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58 lines
923 B
Perl
58 lines
923 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::CRC;
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sub module_constraints { [[0, 256], [8, 8], [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 $iv = hex ($salt);
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my $ctx = Digest::CRC->new
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(
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width => 32,
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init => $iv,
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xorout => 0xffffffff,
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refout => 1,
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poly => 0x04c11db7,
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refin => 1,
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cont => 1
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);
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$ctx->add ($word);
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my $hash = sprintf ("%s:%s", $ctx->hexdigest (), $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, $salt, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $salt;
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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, $salt);
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return ($new_hash, $word);
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}
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1;
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