x509.py 文件源码

def signature_algorithm_oid(self):
        alg = self._backend._ffi.new("X509_ALGOR **")
        self._backend._lib.X509_REQ_get0_signature(
            self._x509_req, self._backend._ffi.NULL, alg
        )
        self._backend.openssl_assert(alg[0] != self._backend._ffi.NULL)
        oid = _obj2txt(self._backend, alg[0].algorithm)
        return x509.ObjectIdentifier(oid)