fecr/build/fecr/signer.js

Modulo de comprobantes electrónicos para el API del Ministerio de Hacienda de Costa Rica versión 4.3

"use strict";

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

var {
  Crypto
} = require("@peculiar/webcrypto");

var xadesjs = require("xadesjs");

var {
  XMLSerializer
} = require("xmldom-alpha");

var pkcs12 = require("./pkcs12.js");

var crypto = new Crypto();
xadesjs.Application.setEngine("NodeJS", new Crypto());

function singFromKeyPair(_x, _x2) {
  return _singFromKeyPair.apply(this, arguments);
} // eslint-disable-next-line max-len


function _singFromKeyPair() {
  _singFromKeyPair = _asyncToGenerator(function* (keyPair, xmlString) {
    var hash = "SHA-256";
    var alg = {
      name: "RSASSA-PKCS1-v1_5",
      hash
    }; // Read cert

    var {
      x509
    } = keyPair; // Read key

    var keyDer = pkcs12.pem2der(keyPair.key);
    var key = yield crypto.subtle.importKey("pkcs8", keyDer.buffer, alg, false, ["sign"]); // XAdES-EPES
    // eslint-disable-next-line new-cap

    var xml = xadesjs.Parse(xmlString);
    var xadesXml = new xadesjs.SignedXml(); // eslint-disable-next-line new-cap

    var signature = yield xadesXml.Sign( // Signing document
    alg, // algorithm
    key, // key
    xml, // document
    {
      // options
      x509: [x509],
      references: [{
        id: "r-id-1",
        uri: "",
        hash,
        transforms: ["enveloped"]
      }],
      policy: {
        hash,
        identifier: {
          value: "https://cdn.comprobanteselectronicos.go.cr/xml-schemas/v4.3/facturaElectronica"
        }
      },
      signingCertificate: x509
    }); // append signature
    // eslint-disable-next-line new-cap

    xml.documentElement.appendChild(signature.GetXml()); // serialize XML

    var oSerializer = new XMLSerializer();
    var sXML = oSerializer.serializeToString(xml);
    return sXML.toString();
    /**/
  });
  return _singFromKeyPair.apply(this, arguments);
}

module.exports.signXmlString = (xml, options) => new Promise((resolve, reject) => {
  var {
    keyPair
  } = options;
  var {
    p12
  } = options;

  if (keyPair) {
    singFromKeyPair(keyPair, xml).then(xmlSigned => {
      resolve(xmlSigned);
    }).catch(err => {
      reject(err);
    });
  } else if (p12) {
    pkcs12.getKeyPair(p12.path, p12.pass).then(newKeyPair => singFromKeyPair(newKeyPair, xml)).then(xmlSigned => {
      resolve(xmlSigned);
    }).catch(err => {
      reject(err);
    });
  } else {
    reject(new Error("keyPair or p12 must to exist"));
  }
});