Package Description: hexio

This is a very simple package of developer utilities. They are targeted at binary/hexadecimal interaction with low-down parts of a system, so ideal for various reverse engineering tasks. In spite of their utter simplicity, they can be true life savers.

• hexin reads hexadecimal input on stdin and outputs it in binary on stdout; it will prompt with an address (or input offset) printed in hexadecimal on the tty

• hexout reads binary input on stdin and outputs it in hexadecimal form on stdout

• devio reads from stdin and passes what it finds to a given device; anything returned by the device is passed on to stdout

• llcio reads from stdin and passes what it finds to a networked device over LLC; anything returned over that LLC channel is passed on to stdout

• pcscio uses the PC/SC smart card interface to pass what it finds on stdin to a smart card as PDU codes; anything returned by that smart card is passed on to stdout

• derdump parses DER structures (distinguished ASN.1 encoding) from a file and shows the structure in great detail on stdout. Special about this utility is that it will work hard to print input that is full of errors; the utility will complain loudly, but continue instead of failing fatally; this makes it a very useful developer tool.

  Use the option --colour to get output with helpful colouring; the most important information will stand out in bold face. You can pipe it into less -R if you need a colour-friendly pager.