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Security testing has become an integral part of Microsoft's culture in recent years. Reactions to malicious software and spyware have given all engineers at Microsoft a security mindset. Security testing is such a major subject that it is more worthy of an entire book than a section of this single chapter. In fact, a quick browse on an online bookstore shows me no less than half a dozen books on security testing, including books written by Microsoft employees such as Hunting Security Bugs by Gallagher, Landauer, and Jeffries, as well two security books in the How to Break series by James Whittaker (who is also a noted software security expert). Additionally, Writing Secure Code by Howard and LeBlanc is on many testers' bookshelves at Microsoft. Any of these books or others on the subject will be beneficial if you desire depth or breadth in this area. The tester's role in security testing is not just to find the bugs, but to determine whether and how the bug can be exploited. A few of the key approaches and techniques for security testing are discussed in the following subsections.
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Note The FCL defines an ISurrogateSelector interface and also defines a
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6 . . Run the application . At first, you should be able to see the outlines of all the shapes because they start out with an opacity of 60 percent, as shown in the following graphic:
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Listing 10-2 shows an example of a regular query with its result. The query is a join over three tables, providing information about all employees and their departments. Note that we use an alias in the SELECT clause (see line 6) to make sure that all columns in the query result have different names. See line 2, where you select the ENAME column, too.
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On a schedule At logon At startup On idle On an event At task creation or modification On connection to a user session On disconnect from a user session On workstation lock On workstation unlock
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string addSQL = "INSERT INTO Products (Name, Description) " + "VALUES (@name, @description)"; string updateSQL = "UPDATE Products SET Name = @name, " + "Description = @description WHERE Id = @id"; string deleteSQL = "DELETE FROM Products WHERE Id = @id"; // Create the commands to update the original table in the database DbCommand insertCommand = defaultDB.GetSqlStringCommand(addSQL); defaultDB.AddInParameter(insertCommand, "name", DbType.String, "Name", DataRowVersion.Current); defaultDB.AddInParameter(insertCommand, "description", DbType.String, "Description", DataRowVersion.Current); DbCommand updateCommand = defaultDB.GetSqlStringCommand(updateSQL); defaultDB.AddInParameter(updateCommand, "name", DbType.String, "Name", DataRowVersion.Current); defaultDB.AddInParameter(updateCommand, "description", DbType.String, "Description", DataRowVersion.Current); defaultDB.AddInParameter(updateCommand, "id", DbType.String, "Id", DataRowVersion.Original); DbCommand deleteCommand = defaultDB.GetSqlStringCommand(deleteSQL); defaultDB.AddInParameter(deleteCommand, "id", DbType.Int32, "Id", DataRowVersion.Original);
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s Before you edit any source file, I recommend that you make a backup of the original file. For article Tip content creation and parameter configuration, the Joomla user interface provides a sandbox environment that will keep you from making a change that will stop the system from functioning. This is not the case when you make direct file edits a small change to a file could bring down the whole system. You don t want to need to reinstall Joomla if you can t correct the change that made everything stop functioning. With a backup, you can simply restore the initial file to return the system to functioning order.
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The result of 1 indicates that Line2 and Area2 are disjoint .
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order, ending up with handled(e,o) for employee e handled order o. That s not wrong, and in fact it might be the best way to begin if we were designing a database to support queries to return S. To de ne S mathematically, however, the three-detail notion is closer to what de nes S as a set of customers: whether a particular customer c is in the set S. It s harder to express S mathematically with the two-detail interpretation.
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Data access in Silverlight applications works differently than it does in traditional applications. You ll need to be aware of how it works and the limitations. In this chapter, you will look at what makes data access different, and then explore mechanisms for accessing data in a Silverlight application.
