storage'}->enable_commit();
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};
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sub check_resurrection() {
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Echolot::Globals::get()->{'storage'}->delay_commit();
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for my $remailer (Echolot::Globals::get()->{'storage'}->get_addresses()) {
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next unless ($remailer->{'status'} eq 'ttl timeout');
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next unless ($remailer->{'fetch'});
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next unless ($remailer->{'resurrection_ttl'});
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print "Sending requests to ".$remailer->{'address'}." to check for resurrection\n"
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if Echolot::Config::get()->{'verbose'};
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for my $type (qw{conf key help stats adminkey}) {
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Echolot::Tools::send_message(
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'To' => $remailer->{'address'},
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'Subject' => 'remailer-'.$type,
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'Token' => $type.'.'.$remailer->{'id'})
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};
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Echolot::Globals::get()->{'storage'}->decrease_resurrection_ttl($remailer->{'address'});
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};
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Echolot::Globals::get()->{'storage'}->enable_commit();
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};
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sub remailer_caps($$$;$) {
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my ($conf, $token, $time, $dontexpire) = @_;
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my ($id) = $token =~ /^conf\.(\d+)$/;
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(defined $id) or
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cluck ("Returned token '$token' has no id at all"),
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return 0;
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cluck("Could not find id in token '$token'"), return 0 unless defined $id;
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my ($remailer_type) = ($conf =~ /^\s*Remailer-Type:\s* (.*?) \s*$/imx);
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cluck("No remailer type found in remailer_caps from '$token'"), return 0 unless defined $remailer_type;
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my ($remailer_caps) = ($conf =~ /^\s*( \$remailer{".*"} \s*=\s* "<.*@.*>.*"; )\s*$/imx);
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cluck("No remailer caps found in remailer_caps from '$token'"), return 0 unless defined $remailer_caps;
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my ($remailer_nick, $remailer_address) = ($remailer_caps =~ /^\s* \$remailer{"(.*)"} \s*=\s* "<(.*@.*)>.*"; \s*$/ix);
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cluck("No remailer nick found in remailer_caps from '$token': '$remailer_caps'"), return 0 unless defined $remailer_nick;
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cluck("No remailer address found in remailer_caps from '$token': '$remailer_caps'"), return 0 unless defined $remailer_address;
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my $remailer = Echolot::Globals::get()->{'storage'}->get_address_by_id($id);
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cluck("No remailer found for id '$id'"), return 0 unless defined $remailer;
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if ($remailer->{'address'} ne $remailer_address) {
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# Address mismatch -> Ignore reply and add $remailer_address to prospective addresses
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cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address. Adding latter to prospective remailers.");
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Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-conf', $remailer_address);
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} else {
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Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} );
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Echolot::Globals::get()->{'storage'}->set_caps($remailer_type, $remailer_caps, $remailer_nick, $remailer_address, $time, $dontexpire);
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# if remailer is cpunk and not pgponly
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if (($remailer_caps =~ /\bcpunk\b/) && !($remailer_caps =~ /\bpgponly\b/)) {
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Echolot::Globals::get()->{'storage'}->set_key(
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'cpunk-clear',
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$remailer_nick,
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$remailer->{'address'},
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'N/A',
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'none',
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'N/A',
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'N/A',
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'N/A',
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$time);
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}
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}
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# Fetch prospective remailers from reliable's remailer-conf reply:
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my @lines = split /\r?\n/, $conf;
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while (@lines) {
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my $head = $lines[0];
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chomp $head;
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shift @lines;
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last if ($head eq 'SUPPORTED CPUNK (TYPE I) REMAILERS');
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};
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while (@lines) {
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my $head = $lines[0];
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chomp $head;
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shift @lines;
