Journal

TPMS Encoding Progress

11 October 2019

• This week I ran LFSR16 and 64 against an input. Works fine
  • Determined we need 128b input since that's what AES will run at a minimum.
• Crypto++:
  • MAC - installed with brew (should be able to install with Apt: https://www.youtube.com/watch?v=ImG0h5sxpnQ)
  • created a file /TPMS_Encoding/CPP_Encrypt/cpp_exe.cpp ran with g++ cpp_exe.cpp -l cryptopp
    • Does generic hex encoding per https://cryptopp.com/wiki/HexEncoder
    • Moving build to Makefile

2 October 2019

• Client-server connection works
• Client seems to encode message
• Server can decode a portion of the message
• TODO:
  • Make sure the message is encoded correctly before sending
  • Check that the message is overfilling the buffers on both sides

References

• U Penn LFSR homework https://www.cis.upenn.edu/~cis110/13fa/hw/hw05/TOYEncryption.html
• 32-bit implementation https://m.eet.com/media/1142767/di2738.txt
• Carnegie-Mellon tap list: https://users.ece.cmu.edu/~koopman/lfsr/index.html