c# - 使用密钥加密和解密的简单方法

Question

我正在寻找一种简单的方法来使用固定密钥（将存储在我的配置中）加密和解密某些数据并将结果存储为字符串（base16 或十六进制）。

就像是

string myString = "hello world";
string myKey = "k2k3aij3h";
string enc = new Algorithm().Encrypt(myString, myKey);
string dec = new Alrorithm().Decrypt(enc, myKey);

Answer 1

尝试这个

       private const string initVector = "tu89geji340t89u2";

        private const int keysize = 256;

        public static string Encrypt(string Text, string Key)
        {
            byte[] initVectorBytes = Encoding.UTF8.GetBytes(initVector);
            byte[] plainTextBytes = Encoding.UTF8.GetBytes(Text);
            PasswordDeriveBytes password = new PasswordDeriveBytes(Key, null);
            byte[] keyBytes = password.GetBytes(keysize / 8);
            RijndaelManaged symmetricKey = new RijndaelManaged();
            symmetricKey.Mode = CipherMode.CBC;
            ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes);
            MemoryStream memoryStream = new MemoryStream();
            CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);
            cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
            cryptoStream.FlushFinalBlock();
            byte[] Encrypted = memoryStream.ToArray();
            memoryStream.Close();
            cryptoStream.Close();
            return Convert.ToBase64String(Encrypted);
        }

        public static string Decrypt(string EncryptedText, string Key)
        {
            byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
            byte[] DeEncryptedText = Convert.FromBase64String(EncryptedText);
            PasswordDeriveBytes password = new PasswordDeriveBytes(Key, null);
            byte[] keyBytes = password.GetBytes(keysize / 8);
            RijndaelManaged symmetricKey = new RijndaelManaged();
            symmetricKey.Mode = CipherMode.CBC;
            ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes);
            MemoryStream memoryStream = new MemoryStream(DeEncryptedText);
            CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
            byte[] plainTextBytes = new byte[DeEncryptedText.Length];
            int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
            memoryStream.Close();
            cryptoStream.Close();
            return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
        }

它来自这里