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https://issues.apache.org/jira/browse/DERBY-4229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461022#comment-13461022
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Dag H. Wanvik edited comment on DERBY-4229 at 9/22/12 3:23 PM:
---------------------------------------------------------------
> The encryptionKeyLength=length attribute may also be combined with the
> encryptionProvider=providerName
> and/or encryptionAlgorithm=algorithm attributes. You may wish to use
> encryptionKeyLength=length when
> you specify a non-default encryption algorithm.
If seems you'd want to use eKL *only* iff a) one wants a non default algorithm
(default is DES) and b) the algorithm allows for more than one key length (AES
is mentioned above) and c) one wants a key length that is not default (AES 192
or 256 above).
We should investigate your other questions, Kim, good ones!
was (Author: dagw):
> The encryptionKeyLength=length attribute may also be combined with the
encryptionProvider=providerName
> and/or encryptionAlgorithm=algorithm attributes. You may wish to use
> encryptionKeyLength=length when
> you specify a non-default encryption algorithm.
If seems you'd want to use eKL only iff a) one wants a non default algorithm
(default is DES) and b) the algorithm allows for more than one key length (AES
is mentioned above) and c) one want a key length that is not default (AES 192
or 256 above).
We should investigate your other questions, Kim, good ones!
> encryptionKeyLength connection attribute should be documented
> -------------------------------------------------------------
>
> Key: DERBY-4229
> URL: https://issues.apache.org/jira/browse/DERBY-4229
> Project: Derby
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 10.5.1.1
> Reporter: Kathey Marsden
> Assignee: Kim Haase
> Fix For: 10.5.2.0
>
> Attachments: cdevcsecure67151.html, DERBY-4229-2.diff,
> DERBY-4229-2.stat, DERBY-4229.diff, rrefattribencryptkeylength.html
>
>
> The developer guide says:
> The length of the encryption key depends on the algorithm used:
> AES (128, 192, and 256 bits)
> DES (the default) (56 bits)
> DESede (168 bits)
> All other algorithms (128 bits)
> Note: The boot password should have at least as many characters as number of
> bytes in the encryption key (56 bits=8 bytes, 168 bits=24 bytes, 128 bits=16
> bytes). The minimum number of characters for the boot password allowed by
> Derby is eight.
> For AES, however, it does not tell how to change the default key length of
> 128. This can be changed with the encryptionKeyLength connection attribute.
> The documentation should also specify that special policy files for the JRE
> may be necessary to accomodate the longer length.
> Also note that there is an outstanding issue DERBY-3710 regarding length of
> 192 for AES.
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