changes to help bindings

[max-mapper]

Hey, just wanted to mention that @mafintosh and I forked this recently to write some node bindings: https://github.com/maxogden/rabin/tree/master/src

We made some significant changes to the API to remove externs and make it memory safe across multiple instances, as well as moving most of the DEFINEs onto a struct so that they could be configurable at runtime. We didn't really touch the actual fingerprinting logic.

Relevant commits:

• dat-ecosystem-archive/rabin@2bceea3
• dat-ecosystem-archive/rabin@8461d2f
• dat-ecosystem-archive/rabin@425ba62

If you're interested in these I'd be happy to put together a PR and we could help maintain this with you.

[fd0]

Hey, thanks for contacting me! I'd be delighted if you could create a PR and we can also maintain it together.

Did you measure the performance impact of the define-to-struct change?

What do you use the chunker for in node?

Please be aware that for security-critical things there exists a fingerprinting attack that could help attackers guess what data has been processed by the chunker just by observing the size of the resulting chunks.

This was a feasibility study for my other project restic to see what throughput can be achieved with C code. For restic, I've added a generator to find custom polynomials to mitigate the fingerprinting attack. Are you also interested in that code?

[max-mapper]

Did you measure the performance impact of the define-to-struct change?

Not yet, will do

What do you use the chunker for in node?

We work on an open source data sharing tool called Dat (http://dat-data.com), we're currently implementing a sort of distributed filesystem for it. The use case for this chunker for us is very straightforward, to generate smaller deltas between two versions of a file.

security-critical things

Thanks for mentioning, I noticed the polynomial generation in your Go implementation but wasn't sure why it was there, this makes sense now. We will only be working with public scientific datasets for a while so this isn't an issue for us now. However encrypted data is on our longer term roadmap.

Also, I noticed you contribute to HackRF, thanks for that. We were at CCC this summer and got the rad1o badges and had some fun writing hackrf bindings for node: https://www.npmjs.com/package/hackrf. I just got a ANT500 last week for it actually, I'm interested in messing around with WSPR and other packet radio use cases.

[fd0]

Hey, any news on the proposed PR?

[max-mapper]

Sorry have been trying to get a release out of our project! We got some good feedback on an API improvement recently: dat-ecosystem-archive/rabin#4 Let me open an issue in that repo pointing here so we are less likely to forget