C# 如何加密Textbox里的内容？

本 文转载于  http://topic.youkuaiyun.com/u/20090320/01/afc1cedc-88a9-4474-80d5-6fbfaf7bf2cc.html

 

C# 如何加密Textbox里的内容？
我把Textbox设置成密码框，但是用密码探测软件就可以读取到，请问如何加密让密码探测软件探测不到。

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private StringBuilder InputText = new StringBuilder();
  private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
  {
  InputText.Append(Convert.ToString(e.KeyChar));
  e.KeyChar = '*';
   
  }
经过测试，比较简单~

 

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http://blog.youkuaiyun.com/dreamlins/article/details/1688790

C# DES加密/解密字符串

using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;
//默认密钥向量
private static byte[] Keys = ...{ 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/**//// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
...{
    try
     ...{
        byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
        byte[] rgbIV = Keys;
        byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
         DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
         MemoryStream mStream = new MemoryStream();
         CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
        return Convert.ToBase64String(mStream.ToArray());
     }
    catch
     ...{
        return encryptString;
     }
}

/**//// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
...{
    try
     ...{
        byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
        byte[] rgbIV = Keys;
        byte[] inputByteArray = Convert.FromBase64String(decryptString);
         DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
         MemoryStream mStream = new MemoryStream();
         CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
        return Encoding.UTF8.GetString(mStream.ToArray());
     }
    catch
     ...{
        return decryptString;
     }
}