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last unless ($head =~ /<(.*?@.*?)>/);
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Echolot::Globals::get()->{'storage'}->add_prospective_address($1, 'reliable-caps-reply-type1', $remailer_address);
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};
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while (@lines) {
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my $head = $lines[0];
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chomp $head;
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shift @lines;
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last if ($head eq 'SUPPORTED MIXMASTER (TYPE II) REMAILERS');
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};
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while (@lines) {
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my $head = $lines[0];
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chomp $head;
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last unless ($head =~ /\s(.*?@.*?)\s/);
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shift @lines;
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Echolot::Globals::get()->{'storage'}->add_prospective_address($1, 'reliable-caps-reply-type2', $remailer_address);
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};
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return 1;
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};
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sub remailer_conf($$$) {
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my ($reply, $token, $time) = @_;
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my ($id) = $token =~ /^conf\.(\d+)$/;
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(defined $id) or
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cluck ("Returned token '$token' has no id at all"),
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return 0;
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Echolot::Globals::get()->{'storage'}->not_a_remailer($id), return 1
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if (is_not_a_remailer($reply));
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Echolot::Thesaurus::save_thesaurus('conf', $id, $reply);
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remailer_caps($reply, $token, $time);
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};
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sub set_caps_manually($$) {
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my ($addr, $caps) = @_;
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defined $addr or
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cluck("Address not defined."),
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return 0;
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defined $caps or
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cluck("Caps not defined."),
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return 0;
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print "Setting caps for $addr manually to $caps\n"
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if Echolot::Config::get()->{'verbose'};
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my $remailer = Echolot::Globals::get()->{'storage'}->get_address($addr);
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defined $remailer or
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cluck("Remailer address $addr did not give a valid remailer."),
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return 0;
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my $id = $remailer->{'id'};
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defined $id or
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cluck("Remailer address $addr did not give a remailer with an id."),
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return 0;
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my $token = 'conf.'.$id;
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my $conf = "Remailer-Type: set-manually\n$caps";
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remailer_caps($conf, $token, time, 1);
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return 1;
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};
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sub parse_mix_key($$$) {
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my ($reply, $time, $remailer) = @_;
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# -----Begin Mix Key-----
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# 7f6d997678b19ccac110f6e669143126
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# 258
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# AASyedeKiP1/UKyfrBz2K6gIhv4jfXIaHo8dGmwD
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# KqkG3DwytgSySSY3wYm0foT7KvEnkG2aTi/uJva/
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# gymE+tsuM8l8iY1FOiXwHWLDdyUBPbrLjRkgm7GD
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# Y7ogSjPhVLeMpzkSyO/ryeUfLZskBUBL0LxjLInB
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# YBR3o6p/RiT0EQAAAAAAAAAAAAAAAAAAAAAAAAAA
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# AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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# AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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# AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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# AAAAAAAAAAAAAAAAAAAAAQAB
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# -----End Mix Key-----
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my %mixmasters;
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# rot26 rot26@mix.uucico.de 7f6d997678b19ccac110f6e669143126 2.9b33 MC
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my @mix_confs = ($reply =~ /^[a-z0-9]+ \s+ \S+\@\S+ \s+ [0-9a-f]{32} (?:\s+ \S+ (?:[ \t]+ \S+)?)?/xmg);
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my @mix_keys = ($reply =~ /^-----Begin \s Mix \s Key-----\r?\n
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[0-9a-f]{32}\r?\n
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\d+\r?\n
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(?:[a-zA-Z0-9+\/]*\r?\n)+
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-----End \s Mix \s Key-----$/xmg );
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for (@mix_confs) {
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my ($nick, $address, $keyid, $version, $caps) = /^([a-z0-9]+) \s+ (\S+@\S+) \s+ ([0-9a-f]{32}) (?:(\S+) (?:[\t]+ (\S+)))?/x;
