1133 lines
39 KiB
JavaScript
1133 lines
39 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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* @requires config
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* @requires encoding/armor
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* @requires enums
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* @requires packet
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* @module key
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*/
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'use strict';
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import packet from './packet';
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import enums from './enums.js';
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import armor from './encoding/armor.js';
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import config from './config';
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import util from './util';
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/**
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* @class
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* @classdesc Class that represents an OpenPGP key. Must contain a primary key.
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* Can contain additional subkeys, signatures, user ids, user attributes.
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* @param {module:packet/packetlist} packetlist The packets that form this key
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*/
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export function Key(packetlist) {
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if (!(this instanceof Key)) {
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return new Key(packetlist);
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}
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// same data as in packetlist but in structured form
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this.primaryKey = null;
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this.revocationSignature = null;
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this.directSignatures = null;
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this.users = null;
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this.subKeys = null;
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this.packetlist2structure(packetlist);
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if (!this.primaryKey || !this.users) {
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throw new Error('Invalid key: need at least key and user ID packet');
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}
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}
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/**
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* Transforms packetlist to structured key data
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* @param {module:packet/packetlist} packetlist The packets that form a key
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*/
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Key.prototype.packetlist2structure = function(packetlist) {
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var user, primaryKeyId, subKey;
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for (var i = 0; i < packetlist.length; i++) {
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switch (packetlist[i].tag) {
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case enums.packet.publicKey:
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case enums.packet.secretKey:
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this.primaryKey = packetlist[i];
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primaryKeyId = this.primaryKey.getKeyId();
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break;
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case enums.packet.userid:
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case enums.packet.userAttribute:
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user = new User(packetlist[i]);
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if (!this.users) {
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this.users = [];
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}
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this.users.push(user);
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break;
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case enums.packet.publicSubkey:
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case enums.packet.secretSubkey:
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user = null;
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if (!this.subKeys) {
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this.subKeys = [];
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}
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subKey = new SubKey(packetlist[i]);
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this.subKeys.push(subKey);
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break;
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case enums.packet.signature:
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switch (packetlist[i].signatureType) {
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case enums.signature.cert_generic:
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case enums.signature.cert_persona:
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case enums.signature.cert_casual:
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case enums.signature.cert_positive:
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if (!user) {
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util.print_debug('Dropping certification signatures without preceding user packet');
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continue;
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}
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if (packetlist[i].issuerKeyId.equals(primaryKeyId)) {
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if (!user.selfCertifications) {
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user.selfCertifications = [];
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}
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user.selfCertifications.push(packetlist[i]);
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} else {
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if (!user.otherCertifications) {
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user.otherCertifications = [];
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}
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user.otherCertifications.push(packetlist[i]);
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}
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break;
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case enums.signature.cert_revocation:
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if (user) {
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if (!user.revocationCertifications) {
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user.revocationCertifications = [];
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}
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user.revocationCertifications.push(packetlist[i]);
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} else {
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if (!this.directSignatures) {
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this.directSignatures = [];
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}
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this.directSignatures.push(packetlist[i]);
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}
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break;
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case enums.signature.key:
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if (!this.directSignatures) {
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this.directSignatures = [];
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}
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this.directSignatures.push(packetlist[i]);
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break;
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case enums.signature.subkey_binding:
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if (!subKey) {
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util.print_debug('Dropping subkey binding signature without preceding subkey packet');
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continue;
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}
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subKey.bindingSignature = packetlist[i];
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break;
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case enums.signature.key_revocation:
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this.revocationSignature = packetlist[i];
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break;
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case enums.signature.subkey_revocation:
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if (!subKey) {
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util.print_debug('Dropping subkey revocation signature without preceding subkey packet');
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continue;
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}
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subKey.revocationSignature = packetlist[i];
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break;
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}
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break;
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}
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}
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};
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/**
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* Transforms structured key data to packetlist
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* @return {module:packet/packetlist} The packets that form a key
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*/
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Key.prototype.toPacketlist = function() {
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var packetlist = new packet.List();
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packetlist.push(this.primaryKey);
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packetlist.push(this.revocationSignature);
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packetlist.concat(this.directSignatures);
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var i;
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for (i = 0; i < this.users.length; i++) {
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packetlist.concat(this.users[i].toPacketlist());
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}
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if (this.subKeys) {
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for (i = 0; i < this.subKeys.length; i++) {
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packetlist.concat(this.subKeys[i].toPacketlist());
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}
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}
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return packetlist;
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};
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/**
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* Returns all the private and public subkey packets
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* @returns {Array<(module:packet/public_subkey|module:packet/secret_subkey)>}
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*/
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Key.prototype.getSubkeyPackets = function() {
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var subKeys = [];
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if (this.subKeys) {
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for (var i = 0; i < this.subKeys.length; i++) {
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subKeys.push(this.subKeys[i].subKey);
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}
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}
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return subKeys;
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};
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/**
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* Returns all the private and public key and subkey packets
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* @returns {Array<(module:packet/public_subkey|module:packet/secret_subkey|module:packet/secret_key|module:packet/public_key)>}
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*/
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Key.prototype.getAllKeyPackets = function() {
