1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
package Echolot::Pinger::CPunk;
# (c) 2002 Peter Palfrader <peter@palfrader.org>
# $Id: CPunk.pm,v 1.20 2003/06/06 10:36:23 weasel Exp $
#
=pod
=head1 Name
Echolot::Pinger::CPunk - send cypherpunk pings
=head1 DESCRIPTION
This package provides functions for sending cypherpunk (type I) pings.
=cut
use strict;
use English;
use GnuPG::Interface;
use IO::Handle;
use Echolot::Log;
sub encrypt_to($$$$) {
my ($msg, $recipient, $keys, $pgp2compat) = @_;
(defined $keys->{$recipient}) or
Echolot::Log::warn("Key for recipient $recipient is not defined."),
return undef;
(defined $keys->{$recipient}->{'key'}) or
Echolot::Log::warn("Key->key for recipient $recipient is not defined."),
return undef;
my $keyring = Echolot::Config::get()->{'tmpdir'}.'/'.
Echolot::Globals::get()->{'hostname'}.".".time.'.'.$PROCESS_ID.'_'.Echolot::Globals::get()->{'internalcounter'}++.'.keyring';
my $GnuPG = new GnuPG::Interface;
$GnuPG->call( Echolot::Config::get()->{'gnupg'} ) if (Echolot::Config::get()->{'gnupg'});
$GnuPG->options->hash_init(
homedir => Echolot::Config::get()->{'gnupghome'} );
$GnuPG->options->meta_interactive( 0 );
my ( $stdin_fh, $stdout_fh, $stderr_fh, $status_fh )
= ( IO::Handle->new(),
IO::Handle->new(),
IO::Handle->new(),
IO::Handle->new(),
);
my $handles = GnuPG::Handles->new (
stdin => $stdin_fh,
stdout => $stdout_fh,
stderr => $stderr_fh,
status => $status_fh
);
my $pid = $GnuPG->wrap_call(
commands => [ '--import' ],
command_args => [qw{--no-options --no-secmem-warning --no-default-keyring --fast-list-mode --keyring}, $keyring, '--', '-' ],
handles => $handles );
print $stdin_fh $keys->{$recipient}->{'key'};
close($stdin_fh);
my $stdout = join '', <$stdout_fh>; close($stdout_fh);
my $stderr = join '', <$stderr_fh>; close($stderr_fh);
my $status = join '', <$status_fh>; close($status_fh);
waitpid $pid, 0;
($stdout eq '') or
Echolot::Log::info("GnuPG returned something in stdout '$stdout' while adding key for '$recipient': So what?");
#($stderr eq '') or
#Echolot::Log::warn("GnuPG returned something in stderr: '$stderr' while adding key for '$recipient'; returning."),
#return undef;
($status =~ /^^\[GNUPG:\] IMPORTED $recipient /m) or
Echolot::Log::info("GnuPG status '$status' didn't indicate key for '$recipient' was imported correctly."),
return undef;
#$msg =~ s/\r?\n/\r\n/g;
$GnuPG->options->hash_init(
armor => 1 );
( $stdin_fh, $stdout_fh, $stderr_fh, $status_fh )
= ( IO::Handle->new(),
IO::Handle->new(),
IO::Handle->new(),
IO::Handle->new(),
);
$handles = GnuPG::Handles->new (
stdin => $stdin_fh,
stdout => $stdout_fh,
stderr => $stderr_fh,
status => $status_fh
);
my $command_args = [qw{--no-options --no-secmem-warning --always-trust --no-default-keyring --textmode --cipher-algo 3DES --keyring}, $keyring, '--recipient', $recipient];
my $plaintextfile;
#if ($pgp2compat) {
# push @$command_args, qw{--pgp2};
#};
# Files are required for compaitibility with PGP 2.*
# we also use files in all other cases since there is a bug in either GnuPG or GnuPG::Interface
# that let Echolot die if in certain cases:
# If a key is unuseable because it expired and we want to encrypt something to it
# pingd dies if there is only enough time between calling encrypt() and printing the message
# to GnuPG. (a sleep 1 triggered that reproduceably)
$plaintextfile = Echolot::Config::get()->{'tmpdir'}.'/'.
