66 lines
2.1 KiB
JavaScript
66 lines
2.1 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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/* eslint class-methods-use-this: ["error", { "exceptMethods": ["read"] }] */
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/**
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* @requires enums
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*/
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import enums from '../enums';
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/**
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* Implementation of the strange "Marker packet" (Tag 10)
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*
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* {@link https://tools.ietf.org/html/rfc4880#section-5.8|RFC4880 5.8}:
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* An experimental version of PGP used this packet as the Literal
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* packet, but no released version of PGP generated Literal packets with this
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* tag. With PGP 5.x, this packet has been reassigned and is reserved for use as
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* the Marker packet.
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*
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* Such a packet MUST be ignored when received.
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* @memberof module:packet
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*/
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class MarkerPacket {
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constructor() {
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this.tag = enums.packet.marker;
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}
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/**
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* Parsing function for a literal data packet (tag 10).
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*
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* @param {String} input Payload of a tag 10 packet
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* @param {Integer} position
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* Position to start reading from the input string
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* @param {Integer} len
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* Length of the packet or the remaining length of
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* input at position
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* @returns {MarkerPacket} Object representation
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*/
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read(bytes) {
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if (bytes[0] === 0x50 && // P
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bytes[1] === 0x47 && // G
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bytes[2] === 0x50) { // P
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return true;
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}
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// marker packet does not contain "PGP"
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return false;
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}
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}
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export default MarkerPacket;
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