mirror of
https://github.com/hashcat/hashcat.git
synced 2024-11-16 13:05:28 +00:00
123 lines
3.3 KiB
Perl
123 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_principal_name = shift // "user\@domain.com";
|
|
my $checksum = shift;
|
|
my $edata2 = shift;
|
|
|
|
my $k = md4 (encode ("UTF-16LE", $word));
|
|
|
|
my $k1 = hmac_md5 ("\x08\x00\x00\x00", $k);
|
|
|
|
my $cleartext_ticket = '7981df3081dca01b3019a003020117a112041071e026814da2' .
|
|
'3f129f0e67a01b73f79aa11c301a3018a003020100a111180f32303138313033303039353' .
|
|
'831365aa206020460fdc6caa311180f32303337303931343032343830355aa40703050050' .
|
|
'c10000a511180f32303138313033303039353831365aa611180f323031383130333030393' .
|
|
'53831365aa711180f32303138313033303139353831365aa811180f323031383130333131' .
|
|
'30303433385aa90d1b0b545952454c4c2e434f5250aa20301ea003020101a11730151b066' .
|
|
'b72627467741b0b545952454c4c2e434f5250';
|
|
|
|
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 "7981" && substr ($ticket_decrypt, 22, 2) eq "30")) ||
|
|
((substr ($ticket_decrypt, 16, 2) eq "79") && (substr ($ticket_decrypt, 20, 2) eq "30")) ||
|
|
((substr ($ticket_decrypt, 16, 4) eq "7982") && (substr ($ticket_decrypt, 24, 2) eq "30"));
|
|
|
|
if ($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 $tmp_hash = sprintf ('$krb5asrep$23$%s:%s$%s', $user_principal_name, unpack ("H*", $checksum), unpack ("H*", $edata2));
|
|
|
|
return $tmp_hash;
|
|
}
|
|
|
|
sub module_verify_hash
|
|
{
|
|
my $line = shift;
|
|
|
|
my ($hash, $hash2, $word) = split (':', $line);
|
|
|
|
return unless defined $hash;
|
|
return unless defined $hash2;
|
|
return unless defined $word;
|
|
|
|
my @data = split ('\$', $hash);
|
|
|
|
return unless scalar @data == 4;
|
|
|
|
shift @data;
|
|
|
|
my $signature = shift @data;
|
|
my $algorithm = shift @data;
|
|
my $user_principal_name = shift @data;
|
|
|
|
return unless ($signature eq "krb5asrep");
|
|
|
|
my @data2 = split ('\$', $hash2);
|
|
|
|
my $checksum = shift @data2;
|
|
my $edata2 = shift @data2;
|
|
|
|
return unless (length ($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_principal_name, $checksum, $edata2);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|