public void Test_Encrypt_WriteDifferentAmountsToStream() { var plaintext1 = RandomBytesGenerator.NextBytes(157 * 1024); var plaintext2 = RandomBytesGenerator.NextBytes(314 * 1024); var plaintext3 = RandomBytesGenerator.NextBytes(273 * 1024); var totalPlainTextLength = plaintext1.Length + plaintext2.Length + plaintext3.Length; const int numberOfWrites = 3; var expectedOutputLength = StreamHeaderLength + totalPlainTextLength + (numberOfWrites * StreamABytes); using (var outputStream = new MemoryStream()) { using (var key = XChaChaKey.Generate()) using (var encryptionStream = new XChaChaStream(outputStream, key, EncryptionMode.Encrypt)) { encryptionStream.Write(plaintext1); encryptionStream.Write(plaintext2); encryptionStream.WriteFinal(plaintext3); } var ciphertext = outputStream.ToArray(); Assert.Equal(expectedOutputLength, ciphertext.Length); } }
public void Test_Decrypt_VerifyEndOfMessage_FalseWhenPartiallyDecrypted() { using (var ciphertextStream = new MemoryStream()) using (var key = XChaChaKey.Generate()) { var plaintext1 = RandomBytesGenerator.NextBytes(1024); var plaintext2 = RandomBytesGenerator.NextBytes(1024); using (var encryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Encrypt, leaveOpen: true)) { encryptionStream.Write(plaintext1); encryptionStream.WriteFinal(plaintext2); } ciphertextStream.Position = 0; using (var decryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Decrypt)) { var decryptedPlainText = new byte[plaintext1.Length]; decryptionStream.Read(decryptedPlainText); Assert.False(decryptionStream.VerifyEndOfMessage()); } } }
public void Test_Decrypt_DecryptsTwoBlocks() { using (var ciphertextStream = new MemoryStream()) using (var key = XChaChaKey.Generate()) { const int blockLength = 128 * 1024; var block1 = RandomBytesGenerator.NextBytes(blockLength); var block2 = RandomBytesGenerator.NextBytes(blockLength); using (var encryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Encrypt, leaveOpen: true)) { encryptionStream.Write(block1); encryptionStream.WriteFinal(block2); } ciphertextStream.Position = 0; using (var decryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Decrypt)) { var decryptedBlock1 = new byte[blockLength]; var decryptedBlock2 = new byte[blockLength]; var numberOfBytesOutput1 = decryptionStream.Read(decryptedBlock1); var numberOfBytesOutput2 = decryptionStream.Read(decryptedBlock2); Assert.Equal(blockLength, numberOfBytesOutput1); Assert.Equal(block1, decryptedBlock1); Assert.Equal(blockLength, numberOfBytesOutput2); Assert.Equal(block2, decryptedBlock2); } } }
public void Test_Encrypt_EncryptsTwoBlocks() { using (var ciphertextStream = new MemoryStream()) using (var key = XChaChaKey.Generate()) { const int blockLength = 128 * 1024; var block1 = RandomBytesGenerator.NextBytes(blockLength); var block2 = RandomBytesGenerator.NextBytes(blockLength); using (var encryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Encrypt)) { encryptionStream.Write(block1); encryptionStream.WriteFinal(block2); } var ciphertext = ciphertextStream.ToArray(); const int numberOfWrites = 2; const int expectedCiphertextLength = StreamHeaderLength + 2 * blockLength + (numberOfWrites * StreamABytes); Assert.Equal(expectedCiphertextLength, ciphertext.Length); } }