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Date: Tue, 27 Mar 2012 17:24:26 +0000 (UTC)
From: "Kim Haase (Resolved) (JIRA)" <jira@apache.org>
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Subject: [jira] [Resolved] (DERBY-5550) Document
 derby.authentication.builtin.saltLength and
 derby.authentication.builtin.iterations
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     [ https://issues.apache.org/jira/browse/DERBY-5550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kim Haase resolved DERBY-5550.
------------------------------

          Resolution: Fixed
       Fix Version/s: 10.9.0.0
    Issue & fix info:   (was: Patch Available)

Thanks again, Knut! 

Once again, no commit email, but I committed patch DERBY-5550-2.diff to documentation trunk at revision 1305875. 

                
> Document derby.authentication.builtin.saltLength and derby.authentication.builtin.iterations
> --------------------------------------------------------------------------------------------
>
>                 Key: DERBY-5550
>                 URL: https://issues.apache.org/jira/browse/DERBY-5550
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 10.9.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Kim Haase
>             Fix For: 10.9.0.0
>
>         Attachments: DERBY-5550-2.diff, DERBY-5550-2.zip, DERBY-5550.diff, DERBY-5550.stat, DERBY-5550.zip
>
>
> DERBY-5539 introduced two new properties that control how BUILTIN stores credentials:
> - derby.authentication.builtin.saltLength (default: 16)
> This property specifies the number of bytes of random salt that will be added to the credentials before hashing them. (Purpose of the property: Make it infeasible to construct rainbow tables.)
> - derby.authentication.builtin.iterations (default: 1000, minimum: 1)
> This property specifies the number of times to apply the hash function (which is specified by derby.authentication.builtin.algorithm) on the credentials. (Purpose of the property: Slow down attackers as they'll need to spend more time calculating hashes.)
> Both the properties have effect only if BUILTIN authentication is enabled and derby.authentication.builtin.algorithm has a non-null value.

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