@kinde-oss/kinde-nodejs-sdk/dist/sdk/utils/Utils.js

Kinde Nodejs SDK allows integrate with Express server using middleware, helpers function

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getSessionId = getSessionId;
exports.parseJWT = parseJWT;
exports.pkceChallengeFromVerifier = pkceChallengeFromVerifier;
exports.randomString = randomString;
var _crypto = _interopRequireDefault(require("crypto"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0); } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i["return"] && (_r = _i["return"](), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
/**
 * Generates a random string using the crypto module in Node.js
 * @returns {string} a random string of 28 hexadecimal characters
 */
function randomString() {
  return _crypto["default"].randomBytes(28).toString('hex');
}

/**
 * Generates SHA-256 hash of the input string.
 * @param {string} plain - The input string to be hashed.
 * @return {Buffer} - The generated hash as a buffer object.
 */
function sha256(plain) {
  var encoder = new TextEncoder();
  var data = encoder.encode(plain);
  return _crypto["default"].createHash('sha256').update(data).digest();
}

/**
 * Converts a binary string to a base64 URL encoded string
 * @param {string} str - The binary string to encode
 * @returns {string} The base64 URL encoded string
 */
function base64UrlEncode(str) {
  return Buffer.from(str).toString('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}

/**
 * Function to generate a PKCE challenge from the codeVerifier
 * @param {string} codeVerifier - The verifier used to generate the PKCE challenge
 * @returns {string} A base64 URL encoded SHA-256 hash of the verifier
 */
function pkceChallengeFromVerifier(codeVerifier) {
  var hashed = sha256(codeVerifier);
  return base64UrlEncode(hashed);
}

/**
 * parseJWT - a function to parse a JSON Web Token (JWT)
 * @param {string} token - the JWT to parse
 * @returns {Object|null} - the JSON object represented by the token or null if the parsing fails
 */
function parseJWT(token) {
  if (typeof token !== 'string') {
    throw new Error('Token must be a string');
  }
  var parts = token.split('.');
  if (parts.length !== 3) {
    throw new Error('Invalid token format');
  }
  var base64Payload = parts[1];
  try {
    return JSON.parse(Buffer.from(base64Payload, 'base64').toString('utf8'));
  } catch (error) {
    return null;
  }
}

/**
 * Returns an object with key-value pairs of cookies extracted from the request headers
 * @param {Object} request - The HTTP request object that contains headers with cookie information
 * @returns {Object} - An object containing key-value pairs of cookies
 */
function getCookie(request) {
  var cookies = {};
  var cookieString = request.headers && request.headers.cookie;
  if (cookieString) {
    cookieString.split(';').forEach(function (cookie) {
      var _cookie$trim$split = cookie.trim().split('='),
        _cookie$trim$split2 = _slicedToArray(_cookie$trim$split, 2),
        name = _cookie$trim$split2[0],
        value = _cookie$trim$split2[1];
      cookies[name] = value;
    });
  }
  return cookies;
}

/**
 * Returns the session ID if it exists in the cookie header of the HTTP request object, otherwise generates a new session ID and returns it.
 * @param {Object} request - The HTTP request object
 * @returns {string} - A session ID string
 */
function getSessionId(request) {
  var _request$headers;
  if (!((_request$headers = request.headers) !== null && _request$headers !== void 0 && _request$headers.cookie)) {
    var sessionId = _crypto["default"].randomBytes(16).toString('hex');
    return sessionId;
  }
  var cookies = getCookie(request);
  return cookies.kindeSessionId || _crypto["default"].randomBytes(16).toString('hex');
}