I have a ECDSA privateKey/publicKey and want to convert it into JWK using node.js and I am using WebCrypto API.
class KeyPair {
constructor(privateKey, publicKey) {
const algorithm = {
name: "ECDSA",
namedCurve: "P-256",
};
subtle
.importKey(
"jwk",
this.getPrivateKeyJWK(privateKey, publicKey),
algorithm,
false,
["sign"]
)
.then((res) => (this._privateKey = res));
subtle
.importKey("raw", publicKey, algorithm, false, ["verify"])
.then((res) => (this._publicKey = res));
}
getPrivateKeyJWK(privateKey, publicKey) {
let jwk = {
// this is an example jwk key, other key types are Uint8Array objects
kty: "EC",
crv: "P-256",
d: Buffer.from(privateKey)
.toString("base64")
.replace("+", "-")
.replace("/", "_"),
x: Buffer.from(publicKey.slice(1, 33))
.toString("base64")
.replace("+", "-")
.replace("/", "_"),
y: Buffer.from(publicKey.slice(33, 66))
.toString("base64")
.replace("+", "-")
.replace("/", "_"),
ext: true,
};
return jwk;
}
}However when subtle.importKey is called, I receive the following error:
node:internal/per_context/domexception:70
ErrorCaptureStackTrace(this);
^
DOMException [NotSupportedError]: Unrecognized name.
at new DOMException (node:internal/per_context/domexception:70:5)
at __node_internal_ (node:internal/util:477:10)
at normalizeAlgorithm (node:internal/crypto/util:235:9)
at SubtleCrypto.importKey (node:internal/crypto/webcrypto:471:15)
at new EcdsaWallet (./EcdsaWallet.js:<line of first subtle.importKey call>:14)
at Object.<anonymous> (./EcdsaWallet.js:<line of object creation>:14)
at Module._compile (node:internal/modules/cjs/loader:1097:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1151:10)
at Module.load (node:internal/modules/cjs/loader:975:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
The key which I want to import is a keypair of public and private key which are given as strings.