var test = async () => {
try {
var mode = document.querySelector('input[name="keyUsages"]:checked').value;
var keyUsages = (mode === "wrap") ? ["wrapKey"] : ["wrapKey", "unwrapKey"]
// Create RSA key pair
var RSAKeys = await crypto.subtle.generateKey(
{name: "RSA-OAEP", modulusLength: 3072, publicExponent: new Uint8Array([0x01, 0x00, 0x01]), hash: {name: "SHA-256"}},
true,
keyUsages);
// Create key to wrap
var keyToWrap = await window.crypto.subtle.generateKey(
{name: "AES-GCM", length: 128},
true,
["encrypt", "decrypt"]);
// Wrap key
var wrappedKey = await window.crypto.subtle.wrapKey(
"raw",
keyToWrap,
RSAKeys.publicKey,
{name: "RSA-OAEP", hash: {name: "SHA-256"}});
// Unwrap key
var unwrappedKey = await window.crypto.subtle.unwrapKey(
"raw",
wrappedKey,
RSAKeys.privateKey,
{name: "RSA-OAEP", modulusLength: 3072, publicExponent: new Uint8Array([0x01, 0x00, 0x01]), hash: {name: "SHA-256"}},
{name: "AES-GCM", length: 128},
false,
["encrypt", "decrypt"]);
document.getElementById("result").innerHTML = "Secret key for " + unwrappedKey.algorithm.name + " unwrapped.";
console.log(unwrappedKey);
} catch(e) {
document.getElementById("result").innerHTML = e.name + ": " + e.message;
}
}
.as-console-wrapper { max-height: 7.0em !important; }
<!DOCTYPE html>
<html>
<body height="200">
<input type="radio" name="keyUsages" value="wrap" checked="true"> ["wrapKey"]
<input type="radio" name="keyUsages" value="wrapUnwrap"> ["wrapKey", "unwrapKey"]
<button onclick="test()">Run</button><br/>
<p id="result"></p>
</body>
</html>
