• des的根据key进行加密和解密方法


    DES加密:

     public static string DESEncode(string content, string key)
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(content);
    
                //建立加密对象的密钥和偏移量    
                //原文使用ASCIIEncoding.ASCII方法的GetBytes方法    
                //使得输入密码必须输入英文文本    
                des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                des.IV = ASCIIEncoding.ASCII.GetBytes(key);
                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);
                }
                ret.ToString();
                return ret.ToString();
            }

    DES解密:

     public static string DESDecode(string content, string key)
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    
                byte[] inputByteArray = new byte[content.Length / 2];
                for (int x = 0; x < content.Length / 2; x++)
                {
                    int i = (Convert.ToInt32(content.Substring(x * 2, 2), 16));
                    inputByteArray[x] = (byte)i;
                }
    
                des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                des.IV = ASCIIEncoding.ASCII.GetBytes(key);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
    
                StringBuilder ret = new StringBuilder();
    
                return System.Text.Encoding.Default.GetString(ms.ToArray());
            }
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  • 原文地址:https://www.cnblogs.com/llcdbk/p/9237515.html
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