Echolot::Globals::get()->{'hostname'}.".".time.'.'.$PROCESS_ID.'_'.Echolot::Globals::get()->{'internalcounter'}++.'.plaintext';
open (F, '>'.$plaintextfile) or
Echolot::Log::warn("Cannot open $plaintextfile for writing: $!."),
return 0;
print (F $msg);
close (F) or
Echolot::Log::warn("Cannot close $plaintextfile."),
return 0;
push @$command_args, $plaintextfile;
$pid = $GnuPG->encrypt(
command_args => $command_args,
handles => $handles );
close($stdin_fh);
$stdout = join '', <$stdout_fh>; close($stdout_fh);
$stderr = join '', <$stderr_fh>; close($stderr_fh);
$status = join '', <$status_fh>; close($status_fh);
waitpid $pid, 0;
#($stderr eq '') or
#Echolot::Log::warn("GnuPG returned something in stderr: '$stderr' while encrypting to '$recipient'."),
#return undef;
($status =~ /^\[GNUPG:\] KEYEXPIRED (\d+)/m) and
Echolot::Log::info("Key $recipient expired at ".scalar gmtime($1)." UTC"),
return undef;
(($status =~ /^\[GNUPG:\] BEGIN_ENCRYPTION\s/m) &&
($status =~ /^\[GNUPG:\] END_ENCRYPTION\s/m)) or
Echolot::Log::info("GnuPG status '$status' didn't indicate message to '$recipient' was encrypted correctly (stderr: $stderr; args: ".join(' ', @$command_args).")."),
return undef;
unlink ($keyring) or
Echolot::Log::warn("Cannot unlink tmp keyring '$keyring'."),
return undef;
unlink ($keyring.'~'); # gnupg does those evil backups
(defined $plaintextfile) and
(unlink ($plaintextfile) or
Echolot::Log::warn("Cannot unlink tmp plaintextfile '$plaintextfile'."),
return undef);
my $result;
$plaintextfile .= '.asc';
open (F, '<'.$plaintextfile) or
Echolot::Log::warn("Cannot open $plaintextfile for reading: $!."),
return 0;
$result = join '', <F>;
close (F) or
Echolot::Log::warn("Cannot close $plaintextfile."),
return 0;
(defined $plaintextfile) and
(unlink ($plaintextfile) or
Echolot::Log::warn("Cannot unlink tmp plaintextfile '$plaintextfile'."),
return undef);
$result =~ s,^Version: .*$,Version: N/A,m;
#$result =~ s/\r?\n/\r\n/g;
return $result;
};
sub ping($$$$$) {
my ($body, $to, $with_from, $chain, $keys) = @_;
my $msg = $body;
for my $hop (reverse @$chain) {
my $header = '';
if ($with_from) {
my $address = Echolot::Config::get()->{'my_localpart'} . '@' .
Echolot::Config::get()->{'my_domain'};
$header = "##\nFrom: Echolot Pinger <$address>\n\n";
$with_from = 0;
};
# "Latent-Time: +0\n".
$msg = "::\n".
"Anon-To: $to\n".
"\n".
$header.
$msg;
if ($hop->{'encrypt'}) {
my $encrypted = encrypt_to($msg, $hop->{'keyid'}, $keys, $hop->{'pgp2compat'});
(defined $encrypted) or
Echolot::Log::debug("Encrypted is undefined."),
return undef;
$msg = "::\n".
"Encrypted: PGP\n".
"\n".
$encrypted;
};
$to = $hop->{'address'};
}
Echolot::Tools::send_message(
To => $to,
Body => $msg
);
return 1;
};
1;
# vim: set ts=4 shiftwidth=4:
|
