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From "Daniel John Debrunner (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1330) Provide runtime privilege checking for grant/revoke functionality
Date Sat, 08 Jul 2006 06:05:31 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1330?page=comments#action_12419837 ] 

Daniel John Debrunner commented on DERBY-1330:

Mamta wrote: "I am proposing the method name to be changed from "isExecutingWithInvokerPrivileges"
to "isPrivilegeCollectionRequired". I tend to get too verbose with my method names"

Not at all, that method name describes exactly what it does, a perfect name.

One issue with the patch is that your change to the new (correct) name seems to be only half
implemented, e.g.

+	public boolean isPrivilegeCollectionRequired()
+	{
+		return(accessWithInvokerPrivileges);
+	}

Shouldn't the field name accessWithInvokerPrivileges be the same as the method name?

Then for:

+	public void accessThisWithDefinerPrivileges()
+	{
+		accessWithInvokerPrivileges = false;
+	}

Shouldn't this method be called something like, ' disablePrivilegeCollection'?

Otherwise my earlier concerns still stand, in the future will we have to change the name of
accessWithInvokerPrivileges /accessThisWithDefinerPrivileges  because their usage (stop collection)
might not match the access mode.

Other comments on the patch are the similarity of the code in the create  constant actions
for triggers and views, in fact the one in trigger has only views as examples in the comments.
This is the code that converts the list of privileges into a list of dependencies (or added
dependencies). Could this code be shared, what about the one in create constraint?

If you can address these & earlier comments I will commit the patch.

> Provide runtime privilege checking for grant/revoke functionality
> -----------------------------------------------------------------
>          Key: DERBY-1330
>          URL: http://issues.apache.org/jira/browse/DERBY-1330
>      Project: Derby
>         Type: Sub-task

>   Components: SQL
>     Versions:
>     Reporter: Mamta A. Satoor
>     Assignee: Mamta A. Satoor
>  Attachments: AuthorizationModelForDerbySQLStandardAuthorization.html, AuthorizationModelForDerbySQLStandardAuthorizationV2.html,
Derby1330PrivilegeCollectionV2diff.txt, Derby1330PrivilegeCollectionV2stat.txt, Derby1330ViewPrivilegeCollectionV1diff.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.
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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