rbudpchallenge's Introduction
Red Balloon Security's challenge To run: python3 server.py -c config.json No dependencies required Design ------ The main process creates two other processes: validator and logger process. Validator process computes UDP checksum and logger process writes checksum errors to the log after an artificial 180 second delay. The main reason for using processes is to sidestep GIL in order to handle the fast rate of udp packets. Python 3 was used because of the convenient method to transform a byte string into an int via the method int.from_bytes. Additionally, I found that multiprocessing seems to work better in Python 3 and Python 2 would hang after catching SIGTERM. Weaknesses --------- Currently, I am unable to find a way to verify the signatures. I have tried many modules including PyCrypto, M2Crypt, and rsa. I have even tried to create my own homebrew verification. I am sure that there must be a small detail I am missing; it might be the endianess or even the version of Python that I am using. Unfortunately, I have run out of time on this and need to work on my other assignments. However, my current design seems to scale pretty well and I am confident that I can incorporate signature verification into this system if I know how to do it correctly.
rbudpchallenge's People
rbudpchallenge's Issues
Calculation of CRC32 blocking main thread thereby missing udp packets
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