47 lines
1.2 KiB
TypeScript
47 lines
1.2 KiB
TypeScript
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import { x25519 } from "@noble/curves/ed25519";
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import {
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getCommunicationKey,
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getRemoteCommunicationKey,
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setCommunicationKey,
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setRemoteCommunicationKey,
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} from "./vars.js";
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import { queryBackground } from "./util.js";
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import { bytesToHex, hexToBytes, randomBytes } from "@lumeweb/libweb";
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import { secretbox } from "@noble/ciphers/salsa";
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export function generateCommunicationKey() {
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return x25519.utils.randomPrivateKey();
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}
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export async function exchangeCommunicationKeys() {
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if (!getCommunicationKey()) {
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setCommunicationKey(generateCommunicationKey());
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}
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const pubKey = await queryBackground(
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"exchangeCommunicationKeys",
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bytesToHex(x25519.getPublicKey(getCommunicationKey())),
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);
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if (!pubKey) {
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throw new Error("could not get communication key");
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}
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setRemoteCommunicationKey(hexToBytes(pubKey));
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}
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export async function setLoginKey(key: Uint8Array) {
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const privKey = getCommunicationKey();
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const pubKey = getRemoteCommunicationKey();
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const secret = x25519.getSharedSecret(privKey, pubKey);
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const nonce = randomBytes(24);
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const box = secretbox(secret, nonce);
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const ciphertext = box.seal(key);
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await queryBackground("setLoginKey", {
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data: bytesToHex(ciphertext),
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nonce: bytesToHex(nonce),
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});
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}
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