85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
// OpenPGP.js - An OpenPGP implementation in javascript
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// Copyright (C) 2018 Wiktor Kwapisiewicz
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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 This class implements a client for the Web Key Directory (wkd) protocol
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* in order to lookup keys on designated servers.
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* See: https://datatracker.ietf.org/doc/draft-koch-openpgp-webkey-service/
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* @module wkd
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*/
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import util from './util';
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import crypto from './crypto';
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import * as keyMod from './key';
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/**
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* Initialize the WKD client
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* @constructor
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*/
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function WKD() {
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this._fetch = typeof globalThis.fetch === 'function' ? globalThis.fetch : require('node-fetch');
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}
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/**
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* Search for a public key using Web Key Directory protocol.
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* @param {String} options.email User's email.
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* @param {Boolean} options.rawBytes Returns Uint8Array instead of parsed key.
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* @returns {Promise<Uint8Array|
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* {keys: Array<module:key.Key>,
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* err: (Array<Error>|null)}>} The public key.
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* @async
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*/
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WKD.prototype.lookup = async function(options) {
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const fetch = this._fetch;
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if (!options.email) {
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throw new Error('You must provide an email parameter!');
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}
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if (!util.isEmailAddress(options.email)) {
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throw new Error('Invalid e-mail address.');
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}
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const [, localPart, domain] = /(.*)@(.*)/.exec(options.email);
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const localEncoded = util.encodeZBase32(await crypto.hash.sha1(util.strToUint8Array(localPart.toLowerCase())));
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const urlAdvanced = `https://openpgpkey.${domain}/.well-known/openpgpkey/${domain}/hu/${localEncoded}`;
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const urlDirect = `https://${domain}/.well-known/openpgpkey/hu/${localEncoded}`;
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let response;
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try {
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response = await fetch(urlAdvanced);
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if (response.status !== 200) {
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throw new Error('Advanced WKD lookup failed: ' + response.statusText);
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}
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} catch (err) {
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util.print_debug_error(err);
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response = await fetch(urlDirect);
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if (response.status !== 200) {
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throw new Error('Direct WKD lookup failed: ' + response.statusText);
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}
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}
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const rawBytes = new Uint8Array(await response.arrayBuffer());
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if (options.rawBytes) {
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return rawBytes;
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}
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return keyMod.readAll(rawBytes);
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};
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export default WKD;
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