本文所述实例为使用伪随机数进行用户密码加密,这段代码为核心部分主要代码,需要配合其它的程序实现,感兴趣的读者可以自己进一步加以完善,不费话了,下面列出主要代码:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace PRanDataEncrypt { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { if (textBox3.Text != "") { if (DecryptPwd(textBox3.Text) == textBox2.Text) MessageBox.Show("用户登录成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); else MessageBox.Show("用户密码错误!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void button2_Click(object sender, EventArgs e) { textBox1.Text = textBox2.Text = textBox3.Text = string.Empty; textBox2.Focus(); } private void textBox2_TextChanged(object sender, EventArgs e) { textBox3.Text = EncryptPwd(textBox2.Text); } //定义加密用户密码所用的伪随机数 private string randStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz"; #region 使用伪随机数加密用户登录密码 ////// 使用伪随机数加密用户登录密码 /// /// 用户登录密码 ///加密后的用户登录密码 private string EncryptPwd(string str) { byte[] btData = Encoding.Default.GetBytes(str); int j, k, m; int len = randStr.Length; StringBuilder sb = new StringBuilder(); Random rand = new Random(); for (int i = 0; i/// 解密用户登录密码 /// /// 经过加密的用户登录密码 /// 解密后的用户登录密码 private string DecryptPwd(string str) { try { int j, k, m, n = 0; int len = randStr.Length; byte[] btData = new byte[str.Length / 2]; for (int i = 0; i