Simple steganography script for hiding files and messages in images.
This program was made parially as a challange for OpenAI Codex, to measure the limits of the models knowledge. The code has been rewritten and improved by hand to make the program as stable as possible.
> python simsteg.py -h
usage: simsteg.py [-h] [-o OUTPUT] [-v] [-f FILE] [-t TEXT] [-d] input
A tool that takes an JPG or PNG image as input, hides some data in it and saves the new modified image.
positional arguments:
input The input image file.
optional arguments:
-h, --help show this help message and exit
-o OUTPUT, --output OUTPUT
The output image file to be created.
-v, --verbose Output more information about the process.
-f FILE, --file FILE The file to be hidden in the input image file.
-t TEXT, --text TEXT The text to be hidden in the input image file.
-d, --decode Decode the input image file.
> python simsteg.py image.png -d
--- Text 1 Start ---
Hello, beautiful
world!
---- Text 1 End ----
The file 'nested_image.jpg' already exists. Do you want to overwrite it? (y/n): y
Successfully extracted file 'nested_image.jpg'! (119088 bytes)
Done decoding, 1 hidden text message(s) and 1 hidden file(s) were found.
> python simsteg.py source.png -f nested.png -o dest.png
File was hidden in the image file. (130865 bytes)
The modified image was successfully saved to dest.png
Download the image of a kitten below together with the script from above.
Your task is to decode the contents of this file.
