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Posted to dev@couchdb.apache.org by "Chris Anderson (JIRA)" <ji...@apache.org> on 2011/05/08 05:11:03 UTC

[jira] [Commented] (COUCHDB-1060) CouchDB should use a secure password hash method instead of the current one

    [ https://issues.apache.org/jira/browse/COUCHDB-1060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13030450#comment-13030450 ] 

Chris Anderson commented on COUCHDB-1060:
-----------------------------------------

I love this. Currently the user passwords are too insecure. A slow hash algorithm makes offline cracking harder.

It would require changes to the API to have crypto only run on the server, but it might be simpler.

Chris

> CouchDB should use a secure password hash method instead of the current one
> ---------------------------------------------------------------------------
>
>                 Key: COUCHDB-1060
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1060
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>    Affects Versions: 1.0.2
>            Reporter: Nuutti Kotivuori
>            Assignee: Robert Newson
>            Priority: Minor
>             Fix For: 1.2
>
>         Attachments: pbkdf2.erl, pbkdf2.erl
>
>
> CouchDB passwords are stored in a salted, hashed format of a 128-bit salt combined with the password under SHA-1. This method thwarts rainbow table attacks, but is utterly ineffective against any dictionary attacks as computing SHA-1 is very fast indeed.
> If passwords are to be stored in a non-plaintext equivalent format, the hash function needs to be a "slow" hash function. Suitable candidates for this could be bcrypt, scrypt and PBKDF2. Of the choices, only PBKDF2 is really widely used, standardized and goverment approved. (Note: don't be fooled that the PBKDF2 is a "key derivation" function - in this case, it is exactly the same thing as a slow password hash.)
> http://en.wikipedia.org/wiki/PBKDF2

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