mirror of
https://github.com/openpgpjs/openpgpjs.git
synced 2025-11-24 14:35:51 +00:00
b672f1936a
Remove var, for let or const if possible, clean some syntax, enforce one var per declaration and semicolons
102 lines
4.4 KiB
JavaScript
102 lines
4.4 KiB
JavaScript
// 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 3.0 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
|
|
|
|
/**
|
|
* Implementation of the One-Pass Signature Packets (Tag 4)<br/>
|
|
* <br/>
|
|
* {@link https://tools.ietf.org/html/rfc4880#section-5.4|RFC4880 5.4}: The One-Pass Signature packet precedes the signed data and contains
|
|
* enough information to allow the receiver to begin calculating any
|
|
* hashes needed to verify the signature. It allows the Signature
|
|
* packet to be placed at the end of the message, so that the signer
|
|
* can compute the entire signed message in one pass.
|
|
* @requires util
|
|
* @requires enums
|
|
* @requires type/keyid
|
|
* @module packet/one_pass_signature
|
|
*/
|
|
|
|
import util from '../util.js';
|
|
import enums from '../enums.js';
|
|
import type_keyid from '../type/keyid.js';
|
|
|
|
/**
|
|
* @constructor
|
|
*/
|
|
export default function OnePassSignature() {
|
|
this.tag = enums.packet.onePassSignature; // The packet type
|
|
this.version = null; // A one-octet version number. The current version is 3.
|
|
this.type = null; // A one-octet signature type. Signature types are described in {@link https://tools.ietf.org/html/rfc4880#section-5.2.1|RFC4880 Section 5.2.1}.
|
|
this.hashAlgorithm = null; // A one-octet number describing the hash algorithm used. (See {@link https://tools.ietf.org/html/rfc4880#section-9.4|RFC4880 9.4})
|
|
this.publicKeyAlgorithm = null; // A one-octet number describing the public-key algorithm used. (See {@link https://tools.ietf.org/html/rfc4880#section-9.1|RFC4880 9.1})
|
|
this.signingKeyId = null; // An eight-octet number holding the Key ID of the signing key.
|
|
this.flags = null; // A one-octet number holding a flag showing whether the signature is nested. A zero value indicates that the next packet is another One-Pass Signature packet that describes another signature to be applied to the same message data.
|
|
}
|
|
|
|
/**
|
|
* parsing function for a one-pass signature packet (tag 4).
|
|
* @param {Uint8Array} bytes payload of a tag 4 packet
|
|
* @return {module:packet/one_pass_signature} object representation
|
|
*/
|
|
OnePassSignature.prototype.read = function (bytes) {
|
|
let mypos = 0;
|
|
// A one-octet version number. The current version is 3.
|
|
this.version = bytes[mypos++];
|
|
|
|
// A one-octet signature type. Signature types are described in
|
|
// Section 5.2.1.
|
|
this.type = enums.read(enums.signature, bytes[mypos++]);
|
|
|
|
// A one-octet number describing the hash algorithm used.
|
|
this.hashAlgorithm = enums.read(enums.hash, bytes[mypos++]);
|
|
|
|
// A one-octet number describing the public-key algorithm used.
|
|
this.publicKeyAlgorithm = enums.read(enums.publicKey, bytes[mypos++]);
|
|
|
|
// An eight-octet number holding the Key ID of the signing key.
|
|
this.signingKeyId = new type_keyid();
|
|
this.signingKeyId.read(bytes.subarray(mypos, mypos + 8));
|
|
mypos += 8;
|
|
|
|
// A one-octet number holding a flag showing whether the signature
|
|
// is nested. A zero value indicates that the next packet is
|
|
// another One-Pass Signature packet that describes another
|
|
// signature to be applied to the same message data.
|
|
this.flags = bytes[mypos++];
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* creates a string representation of a one-pass signature packet
|
|
* @return {Uint8Array} a Uint8Array representation of a one-pass signature packet
|
|
*/
|
|
OnePassSignature.prototype.write = function () {
|
|
const start = new Uint8Array([3, enums.write(enums.signature, this.type),
|
|
enums.write(enums.hash, this.hashAlgorithm),
|
|
enums.write(enums.publicKey, this.publicKeyAlgorithm)]);
|
|
|
|
const end = new Uint8Array([this.flags]);
|
|
|
|
return util.concatUint8Array([start, this.signingKeyId.write(), end]);
|
|
};
|
|
|
|
/**
|
|
* Fix custom types after cloning
|
|
*/
|
|
OnePassSignature.prototype.postCloneTypeFix = function() {
|
|
this.signingKeyId = type_keyid.fromClone(this.signingKeyId);
|
|
};
|