• C#中用到的加密和解密函数


     添加

    using System.Security.Cryptography;
    using System.Text;
    using System.IO;

    //加密函数

    public static string Encode(string str, string key)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0,8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0,8));
            byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
            stream2.Write(bytes, 0, bytes.Length);
            stream2.FlushFinalBlock();
            StringBuilder builder = new StringBuilder();
            foreach (byte num in stream.ToArray())
            {
                builder.AppendFormat("{0:X2}", num);
               
            }
            stream.Close();
            return builder.ToString();
        }

    //解密函数

    public static string Decode(string str, string key)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0,8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0,8));
            byte[] buffer = new byte[str.Length / 2];
            for (int i = 0; i < (str.Length / 2); i++)
            {
                int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);
                buffer[i] = (byte)num2;
            }
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
            stream2.Write(buffer, 0, buffer.Length);
            stream2.FlushFinalBlock();
            stream.Close();
            return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());
        }

  • 相关阅读:
    常用颜色
    在VS2010中打开VS2012的项目
    vs2012 断点不能调试
    Setup Factory 打包.netframework 2.0
    Access 中数据库操作时提示from子句语法错误
    vs2012 .netFramwork2.0发布到xp
    c# access插入null值
    Visual Studio安装卸载模板
    Codeforces 455D
    ACdream 1157 (cdq分治)
  • 原文地址:https://www.cnblogs.com/ypyhy/p/2877074.html
Copyright © 2020-2023  润新知