当我们网站上的用户丢失密码并转到丢失密码页面时，我们需要给他一个新的临时密码。我并不介意这有多随机，或者它是否符合所有“所需的”强密码规则，我想做的只是给他们一个他们以后可以更改的密码。
该应用程序是用c#编写的Web应用程序。所以我想刻薄一点，走一条简单的路线，用Guid的一部分。即。
Guid.NewGuid().ToString("d").Substring(1,8)
Suggesstions吗?想法吗?
当前回答
插入一个定时器:timer1, 2个按钮:button1, button2, 1个textBox: textBox1，和一个comboBox: comboBox1。请务必申报:
int count = 0;
源代码:
private void button1_Click(object sender, EventArgs e)
{
// This clears the textBox, resets the count, and starts the timer
count = 0;
textBox1.Clear();
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
// This generates the password, and types it in the textBox
count += 1;
string possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
string psw = "";
Random rnd = new Random { };
psw += possible[rnd.Next(possible.Length)];
textBox1.Text += psw;
if (count == (comboBox1.SelectedIndex + 1))
{
timer1.Stop();
}
}
private void Form1_Load(object sender, EventArgs e)
{
// This adds password lengths to the comboBox to choose from.
comboBox1.Items.Add("1");
comboBox1.Items.Add("2");
comboBox1.Items.Add("3");
comboBox1.Items.Add("4");
comboBox1.Items.Add("5");
comboBox1.Items.Add("6");
comboBox1.Items.Add("7");
comboBox1.Items.Add("8");
comboBox1.Items.Add("9");
comboBox1.Items.Add("10");
comboBox1.Items.Add("11");
comboBox1.Items.Add("12");
}
private void button2_click(object sender, EventArgs e)
{
// This encrypts the password
tochar = textBox1.Text;
textBox1.Clear();
char[] carray = tochar.ToCharArray();
for (int i = 0; i < carray.Length; i++)
{
int num = Convert.ToInt32(carray[i]) + 10;
string cvrt = Convert.ToChar(num).ToString();
textBox1.Text += cvrt;
}
}
其他回答
我的代码的主要目标是:
弦的分布几乎是均匀的(不关心微小的偏差，只要它们很小) 它为每个参数集输出超过几十亿个字符串。如果您的PRNG只生成20亿(31位熵)不同的值，那么生成8个字符的字符串(约47位熵)是没有意义的。 它是安全的，因为我希望人们使用它作为密码或其他安全令牌。
第一个属性是通过对字母大小取一个64位值的模来实现的。对于小字母(例如问题中的62个字符)，这导致了可以忽略不计的偏差。第二个和第三个属性是通过使用RNGCryptoServiceProvider而不是System.Random来实现的。
using System;
using System.Security.Cryptography;
public static string GetRandomAlphanumericString(int length)
{
const string alphanumericCharacters =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz" +
"0123456789";
return GetRandomString(length, alphanumericCharacters);
}
public static string GetRandomString(int length, IEnumerable<char> characterSet)
{
if (length < 0)
throw new ArgumentException("length must not be negative", "length");
if (length > int.MaxValue / 8) // 250 million chars ought to be enough for anybody
throw new ArgumentException("length is too big", "length");
if (characterSet == null)
throw new ArgumentNullException("characterSet");
var characterArray = characterSet.Distinct().ToArray();
if (characterArray.Length == 0)
throw new ArgumentException("characterSet must not be empty", "characterSet");
var bytes = new byte[length * 8];
new RNGCryptoServiceProvider().GetBytes(bytes);
var result = new char[length];
for (int i = 0; i < length; i++)
{
ulong value = BitConverter.ToUInt64(bytes, i * 8);
result[i] = characterArray[value % (uint)characterArray.Length];
}
return new string(result);
}
(这是我对如何在c#中生成随机8个字符，字母数字字符串的回答的副本?)
插入一个定时器:timer1, 2个按钮:button1, button2, 1个textBox: textBox1，和一个comboBox: comboBox1。请务必申报:
int count = 0;
源代码:
private void button1_Click(object sender, EventArgs e)
{
// This clears the textBox, resets the count, and starts the timer
count = 0;
textBox1.Clear();
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
// This generates the password, and types it in the textBox
count += 1;
string possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
string psw = "";
Random rnd = new Random { };
psw += possible[rnd.Next(possible.Length)];
textBox1.Text += psw;
if (count == (comboBox1.SelectedIndex + 1))
{
timer1.Stop();
}
}
private void Form1_Load(object sender, EventArgs e)
{
// This adds password lengths to the comboBox to choose from.
