Make imported RSA key extractable depending on the parameter

[jeremyVignelles]

Otherwise, imported RSA keys couldn't be made extractable

[jeremyVignelles]

Thanks for your review. Why is there an "extractable" parameter then?

I looked at the spec and it's not saying anything about detecting wether the key is public or private and actions to be taken on extractable:

https://www.w3.org/TR/WebCryptoAPI/#SubtleCrypto-method-importKey

Let format, algorithm, extractable and usages, be the format, algorithm, extractable and keyUsages parameters passed to the importKey method, respectively.

then

Set the [[extractable]] internal slot of result to extractable.

[microshine]

I was wrong

var alg = {name: "RSASSA-PKCS1-v1_5", hash: "SHA-256", publicExponent: new Uint8Array([1,0,1]), modulusLength: 2048};
crypto.subtle.generateKey(alg, false, ["sign", "verify"])
    .then((keys) => {
        console.log(keys.privateKey.extractable); // false
        console.log(keys.publicKey.extractable); // true
        return crypto.subtle.exportKey("jwk", keys.publicKey);
    })
    .then((jwk) => {
        return crypto.subtle.importKey("jwk", jwk, alg, false, ["verify"]);
    })
    .then((key) => {
        console.log(key.extractable); // false
    })

Chrome returns unextractable public key from importKey

[microshine]

@jeremyVignelles new version of webcrypto-liner is available v0.1.31