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return [this.primaryKey].concat(this.getSubkeyPackets());
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};
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/**
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* Returns key IDs of all key packets
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* @returns {Array<module:type/keyid>}
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*/
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Key.prototype.getKeyIds = function() {
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var keyIds = [];
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var keys = this.getAllKeyPackets();
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for (var i = 0; i < keys.length; i++) {
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keyIds.push(keys[i].getKeyId());
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}
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return keyIds;
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};
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/**
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* Returns first key packet for given array of key IDs
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* @param {Array<module:type/keyid>} keyIds
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* @return {(module:packet/public_subkey|module:packet/public_key|
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* module:packet/secret_subkey|module:packet/secret_key|null)}
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*/
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Key.prototype.getKeyPacket = function(keyIds) {
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var keys = this.getAllKeyPackets();
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for (var i = 0; i < keys.length; i++) {
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var keyId = keys[i].getKeyId();
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for (var j = 0; j < keyIds.length; j++) {
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if (keyId.equals(keyIds[j])) {
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return keys[i];
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}
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}
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}
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return null;
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};
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/**
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* Returns userids
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* @return {Array<string>} array of userids
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*/
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Key.prototype.getUserIds = function() {
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var userids = [];
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for (var i = 0; i < this.users.length; i++) {
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if (this.users[i].userId) {
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userids.push(util.Uint8Array2str(this.users[i].userId.write()));
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}
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}
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return userids;
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};
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/**
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* Returns true if this is a public key
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* @return {Boolean}
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*/
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Key.prototype.isPublic = function() {
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return this.primaryKey.tag === enums.packet.publicKey;
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};
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/**
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* Returns true if this is a private key
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* @return {Boolean}
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*/
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Key.prototype.isPrivate = function() {
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return this.primaryKey.tag === enums.packet.secretKey;
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};
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/**
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* Returns key as public key (shallow copy)
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* @return {module:key~Key} new public Key
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*/
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Key.prototype.toPublic = function() {
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var packetlist = new packet.List();
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var keyPackets = this.toPacketlist();
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var bytes;
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for (var i = 0; i < keyPackets.length; i++) {
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switch (keyPackets[i].tag) {
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case enums.packet.secretKey:
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bytes = keyPackets[i].writePublicKey();
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var pubKeyPacket = new packet.PublicKey();
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pubKeyPacket.read(bytes);
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packetlist.push(pubKeyPacket);
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break;
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case enums.packet.secretSubkey:
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bytes = keyPackets[i].writePublicKey();
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var pubSubkeyPacket = new packet.PublicSubkey();
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pubSubkeyPacket.read(bytes);
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packetlist.push(pubSubkeyPacket);
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break;
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default:
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packetlist.push(keyPackets[i]);
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}
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}
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return new Key(packetlist);
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};
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/**
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* Returns ASCII armored text of key
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* @return {String} ASCII armor
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*/
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Key.prototype.armor = function() {
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var type = this.isPublic() ? enums.armor.public_key : enums.armor.private_key;
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return armor.encode(type, this.toPacketlist().write());
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};
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/**
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* Returns first key packet or key packet by given keyId that is available for signing or signature verification
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* @param {module:type/keyid} keyId, optional
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* @return {(module:packet/secret_subkey|module:packet/secret_key|null)} key packet or null if no signing key has been found
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*/
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Key.prototype.getSigningKeyPacket = function(keyId) {
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var primaryUser = this.getPrimaryUser();
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if (primaryUser &&
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isValidSigningKeyPacket(this.primaryKey, primaryUser.selfCertificate) &&
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(!keyId || this.primaryKey.getKeyId().equals(keyId))) {
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return this.primaryKey;
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}
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if (this.subKeys) {
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for (var i = 0; i < this.subKeys.length; i++) {
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if (this.subKeys[i].isValidSigningKey(this.primaryKey) &&
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(!keyId || this.subKeys[i].subKey.getKeyId().equals(keyId))) {
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return this.subKeys[i].subKey;
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}
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}
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}
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return null;
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};
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/**
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* Returns preferred signature hash algorithm of this key
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* @return {String}
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*/
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Key.prototype.getPreferredHashAlgorithm = function() {
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var primaryUser = this.getPrimaryUser();
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if (primaryUser && primaryUser.selfCertificate.preferredHashAlgorithms) {
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return primaryUser.selfCertificate.preferredHashAlgorithms[0];
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}
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return config.prefer_hash_algorithm;
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};
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function isValidEncryptionKeyPacket(keyPacket, signature) {
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return keyPacket.algorithm !== enums.read(enums.publicKey, enums.publicKey.dsa) &&
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keyPacket.algorithm !== enums.read(enums.publicKey, enums.publicKey.rsa_sign) &&
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(!signature.keyFlags ||
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(signature.keyFlags[0] & enums.keyFlags.encrypt_communication) !== 0 ||
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(signature.keyFlags[0] & enums.keyFlags.encrypt_storage) !== 0);
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}
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function isValidSigningKeyPacket(keyPacket, signature) {
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return (keyPacket.algorithm === enums.read(enums.publicKey, enums.publicKey.dsa) ||
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keyPacket.algorithm === enums.read(enums.publicKey, enums.publicKey.rsa_sign) ||
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keyPacket.algorithm === enums.read(enums.publicKey, enums.publicKey.rsa_encrypt_sign)) &&
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(!signature.keyFlags ||
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(signature.keyFlags[0] & enums.keyFlags.sign_data) !== 0);
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}
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/**
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* Returns the first valid encryption key packet for this key
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* @returns {(module:packet/public_subkey|module:packet/secret_subkey|module:packet/secret_key|module:packet/public_key|null)} key packet or null if no encryption key has been found
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*/
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Key.prototype.getEncryptionKeyPacket = function() {
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// V4: by convention subkeys are prefered for encryption service
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// V3: keys MUST NOT have subkeys
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if (this.subKeys) {
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for (var i = 0; i < this.subKeys.length; i++) {
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if (this.subKeys[i].isValidEncryptionKey(this.primaryKey)) {
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return this.subKeys[i].subKey;
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}
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}
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}
