Passwords, How Do They Work?, on ECU C (Intermediary Flag)

Open Boss Challenges - Toyota RAMN Board

2000 points

Challenge description

ECU C is waiting for a 16-byte password on I2C2. You can write 16 bytes and read up to 25 bytes (trying to read/write more bytes may lock up the device until reset). The first byte that you can read corresponds to your current security level, the other bytes are used to send you unlocked flags.