如何使用“System.Security.Cryptography.AesManaged"加密一个字节[]?

问题描述

基本上我想使用 System.Security.Cryptography.AesManaged (或者更好的类，如果你认为有的话?)获取一个字节数组并使用给定的对称密钥创建另一个加密字节数组(我假设我需要一个吗?).

Basically i want to use System.Security.Cryptography.AesManaged (or a better class, if you think there is one?) to take one byte array and create another encrypted byte array, using a given symmetric key (i assume i'll need one?).

我还需要逆向这个过程的方法.

I also will need the way to reverse this procedure.

这样做的目的是让我可以加密存储的密码.我认为有一种简单的方法可以做到这一点?

The point of this is so i can encrypt stored passwords. I assume there's a simple way to do this?

谢谢

推荐答案

你真的应该在每次加密时生成一个随机 IV，不像我下面的古老代码:

You really should generate a random IV each time you encrypt, unlike my ancient code below:

这是我最后所做的，灵感来自(旧版)迈克尔的回答:

Here's what i did in the end, inspired by (an older version of) michael's answer:

private string Encrypt(string input)
{
  return Convert.ToBase64String(Encrypt(Encoding.UTF8.GetBytes(input)));
}
private byte[] Encrypt(byte[] input)
{
  PasswordDeriveBytes pdb = new PasswordDeriveBytes("hjiweykaksd", new byte[] { 0x43, 0x87, 0x23, 0x72, 0x45, 0x56, 0x68, 0x14, 0x62, 0x84 });
  MemoryStream ms = new MemoryStream();
  Aes aes = new AesManaged();
  aes.Key = pdb.GetBytes(aes.KeySize / 8);
  aes.IV = pdb.GetBytes(aes.BlockSize / 8);
  CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write);
  cs.Write(input, 0, input.Length);
  cs.Close();
  return ms.ToArray();
}
private string Decrypt(string input)
{
  return Encoding.UTF8.GetString(Decrypt(Convert.FromBase64String(input)));
}
private byte[] Decrypt(byte[] input)
{
  PasswordDeriveBytes pdb = new PasswordDeriveBytes("hjiweykaksd", new byte[] { 0x43, 0x87, 0x23, 0x72, 0x45, 0x56, 0x68, 0x14, 0x62, 0x84 });
  MemoryStream ms = new MemoryStream();
  Aes aes = new AesManaged();
  aes.Key = pdb.GetBytes(aes.KeySize / 8);
  aes.IV = pdb.GetBytes(aes.BlockSize / 8);
  CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Write);
  cs.Write(input, 0, input.Length);
  cs.Close();
  return ms.ToArray();
}

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