68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
import socketserver
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import signal
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import os
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from Crypto.Util.number import * # type: ignore
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class Task(socketserver.BaseRequestHandler):
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def _recvall(self):
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BUFF_SIZE = 2048
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data = b''
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while True:
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part = self.request.recv(BUFF_SIZE)
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data += part
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if len(part) < BUFF_SIZE:
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break
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return data.strip()
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def send(self, msg, newline=True):
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try:
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if newline:
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msg += b'\n'
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self.request.sendall(msg)
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except:
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pass
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def recv(self, prompt=b'[-] '):
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self.send(prompt, newline=False)
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return self._recvall()
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def question(self,flag):
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p = getPrime(512)
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q = getPrime(512)
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n = p * q
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e = 65537
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phi = (p - 1) * (q - 1)
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d = inverse(e,phi)
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flag = bytes_to_long(flag)
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c = pow(flag, e, n)
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self.send(b"Here is N")
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self.send(str(n).encode())
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self.send(b"You can't decrypt this!")
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self.send(str(c).encode())
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self.send(b"OMG d leaked!")
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self.send(str(d).encode())
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def handle(self):
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signal.alarm(60)
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self.question(flag)
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class ThreadedServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
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pass
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class ForkedServer(socketserver.ForkingMixIn, socketserver.TCPServer):
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pass
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if __name__ == "__main__":
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# flag = bytes(os.getenv("FLAG"),"utf-8")
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flag = b"testflag"
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HOST, PORT = '0.0.0.0', 10001
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server = ForkedServer((HOST, PORT), Task)
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server.allow_reuse_address = True
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print(HOST, PORT)
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server.serve_forever() |