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.