SET LOCK_TIMEOUT 5000; SELECT keycol, col1, col2 FROM dbo.T1;
Description
table 1 Defining a caching strategy What Data that applies to all users of the application and does not change frequently, or data that you can use to optimize reference data lookups, avoid network round-trips, and avoid unnecessary and duplicate processing. Examples are data such as product lists, constant values, and values read from configuration or a database. Where possible, cache data in a ready-to-use format. Do not cache volatile data, and do not cache sensitive data unless you encrypt it. You can cache data when the application starts if you know it will be required and it is unlikely to change. However, you should cache data that may or may not be used, or data that is relatively volatile, only when your application first accesses it. Ideally, you should cache data as near as possible to the code that will use it, especially in a layered application that is distributed across physical tiers. For example, cache data you use for controls in your user interface in the presentation layer, cache business data in the business layer, and cache parameters for stored procedures in your data layer. If your application runs on multiple servers and the data may change as the application runs, you will usually need to use a distributed cache accessible from all servers. If you are caching data for a user interface, you can usually cache the data on the client. Caching is a crosscutting concern you are likely to implement caching in several places, and in many of your applications. Therefore, a reusable and configurable caching mechanism that you can install in the appropriate locations is the obvious choice. The Caching Application Block is an ideal solution for non-distributed caching. It supports both an in-memory cache and, optionally, a backing store that can be either a database or isolated storage. The block provides all the functionality needed to retrieve, add, and remove cached data, and supports configurable expiration and scavenging policies.
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<asp:TreeView ID="TreeView1" runat="server" DataSourceID="TreeSiteMapDataSource"> </asp:TreeView>
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Figure 14.2 Registry Editor showing Identities key values When you want to describe a set of keys and subkeys to show their relationships, you separate each key from the highest in position to the lowest using a backslash character. For example, the complete name for the Identities subkey would be HKEY_CURRENT_USER\Identities. How Producer Uses the Registry for Publishing Producer, like most software, uses the registry to fill a variety of data storage needs. The focus in this chapter is on how Producer stores the data related to the publishing process and the Publish Wizard.
Select Backup Items in the left pane. Select the drives you want to add and clear the drives you want removed. Click OK.
There is one more twist to this story: To the CLR, all assemblies are identified by name, version, culture, and public key . However, the GAC identifies assemblies using name, version, culture, public key, and CPU architecture . When searching the GAC for an assembly, the CLR figures out what type of process the application is currently running in: 32-bit x86 (possibly using the WoW64 technology), 64-bit x64, or 64-bit IA64 . Then, when searching the GAC for an assembly, the CLR first searches for a CPU architecture specific version of the assembly . If it does not find a matching assembly, it then searches for a CPU-agnostic version of the assembly . In this section, you saw how the CLR locates an assembly when using a default policy . However, an administrator or the publisher of an assembly can override the default policy . In the next two sections, I ll describe how to alter the CLR s default binding policy . Note The CLR supports the ability to move a type (class, structure, enum, interface, or delegate) from one assembly to another . For example, in .NET 3 .5, the System.TimeZoneInfo class is defined in the System .Core .dll assembly . But in .NET 4 .0, Microsoft moved this class to the MSCorLib .dll assembly . Normally, moving a type from one assembly to another would break applications . However, the CLR offers a System.Runtime.CompilerServices. TypeForwardedToAttribute attribute, which can be applied to the original assembly (such as System .Core .dll) . The parameter that you pass to this attribute s constructor is of type System.Type and it indicates the new type (that is now defined in MSCorLib .dll) that applications should now use . The CLR s binder uses this information . Since the TypeForwardedToAttribute s constructor takes a Type, the assembly containing this attribute will be dependent on the new assembly defining the type . If you take advantage of this feature, then you should also apply the System.Runtime. CompilerServices.TypeForwardedFromAttribute attribute to the type in the new assembly and pass to this attribute s constructor a string with the full name of the assembly that used to define the type . This attribute typically is used for tools, utilities, and serialization . Since the TypeForwardedFromAttribute s constructor takes a String, the assembly containing this attribute is not dependent on the assembly that used to define the type .
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