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Listing 8-42. Querying ACL in the preDispatch() Method of /library/CMS/Controller/Plugin/Acl.php // fetch the current user $auth = Zend_Auth::getInstance(); if($auth->hasIdentity()) { $identity = $auth->getIdentity(); $role = strtolower($identity->role); }else{ $role = 'guest'; } $controller = $request->controller; $action = $request->action; if (!$acl->isAllowed($role, $controller, $action)) { if ($role == 'guest') { $request->setControllerName('user'); $request->setActionName('login'); } else { $request->setControllerName('error'); $request->setActionName('noauth'); } } Once this plugin is set up, you need to register the plugin with the front controller. You can do this by passing the plugin to the front controller application resource in the application.ini file (see Listing 843). Listing 8-43. Registering the ACL Plugin with the Front Controller in application/configs/application.ini resources.frontController.plugins.acl = "CMS_Controller_Plugin_Acl" Finally, you need to create the not authorized error page, which you can do with Zend_Tool. Execute the command in Listing 8-44 from your command line. Listing 8-44. Creating the noauth Error Page with Zend_Tool zf create action noauth error Then update this page with an error message. This message should let the user know that they are not authorized to access the resource, as shown in Listing 8-45. Listing 8-45. The noauth Error Page in application/views/scripts/error/noauth.phtml <h2>Error: Not Authorized!</h2> <p>Sorry, you are not authorized to access this resource.</p>

The sa account still exists in SQL Server 2008, but Microsoft recommends that you use the sysadmin fixed server role instead, which has the same (unlimited) powers. In addition, SQL Server installation enforces a password for the sa account, so you will not be able to use a blank password (even though having a blank password is really easy to remember).

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Although having the common language runtime (CLR) enabled for a database server brings much new functionality to SQL Server, it also brings potential security loopholes if not administered correctly. There are few limits to the tasks that an unsafe SQL assembly can perform if the appropriate security code isn t put in place (see the Code Access Security section later in this chapter); for example, with poor security, a SQL assembly could have access to the entire file system on the database server. Therefore, database administrators (DBAs) need to be especially vigilant of which actions .NET code is allowed to perform. For this reason, the CLR is disabled by default and needs to be explicitly enabled before SQL assemblies can be executed on that server. CLR support can be enabled by executing the sp_configure stored procedure with the 'clr enabled' option. You also need to run RECONFIGURE to activate this change: sp_configure 'clr enabled', 1 GO RECONFIGURE GO

A poster in the comp.unix.shell newsgroup asked how to count the words beginning with f in a comma-separated list. The is what the list, in a variable $A, contained: A=qad,security,printq,mfgpro,sugroup,f000000m,f000000r,f000000s,m000000r,m000000s

SQL Server 2005 introduced the Database Mail replacement for SQLMail. Not only is Database Mail based on Simple Mail Transfer Protocol (SMTP), but it also leverages Service Broker for extremely fast and reliable e-mail service from SQL Server. With this flexibility and power, DBAs should be careful about who they give permissions to send mail, as it is quite easy to turn SQL Server into a spam engine. In addition, Database Mail should be configured to encrypt message contents, as messages are sent in plain text by default. This may require additional setup work for your SMTP server; however, you will mitigate packet-sniffing attacks by encrypting this channel. Database Mail can be enabled through the Configure Database Mail Wizard, which is launched from the context menu of the Management Database Mail node in Object Explorer. Note that Database Mail relies on Service Broker, so it will work only if it s run in a database for which Service Broker has been enabled. See 9 for details about Service Broker.

SQLMail is the traditional mail technology built into SQL Server, and it has been replaced by Database Mail. SQLMail poses the same potential security vulnerabilities as Database Mail, but with the added risk that, because it s based on Messaging Application Programming Interface (MAPI), rather than directly on SMTP SQLMail can read as well as send mail. This means that you need to make sure , not only that any stored procedures that use SQLMail can t send data from SQL Server to people who aren t intended to access it, but also that it can t be misused to access data stored in the e-mail account of the MSSQLServer service. Even worse, because it s MAPI-based, SQLMail requires Outlook to be installed on the SQL Server machine, with all the attendant risks of viruses and worms transmitted through e-mail. Finally, SQLMail runs as an extended stored procedure in the same address space as the SQL Server process, so any failure could impact the entire server. SQLMail can be enabled programmatically as follows: EXEC sp_configure 'SQL Mail XPs', 1 GO RECONFIGURE GO

The script uses printf and a modified $IFS to replace the commas with newlines and pipe the output to grep -c. Usage cwbw STRING With the preceding string in variable $A, cwbw counts the number of words beginning with f: $ cwbw "$A" 3 The Script IFS=, printf "%s\n" $* | grep -c "^f"

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