/* * 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 MessageDigestService = require('./service'); var validator = require('./input-validator'); module.exports = { /** * Creates a new MessageDigestService object, which encapsulates a message * digiest service. * * @function newService * @global * @param {Object} * [options] An object containing optional arguments. * @param {Policy} * [options.policy=Default policy] The cryptographic policy to * use. * @returns {MessageDigestService} The new MessageDigestService object. * @throws {Error} * If the input data validation fails. * @example How to use a cryptographic policy that sets the * message digest hash algorithm to SHA512/224 * * var cryptoPolicy = require('scytl-cryptopolicy'); var messageDigest = * require('scytl-messagedigest'); * * var myPolicy = cryptoPolicy.newInstance(); * * myPolicy.primitives.messageDigest.algorithm = * cryptoPolicy.options.primitives.messageDigest.algorithm.SHA512_224; * * var messageDigestService = messageDigest.newService({policy: myPolicy}); */ newService: function(options) { checkData(options); return new MessageDigestService(options); } }; function checkData(options) { options = options || {}; if (typeof options.policy !== 'undefined') { validator.checkIsObjectWithProperties( options.policy, 'Cryptographic policy provided to message digest service'); } }