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hashcat/tools/test_modules/m28600.pm
2022-06-29 17:53:33 +02:00

79 lines
1.7 KiB
Perl

#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use MIME::Base64 qw (decode_base64 encode_base64);
use Digest::SHA qw (sha256);
use Digest::HMAC qw (hmac);
use Crypt::PBKDF2;
sub module_constraints { [[0, 256], [28, 28], [-1, -1], [-1, -1], [-1, -1]] }
my $ITERATIONS = 4096;
my $HMAC_SALT = "Server Key";
my $HMAC_SALT_2 = "Client Key";
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $iter = shift // $ITERATIONS;
my $pbkdf = Crypt::PBKDF2->new
(
hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
iterations => $iter,
output_len => 32
);
my $pbkdf2_dgst = $pbkdf->PBKDF2 ($salt, $word);
my $server_key = hmac ($HMAC_SALT, $pbkdf2_dgst, \&sha256);
my $stored_key = sha256 (hmac ($HMAC_SALT_2, $pbkdf2_dgst, \&sha256));
my $hash = sprintf ('SCRAM-SHA-256$%i:%s$%s:%s', $iter, encode_base64 ($salt, ""), encode_base64 ($stored_key, ""), encode_base64 ($server_key, ""));
return $hash;
}
sub module_verify_hash
{
my $line = shift;
my $idx = rindex ($line, ':');
return unless $idx >= 0;
my $hash = substr ($line, 0, $idx);
my $word = substr ($line, $idx + 1);
return unless substr ($hash, 0, 13) eq 'SCRAM-SHA-256';
my (undef, $iter, $salt) = split (':|\$', $hash);
return unless defined ($iter);
return unless defined ($salt);
return unless ($iter =~ m/^[1-9][0-9]{0,7}$/);
$iter = int ($iter);
return unless ($salt =~ m/^[A-Za-z0-9+\/=]{0,88}$/);
$salt = decode_base64 ($salt);
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt, $iter);
return ($new_hash, $word);
}
1;