public void TestCreateFromKeyFile()
{
string password = "******";
string wrongpassword = password + "wrong";
AesHelper aesHelper = AesHelper.CreateFromPassword(password);
byte[] keyfile = aesHelper.CreateKeyFile();
// Test wrong password
AesHelper aesHelper2;
Assert.ThrowsException <AesHelper.PasswordIncorrectException>(
() => AesHelper.CreateFromKeyFile(keyfile, wrongpassword));
// Test correct password
aesHelper2 = AesHelper.CreateFromKeyFile(keyfile, password);
Assert.IsNotNull(aesHelper2);
// NOTE: Do not test equivalent encryption, IV is random
// so multiple encryptions will return different files
// Test Equivalent decryption
byte[] data = new byte[100];
CoreTest.RandomData(data);
byte[] decrypted = aesHelper.DecryptBytes(aesHelper.EncryptBytes(data));
Assert.IsTrue(decrypted.SequenceEqual(data));
Assert.IsTrue(decrypted
.SequenceEqual(aesHelper2.DecryptBytes(aesHelper2.EncryptBytes(data))));
byte[] decrypted2 = aesHelper2.DecryptBytes(aesHelper.EncryptBytes(data));
decrypted2.SequenceEqual(data);
Assert.IsTrue(decrypted2
.SequenceEqual(aesHelper.DecryptBytes(aesHelper2.EncryptBytes(data))));
}
public void TestDecrypt()
{
AesHelper aesHelper = AesHelper.CreateFromPassword("12");
byte[] data = new byte[0];
byte[] encrypted = aesHelper.EncryptBytes(data);
byte[] decrypted = aesHelper.DecryptBytes(encrypted);
Assert.IsNotNull(decrypted);
Assert.IsTrue(encrypted.Length == decrypted.Length);
Assert.IsTrue(data.SequenceEqual(decrypted));
data = new byte[1];
CoreTest.RandomData(data);
encrypted = aesHelper.EncryptBytes(data);
decrypted = aesHelper.DecryptBytes(encrypted);
Assert.IsNotNull(decrypted);
Assert.IsTrue(encrypted.Length > decrypted.Length);
Assert.IsTrue(data.SequenceEqual(decrypted));
data = new byte[1000];
CoreTest.RandomData(data);
encrypted = aesHelper.EncryptBytes(data);
decrypted = aesHelper.DecryptBytes(encrypted);
Assert.IsNotNull(decrypted);
Assert.IsTrue(encrypted.Length > decrypted.Length);
Assert.IsTrue(data.SequenceEqual(decrypted));
}
public void TestAesHelperReconstruct()
{
string password = "******";
AesHelper aesHelper = AesHelper.CreateFromPassword(password);
byte[] keyfile = aesHelper.CreateKeyFile();
// Test correct password
AesHelper aesHelperDirect = new AesHelper(aesHelper.DataKeyKey, aesHelper.PasswordSalt, aesHelper.DataKeyKeyHash,
aesHelper.DataKeyKeyHashSalt, aesHelper.DataKeyAesProvider, aesHelper.DataKeyIV, aesHelper.DataKey);
Assert.IsNotNull(aesHelperDirect);
Assert.IsTrue(aesHelper.DataKeyKey.SequenceEqual(aesHelper.DataKeyAesProvider.Key));
Assert.IsTrue(aesHelper.DataKeyIV.SequenceEqual(aesHelper.DataKeyAesProvider.IV));
RijndaelManaged dataKeyAesProvider = AesHelper.CreateDataKeyAesProvider(aesHelper.DataKeyKey);
dataKeyAesProvider.IV = aesHelper.DataKeyIV;
byte[] decryptedAesDataKey = AesHelper.DecryptAesDataKey(aesHelper.EncryptAesDataKey(), dataKeyAesProvider);
Assert.IsTrue(decryptedAesDataKey.SequenceEqual(aesHelper.DataKey));
//AesHelper aesHelperFromFile = AesHelper.CreateFromKeyFile(keyfile, password);
AesHelper aesHelperFromFile = AesHelper.CreateFromKeyFile(aesHelper.PasswordSalt, aesHelper.DataKeyKeyHashSalt,
aesHelper.DataKeyIV, aesHelper.DataKeyKeyHash, aesHelper.EncryptAesDataKey(), password);
Assert.IsTrue(aesHelperDirect.DataKeyKey.SequenceEqual(aesHelperFromFile.DataKeyKey));
Assert.IsTrue(aesHelperDirect.PasswordSalt.SequenceEqual(aesHelperFromFile.PasswordSalt));
Assert.IsTrue(aesHelperDirect.DataKeyKeyHash.SequenceEqual(aesHelperFromFile.DataKeyKeyHash));
Assert.IsTrue(aesHelperDirect.DataKeyKeyHashSalt.SequenceEqual(aesHelperFromFile.DataKeyKeyHashSalt));
Assert.IsTrue(aesHelperDirect.DataKeyIV.SequenceEqual(aesHelperFromFile.DataKeyIV));
Assert.IsTrue(aesHelperDirect.DataKey.SequenceEqual(aesHelperFromFile.DataKey));
// NOTE: Do not test equivalent encryption, IV is random
// so multiple encryptions will return different files
// Test Equivalent decryption
byte[] data = new byte[100];
CoreTest.RandomData(data);
byte[] decrypted = aesHelper.DecryptBytes(aesHelper.EncryptBytes(data));
Assert.IsTrue(decrypted.SequenceEqual(data));
Assert.IsTrue(decrypted
.SequenceEqual(aesHelperDirect.DecryptBytes(aesHelperDirect.EncryptBytes(data))));
byte[] decrypted2 = aesHelperDirect.DecryptBytes(aesHelper.EncryptBytes(data));
decrypted2.SequenceEqual(data);
Assert.IsTrue(decrypted2
.SequenceEqual(aesHelper.DecryptBytes(aesHelperDirect.EncryptBytes(data))));
}