mirror of
https://github.com/hashcat/hashcat.git
synced 2024-12-24 07:28:10 +00:00
126 lines
2.3 KiB
Perl
126 lines
2.3 KiB
Perl
#!/usr/bin/env perl
|
|
|
|
##
|
|
## Author......: See docs/credits.txt
|
|
## License.....: MIT
|
|
##
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Digest::SHA qw (sha256);
|
|
use Crypt::CBC;
|
|
|
|
sub module_constraints { [[0, 56], [8, 8], [-1, -1], [-1, -1], [-1, -1]] }
|
|
|
|
my $BUF_SIZE = 0x10000;
|
|
|
|
sub module_generate_hash
|
|
{
|
|
my $word = shift;
|
|
my $salt = shift;
|
|
my $data = shift;
|
|
|
|
my $comb = $salt . $word;
|
|
my $len = length ($comb);
|
|
|
|
my $buf = "";
|
|
|
|
for (my $i = 0; $i < $BUF_SIZE; $i += $len)
|
|
{
|
|
$buf .= $comb;
|
|
}
|
|
|
|
# IMPORTANT: we need to truncate the buffer to $BUF_SIZE:
|
|
|
|
$buf = substr ($buf, 0, $BUF_SIZE);
|
|
|
|
my $key = sha256 ($buf);
|
|
|
|
my $aes = Crypt::CBC->new ({
|
|
cipher => "Crypt::Rijndael",
|
|
key => $key,
|
|
iv => "\x00" x 16,
|
|
keysize => 32,
|
|
literal_key => 1,
|
|
header => "none",
|
|
padding => "none"
|
|
});
|
|
|
|
if (defined ($data)) # decrypt
|
|
{
|
|
my $plain_text = $aes->decrypt ($data);
|
|
|
|
my $part1 = substr ($plain_text, 0, 64);
|
|
my $part2 = substr ($plain_text, 64, 32);
|
|
|
|
my $hash = sha256 ($part1);
|
|
|
|
if ($hash ne $part2) # wrong => fake the data
|
|
{
|
|
$data = "\x00" x length ($data); # 64 + 32 = 96
|
|
}
|
|
}
|
|
else # encrypt
|
|
{
|
|
$data = random_bytes (64);
|
|
|
|
my $hash = sha256 ($data);
|
|
|
|
$data = $aes->encrypt ($data . $hash);
|
|
}
|
|
|
|
return sprintf ("\$bcve\$3\$08\$%s\$%s", unpack ("H*", $salt), unpack ("H*", $data));
|
|
}
|
|
|
|
sub module_verify_hash
|
|
{
|
|
my $line = shift;
|
|
|
|
my $idx1 = index ($line, ':');
|
|
|
|
return if ($idx1 < 1);
|
|
|
|
my $hash = substr ($line, 0, $idx1);
|
|
my $word = substr ($line, $idx1 + 1);
|
|
|
|
return if (substr ($hash, 0, 8) ne "\$bcve\$3\$");
|
|
|
|
$idx1 = index ($hash, '$', 8);
|
|
|
|
return if ($idx1 < 1);
|
|
|
|
# crypto type
|
|
|
|
my $crypto_type = substr ($hash, 8, $idx1 - 8);
|
|
|
|
return unless ($crypto_type eq "08");
|
|
|
|
# salt
|
|
|
|
my $idx2 = index ($hash, '$', $idx1 + 1);
|
|
|
|
my $salt = substr ($hash, $idx1 + 1, $idx2 - $idx1 - 1);
|
|
|
|
return unless ($salt =~ m/^[0-9a-fA-F]+$/);
|
|
|
|
# data
|
|
|
|
my $data = substr ($hash, $idx2 + 1);
|
|
|
|
return unless ($data =~ m/^[0-9a-fA-F]+$/);
|
|
|
|
# convert to hex:
|
|
|
|
$salt = pack ("H*", $salt);
|
|
$data = pack ("H*", $data);
|
|
|
|
my $word_packed = pack_if_HEX_notation ($word);
|
|
|
|
my $new_hash = module_generate_hash ($word_packed, $salt, $data);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|