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59 lines
836 B
Perl
59 lines
836 B
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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sub module_constraints { [[0, 256], [-1, -1], [0, 55], [-1, -1], [-1, -1]] }
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sub hashCode
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{
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use integer;
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my $word = shift;
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my @chars = unpack ("C*", $word);
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my $hash = 0;
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while (my $c = shift @chars)
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{
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$hash = ($hash * 31) + $c;
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}
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return $hash & 0xffffffff;
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}
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sub module_generate_hash
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{
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my $word = shift;
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my $digest = hashCode ($word);
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my $hash = sprintf ("%08x", $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 $line = shift;
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my ($hash, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $word;
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed);
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return ($new_hash, $word);
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}
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1;
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