mirror of
https://github.com/hashcat/hashcat.git
synced 2024-12-28 01:18:35 +00:00
104 lines
2.0 KiB
Perl
104 lines
2.0 KiB
Perl
#!/usr/bin/env perl
|
|
|
|
##
|
|
## Author......: See docs/credits.txt
|
|
## License.....: MIT
|
|
##
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Digest::SHA qw (hmac_sha1);
|
|
use Crypt::Mode::CBC;
|
|
use Crypt::PBKDF2;
|
|
|
|
sub byte2hex
|
|
{
|
|
my $input = shift;
|
|
return unpack ("H*", $input);
|
|
}
|
|
|
|
sub hex2byte
|
|
{
|
|
my $input = shift;
|
|
return pack ("H*", $input);
|
|
}
|
|
|
|
sub pad
|
|
{
|
|
my $n = shift;
|
|
my $size = shift;
|
|
|
|
return (~$n + 1) & ($size - 1);
|
|
}
|
|
|
|
sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
|
|
|
|
sub module_generate_hash
|
|
{
|
|
my $word = shift;
|
|
my $salt = shift;
|
|
my $user = shift // "user";
|
|
my $realm = shift // "realm";
|
|
|
|
my $mysalt = uc $realm;
|
|
$mysalt = $mysalt . $user;
|
|
|
|
# first we generate the 'seed'
|
|
my $iter = 4096;
|
|
my $pbkdf2 = Crypt::PBKDF2->new
|
|
(
|
|
hash_class => 'HMACSHA1',
|
|
iterations => $iter,
|
|
output_len => 16
|
|
);
|
|
|
|
my $b_seed = $pbkdf2->PBKDF2 ($mysalt, $word);
|
|
|
|
# we can precompute this
|
|
my $b_kerberos_nfolded = hex2byte ('6b65726265726f737b9b5b2b93132b93');
|
|
|
|
my $b_iv = hex2byte ('0' x 32);
|
|
|
|
# 'key_bytes' will be the AES key used to generate 'ki' (for final hmac-sha1)
|
|
# and 'ke' (AES key to decrypt/encrypt the ticket)
|
|
my $cbc = Crypt::Mode::CBC->new ('AES', 0);
|
|
my $b_key_bytes = $cbc->encrypt ($b_kerberos_nfolded, $b_seed, $b_iv);
|
|
|
|
my $tmp_hash = sprintf ('$krb5db$17$%s$%s$%s', $user, $realm, unpack ("H*", $b_key_bytes));
|
|
|
|
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 == 5;
|
|
|
|
shift @data;
|
|
|
|
my $signature = shift @data;
|
|
my $algorithm = shift @data;
|
|
my $user = shift @data;
|
|
my $realm = shift @data;
|
|
|
|
return unless ($signature eq "krb5db");
|
|
return unless ($algorithm eq "17");
|
|
|
|
my $word_packed = pack_if_HEX_notation ($word);
|
|
|
|
my $new_hash = module_generate_hash ($word_packed, undef, $user, $realm);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|