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authen::passphrase::mysql323(3pm) [debian man page]

Authen::Passphrase::MySQL323(3pm)			User Contributed Perl Documentation			 Authen::Passphrase::MySQL323(3pm)

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 v5.14.2							    2012-02-07					 Authen::Passphrase::MySQL323(3pm)

Check Out this Related Man Page

Authen::Passphrase::RejectAll(3pm)			User Contributed Perl Documentation			Authen::Passphrase::RejectAll(3pm)

NAME

       Authen::Passphrase::RejectAll - reject all passphrases

SYNOPSIS

	       use Authen::Passphrase::RejectAll;

	       $ppr = Authen::Passphrase::RejectAll->new;

	       $ppr = Authen::Passphrase::RejectAll
		       ->from_crypt("*");

	       $ppr = Authen::Passphrase::RejectAll
		       ->from_rfc2307("{CRYPT}*");

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

	       $passwd = $ppr->as_crypt;
	       $userPassword = $ppr->as_rfc2307;

DESCRIPTION

       An object of this class is a passphrase recogniser that accepts any passphrase whatsoever.  This is a subclass of Authen::Passphrase, and
       this document assumes that the reader is familiar with the documentation for that class.

       This type of passphrase recogniser is obviously of no use at all in controlling access to any resource.	Its use is to permit a resource to
       be completely inaccessible in a system that expects some type of passphrase access control.

CONSTRUCTORS

       Authen::Passphrase::RejectAll->new
	   Returns a reject-all passphrase recogniser object.  The same object is returned from each call.

       Authen::Passphrase::RejectAll->from_crypt(PASSWD)
	   Returns a reject-all passphrase recogniser object.  The same object is returned from each call.  The argument, a crypt string, must be
	   between one and twelve (inclusive) characters long and must not start with "$".

       Authen::Passphrase::RejectAll->from_rfc2307(USERPASSWORD)
	   Generates a new reject-all passphrase recogniser object from an RFC 2307 string.  The string must consist of "{CRYPT}" (case
	   insensitive) followed by an acceptable crypt string.

METHODS

       $ppr->match(PASSPHRASE)
       $ppr->as_crypt
       $ppr->as_rfc2307
	   These methods are part of the standard Authen::Passphrase interface.  The "match" method always returns false.

SEE ALSO

       Authen::Passphrase

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 v5.14.2							    2012-02-07					Authen::Passphrase::RejectAll(3pm)
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