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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-6537) StringUtil.fromHexString is used to convert encryptionKey to byte[]
Date Sat, 10 May 2014 21:57:56 GMT

     [ https://issues.apache.org/jira/browse/DERBY-6537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kim Haase updated DERBY-6537:

    Attachment: DERBY-6537.zip

Thanks for your clarifications, Dyre! I'm attaching DERBY-6537.diff, DERBY-6537.stat, and
DERBY-6537.zip, with changes to the following:

M       src/ref/rrefattribencryptkey.dita
M       src/ref/rrefattribnewencryptkey.dita
M       src/devguide/cdevcsecure866716.dita
M       src/devguide/cdevcsecure88690.dita
M       src/devguide/tdevcsecurenewextkey.dita

Please let me know if more changes are needed.

> StringUtil.fromHexString is used to convert encryptionKey to byte[]
> -------------------------------------------------------------------
>                 Key: DERBY-6537
>                 URL: https://issues.apache.org/jira/browse/DERBY-6537
>             Project: Derby
>          Issue Type: Bug
>          Components: Documentation, Services
>    Affects Versions:
>            Reporter: Dyre Tjeldvoll
>            Assignee: Kim Haase
>            Priority: Minor
>         Attachments: DERBY-6537.diff, DERBY-6537.stat, DERBY-6537.zip
> The javadoc for StringUtil.fromHexString states that its intended use is to "Convert
a hexidecimal string generated by toHexString() back into a byte array", and that null is
returned if the length of the hex-string is not even. 
> But in JCECipherFactory.init() it is being used to convert the encryptionKey property
string to byte[]. For this usage such a restriction makes no sense, and is confusing as it
is not documented (at least not in the dev guide chapter about encrypting databases).
> For this usage it would be better to use 
> new BigInt(encryptionKey,16).toByteArray() which would not have this restriction. But
even with this change the documentation should probably be updated to state that the value
for the key must be a valid hex-string, as that is what it will be interpreted as. The first
section of the doc should probably also mention that DES is the default algo, and what its
minimum key length requirements are (now you need to look at the section about specifying
an alternate algo, to find that).

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