(.NET Core C#) X509Certificate GetCertHash SHA256

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Shows how to get the SHA256 hash of a certificate.

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Chilkat.Cert cert = new Chilkat.Cert();

bool success;

// Load a certificate object with a certificate.
// The certificate object could have come from any source,
// or perhaps was obtained from another Chilkat function.
// The source does not matter.  What matters is that we have
// a cert object loaded with the certificate..
success = cert.LoadFromFile("qa_data/certs/cert_test123.cer");
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

// Get the binary DER of the certificae, and compute the SHA256 hash:
Chilkat.BinData bdDer = new Chilkat.BinData();
cert.ExportCertDerBd(bdDer);

// Get the base64 representation of the SHA256 hash.
string certHash = bdDer.GetHash("sha256","base64");

Debug.WriteLine("Certificate hash in base64 = " + certHash);