对称加解密（未认证过）

最新推荐文章于 2021-02-02 23:04:56 发布

转载最新推荐文章于 2021-02-02 23:04:56 发布 · 753 阅读

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博客展示了对称加密和解密的代码实现。加密函数接收字符串和密钥，将字符串转为字节数组，利用DESCryptoServiceProvider进行加密；解密函数接收加密字符串和密钥，将其转换为字节数组后进行解密，最终返回解密后的字符串。

  /// <summary>
  /// 对称加密
  /// </summary>
  /// <param name="pToEncrypt"></param>
  /// <param name="sKey"></param>
  /// <returns></returns>
  public static string Encrypt(string pToEncrypt, string sKey)
  {
   DESCryptoServiceProvider des = new DESCryptoServiceProvider();

byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);

   des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
   des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
   MemoryStream ms = new MemoryStream();
   CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();

   StringBuilder ret = new StringBuilder();
   foreach(byte b in ms.ToArray())
   {
    ret.AppendFormat("{0:X2}", b);
   }


/// <summary>
  /// 对称解密
  /// </summary>
  /// <param name="pToDecrypt"></param>
  /// <param name="sKey"></param>
  /// <returns></returns>
  public static string Decrypt(string pToDecrypt, string sKey)
  {
   DESCryptoServiceProvider des = new DESCryptoServiceProvider();

   byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
   for(int x = 0; x < pToDecrypt.Length / 2; x++)
   {
    int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
    inputByteArray[x] = (byte)i;
   }

   //建立加密对象的密钥和偏移量，此值重要，不能修改
   des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
   des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
   MemoryStream ms = new MemoryStream();
   CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write);