The certificate (PEM/base64 encoded).
int SetSigningCertEncoded(QByteArray qbaSigningCertEncoded);
When SigningCertEncoded is set, a search is initiated in the current SigningCertStore for the private key of the certificate. If the key is found, SigningCertSubject is updated to reflect the full subject of the selected certificate, otherwise SigningCertSubject is set to empty string.
This property is not available at design time.