Stream: show and tell

Topic: Implementation of SHA-256 and HMAC

Lachlan O'Dea (May 20 2024 at 09:50):

:wave: As a learning exercise, I implemented SHA-256 and HMAC.

Niclas Ahden (May 20 2024 at 09:59):

Awesome, I'll need HMAC in a project I'd like to build. Thank you for building and sharing! :)

Kiryl Dziamura (May 20 2024 at 10:22):

Note: we recently touched on whether cryptography is reasonable to implement in roc. The point is that it can be easily vulnerable to timing attacks. I think the recommended flow for real applications would be passing cryptography from the platform. But it depends on the use case ofc

Lachlan O'Dea (May 20 2024 at 10:31):

I don't think that's a worry for SHA, but yeah it's probably a risk for anything involving a secret.

Last updated: Jul 26 2025 at 12:14 UTC