Question

有人可以提供SecurityDriven.Inferno AesCtrCryptoTransfom类的使用示例吗？

图书馆看起来非常有前景，但是我无法找到使用它的任何代码，所提供的细节对我来说还不够加密...

我正在扩展一个与许多密码完美协作的应用程序，只是它不支持AES计数器模式。对于某些SSHv2会话，我需要这个aes-128-ctr密码。该应用程序有一个非常简单的Cipher接口，适用于所有不同的密码，如下所示：

  internal interface Cipher
  {
    void Encrypt(byte[] data, int offset, int len, byte[] result, int result_offset);
    void Decrypt(byte[] data, int offset, int len, byte[] result, int result_offset);
    int BlockSize { get; }
  }

我使用AesCtrCryptoTransform创建了一个接口的实现，如下所示，但它不起作用。

public class AES128CTR : Cipher
{
  private System.Security.Cryptography.ICryptoTransform Encryptor;
  private ArraySegment<Byte> _counter;

  public AES128CTR(byte[] key, byte[] iv)
  {
    _counter = new ArraySegment<byte>(iv);
    Encryptor = new SecurityDriven.Inferno.Cipher.AesCtrCryptoTransform(key, _counter);
  }

  public int BlockSize { get { return Encryptor.InputBlockSize; } }

  public void Decrypt(byte[] data, int offset, int len, byte[] result, int result_offset)
  {
    Encryptor.TransformBlock(data, 0, len, result, 0);
  }

  public void Encrypt(byte[] data, int offset, int len, byte[] result, int   result_offset)
  {
    Encryptor.TransformBlock(data, 0, len, result, 0);
  }
}

这应该是非常容易的，我必须犯明显的错误才能解决它们。请问有什么想法吗？

Answer 1

以下是工作解决方案：

  public class AES128CTR : Cipher
  {
    private byte[] _key;
    private byte[] _iv;

    public AES128CTR(byte[] key, byte[] iv, int KeySize = 128)
    {
      this._key = key;
      this._iv = iv;
    }

    public int BlockSize { get { return _iv.Length; } }

    public void Decrypt(byte[] data, int offset, int len, byte[] result, int result_offset)
    {
      SecurityDriven.Inferno.Cipher.AesCtrCryptoTransform transformation = new SecurityDriven.Inferno.Cipher.AesCtrCryptoTransform(_key, new ArraySegment<byte>(_iv));
      using (MemoryStream ms = new MemoryStream())
      {
        using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, transformation, System.Security.Cryptography.CryptoStreamMode.Write))
        {
          cs.Write(data, offset, len);
        }
        var r = ms.ToArray();
        Array.Copy(r, result, r.Length);
      }
    }

    public void Encrypt(byte[] data, int offset, int len, byte[] result, int result_offset)
    {
      SecurityDriven.Inferno.Cipher.AesCtrCryptoTransform transformation = new SecurityDriven.Inferno.Cipher.AesCtrCryptoTransform(_key, new ArraySegment<byte>(_iv));
      using (MemoryStream ms = new MemoryStream())
      {
        using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, transformation, System.Security.Cryptography.CryptoStreamMode.Write))
        {
          cs.Write(data, offset, len);
        }
        var r = ms.ToArray();
        Array.Copy(r, result, r.Length);
      }
    }

  }

Inferno AesCtrCryptoTransform

1 个答案: