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57 lines
1.1 KiB
Perl
57 lines
1.1 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::DES;
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sub module_constraints { [[24, 24], [16, 16], [-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 $word1 = substr ($word, 0, 8);
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my $word2 = substr ($word, 8, 8);
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my $word3 = substr ($word, 16, 8);
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my $cipher1 = new Crypt::DES ($word1);
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my $cipher2 = new Crypt::DES ($word2);
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my $cipher3 = new Crypt::DES ($word3);
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my $pt1_bin = pack ("H*", $salt);
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my $ct1_bin = $cipher1->encrypt ($pt1_bin);
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my $ct2_bin = $cipher2->decrypt ($ct1_bin);
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my $ct3_bin = $cipher3->encrypt ($ct2_bin);
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my $hash = sprintf ("%s:%s", unpack ("H*", $ct3_bin), $salt);
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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, $salt, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $salt;
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return unless defined $word;
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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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