pythonchallenge Level 26

第26关地址:http://www.pythonchallenge.com/pc/hex/decent.html

查看源码

标题:be a man - apologize!

提示:

you've got his e-mail

Hurry up, I'm missing the boat

apologize,e-mail 想到第19关发邮件得到的回复

发邮件sorry给leopold.moz@pythonchallenge.com
得到回复:
Never mind that.
Have you found my broken zip?
md5: bbb8b499a0eef99b52c7f13f4e78c24b
Can you believe what one mistake can lead to?

根据回复信息

想到第24关获得的mybroken.zip,里面的mybroken.gif打不开,是有一个字节错了

按照邮件里面的md5码,修复这个zip包

不清楚是哪个字节损坏,循环替换修复验证,当md5相等时修复完成。

from hashlib import md5

data = open('mybroken.zip', 'rb').read()

for i in range(len(data)):
    for c in range(256):
        newChr = chr(c).encode('latin1')
        mistake = chr(data[i]).encode('latin1')
        new_data = data[:i] + newChr + data[i + 1:]
        md5value = md5(new_data).hexdigest()
        if md5value == 'bbb8b499a0eef99b52c7f13f4e78c24b':
            print('损坏位置: ', i, '损坏字节:', mistake, '修复字节: ', newChr)
            with open('repaired.zip', 'wb') as f:
                f.write(new_data)
            print('mybroken.zip 修复完成,新文件 repaired.zip! ')
            break

得到一个新的压缩包,解压得到mybroken.gif

 

打开:http://www.pythonchallenge.com/pc/hex/speed.html

 

 

根据提示Hurry up, I'm missing the boat

得到speedboat

 

获得下一关地址:http://www.pythonchallenge.com/pc/hex/speedboat.html

posted @ 2021-12-07 10:03  OTAKU_nicole  阅读(64)  评论(0编辑  收藏  举报