INNER CODE UNIT · JavaScript

checkRPID

mylofi/webauthn-local-client · src/walc.js:720

async function checkRPID(rpIDHash,origRPID) {
	var originHash = await computeSHA256Hash(
		fromUTF8String(origRPID)
	);
	return (
		rpIDHash.length > 0 &&
		rpIDHash.byteLength == originHash.byteLength &&
		rpIDHash.toString() == originHash.toString()
	);
}

function parseSignature(algoCOSE,signature) {
	if (isPublicKeyAlgorithm("ES256",algoCOSE)) {
		// this algorithm's signature comes back ASN.1 encoded, per spec:
		//   https://www.w3.org/TR/webauthn-2/#sctn-signature-attestation-types
		let der = ASN1.parseVerbose(signature);
		return new Uint8Array([ ...der.children[0].value, ...der.children[1].value, ]);
	}

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