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// if no valid subkey for encryption, evaluate primary key
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var primaryUser = this.getPrimaryUser();
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if (primaryUser && primaryUser.selfCertificate && !primaryUser.selfCertificate.isExpired &&
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isValidEncryptionKeyPacket(this.primaryKey, primaryUser.selfCertificate)) {
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return this.primaryKey;
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}
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return null;
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};
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/**
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* Encrypts all secret key and subkey packets
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* @param {String} passphrase
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*/
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Key.prototype.encrypt = function(passphrase) {
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if (!this.isPrivate()) {
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throw new Error("Nothing to encrypt in a public key");
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}
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var keys = this.getAllKeyPackets();
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for (var i = 0; i < keys.length; i++) {
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keys[i].encrypt(passphrase);
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keys[i].clearPrivateMPIs();
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}
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};
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/**
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* Decrypts all secret key and subkey packets
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* @param {String} passphrase
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* @return {Boolean} true if all key and subkey packets decrypted successfully
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*/
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Key.prototype.decrypt = function(passphrase) {
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if (this.isPrivate()) {
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var keys = this.getAllKeyPackets();
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for (var i = 0; i < keys.length; i++) {
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var success = keys[i].decrypt(passphrase);
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if (!success) {
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return false;
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}
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}
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} else {
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throw new Error("Nothing to decrypt in a public key");
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}
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return true;
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};
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/**
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* Decrypts specific key packets by key ID
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* @param {Array<module:type/keyid>} keyIds
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* @param {String} passphrase
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* @return {Boolean} true if all key packets decrypted successfully
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*/
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Key.prototype.decryptKeyPacket = function(keyIds, passphrase) {
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if (this.isPrivate()) {
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var keys = this.getAllKeyPackets();
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for (var i = 0; i < keys.length; i++) {
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var keyId = keys[i].getKeyId();
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for (var j = 0; j < keyIds.length; j++) {
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if (keyId.equals(keyIds[j])) {
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var success = keys[i].decrypt(passphrase);
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if (!success) {
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return false;
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}
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}
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}
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}
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} else {
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throw new Error("Nothing to decrypt in a public key");
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}
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return true;
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};
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/**
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* Verify primary key. Checks for revocation signatures, expiration time
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* and valid self signature
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* @return {module:enums.keyStatus} The status of the primary key
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*/
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Key.prototype.verifyPrimaryKey = function() {
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// check revocation signature
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if (this.revocationSignature && !this.revocationSignature.isExpired() &&
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(this.revocationSignature.verified ||
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this.revocationSignature.verify(this.primaryKey, {key: this.primaryKey}))) {
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return enums.keyStatus.revoked;
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}
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// check V3 expiration time
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if (this.primaryKey.version === 3 && this.primaryKey.expirationTimeV3 !== 0 &&
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Date.now() > (this.primaryKey.created.getTime() + this.primaryKey.expirationTimeV3*24*3600*1000)) {
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return enums.keyStatus.expired;
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}
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// check for at least one self signature. Self signature of user ID not mandatory
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// See {@link http://tools.ietf.org/html/rfc4880#section-11.1}
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var selfSigned = false;
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for (var i = 0; i < this.users.length; i++) {
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if (this.users[i].userId && this.users[i].selfCertifications) {
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selfSigned = true;
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}
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}
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if (!selfSigned) {
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return enums.keyStatus.no_self_cert;
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}
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// check for valid self signature
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var primaryUser = this.getPrimaryUser();
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if (!primaryUser) {
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return enums.keyStatus.invalid;
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}
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// check V4 expiration time
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if (this.primaryKey.version === 4 && primaryUser.selfCertificate.keyNeverExpires === false &&
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Date.now() > (this.primaryKey.created.getTime() + primaryUser.selfCertificate.keyExpirationTime*1000)) {
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return enums.keyStatus.expired;
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}
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return enums.keyStatus.valid;
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};
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/**
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* Returns the expiration time of the primary key or null if key does not expire
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* @return {Date|null}
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*/
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Key.prototype.getExpirationTime = function() {
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if (this.primaryKey.version === 3) {
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return getExpirationTime(this.primaryKey);
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}
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if (this.primaryKey.version === 4) {
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var primaryUser = this.getPrimaryUser();
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if (!primaryUser) {
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return null;
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}
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return getExpirationTime(this.primaryKey, primaryUser.selfCertificate);
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}
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};
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function getExpirationTime(keyPacket, selfCertificate) {
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// check V3 expiration time
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if (keyPacket.version === 3 && keyPacket.expirationTimeV3 !== 0) {
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return new Date(keyPacket.created.getTime() + keyPacket.expirationTimeV3*24*3600*1000);
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}
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// check V4 expiration time
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if (keyPacket.version === 4 && selfCertificate.keyNeverExpires === false) {
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return new Date(keyPacket.created.getTime() + selfCertificate.keyExpirationTime*1000);
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}
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return null;
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}
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/**
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* Returns primary user and most significant (latest valid) self signature
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* - if multiple users are marked as primary users returns the one with the latest self signature
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* - if no primary user is found returns the user with the latest self signature
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* @return {{user: Array<module:packet/User>, selfCertificate: Array<module:packet/signature>}|null} The primary user and the self signature
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*/
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Key.prototype.getPrimaryUser = function() {
|
|
var primUser = [];
|
|
for (var i = 0; i < this.users.length; i++) {
|
|
if (!this.users[i].userId || !this.users[i].selfCertifications) {
|
|
continue;
|
|
}
|
|
for (var j = 0; j < this.users[i].selfCertifications.length; j++) {
|
|
primUser.push({user: this.users[i], selfCertificate: this.users[i].selfCertifications[j]});
|
|
}
|
|
}
|
|
// sort by primary user flag and signature creation time
|
|
primUser = primUser.sort(function(a, b) {
|
|
if (a.selfCertificate.isPrimaryUserID > b.selfCertificate.isPrimaryUserID) {
|
|
return -1;
|
|
} else if (a.selfCertificate.isPrimaryUserID < b.selfCertificate.isPrimaryUserID) {
|
|
return 1;
|
|
} else if (a.selfCertificate.created > b.selfCertificate.created) {
|
|
return -1;
|
|
} else if (a.selfCertificate.created < b.selfCertificate.created) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
});
|
|
// return first valid
|
|
for (var k = 0; k < primUser.length; k++) {
|
|
if (primUser[k].user.isValidSelfCertificate(this.primaryKey, primUser[k].selfCertificate)) {
|
|
return primUser[k];
|
|
}
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Update key with new components from specified key with same key ID:
|
|
* users, subkeys, certificates are merged into the destination key,
|
|
* duplicates are ignored.
