+ // GPG4Browsers - An OpenPGP implementation in javascript
+// Copyright (C) 2011 Recurity Labs GmbH
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+/**
+ * @requires crypto
+ * @requires enums
+ * @requires packet
+ * @requires type_keyid
+ * @requires key
+ * @module async_proxy
+ */
+
+var crypto = require('../crypto'),
+ packet = require('../packet'),
+ key = require('../key.js'),
+ type_keyid = require('../type/keyid.js'),
+ enums = require('../enums.js');
+
+var INITIAL_RANDOM_SEED = 50000, // random bytes seeded to worker
+ RANDOM_SEED_REQUEST = 20000; // random bytes seeded after worker request
+
+/**
+ * Initializes a new proxy and loads the web worker
+ * @constructor
+ * @param {String} path The path to the worker or 'openpgp.worker.js' by default
+ */
+function AsyncProxy(path) {
+ this.worker = new Worker(path || 'openpgp.worker.js');
+ this.worker.onmessage = this.onMessage.bind(this);
+ this.seedRandom(INITIAL_RANDOM_SEED);
+ // FIFO
+ this.tasks = [];
+}
+
+/**
+ * Message handling
+ */
+AsyncProxy.prototype.onMessage = function(event) {
+ var msg = event.data;
+ switch (msg.event) {
+ case 'method-return':
+ this.tasks.shift()(msg.err ? new Error(msg.err) : null, msg.data);
+ break;
+ case 'request-seed':
+ this.seedRandom(RANDOM_SEED_REQUEST);
+ break;
+ default:
+ throw new Error('Unknown Worker Event.');
+ }
+};
+
+/**
+ * Send message to worker with random data
+ * @param {Integer} size Number of bytes to send
+ */
+AsyncProxy.prototype.seedRandom = function(size) {
+ var buf = this.getRandomBuffer(size);
+ this.worker.postMessage({event: 'seed-random', buf: buf});
+};
+
+/**
+ * Get Uint8Array with random numbers
+ * @param {Integer} size Length of buffer
+ * @return {Uint8Array}
+ */
+AsyncProxy.prototype.getRandomBuffer = function(size) {
+ if (!size) return null;
+ var buf = new Uint8Array(size);
+ crypto.random.getRandomValues(buf);
+ return buf;
+};
+
+/**
+ * Terminates the worker
+ */
+AsyncProxy.prototype.terminate = function() {
+ this.worker.terminate();
+};
+
+/**
+ * Encrypts message text with keys
+ * @param {Array<module:key~Key>} keys array of keys, used to encrypt the message
+ * @param {String} text message as native JavaScript string
+ * @param {Function} callback receives encrypted ASCII armored message
+ */
+AsyncProxy.prototype.encryptMessage = function(keys, text, callback) {
+ keys = keys.map(function(key) {
+ return key.toPacketlist();
+ });
+ this.worker.postMessage({
+ event: 'encrypt-message',
+ keys: keys,
+ text: text
+ });
+ this.tasks.push(callback);
+};
+
+/**
+ * Signs message text and encrypts it
+ * @param {Array<module:key~Key>} publicKeys array of keys, used to encrypt the message
+ * @param {module:key~Key} privateKey private key with decrypted secret key data for signing
+ * @param {String} text message as native JavaScript string
+ * @param {Function} callback receives encrypted ASCII armored message
+ */
+AsyncProxy.prototype.signAndEncryptMessage = function(publicKeys, privateKey, text, callback) {
+ publicKeys = publicKeys.map(function(key) {
+ return key.toPacketlist();
+ });
+ privateKey = privateKey.toPacketlist();
+ this.worker.postMessage({
+ event: 'sign-and-encrypt-message',
+ publicKeys: publicKeys,
+ privateKey: privateKey,
+ text: text
+ });
+ this.tasks.push(callback);
+};
+
+/**
+ * Decrypts message
+ * @param {module:key~Key} privateKey private key with decrypted secret key data
+ * @param {module:message~Message} message the message object with the encrypted data
+ * @param {Function} callback receives decrypted message as as native JavaScript string
+ * or null if no literal data found
+ */
+AsyncProxy.prototype.decryptMessage = function(privateKey, message, callback) {
+ privateKey = privateKey.toPacketlist();
+ this.worker.postMessage({
+ event: 'decrypt-message',
+ privateKey: privateKey,
+ message: message
+ });
+ this.tasks.push(callback);
+};
+
+/**
+ * Decrypts message and verifies signatures
+ * @param {module:key~Key} privateKey private key with decrypted secret key data
+ * @param {Array<module:key~Key>} publicKeys public keys to verify signatures
+ * @param {module:message~Message} message the message object with signed and encrypted data
+ * @param {Function} callback receives decrypted message as as native JavaScript string
+ * with verified signatures or null if no literal data found
+ */
+AsyncProxy.prototype.decryptAndVerifyMessage = function(privateKey, publicKeys, message, callback) {
