✨ support for crypto.hkdf() / crypto.hkdfSync()

[shashibheemanapally]

What feature or enhancement are you suggesting?

Hello, I would like to request support for HKDF operations. Thanks!

Pros:
HKDF is the recommended KDF for deriving symmetric keys from ECDH shared secrets

Also attaching open issue link for ECDH feature request

What Platforms whould this feature/enhancement affect?

iOS, Android

Alternatives/Workarounds

I am currently using all Javascript library noble-hashes to derive symmetric keys for given ECDH shared secret.

import { hkdf } from "@noble/hashes/hkdf.js";
import { sha256 } from "@noble/hashes/sha2.js";

...
const aliceDerivedAesKey = hkdf(sha256, aliceSharedSecret, salt, info, 32);
...

Additional information

• I agree to follow this project's Code of Conduct
• I searched for similar feature requests in this repository and found none.

[notkadez]

This would be amazing! I am also using noble-hashes, and a native implementation would be great.

[athexweb3]

@boorad I am working on adding hkdf support

[boorad]

@boorad I am working on adding hkdf support

LFG 🚀

[boorad]

@athexweb3 add to the benchmark suite 🙏

[boorad]

@athexweb3 add to the benchmark suite 🙏

[athexweb3]

ok I will make sure to add on benchmark from now.

[athexweb3]

Added support for HKDF in #848 .

issues can be closed now - @boorad

[XChikuX]

Do we have support for HKDFExpand as well?