|
|
* If the specified key is a private key and the destination key is public,
|
|
* the destination key is tranformed to a private key.
|
|
* @param {module:key~Key} key source key to merge
|
|
*/
|
|
Key.prototype.update = function(key) {
|
|
var that = this;
|
|
if (key.verifyPrimaryKey() === enums.keyStatus.invalid) {
|
|
return;
|
|
}
|
|
if (this.primaryKey.getFingerprint() !== key.primaryKey.getFingerprint()) {
|
|
throw new Error('Key update method: fingerprints of keys not equal');
|
|
}
|
|
if (this.isPublic() && key.isPrivate()) {
|
|
// check for equal subkey packets
|
|
var equal = ((this.subKeys && this.subKeys.length) === (key.subKeys && key.subKeys.length)) &&
|
|
(!this.subKeys || this.subKeys.every(function(destSubKey) {
|
|
return key.subKeys.some(function(srcSubKey) {
|
|
return destSubKey.subKey.getFingerprint() === srcSubKey.subKey.getFingerprint();
|
|
});
|
|
}));
|
|
if (!equal) {
|
|
throw new Error('Cannot update public key with private key if subkey mismatch');
|
|
}
|
|
this.primaryKey = key.primaryKey;
|
|
}
|
|
// revocation signature
|
|
if (!this.revocationSignature && key.revocationSignature && !key.revocationSignature.isExpired() &&
|
|
(key.revocationSignature.verified ||
|
|
key.revocationSignature.verify(key.primaryKey, {key: key.primaryKey}))) {
|
|
this.revocationSignature = key.revocationSignature;
|
|
}
|
|
// direct signatures
|
|
mergeSignatures(key, this, 'directSignatures');
|
|
// users
|
|
key.users.forEach(function(srcUser) {
|
|
var found = false;
|
|
for (var i = 0; i < that.users.length; i++) {
|
|
if (srcUser.userId && (srcUser.userId.userid === that.users[i].userId.userid) ||
|
|
srcUser.userAttribute && (srcUser.userAttribute.equals(that.users[i].userAttribute))) {
|
|
that.users[i].update(srcUser, that.primaryKey);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
that.users.push(srcUser);
|
|
}
|
|
});
|
|
// subkeys
|
|
if (key.subKeys) {
|
|
key.subKeys.forEach(function(srcSubKey) {
|
|
var found = false;
|
|
for (var i = 0; i < that.subKeys.length; i++) {
|
|
if (srcSubKey.subKey.getFingerprint() === that.subKeys[i].subKey.getFingerprint()) {
|
|
that.subKeys[i].update(srcSubKey, that.primaryKey);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
that.subKeys.push(srcSubKey);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Merges signatures from source[attr] to dest[attr]
|
|
* @private
|
|
* @param {Object} source
|
|
* @param {Object} dest
|
|
* @param {String} attr
|
|
* @param {Function} checkFn optional, signature only merged if true
|
|
*/
|
|
function mergeSignatures(source, dest, attr, checkFn) {
|
|
source = source[attr];
|
|
if (source) {
|
|
if (!dest[attr]) {
|
|
dest[attr] = source;
|
|
} else {
|
|
source.forEach(function(sourceSig) {
|
|
if (!sourceSig.isExpired() && (!checkFn || checkFn(sourceSig)) &&
|
|
!dest[attr].some(function(destSig) {
|
|
return util.equalsUint8Array(destSig.signature,sourceSig.signature);
|
|
})) {
|
|
dest[attr].push(sourceSig);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
// TODO
|
|
Key.prototype.revoke = function() {
|
|
|
|
};
|
|
|
|
/**
|
|
* @class
|
|
* @classdesc Class that represents an user ID or attribute packet and the relevant signatures.
