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https://issues.apache.org/jira/browse/SOLR-4392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14509370#comment-14509370
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Noble Paul commented on SOLR-4392:
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Another solution is to do a two pass request. Using a PKI solution

* Send a GET request to DIH and it would give back a public key of a key pair 
it generated internally and stored in-memory
* send the password, encrypted with the public key as a param .

This assumes that , the Solr server did not get restarted in between

> DIH - Need to externalize or encrypt username/password stored within 
> data-config.xml
> ------------------------------------------------------------------------------------
>
>                 Key: SOLR-4392
>                 URL: https://issues.apache.org/jira/browse/SOLR-4392
>             Project: Solr
>          Issue Type: New Feature
>          Components: contrib - DataImportHandler
>    Affects Versions: 4.0, 4.1
>            Reporter: Senthuran Sivananthan
>         Attachments: SOLR-4392.patch
>
>
> Today, the connection (database or otherwise) credentials is wide open in 
> data-config.xml.  Not really an issue until someone sends out the config file 
> outside of the server.
> We should look into externalizing the database lookup or providing a way to 
> encrypt the username and password.
> The needs are:
> 1/  Some projects want to enable multi-tenancy where data for each core is 
> situated in different database servers w/ their own credentials.  We need a 
> way to expose hooks that will allow implementations to be plugged in.  It can 
> be done though the "type" attribute on the dataSource, but providing a 
> factory might work better.
> 2/  Most orgs are very protective of their credentials and weary of 
> plain-text settings.



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