Get the public key bytes in DER/SubjectPublicKeyInfo format.

        Returns:
            bytes: The DER/SubjectPublicKeyInfo encoded public key.

def dump(self):
        '''
        Get the public key bytes in DER/SubjectPublicKeyInfo format.

        Returns:
            bytes: The DER/SubjectPublicKeyInfo encoded public key.
        '''
        return self.publ.public_bytes(
            encoding=c_ser.Encoding.DER,
            format=c_ser.PublicFormat.SubjectPublicKeyInfo)