|
|
*/
|
|
function User(userPacket) {
|
|
if (!(this instanceof User)) {
|
|
return new User(userPacket);
|
|
}
|
|
this.userId = userPacket.tag === enums.packet.userid ? userPacket : null;
|
|
this.userAttribute = userPacket.tag === enums.packet.userAttribute ? userPacket : null;
|
|
this.selfCertifications = null;
|
|
this.otherCertifications = null;
|
|
this.revocationCertifications = null;
|
|
}
|
|
|
|
/**
|
|
* Transforms structured user data to packetlist
|
|
* @return {module:packet/packetlist}
|
|
*/
|
|
User.prototype.toPacketlist = function() {
|
|
var packetlist = new packet.List();
|
|
packetlist.push(this.userId || this.userAttribute);
|
|
packetlist.concat(this.revocationCertifications);
|
|
packetlist.concat(this.selfCertifications);
|
|
packetlist.concat(this.otherCertifications);
|
|
return packetlist;
|
|
};
|
|
|
|
/**
|
|
* Checks if a self signature of the user is revoked
|
|
* @param {module:packet/signature} certificate
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @return {Boolean} True if the certificate is revoked
|
|
*/
|
|
User.prototype.isRevoked = function(certificate, primaryKey) {
|
|
if (this.revocationCertifications) {
|
|
var that = this;
|
|
return this.revocationCertifications.some(function(revCert) {
|
|
return revCert.issuerKeyId.equals(certificate.issuerKeyId) &&
|
|
!revCert.isExpired() &&
|
|
(revCert.verified ||
|
|
revCert.verify(primaryKey, {userid: that.userId || that.userAttribute, key: primaryKey}));
|
|
});
|
|
} else {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Returns the most significant (latest valid) self signature of the user
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @return {module:packet/signature} The self signature
|
|
*/
|
|
User.prototype.getValidSelfCertificate = function(primaryKey) {
|
|
if (!this.selfCertifications) {
|
|
return null;
|
|
}
|
|
// most recent first
|
|
var validCert = this.selfCertifications.sort(function(a, b) {
|
|
a = a.created;
|
|
b = b.created;
|
|
return a>b ? -1 : a<b ? 1 : 0;
|
|
});
|
|
for (var i = 0; i < validCert.length; i++) {
|
|
if (this.isValidSelfCertificate(primaryKey, validCert[i])) {
|
|
return validCert[i];
|
|
}
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Returns true if the self certificate is valid
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @param {module:packet/signature} selfCertificate A self certificate of this user
|
|
* @return {Boolean}
|
|
*/
|
|
User.prototype.isValidSelfCertificate = function(primaryKey, selfCertificate) {
|
|
if (this.isRevoked(selfCertificate, primaryKey)) {
|
|
return false;
|
|
}
|
|
if (!selfCertificate.isExpired() &&
|
|
(selfCertificate.verified ||
|
|
selfCertificate.verify(primaryKey, {userid: this.userId || this.userAttribute, key: primaryKey}))) {
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* Verify User. Checks for existence of self signatures, revocation signatures
|
|
* and validity of self signature
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @return {module:enums.keyStatus} status of user
|
|
*/
|
|
User.prototype.verify = function(primaryKey) {
|
|
if (!this.selfCertifications) {
|
|
return enums.keyStatus.no_self_cert;
|
|
}
|
|
var status;
|
|
for (var i = 0; i < this.selfCertifications.length; i++) {
|
|
if (this.isRevoked(this.selfCertifications[i], primaryKey)) {
|
|
status = enums.keyStatus.revoked;
|
|
continue;
|
|
}
|
|
if (!(this.selfCertifications[i].verified ||
|
|
this.selfCertifications[i].verify(primaryKey, {userid: this.userId || this.userAttribute, key: primaryKey}))) {
|
|
status = enums.keyStatus.invalid;
|
|
continue;
|
|
}
|
|
if (this.selfCertifications[i].isExpired()) {
|
|
status = enums.keyStatus.expired;
|
|
continue;
|
|
}
|
|
status = enums.keyStatus.valid;
|
|
break;
|
|
}
|
|
return status;
|
|
};
|
|
|
|
/**
|
|
* Update user with new components from specified user
|
|
* @param {module:key~User} user source user to merge
|
|
* @param {module:packet/signature} primaryKey primary key used for validation
|
|
*/
|
|
User.prototype.update = function(user, primaryKey) {
|
|
var that = this;
|
|
// self signatures
|
|
mergeSignatures(user, this, 'selfCertifications', function(srcSelfSig) {
|
|
return srcSelfSig.verified ||
|
|
srcSelfSig.verify(primaryKey, {userid: that.userId || that.userAttribute, key: primaryKey});
|
|
});
|
|
// other signatures
|
|
mergeSignatures(user, this, 'otherCertifications');
|
|
// revocation signatures
|
|
mergeSignatures(user, this, 'revocationCertifications');
|
|
};
|
|
|
|
/**
|
|
* @class
|
|
* @classdesc Class that represents a subkey packet and the relevant signatures.
