44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
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import socket
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import base64
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import threading
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from Crypto.Cipher import AES
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flag = 'HM{3cb_0r4cl3}'
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key = '12345678abcdefgh'
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BIND_IP = '192.168.0.12'
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BIND_PORT = 8000
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def pad(raw):
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if (len(raw) % 16 == 0):
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return raw
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padding_required = 16 - (len(raw) % 16)
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padChar = b'\x00'
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data = raw.encode('ascii') + padding_required * padChar
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return data
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def handle_client(client_socket):
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client_socket.send(bytes('I will send you AES(<input>+flag):\n'.encode('ascii')))
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request = client_socket.recv(1024)
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string = request.decode('ascii').rstrip()
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cipher = AES.AESCipher(key, AES.MODE_ECB)
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ciphertext = base64.b64encode(cipher.encrypt(pad(string+flag)))
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client_socket.send(ciphertext)
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client_socket.close()
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def tcp_server():
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server = socket.socket( socket.AF_INET, socket.SOCK_STREAM)
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server.bind(( BIND_IP, BIND_PORT))
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server.listen(5)
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print("[*] Listening on %s:%d" % (BIND_IP, BIND_PORT))
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while 1:
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client, addr = server.accept()
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print("[*] Accepted connection from: %s:%d" %(addr[0], addr[1]))
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client_handler = threading.Thread(target=handle_client, args=(client,))
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client_handler.start()
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if __name__ == '__main__':
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tcp_server()
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