Android-Python-Communication

What does this repo do?

• C/S Structure with a Android Client and Python Server
• The Server and Client use TCP Socket to establish a communication
• Python Server
  • Get the user input and send the instructions to Client
  • Save the generated plaintext and ciphertext
• Android Client
  • Receive the instructions and do the encryption (AES/SM4)
  • return the ciphertext
• Meanwhile, a python USB listener would monitor the usb cable of the PC carrying out the Python Server
• The listener will receive 1/0 when the the client encryption algorithm started/stopped

This repo also provides testing material for Bad Power Bank Research. :-P

How does these code work

• First, please check the required environment (Python3.7/Android 10.0 SDK 29/libusb) and install the Android Client apk into your phone
• Second, plug your android phone into your computer. Then use lsusb command in terminal to remember the vid and pid of your equipment
  • Run the USBTest.py and you probably get some errors such as No compatible devices found. Also, your phone could receive a alert and you can just ignore it.
  • Don't panic and run libusb again, then you will find that the vid and pid changed (maybe 18d1 and 2d01 or 2d00)
  • Change the __init__ arguments into your vid and pid
  • Run the USBTest.py again and it should tell you the device already in the accessory mode
• Third, Run the ServerTest.py and your client app.
  • Make sure your phone and your PC are in the same local network
  • Type the private IP address and the port (default by 9090)
  • The server will tell you what to do.
• The Server Command is:
  • aes/enc/10 for running the aes encryption for 10 times
  • aes/enc for running the aes encryption for 1 time
  • stop for stop
• While your server and client are interacting, the USB listener will listen the USB data sliently