|
|
*/
|
|
function SubKey(subKeyPacket) {
|
|
if (!(this instanceof SubKey)) {
|
|
return new SubKey(subKeyPacket);
|
|
}
|
|
this.subKey = subKeyPacket;
|
|
this.bindingSignature = null;
|
|
this.revocationSignature = null;
|
|
}
|
|
|
|
/**
|
|
* Transforms structured subkey data to packetlist
|
|
* @return {module:packet/packetlist}
|
|
*/
|
|
SubKey.prototype.toPacketlist = function() {
|
|
var packetlist = new packet.List();
|
|
packetlist.push(this.subKey);
|
|
packetlist.push(this.revocationSignature);
|
|
packetlist.push(this.bindingSignature);
|
|
return packetlist;
|
|
};
|
|
|
|
/**
|
|
* Returns true if the subkey can be used for encryption
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @return {Boolean}
|
|
*/
|
|
SubKey.prototype.isValidEncryptionKey = function(primaryKey) {
|
|
return this.verify(primaryKey) === enums.keyStatus.valid &&
|
|
isValidEncryptionKeyPacket(this.subKey, this.bindingSignature);
|
|
};
|
|
|
|
/**
|
|
* Returns true if the subkey can be used for signing of data
|
|
* @param {module:packet/secret_key|module:packet/public_key} primaryKey The primary key packet
|
|
* @return {Boolean}
|
|
*/
|
|
SubKey.prototype.isValidSigningKey = function(primaryKey) {
|
|
return this.verify(primaryKey) === enums.keyStatus.valid &&
|
|
isValidSigningKeyPacket(this.subKey, this.bindingSignature);
|
|
};
|
|
|
|
/**
|
|
* Verify subkey. Checks for revocation signatures, expiration time
|
|
* and valid binding signature
|
|
* @return {module:enums.keyStatus} The status of the subkey
|
|
*/
|
|
SubKey.prototype.verify = function(primaryKey) {
|
|
// check subkey revocation signature
|
|
if (this.revocationSignature && !this.revocationSignature.isExpired() &&
|
|
(this.revocationSignature.verified ||
|
|
this.revocationSignature.verify(primaryKey, {key:primaryKey, bind: this.subKey}))) {
|
|
return enums.keyStatus.revoked;
|
|
}
|
|
// check V3 expiration time
|
|
if (this.subKey.version === 3 && this.subKey.expirationTimeV3 !== 0 &&
|
|
Date.now() > (this.subKey.created.getTime() + this.subKey.expirationTimeV3*24*3600*1000)) {
|
|
return enums.keyStatus.expired;
|
|
}
|
|
// check subkey binding signature
|
|
if (!this.bindingSignature) {
|
|
return enums.keyStatus.invalid;
|
|
}
|
|
if (this.bindingSignature.isExpired()) {
|
|
return enums.keyStatus.expired;
|
|
}
|
|
if (!(this.bindingSignature.verified ||
|
|
this.bindingSignature.verify(primaryKey, {key: primaryKey, bind: this.subKey}))) {
|
|
return enums.keyStatus.invalid;
|
|
}
|
|
// check V4 expiration time
|
|
if (this.subKey.version === 4 &&
|
|
this.bindingSignature.keyNeverExpires === false &&
|
|
Date.now() > (this.subKey.created.getTime() + this.bindingSignature.keyExpirationTime*1000)) {
|
|
return enums.keyStatus.expired;
|
|
}
|
|
return enums.keyStatus.valid;
|
|
};
|
|
|
|
/**
|
|
* Returns the expiration time of the subkey or null if key does not expire
|
|
* @return {Date|null}
|
|
*/
|
|
SubKey.prototype.getExpirationTime = function() {
|
|
return getExpirationTime(this.subKey, this.bindingSignature);
|
|
};
|
|
|
|
/**
|
|
* Update subkey with new components from specified subkey
|
|
* @param {module:key~SubKey} subKey source subkey to merge
|
|
* @param {module:packet/signature} primaryKey primary key used for validation
|
|
*/
|
|
SubKey.prototype.update = function(subKey, primaryKey) {
|
|
if (subKey.verify(primaryKey) === enums.keyStatus.invalid) {
|
|
return;
|
|
}
|
|
if (this.subKey.getFingerprint() !== subKey.subKey.getFingerprint()) {
|
|
throw new Error('SubKey update method: fingerprints of subkeys not equal');
|
|
}
|
|
// key packet
|
|
if (this.subKey.tag === enums.packet.publicSubkey &&
|
|
subKey.subKey.tag === enums.packet.secretSubkey) {
|
|
this.subKey = subKey.subKey;
|
|
}
|
|
// binding signature
|
|
if (!this.bindingSignature && subKey.bindingSignature &&
|
|
(subKey.bindingSignature.verified ||
|
|
subKey.bindingSignature.verify(primaryKey, {key: primaryKey, bind: this.subKey}))) {
|
|
this.bindingSignature = subKey.bindingSignature;
|
|
}
|
|
// revocation signature
|
|
if (!this.revocationSignature && subKey.revocationSignature && !subKey.revocationSignature.isExpired() &&
|
|
(subKey.revocationSignature.verified ||
|
|
subKey.revocationSignature.verify(primaryKey, {key: primaryKey, bind: this.subKey}))) {
|
|
this.revocationSignature = subKey.revocationSignature;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Reads an OpenPGP armored text and returns one or multiple key objects
|
|
* @param {String} armoredText text to be parsed
|
|
* @return {{keys: Array<module:key~Key>, err: (Array<Error>|null)}} result object with key and error arrays
|
|
* @static
|
|
*/
|
|
export function readArmored(armoredText) {
|
|
var result = {};
|
|
result.keys = [];
|
|
try {
|
|
var input = armor.decode(armoredText);
|
|
if (!(input.type === enums.armor.public_key || input.type === enums.armor.private_key)) {
|
|
throw new Error('Armored text not of type key');
|
|
}
|
|
var packetlist = new packet.List();
|
|
packetlist.read(input.data);
|
|
var keyIndex = packetlist.indexOfTag(enums.packet.publicKey, enums.packet.secretKey);
|
|
if (keyIndex.length === 0) {
|
|
throw new Error('No key packet found in armored text');
|
|
}
|
|
for (var i = 0; i < keyIndex.length; i++) {
|
|
var oneKeyList = packetlist.slice(keyIndex[i], keyIndex[i + 1]);
|
|
try {
|
|
var newKey = new Key(oneKeyList);
|
|
result.keys.push(newKey);
|
|
} catch (e) {
|
|
result.err = result.err || [];
|
|
result.err.push(e);
|
|
}
|
|
}
|
|
} catch (e) {
|
|
result.err = result.err || [];
|
|
result.err.push(e);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Generates a new OpenPGP key. Currently only supports RSA keys.
