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66 lines
1.2 KiB
Perl
66 lines
1.2 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 Crypt::PBKDF2;
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sub module_constraints { [[0, 256], [64, 64], [-1, -1], [-1, -1], [-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 $salt = shift;
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$salt = pack ("H*", $salt);
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my $kdf = Crypt::PBKDF2->new
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(
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hash_class => 'HMACSHA1',
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iterations => 100000,
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output_len => 20
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);
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my $key = $kdf->PBKDF2_hex ($salt, $word);
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my $hash = sprintf ('$pbkdf2-hmac-sha1$100000$%s$%s', unpack ("H*", $salt), $key);
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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 $idx = index ($line, ':');
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return unless $idx >= 0;
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my $hash = substr ($line, 0, $idx);
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my $word = substr ($line, $idx + 1);
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return unless substr ($hash, 0, 25) eq '$pbkdf2-hmac-sha1$100000$';
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my (undef, $signature, $iter, $salt) = split '\$', $hash;
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return unless defined $signature;
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return unless defined $iter;
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return unless defined $salt;
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return unless $iter == 100000;
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return unless length $salt == 64;
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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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