Feature request: SubtleCrypto support for RSA-PSS, ECDSA, ED25519, pkcs8 and spki

[JakeChampion]

If I could lobby for a few more algorithms to be supported 🙏

• RSA-PSS
• ECDSA (at least P-256, but ideally all three curves)
• Ed25519 from https://wicg.github.io/webcrypto-secure-curves/
• almost forgot, the goto JWS algorithm - HMAC

Also pkcs8 and spki key format import/export are not to be overlooked. Developers LOOOVE to use in favour of JWKs.

I have a comprehensive test suite for different runtimes' webcrypto implementations that I could unload on js-compute-runtime eventually.

Originally posted by @panva in https://github.com/fastly/js-compute-runtime/issues/440#issuecomment-1535339296

[jfctfl]

Would this also include RS256? 🙂 We need RS256 to be able to verify JWTs from Fanout in a c@e js runtime - for more context: https://developer.fastly.com/learning/concepts/real-time-messaging/fanout/#validating-grip-requests

[JakeChampion]

@jfctfl We support RS256, but that is not what Fanout uses, Fanout uses EC P-256, which we do not support and is already listed in this issue 👍

[jfctfl]

I assumed it was RS256 based on this rust example. But in any case, glad to see the required algorithm listed here! 👍

[guybedford]

Moved to https://github.com/bytecodealliance/StarlingMonkey/issues/123.