|
|
* Primary and subkey will be of same type.
|
|
* @param {module:enums.publicKey} [options.keyType=module:enums.publicKey.rsa_encrypt_sign] to indicate what type of key to make.
|
|
* RSA is 1. See {@link http://tools.ietf.org/html/rfc4880#section-9.1}
|
|
* @param {Integer} options.numBits number of bits for the key creation.
|
|
* @param {String|Array<String>} options.userIds assumes already in form of "User Name <username@email.com>"
|
|
If array is used, the first userId is set as primary user Id
|
|
* @param {String} options.passphrase The passphrase used to encrypt the resulting private key
|
|
* @param {Boolean} [options.unlocked=false] The secret part of the generated key is unlocked
|
|
* @param {Number} [options.keyExpirationTime=0] The number of seconds after the key creation time that the key expires
|
|
* @return {module:key~Key}
|
|
* @static
|
|
*/
|
|
export function generate(options) {
|
|
var secretKeyPacket, secretSubkeyPacket;
|
|
return Promise.resolve().then(() => {
|
|
options.keyType = options.keyType || enums.publicKey.rsa_encrypt_sign;
|
|
if (options.keyType !== enums.publicKey.rsa_encrypt_sign) { // RSA Encrypt-Only and RSA Sign-Only are deprecated and SHOULD NOT be generated
|
|
throw new Error('Only RSA Encrypt or Sign supported');
|
|
}
|
|
|
|
if (!options.passphrase) { // Key without passphrase is unlocked by definition
|
|
options.unlocked = true;
|
|
}
|
|
if (String.prototype.isPrototypeOf(options.userIds) || typeof options.userIds === 'string') {
|
|
options.userIds = [options.userIds];
|
|
}
|
|
|
|
return Promise.all([generateSecretKey(), generateSecretSubkey()]).then(() => {
|
|
return wrapKeyObject(secretKeyPacket, secretSubkeyPacket, options);
|
|
});
|
|
});
|
|
|
|
function generateSecretKey() {
|
|
secretKeyPacket = new packet.SecretKey();
|
|
secretKeyPacket.algorithm = enums.read(enums.publicKey, options.keyType);
|
|
return secretKeyPacket.generate(options.numBits);
|
|
}
|
|
|
|
function generateSecretSubkey() {
|
|
secretSubkeyPacket = new packet.SecretSubkey();
|
|
secretSubkeyPacket.algorithm = enums.read(enums.publicKey, options.keyType);
|
|
return secretSubkeyPacket.generate(options.numBits);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reformats and signs an OpenPGP with a given User ID. Currently only supports RSA keys.
|
|
* @param {module:key~Key} options.privateKey The private key to reformat
|
|
* @param {module:enums.publicKey} [options.keyType=module:enums.publicKey.rsa_encrypt_sign]
|
|
* @param {String|Array<String>} options.userIds assumes already in form of "User Name <username@email.com>"
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If array is used, the first userId is set as primary user Id
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* @param {String} options.passphrase The passphrase used to encrypt the resulting private key
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* @param {Boolean} [options.unlocked=false] The secret part of the generated key is unlocked
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* @param {Number} [options.keyExpirationTime=0] The number of seconds after the key creation time that the key expires
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* @return {module:key~Key}
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* @static
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*/
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export function reformat(options) {
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var secretKeyPacket, secretSubkeyPacket;
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return Promise.resolve().then(() => {
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options.keyType = options.keyType || enums.publicKey.rsa_encrypt_sign;
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if (options.keyType !== enums.publicKey.rsa_encrypt_sign) { // RSA Encrypt-Only and RSA Sign-Only are deprecated and SHOULD NOT be generated
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throw new Error('Only RSA Encrypt or Sign supported');
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}
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if (!options.passphrase) { // Key without passphrase is unlocked by definition
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options.unlocked = true;
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}
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if (String.prototype.isPrototypeOf(options.userIds) || typeof options.userIds === 'string') {
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options.userIds = [options.userIds];
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}
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var packetlist = options.privateKey.toPacketlist();
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for (var i = 0; i < packetlist.length; i++) {
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if (packetlist[i].tag === enums.packet.secretKey) {
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secretKeyPacket = packetlist[i];
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} else if (packetlist[i].tag === enums.packet.secretSubkey) {
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secretSubkeyPacket = packetlist[i];
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}
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}
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return wrapKeyObject(secretKeyPacket, secretSubkeyPacket, options);
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});
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}
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function wrapKeyObject(secretKeyPacket, secretSubkeyPacket, options) {
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// set passphrase protection
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if (options.passphrase) {
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secretKeyPacket.encrypt(options.passphrase);
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secretSubkeyPacket.encrypt(options.passphrase);
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}
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var packetlist = new packet.List();
