RocketChat/Rocket.Chat

import { Session } from '../Session';

export class ClientSession extends Session {
    async init(): Promise<string> {
        const sodium = await this.sodium();

        const clientKeypair = await sodium.crypto_box_keypair();
        this.secretKey = await sodium.crypto_box_secretkey(clientKeypair);
        this.publicKey = await sodium.crypto_box_publickey(clientKeypair);

        return this.publicKey.toString(this.stringFormatKey);
    }

    async setServerKey(serverPublic: string): Promise<void> {
        const sodium = await this.sodium();

        const [decryptKey, encryptKey] = await sodium.crypto_kx_client_session_keys(
            this.publicKey,
            this.secretKey,
            this.publicKeyFromString(serverPublic),
        );

        this.decryptKey = decryptKey;
        this.encryptKey = encryptKey;
    }
}