A simple, and for this purpose probably sufficiently robust, way to provide a 'checksum' is to use the MD5 of the original text concatenated with some seed text. In fact if the seed text is the source for the program you can check both the program and the config file for tampering.

True laziness is hard work

In reply to Re^2: Binary config file suggestions by GrandFather
in thread Binary config file suggestions by hushhush

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