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packetlist.push(secretKeyPacket);
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options.userIds.forEach(function(userId, index) {
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var userIdPacket = new packet.Userid();
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userIdPacket.read(util.str2Uint8Array(userId));
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var dataToSign = {};
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dataToSign.userid = userIdPacket;
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dataToSign.key = secretKeyPacket;
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var signaturePacket = new packet.Signature();
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signaturePacket.signatureType = enums.signature.cert_generic;
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signaturePacket.publicKeyAlgorithm = options.keyType;
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signaturePacket.hashAlgorithm = config.prefer_hash_algorithm;
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signaturePacket.keyFlags = [enums.keyFlags.certify_keys | enums.keyFlags.sign_data];
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signaturePacket.preferredSymmetricAlgorithms = [];
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// prefer aes256, aes128, then aes192 (no WebCrypto support: https://www.chromium.org/blink/webcrypto#TOC-AES-support)
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signaturePacket.preferredSymmetricAlgorithms.push(enums.symmetric.aes256);
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signaturePacket.preferredSymmetricAlgorithms.push(enums.symmetric.aes128);
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signaturePacket.preferredSymmetricAlgorithms.push(enums.symmetric.aes192);
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signaturePacket.preferredSymmetricAlgorithms.push(enums.symmetric.cast5);
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signaturePacket.preferredSymmetricAlgorithms.push(enums.symmetric.tripledes);
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signaturePacket.preferredHashAlgorithms = [];
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// prefer fast asm.js implementations (SHA-256, SHA-1)
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signaturePacket.preferredHashAlgorithms.push(enums.hash.sha256);
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signaturePacket.preferredHashAlgorithms.push(enums.hash.sha1);
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signaturePacket.preferredHashAlgorithms.push(enums.hash.sha512);
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signaturePacket.preferredCompressionAlgorithms = [];
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signaturePacket.preferredCompressionAlgorithms.push(enums.compression.zlib);
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signaturePacket.preferredCompressionAlgorithms.push(enums.compression.zip);
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if (index === 0) {
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signaturePacket.isPrimaryUserID = true;
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}
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if (config.integrity_protect) {
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signaturePacket.features = [];
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signaturePacket.features.push(1); // Modification Detection
|
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}
|
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if (options.keyExpirationTime > 0) {
|
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signaturePacket.keyExpirationTime = options.keyExpirationTime;
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signaturePacket.keyNeverExpires = false;
|
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}
|
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signaturePacket.sign(secretKeyPacket, dataToSign);
|
|
|
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packetlist.push(userIdPacket);
|
|
packetlist.push(signaturePacket);
|
|
|
|
});
|
|
|
|
var dataToSign = {};
|
|
dataToSign.key = secretKeyPacket;
|
|
dataToSign.bind = secretSubkeyPacket;
|
|
var subkeySignaturePacket = new packet.Signature();
|
|
subkeySignaturePacket.signatureType = enums.signature.subkey_binding;
|
|
subkeySignaturePacket.publicKeyAlgorithm = options.keyType;
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|
subkeySignaturePacket.hashAlgorithm = config.prefer_hash_algorithm;
|
|
subkeySignaturePacket.keyFlags = [enums.keyFlags.encrypt_communication | enums.keyFlags.encrypt_storage];
|
|
subkeySignaturePacket.sign(secretKeyPacket, dataToSign);
|
|
|
|
packetlist.push(secretSubkeyPacket);
|
|
packetlist.push(subkeySignaturePacket);
|
|
|
|
if (!options.unlocked) {
|
|
secretKeyPacket.clearPrivateMPIs();
|
|
secretSubkeyPacket.clearPrivateMPIs();
|
|
}
|
|
|
|
return new Key(packetlist);
|
|
}
|
|
|
|
/**
|
|
* Returns the preferred symmetric algorithm for a set of keys
|
|
* @param {Array<module:key~Key>} keys Set of keys
|
|
* @return {enums.symmetric} Preferred symmetric algorithm
|
|
*/
|
|
export function getPreferredSymAlgo(keys) {
|
|
var prioMap = {};
|
|
keys.forEach(function(key) {
|
|
var primaryUser = key.getPrimaryUser();
|
|
if (!primaryUser || !primaryUser.selfCertificate.preferredSymmetricAlgorithms) {
|
|
return config.encryption_cipher;
|
|
}
|
|
primaryUser.selfCertificate.preferredSymmetricAlgorithms.forEach(function(algo, index) {
|
|
var entry = prioMap[algo] || (prioMap[algo] = {prio: 0, count: 0, algo: algo});
|
|
entry.prio += 64 >> index;
|
|
entry.count++;
|
|
});
|
|
});
|
|
var prefAlgo = {prio: 0, algo: config.encryption_cipher};
|
|
for (var algo in prioMap) {
|
|
try {
|
|
if (algo !== enums.symmetric.plaintext &&
|
|
algo !== enums.symmetric.idea && // not implemented
|
|
enums.read(enums.symmetric, algo) && // known algorithm
|
|
prioMap[algo].count === keys.length && // available for all keys
|
|
prioMap[algo].prio > prefAlgo.prio) {
|
|
prefAlgo = prioMap[algo];
|
|
}
|
|
} catch (e) {}
|
|
}
|
|
return prefAlgo.algo;
|
|
}
|