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114 lines
3.6 KiB
JavaScript
114 lines
3.6 KiB
JavaScript
// GPG4Browsers - An OpenPGP implementation in javascript
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// Copyright (C) 2011 Recurity Labs GmbH
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3.0 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/**
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* @fileoverview Provides the LocalStore class
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* @requires web-stream-tools
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* @requires config
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* @requires key
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* @module keyring/localstore
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*/
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import stream from 'web-stream-tools';
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import config from '../config';
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import { readArmored } from '../key';
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/**
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* The class that deals with storage of the keyring.
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* Currently the only option is to use HTML5 local storage.
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* @constructor
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* @param {String} prefix prefix for itemnames in localstore
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*/
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function LocalStore(prefix) {
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prefix = prefix || 'openpgp-';
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this.publicKeysItem = prefix + this.publicKeysItem;
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this.privateKeysItem = prefix + this.privateKeysItem;
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if (typeof global !== 'undefined' && global.localStorage) {
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this.storage = global.localStorage;
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} else {
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this.storage = new (require('node-localstorage').LocalStorage)(config.node_store);
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}
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}
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/*
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* Declare the localstore itemnames
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*/
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LocalStore.prototype.publicKeysItem = 'public-keys';
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LocalStore.prototype.privateKeysItem = 'private-keys';
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/**
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* Load the public keys from HTML5 local storage.
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* @returns {Array<module:key.Key>} array of keys retrieved from localstore
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* @async
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*/
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LocalStore.prototype.loadPublic = async function () {
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return loadKeys(this.storage, this.publicKeysItem);
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};
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/**
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* Load the private keys from HTML5 local storage.
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* @returns {Array<module:key.Key>} array of keys retrieved from localstore
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* @async
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*/
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LocalStore.prototype.loadPrivate = async function () {
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return loadKeys(this.storage, this.privateKeysItem);
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};
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async function loadKeys(storage, itemname) {
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const armoredKeys = JSON.parse(storage.getItem(itemname));
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const keys = [];
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if (armoredKeys !== null && armoredKeys.length !== 0) {
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let key;
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for (let i = 0; i < armoredKeys.length; i++) {
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key = await readArmored(armoredKeys[i]);
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keys.push(key);
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}
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}
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return keys;
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}
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/**
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* Saves the current state of the public keys to HTML5 local storage.
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* The key array gets stringified using JSON
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* @param {Array<module:key.Key>} keys array of keys to save in localstore
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* @async
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*/
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LocalStore.prototype.storePublic = async function (keys) {
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await storeKeys(this.storage, this.publicKeysItem, keys);
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};
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/**
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* Saves the current state of the private keys to HTML5 local storage.
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* The key array gets stringified using JSON
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* @param {Array<module:key.Key>} keys array of keys to save in localstore
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* @async
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*/
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LocalStore.prototype.storePrivate = async function (keys) {
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await storeKeys(this.storage, this.privateKeysItem, keys);
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};
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async function storeKeys(storage, itemname, keys) {
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if (keys.length) {
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const armoredKeys = await Promise.all(keys.map(key => stream.readToEnd(key.armor())));
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storage.setItem(itemname, JSON.stringify(armoredKeys));
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} else {
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storage.removeItem(itemname);
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}
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}
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export default LocalStore;
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