mirror of
https://github.com/hashcat/hashcat.git
synced 2024-11-27 02:18:21 +00:00
146 lines
3.5 KiB
Perl
146 lines
3.5 KiB
Perl
#!/usr/bin/env perl
|
|
|
|
##
|
|
## Author......: See docs/credits.txt
|
|
## License.....: MIT
|
|
##
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Crypt::PBKDF2;
|
|
use Crypt::Mode::ECB;
|
|
|
|
sub module_constraints { [[0, 256], [64, 64], [-1, -1], [-1, -1], [-1, -1]] }
|
|
|
|
my $AXCRYPT_MAGIC = pack ("H*", "a6a6a6a6a6a6a6a6");
|
|
|
|
sub module_generate_hash
|
|
{
|
|
my $word = shift;
|
|
my $salt_wrap = shift;
|
|
my $iter_wrap = shift // 10000;
|
|
my $data = shift;
|
|
my $salt_kdf = shift // random_bytes (32);
|
|
my $iter_kdf = shift // 1000;
|
|
|
|
my $pbkdf2 = Crypt::PBKDF2->new
|
|
(
|
|
hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 512),
|
|
iterations => $iter_kdf,
|
|
output_len => 64
|
|
);
|
|
|
|
# most heavy part (PBKDF2-HMAC-SHA512):
|
|
|
|
my $KEK = $pbkdf2->PBKDF2 ($salt_kdf, $word);
|
|
|
|
# reduce 64 bytes of key to 16 bytes (why not just use 16 byte output length o.O ?)
|
|
|
|
$KEK = substr ($KEK, 0, 16) ^
|
|
substr ($KEK, 16, 16) ^
|
|
substr ($KEK, 32, 16) ^
|
|
substr ($KEK, 48, 16);
|
|
|
|
$KEK = $KEK ^ substr ($salt_wrap, 0, 16);
|
|
|
|
my $aes = Crypt::Mode::ECB->new ('AES', 0);
|
|
|
|
if (defined ($data)) # decrypt
|
|
{
|
|
# unwrap:
|
|
|
|
my $data_mod = $data;
|
|
|
|
for (my $j = $iter_wrap - 1; $j >= 0; $j--)
|
|
{
|
|
for (my $k = 4; $k >= 1; $k--)
|
|
{
|
|
my $idx = 4 * $j + $k;
|
|
|
|
my $block = substr ($data_mod, 0, 4) .
|
|
(substr ($data_mod, 4, 4) ^ pack ("L>", $idx)) .
|
|
substr ($data_mod, $k * 8, 8);
|
|
|
|
$block = $aes->decrypt ($block, $KEK);
|
|
|
|
substr ($data_mod, 0, 8) = substr ($block, 0, 8);
|
|
substr ($data_mod, $k * 8, 8) = substr ($block, 8, 8);
|
|
}
|
|
}
|
|
|
|
if (index ($data_mod, $AXCRYPT_MAGIC) != 0)
|
|
{
|
|
$data = "WRONG";
|
|
}
|
|
}
|
|
else # encrypt
|
|
{
|
|
# wrap:
|
|
|
|
$data = $AXCRYPT_MAGIC . random_bytes (136);
|
|
|
|
for (my $j = 0; $j < $iter_wrap; $j++)
|
|
{
|
|
for (my $k = 1; $k <= 4; $k++)
|
|
{
|
|
my $idx = 4 * $j + $k;
|
|
|
|
my $block = substr ($data, 0, 8) .
|
|
substr ($data, $k * 8, 8);
|
|
|
|
$block = $aes->encrypt ($block, $KEK);
|
|
|
|
substr ($block, 4, 4) ^= pack ("L>", $idx);
|
|
|
|
substr ($data, 0, 8) = substr ($block, 0, 8);
|
|
substr ($data, $k * 8, 8) = substr ($block, 8, 8);
|
|
}
|
|
}
|
|
}
|
|
|
|
my $hash = sprintf ("\$axcrypt\$*2*%i*%s*%s*%i*%s", $iter_wrap, unpack ("H*", $salt_wrap), unpack ("H*", $data), $iter_kdf, unpack ("H*", $salt_kdf));
|
|
|
|
return $hash;
|
|
}
|
|
|
|
sub module_verify_hash
|
|
{
|
|
my $line = shift;
|
|
|
|
my $idx = index ($line, ':');
|
|
|
|
return unless $idx >= 0;
|
|
|
|
my $hash = substr ($line, 0, $idx);
|
|
my $word = substr ($line, $idx + 1);
|
|
|
|
return unless substr ($hash, 0, 11) eq '$axcrypt$*2';
|
|
|
|
my (undef, undef, $iter_wrap, $salt_wrap, $data, $iter_kdf, $salt_kdf) = split ('\*', $hash);
|
|
|
|
return unless defined ($iter_wrap);
|
|
return unless defined ($salt_wrap);
|
|
return unless defined ($data);
|
|
return unless defined ($iter_kdf);
|
|
return unless defined ($salt_kdf);
|
|
|
|
return unless ($iter_wrap =~ m/^[0-9]{1,7}$/);
|
|
return unless ($salt_wrap =~ m/^[0-9a-fA-F]+$/);
|
|
return unless ($data =~ m/^[0-9a-fA-F]+$/);
|
|
return unless ($iter_kdf =~ m/^[0-9]{1,7}$/);
|
|
return unless ($salt_kdf =~ m/^[0-9a-fA-F]+$/);
|
|
|
|
$salt_wrap = pack ("H*", $salt_wrap);
|
|
$data = pack ("H*", $data);
|
|
$salt_kdf = pack ("H*", $salt_kdf);
|
|
|
|
my $word_packed = pack_if_HEX_notation ($word);
|
|
|
|
my $new_hash = module_generate_hash ($word_packed, $salt_wrap, $iter_wrap, $data, $salt_kdf, $iter_kdf);
|
|
|
|
return ($new_hash, $word);
|
|
}
|
|
|
|
1;
|