.net core 下 DES &MD5加密

項目中經常會用到加密解密，分享 DES & MD5加密，當然我們建議使用MD5.

#region DES encrypt, decrypt
        public string EncryptDES(string input, string key)
        {
            byte[] inputArray = Encoding.UTF8.GetBytes(input); var tripleDES = TripleDES.Create(); var byteKey = Encoding.UTF8.GetBytes(key); byte[] allKey = new byte[24]; Buffer.BlockCopy(byteKey, 0, allKey, 0, 16);
            Buffer.BlockCopy(byteKey, 0, allKey, 16, 8);
            tripleDES.Key = allKey;
            tripleDES.Mode = CipherMode.ECB;
            tripleDES.Padding = PaddingMode.PKCS7;
            ICryptoTransform cTransform = tripleDES.CreateEncryptor(); byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }
        public  string DecryptDES(string input, string key)
        {
            byte[] inputArray = Convert.FromBase64String(input); var tripleDES = TripleDES.Create(); var byteKey = Encoding.UTF8.GetBytes(key); byte[] allKey = new byte[24]; Buffer.BlockCopy(byteKey, 0, allKey, 0, 16);
            Buffer.BlockCopy(byteKey, 0, allKey, 16, 8);
            tripleDES.Key = allKey;
            tripleDES.Mode = CipherMode.ECB;
            tripleDES.Padding = PaddingMode.PKCS7;
            ICryptoTransform cTransform = tripleDES.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length); return Encoding.UTF8.GetString(resultArray);
        }
        #endregion

        #region ========MD5 Encrypt & Decrypt========

        /// <summary>
        /// 加密数据
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="sKey"></param>
        /// <returns></returns>
        public  string EncryptMD5(string Text, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray;
            inputByteArray = Encoding.Default.GetBytes(Text);
            des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
            des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();
            foreach (byte b in ms.ToArray())
            {
                ret.AppendFormat("{0:X2}", b);
            }
            return ret.ToString();
        }      

        /// <summary>
        /// 解密数据
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="sKey"></param>
        /// <returns></returns>
        public  string DecryptMD5(string Text, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            int len;
            len = Text.Length / 2;
            byte[] inputByteArray = new byte[len];
            int x, i;
            for (x = 0; x < len; x++)
            {
                i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
                inputByteArray[x] = (byte)i;
            }

            //参数str类型是string
           // 注：.NET Core 不支持System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");轉為函數Md5Hash(string input)
            des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
            des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            return Encoding.Default.GetString(ms.ToArray());
        }
        /// <summary>
        /// 32位MD5加密
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        private  string Md5Hash(string input)
        {
            MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
            byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
            StringBuilder sBuilder = new StringBuilder();
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }
            return sBuilder.ToString();
        }
        #endregion