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<asp:Label ID="usernameLabel" style="z-index: 101; left: 362px; position: absolute; top: 126px" Runat="server">Username:</asp:Label> <asp:Label ID="passwordLabel" style="z-index: 102; left: 364px; position: absolute; top: 184px" Runat="server">Password:</asp:Label> <asp:TextBox ID="usernameTextBox" style="z-index: 103; left: 452px; position: absolute; top: 121px" TabIndex="1" Runat="server" Width="145px" Height="22px"> </asp:TextBox> <input style="z-index: 106; left: 451px; width: 145px; position: absolute; top: 181px; height: 22px" tabindex="2" type="password" name="passwordTextBox" id="passwordTextBox" /> <asp:Button ID="submitButton" OnClick="SubmitButton_Click" style="z-index: 105; left: 576px; position: absolute; top: 231px"TabIndex="3" Runat="server" Text="Login"> </asp:Button> </div> </form> </body> </html> Then enhance the Login.aspx.cs file as shown in Listing 13-12. Listing 13-12. Modified Login.aspx.cs File using System; using BusinessLayer; using DataLayer; public partial class Login_aspx : System.Web.UI.Page { private void SubmitButton_Click(object sender, System.EventArgs e) { string passwordText = Request.Params["passwordTextBox"]; UserData userData = new UserData(); User user = userData.GetUser(usernameTextBox.Text, passwordText); } } That s it for this task. Let s move to the last one for this user story.

So, now you can prevent users from seeing data in particular rows if they attempt to query a particular column that is protected by your policy. However, what if you want to allow users to still be able to see all of the rows but prevent them from seeing the data in a particular column You can do that by using a technique called column masking. Column masking allows you to display all the rows but mask (replace with NULL) the values of the specified columns for the restricted rows. This might sound complicated at first, but fortunately, it is incredibly simple to implement. First, drop the existing policy: apexdemo@DBTEST> begin 2 dbms_rls.drop_policy( 3 object_name => 'buglist', 4 policy_name => 'Buglist Policy'); 5 end; 6 / PL/SQL procedure successfully completed.

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You should know enough about Linux now to perform most important Linux-related tasks. Don t forget, however, that this was just a short introduction to a very rich and sophisticated operating system. Now, let s forget about Linux for a while and discuss in the next chapter how you can connect to Open Enterprise Server from any workstation.

Now re-create the policy, as shown in Listing 5-18. Listing 5-18. Re-creating the Policy to Use Column Masking apexdemo@DBTEST> begin 2 dbms_rls.add_policy( 3 object_schema => 'apexdemo', 4 object_name => 'buglist', 5 policy_name => 'Buglist Policy', 6 function_schema => 'apexdemo', 7 policy_function => 'vpd_buglist', 8 statement_types => 'select', 9 sec_relevant_cols => 'assigned_to', 10 sec_relevant_cols_opt => DBMS_RLS.ALL_ROWS); 11* end; PL/SQL procedure successfully completed. Note that, this time, you have included a new parameter, sec_relevant_cols_opt, setting the value to DBMS_RLS.ALL_ROWS, which is a constant defined in the DBMS_RLS package. The inclusion of this new parameter means that you want to have all of the rows returned from the VPD policy. Now connect to SQL*Plus as the jimb user and query the table again, as shown in Listing 5-19. Listing 5-19. Column Masking in Effect with the Policy jimb@DBTEST> select bugid, reported, reported_by, assigned_to 2 from apexdemo.buglist; BUGID ---------1 2 3 4 5 6 7 8 9 10 11 REPORTED --------27-JAN-06 01-FEB-06 02-AUG-06 03-FEB-06 03-FEB-06 05-FEB-06 06-FEB-06 06-FEB-06 07-FEB-06 07-FEB-06 08-FEB-06 REPORTED_BY ------------------Rachel Hudson Caroline White Carl Watson Laura Barnes Lucy Scott Chris Donaldson Paul Matthews Mark Lawson John Stevens Steven Green Mark Lawson ASSIGNED_TO ----------jimb

n the previous chapter, you read about SUSE Linux Enterprise Server, which is used as the operating system in OES - Linux. In this chapter, you ll learn more about NetWare, the operating system used in OES - NetWare, and be introduced to the kernel and console interface of this operating system.

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Like any other operating system, NetWare consists of three major components. At the heart of the operating system, there s the kernel. This is the part that manages the dataflow from the services running on NetWare to the hardware. In order to recognize the hardware available in the server, NetWare uses drivers that can be loaded and unloaded as needed. In addition to the kernel are the services, such as the different processes running on top of NetWare.

Lastly, you need to give the users an indication of whether or not they successfully logged in. First, enhance the Login.aspx file as shown in Listing 13-13.

08-FEB-06 09-FEB-06 09-DEC-05 10-FEB-06 10-FEB-06 11-FEB-06 11-FEB-06

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