ASP.Net Core数据加密

这里写自定义目录标题

• 数据加密

数据加密

数据加密分为可逆和不可逆的。

可逆加密

  //默认**向量
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
        private static string DESKey = "CQYRZHXG";
        /// <summary>
        /// <summary>
        /// 加密【可逆】
        /// </summary>
        /// <param name="Text">需要加密的字符串</param>
        /// <returns></returns>
        public static string Encrypt(string Text)
        {
            return EncryptDES(Text, DESKey);
        }
        /// <summary> 
        /// 加密数据
        /// </summary> 
        /// <param name="Text"></param> 
        /// <param name="sKey"></param> 
        /// <returns></returns> 
        /// DES加密字符串
        /// </summary>
        /// <param name="encryptString">待加密的字符串</param>
        /// <param name="encryptKey">加***,要求为8位</param>
        /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
        public static string EncryptDES(string encryptString, string encryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());
            }
            catch
            {
                return encryptString;
            }
        }



        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="Text">需要解密的字符串</param>
        /// <returns></returns>
        public static string Decrypt(string Text)
        {
            if (!string.IsNullOrEmpty(Text))
            {
                return DecryptDES(Text, DESKey);
            }
            else
            {
                return "";
            }
        }
        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解***,要求为8位,和加***相同</param>
        /// <returns>解密成功返回解密后的字符串，失败返源串</returns>
        public static string DecryptDES(string decryptString, string decryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return decryptString;
            }
        }

注意：加密后的字符串可能包含‘/’或‘+’等特殊字符，所以若前端拿到后需要再次传入后台，那就需要转码【
例如：
某个请求返回加密后的数据，加密后返回的字符串为“2jsd9sdje+jxidnwmi/6==” 若直接将再次它传回台进行解密时，后台接收到的将会是“2jsd9sdje jxidnwmi/6==”，会将’+‘转为空格。所以需要进行转码：encodeURIComponent（“2jsd9sdje+jxidnwmi/6==”）这样后台接收到的就是原来的加密后的字符串了
】

不可逆加密

/// <summary>
        /// 用户密码加密【不可逆】
        /// </summary>
        /// <param name="userPwd">用户密码</param>
        /// <returns></returns>
        public string UserPwdEncrypt(string userPwd)
        {
            if (string.IsNullOrEmpty(userPwd)) userPwd = "";
             MD5 md5Hash = MD5.Create();
            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(userPwd));

            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // Return the hexadecimal string.
            return sBuilder.ToString();

        }