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52 lines
941 B
Perl
52 lines
941 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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use Digest::MurmurHash3 qw (murmur32);
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sub module_constraints { [[-1, -1], [-1, -1], [0, 31], [8, 8], [-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 $seed = unpack ("I>", pack ("H*", $salt));
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my $digest = murmur32 ($word, $seed);
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$digest = unpack ("H*", pack ("I>", $digest));
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my $hash = sprintf ("%s:%s", $digest, $salt);
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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, $seed, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $seed;
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return unless defined $word;
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return unless ($hash =~ m/^[0-9a-fA-F]{8}$/);
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return unless ($seed =~ m/^[0-9a-fA-F]{8}$/);
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $seed);
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return ($new_hash, $word);
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}
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1;
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