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$mixmasters{$keyid} = {
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nick => $nick,
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address => $address,
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version => $version,
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caps => $caps,
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summary => $_
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};
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};
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for (@mix_keys) {
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my ($keyid) = /^-----Begin \s Mix \s Key-----\r?\n
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([0-9a-f]{32})\r?\n
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\d+\r?\n
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(?:[a-zA-Z0-9+\/]*\r?\n)+
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-----End \s Mix \s Key-----$/xmg;
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$mixmasters{$keyid}->{'key'} = $_;
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};
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for my $keyid (keys %mixmasters) {
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my $remailer_address = $mixmasters{$keyid}->{'address'};
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(defined $mixmasters{$keyid}->{'nick'} && ! defined $mixmasters{$keyid}->{'key'}) and
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cluck("Mixmaster key header without key in reply from $remailer_address"),
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next;
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(! defined $mixmasters{$keyid}->{'nick'} && defined $mixmasters{$keyid}->{'key'}) and
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cluck("Mixmaster key without key header in reply from $remailer_address"),
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next;
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if ($remailer->{'address'} ne $remailer_address) {
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# Address mismatch -> Ignore reply and add $remailer_address to prospective addresses
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cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address. Adding latter to prospective remailers.");
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Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-key', $remailer_address);
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} else {
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Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} );
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Echolot::Globals::get()->{'storage'}->set_key(
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'mix',
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$mixmasters{$keyid}->{'nick'},
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$mixmasters{$keyid}->{'address'},
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$mixmasters{$keyid}->{'key'},
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$keyid,
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$mixmasters{$keyid}->{'version'},
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$mixmasters{$keyid}->{'caps'},
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$mixmasters{$keyid}->{'summary'},
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$time);
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}
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};
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return 1;
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};
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sub parse_cpunk_key($$$) {
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my ($reply, $time, $remailer) = @_;
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my $GnuPG = new GnuPG::Interface;
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$GnuPG->call( Echolot::Config::get()->{'gnupg'} ) if (Echolot::Config::get()->{'gnupg'});
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$GnuPG->options->hash_init(
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homedir => Echolot::Config::get()->{'gnupghome'} );
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$GnuPG->options->meta_interactive( 0 );
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my %cypherpunk;
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my @pgp_keys = ($reply =~ /^-----BEGIN \s PGP \s PUBLIC \s KEY \s BLOCK-----\r?\n
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(?:.+\r?\n)*
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\r?\n
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(?:[a-zA-Z0-9+\/=]*\r?\n)+
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-----END \s PGP \s PUBLIC \s KEY \s BLOCK-----$/xmg );
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for my $key (@pgp_keys) {
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my ( $stdin_fh, $stdout_fh, $stderr_fh, $status_fh )
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= ( IO::Handle->new(),
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IO::Handle->new(),
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IO::Handle->new(),
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IO::Handle->new(),
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);
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my $handles = GnuPG::Handles->new (
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stdin => $stdin_fh,
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stdout => $stdout_fh,
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stderr => $stderr_fh,
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status => $status_fh
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);
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my $pid = $GnuPG->wrap_call(
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commands => [qw{--with-colons}],
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command_args => [qw{--no-options --no-default-keyring --fast-list-mode}],
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handles => $handles );
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print $stdin_fh $key;
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close($stdin_fh);
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my $stdout = join '', <$stdout_fh>; close($stdout_fh);
