cloudron-box/src/blobs.js

/* jslint node:true */

'use strict';

exports = module.exports = {
    get,
    set,
    del,

    generateSecrets,
    restoreSecrets,

    ACME_ACCOUNT_KEY: 'acme_account_key',
    ADDON_TURN_SECRET: 'addon_turn_secret',
    DHPARAMS: 'dhparams',
    SFTP_PUBLIC_KEY: 'sftp_public_key',
    SFTP_PRIVATE_KEY: 'sftp_private_key',

    CERT_PREFIX: 'cert',

    _clear: clear
};

const assert = require('assert'),
    BoxError = require('./boxerror.js'),
    database = require('./database.js'),
    debug = require('debug')('box:blobs'),
    paths = require('./paths.js'),
    safe = require('safetydance');

const BLOBS_FIELDS = [ 'id', 'value' ].join(',');

async function get(id) {
    assert.strictEqual(typeof id, 'string');

    const result = await database.query(`SELECT ${BLOBS_FIELDS} FROM blobs WHERE id = ?`, [ id ]);
    if (result.length === 0) return null;
    return result[0].value;
}

async function set(id, value) {
    assert.strictEqual(typeof id, 'string');
    assert(value === null || Buffer.isBuffer(value));

    await database.query('INSERT INTO blobs (id, value) VALUES (?, ?) ON DUPLICATE KEY UPDATE value=VALUES(value)', [ id, value ]);
}

async function del(id) {
    await database.query('DELETE FROM blobs WHERE id=?', [ id ]);
}

async function clear() {
    await database.query('DELETE FROM blobs');
}

async function generateSecrets() {
    debug('generateSecrets: generating dhparams.pem');
    // https://security.stackexchange.com/questions/95178/diffie-hellman-parameters-still-calculating-after-24-hours
    const dhparams = safe.child_process.execSync('openssl dhparam -dsaparam 2048');
    if (!dhparams) throw new BoxError(BoxError.OPENSSL_ERROR, safe.error);
    if (!safe.fs.writeFileSync(paths.DHPARAMS_FILE, dhparams)) throw new BoxError(BoxError.FS_ERROR, `Could not save dhparams.pem: ${safe.error.message}`);
    await set(exports.DHPARAMS, dhparams);
}

async function restoreSecrets() {
    const dhparams = await get(exports.DHPARAMS);
    if (!dhparams) throw new BoxError(BoxError.NOT_FOUND, 'dhparams not found');
    if (!safe.fs.writeFileSync(paths.DHPARAMS_FILE, dhparams)) throw new BoxError(BoxError.FS_ERROR, `Could not save dhparams.pem: ${safe.error.message}`);
}