之前写过一篇DES的博客是关于.Net framework的, 经测试，那篇博客在.NET Core中并不适用，下面我就展示如何在.NET core中使用DES加密和解密
/// <summary> /// DES加密字符串 /// </summary> /// <param name="encryptString">待加密的字符串</param> /// <param name="encryptKey">加密密钥,要求为16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 key) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(key); //用于对称算法的初始化向量（默认值）。 byte[] rgbIV = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F }; byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); Aes dCSP = Aes.Create(); 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 (Exception ex) { throw ex; } } /// <summary> /// DES解密字符串 /// </summary> /// <param name="decryptString">待解密的字符串</param> /// <param name="key">解密密钥，要求16位</param> /// <returns></returns> public static string DecryptDES(string decryptString, string key) { try { //用于对称算法的初始化向量（默认值） byte[] Keys = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F }; byte[] rgbKey = Encoding.UTF8.GetBytes(key); byte[] rgbIV = Keys; byte[] inputByteArray = Convert.FromBase64String(decryptString); Aes DCSP = Aes.Create(); 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 (Exception ex) { return decryptString; } }文章来源: DES对称加密算法在.NET Core中的使用