public void Encrypt_Should_Throw_Crypto_Exception_If_RSA_Public_Key_Is_Invalid()
{
byte[] fileBytes = Random.GetNumbers(2048);
asymmetricPublicKey.Modulus = new byte[1];
Assert.That(() => { HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey); }, Throws.InstanceOf(typeof(CryptoException)));
}
public void Hashing_Can_Generate_Same_Hash_For_Same_Data()
{
byte[] data = Random.GetNumbers(256);
byte[] hash1 = Hashing.HmacSha(data, key);
byte[] hash2 = Hashing.HmacSha(data, key);
CollectionAssert.AreEqual(hash1, hash2);
}
public void Hashing_Can_Generate_Hash_Of_Data()
{
byte[] data = Random.GetNumbers(256);
byte[] hash = Hashing.HmacSha(data, key);
Assert.NotNull(hash);
CollectionAssert.IsNotEmpty(hash);
}
public void Can_Recover_Encrypted_File()
{
byte[] fileBytes = Random.GetNumbers(2048);
EncryptedPacket encryptedPacket = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
byte[] decryptedBytes = HybridEncryption.Decrypt(encryptedPacket, asymmetricPublicKey);
CollectionAssert.AreEqual(fileBytes, decryptedBytes);
}
public void Encryption_Generates_Different_Hmac_Each_Time()
{
byte[] fileBytes = Random.GetNumbers(2048);
EncryptedPacket encryptedPacket1 = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
EncryptedPacket encryptedPacket2 = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
CollectionAssert.AreNotEqual(encryptedPacket1.Hmac, encryptedPacket2.Hmac);
}
public void Encryption_Generates_New_Aes_Key_Each_Time()
{
byte[] fileBytes = Random.GetNumbers(2048);
EncryptedPacket encryptedPacket1 = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
EncryptedPacket encryptedPacket2 = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
CollectionAssert.AreNotEqual(encryptedPacket1.EncryptedSessionKey, encryptedPacket2.EncryptedSessionKey);
}
public void Hashing_Generates_Different_Hash_For_Different_Data()
{
byte[] data1 = Random.GetNumbers(256);
byte[] data2 = Random.GetNumbers(256);
byte[] hash1 = Hashing.HmacSha(data1, key);
byte[] hash2 = Hashing.HmacSha(data2, key);
CollectionAssert.AreNotEqual(hash1, hash2);
}
public void Hash_Compare_Can_Compare_Hashes_Of_Equal_Length_Correctly()
{
int hashLength = 128;
byte[] hash1 = Random.GetNumbers(hashLength);
byte[] hash2 = new byte[hashLength];
Buffer.BlockCopy(hash1, 0, hash2, 0, hash1.Length);
Assert.True(Hashing.CompareHashes(hash1, hash2));
}
public void Can_Encrypt_Stream_Of_Data()
{
byte[] fileBytes = Random.GetNumbers(2048);
MemoryStream inputStream = new MemoryStream(fileBytes);
EncryptedPacket encryptedPacket = HybridEncryption.EncryptFile(inputStream, asymmetricPublicKey);
Assert.NotNull(encryptedPacket);
CollectionAssert.AreNotEqual(fileBytes, encryptedPacket.EncryptedData);
}
public void Hash_Compare_Can_Compare_Hashes_Of_Unequal_Length_Correctly()
{
int hashLength = 256;
byte[] hash1 = Random.GetNumbers(hashLength);
byte[] hash2 = new byte[hashLength - 1];
Buffer.BlockCopy(hash1, 0, hash2, 0, hashLength - 1);
Assert.False(Hashing.CompareHashes(hash1, hash2));
}
public void Decryption_Throws_CryptoException_When_Hmac_Differs()
{
byte[] fileBytes = Random.GetNumbers(2048);
EncryptedPacket encryptedPacket = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
encryptedPacket.Hmac[25] = (byte)((encryptedPacket.Hmac[25] + 1) % 255);
Assert.Throws(typeof(CryptoException), () =>
{
HybridEncryption.Decrypt(encryptedPacket, asymmetricPublicKey);
});
}
public void Can_Encrypt_Small_File()
{
byte[] fileBytes = Random.GetNumbers(256);
EncryptedPacket encryptedPacket = null;
Assert.DoesNotThrow(() =>
{
encryptedPacket = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
});
Assert.NotNull(encryptedPacket);
Assert.That(encryptedPacket.DataType, Is.EqualTo(DataType.File), "EncryptedPacket DataType property not set correctly");
}
public void Encryption_Populates_All_Packet_Fields()
{
byte[] fileBytes = Random.GetNumbers(2048);
EncryptedPacket encryptedPacket = HybridEncryption.Encrypt(DataType.File, fileBytes, asymmetricPublicKey);
Assert.NotNull(encryptedPacket.EncryptedSessionKey, "AES key not set");
CollectionAssert.IsNotEmpty(encryptedPacket.EncryptedSessionKey, "AES key not set");
Assert.NotNull(encryptedPacket.Iv, "AES IV not set");
CollectionAssert.IsNotEmpty(encryptedPacket.Iv, "AES IV not set");
Assert.NotNull(encryptedPacket.Hmac, "HMAC not set");
CollectionAssert.IsNotEmpty(encryptedPacket.Hmac, "HMAC not set");
Assert.NotNull(encryptedPacket.EncryptedData, "Encrypted data not set");
CollectionAssert.IsNotEmpty(encryptedPacket.EncryptedData, "Encrypted data not set");
}
public void Can_Decrypt_Stream()
{
// raw data
byte[] rawData = Random.GetNumbers(4096);
// encrypt with known good encryptor
byte[] encryptedBytes = SymmetricEncryption.Encrypt(rawData, key, iv);
MemoryStream encryptedMemoryStream = new MemoryStream(encryptedBytes);
// attempt to decrypt, then put decrypted stream into a memory stream and put that stream into an array
CryptoStream decryptedStream = streamer.DecryptStream(encryptedMemoryStream, CryptoStreamMode.Read);
MemoryStream decryptedMemoryStream = new MemoryStream();
decryptedStream.CopyTo(decryptedMemoryStream);
byte[] decryptedBytes = decryptedMemoryStream.ToArray();
CollectionAssert.AreEqual(rawData, decryptedBytes);
}
public async Task Can_Decrypt_Stream_Of_Data()
{
byte[] fileBytes = Random.GetNumbers(2048);
MemoryStream rawStream = new MemoryStream(fileBytes);
MemoryStream encryptedBytes = new MemoryStream();
await HybridEncryption.EncryptFile(rawStream, encryptedBytes, asymmetricPublicKey);
encryptedBytes.Position = 0;
MemoryStream decryptedStream = new MemoryStream();
bool hashOk = await HybridEncryption.DecryptFile(encryptedBytes, decryptedStream, asymmetricPublicKey);
decryptedStream.Position = 0;
byte[] decryptedBytes = decryptedStream.ToArray();
Assert.True(hashOk);
CollectionAssert.IsNotEmpty(decryptedBytes);
CollectionAssert.AreEqual(fileBytes, decryptedBytes);
}
public void SetUp()
{
key = Random.GetNumbers(32);
iv = Random.GetNumbers(16);
streamer = new SymmetricStreamer(key, iv);
}
public void Setup()
{
key = Random.GetNumbers(32);
}
