3612fc12dc
and make the high-level API accessible from an asynchronous proxy. Entropy is seeded to worker on each generateKeyPair() call. Allow serialization of packets and custom types for messaging API.
77 lines
2.6 KiB
JavaScript
77 lines
2.6 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 2.1 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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* Implementation of the Symmetrically Encrypted Data Packet (Tag 9)<br/>
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* <br/>
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* {@link http://tools.ietf.org/html/rfc4880#section-5.7|RFC4880 5.7}: The Symmetrically Encrypted Data packet contains data encrypted
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* with a symmetric-key algorithm. When it has been decrypted, it contains other
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* packets (usually a literal data packet or compressed data packet, but in
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* theory other Symmetrically Encrypted Data packets or sequences of packets
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* that form whole OpenPGP messages).
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* @requires crypto
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* @requires enums
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* @module packet/symmetrically_encrypted
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*/
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module.exports = SymmetricallyEncrypted;
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var crypto = require('../crypto'),
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enums = require('../enums.js');
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/**
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* @constructor
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*/
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function SymmetricallyEncrypted() {
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this.tag = enums.packet.symmetricallyEncrypted;
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this.encrypted = null;
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/** Decrypted packets contained within.
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* @type {module:packet/packetlist} */
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this.packets = null;
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}
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SymmetricallyEncrypted.prototype.read = function (bytes) {
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this.encrypted = bytes;
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};
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SymmetricallyEncrypted.prototype.write = function () {
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return this.encrypted;
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};
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/**
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* Symmetrically decrypt the packet data
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*
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* @param {module:enums.symmetric} sessionKeyAlgorithm
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* Symmetric key algorithm to use // See {@link http://tools.ietf.org/html/rfc4880#section-9.2|RFC4880 9.2}
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* @param {String} key
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* Key as string with the corresponding length to the
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* algorithm
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*/
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SymmetricallyEncrypted.prototype.decrypt = function (sessionKeyAlgorithm, key) {
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var decrypted = crypto.cfb.decrypt(
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sessionKeyAlgorithm, key, this.encrypted, true);
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this.packets.read(decrypted);
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};
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SymmetricallyEncrypted.prototype.encrypt = function (algo, key) {
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var data = this.packets.write();
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this.encrypted = crypto.cfb.encrypt(
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crypto.getPrefixRandom(algo), algo, data, key, true);
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};
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