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58 lines
1003 B
58 lines
1003 B
#!/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::MD5 qw (md5_hex);
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sub module_constraints { [[0, 256], [0, 221], [0, 55], [0, 22], [-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 $digest = md5_hex ($salt . "-" . md5_hex ($word));
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my $hash = sprintf ("\$B\$%s\$%s", $salt, $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 @data = split ('\$', $hash);
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return unless scalar @data == 4;
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shift @data;
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my $signature = shift @data;
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my $salt = shift @data;
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my $digest = shift @data;
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return unless defined $signature;
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return unless defined $salt;
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return unless defined $digest;
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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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