Book Image

Apps and Services with .NET 7

By : Mark J. Price
Book Image

Apps and Services with .NET 7

By: Mark J. Price

Overview of this book

Apps and Services with .NET 7 is for .NET 6 and .NET 7 developers who want to kick their C# and .NET understanding up a gear by learning the practical skills and knowledge they need to build real-world applications and services. It covers specialized libraries that will help you monitor and improve performance, secure your data and applications, and internationalize your code and apps. With chapters that put a variety of technologies into practice, including Web API, OData, gRPC, GraphQL, SignalR, and Azure Functions, this book will give you a broader scope of knowledge than other books that often focus on only a handful of .NET technologies. It covers the latest developments, libraries, and technologies that will help keep you up to date. You’ll also leverage .NET MAUI to develop mobile apps for iOS and Android as well as desktop apps for Windows and macOS.
Table of Contents (23 chapters)

Signing data

To prove that some data has come from someone we trust, it can be signed. You do not sign the data itself; instead, you sign a hash of the data, because all the signature algorithms first hash the data as an implementation step. They also allow you to shortcut this step and provide the data already hashed.

We will be using the SHA256 algorithm for generating the hash, combined with the RSA algorithm for signing the hash.

We could use DSA for both hashing and signing. DSA is faster than RSA for generating a signature, but it is slower than RSA for validating a signature. Since a signature is generated once but validated many times, it is best to have faster validation than generation.

Good Practice: DSA is rarely used today. The improved equivalent is Elliptic Curve DSA (ECDSA). Although ECDSA is slower than RSA, it generates a shorter signature with the same level of security.

Signing with SHA256 and RSA

Let’s explore signing data...