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72 lines
1.3 KiB
Perl
72 lines
1.3 KiB
Perl
#!/usr/bin/env perl
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##
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## Author......: See docs/credits.txt
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## License.....: MIT
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##
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use strict;
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use warnings;
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use Digest::SHA;
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sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
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sub module_generate_hash
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{
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my $word = shift;
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my $salt = shift;
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my $sha512 = Digest::SHA->new(512);
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$sha512->add ($salt . $word);
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for (my $i = 1; $i < 1000; $i++)
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{
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my $tmp = $sha512->digest;
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$sha512->reset;
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$sha512->add ($tmp);
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}
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my $digest = $sha512->digest;
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my $hash = sprintf ('$sspr$4$1000$%s$%s', $salt, unpack ("H*", $digest));
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return $hash;
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}
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sub module_verify_hash
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{
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my $line = shift;
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my $idx = index ($line, ':');
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return unless $idx >= 0;
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my $hash = substr ($line, 0, $idx);
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my $word = substr ($line, $idx + 1);
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return unless substr ($hash, 0, 13) eq '$sspr$4$1000$';
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my (undef, $signature, $version, $iter, $salt) = split '\$', $hash;
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return unless defined $signature;
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return unless defined $version;
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return unless defined $iter;
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return unless defined $salt;
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return unless $version == 4;
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return unless $iter == 1000;
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return unless length $salt == 16;
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $salt);
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return ($new_hash, $word);
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}
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1;
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