45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
import os
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import json
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import base64
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import os.path as path
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class Module:
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def __init__(self, incoming=False, verbose=False, options=None):
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# extract the file name from __file__. __file__ is proxymodules/name.py
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self.name = path.splitext(path.basename(__file__))[0]
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self.description = 'Simply print the received data as text'
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self.incoming = incoming # incoming means module is on -im chain
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self.find = None # if find is not None, this text will be highlighted
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# protocol 1: flag{m4n_1n_th3_m1ddl3_w0w}
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def execute(self, data):
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print(f"Incoming data: {data}")
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data_json = json.loads(data)
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# return handshake messages without modification
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if data_json.get("type") == "HANDSHAKE":
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return data
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# replace "Bob" with "Eve" in the first protocol message
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elif data_json.get("id") == 1:
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data_json["content"] = data_json["content"].replace("Bob","Eve")
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# if message 3 received, build valid message 4
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# instead of {Hello Alice!}_K use arbitary data
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elif data_json.get("id") == 3:
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data_json["id"] = 4
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data_json["sender"] = "Bob"
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data_json["receiver"] = "Alice"
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data_json["content"] = str(base64.b64encode(os.urandom(16)))
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# dump message
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data = json.dumps(data_json) + "\n"
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print(f"Outgoing data: {data}")
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# return crafted message to proxy
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return data
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if __name__ == '__main__':
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print('This module is not supposed to be executed alone!')
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