public void Test_That_Default_Encrpytion_Can_Be_Restored_And_That_Algorithms_Are_Applied_Correctly()
{
// Arrange
var serializableObject = new SerializableClass { Field = "Test_That_Default_Encrpytion_Can_Be_Restored_And_That_Algorithms_Are_Applied_Correctly" };
var streamWithEncryption = new List<byte>();
var streamWithDefaultEncryption = new List<byte>();
var streamWithOverriddenEncryption = new List<byte>();
var streamWithRestoredDefaultEncryption = new List<byte>();
var dataContractSerializer = new DataContractSerializer(serializableObject.GetType());
var serializerEncryptor = new DataContractSerializerEncrpytor(dataContractSerializer);
// Setup a mock stream
var mockStream = new Mock<Stream>();
mockStream.SetupAllProperties();
mockStream.Setup(stream => stream.Write(It.IsAny<byte[]>(), It.IsAny<int>(), It.IsAny<int>()))
.Callback(
(byte[] buffer, int offset, int count) =>
streamWithEncryption.AddRange(buffer));
mockStream.SetupGet(stream => stream.CanWrite).Returns(true);
// Act
// Setup default encrpytion output
serializerEncryptor.WriteObjectEncrypted(mockStream.Object, serializableObject);
streamWithDefaultEncryption.AddRange(streamWithEncryption);
// Change and apply encrpytion
serializerEncryptor.OverrideEncryption(
new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 },
new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 },
new DESCryptoServiceProvider());
streamWithEncryption.Clear();
serializerEncryptor.WriteObjectEncrypted(mockStream.Object, serializableObject);
streamWithOverriddenEncryption.AddRange(streamWithEncryption);
// Now change the encrpytion back
serializerEncryptor.RestoreDefaultEncryption();
streamWithEncryption.Clear();
serializerEncryptor.WriteObjectEncrypted(mockStream.Object, serializableObject);
streamWithRestoredDefaultEncryption.AddRange(streamWithEncryption);
// Assert
// Our stream with default encrpytion should equal our stream with restored encryption
Assert.IsTrue(streamWithDefaultEncryption.SequenceEqual(streamWithRestoredDefaultEncryption));
// Both default and restored encryption schemes should be differed from the overriden one.
Assert.IsFalse(streamWithDefaultEncryption.SequenceEqual(streamWithOverriddenEncryption));
Assert.IsFalse(streamWithRestoredDefaultEncryption.SequenceEqual(streamWithOverriddenEncryption));
}
public void Verify_That_Overriden_Encryption_Is_Applied_When_Key_And_Iv_Are_Overriden()
{
// Arrange
var serializableObject = new SerializableClass { Field = "Verify_That_Overriden_Encryption_Is_Applied_When_Key_And_Iv_Are_Overriden" };
var streamWithEncryption = new List<byte>();
var streamWithDefaultEncryption = new List<byte>();
var streamWithOverriddenEncryption = new List<byte>();
var dataContractSerializer = new DataContractSerializer(serializableObject.GetType());
var serializerEncryptor = new DataContractSerializerEncrpytor(dataContractSerializer);
// Setup a mock stream
var mockStream = new Mock<Stream>();
mockStream.SetupAllProperties();
mockStream.Setup(stream => stream.Write(It.IsAny<byte[]>(), It.IsAny<int>(), It.IsAny<int>()))
.Callback(
(byte[] buffer, int offset, int count) =>
streamWithEncryption.AddRange(buffer));
mockStream.SetupGet(stream => stream.CanWrite).Returns(true);
// Act
// Setup default encrpytion output
serializerEncryptor.WriteObjectEncrypted(mockStream.Object, serializableObject);
streamWithDefaultEncryption.AddRange(streamWithEncryption);
streamWithEncryption.Clear();
// Change and apply encrpytion
serializerEncryptor.OverrideEncryption(
new byte[] { 9, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2 },
new byte[] { 9, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 });
serializerEncryptor.WriteObjectEncrypted(mockStream.Object, serializableObject);
streamWithOverriddenEncryption.AddRange(streamWithEncryption);
// Assert
Assert.IsFalse(streamWithDefaultEncryption.SequenceEqual(streamWithOverriddenEncryption));
}
public void Test_That_We_Can_Decrpyt_A_Stream_That_Was_Encrypted_With_Overridden_Encryption_Parameters()
{
// Arrange
var serializableObject = new SerializableClass { Field = "Test_That_We_Can_Decrpyt_A_Stream_That_Was_Encrypted_With_Overridden_Encryption_Parameters" };
var streamWithEncryption = new List<byte>();
var dataContractSerializer = new DataContractSerializer(serializableObject.GetType());
var serializerEncryptor = new DataContractSerializerEncrpytor(dataContractSerializer);
// Setup a mock stream for writing
var mockStreamForWriting = new Mock<Stream>();
mockStreamForWriting.SetupAllProperties();
mockStreamForWriting.SetupGet(stream => stream.CanWrite).Returns(true);
mockStreamForWriting.Setup(stream => stream.Write(It.IsAny<byte[]>(), It.IsAny<int>(), It.IsAny<int>()))
.Callback(
(byte[] buffer, int offset, int count) =>
streamWithEncryption.AddRange(buffer));
serializerEncryptor.OverrideEncryption(
new byte[] { 9, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2 },
new byte[] { 9, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 });
// Perform encryption to get encrypted byte array
serializerEncryptor.WriteObjectEncrypted(mockStreamForWriting.Object, serializableObject);
// New create a memory stream based on this, so we can pass it back into the decrpytor
var streamForReading = new MemoryStream(streamWithEncryption.ToArray());
// Act
var decryptedObject = (SerializableClass)serializerEncryptor.ReadObjectEncrypted(streamForReading);
// Assert
Assert.AreEqual(serializableObject.Field, decryptedObject.Field);
}
public void Test_That_Exception_Is_Thrown_When_Null_newEncryptionKey_Is_Passed_To_Encrpytion_Override()
{
// Arrange
var serializableObject = new SerializableClass { Field = "Field" };
var dataContractSerializer = new DataContractSerializer(serializableObject.GetType());
var serializerEncryptor = new DataContractSerializerEncrpytor(dataContractSerializer);
serializerEncryptor.OverrideEncryption(
null,
new byte[] { 9, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 });
}