+ privateKey = privateKey.toPacketlist();
+ publicKeys = publicKeys.map(function(key) {
+ return key.toPacketlist();
+ });
+ this.worker.postMessage({
+ event: 'decrypt-and-verify-message',
+ privateKey: privateKey,
+ publicKeys: publicKeys,
+ message: message
+ });
+ this.tasks.push(function(err, data) {
+ if (data) {
+ data.signatures = data.signatures.map(function(sig) {
+ sig.keyid = type_keyid.fromClone(sig.keyid);
+ return sig;
+ });
+ }
+ callback(err, data);
+ });
+};
+
+/**
+ * Signs a cleartext message
+ * @param {Array<module:key~Key>} privateKeys private key with decrypted secret key data to sign cleartext
+ * @param {String} text cleartext
+ * @param {Function} callback receives ASCII armored message
+ */
+AsyncProxy.prototype.signClearMessage = function(privateKeys, text, callback) {
+ privateKeys = privateKeys.map(function(key) {
+ return key.toPacketlist();
+ });
+ this.worker.postMessage({
+ event: 'sign-clear-message',
+ privateKeys: privateKeys,
+ text: text
+ });
+ this.tasks.push(callback);
+};
+
+/**
+ * Verifies signatures of cleartext signed message
+ * @param {Array<module:key~Key>} publicKeys public keys to verify signatures
+ * @param {module:cleartext~CleartextMessage} message cleartext message object with signatures
+ * @param {Function} callback receives cleartext with status of verified signatures
+ */
+AsyncProxy.prototype.verifyClearSignedMessage = function(publicKeys, message, callback) {
+ publicKeys = publicKeys.map(function(key) {
+ return key.toPacketlist();
+ });
+ this.worker.postMessage({
+ event: 'verify-clear-signed-message',
+ publicKeys: publicKeys,
+ message: message
+ });
+ this.tasks.push(function(err, data) {
+ if (data) {
+ data.signatures = data.signatures.map(function(sig) {
+ sig.keyid = type_keyid.fromClone(sig.keyid);
+ return sig;
+ });
+ }
+ callback(err, data);
+ });
+};
+
+/**
+ * Generates a new OpenPGP key pair. Currently only supports RSA keys.
+ * Primary and subkey will be of same type.
+ * @param {module:enums.publicKey} keyType to indicate what type of key to make.
+ * RSA is 1. See {@link http://tools.ietf.org/html/rfc4880#section-9.1}
+ * @param {Integer} numBits number of bits for the key creation. (should be 1024+, generally)
+ * @param {String} userId assumes already in form of "User Name <username@email.com>"
+ * @param {String} passphrase The passphrase used to encrypt the resulting private key
+ * @param {Function} callback receives object with key and public and private armored texts
+ */
+AsyncProxy.prototype.generateKeyPair = function(keyType, numBits, userId, passphrase, callback) {
+ this.worker.postMessage({
+ event: 'generate-key-pair',
+ keyType: keyType,
+ numBits: numBits,
+ userId: userId,
+ passphrase: passphrase
+ });
+ this.tasks.push(function(err, data) {
+ if (data) {
+ var packetlist = packet.List.fromStructuredClone(data.key);
+ data.key = new key.Key(packetlist);
+ }
+ callback(err, data);
+ });
+};
+
+/**
+ * Decrypts secret part of all secret key packets of key.
+ * @param {module:key~Key} privateKey private key with encrypted secret key data
+ * @param {String} password password to unlock the key
+ * @param {Function} callback receives decrypted key
+ */
+AsyncProxy.prototype.decryptKey = function(privateKey, password, callback) {
+ privateKey = privateKey.toPacketlist();
+ this.worker.postMessage({
+ event: 'decrypt-key',
+ privateKey: privateKey,
+ password: password
+ });
+ this.tasks.push(function(err, data) {
+ if (data) {
+ var packetlist = packet.List.fromStructuredClone(data);
+ data = new key.Key(packetlist);
+ }
+ callback(err, data);
+ });
+};
+
+/**
+ * Decrypts secret part of key packets matching array of keyids.
+ * @param {module:key~Key} privateKey private key with encrypted secret key data
+ * @param {Array<module:type/keyid>} keyIds
+ * @param {String} password password to unlock the key
+ * @param {Function} callback receives decrypted key
+ */
+AsyncProxy.prototype.decryptKeyPacket = function(privateKey, keyIds, password, callback) {
+ privateKey = privateKey.toPacketlist();
+ this.worker.postMessage({
+ event: 'decrypt-key-packet',
+ privateKey: privateKey,
+ keyIds: keyIds,
+ password: password
+ });
+ this.tasks.push(function(err, data) {
+ if (data) {
+ var packetlist = packet.List.fromStructuredClone(data);
+ data = new key.Key(packetlist);
+ }
+ callback(err, data);
+ });
+};
+
+module.exports = AsyncProxy;
+
+
+