Chatto/chatto/src/main/javascript/ts/src/service/SJCLEncryptionService.ts

import { EncryptionService } from "./EncryptionService";
import * as sjcl from "sjcl";
import { MessageCipherDTO } from "../dto/MessageCipherDTO";
import PromiseWorker = require('promise-worker');
export class SJCLEncryptionService implements EncryptionService {
    private readonly _params = { mode: "gcm", ts: 128, adata: "", iter: 10000 };
    private readonly _worker = new Worker('/js/worker.js');
    // @ts-ignore
    private readonly _promiseWorker = new PromiseWorker(this._worker);

    public encrypt(passphrase: string, plainText: string): MessageCipherDTO {
        // @ts-ignore
        return JSON.parse(sjcl.encrypt(passphrase, plainText, this._params) as string) as MessageCipherDTO;
    }

    public decrypt(passphrase: string, cipher: MessageCipherDTO): string {
        return sjcl.decrypt(passphrase, JSON.stringify(cipher), undefined, undefined);
    }

    public async decryptAsPromise(passphrase: string, cipher: MessageCipherDTO): Promise<string> {
        const decrypted = await this._promiseWorker.postMessage({"passphrase": passphrase, "cipher": cipher})
        return decrypted;
    }
}