multibackend.py 文件源码

def dsa_parameters_supported(self, p, q, g):
        for b in self._filtered_backends(DSABackend):
            return b.dsa_parameters_supported(p, q, g)
        raise UnsupportedAlgorithm("DSA is not supported by the backend.",
                                   _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM)