public void ImportFromXml_CreatesAppropriateDescriptor()
{
// Arrange
var masterKey = Convert.ToBase64String(Encoding.UTF8.GetBytes("[PLACEHOLDER]"));
var descriptor = new CngGcmAuthenticatedEncryptorDescriptor(
new CngGcmAuthenticatedEncryptorConfiguration()
{
EncryptionAlgorithm = Constants.BCRYPT_AES_ALGORITHM,
EncryptionAlgorithmKeySize = 192,
EncryptionAlgorithmProvider = null
},
masterKey.ToSecret());
var control = CreateEncryptorInstanceFromDescriptor(descriptor);
var xml = $@"
<descriptor version='1' xmlns:enc='http://schemas.asp.net/2015/03/dataProtection'>
<encryption algorithm='AES' keyLength='192' />
<masterKey enc:requiresEncryption='true'>{masterKey}</masterKey>
</descriptor>";
var deserializedDescriptor = new CngGcmAuthenticatedEncryptorDescriptorDeserializer().ImportFromXml(XElement.Parse(xml));
var test = CreateEncryptorInstanceFromDescriptor(deserializedDescriptor as CngGcmAuthenticatedEncryptorDescriptor);
// Act & assert
byte[] plaintext = new byte[] { 1, 2, 3, 4, 5 };
byte[] aad = new byte[] { 2, 4, 6, 8, 0 };
byte[] ciphertext = control.Encrypt(new ArraySegment <byte>(plaintext), new ArraySegment <byte>(aad));
byte[] roundTripPlaintext = test.Decrypt(new ArraySegment <byte>(ciphertext), new ArraySegment <byte>(aad));
Assert.Equal(plaintext, roundTripPlaintext);
}
public void ExportToXml_WithoutProviders_ProducesCorrectPayload()
{
// Arrange
var masterKey = Convert.ToBase64String(Encoding.UTF8.GetBytes("[PLACEHOLDER]"));
var descriptor = new CngGcmAuthenticatedEncryptorDescriptor(new CngGcmAuthenticatedEncryptorConfiguration()
{
EncryptionAlgorithm = "enc-alg",
EncryptionAlgorithmKeySize = 2048
}, masterKey.ToSecret());
// Act
var retVal = descriptor.ExportToXml();
// Assert
Assert.Equal(typeof(CngGcmAuthenticatedEncryptorDescriptorDeserializer), retVal.DeserializerType);
var expectedXml = $@"
<descriptor>
<encryption algorithm='enc-alg' keyLength='2048' />
<masterKey enc:requiresEncryption='true' xmlns:enc='http://schemas.asp.net/2015/03/dataProtection'>
<value>{masterKey}</value>
</masterKey>
</descriptor>";
XmlAssert.Equal(expectedXml, retVal.SerializedDescriptorElement);
}
private static IAuthenticatedEncryptor CreateEncryptorInstanceFromDescriptor(CngGcmAuthenticatedEncryptorDescriptor descriptor)
{
var encryptorFactory = new CngGcmAuthenticatedEncryptorFactory(NullLoggerFactory.Instance);
var key = new Key(
keyId: Guid.NewGuid(),
creationDate: DateTimeOffset.Now,
activationDate: DateTimeOffset.Now + TimeSpan.FromHours(1),
expirationDate: DateTimeOffset.Now + TimeSpan.FromDays(30),
descriptor: descriptor,
encryptorFactories: new[] { encryptorFactory });
return(key.CreateEncryptor());
}