keyserver/src/route/hkp.js

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/**
* Mailvelope - secure email with OpenPGP encryption for Webmail
* Copyright (C) 2016 Mailvelope GmbH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
'use strict';
const parse = require('co-body');
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const util = require('../service/util');
/**
* An implementation of the OpenPGP HTTP Keyserver Protocol (HKP)
* See https://tools.ietf.org/html/draft-shaw-openpgp-hkp-00
*/
class HKP {
/**
* Create an instance of the HKP server
* @param {Object} publicKey An instance of the public key controller
*/
constructor(publicKey) {
this._publicKey = publicKey;
}
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/**
* Public key upload via http POST
* @param {Object} ctx The koa request/response context
*/
*add(ctx) {
let body = yield parse.form(ctx, { limit: '1mb' });
if (!util.validatePublicKey(body.keytext)) {
ctx.throw(400, 'Invalid request!');
}
yield this._publicKey.put({ publicKeyArmored:body.keytext });
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}
/**
* Public key lookup via http GET
* @param {Object} ctx The koa request/response context
*/
*lookup(ctx) {
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let params = this.parseQueryString(ctx);
let key = yield this._publicKey.get(params);
this.setGetHeaders(ctx, params);
ctx.body = key.publicKeyArmored;
}
/**
* Parse the query string for a lookup request and set a corresponding
* error code if the requests is not supported or invalid.
* @param {Object} ctx The koa request/response context
* @return {Object} The query parameters or undefined for an invalid request
*/
parseQueryString(ctx) {
let params = {
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op: ctx.query.op, // operation ... only 'get' is supported
mr: ctx.query.options === 'mr' // machine readable
};
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if (this.checkId(ctx.query.search)) {
params.keyid = ctx.query.search.replace(/^0x/, '');
} else if(util.validateAddress(ctx.query.search)) {
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params.email = ctx.query.search;
}
if (params.op !== 'get') {
ctx.throw(501, 'Not implemented!');
} else if (!params.keyid && !params.email) {
ctx.throw(400, 'Invalid request!');
}
return params;
}
/**
* Checks for a valid key id in the query string. A key must be prepended
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* with '0x' and can be between 8 and 40 hex characters long.
* @param {String} keyid The key id
* @return {Boolean} If the key id is valid
*/
checkId(keyid) {
if (!util.isString(keyid)) {
return false;
}
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return /^0x[a-fA-F0-9]{8,40}$/.test(keyid);
}
/**
* Set HTTP headers for a GET requests with 'mr' (machine readable) options.
* @param {Object} ctx The koa request/response context
* @param {Object} params The parsed query string parameters
*/
setGetHeaders(ctx, params) {
if (params.mr) {
ctx.set('Content-Type', 'application/pgp-keys; charset=UTF-8');
ctx.set('Content-Disposition', 'attachment; filename=openpgpkey.asc');
}
}
}
module.exports = HKP;