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https://issues.apache.org/jira/browse/SHIRO-213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12927645#action_12927645
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Michael Kogan commented on SHIRO-213:
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Some thoughts as I am working on this for my project.
Assertion:
It is undesirable to store the number of hash iterations and to a lesser degree
hash algorithm with the credentials.
I realize this is security-by-obscurity, but sometimes obscurity is enough.
Conclusion:
Use version information stored with the credentials, with the code interpreting
the version's mapping to hashing algorithm and number of iterations.
Actions:
* Add version to SaltedAuthenticationInfo or create
VersionedSaltedAuthenticationInfo
* Hashed credentials matcher uses the version to look up the hashing
algorithm and number of hash iterations in HashingManager
* Create HashingManager class that given a version can return the hashing
algorithm and number of hash iterations
* Add HashingManager to SecurityManager, allow it to be configured
programtically or through ini
Any thoughts?
> Password and hash management
> ----------------------------
>
> Key: SHIRO-213
> URL: https://issues.apache.org/jira/browse/SHIRO-213
> Project: Shiro
> Issue Type: New Feature
> Reporter: Alan Cabrera
>
> Sometimes secure hashes are long lived. I usually will hash something but
> prefix the string to be hashed with a secret password; I will usually add a
> bit of salt too. Often I will need to change the password to that hash on a
> periodic basis. Sometimes I find out that a particular hash algorithm is no
> longer secure and need to change my hash. What do I do with the old hashes?
> How can I tell them apart from the new ones?
> What I do is store the hashes as tuples which contain enough information my
> code to figure out what hash to use. All of this applies to encryption as
> well.
> I'm wondering is if we should provide some kind of manager to manage all
> this.
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