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65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
// OpenPGP.js - An OpenPGP implementation in javascript
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// Copyright (C) 2022 Proton AG
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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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import { getRandomBytes } from '../crypto';
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import enums from '../enums';
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/**
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* Implementation of the Padding Packet
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*
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* {@link https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh#name-padding-packet-tag-21}:
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* Padding Packet
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*/
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class PaddingPacket {
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static get tag() {
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return enums.packet.padding;
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}
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constructor() {
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this.padding = null;
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}
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/**
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* Read a padding packet
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* @param {Uint8Array | ReadableStream<Uint8Array>} bytes
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*/
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read(bytes) { // eslint-disable-line @typescript-eslint/no-unused-vars
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// Padding packets are ignored, so this function is never called.
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}
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/**
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* Write the padding packet
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* @returns {Uint8Array} The padding packet.
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*/
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write() {
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return this.padding;
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}
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/**
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* Create random padding.
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* @param {Number} length - The length of padding to be generated.
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* @throws {Error} if padding generation was not successful
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* @async needed to avoid breaking change until next major release
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*/
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// eslint-disable-next-line @typescript-eslint/require-await
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async createPadding(length) {
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this.padding = getRandomBytes(length);
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}
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}
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export default PaddingPacket;
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