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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3200) Developer's Guide: Add examples showing use of SQL authorization with user authentication
Date Thu, 10 Apr 2008 20:36:04 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kim Haase updated DERBY-3200:
-----------------------------

    Attachment: sqlauthclientshutdown.txt
                sqlauthclient.txt
                sqlauthembedded.txt

I figured out most of the weird results -- sorry for the noise. (The database was not where
I thought it was and must have been a leftover from a previous run after all.) The old authentication/authorization
examples work fine.

I changed the SQL authorization programs so that the default connection mode for the network
client example is fullAccess (the default), so that the GRANT statement can restrict privileges.

The embedded example works as expected: see the attached file sqlauthembedded.txt.

But I am still getting an error on the GRANT statement in the SQL authorization client example:

    s.execute("GRANT SELECT, INSERT ON accessibletbl TO sqlsam");
    System.out.println("Granted select/insert privileges to sqlsam");

This is what happens:

---SQLException Caught---

SQLState:   42Z60
Severity: -1
Message:  GRANT not allowed unless database property derby.database.sqlAuthorization has value
'TRUE'.
java.sql.SQLSyntaxErrorException: GRANT not allowed unless database property derby.database.sqlAuthorization
has value 'TRUE'.
        at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)

The program goes on to allow sqlsam to do everything he wants, because he has the default
fullAccess privilege. See the attached file sqlauthclient.txt.

I tried stopping and restarting the network server between the first and second client programs,
but that caused worse things to happen. See the attached file sqlauthclientshutdown.txt.

I am using different jar files to invoke the programs: derby.jar for the embedded program,
and derbyclient.jar for the client programs. Could that make any difference?

I'll attach updated versions of the programs in addition to the program output files.

> Developer's Guide: Add examples showing use of SQL authorization with user authentication
> -----------------------------------------------------------------------------------------
>
>                 Key: DERBY-3200
>                 URL: https://issues.apache.org/jira/browse/DERBY-3200
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Kim Haase
>            Assignee: Kim Haase
>            Priority: Minor
>         Attachments: auth2.log, AuthExampleClientSQLAuth1.java, AuthExampleClientSQLAuth2.java,
AuthExampleEmbeddedSQLAuth.java, rdevcsecuresqlauthembeddedex.dita, sqlauthclient.txt, sqlauthclientshutdown.txt,
sqlauthembedded.txt
>
>
> This is the followup to DERBY-1823 that Francois Orsini suggested.
> I've been experimenting and reading the Developer's Guide section on SQL authorization
(User authorizations, cdevcsecure36595).
> It appears that the only use of SQL authorization mode is to restrict user access, not
to expand it.
> For example, if you set the default connection mode to noAccess, a user with fullAccess
can't grant any privileges to a user with noAccess. And presumably if the default connection
mode is readOnlyAccess, a user with fullAccess can't grant any privileges beyond SELECT, which
the user has anyway.
> Only if the default connection mode is fullAccess is SQL authorization mode meaningful.
That means that a fullAccess user can use GRANT to restrict another user's privileges on a
particular database that the user owns.
> I'm running into a problem at the end, though. At the beginning of the program, as nobody
in particular, I was able to create several users, some of them with full access. But at the
end of the program, it seems that even a user with full access isn't allowed to turn off those
database properties:
> Message:  User 'MARY' does not have execute permission on PROCEDURE 'SYSCS_UTIL'.'SYSCS_SET_DATABASE_PROPERTY'.
> This seems a bit extreme. I know that with SQL authorization on, "the ability to read
from or write to database objects is further restricted to the owner of the database objects."
But the ability to execute built-in system procedures? Can I log in as SYSCS_UTIL? How? 
> I realize that having access to SYSCS_SET_DATABASE_PROPERTY would allow me to in effect
delete myself -- but that's essentially what I do at the end of the program that sets derby.connection.requireAuthentication
but not derby.database.sqlAuthorization. 
> The documentation does say that once you have turned on SQL authorization, you can't
turn it off. But it doesn't say that you can't turn anything else off, either!
> I'll attach the program I've been using. Most of the stacktraces are expected, but I'm
stumped by that last one.

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