public void Test_Decrypt_DecryptsTheCiphertext_WhenTheSameStrategyInstanceIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
Assert.Equal("Hello world", strategy.Decrypt(ciphertext));
}
public void Test_Decrypt_DecryptsTheCiphertext_WhenTheSameConfigurationIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
strategy = new AesEncryptionStrategy(strategy.KeySize, strategy.IterationCount, strategy.Salt, strategy.Iv, "password");
Assert.Equal("Hello world", strategy.Decrypt(ciphertext));
}
public void Test_Decrypt_DoesNotDecryptTheCiphertext_WhenTheIncorrectSaltIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
strategy = new AesEncryptionStrategy(strategy.KeySize, strategy.IterationCount, "133D30C2A658B3081279A97FD3B1F7CDE10C4FB61D39EEA8", strategy.Iv, "password");
try
{
strategy.Decrypt(ciphertext);
throw new TestFailedException();
}
catch (CryptographicException ce)
{
// this is expected
}
}
public void Test_Decrypt_DoesNotDecryptTheCiphertext_WhenTheIncorrectIterationCountIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
strategy = new AesEncryptionStrategy(strategy.KeySize, 2000, strategy.Salt, strategy.Iv, "password");
try
{
strategy.Decrypt(ciphertext);
throw new TestFailedException();
}
catch (CryptographicException ce)
{
// this is expected
}
}
public void test_decrypt_doesNotDecryptTheCiphertext_WhenTheIncorrectPassphraseIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
strategy = new AesEncryptionStrategy(strategy.KeySize, strategy.IterationCount, strategy.Salt, strategy.Iv, "The Wrong Password");
try
{
strategy.Decrypt(ciphertext);
Assert.Fail();
}
catch (CryptographicException ce)
{
// this is expected
}
}
public void test_decrypt_doesNotDecryptTheCiphertext_WhenTheIncorrectIvIsUsed()
{
strategy = new AesEncryptionStrategy(128, 1000, "password");
string ciphertext = strategy.Encrypt("Hello world");
strategy = new AesEncryptionStrategy(strategy.KeySize, strategy.IterationCount, strategy.Salt, "1DED89E4FB15F61DC6433E3BADA4A891", "password");
try
{
strategy.Decrypt(ciphertext);
Assert.Fail();
}
catch (CryptographicException ce)
{
// this is expected
}
}
public void TestAesEncryptionStrategy2(byte[] privateKey)
{
var strategy = new AesEncryptionStrategy(privateKey);
var encryptRequest = Encoding.UTF8.GetBytes("Hello World!");
var encryptResponse = strategy.Encrypt(encryptRequest);
encryptResponse.Length.Should().Be(32);
// test using a new instance of the strategy
strategy = new AesEncryptionStrategy(privateKey);
var decryptRequest = encryptResponse;
var decryptResponse = strategy.Decrypt(decryptRequest);
decryptResponse.SequenceEqual(encryptRequest).Should().BeTrue();
}