Performing basic mathematic operations with GUIDs regardless of its usefulness.
My theory has always been that if Guids (UUID) can be sorted (ordered) then they can be incremented. If they can be sorted and incremented then this means there is a potential attack vector for sites that expose their guids in the URL. Guids are not as obscure as people want to make them out to be and I actually don't think it's safe to expose them. If you can find two guids from a system and subtract them, then you can iterate between the two of them and the number isn't infinity like some people like to believe. This library allows me to...
- Add
- Subtract
- Multiply
- Divide
... Guids regardless of how useful it is. This is more of a theoretical exercise.
Testing guids is very difficuilt because they are very large numbers. I have done my best to test using some set theory and mostly basic algebraic concepts.
12/31/2022 Coincidentally as people are migrating from Windows docker containers to Linux docker containers due to the adoption of dot net core plus (dot net 6+) they can no longer rely on using the rpcrt4.dll which is a Windows-centric DLL. Once again, for fun, I have created a Sequential Guid generator which just utilizes the Guid Math I was working with. The performance surprised me as I wasn't expecing my library to be performant. If you are trying to generate more than one million sequential Guids at a time, then this is not the library for you. However, if it is just to generate a couple hundred it's very fast surprisingly. This is a dot net 6 library that has no dependency on Windows.