NET上的证书固定 [英] Certificate Pinning on .NET

问题描述

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?

I want to limit my .NET application to accept only known certificates. So how can I enforce certificate pinning on .NET? What is the best practice? Is it OK to just validate thumb print?

推荐答案

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

此URL已经有一个很好的例子.

This URL already has a good example.

// 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;
}

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