/* * Copyright 2018 Scytl Secure Electronic Voting SA * * All rights reserved * * See our extended copyright notice in *file 'Copyright.txt' which is part of this source code package */ /* jshint node:true */ 'use strict'; var DigitalEnvelopeService = require('./service'); var validator = require('./input-validator'); module.exports = { /** * Creates a new DigitalEnvelopeService object, which encapsulates a digital * envelope service. * * @function newService * @global * @param {Object} * [options] An object containing optional arguments. * @param {Policy} * [options.policy=Default policy] The cryptographic policy to * use. * @param {SymmetricCryptographyService} * [options.symmetricCryptographyService=Created internally] The * symmetric cryptography service to use. * @param {AsymmetricCryptographyService} * [options.asymmetricCryptographyService=Created internally] The * asymmetric cryptography service to use. * @returns {DigitalEnvelopeService} The new DigitalEnvelopeService object. * @throws {Error} * If the input data validation fails. * @example How to use a cryptographic policy that sets the key * length of the symmetric cipher used by the digital envelope to * 32 bytes * * var cryptoPolicy = require('scytl-cryptopolicy'); * var digitalEnvelope = require('scytl-digitalenvelope'); * * var myPolicy = cryptoPolicy.newInstance(); * * myPolicy.digitalEnvelope.symmetric.cipher.algorithm.AES_GCM.keyLengthBytes= * cryptoPolicy.options.digitalEnvelope.symmetric.cipher.algorithm.AES_GCM.keyLengthBytes.KL_32; * * var digitalEnvelopeService = digitalEnvelope.newService({policy: * myPolicy}); */ newService: function(options) { checkData(options); return new DigitalEnvelopeService(options); } }; function checkData(options) { options = options || {}; if (typeof options.policy !== 'undefined') { validator.checkIsObjectWithProperties( options.policy, 'Cryptographic policy provided to digital envelope service'); } if (typeof options.symmetricCryptographyService !== 'undefined') { validator.checkIsObjectWithProperties( options.symmetricCryptographyService, 'Symmetric cryptography service object provided to digital envelope service'); } if (typeof options.asymmetricCryptographyService !== 'undefined') { validator.checkIsObjectWithProperties( options.asymmetricCryptographyService, 'Asymmetric cryptography service object provided to digital envelope service'); } }