pulsar_sdk_js/pulsar_sdk_js/websocket/encryption/encryptBrowser.js

A convenient way for you to interact with Pulsar's Third Party APIs, using typified classes.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.encryptMessage = void 0;
const publicKey_1 = require("./publicKey");
async function importPublicKey(pem) {
    const pemContents = pem.replace(/-----[^-]+-----/g, '');
    const binaryDerString = window.atob(pemContents);
    const binaryDer = str2ab(binaryDerString);
    return window.crypto.subtle.importKey('spki', binaryDer, {
        name: 'RSA-OAEP',
        hash: 'SHA-256',
    }, true, ['encrypt']);
}
function str2ab(str) {
    const buf = new ArrayBuffer(str.length);
    const bufView = new Uint8Array(buf);
    for (let i = 0, strLen = str.length; i < strLen; i++) {
        bufView[i] = str.charCodeAt(i);
    }
    return buf;
}
async function encryptMessage(message) {
    const publicKey = await importPublicKey(publicKey_1.publicKeyPem);
    const enc = new TextEncoder();
    const encodedMessage = enc.encode(message);
    try {
        const encrypted = await window.crypto.subtle.encrypt({
            name: 'RSA-OAEP',
        }, publicKey, encodedMessage);
        const buffer = new Uint8Array(encrypted);
        let binary = '';
        for (let i = 0; i < buffer.byteLength; i++) {
            binary += String.fromCharCode(buffer[i]);
        }
        return Buffer.from(binary, 'binary').toString('base64');
    }
    catch (err) {
        console.error('Encryption error:', err);
        throw err;
    }
}
exports.encryptMessage = encryptMessage;