Book Image

C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition

Book Image

C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition

Overview of this book

If you want to build powerful cross-platform applications with C# 7 and .NET Core, then this book is for you. First, we’ll run you through the basics of C#, as well as object-oriented programming, before taking a quick tour through the latest features of C# 7 such as tuples, pattern matching, out variables, and so on. After quickly taking you through C# and how .NET works, we’ll dive into the .NET Standard 1.6 class libraries, covering topics such as performance, monitoring, debugging, serialization and encryption. The final section will demonstrate the major types of application that you can build and deploy cross-device and cross-platform. In this section, we’ll cover Universal Windows Platform (UWP) apps, web applications, mobile apps, and web services. Lastly, we’ll look at how you can package and deploy your applications so that they can be hosted on all of today’s most popular platforms, including Linux and Docker. By the end of the book, you’ll be armed with all the knowledge you need to build modern, cross-platform applications using C# and .NET Core.
Table of Contents (24 chapters)
C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Signing data


To prove that some data has come from someone we trust, it can be signed. Actually, you don't sign the data itself; instead, you sign a hash of the data. We will use the RSA algorithm combined with the SHA256 algorithm.

Signing with SHA256 and RSA

In the Ch11_CryptographyLib class library project, add the following code to the Protector class:

    public static string PublicKey; 
 
    public static string ToXmlString( 
      this RSA rsa, bool includePrivateParameters) 
    { 
      var p = rsa.ExportParameters(includePrivateParameters); 
      XElement xml; 
      if (includePrivateParameters) 
      { 
        xml = new XElement("RSAKeyValue" 
          , new XElement("Modulus", Convert.ToBase64String(p.Modulus)) 
          , new XElement("Exponent",  
            Convert.ToBase64String(p.Exponent)) 
          , new XElement("P", Convert.ToBase64String(p.P)) 
          , new XElement("Q", Convert.ToBase64String...