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hashcat/tools/test_modules/m12200.pm

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#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Digest::SHA qw (sha512);
sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $default_salt = shift // 0;
my $iterations = 65536;
if ($default_salt == 1)
{
$salt = "0011223344556677";
}
my $digest = sha512 (pack ("H*", $salt) . $word);
for (my $i = 0; $i < $iterations; $i++)
{
$digest = sha512 ($digest);
}
$digest = unpack ("H*", $digest);
$digest = substr ($digest, 0, 16);
my $hash;
if ($default_salt == 0)
{
$hash = sprintf ("\$ecryptfs\$0\$1\$%s\$%s", $salt, $digest);
}
else
{
$hash = sprintf ("\$ecryptfs\$0\$%s", $digest);
}
return $hash;
}
sub module_verify_hash
{
my $line = shift;
my ($hash_in, $word) = split (/:/, $line);
return unless defined $hash_in;
return unless defined $word;
my $signature = substr ($hash_in, 0, 12);
return unless ($signature eq '$ecryptfs$0$');
my $digest = substr ($hash_in, 12);
my $default_salt = 1;
my ($param, $hash) = split('\$', $digest);
$default_salt = 0 if ($param eq '1');
my $salt;
if ($default_salt == 0)
{
($salt, $hash) = split('\$', $hash);
}
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt, $default_salt);
return ($new_hash, $word);
}
1;