./pret.py <target_ip> <ps|pjl|pcl>
If you know which protocol (ps, pjl, or pcl) is supported by the printer, try that first. Otherwise just try all 3 real quick until you get a shell on the printer.
Basic, key commands
help # list commands id # display name status # display console data ls # list file system contents get # download a file
The Print Queue
ls ls pjl ls pjl/jobs cat pjl/jobs/queue
Are things encrypted?
info variables # check to see which encryption mode is enabled nvram dump # dump the nvram of the printer, which likely has the encryption key
If an IV is required for decryption, pay attention to the encryption mode. Probably at/towards the beginning of the crypto block, maybe preceded by a length.
xxd file | head -5 # take a look at the first few lines of the file # an IV is likely to be random (i.e. not a lot of 0x00)
How is the printer setup?
info # list info categories available info config # Look at the current configuration of the printer