How to find in store the certificate I need?

Question

For one of my applications I am developing against the TeleCashAPI (Internet Payment Gateway). I need to send a client certificate (p12) on each call.

Until now I have loaded the Client Certificate via Filesystem

public void AddCertificate(X509Certificate certificate)
{
    WebRequest.ClientCertificates.Add(certificate);
}

Now my customer want to have it more generic. It should be installed on the client machine (which is talking to this api). I still know what is the password, but I don't know the certificate.

How can I get the Certificate?

From this answer, I see how I can get the whole list:

X509Store store = new X509Store("My");

store.Open(OpenFlags.ReadOnly);

foreach (X509Certificate2 mCert in store.Certificates){
    //TODO's
}

But how I find the certificate I specificly want to have? Is this even posssible?

I am realy new to this topic.

To be a little bit more clear:

The certificate is installed by doubleclick. I can not controll this process. My Task is, to find the certificate, which is for TeleCash.

score 3 · Accepted Answer · edited Sep 08 '15 at 12:54

3

To know certificate hash - double click on certificate -> details -> Thumbprint

foreach (X509Certificate2 mCert in store.Certificates)
{
    if(mCert.Thumbprint.ToLower()=="Your Certificat hash")
    {
        //TODO
    }
}

edited Sep 08 '15 at 12:54

Christian Gollhardt

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answered Sep 08 '15 at 12:29

Narek Arzumanyan

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How do I get the Certificate Hash? I only now, that someone have installed the certificate, but has no controlling about, how it is installed. I only now, it must be a certificate, which is signed for TeleCash. – Christian Gollhardt Sep 08 '15 at 12:33
1

to know certificate hash - double click on certificate -> details -> Thumbprint – Narek Arzumanyan Sep 08 '15 at 12:51
Ah okay, thank you very much. I think this should be communicateable. – Christian Gollhardt Sep 08 '15 at 12:52

How to find in store the certificate I need?

1 Answers1