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Authen::Passphrase::MyUser2Contributed Perl DocAuthen::Passphrase::MySQL323(3)

NAME
       Authen::Passphrase::MySQL323 - passphrases using	the MySQL v3.23
       algorithm

SYNOPSIS
	       use Authen::Passphrase::MySQL323;

	       $ppr = Authen::Passphrase::MySQL323->new(
		       hash_hex	=> "2af8a0a82c8f9086");

	       $ppr = Authen::Passphrase::MySQL323->new(
		       passphrase => "passphrase");

	       $hash = $ppr->hash;
	       $hash_hex = $ppr->hash_hex;

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

DESCRIPTION
       An object of this class encapsulates a passphrase hashed	using the
       algorithm used by MySQL from version 3.23.  This	is a subclass of
       Authen::Passphrase, and this document assumes that the reader is
       familiar	with the documentation for that	class.

       The MySQL v3.23 hash scheme is composed entirely	of linear operations.
       It accepts an arbitrarily long passphrase, and ignores all space	and
       tab characters.	No salt	is used.  62 bits of hash are generated.  Each
       character influences only a minority of the result bits,	so similar
       passphrases of the same length have noticeably similar hashes.

       In MySQL	the hash is represented	as a string of sixteen lowercase
       hexadecimal digits.

       Warning:	This is	not a serious cryptographic algorithm.	Do not use for
       any security purpose.

CONSTRUCTOR
       Authen::Passphrase::MySQL323->new(ATTR => VALUE,	...)
	   Generates a new passphrase recogniser object	using the MySQL	v3.23
	   algorithm.  The following attributes	may be given:

	   hash
	       The hash, as a string of	eight bytes.  The first	and fifth
	       bytes must have their top bit clear.

	   hash_hex
	       The hash, as a string of	16 hexadecimal digits.

	   passphrase
	       A passphrase that will be accepted.

	   Either the hash or the passphrase must be given.

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

       $ppr->hash_hex
	   Returns the hash value, as a	string of 16 hexadecimal digits.

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

SEE ALSO
       Authen::Passphrase, Crypt::MySQL

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

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

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

perl v5.32.0			  2020-08-08   Authen::Passphrase::MySQL323(3)

NAME | SYNOPSIS | DESCRIPTION | CONSTRUCTOR | METHODS | SEE ALSO | AUTHOR | COPYRIGHT | LICENSE

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