npm-package-nodejs-utils-lda/src/esm/security/key-manager.service.mjs

Este projeto tem como fins de criar e abstrair módulos basicos e utilidades para o node js

import fs from 'fs';
import path from 'path';
import { generateKeyPairSync } from 'crypto';

const KEYS_DIR = path.resolve('./bk-keys');
const PRIVATE_KEY_PATH = path.join(KEYS_DIR, 'private.pem');
const PUBLIC_KEY_PATH = path.join(KEYS_DIR, 'public.pem');

/**
 * Garante que o par de chaves RSA exista no sistema
 *
 * @returns {{ privateKeyPem: string, publicKeyPem: string }}
 */
export function ensureRSAKeys() {
  if (!fs.existsSync(KEYS_DIR)) {
    fs.mkdirSync(KEYS_DIR, { recursive: true });
  }

  const hasPrivate = fs.existsSync(PRIVATE_KEY_PATH);
  const hasPublic = fs.existsSync(PUBLIC_KEY_PATH);

  if (!hasPrivate || !hasPublic) {
    const { publicKey, privateKey } = generateKeyPairSync('rsa', {
      modulusLength: 2048,
      publicKeyEncoding: { type: 'spki', format: 'pem' },
      privateKeyEncoding: { type: 'pkcs8', format: 'pem' }
    });

    fs.writeFileSync(PRIVATE_KEY_PATH, privateKey);
    fs.writeFileSync(PUBLIC_KEY_PATH, publicKey);

    if (!fs.existsSync('public')) {
      fs.mkdirSync('public');
    }
    fs.writeFileSync('public/public.pem', publicKey);

    console.log('🔐 Chaves RSA geradas automaticamente');
  }

  return {
    privateKeyPem: fs.readFileSync(PRIVATE_KEY_PATH, 'utf8'),
    publicKeyPem: fs.readFileSync(PUBLIC_KEY_PATH, 'utf8')
  };
}