public void TestRandomBytes(Symmetric_AES.KeySize keySize, int?numBytes) { var key = Symmetric_AES.GenerateRandomKey(keySize); byte[] input = null; if (numBytes.HasValue) { input = GetRandomBytes(numBytes.Value, numBytes.Value); } byte[] encrypted, decrypted; using (var algorithm = new Symmetric_AES_CBC()) { encrypted = algorithm.EncryptBytes(input, key); } using (var algorithm = new Symmetric_AES_CBC()) { decrypted = algorithm.DecryptBytes(encrypted, key); } if (input == null) { Assert.IsNull(encrypted, "encrypted"); Assert.IsNull(decrypted, "decrypted"); } else { Assert.IsTrue(encrypted.Length >= numBytes, "encrypted.Length"); Assert.IsTrue(decrypted.SequenceEqual(input), "Decrypted does not match original."); } }
public void TestIncorrectKeyFails(Symmetric_AES.KeySize keySize) { var key = Symmetric_AES.GenerateRandomKey(keySize); byte[] input = GetRandomBytes(1000, 5000); byte[] encrypted; using (var algorithm = new Symmetric_AES_CBC()) { encrypted = algorithm.EncryptBytes(input, key); } key = Symmetric_AES.GenerateRandomKey(keySize); using (var algorithm = new Symmetric_AES_CBC()) { algorithm.DecryptBytes(encrypted, key); } }
public void TestSameInputProducesDifferentOutput(Symmetric_AES.KeySize keySize) { var key = Symmetric_AES.GenerateRandomKey(keySize); for (int counter = 0; counter < 10; ++counter) { var encryptedAsBase64 = new HashSet <string>(); using (var algorithm = new Symmetric_AES_CBC()) { var inputBytes = GetRandomBytes(1024, 4096); for (int i = 0; i < 100; ++i) { encryptedAsBase64.Add(Convert.ToBase64String(algorithm.EncryptBytes(inputBytes, key))); } } Assert.AreEqual(100, encryptedAsBase64.Count, "Should be 100 distinct values"); } }
public void TestUnicodeString(Symmetric_AES.KeySize keySize) { var key = Symmetric_AES.GenerateRandomKey(keySize); string input = Convert.ToBase64String(SecureRandomizer.GetRandomBytes(100)) + "\u01e2\u01f0\u020e\u0229"; byte[] encrypted; string decrypted; using (var algorithm = new Symmetric_AES_CBC()) { encrypted = algorithm.EncryptString(input, key); } using (var algorithm = new Symmetric_AES_CBC()) { Assert.IsTrue(encrypted.Length > 100, "encrypted.Length"); decrypted = algorithm.DecryptBytes(encrypted, key).AsString(); } Assert.AreEqual(input, decrypted, string.Format("{0} | {1}", input, decrypted)); }
public void TestRandomStream(Symmetric_AES.KeySize keySize, int?numBytes) { var key = Symmetric_AES.GenerateRandomKey(keySize); byte[] input = null; if (numBytes.HasValue) { input = GetRandomBytes(numBytes.Value, numBytes.Value); } byte[] encrypted = null; using (var inputStream = numBytes.HasValue ? new MemoryStream(input) : null) { using (var outputStream = numBytes.HasValue ? new MemoryStream() : null) { using (var algorithm = new Symmetric_AES_CBC()) { try { algorithm.EncryptStream(inputStream, outputStream, key); if (numBytes.HasValue) { encrypted = outputStream.ToArray(); Assert.IsTrue(encrypted.Length >= numBytes, "encrypted.Length"); } else { Assert.Fail("Should have thrown exception"); } } catch (Exception ex) { if (numBytes.HasValue) { Assert.Fail("Should not have thrown exception"); } else { Assert.AreEqual(typeof(ArgumentNullException), ex.GetType(), "Exception type"); } } } } } using (var inputStream = numBytes.HasValue ? new MemoryStream(encrypted) : null) { using (var outputStream = numBytes.HasValue ? new MemoryStream() : null) { using (var algorithm = new Symmetric_AES_CBC()) { algorithm.DecryptStream(inputStream, outputStream, key); } if (numBytes.HasValue) { byte[] decrypted = outputStream.ToArray(); Assert.IsTrue(decrypted.SequenceEqual(input), "Decrypted does not match original."); } else { Assert.IsNull(inputStream, "inputStream"); Assert.IsNull(outputStream, "outputStream"); } } } }