feat(ext/crypto) - import ECDSA/ECDH P384 PKCS8/JWK

[cryptographix]

Towards #11690.
Currently limitations in p386 crate, related to missing ProjectiveArithmetic trait, do not allow import of P384 private keys, since we must validate the key before importing. On the other hand, ring crate supports parsing PKCS#8 but does not give access to internals.

PR uses der::asn1 to implement a parser/builder for PKCS#8 EC private keys, with import_key.rs altered to import ECDSA/ECDH PKCS#8 and JWK for both P256 and P384.

[bartlomieju]

@littledivy @lucacasonato please review

[littledivy]

@seanwykes can you rebase? I'd like to land this before release on Thrusday

[cryptographix]

@seanwykes can you rebase? I'd like to land this before release on Thursday

Done.

WPT looks good.
Jose testes: 144 passed; 1 failed - due to missing P384 ECDH derive-key. @panva

After landing, need to revise WebCrypto progress issue ..

[littledivy]

LGTM! Just a tiny correction.

[panva]

@seanwykes can you rebase? I'd like to land this before release on Thursday

Done.

WPT looks good. Jose testes: 144 passed; 1 failed - due to missing P384 ECDH derive-key. @panva

After landing, need to revise WebCrypto progress issue ..

@seanwykes that's great! Shall I expect P-384 ECDH to land eventually or mark it as not supported by Deno?

[cryptographix]

@seanwykes that's great! Shall I expect P-384 ECDH to land eventually or mark it as not supported by Deno?

@panva Deno depends on an upstream package from Rust Crypto. I'm sure Deno will upgrade once they have support, but no timescales yet AFAIK.