1#!/usr/bin/env perl
2
3##
4## Author......: See docs/credits.txt
5## License.....: MIT
6##
7
8use strict;
9use warnings;
10
11use Crypt::DES;
12
13sub module_constraints { [[8, 8], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
14
15sub module_generate_hash
16{
17  my $word = shift;
18  my $salt = shift;
19
20  my $cipher = new Crypt::DES ($word);
21
22  my $pt_bin = pack ("H*", $salt);
23
24  my $ct_bin = $cipher->encrypt ($pt_bin);
25
26  my $hash = sprintf ("%s:%s", unpack ("H*", $ct_bin), $salt);
27
28  return $hash;
29}
30
31sub module_verify_hash
32{
33  my $line = shift;
34
35  my ($hash, $salt, $word) = split (':', $line);
36
37  return unless defined $hash;
38  return unless defined $salt;
39  return unless defined $word;
40
41  my $word_packed = pack_if_HEX_notation ($word);
42
43  my $new_hash = module_generate_hash ($word_packed, $salt);
44
45  return ($new_hash, $word);
46}
47
481;
49