[jira] Updated: (DERBY-4551) Allow database user to execute stored procedures with same permissions as database owner and/or routine definer

["Dag H. Wanvik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-4551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dag H. Wanvik updated DERBY-4551:
---------------------------------

        Summary: Allow database user to execute stored procedures with same permissions as database owner and/or routine definer  (was: Allow database user to execute stored procedures with same permissions as database owner)
        Urgency:   (was: Urgent)
    Component/s: SQL

Updated title, set component to SQL, reset Urgency field since that is reserved by dev team at triage time.

> Allow database user to execute stored procedures with same permissions as database owner and/or routine definer
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4551
>                 URL: https://issues.apache.org/jira/browse/DERBY-4551
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.5.3.0
>            Reporter: Tushar Kale
>         Attachments: definers_rights.html
>
>
> Curretnly there is no way to hide data and database structure in embedded derby from the end user. 
> One way to accomplish the above requirement is as follows:
> 1. Create encrypted database so data is protected
> 2. Enable authentication and sql authorization in database
> 3. Create two users, dbUser and dbOwner
> 4. Store application logic as stored procedure in the databse so dbUser does not know what tables are accecced by the application logic, thus hiding table structure
> 5. Revoke select permission from dbUser so he cannot describe tables thus protecting table structures
> 6. Give only Execute permissions on stored procedures to dbUser
> The above steps will ensure that data and data structure is hidden when application is delivered to end user.
> The problem is, if user does not have select permission, the stored procedures will not execute. So I am requesting the following enhancement to Derby:
> If dbOwner has given Execure permission to stored procecure to a dbUser, then allow stored procedure to execute even if the dbUser has no select permission. 
> In otherwords, When dbUser calls stored procedure, database will use dbOwners authorization to execute stored procedure rather than dbUsers.  
> This may be implemented by creating new permission called RunAsDbOwner.
> DbOwner can then grant permission to dbUser  to execute a stored procedure with RunAsDbOwner.
> If this is implemented, applications can be created which will truely hide the database structure and data from end users. Database will behave as a blackbox with only in/out data exposed in stored procedures.

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