public void TestKeysGenerating()
{
RSA rsa = new RSA(RSA.KEY_SIZE);
string pubKey = TextConversion.Base64Encode(rsa.GetPublicKey());
string privKey = TextConversion.Base64Encode(rsa.GetPrivateKey());
string message = "Hello world";
string encryptedText = RSA.Encrypt(message, RSA.SetKeyFromString(pubKey));
string plainText = RSA.Decrypt(encryptedText, RSA.SetKeyFromString(privKey));
Assert.AreEqual(message, plainText);
}
public void KeyDerivation()
{
// Set variables
string password = "******";
string salt = "8VySCxa42j9McSqGjZxCVQnH4x4rSZszEL9YQT3VkZ75xbBD";
string requestedKey = "Vu+/ve+/ve+/vWfvv71d77+9Ou+/vQ==";
// get your derived key
var derivedKey = PBKDF2.keyDerivate(password, salt, 1024, 10);
// I converting this to base64 to compare if keys are equal.
Assert.AreEqual(requestedKey, TextConversion.Base64Encode(derivedKey));
}
public void EncryptionTest()
{
// Create RSA Keys
RSA rsa = new RSA(RSA.KEY_SIZE);
string pubKey = TextConversion.Base64Encode(rsa.GetPublicKey());
string privKey = TextConversion.Base64Encode(rsa.GetPrivateKey());
byte[] dataToEncrypt = new byte[300];
RandomNumberGenerator.Fill(dataToEncrypt);
// Create AES Keys
byte[] key = new byte[16];
RandomNumberGenerator.Fill(key);
byte[] aad = new byte[32];
RandomNumberGenerator.Fill(aad);
// SECURE GCM Key
// Encrypt Key for AES with RSA and check if given and decrypted keys are equal
byte[] encryptedAeskey = RSA.EncryptBytes(key, RSA.SetKeyFromString(pubKey));
byte[] decryptedAesKey = RSA.DecryptBytes(encryptedAeskey, RSA.SetKeyFromString(privKey));
Assert.IsTrue(key.SequenceEqual(decryptedAesKey));
// ENCRYPT DATA
// Encrypt with key and decrypt with DecryptedAesKey
byte[] encryptedData = GCM.Encrypt(dataToEncrypt, key, aad);
byte[] decryptedData = GCM.Decrypt(encryptedData, decryptedAesKey, aad);
Assert.IsTrue(dataToEncrypt.SequenceEqual(decryptedData));
string stringToEncrypt = "Ahoj svet";
byte[] encryptedStringData = GCM.Encrypt(Encoding.UTF8.GetBytes(stringToEncrypt), key, aad);
byte[] decryptedStringData = GCM.Decrypt(encryptedStringData, decryptedAesKey, aad);
Assert.AreEqual(stringToEncrypt, Encoding.UTF8.GetString(decryptedStringData));
}