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my $stderr = join '', <$stderr_fh>; close($stderr_fh);
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my $status = join '', <$status_fh>; close($status_fh);
|
| 345 |
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| 346 |
waitpid $pid, 0;
|
| 347 |
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| 348 |
($stderr eq '') or
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| 349 |
cluck("GnuPG returned something in stderr: '$stderr' when checking key '$key'; So what?\n");
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($status eq '') or
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cluck("GnuPG returned something in status '$status' when checking key '$key': So what?\n");
|
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my @included_keys = $stdout =~ /^pub:.*$/mg;
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(scalar @included_keys >= 2) &&
|
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cluck ("Cannot handle more than one key per block correctly yet. Found ".(scalar @included_keys)." in one block from ".$remailer->{'address'});
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for my $included_key (@included_keys) {
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my ($type, $keyid, $uid) = $included_key =~ /pub::\d+:(\d+):([0-9A-F]+):[^:]+:[^:]*:::([^:]+):/;
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(defined $uid) or
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cluck ("Unexpected format of '$included_key' by ".$remailer->{'address'}."; Skipping"),
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next;
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my ($address) = $uid =~ /<(.*?)>/;
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$cypherpunk{$keyid} = {
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address => $address,
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type => $type,
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key => $key # FIXME handle more than one key per block correctly
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};
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};
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};
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for my $keyid (keys %cypherpunk) {
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my $remailer_address = $cypherpunk{$keyid}->{'address'};
|
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if ($remailer->{'address'} ne $remailer_address) {
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# Address mismatch -> Ignore reply and add $remailer_address to prospective addresses
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cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address id key $keyid. Adding latter to prospective remailers.");
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Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-key', $remailer_address);
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} else {
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Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} );
|
| 379 |
# 1 .. RSA
|
| 380 |
# 17 .. DSA
|
| 381 |
if ($cypherpunk{$keyid}->{'type'} == 1 || $cypherpunk{$keyid}->{'type'} == 17 ) {
|
| 382 |
Echolot::Globals::get()->{'storage'}->set_key(
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| 383 |
(($cypherpunk{$keyid}->{'type'} == 1) ? 'cpunk-rsa' :
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| 384 |
(($cypherpunk{$keyid}->{'type'} == 17) ? 'cpunk-dsa' :
|
| 385 |
'ERROR')),
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| 386 |
$keyid, # as nick
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| 387 |
$cypherpunk{$keyid}->{'address'},
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| 388 |
$cypherpunk{$keyid}->{'key'},
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| 389 |
$keyid,
|
| 390 |
'N/A',
|
| 391 |
'N/A',
|
| 392 |
'N/A',
|
| 393 |
$time);
|
| 394 |
} else {
|
| 395 |
cluck("$keyid from $remailer_address has algoid ".$cypherpunk{$keyid}->{'type'}.". Cannot handle those.");
|
| 396 |
};
|
| 397 |
}
|
| 398 |
};
|
| 399 |
|
| 400 |
return 1;
|
| 401 |
};
|
| 402 |
|
| 403 |
sub remailer_key($$$) {
|
| 404 |
my ($reply, $token, $time) = @_;
|
| 405 |
|
| 406 |
my $cp_reply = $reply;
|
| 407 |
$cp_reply =~ s/^- -/-/gm; # PGP Signed messages
|
| 408 |
|
| 409 |
my ($id) = $token =~ /^key\.(\d+)$/;
|
| 410 |
(defined $id) or
|
| 411 |
cluck ("Returned token '$token' has no id at all"),
|
| 412 |
return 0;
|
| 413 |
|
| 414 |
Echolot::Globals::get()->{'storage'}->not_a_remailer($id), return 1
|
| 415 |
if (is_not_a_remailer($reply));
|
| 416 |
Echolot::Thesaurus::save_thesaurus('key', $id, $reply);
|
| 417 |
|
| 418 |
my $remailer = Echolot::Globals::get()->{'storage'}->get_address_by_id($id);
|
| 419 |
cluck("No remailer found for id '$id'"), return 0 unless defined $remailer;
|
| 420 |
|
| 421 |
parse_mix_key($cp_reply, $time, $remailer);
|
| 422 |
parse_cpunk_key($cp_reply, $time, $remailer);
|
| 423 |
|
| 424 |
return 1;
|
| 425 |
};
|
| 426 |
|
| 427 |
sub remailer_stats($$$) {
|
| 428 |
my ($reply, $token, $time) = @_;
|
| 429 |
|
| 430 |
my ($id) = $token =~ /^stats\.(\d+)$/;
|
| 431 |
(defined $id) or
|
| 432 |
cluck ("Returned token '$token' has no id at all"),
|
| 433 |
return 0;
|
| 434 |
|
| 435 |
Echolot::Globals::get()->{'storage'}->not_a_remailer($id), return 1
|
| 436 |
if (is_not_a_remailer($reply));
|
| 437 |
Echolot::Thesaurus::save_thesaurus('stats', $id, $reply);
|
| 438 |
};
|
| 439 |
|
| 440 |
sub remailer_help($$$) {
|
| 441 |
my ($reply, $token, $time) = @_;
|
| 442 |
|
| 443 |
my ($id) = $token =~ /^help\.(\d+)$/;
|
| 444 |
(defined $id) or
|
| 445 |
cluck ("Returned token '$token' has no id at all"),
|
| 446 |
return 0;
|
| 447 |
|
| 448 |
Echolot::Globals::get()->{'storage'}->not_a_remailer($id), return 1
|
| 449 |
if (is_not_a_remailer($reply));
|
| 450 |
Echolot::Thesaurus::save_thesaurus('help', $id, $reply);
|
| 451 |
};
|
| 452 |
|
| 453 |
sub remailer_adminkey($$$) {
|
| 454 |
my ($reply, $token, $time) = @_;
|
| 455 |
|
| 456 |
my ($id) = $token =~ /^adminkey\.(\d+)$/;
|
| 457 |
(defined $id) or
|
| 458 |
cluck ("Returned token '$token' has no id at all"),
|
| 459 |
return 0;
|
| 460 |
|
| 461 |
Echolot::Globals::get()->{'storage'}->not_a_remailer($id), return 1
|
| 462 |
if (is_not_a_remailer($reply));
|
| 463 |
Echolot::Thesaurus::save_thesaurus('adminkey', $id, $reply);
|
| 464 |
};
|
| 465 |
|
| 466 |
1;
|
| 467 |
# vim: set ts=4 shiftwidth=4:
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