pyopenssl解析国密证书

发表于 更新于 分类于 阅读次数： 本文字数： 700 阅读时长 ≈ 1 分钟

获取算法名称

def get_signature_algorithm(self):
    """
    Return the signature algorithm used in the certificate.

    :return: The name of the algorithm.
    :rtype: :py:class:`bytes`

    :raises ValueError: If the signature algorithm is undefined.

    .. versionadded:: 0.13
    """
    algor = _lib.X509_get0_tbs_sigalg(self._x509)
    nid = _lib.OBJ_obj2nid(algor.algorithm)
    if nid == _lib.NID_undef:
        # https://bugs.python.org/issue30502
        # 这里用Python3.7 会找不到OBJ_obj2txt，换Python3.8或3.9就可以
        buf = bytes(20)
        if _lib.OBJ_obj2txt(bytes(buf), len(buf), algor.algorithm, 0) > 0:
            return buf
        raise ValueError("Undefined signature algorithm")
    return _ffi.string(_lib.OBJ_nid2ln(nid))

修改后可以返回b'SM2-with-SM3'

转载：https://blog.csdn.net/javajiawei/article/details/116569515

其他资料：https://bugs.python.org/issue30502