public void Test_Decrypt()
{
var cipherWithFixedIv = new AeadAes256CbcHmacSha512Cipher(new FakeRandomNumberGenerator(Iv));
var actualPlainText = cipherWithFixedIv.Decrypt(Key, CipherText, AssociatedData);
Assert.Equal(Plaintext, actualPlainText);
}
public void Test_WorksWithRealIvGenerator()
{
var cipherWithRandomIv = new AeadAes256CbcHmacSha512Cipher();
var cipherText = cipherWithRandomIv.Encrypt(Key, Plaintext, AssociatedData);
var roundTripPlainText = cipherWithRandomIv.Decrypt(Key, cipherText, AssociatedData);
Assert.Equal(Plaintext, roundTripPlainText);
}
public void Test_DecryptBadCipherText()
{
var cipherWithFixedIv = new AeadAes256CbcHmacSha512Cipher(new FakeRandomNumberGenerator(Iv));
var bogusCipherText = (byte[])CipherText.Clone();
bogusCipherText[0]++;
Assert.Throws <InvalidCiphertextException>(() => cipherWithFixedIv.Decrypt(Key, bogusCipherText, AssociatedData));
}
public void Test_AssociatedDataCanBeEmpty()
{
var emptyByteArray = Array.Empty <byte>();
var cipherWithFixedIv = new AeadAes256CbcHmacSha512Cipher(new FakeRandomNumberGenerator(emptyByteArray));
var cipherText = cipherWithFixedIv.Encrypt(Key, Plaintext, emptyByteArray);
var roundTripPlainText = new AeadAes256CbcHmacSha512Cipher().Decrypt(Key, cipherText, emptyByteArray);
Assert.Equal(Plaintext, roundTripPlainText);
}
public void Test_EncryptBadKeySize()
{
var cipherWithFixedIv = new AeadAes256CbcHmacSha512Cipher(new FakeRandomNumberGenerator(Iv));
Assert.Throws <InvalidCryptoKeyException>(() => cipherWithFixedIv.Encrypt(new byte[0], CipherText, AssociatedData));
}