数据加密之SymmetricAlgorithm加密

 #region SymmetricAlgorithm加密
        /// <summary>  
        /// 按指定对称算法、键和向量加密字符串  
        /// </summary>  
        public static byte[] Encrypt(string plainText, string algName, byte[] rgbKey, byte[] rgbIv)
        {
            var alg = SymmetricAlgorithm.Create(algName);
            var transform = alg.CreateEncryptor(rgbKey, rgbIv);
            var ms = new MemoryStream();
            var encStream = new CryptoStream(ms, transform, CryptoStreamMode.Write);
            var sw = new StreamWriter(encStream);
            sw.WriteLine(plainText);
            sw.Close();
            encStream.Close();
            var buffer = ms.ToArray();
            ms.Close();
            return buffer;
        }
        #endregion
        #region SymmetricAlgorithm解密
        /// <summary>  
        /// 按指定对称算法、键和向量解密数据  
        /// </summary>  
        public static string Decrypt(byte[] cypherText, string algName, byte[] rgbKey, byte[] rgbIv)
        {
            var alg = SymmetricAlgorithm.Create(algName);
            var transform = alg.CreateDecryptor(rgbKey, rgbIv);
            var ms = new MemoryStream(cypherText);
            var encStream = new CryptoStream(ms, transform, CryptoStreamMode.Read);
            var sr = new StreamReader(encStream);
            var val = sr.ReadLine();
            sr.Close();
            encStream.Close();
            ms.Close();
            return val;
        }
        #endregion