本文介绍了如何在 C# 中创建受密码保护的文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
与 这个问题.
如何创建受密码保护的文件?
How to create a password protected file?
推荐答案
加密:
private const int SaltSize = 8;
public static void Encrypt( FileInfo targetFile, string password )
{
var keyGenerator = new Rfc2898DeriveBytes( password, SaltSize );
var rijndael = Rijndael.Create();
// BlockSize, KeySize in bit --> divide by 8
rijndael.IV = keyGenerator.GetBytes( rijndael.BlockSize / 8 );
rijndael.Key = keyGenerator.GetBytes( rijndael.KeySize / 8 );
using( var fileStream = targetFile.Create() )
{
// write random salt
fileStream.Write( keyGenerator.Salt, 0, SaltSize );
using( var cryptoStream = new CryptoStream( fileStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write ) )
{
// write data
}
}
}
并解密:
public static void Decrypt( FileInfo sourceFile, string password )
{
// read salt
var fileStream = sourceFile.OpenRead();
var salt = new byte[SaltSize];
fileStream.Read( salt, 0, SaltSize );
// initialize algorithm with salt
var keyGenerator = new Rfc2898DeriveBytes( password, salt );
var rijndael = Rijndael.Create();
rijndael.IV = keyGenerator.GetBytes( rijndael.BlockSize / 8 );
rijndael.Key = keyGenerator.GetBytes( rijndael.KeySize / 8 );
// decrypt
using( var cryptoStream = new CryptoStream( fileStream, rijndael.CreateDecryptor(), CryptoStreamMode.Read ) )
{
// read data
}
}
这篇关于如何在 C# 中创建受密码保护的文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除！