A self hosted chat application with end-to-end encrypted messaging.
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import { EncryptionService } from "./EncryptionService"; import * as sjcl from "sjcl"; import { MessageCipherDTO } from "../../chat/dto/MessageCipherDTO"; import PromiseWorker from "promise-worker"; export class SJCLEncryptionService implements EncryptionService { private _params: sjcl.SjclCipherParams = { mode: "gcm", ts: 128, adata: "", iter: 10000 }; private readonly _promiseWorker: PromiseWorker;
constructor(promiseWorker: PromiseWorker) { this._promiseWorker = promiseWorker; }
public encrypt(passphrase: string, plainText: string): MessageCipherDTO { const fn = () => { // @ts-ignore
const cipher = sjcl.encrypt(passphrase, plainText, this._params) return cipher as unknown as string } return JSON.parse(fn()) }
public decrypt(passphrase: string, cipher: MessageCipherDTO): string { return sjcl.decrypt(passphrase, JSON.stringify(cipher)); }
public async decryptAsPromise(passphrase: string, cipher: MessageCipherDTO): Promise<string> { const decrypted = await this._promiseWorker.postMessage({ "passphrase": passphrase, "cipher": cipher }) return decrypted; } }
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