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68 lines
1.3 KiB
68 lines
1.3 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 Digest::SHA qw (sha1);
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sub module_constraints { [[0, 256], [40, 40], [0, 55], [40, 40], [-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 $sha1_pass = sha1 ($word);
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my $double_sha1 = sha1 ($sha1_pass);
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my $xor_part1 = $sha1_pass;
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my $xor_part2 = sha1 (pack ("H*", $salt) . $double_sha1);
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my $digest = "";
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for (my $i = 0; $i < 20; $i++)
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{
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my $first_byte = substr ($xor_part1, $i, 1);
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my $second_byte = substr ($xor_part2, $i, 1);
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my $xor_result = $first_byte ^ $second_byte;
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$digest .= unpack ("H*", $xor_result);
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}
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my $hash = sprintf ("\$mysqlna\$%s*%s", $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_in, $word) = split (/:/, $line);
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return unless defined $hash_in;
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return unless defined $word;
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my (undef, $signature, $digest) = split ('\$', $hash_in);
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my ($salt, $hash) = split ('\*', $digest);
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return unless ($signature eq 'mysqlna');
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return unless defined $salt;
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return unless defined $hash;
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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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