@mobile-wallet-protocol/client
Version:
Client SDK for the Mobile Wallet Protocol
91 lines (90 loc) • 3.25 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.KeyManager = void 0;
const cipher_1 = require("../../core/cipher/cipher");
const ScopedAsyncStorage_1 = require("../../core/storage/ScopedAsyncStorage");
const OWN_PRIVATE_KEY = {
storageKey: 'ownPrivateKey',
keyType: 'private',
};
const OWN_PUBLIC_KEY = {
storageKey: 'ownPublicKey',
keyType: 'public',
};
const PEER_PUBLIC_KEY = {
storageKey: 'peerPublicKey',
keyType: 'public',
};
class KeyManager {
constructor({ wallet }) {
this.ownPrivateKey = null;
this.ownPublicKey = null;
this.peerPublicKey = null;
this.sharedSecret = null;
this.storage = new ScopedAsyncStorage_1.ScopedAsyncStorage(wallet.name, 'KeyManager');
}
async getOwnPublicKey() {
await this.loadKeysIfNeeded();
return this.ownPublicKey;
}
// returns null if the shared secret is not yet derived
async getSharedSecret() {
await this.loadKeysIfNeeded();
return this.sharedSecret;
}
async setPeerPublicKey(key) {
this.sharedSecret = null;
this.peerPublicKey = key;
await this.storeKey(PEER_PUBLIC_KEY, key);
await this.loadKeysIfNeeded();
}
async clear() {
this.ownPrivateKey = null;
this.ownPublicKey = null;
this.peerPublicKey = null;
this.sharedSecret = null;
await Promise.all([
this.storage.removeItem(OWN_PUBLIC_KEY.storageKey),
this.storage.removeItem(OWN_PRIVATE_KEY.storageKey),
this.storage.removeItem(PEER_PUBLIC_KEY.storageKey),
]);
}
async generateKeyPair() {
const newKeyPair = await (0, cipher_1.generateKeyPair)();
this.ownPrivateKey = newKeyPair.privateKey;
this.ownPublicKey = newKeyPair.publicKey;
await this.storeKey(OWN_PRIVATE_KEY, newKeyPair.privateKey);
await this.storeKey(OWN_PUBLIC_KEY, newKeyPair.publicKey);
}
async loadKeysIfNeeded() {
if (this.ownPrivateKey === null) {
this.ownPrivateKey = await this.loadKey(OWN_PRIVATE_KEY);
}
if (this.ownPublicKey === null) {
this.ownPublicKey = await this.loadKey(OWN_PUBLIC_KEY);
}
if (this.ownPrivateKey === null || this.ownPublicKey === null) {
await this.generateKeyPair();
}
if (this.peerPublicKey === null) {
this.peerPublicKey = await this.loadKey(PEER_PUBLIC_KEY);
}
if (this.sharedSecret === null) {
if (this.ownPrivateKey === null || this.peerPublicKey === null)
return;
this.sharedSecret = await (0, cipher_1.deriveSharedSecret)(this.ownPrivateKey, this.peerPublicKey);
}
}
// storage methods
async loadKey(item) {
const key = await this.storage.getItem(item.storageKey);
if (!key)
return null;
return (0, cipher_1.importKeyFromHexString)(item.keyType, key);
}
async storeKey(item, key) {
const hexString = await (0, cipher_1.exportKeyToHexString)(item.keyType, key);
await this.storage.setItem(item.storageKey, hexString);
}
}
exports.KeyManager = KeyManager;