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【CSharp】标准的DES加密

作者:dezai / 发布于2014/8/1/ 625

DES加密


	public static string EncryptCookie(string name)//标准的DES加密 关键字、数据加密
	 {
	 //#region DES加密算法
	 if (name != "")
	 {
	 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
	 MemoryStream ms = new MemoryStream();
	 CryptoStream cs = new
	 CryptoStream(ms, cryptoProvider.CreateEncryptor(KEY_64, IV_64), CryptoStreamMode.Write);
	 StreamWriter sw = new StreamWriter(cs);
	 sw.Write(name.Replace("+", "%2B"));
	 sw.Flush();
	 cs.FlushFinalBlock();
	 ms.Flush();

	 //再转换为一个字符串
	 return Convert.ToBase64String(ms.GetBuffer(), 0, Int32.Parse(ms.Length.ToString()));
	 }
	 else
	 {
	 return "";
	 }
	 //#endregion
	 }

	 //---------------------------------解密实现部分
	 public static string DecryptCookie(string temp)//标准的DES解密
	 {
	 // DES 解密算法
	 if (temp != ""&&temp!=null)
	 {
	 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
	 //从字符串转换为字节组
	 Byte[] buffer = Convert.FromBase64String(temp);
	 MemoryStream ms = new MemoryStream(buffer);
	 CryptoStream cs = new
	 CryptoStream(ms, cryptoProvider.CreateDecryptor(KEY_64, IV_64), CryptoStreamMode.Read);
	 StreamReader sr = new StreamReader(cs);
	 return sr.ReadToEnd();
	 }
	 else
	 {
	 return "";
	 }

	 }

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