public void TestAESEncryption()
{
EncryptionService ES = new EncryptionService();
string plaintext = "Hello World!";
Tuple <string, string, string> keyInfo1 = ES.AESEncrypt(plaintext);
Assert.AreNotEqual(keyInfo1.Item1, plaintext);
Assert.AreNotEqual(keyInfo1.Item2, plaintext);
Assert.AreNotEqual(keyInfo1.Item3, plaintext);
string decrypted1 = ES.AESDecrypt(keyInfo1.Item1, keyInfo1.Item2, keyInfo1.Item3);
Assert.AreEqual(plaintext, decrypted1);
Tuple <string, string, string> keyInfo2 = ES.AESEncrypt(plaintext);
Assert.AreNotEqual(keyInfo2.Item1, plaintext);
Assert.AreNotEqual(keyInfo2.Item2, plaintext);
Assert.AreNotEqual(keyInfo2.Item3, plaintext);
string decrypted2 = ES.AESDecrypt(keyInfo2.Item1, keyInfo2.Item2, keyInfo2.Item3);
Assert.AreEqual(plaintext, decrypted2);
// Make sure we are not encrypted the same message the same way twice
Assert.AreNotEqual(keyInfo1.Item1, keyInfo2.Item1);
Assert.AreNotEqual(keyInfo1.Item2, keyInfo2.Item2);
Assert.AreNotEqual(keyInfo1.Item3, keyInfo2.Item3);
}