comboBox1.Items.Add("1");
comboBox1.Items.Add("2");
comboBox1.Items.Add("3");
comboBox1.Items.Add("4");
comboBox1.Items.Add("5");
comboBox1.Items.Add("6");
comboBox1.Items.Add("7");
comboBox1.Items.Add("8");
comboBox1.Items.Add("9");
comboBox1.Items.Add("10");
comboBox1.Items.Add("11");
comboBox1.Items.Add("12");
}
private void button2_click(object sender, EventArgs e)
{
// This encrypts the password
tochar = textBox1.Text;
textBox1.Clear();
char[] carray = tochar.ToCharArray();
for (int i = 0; i < carray.Length; i++)
{
int num = Convert.ToInt32(carray[i]) + 10;
string cvrt = Convert.ToChar(num).ToString();
textBox1.Text += cvrt;
}
}
我使用此代码生成密码与字母，数字和非字母数字字符的平衡组合。
public static string GeneratePassword(int Length, int NonAlphaNumericChars)
{
string allowedChars = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789";
string allowedNonAlphaNum = "!@#$%^&*()_-+=[{]};:<>|./?";
string pass = "";
Random rd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < Length; i++)
{
if (rd.Next(1) > 0 && NonAlphaNumericChars > 0)
{
pass += allowedNonAlphaNum[rd.Next(allowedNonAlphaNum.Length)];
NonAlphaNumericChars--;
}
else
{
pass += allowedChars[rd.Next(allowedChars.Length)];
}
}
return pass;
}
public string Sifre_Uret(int boy, int noalfa)
{
// 01.03.2016
// Genel amaçlı şifre üretme fonksiyonu
//Fonskiyon 128 den büyük olmasına izin vermiyor.
if (boy > 128 ) { boy = 128; }
if (noalfa > 128) { noalfa = 128; }
if (noalfa > boy) { noalfa = boy; }
string passch = System.Web.Security.Membership.GeneratePassword(boy, noalfa);
//URL encoding ve Url Pass + json sorunu yaratabilecekler pass ediliyor.
//Microsoft Garanti etmiyor. Alfa Sayısallar Olabiliyorimiş . !@#$%^&*()_-+=[{]};:<>|./?.
//https://msdn.microsoft.com/tr-tr/library/system.web.security.membership.generatepassword(v=vs.110).aspx
//URL ve Json ajax lar için filtreleme
passch = passch.Replace(":", "z");
passch = passch.Replace(";", "W");
passch = passch.Replace("'", "t");
passch = passch.Replace("\"", "r");
passch = passch.Replace("/", "+");
passch = passch.Replace("\\", "e");
passch = passch.Replace("?", "9");
passch = passch.Replace("&", "8");
passch = passch.Replace("#", "D");
passch = passch.Replace("%", "u");
passch = passch.Replace("=", "4");
passch = passch.Replace("~", "1");
passch = passch.Replace("[", "2");
passch = passch.Replace("]", "3");
passch = passch.Replace("{", "g");
passch = passch.Replace("}", "J");
//passch = passch.Replace("(", "6");
//passch = passch.Replace(")", "0");
//passch = passch.Replace("|", "p");
//passch = passch.Replace("@", "4");
//passch = passch.Replace("!", "u");
//passch = passch.Replace("$", "Z");
//passch = passch.Replace("*", "5");
//passch = passch.Replace("_", "a");
passch = passch.Replace(",", "V");
passch = passch.Replace(".", "N");
passch = passch.Replace("+", "w");
passch = passch.Replace("-", "7");
return passch;
}
我创建的这个类使用RNGCryptoServiceProvider，它是灵活的。例子:
var generator = new PasswordGenerator(minimumLengthPassword: 8,
maximumLengthPassword: 15,
minimumUpperCaseChars: 2,
minimumNumericChars: 3,
minimumSpecialChars: 2);
string password = generator.Generate();
推荐文章
- 实体框架核心:在上一个操作完成之前，在此上下文中开始的第二个操作
- 如何为构造函数定制Visual Studio的私有字段生成快捷方式?
- 如何使用JSON确保字符串是有效的JSON。网
- AppSettings从.config文件中获取值
- 通过HttpClient向REST API发布一个空体
- 如何检查IEnumerable是否为空或空?
- 如何在Ruby中生成a和b之间的随机数?
- 自动化invokerrequired代码模式
- 在c#代码中设置WPF文本框的背景颜色
- 在c#中，什么是单子?
- c#和Java中的泛型有什么不同?和模板在c++ ?
- c#线程安全快速(est)计数器
- 如何将此foreach代码转换为Parallel.ForEach?
- 如何分裂()一个分隔字符串到一个列表<字符串>
- 如何转换列表<字符串>列表<int>?
