naruyaizumi
Version:
A WebSockets library for interacting with WhatsApp Web
41 lines (40 loc) • 1.85 kB
JavaScript
import * as keyhelper from "./keyhelper.js";
import { SenderKeyDistributionMessage } from "./sender-key-distribution-message.js";
import { SenderKeyName } from "./sender-key-name.js";
import { SenderKeyRecord } from "./sender-key-record.js";
export class GroupSessionBuilder {
constructor(senderKeyStore) {
this.senderKeyStore = senderKeyStore;
}
async process(senderKeyName, senderKeyDistributionMessage) {
const senderKeyRecord = await this.senderKeyStore.loadSenderKey(senderKeyName);
senderKeyRecord.addSenderKeyState(
senderKeyDistributionMessage.getId(),
senderKeyDistributionMessage.getIteration(),
senderKeyDistributionMessage.getChainKey(),
senderKeyDistributionMessage.getSignatureKey()
);
await this.senderKeyStore.storeSenderKey(senderKeyName, senderKeyRecord);
}
async create(senderKeyName) {
const senderKeyRecord = await this.senderKeyStore.loadSenderKey(senderKeyName);
if (senderKeyRecord.isEmpty()) {
const keyId = keyhelper.generateSenderKeyId();
const senderKey = keyhelper.generateSenderKey();
const signingKey = keyhelper.generateSenderSigningKey();
senderKeyRecord.setSenderKeyState(keyId, 0, senderKey, signingKey);
await this.senderKeyStore.storeSenderKey(senderKeyName, senderKeyRecord);
}
const state = senderKeyRecord.getSenderKeyState();
if (!state) {
throw new Error("No session state available");
}
return new SenderKeyDistributionMessage(
state.getKeyId(),
state.getSenderChainKey().getIteration(),
state.getSenderChainKey().getSeed(),
state.getSigningKeyPublic()
);
}
}
//# sourceMappingURL=group-session-builder.js.map