CryptoShark

Data Encryption Package for .NET 6

Version History

Version 1.0 - Initial Release

• Password Based Encryption
• RSA Public/Private Key Encryption

Version 2.1 - Update March 2022

• .NET 6 Update
• Added ECC Encryption

Version 2.1.2 - Update April 2022

• Added back the ability to work with Pkcs8 Encrypted Keys

About

Code written on macOS Catalina (10.15) updated on Windows 11

The concept is to have a simple and powerful took for Data Encryption with cross platform support (Windows, macOS, Linux).

BouncyCastle is the core of the Encryption and Decryption removing any concerns of export restrictions.

Encryption is done with a 256 Bit Key using Galois/Counter Mode (GCM). The following encryption algorithms are supported:

• AES
• Camellia
• CAST6 / CAST-256
• RC6
• Serpent
• TwoFish

Usage

string password = "Abc123"; byte[] data = new byte[4096];

Password Based Encryption

        // Encrypt
        CryptoShark.PBEncryption encryption = new CryptoShark.PBEncryption();

        var encrypted = encryption.Encrypt(data, password, CrytoShark.EncryptionAlgorithm.TwoFish);

        // Decrypt
        var decrypted = encryption.Decrypt(encrypted.EncryptedData,
                        password,
                        encrypted.Algorithm,
                        encrypted.GcmNonce,
                        encrypted.PbkdfSalt,
                        encrypted.Sha384Hmac,
                        encrypted.Itterations);

RSA Encryption

This is the most simplistic example the RSAUtilites can also encrypt the RSA Private keys as well as other functions. See documentation.

        // Create the RSA Encryption Object
        CryptoShark.RsaEncryption encryption = new CryptoShark.RsaEncryption();

        // Create a Couple RSA Keys
        var key1 = encryption.RSAUtilities.CreateRsaKey(2048);
        var key2 = encryption.RSAUtilities.CreateRsaKey(2048);

        // Get the Public Keys
        var key1Pub = encryption.RSAUtilities.GetRsaPublicKey(key1);
        var key2Pub = encryption.RSAUtilities.GetRsaPublicKey(key2);

        // Encrypt
        var encrypted = encryption.Encrypt(data, key1Pub, key2, CrytoShark.EncryptionAlgorithm.TwoFish);

        // Decrypt
        var decrypted = encryption.Decrypt(encrypted.EncryptedData,
            key2Pub,
            key1,
            encrypted.Algorithm,
            encrypted.GcmNonce,
            encrypted.RSASignature,
            encrypted.EncryptionKey);

ECC Encryption

This is the most simplistic example the ECCUtilites can also encrypt the ECC Private keys as well as other functions. See documentation.

        // Create the ECC Encryption Object
        CryptoShark.EccEncryption encryption = new CryptoShark.EccEncryption();

        // Create a Couple ECC Keys
        var key1 = encryption.EccUtilities.CreateEccKey(ECCurve.NamedCurves.nistP256);
        var key2 = encryption.EccUtilities.CreateEccKey(ECCurve.NamedCurves.nistP256);

        // Get the Public Keys
        var key1Pub = encryption.ECCUtilities.GetEccPublicKey(key1);
        var key2Pub = encryption.ECCUtilities.GetEccPublicKey(key2);

        // Encrypt
        var encrypted = encryption.Encrypt(data, key1Pub, key2, CrytoShark.EncryptionAlgorithm.TwoFish);

        // Decrypt
        var decrypted = encryption.Decrypt(encrypted.EncryptedData,
            key2Pub,
            key1,
            encrypted.Algorithm,
            encrypted.GcmNonce,
            encrypted.ECCSignature);

Hashing

CryptoShark has a Hashing engine supporting most common Hash Algorithms The CryptoShark.HashUtilites has two static methods for hashing data. One returns a string in the specified encoding (Hex, Base64 or Bas64Url) The other a ReadOnlySpan