加密、解密

来源：互联网发布：统一口径数据编辑：程序博客网时间：2024/04/29 20:53

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Security.Cryptography;//加密
using System.Text;

/// <summary>
/// Code 的摘要说明
/// </summary>
public class Code
{
public Code()
{
  //
  // TODO: 在此处添加构造函数逻辑
  //
}
    //3des加密
    public string Encrypt3DES(string strString)
    {
        string strKey = "malong";
        TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
        MD5CryptoServiceProvider hashMD5 = new MD5CryptoServiceProvider();

        DES.Key = hashMD5.ComputeHash(Encoding.ASCII.GetBytes(strKey));
        DES.Mode = CipherMode.ECB;

ICryptoTransform DESEncrypt = DES.CreateEncryptor();

        byte[] Buffer = Encoding.ASCII.GetBytes(strString);
        return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
    }
    //解密
    public string Decrypt3DES(string strString)
    {
        string strKey = "malong";
        TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
        MD5CryptoServiceProvider hashMD5 = new MD5CryptoServiceProvider();

        DES.Key = hashMD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strKey));
        DES.Mode = CipherMode.ECB;
        ICryptoTransform DESDecrypt = DES.CreateDecryptor();
        string result = "";
        try
        {
            byte[] Buffer = Convert.FromBase64String(strString);
            result = ASCIIEncoding.ASCII.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
        }
        catch (System.Exception e)
        {
           throw (new System.Exception("null", e));
        }
        return result;
    }
    //md5加密
    public string EncryptMD5(string str)
    {
        MD5CryptoServiceProvider hashMD5 = new MD5CryptoServiceProvider();
        string s=ASCIIEncoding.ASCII.GetString(hashMD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(str)));
        return s;
    }

}