mirror of
https://github.com/hashcat/hashcat.git
synced 2024-12-27 17:08:12 +00:00
124 lines
3.3 KiB
Perl
124 lines
3.3 KiB
Perl
#!/usr/bin/env perl
|
|
|
|
##
|
|
## Author......: See docs/credits.txt
|
|
## License.....: MIT
|
|
##
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Encode;
|
|
use Crypt::RC4;
|
|
use Digest::HMAC_MD5 qw (hmac_md5);
|
|
use Digest::MD4 qw (md4);
|
|
use Digest::MD5 qw (md5_hex);
|
|
use POSIX qw (strftime);
|
|
|
|
sub module_constraints { [[0, 256], [16, 16], [0, 27], [16, 16], [-1, -1]] }
|
|
|
|
sub module_generate_hash
|
|
{
|
|
my $word = shift;
|
|
my $salt = shift;
|
|
my $user = shift // "user";
|
|
my $realm = shift // "realm";
|
|
my $spn = shift // "test/spn";
|
|
my $checksum = shift;
|
|
my $edata2 = shift;
|
|
|
|
my $k = md4 (encode ("UTF-16LE", $word));
|
|
|
|
my $k1 = hmac_md5 ("\x02\x00\x00\x00", $k);
|
|
|
|
my $cleartext_ticket = '6381b03081ada00703050050a00000a11b3019a003020117a1'.
|
|
'12041058e0d77776e8b8e03991f2966939222aa2171b154d594b5242544553542e434f4e5'.
|
|
'44f534f2e434f4da3133011a003020102a10a30081b067472616e6365a40b3009a0030201'.
|
|
'01a1020400a511180f32303136303231353134343735305aa611180f32303136303231353'.
|
|
'134343735305aa711180f32303136303231363030343735305aa811180f32303136303232'.
|
|
'323134343735305a';
|
|
|
|
if (defined $checksum)
|
|
{
|
|
$checksum = pack ("H*", $checksum);
|
|
}
|
|
else
|
|
{
|
|
my $nonce = unpack ("H*", random_bytes (8));
|
|
|
|
$cleartext_ticket = $nonce . $cleartext_ticket;
|
|
|
|
$checksum = hmac_md5 (pack ("H*", $cleartext_ticket), $k1);
|
|
}
|
|
|
|
my $k3 = hmac_md5 ($checksum, $k1);
|
|
|
|
if (defined $edata2)
|
|
{
|
|
my $cipher_decrypt = Crypt::RC4->new ($k3);
|
|
|
|
my $ticket_decrypt = unpack ("H*", $cipher_decrypt->RC4 (pack ("H*", $edata2)));
|
|
|
|
my $check_correct = ((substr ($ticket_decrypt, 16, 4) eq "6381" && substr ($ticket_decrypt, 22, 2) eq "30") ||
|
|
(substr ($ticket_decrypt, 16, 4) eq "6382")) &&
|
|
((substr ($ticket_decrypt, 32, 6) eq "030500") ||
|
|
(substr ($ticket_decrypt, 32, 8) eq "050307A0"));
|
|
|
|
if ($check_correct == 1)
|
|
{
|
|
$cleartext_ticket = $ticket_decrypt;
|
|
}
|
|
else # validation failed
|
|
{
|
|
# fake/wrong ticket (otherwise if we just decrypt/encrypt we end up with false positives all the time)
|
|
$cleartext_ticket = "0" x (length ($cleartext_ticket) + 16);
|
|
}
|
|
}
|
|
|
|
my $cipher = Crypt::RC4->new ($k3);
|
|
|
|
$edata2 = $cipher->RC4 (pack ("H*", $cleartext_ticket));
|
|
|
|
my $tmp_hash = sprintf ('$krb5tgs$23$*%s$%s$%s*$%s$%s', $user, $realm, $spn, unpack ("H*", $checksum), unpack ("H*", $edata2));
|
|
|
|
return $tmp_hash;
|
|
}
|
|
|
|
sub module_verify_hash
|
|
{
|
|
my $line = shift;
|
|
|
|
my ($hash, $word) = split (':', $line);
|
|
|
|
return unless defined $hash;
|
|
return unless defined $word;
|
|
|
|
my @data = split ('\$', $hash);
|
|
|
|
return unless scalar @data == 8;
|
|
|
|
shift @data;
|
|
|
|
my $signature = shift @data;
|
|
my $algorithm = shift @data;
|
|
my $user = shift @data;
|
|
$user = substr ($user, 1);
|
|
my $realm = shift @data;
|
|
my $spn = shift @data;
|
|
$spn = substr ($spn, 0, length ($spn) - 1);
|
|
my $checksum = shift @data;
|
|
my $edata2 = shift @data;
|
|
|
|
return unless ($signature eq "krb5tgs");
|
|
return unless (length ($checksum) == 32);
|
|
return unless (length ($edata2) >= 64);
|
|
|
|
my $word_packed = pack_if_HEX_notation ($word);
|
|
|
|
my $new_hash = module_generate_hash ($word_packed, undef, $user, $realm, $spn, $checksum, $edata2);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|