Encryptiondecryption Framework

The ASP.NET Core framework provides a new API for protecting data, including mechanisms for encryption and decryption. This article takes a quick look at how they can be used. Then it described the core concepts on which the encryptiondecryption system is built and how to use the components to securely encrypt and decrypt data.

I wrote some AES encryptiondecryption methods with the following requirements Inputs should be easy-to-use strings. Something encrypted in a .NET 6 app using these methods should be able to be decrypted in a .NET Framework 4.8 app using the same methods. I do NOT need military or banking grade encryption.

NuGet92Install-Package EncryptionDecryption -Version 1.0.1 Copy This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package .

This allows you to separate the logic for encryptiondecryption from your controllers, promoting cleaner code and reusability. using Microsoft.AspNetCore.DataProtection public class EncryptionService private readonly IDataProtector _protector Constructor to initialize the IDataProtector using dependency injection public EncryptionService

Secret-Key Encryption. Secret-key encryption algorithms use a single secret key to encrypt and decrypt data. You must secure the key from access by unauthorized agents, because any party that has the key can use it to decrypt your data or encrypt their own data, claiming it originated from you.

Symmetric encryption and asymmetric encryption are performed using different processes. Symmetric encryption is performed on streams and is therefore useful to encrypt large amounts of data.

The .NET Framework provides classes for several different types of cryptography, including symmetric and asymmetric encryption, hashing, and digital signatures. With symmetric encryption, the algorithm, or cipher, is reversible, and the behavior of the algorithm depends on the length of the key. The same key that is used to encrypt the data is

RijndaelManaged This is a class provided by the .NET framework to perform AES encryption. Key The crypt key is the encryption key used. It must be 128, 192, or 256 bits long 16, 24, or 32 bytes. IV initVector is the initialization vector, which is used to add randomness to the encryption process.

Create the EncryptionDecryption Middleware. Now, we need to create an AES Encryption Middleware that will do the following things Intercepts HTTP requests and responses. For incoming POSTPUT requests, decrypts the request body if encrypted. For outgoing responses, it encrypts the response body before sending it to the client.

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