Криптография C# AesManager

Question

У меня возник вопрос, я использую AesManager для шифрации и дешифрации строки. Условно говоря, строки на выходе это данные которые сохраняются локально. (Проект сам для себя, просто интересна тема) Так вот, покопавшись в интернете, я собрал вот такое такое чудо

private static string EncryptString(string plainText, string password)
    {
        byte[] initialVectorBytes = Encoding.ASCII.GetBytes(vector);
        byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
        byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);

        using PasswordDeriveBytes derivedPassword = new(password, saltValueBytes, hash, iterations);
        byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
        using AesManaged aes = new();
        aes.Key = keyBytes;
        aes.IV = initialVectorBytes;

        byte[] cipherTextBytes = null;

        using (ICryptoTransform encryptor = aes.CreateEncryptor(keyBytes, initialVectorBytes))
        {
            using MemoryStream memStream = new();
            using CryptoStream cryptoStream = new(memStream, encryptor, CryptoStreamMode.Write);
            cryptoStream.WriteAsync(plainTextBytes, 0, plainTextBytes.Length);
            cryptoStream.FlushFinalBlock();

            cipherTextBytes = memStream.ToArray();
        }

        return Convert.ToBase64String(cipherTextBytes);
    }

    public static string DecryptString(string cipherText, string password)
    {
        byte[] vectorBytes = Encoding.ASCII.GetBytes(vector);
        byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
        byte[] cipherTextBytes = Convert.FromBase64String(cipherText);

        using PasswordDeriveBytes passwordDeriv = new(password, saltValueBytes, hash, iterations);
        byte[] keyBytes = passwordDeriv.GetBytes(keySize / 8);
        using AesManaged aes = new();
        aes.Key = keyBytes;
        aes.IV = vectorBytes;

        byte[] plainTextBytes = new byte[cipherTextBytes.Length];
        int byteCount = 0;

        using (ICryptoTransform decryptor = aes.CreateDecryptor(keyBytes, vectorBytes))
        {
            using MemoryStream memStream = new();
            using CryptoStream cryptoStream = new(memStream, decryptor, CryptoStreamMode.Read);
            byteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
        }

        return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
    }

Проблема в том, что шифруется строка нормально, но вот при дешифровке выдается пустая строка.

iterations = 2;
keySize = 256;

hash = "SHA1";
salt = "acecraa138430d31";
vector = "2367az23cwl87xyu";

Все значения рандомные, просто для примера

Answer 1

Решил вопрос таким способом

private static string EncryptString(string plainText, string password)
    {
        byte[] initialVectorBytes = Encoding.ASCII.GetBytes(_vector);
        byte[] saltValueBytes = Encoding.ASCII.GetBytes(_salt);
        byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);

        try
        {
            using PasswordDeriveBytes derivedPassword = new(password, saltValueBytes, _hash, _iterations);

            byte[] keyBytes = derivedPassword.GetBytes(_keySize / 8);

            using (AesManaged aes = new() { Key = keyBytes, IV = initialVectorBytes })
            {
                using MemoryStream ms = new MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write, true))
                {
                    cs.Write(plainTextBytes, 0, plainTextBytes.Length);
                }
                return Convert.ToBase64String(ms.ToArray());
            }
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }

    public static string DecryptString(string cipherText, string password)
    {
        byte[] initialVectorBytes = Encoding.ASCII.GetBytes(_vector);
        byte[] saltValueBytes = Encoding.ASCII.GetBytes(_salt);
        byte[] cipherTextBytes = Convert.FromBase64String(cipherText);

        try
        {
            using MemoryStream ms = new(cipherTextBytes);
            using PasswordDeriveBytes derivedPassword = new(password, saltValueBytes, _hash, _iterations);

            byte[] keyBytes = derivedPassword.GetBytes(_keySize / 8);

            using (AesManaged aes = new() { Key = keyBytes, IV = initialVectorBytes })
            {
                byte[] plainTextBytes = new byte[cipherTextBytes.Length];
                int byteCount = 0;

                using CryptoStream cs = new(ms, aes.CreateDecryptor(), CryptoStreamMode.Read, true);
                byteCount = cs.Read(plainTextBytes, 0, plainTextBytes.Length);

                return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
            }
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }

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Криптография C# AesManager

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