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48 lines
839 B
Perl
48 lines
839 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::SHA1 qw (sha1);
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use Digest::HMAC qw (hmac hmac_hex);
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use Encode qw (encode decode);
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use MIME::Base64;
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sub module_constraints { [[0, 256], [0, 256], [0, 27], [0, 27], [0, 27]] }
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sub module_generate_hash
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{
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my $word = shift;
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my $unicode_word = encode ("UTF-16LE", $word);
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my $digest = hmac ($unicode_word, $unicode_word, \&sha1, 64);
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my $hash = sprintf ("%s", encode_base64 ($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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