ServerCertificateValidationCallback hook not working

[achmstein]

Hello,
I tried to test ServicePointManager hooking but it never worked.

I'm trying to set ServerCertificateValidationCallback to NULL but I cannot do that. How can I achieve that?

    _fridaMonoApi.MonoApiHelper.RuntimeInvoke(setter,
    /*instance=*/
    NULL,
    /*pArgs=*/
    _fridaMonoApi.MonoApiHelper.ObjectNew(kCb)); // TODO: pArgs?

always fail

[alxbl]

Do you have a mono app that uses ServicePoint.ServerCerttificateValidationCallback? AFAIK this class is no longer exposed or used in more recent Mono versions (since the switch to .NET Core)

I also had trouble finding a working APK to debug/test this use case, so it's likely that the code has some bugs. If you have an APK that you know uses ServicePoint and are willing to share, I might be able to troubleshoot this once I have access to my lab again.

[achmstein]

Hi,
Thank you for your response. Please download the apk from the following link:

Download APK

Here is a screenshot of the class responsible for certificate pinning. It uses ServicePoint.ServerCerttificateValidationCallback

Here is a screenshot of the CertificatePinner's Pin invocation

[achmstein]

any news?