Circleci Webhook Secret token decryption or validation

fmc100 · August 16, 2021, 5:00pm

There is nothing in the docs about how I would validate the secret token from a circleci webhook.

Currently, when you enter one it adds a header to the request Circleci-Signature v1=*********.

I have no idea how to validate that this is from circleci nor how to decode it and I didn’t see anything in the docs describing it either.

Any help would be greatly appreciated, thanks.

aaronclark · August 20, 2021, 2:49am

Hi @fmc100 ,

Currently only the “v1” signature will be provided, and it is computed by
running HMAC-SHA256 on the request body, using the configured signing secret as
the secret key. We are working on updating the documentation, but here is a sample that shows how to decode/verify the signature:

github.com

CircleCI-Public/webhooks-consumer-sample/blob/main/server.js

require("dotenv").config();
const express = require("express");
const path = require("path");
const app = express();
const cors = require('cors');
const axios = require("axios");
const Pusher = require('pusher')
const crypto = require("crypto")

app.use(cors());

app.use(express.urlencoded({ extended: false }));
app.use(express.json());

let port = process.env.PORT || "5000";

const pusher = new Pusher({
    appId: "1209282",
    key: "3ad5dab74e212a6a3009",
    secret: "59d30430ab61f90f42ad",

This file has been truncated. show original

If you have any additional questions please feel free to let me know!

Best Regards

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Circleci Webhook Secret token decryption or validation

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