python腳本將ascii碼形式的文件轉換為真正的二進制文件

1、通過tcpdump在越獄手機上面抓取所有包，包含環路包

　　將手機通過USB線連接電腦，並將其映射到本地端口，啟動抓包

rvictl -s bb44203ca128c7b13bfc66fa34f6c1c9b428d0d9

ssh root@localhost -p 2222

tcpdump -s0 -i any  -w /tmp/aaa123aaa.pcap

 

2、通過wireshark分析過濾感興趣的包

3、利用python腳本將二進制文本轉換成真正的二進制數據

#!/usr/local/bin/python3
# -*- coding: utf-8 -*-
__author__ = 'qqvipfunction'
import struct

if __name__ == '__main__':
    with open('/Users/qqvipfunction/Downloads/asciihex.txt') as fp:
        list = []
        for line in fp:
            line = line.lstrip().rstrip()
            for i in range(0, len(line), 2):
                hexItem = line[i] + line[i+1]
                list.append(int(hexItem, 16))

        with open('/Users/qqvipfunction/Downloads/asciihex.plist', 'wb') as f:
            for byte in list:
                f.write(struct.pack('B', byte))