CONFIGURATION FILE | Radical Tech Tutorials

#27 SAVE USR/PW (LOCAL) C#

Encrypting Passwords in a .NET app.config File

I wanted to encrypt and decrypt the string as a readable string.Here is a very simple quick example in C# Visual Studio 2019 WinForms based on the methods used in this article. Using the DPAPI, the Data Protection Application Programmer’s Interface.

Right click project > properties > settings > Create a username and password setting.

Now you can leverage those settings you just created. Here I save the username and password but only encrypt the password in it’s respectable value field in the user.config file.

Example of the encrypted string in the user.config file

&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;configuration&gt;
    &lt;userSettings&gt;
        &lt;secure_password_store.Properties.Settings&gt;
            &lt;setting name="username" serializeAs="String"&gt;
                &lt;value&gt;admin&lt;/value&gt;
            &lt;/setting&gt;
            &lt;setting name="password" serializeAs="String"&gt;
                &lt;value&gt;AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAAQpgaPYIUq064U3o6xXkQOQAAAAACAAAAAAAQZgAAAAEAACAAAABlQQ8OcONYBr9qUhH7NeKF8bZB6uCJa5uKhk97NdH93AAAAAAOgAAAAAIAACAAAAC7yQicDYV5DiNp0fHXVEDZ7IhOXOrsRUbcY0ziYYTlKSAAAACVDQ+ICHWooDDaUywJeUOV9sRg5c8q6/vizdq8WtPVbkAAAADciZskoSw3g6N9EpX/8FOv+FeExZFxsm03i8vYdDHUVmJvX33K03rqiYF2qzpYCaldQnRxFH9wH2ZEHeSRPeiG&lt;/value&gt;
            &lt;/setting&gt;
        &lt;/secure_password_store.Properties.Settings&gt;
    &lt;/userSettings&gt;
&lt;/configuration&gt;

<?xml version="1.0" encoding="utf-8"?>

<secure_password_store.Properties.Settings>

<value>admin</value>

</setting>

<value>AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAAQpgaPYIUq064U3o6xXkQOQAAAAACAAAAAAAQZgAAAAEAACAAAABlQQ8OcONYBr9qUhH7NeKF8bZB6uCJa5uKhk97NdH93AAAAAAOgAAAAAIAACAAAAC7yQicDYV5DiNp0fHXVEDZ7IhOXOrsRUbcY0ziYYTlKSAAAACVDQ+ICHWooDDaUywJeUOV9sRg5c8q6/vizdq8WtPVbkAAAADciZskoSw3g6N9EpX/8FOv+FeExZFxsm03i8vYdDHUVmJvX33K03rqiYF2qzpYCaldQnRxFH9wH2ZEHeSRPeiG</value>

</setting>

</secure_password_store.Properties.Settings>

</userSettings>

</configuration>

secure_password_store Download

#23 INI READER/WRITER C#

Simple INI Reader/Writer

INI files are mostly used in C++ and Delphi programming these days. Microsoft’s .Net framework focuses on XML-based config files not INI files. However it is still possible to read and write to INI files using C#. In this example I have created a very simple INI reader. It allows you to read/write to the config file ini_reader_writer_20xx-xx-xx.ini .

There are plenty NuGet packages, such as INI Parser. Which allow easy implementation into our projects. You could also write your own class which gives us more control but is overkill for an example. Example an INI file handling class using C#, P/Invoke and Win32.

ini_reader_writer Download

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INI READER/WRITER C#

#23 INI READER/WRITER C#

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