DES加密解密字符串

本文主要是介绍DES加密解密字符串，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;//引入命名空间，加密 
using System.IO;namespace DES加密_解密字符串
{/// <summary>/// DES加密解密，默认有密钥，只需传入任意的字符串密钥/// </summary>public static class DES{//默认密钥向量private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };/// <summary>/// 默认密钥/// </summary>private static string miyue = "09@/*!^-+123";#region DES加密字符串/// <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8位</param>/// <returns>加密成功返回加密后的16进制字符串，失败返回源串</returns>public static string EncryptDES(string encryptString){try{//string encryptKey加密密钥参数，我将该参数这里去掉了，用了默认密钥//byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));byte[] rgbKey = Encoding.UTF8.GetBytes(miyue);//加密密钥          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();byte[] tembyte = mStream.ToArray();StringBuilder sb = new StringBuilder();foreach (byte item in tembyte){sb.AppendFormat("{0:x2}", item);}return sb.ToString();}catch (Exception){throw;}}#endregion#region DES解密字符串/// <summary>/// DES解密字符串/// </summary>/// <param name="decryptString">待解密的16进制字符串</param>/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</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){try{//string decryptKey解密密钥参数，我将该参数这里去掉了，用了默认密钥//byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);byte[] rgbKey = Encoding.UTF8.GetBytes(miyue);//解密密钥          byte[] rgbIV = Keys;decryptString = decryptString.Replace(" ", "");decryptString = decryptString.Replace("\r\n", "");string txt16 = decryptString;byte[] inputByteArray = new byte[txt16.Length / 2];for (int i = 0; i < inputByteArray.Length; i++){inputByteArray[i] = Convert.ToByte(txt16.Substring(i * 2, 2), 16);}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 (Exception){throw;}} #endregion}
}

这篇关于DES加密解密字符串的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---