Authen::Passphrase::EggdropBlowfish - passphrases using Eggdrop's blowfish.mod

       Andrew Main (Zefram) <zefram@fysh.org>

       Authen::Passphrase::EggdropBlowfish->new(ATTR => VALUE, ...)
           Generates a new passphrase recogniser object using the Eggdrop blowfish.mod algorithm.  The following
           attributes may be given:

           hash
               The hash, as a string of eight bytes.

           hash_base64
               The hash, as a string of twelve base 64 digits.

           passphrase
               A passphrase that will be accepted.

           Either the hash or the passphrase must be given.

       Copyright (C) 2006, 2007, 2009, 2010, 2012 Andrew Main (Zefram) <zefram@fysh.org>

       An object of this class encapsulates a passphrase hashed using the Blowfish-based algorithm used in
       Eggdrop's blowfish.mod.  This is a subclass of Authen::Passphrase, and this document assumes that the
       reader is familiar with the documentation for that class.

       This hash scheme uses no salt, and does not accept a zero-length passphrase.  It uses the passphrase as a
       Blowfish key to encrypt a standard plaintext block.  The hash is the ciphertext block.  The standard
       Blowfish key schedule only accepts keys from 8 to 56 bytes long; this algorithm relaxes that requirement
       and accepts any non-zero length.  Up to 72 bytes of passphrase/key are significant; any more are ignored.

       In Eggdrop the hash is represented as a "+" followed by twelve base 64 digits.  The first six digits
       encode the second half of the hash, and the last six encode the first half.  Within each half the bytes
       are encoded in reverse order.  The base 64 digits are ".", "/", "0" to "9", "a" to "z", "A" to "Z" (in
       that order).

       Warning: The hash is small by modern standards, and the lack of salt is a weakness in this scheme.  For a
       scheme that makes better use of Blowfish see Authen::Passphrase::BlowfishCrypt.

       This  module  is  free  software;  you  can redistribute it and/or modify it under the same terms as Perl
       itself.

perl v5.34.0                                       2022-06-08              Authen::Passph...EggdropBlowfish(3pm)

       $ppr->hash
           Returns the hash value, as a string of eight bytes.

       $ppr->hash_base64
           Returns the hash value, as a string of twelve base 64 digits.

       $ppr->match(PASSPHRASE)
           This method is part of the standard Authen::Passphrase interface.

       Authen::Passphrase::EggdropBlowfish - passphrases using Eggdrop's blowfish.mod

       Authen::Passphrase, Crypt::Eksblowfish::Uklblowfish

               use Authen::Passphrase::EggdropBlowfish;

               $ppr = Authen::Passphrase::EggdropBlowfish->new(
                       hash_base64 => "9tpsG/61YqX/");

               $ppr = Authen::Passphrase::EggdropBlowfish->new(
                       passphrase => "passphrase");

               $hash = $ppr->hash;
               $hash_base64 = $ppr->hash_base64;

               if($ppr->match($passphrase)) { ...