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hashcat/tools/test_modules/m15700.pm

69 lines
1.6 KiB
Perl

#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Crypt::ScryptKDF qw (scrypt_raw);
use Digest::Keccak qw (keccak_256_hex);
sub module_constraints { [[0, 256], [32, 32], [-1, -1], [-1, -1], [-1, -1]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $scrypt_N = shift || 1024 ; # 262144 originally
my $scrypt_r = shift || 1; # 8 originally
my $scrypt_p = shift || 1;
my $ciphertext = shift || random_bytes (32);
my $derived_key = scrypt_raw ($word, $salt, $scrypt_N, $scrypt_r, $scrypt_p, 32);
my $derived_key_cropped = substr ($derived_key, 16, 16);
my $digest = keccak_256_hex ($derived_key_cropped . $ciphertext);
my $hash = sprintf ("\$ethereum\$s*%i*%i*%i*%s*%s*%s", $scrypt_N, $scrypt_r, $scrypt_p, unpack ("H*", $salt), unpack ("H*", $ciphertext), $digest);
return $hash;
}
sub module_verify_hash
{
my $line = shift;
my ($hash, $word) = split (':', $line);
return unless defined $hash;
return unless defined $word;
my $signature = substr ($hash, 0, 12);
return unless ($signature eq "\$ethereum\$s\*");
my @data = split ('\*', $hash);
return unless scalar (@data) == 7;
shift @data;
my $scrypt_N = shift @data;
my $scrypt_r = shift @data;
my $scrypt_p = shift @data;
my $salt = pack ("H*", shift @data);
my $ciphertext = pack ("H*", shift @data);
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt, $scrypt_N, $scrypt_r, $scrypt_p, $ciphertext);
return ($new_hash, $word);
}
1;