|Code Listing by Simon Peverett|
I write a lot of ad-hoc protocol analysers using Python. Generally, I'm dealing with a byte stream that I want to output as a string of hex. Sometimes, I want to convert it back again. Eventually, I got round to putting the functions in a module so I wouldn't keep cut and pasting them :)
A very simple keyword encryption algorithm. Produces an encrypted string the same size as the orginal. Not very strong encryption but good enough for lightweight stuff. Works on bytes so could be used for binary streams if converted to and from...
Reads an image file from the filename specified as the 1st parameter on the command line and displays it on screen. Uses the PIL module so that it can load almost any image file type supported by that module and uses Tkinter to display the image...
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