快捷導(dǎo)航

c#文本加密程序代碼示例

更新時間：2013年11月29日 10:15:14 作者：

這是一個加密軟件，但只限于文本加密，加了窗口控件的滑動效果,詳細(xì)看下面的代碼

控件滾動方法：

//具體方法
//Movegroup(string u, Panel p1, Panel p2)
//Movegroup(方向<或>,被移走的控件,被移入的控件)
//注意還要添加兩個timer ：Return，Next ， Interval = 10
        public void Movegroup(string u, Panel p1, Panel p2)
        {
            if (u == ">")     //這是向右，
            {
                up1 = p1;
                up2 = p2;
                p2.Visible = true;
                p1.Enabled = false;
                p2.Enabled = false;
                Next.Enabled = true;
            }
            if (u == "<")
            {
                up1 = p1;
                up2 = p2;
                p2.Visible = true;
                p1.Enabled = false;
                p2.Enabled = false;
                Return.Enabled = true;
            }
        }
        Panel up1, up2;
        int a = 0;
        int b = -580;
        int i = 0;
        int j = 580;
        private void Next_Tick(object sender, EventArgs e)
        {
            i -= 30;
            j -= 30;
            up1.Location = new Point(i, up1.Location.Y);
            up2.Location = new Point(j, up2.Location.Y);
            if (i <= -580 || j <= 0)
            {
                Next.Enabled = false;
                up2.Enabled = true;
                up1.Enabled = false;
                up1.Visible = false;
                i = 0;
                j = 580;
            }
        }
        private void Return_Tick(object sender, EventArgs e)
        {
            a += 30;
            b += 30;
            up1.Location = new Point(a, up1.Location.Y);
            up2.Location = new Point(b, up2.Location.Y);
            if (a >= 580 || b >= 0)
            {
                Return.Enabled = false;
                up2.Enabled = true;
                up1.Visible = false;
                up1.Enabled = false;
                a = 0;
                b = -580;
            }
        }

加密原理：

密碼+問題+答案的md5 +“/”+加密后的串組成一個文本文件，（二進(jìn)制更好了）

解密原理：

先分離出文件里的密碼+問題+答案的md5在與用戶輸入的密碼+問題+答案的md5對比

如果相符則以此密碼解密文件

如果不相符則提示密碼問題及答案錯誤

我使用DES加密，這是一個類

復(fù)制代碼代碼如下:

namespace Pd_kernel
{
    public class Encrypt
    {
        /// <summary>
        /// 進(jìn)行DES加密。
        /// </summary>
        /// <param name="pToEncrypt">要加密的字符串。</param>
        /// <param name="sKey">密鑰，且必須為8位。</param>
        /// <returns>以Base64格式返回的加密字符串。</returns>
        public static string DESEncrypt(string pToEncrypt, string sKey)
        {
            using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
            {
                byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
                des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
                des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(inputByteArray, 0, inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                string str = Convert.ToBase64String(ms.ToArray());
                ms.Close();
                return str;
            }
        }

        /// <summary>
        /// 進(jìn)行DES解密。
        /// </summary>
        /// <param name="pToDecrypt">要解密的以Base64</param>
        /// <param name="sKey">密鑰，且必須為8位。</param>
        /// <returns>已解密的字符串。</returns>
        public static string DESDecrypt(string pToDecrypt, string sKey)
        {
            byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
            using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
            {
                des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
                des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(inputByteArray, 0, inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                string str = Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
                return str;
            }
        }

        public static string MD5encrypt(string text, string method)
        {
            string strMD5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(text, method);
            return strMD5;
        }
    }
}

您可能感興趣的文章: