multibackend.py 文件源码

def create_x509_certificate(self, builder, private_key, algorithm):
        for b in self._filtered_backends(X509Backend):
            return b.create_x509_certificate(builder, private_key, algorithm)

        raise UnsupportedAlgorithm(
            "This backend does not support X.509.",
            _Reasons.UNSUPPORTED_X509
        )