>Legally, saying that you took someone else's code as "source of information" would probably be seen as copyright infringement Not necessarily. There are ways

>Legally, saying that you took someone else's code as "source of information" would probably be seen as copyright infringement Not necessarily. There are ways to work around that, for example white box reverse-engineering[1]. Also there are exemptions for some use cases, like interoperability. I'm sure a lawyer could figure something out, but it looks like they didn't consult any, and didn't follow a rigorous process. [1] https://ospo.co/blog/modern-reverse-engineering/ https://ospo.co/blog/modern-reverse-engineering/ - a random link I found by googling, but presents the idea well.