mirror of
https://github.com/hashcat/hashcat.git
synced 2024-11-22 16:18:09 +00:00
102 lines
2.2 KiB
Perl
102 lines
2.2 KiB
Perl
#!/usr/bin/env perl
|
|
|
|
##
|
|
## Author......: See docs/credits.txt
|
|
## License.....: MIT
|
|
##
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Digest::SHA qw (sha256_hex);
|
|
use Crypt::CBC;
|
|
|
|
sub module_constraints { [[0, 256], [-1, -1], [0, 55], [-1, -1], [-1, -1]] }
|
|
|
|
sub calculate_padding
|
|
{
|
|
my $length = shift;
|
|
my $blocksize = shift // 32;
|
|
my $minpadding = shift // 16;
|
|
|
|
my $padded_len=$length+$minpadding;
|
|
my $finalpadded=( ( $padded_len - 1 ) | ( $blocksize - 1 ) ) + 1;
|
|
|
|
return $finalpadded - $length;
|
|
|
|
}
|
|
|
|
sub module_generate_hash
|
|
{
|
|
my $word = shift;
|
|
my $total_len = (length($word)*2) + 8 + 64;
|
|
my $padding = shift // random_hex_string (calculate_padding($total_len));
|
|
|
|
if (length $padding == 0){
|
|
$padding=random_hex_string (calculate_padding($total_len));
|
|
}
|
|
|
|
|
|
my $digest = sha256_hex ($word);
|
|
my $len = sprintf("%02d",length($word));
|
|
my $paddedlen = sprintf("%02x000000", $len);
|
|
my $hexofword=unpack "H*",$word;
|
|
my $plaintext = $paddedlen . $hexofword . $digest . $padding;
|
|
|
|
|
|
my $aes = Crypt::CBC->new ({
|
|
key => pack ("H*", $digest),
|
|
cipher => "Crypt::Rijndael",
|
|
iv => => "\x00" x 16,
|
|
literal_key => 1,
|
|
header => "none",
|
|
keysize => 32,
|
|
padding => "none",
|
|
});
|
|
|
|
my $ciphertext=$aes->encrypt(pack("H*",$plaintext));
|
|
my $hash = sprintf("S:\"Config Passphrase\"=02:%s",unpack ("H*",$ciphertext));
|
|
|
|
return $hash
|
|
}
|
|
|
|
sub get_aes
|
|
{
|
|
my $word_packed=shift;
|
|
my $key = sha256_hex ($word_packed);
|
|
|
|
my $aes = Crypt::CBC->new ({
|
|
key => pack ("H*", $key),
|
|
cipher => "Crypt::Rijndael",
|
|
iv => => "\x00" x 16,
|
|
literal_key => 1,
|
|
header => "none",
|
|
keysize => 32,
|
|
padding => "none",
|
|
});
|
|
return $aes
|
|
}
|
|
|
|
sub module_verify_hash
|
|
{
|
|
my $line = shift;
|
|
|
|
my ($hash, $word) = $line=~ /S:.Config.Passphrase.=02:(.*):(.*)/;
|
|
|
|
return unless defined $hash;
|
|
return unless defined $word;
|
|
|
|
my $word_packed = pack_if_HEX_notation ($word);
|
|
my $decrypted = get_aes($word_packed)->decrypt(pack"H*", $hash);
|
|
my $plaintext_hex=unpack "H*",$decrypted;
|
|
my $passlen=hex(substr($plaintext_hex,0,2));
|
|
my $padding = substr($plaintext_hex,8+2*$passlen+64);
|
|
|
|
|
|
my $new_hash = module_generate_hash ($word_packed,$padding);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|