1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Digest::SHA qw (sha512_hex);
use MIME::Base64 qw (encode_base64 decode_base64);
sub module_constraints { [[0, 256], [0, 256], [0, 55], [0, 55], [0, 55]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $digest = sha512_hex ($word . $salt);
my $base64_buf = encode_base64 (pack ("H*", $digest) . $salt, "");
my $hash = sprintf ("{SSHA512}%s", $base64_buf);
return $hash;
}
sub module_verify_hash
{
my $line = shift;
my ($digest, $word) = split (':', $line);
return unless defined $digest;
return unless defined $word;
my $signature = substr ($digest, 0, 9);
my $plain_base64 = substr ($digest, 9);
return unless ($signature eq "{SSHA512}");
return unless defined $plain_base64;
my $decoded = decode_base64 ($plain_base64);
my $salt = substr ($decoded, 64);
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt);
return ($new_hash, $word);
}
1;
|
