Simple .NET/ASP.NET PDF document editor web control SDK

This demonstrates a technique by which we can restrict the set of roles that can be enabled while using proxy authentication, no matter what roles have been granted to the user for whom we are proxying. This again enables us to apply the principle of least privilege. One of the questions you may have is, what happens to auditing since all users are now logging in as the proxy user midtier Won t they lose their identity in the database We discuss this issue in the next section.

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Here is an example of using a tuple in a return type: val divmod : int -> int -> int * int.

A critical difference between the case where we use proxy authentication and the case where we share database accounts between multiple end users without using proxy authentication is that proxy authentication preserves the identity of the end user. We can see this by auditing user connections. To enable auditing, we execute the following alter system command as the system user: alter system set audit_trail=db scope=spfile; We shut down and restart the database for auditing to take effect. Next, we audit proxy connections by issuing the following command as the sys user: sys@ORA10G> audit connect by midtier on behalf of clerk1, manager1; Audit succeeded. We then execute our program DemoProxyConnection again: B:\>java DemoProxyConnection db_clerk1 successfully connected... trimmed to save space We log in as sys and run a select from dba_audit_trail to verify that the connection was audited: sys@ORA10G> select a.username proxied_user, b.username proxy_user, 2 a.action_name, a.comment_text 3 from dba_audit_trail a, dba_audit_trail b 4 where a.proxy_sessionid = b.sessionid; PROXIED_USER PROXY_USER ACTION_NAM COMMENT_TEXT --------------- ---------- ---------- -------------------DB_CLERK1 MIDTIER LOGOFF Authenticated by: PR OXY;EXTERNAL NAME: R MENON-LAP\menon To see more details on the database auditing feature, see 8 of Oracle Database Security Guide (10g Release 1). Next, we briefly examine the various proxy authentication modes available to us.

Values from the web page can be gathered and passed back to the server as a string Two values are passed, an argument and a context (more values could easily be passed using a delimited string) The argument can be used from the server-side processing, but the context cannot It is actually passed to the callback method to establish, client-side, how the event originated Another critical parameter that you specify is the name of the JavaScript function that should be called when the work is done and a response is sent back You can also, optionally, specify the name of a client-side function to call if an error occurs The server-side processing can do any work, but can only return a string Again, if you desire a more complex structure, you can build a delimited string on the server and split it when it gets to the client.

In this section, we look at a small number of recommendations when writing implementation code, as opposed to library designs. We don t give many recommendations on formatting, because formatting code is relatively simple for #light indentation-aware code. We do give a couple of formatting recommendations that early readers of this book asked about.