pull-request-evaluator/lib/github-webhook/authenticate.js

/**
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const crypto = require('node:crypto');
const envHelper = require('../config/env');

/* sign received payload to compare */
function signPayload(data) {
    const buffer = Buffer.from(data, 'utf8');
    let secret = envHelper.getWebhookSecret();
    return 'sha1=' + crypto.createHmac('sha1', secret).update(buffer).digest('hex');
}

module.exports.signPayload = signPayload;