C#加密，解密

最新推荐文章于 2024-09-05 10:50:38 发布

翻译最新推荐文章于 2024-09-05 10:50:38 发布 · 130 阅读

文章标签：

#C#

本文详细介绍了如何使用C#实现DES加密和解密算法。通过具体的代码示例，展示了如何设置密钥和初始化向量，创建加密服务提供者，进行数据的加密和解密过程，并将加密后的数据转换为Base64字符串形式。此外，还提供了处理特殊字符替换的解密方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

///解密

  public static string _KEY = "HQDCKEY1";  //密钥  
		public static string _IV = "HQDCKEY2";   //向量  
		public static string Encode(string data)
		{
			byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(_KEY);
			byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(_IV);
			DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
			int i = cryptoProvider.KeySize;
			MemoryStream ms = new MemoryStream();
			CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
			StreamWriter sw = new StreamWriter(cst);
			sw.Write(data);
			sw.Flush();
			cst.FlushFinalBlock();
			sw.Flush();
			string strRet = Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
			return strRet;
		}


 
///解密	
 	public static string _KEY = "HQDCKEY1";  //密钥  ``
		public static string _IV = "HQDCKEY2";   //向量  
		public static string Decode(string data)
		{
			byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(_KEY);
			byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(_IV);
			byte[] byEnc;
			try
			{
				data.Replace("_%_", "/");
				data.Replace("-%-", "#");
				byEnc = Convert.FromBase64String(data);
			}
			catch
			{
				return null;
			}
			DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
			MemoryStream ms = new MemoryStream(byEnc);
			CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
			StreamReader sr = new StreamReader(cst);
			return sr.ReadToEnd();
		}