node-red-contrib-line-signature-validator/dst/line-signature-validator.js

This node is to verify signature of incoming message of LINE messaging API.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _crypto = require('crypto');

var _crypto2 = _interopRequireDefault(_crypto);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

exports.default = function (RED) {
  var LINESignatureValidator = function LINESignatureValidator(config) {
    RED.nodes.createNode(this, config);
    var node = this;
    this.on('input', function (msg) {
      var msgs = [msg, null];
      var body = msg.payload;
      var signature = _crypto2.default.createHmac('SHA256', config.channelSecret).update(Buffer.from(JSON.stringify(body))).digest('base64');
      if (msg.req.headers['x-line-signature'] !== signature) msgs.reverse();
      node.send(msgs);
    });
  };
  RED.nodes.registerType('validator', LINESignatureValidator);
};

module.exports = exports['default'];