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75 lines
1.5 KiB
Perl
75 lines
1.5 KiB
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::MD4 qw (md4 md4_hex);
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use Crypt::PBKDF2;
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use Encode;
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sub module_constraints { [[0, 127], [0, 239], [0, 27], [0, 39], [-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 $iterations = shift // 10240;
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my $salt_bin = encode ("UTF-16LE", lc ($salt));
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my $pbkdf2 = Crypt::PBKDF2->new
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(
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hash_class => 'HMACSHA1',
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iterations => $iterations,
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output_len => 16,
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salt_len => length ($salt_bin),
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);
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my $digest = unpack ("H*", $pbkdf2->PBKDF2 ($salt_bin, md4 (md4 (encode ("UTF-16LE", $word)) . $salt_bin)));
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my $hash = sprintf ("\$DCC2\$%i#%s#%s", $iterations, $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 $signature = substr ($hash, 0, 6);
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return unless ($signature eq '$DCC2$');
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$hash = substr ($hash, 6);
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my @data = split ('#', $hash);
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return unless scalar @data == 3;
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my $iterations = 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 $iterations;
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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, $iterations);
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return ($new_hash, $word);
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}
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1;
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