67 lines
2.3 KiB
JavaScript
67 lines
2.3 KiB
JavaScript
// OpenPGP.js - An OpenPGP implementation in javascript
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// Copyright (C) 2016 Tankred Hase
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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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* Implementation of the Symmetrically Encrypted AEAD Protected Data Packet <br/>
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* <br/>
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* {@link https://tools.ietf.org/html/draft-ford-openpgp-format-00#section-2.1}: AEAD Protected Data Packet
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*/
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'use strict';
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import util from '../util.js';
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import crypto from '../crypto';
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import enums from '../enums.js';
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const IV_LEN = crypto.gcm.ivLength;
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/**
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* @constructor
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*/
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export default function SymEncryptedAEADProtected() {
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this.tag = enums.packet.symEncryptedAEADProtected;
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this.iv = null;
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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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SymEncryptedAEADProtected.prototype.read = function (bytes) {
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this.iv = bytes.subarray(0, IV_LEN);
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this.encrypted = bytes.subarray(IV_LEN, bytes.length);
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};
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SymEncryptedAEADProtected.prototype.write = function () {
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return util.concatUint8Array([this.iv, this.encrypted]);
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};
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SymEncryptedAEADProtected.prototype.decrypt = function (sessionKeyAlgorithm, key) {
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return crypto.gcm.decrypt(sessionKeyAlgorithm, this.encrypted, key, this.iv).then(decrypted => {
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this.packets.read(decrypted);
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});
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};
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SymEncryptedAEADProtected.prototype.encrypt = function (sessionKeyAlgorithm, key) {
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var data = this.packets.write();
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this.iv = crypto.random.getRandomValues(new Uint8Array(IV_LEN));
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return crypto.gcm.encrypt(sessionKeyAlgorithm, data, key, this.iv).then(encrypted => {
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this.encrypted = encrypted;
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});
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};
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