Each encryption provider has its own pros and cons. Also the DPAPI provider is available, it is installed by default as an operating system built-in component. This method depends on private keys that can be shared among several machines, this makes it the right solution when working with several environments, such as development, testing and production. This result in a non-suitable solution when working with web farms.
On the server you can use cmd. The same process will be applicable for the other versions. The only difference will be that you need to open Visual Studio Command Prompt from the folder of the respective version of Visual Studio installed on your machine. In order to encrypt the ConnectionString section in the Web. Section Name — The name of the section of the Web. Config file to be encrypted.
For this case, the value will be connectionStrings. Path of the folder — Here we need to specify the path of the folder containing the Web. Encrypted Connection Strings section in the Web. The following screenshot shows the Encrypted Connection Strings section in the Web.
Config file after encryption. Net Code behind. Net will automatically decrypt the Connection String when it is fetched in the code behind and hence in code behind you need to access the Connection String in the same way as you would do normally. Decrypting the Connection Strings section in Web. In order to decrypt the ConnectionString section in the Web. Config file to be decrypted. For this case the value will be connectionStrings. Related Articles.
This method returns the web configuration file for the specified virtual path. Next, the Web. The ConfigurationSection object includes a SectionInformation property that provides additional information and functionality regarding the configuration section. As the code above shows, we can determine whether the configuration section is encrypted by checking the SectionInformation property s IsProtected property.
Moreover, the section can be encrypted or decrypted via the SectionInformation property s ProtectSection provider and UnprotectSection methods. The ProtectSection provider method accepts as input a string specifying the name of the protected configuration provider to use when encrypting.
The UnprotectSection method can determine the provider that was used to encrypt the configuration section and therefore does not require any input parameters. After calling the ProtectSection provider or UnprotectSection method, you must call the Configuration object s Save method to persist the changes.
Once the configuration information has been encrypted or decrypted and the changes saved, we call DisplayWebConfig to load the updated Web.
Once you have entered the above code, test it by visiting the EncryptingConfigSections. You should initially see a page that lists the contents of Web. Now click the Encrypt Connection Strings button. If request validation is enabled, the markup posted back from the WebConfigContents TextBox will produce an HttpRequestValidationException , which displays the message, A potentially dangerous Request.
Form value was detected from the client. Request validation, which is enabled by default in ASP. This check can be disabled at the page- or application-level. To turn it off for this page, set the ValidateRequest setting to false in the Page directive.
The Page directive is found at the top of the page s declarative markup. For more information on request validation, its purpose, how to disable it at the page- and application-level, as well as how to HTML encode markup, see Request Validation - Preventing Script Attacks.
After disabling request validation for the page, try clicking the Encrypt Connection Strings button again. The TextBox is then updated to display the new Web.
This information is used by the UnprotectSection method when the Decrypt Connection Strings button is clicked. When the connection string information is accessed from Web. As Figure 5 shows, the tutorial works exactly as we would expect it, indicating that the encrypted connection string information is being automatically decrypted by the ASP.
NET page. On postback you should see the connection strings in Web. At this point your screen should look like it did when first visiting this page see in Figure 3. Another useful command line tool in this folder is the ASP.
As its name implies, the ASP. Alternatively, if the web application is registered in IIS you can enter the virtual path instead of the physical path using the following syntax:. Instead of using the -pef switch, use -pdf or instead of -pe , use -pd. Also, note that the provider name is not necessary when decrypting.
For example, if you run this command line program from your local development machine and then upload the encrypted Web. This process is known as authentication and SQL Server provides two methods of authentication:. Windows authentication is preferred over SQL authentication because it is more secure. With Windows authentication the connection string is free from a username and password and if the web server and database server reside on two different machines, the credentials are not sent over the network in plain-text.
With SQL authentication, however, the authentication credentials are hard-coded in the connection string and are transmitted from the web server to the database server in plain-text. These tutorials have used Windows authentication. You can tell what authentication mode is being used by inspecting the connection string. The connection string in Web. The following example shows a connection string that uses SQL authentication.
Note the credentials are embedded within the connection string:.
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