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53 lines
916 B
Perl
53 lines
916 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::SHA qw (sha1_hex);
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sub module_constraints { [[0, 235], [20, 20], [0, 35], [20, 20], [0, 55]] }
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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 $begin = "--" . $salt . "--";
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my $end = "--" . $word . "----";
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my $digest = sha1_hex ($begin . $end);
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for (my $round = 1; $round < 10; $round++)
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{
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$digest = sha1_hex ($begin . $digest . $end);
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}
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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, $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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