(精华)2020年8月13日 C#基础知识点 DES加密封装

public class DesEncrypt
    {
     
        private static byte[] _rgbKey = ASCIIEncoding.ASCII.GetBytes(Constant.DesKey.Substring(0, 8));//自定义密钥
        private static byte[] _rgbIV = ASCIIEncoding.ASCII.GetBytes(Constant.DesKey.Insert(0, "w").Substring(0, 8));//自定义密钥

        /// 

        /// DES 加密
        /// 
        /// 需要加密的值
        /// 加密后的结果
        public static string Encrypt(string text)
        {
     
            DESCryptoServiceProvider dsp = new DESCryptoServiceProvider();
            using (MemoryStream memStream = new MemoryStream())
            {
     
                CryptoStream crypStream = new CryptoStream(memStream, dsp.CreateEncryptor(_rgbKey, _rgbIV), CryptoStreamMode.Write);
                StreamWriter sWriter = new StreamWriter(crypStream);
                sWriter.Write(text);
                sWriter.Flush();
                crypStream.FlushFinalBlock();
                memStream.Flush();
                return Convert.ToBase64String(memStream.GetBuffer(), 0, (int)memStream.Length);
            }
        }

        /// 

        /// DES解密
        /// 
        /// 
        /// 解密后的结果
        public static string Decrypt(string encryptText)
        {
     
            DESCryptoServiceProvider dsp = new DESCryptoServiceProvider();
            byte[] buffer = Convert.FromBase64String(encryptText);

            using (MemoryStream memStream = new MemoryStream())
            {
     
                CryptoStream crypStream = new CryptoStream(memStream, dsp.CreateDecryptor(_rgbKey, _rgbIV), CryptoStreamMode.Write);
                crypStream.Write(buffer, 0, buffer.Length);
                crypStream.FlushFinalBlock();
                return ASCIIEncoding.UTF8.GetString(memStream.ToArray());
            }
        }
    }