decode_asn1.py 文件源码

def _decode_user_notice(backend, un):
    explicit_text = None
    notice_reference = None

    if un.exptext != backend._ffi.NULL:
        explicit_text = _asn1_string_to_utf8(backend, un.exptext)

    if un.noticeref != backend._ffi.NULL:
        organization = _asn1_string_to_utf8(
            backend, un.noticeref.organization
        )

        num = backend._lib.sk_ASN1_INTEGER_num(
            un.noticeref.noticenos
        )
        notice_numbers = []
        for i in range(num):
            asn1_int = backend._lib.sk_ASN1_INTEGER_value(
                un.noticeref.noticenos, i
            )
            notice_num = _asn1_integer_to_int(backend, asn1_int)
            notice_numbers.append(notice_num)

        notice_reference = x509.NoticeReference(
            organization, notice_numbers
        )

    return x509.UserNotice(notice_reference, explicit_text)