1#!/usr/bin/env perl
2
3##
4## Author......: See docs/credits.txt
5## License.....: MIT
6##
7
8use strict;
9use warnings;
10
11use Digest::MD5 qw (md5_hex);
12
13sub module_constraints { [[0, 256], [32, 32], [0, 55], [32, 32], [32, 55]] }
14
15sub module_generate_hash
16{
17  my $word = shift;
18  my $salt = shift;
19
20  my $digest = md5_hex ($word . $salt);
21
22  my $hash = sprintf ("%s:%s", $digest, $salt);
23
24  return $hash;
25}
26
27sub module_verify_hash
28{
29  my $line = shift;
30
31  my ($hash, $salt, $word) = split (':', $line);
32
33  return unless defined $hash;
34  return unless defined $salt;
35  return unless defined $word;
36
37  my $word_packed = pack_if_HEX_notation ($word);
38
39  my $new_hash = module_generate_hash ($word_packed, $salt);
40
41  return ($new_hash, $word);
42}
43
441;
45