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71 lines
1.3 KiB
Perl
71 lines
1.3 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], [-1, -1], [-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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my $iter = shift // 1024;
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if (length $salt == 0)
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{
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$salt = random_hex_string (128, 128);
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}
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my $pbkdf2 = Crypt::PBKDF2->new (
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 512),
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iterations => $iter
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);
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my $hash_buf = unpack ("H*", $pbkdf2->PBKDF2 (pack ("H*", $salt), $word));
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my $hash = sprintf ("grub.pbkdf2.sha512.%i.%s.%0128s", $iter, $salt, $hash_buf);
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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 $index1 = index ($line, ":");
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return if $index1 < 1;
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my $hash_in = substr ($line, 0, $index1);
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my $word = substr ($line, $index1 + 1);
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my $index2 = index ($hash_in, ".", 19);
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return if $index2 < 1;
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my $index3 = index ($hash_in, ".", $index2 + 1);
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my $salt = substr ($hash_in, $index2 + 1, $index3 - $index2 - 1);
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my $iter = substr ($hash_in, 19, $index2 - 19);
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return unless defined $salt;
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return unless defined $word;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt);
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return ($new_hash, $word);
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}
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1;
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