public void CompareBytes_IdenticalInput_ReturnsTrue()
{
AesCryptography aes = new AesCryptography();
// Test that identical inputs will result in 'true' being returned.
Assert.IsTrue(aes.CompareBytes(Encoding.UTF8.GetBytes(BYTE_STREAM1), Encoding.UTF8.GetBytes(BYTE_STREAM_IDENTICAL_TO_STREAM1)));
}
public void CompareBytes_DifferentLengthOfArguments_ReturnsFalse()
{
AesCryptography aes = new AesCryptography();
// Test that different length of inputs will result in 'false' being returned.
Assert.IsFalse(aes.CompareBytes(Encoding.UTF8.GetBytes(BYTE_STREAM1), Encoding.UTF8.GetBytes(LONGER_BYTE_STREAM)));
}
public void CompareBytes_DifferentInputInArguments_ReturnsFalse()
{
AesCryptography aes = new AesCryptography();
// Test that different inputs will result in 'false' being returned eventhough the input length are identical.
Assert.IsFalse(aes.CompareBytes(Encoding.UTF8.GetBytes(BYTE_STREAM1), Encoding.UTF8.GetBytes(BYTE_STREAM2)));
// Test that identical inputs will result in 'true' being returned.
Assert.IsTrue(aes.CompareBytes(Encoding.UTF8.GetBytes(BYTE_STREAM1), Encoding.UTF8.GetBytes(BYTE_STREAM_IDENTICAL_TO_STREAM1)));
}
public void CreateAes_InvalidNullPasswordAndValidSalt_ThrowsArgumentException()
{
AesCryptography aes = new AesCryptography();
aes.CreateAes(null, Encoding.UTF8.GetBytes(LONG_SALT));
}
public void EncryptDecrypt_ValidPasswordSalt_AreEqual()
{
AesCryptography aes = new AesCryptography();
byte[] cipherText = aes.Encrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), Encoding.UTF8.GetBytes(CLEAR_TEXT));
byte[] inClearText = aes.Decrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), cipherText);
Assert.AreEqual(CLEAR_TEXT, Encoding.UTF8.GetString(inClearText));
try
{
// Now let's do some tampering...
cipherText[30]++;
aes.Decrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), cipherText);
Assert.Fail("The 'Decrypt' method did not throw an exception eventhough data was tamered with!");
}
catch (Exception ex)
{
Assert.IsTrue(ex is CryptographicException);
}
}
public void EncryptDecrypt_TamperingEncryptedData_ThrowsCryptographicException()
{
AesCryptography aes = new AesCryptography();
byte[] cipherText = aes.Encrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), Encoding.UTF8.GetBytes(CLEAR_TEXT));
byte[] inClearText = aes.Decrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), cipherText);
// Now let's do some tampering...
cipherText[30]++;
aes.Decrypt(SecurityIds.Password, Encoding.UTF8.GetBytes(SecurityIds.Salt), cipherText);
}
public void CreateAes_ValidPasswordAndValidSalt_ReturnsAes()
{
AesCryptography aes = new AesCryptography();
Assert.IsNotNull(aes.CreateAes(LONG_PASSWORD, Encoding.UTF8.GetBytes(LONG_SALT)));
}
public void CreateAes_ValidPasswordAndInvalidShortSalt_ThrowsArgumentException()
{
AesCryptography aes = new AesCryptography();
aes.CreateAes(LONG_PASSWORD, Encoding.UTF8.GetBytes(TO_SHORT_SALT));
}
public void CreateAes_ValidPasswordAndInvalidNullSalt_ThrowsArgumentException()
{
AesCryptography aes = new AesCryptography();
aes.CreateAes(LONG_PASSWORD, null);
}