1Authen::Passphrase::MySUQsLe3r23C(o3n)tributed Perl DocuAmuetnhteant:i:oPnassphrase::MySQL323(3)
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NAME

6       Authen::Passphrase::MySQL323 - passphrases using the MySQL v3.23
7       algorithm
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SYNOPSIS

10               use Authen::Passphrase::MySQL323;
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12               $ppr = Authen::Passphrase::MySQL323->new(
13                       hash_hex => "2af8a0a82c8f9086");
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15               $ppr = Authen::Passphrase::MySQL323->new(
16                       passphrase => "passphrase");
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18               $hash = $ppr->hash;
19               $hash_hex = $ppr->hash_hex;
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21               if($ppr->match($passphrase)) { ...
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DESCRIPTION

24       An object of this class encapsulates a passphrase hashed using the
25       algorithm used by MySQL from version 3.23.  This is a subclass of
26       Authen::Passphrase, and this document assumes that the reader is
27       familiar with the documentation for that class.
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29       The MySQL v3.23 hash scheme is composed entirely of linear operations.
30       It accepts an arbitrarily long passphrase, and ignores all space and
31       tab characters.  No salt is used.  62 bits of hash are generated.  Each
32       character influences only a minority of the result bits, so similar
33       passphrases of the same length have noticeably similar hashes.
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35       In MySQL the hash is represented as a string of sixteen lowercase
36       hexadecimal digits.
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38       Warning: This is not a serious cryptographic algorithm.  Do not use for
39       any security purpose.
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CONSTRUCTOR

42       Authen::Passphrase::MySQL323->new(ATTR => VALUE, ...)
43           Generates a new passphrase recogniser object using the MySQL v3.23
44           algorithm.  The following attributes may be given:
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46           hash
47               The hash, as a string of eight bytes.  The first and fifth
48               bytes must have their top bit clear.
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50           hash_hex
51               The hash, as a string of 16 hexadecimal digits.
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53           passphrase
54               A passphrase that will be accepted.
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56           Either the hash or the passphrase must be given.
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METHODS

59       $ppr->hash
60           Returns the hash value, as a string of eight bytes.
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62       $ppr->hash_hex
63           Returns the hash value, as a string of 16 hexadecimal digits.
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65       $ppr->match(PASSPHRASE)
66           This method is part of the standard Authen::Passphrase interface.
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SEE ALSO

69       Authen::Passphrase, Crypt::MySQL
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AUTHOR

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

79       This module is free software; you can redistribute it and/or modify it
80       under the same terms as Perl itself.
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84perl v5.32.1                      2021-01-26   Authen::Passphrase::MySQL323(3)
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