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From "Laura Stewart (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1330) Provide runtime privilege checking for grant/revoke functionality
Date Sat, 05 Aug 2006 00:35:14 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1330?page=comments#action_12425914 ] 
            
Laura Stewart commented on DERBY-1330:
--------------------------------------

I want to be certain that I understand cascading object dependencies.  Please correct any
errors that I have in the scenarios below:

1. Table T1 is owned by user u1 and the SELECT privilege on T1 is granted
to user u2. Next, if u2 creates a view v1 on T1, When the SELECT privilege
on T1 is revoked from u2, view v1 is dropped. Queries that access v1 are invalid.

2. Table T1 is owned by user u1 and SELECT privilege on T1 is granted to user u2. Next,
if u2 creates a view v1 on T1, Next, u2 creates a view v2 on v1. When the
SELECT privilege on T1 is revoked from u2, Derby attempts to drop v1, but
because v2 is dependent upon v1, the revoke fails. 

> Provide runtime privilege checking for grant/revoke functionality
> -----------------------------------------------------------------
>
>                 Key: DERBY-1330
>                 URL: http://issues.apache.org/jira/browse/DERBY-1330
>             Project: Derby
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 10.2.0.0
>            Reporter: Mamta A. Satoor
>         Assigned To: Mamta A. Satoor
>         Attachments: AuthorizationModelForDerbySQLStandardAuthorization.html, AuthorizationModelForDerbySQLStandardAuthorizationV2.html,
DERBY1330javaDocWarningsDiffV9.txt, DERBY1330javaDocWarningsStatV9.txt, Derby1330MinorCleanupV7diff.txt,
Derby1330MinorCleanupV7stat.txt, Derby1330PrivilegeCollectionV2diff.txt, Derby1330PrivilegeCollectionV2stat.txt,
Derby1330PrivilegeCollectionV3diff.txt, Derby1330PrivilegeCollectionV3stat.txt, Derby1330setUUIDinDataDictionaryV10diff.txt,
Derby1330setUUIDinDataDictionaryV10stat.txt, Derby1330setUUIDinDataDictionaryV8diff.txt, Derby1330setUUIDinDataDictionaryV8stat.txt,
Derby1330uuidIndexForPermsSystemTablesV4diff.txt, Derby1330uuidIndexForPermsSystemTablesV4stat.txt,
Derby1330uuidIndexForPermsSystemTablesV5diff.txt, Derby1330uuidIndexForPermsSystemTablesV5stat.txt,
Derby1330uuidIndexForPermsSystemTablesV6diff.txt, Derby1330uuidIndexForPermsSystemTablesV6stat.txt,
Derby1330ViewPrivilegeCollectionV1diff.txt, Derby1330ViewPrivilegeCollectionV1stat.txt
>
>
> Additional work needs to be done for grant/revoke to make sure that only users with required
privileges can access various database objects. In order to do that, first we need to collect
the privilege requirements for various database objects and store them in SYS.SYSREQUIREDPERM.
Once we have this information then when a user tries to access an object, the required SYS.SYSREQUIREDPERM
privileges for the object will be checked against the user privileges in SYS.SYSTABLEPERMS,
SYS.SYSCOLPERMS and SYS.SYSROUTINEPERMS. The database object access will succeed only if the
user has the necessary privileges.
> SYS.SYSTABLEPERMS, SYS.SYSCOLPERMS and SYS.SYSROUTINEPERMS are already populated by Satheesh's
work on DERBY-464. But SYS.SYSREQUIREDPERM doesn't have any information in it at this point
and hence no runtime privilege checking is getting done at this point.

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