如何使用asn1tools解码asn1十六进制值 [英] How decode asn1 hex value using asn1tools

问题描述

我正在尝试使用Python解码以下ASN1消息

I'm trying to decode the following ASN1 message using Python

b'\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x02\x89G\x11\x00\x1a\x01\x00\x10\x00\x80\x00\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x02\x98c\xc7h\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

这是我的代码:

import asn1tools
import socket
import sys

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_address = ('239.118.122.97', 8947)
#server_address = ('localhost', 8947)
#server_address = ('192.168.1.63', 8948)
#server_address = ('0.0.0.0', 8947)
print('starting up on {} port {}'.format(*server_address))
sock.bind(server_address)

while True:
    print('\nwaiting to receive message')
    data, address = sock.recvfrom(8947)

    print('\nreceived {} bytes from {}'.format(
        len(data), address))
    print(data)
    foo = asn1tools.compile_files(data,'uper')

我收到以下错误:

Traceback (most recent call last):
  File "udp.py", line 21, in <module>
    foo = asn1tools.compile_files(data,'uper')
  File "/usr/local/lib/python3.6/dist-packages/asn1tools/compiler.py", line 376, in compile_files
    return compile_dict(parse_files(filenames, encoding),
  File "/usr/local/lib/python3.6/dist-packages/asn1tools/parser.py", line 1877, in parse_files
    with open(filename, 'r', encoding=encoding, errors='replace') as fin:
OSError: [Errno 9] Bad file descriptor

我希望收到JSON格式的消息.

I expect a JSON format message.

推荐答案

快速浏览文档会发现compile_files用于编译ASN规范(看起来像是使用文件名).您似乎想在编码数据上使用它.

A quick look at the documentation indicates that compile_files is for compiling the ASN specification (looks like it takes a file name). You appear to be trying to use it on the encoded data.

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