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=head1 NAME |
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Deliantra::Util - utility cruft |
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=head1 SYNOPSIS |
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use Deliantra::Util; |
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=head1 DESCRIPTION |
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Various utilities that come in handy when dealing with Deliantra. |
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=over 4 |
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=cut |
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package Deliantra::Util; |
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use Digest::SHA; |
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use Digest::SHA3; |
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=item Deliantra::Util::hash_pw $cleartext |
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Hashes a cleartext password into the binary password used in the protocol. |
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=cut |
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sub hash_pw($) { |
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# we primarily want to protect the password itself, and |
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# secondarily want to protect us against pre-image attacks. |
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# we trust nist, but not a single hash function, so we |
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# use both sha and sha3 |
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my $pw = shift; |
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for (0..20) { |
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$pw = Digest::SHA3::sha3_512 $pw; |
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$pw = "deliantrakdf$pw" x 32; |
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$pw = Digest::SHA::sha512 $pw; |
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} |
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$pw |
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} |
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=item Deliantra::Util::auth_pw $hash, $nonce1, $nonce2 |
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Authenticates a (hashed) password using the given nonce. |
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=cut |
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sub auth_pw($$) { |
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my ($pass, $nonce1, $nonce2) = @_; |
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# simple HMAC application |
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Digest::SHA3::sha3_512 $nonce1 . Digest::SHA3::sha3_512 $nonce2 . $hash |
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} |
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=back |
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=head1 AUTHOR |
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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=cut |
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1 |
