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91 lines
1.6 KiB
91 lines
1.6 KiB
#!/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::ScryptKDF qw (scrypt_hash);
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use MIME::Base64 qw (decode_base64);
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sub module_constraints { [[0, 256], [1, 15], [-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 $N = shift // 16384;
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my $r = shift // 8;
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my $p = shift // 1;
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my $hash_buf = scrypt_hash ($word, $salt, $N, $r, $p, 32);
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my $hash = sprintf ('%s', $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 $line = shift;
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# scrypt
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return unless (substr ($line, 0, 7) eq 'SCRYPT:');
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# get hash
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my $index1 = index ($line, ":", 7);
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return if $index1 < 1;
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# N
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my $N = substr ($line, 7, $index1 - 7);
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my $index2 = index ($line, ":", $index1 + 1);
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return if $index2 < 1;
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# r
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my $r = substr ($line, $index1 + 1, $index2 - $index1 - 1);
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$index1 = index ($line, ":", $index2 + 1);
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return if $index1 < 1;
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# p
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my $p = substr ($line, $index2 + 1, $index1 - $index2 - 1);
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$index2 = index ($line, ":", $index1 + 1);
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return if $index2 < 1;
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# salt
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my $salt = substr ($line, $index1 + 1, $index2 - $index1 - 1);
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$salt = decode_base64 ($salt);
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$index1 = index ($line, ":", $index2 + 1);
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return if $index1 < 1;
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# digest
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my $word = substr ($line, $index1 + 1);
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return unless defined $salt;
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return unless defined $word;
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return unless defined $N;
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return unless defined $r;
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return unless defined $p;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt, $N, $r, $p);
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return ($new_hash, $word);
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}
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1;
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