NET上的证书固定

Question

我想将.NET应用程序限制为仅接受已知证书。那么如何在.NET上强制执行证书固定？最佳做法是什么？可以验证指纹吗？

Answer 1

https://www.owasp.org/index.php/Certificate_and_Public_Key_Pinning#.Net

这个 URL 已经有一个很好的例子。

// Encoded RSAPublicKey
private static String PUB_KEY = "30818902818100C4A06B7B52F8D17DC1CCB47362" +
    "C64AB799AAE19E245A7559E9CEEC7D8AA4DF07CB0B21FDFD763C63A313A668FE9D764E" +
    "D913C51A676788DB62AF624F422C2F112C1316922AA5D37823CD9F43D1FC54513D14B2" +
    "9E36991F08A042C42EAAEEE5FE8E2CB10167174A359CEBF6FACC2C9CA933AD403137EE" +
    "2C3F4CBED9460129C72B0203010001";

public static void Main(string[] args)
{
  ServicePointManager.ServerCertificateValidationCallback = PinPublicKey;
  WebRequest wr = WebRequest.Create("https://encrypted.google.com/");
  wr.GetResponse();
}

public static bool PinPublicKey(object sender, X509Certificate certificate, X509Chain chain,
                                SslPolicyErrors sslPolicyErrors)
{
  if (null == certificate)
    return false;

  String pk = certificate.GetPublicKeyString();
  if (pk.Equals(PUB_KEY))
    return true;

  // Bad dog
  return false;
}

Answer 2

根据OWASP，您可以使用 .NET 的ServicePointManager类实现证书和公钥固定