(.NET Core C#) Apple Keychain - Get Certificate by Common Name

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Retrieves the certificate from the Apple Keychain that matches the specified common name (CN).

Note: This example requires Chilkat v10.0.0 or greater.

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// On MacOS or iOS, this searches both the Default keychains and System keychains for the certificate
// having the specified CN.
Chilkat.Cert cert = new Chilkat.Cert();
bool success = cert.LoadByCommonName("Certum CA");
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

Debug.WriteLine(cert.SubjectDN);

// Note: In the Apple Keychain, a certificate with its private key represents an identity because it combines the certificate and its private key.
// When Chilkat loads a certificate from the Apple Keychain, it also gets the associated private key.
// You can simply use the cert in other places in Chilkat where a cert w/ private key is required.
Chilkat.Cert cert2 = new Chilkat.Cert();
success = cert2.LoadByCommonName("Chilkat Software, Inc.");
if (success == false) {
    Debug.WriteLine(cert2.LastErrorText);
    return;
}

Debug.WriteLine(cert2.SubjectDN);
bool hasPrivKey = cert2.HasPrivateKey();
Debug.WriteLine("Has private key: " + Convert.ToString(hasPrivKey));

Debug.WriteLine("Success.");