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// 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
import { armor, unarmor } from './encoding/armor';import { PacketList, SignaturePacket } from './packet';import enums from './enums';import util from './util';import defaultConfig from './config';
// A Signature can contain the following packetsconst allowedPackets = /*#__PURE__*/ util.constructAllowedPackets([SignaturePacket]);
/** * Class that represents an OpenPGP signature. */export class Signature {  /**   * @param {PacketList} packetlist - The signature packets   */  constructor(packetlist) {    this.packets = packetlist || new PacketList();  }
  /**   * Returns binary encoded signature   * @returns {ReadableStream<Uint8Array>} Binary signature.   */  write() {    return this.packets.write();  }
  /**   * Returns ASCII armored text of signature   * @param {Object} [config] - Full configuration, defaults to openpgp.config   * @returns {ReadableStream<String>} ASCII armor.   */  armor(config = defaultConfig) {    return armor(enums.armor.signature, this.write(), undefined, undefined, undefined, config);  }
  /**   * Returns an array of KeyIDs of all of the issuers who created this signature   * @returns {Array<KeyID>} The Key IDs of the signing keys   */  getSigningKeyIDs() {    return this.packets.map(packet => packet.issuerKeyID);  }}
/** * reads an (optionally armored) OpenPGP signature and returns a signature object * @param {Object} options * @param {String} [options.armoredSignature] - Armored signature to be parsed * @param {Uint8Array} [options.binarySignature] - Binary signature to be parsed * @param {Object} [options.config] - Custom configuration settings to overwrite those in [config]{@link module:config} * @returns {Promise<Signature>} New signature object. * @async * @static */export async function readSignature({ armoredSignature, binarySignature, config, ...rest }) {  config = { ...defaultConfig, ...config };  let input = armoredSignature || binarySignature;  if (!input) {    throw new Error('readSignature: must pass options object containing `armoredSignature` or `binarySignature`');  }  if (armoredSignature && !util.isString(armoredSignature)) {    throw new Error('readSignature: options.armoredSignature must be a string');  }  if (binarySignature && !util.isUint8Array(binarySignature)) {    throw new Error('readSignature: options.binarySignature must be a Uint8Array');  }  const unknownOptions = Object.keys(rest); if (unknownOptions.length > 0) throw new Error(`Unknown option: ${unknownOptions.join(', ')}`);
  if (armoredSignature) {    const { type, data } = await unarmor(input, config);    if (type !== enums.armor.signature) {      throw new Error('Armored text not of type signature');    }    input = data;  }  const packetlist = await PacketList.fromBinary(input, allowedPackets, config);  return new Signature(packetlist);}