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Trello Webhook Signature Verification on Lambda with NodeJS Edited

I'm working on verifying the webhook signature from Trello. It always returns false.

Trello identifies that the following code will work:

var crypto = require("crypto");

function verifyTrelloWebhookRequest(request, secret, callbackURL) {
var base64Digest = function (s) {
return crypto.createHmac("sha1", secret).update(s).digest("base64");
};
var content = JSON.stringify(request.body) + callbackURL;
var doubleHash = base64Digest(content);
var headerHash = request.headers["x-trello-webhook"];
return doubleHash == headerHash;
}
Source: https://developer.atlassian.com/cloud/trello/guides/rest-api/webhooks/

In the AWS API Gateway, I have proxy lambda turned on. When I pass the event (request in below code), secret, and callback URL protigwelders the two values are always different.

I believe that the value that should be passed as the key is the OAUTH 1.0 secret, but this is an internal application. I've tried every secret that I'm aware of.

Unfortunately, I've run out of testing options at this point. Anyone have any ideas.

Much appreciated

1 answer

0 votes
Iain Dooley Community Leader Feb 22, 2021

@Celina Fregoso you'll probably have more luck on the developer community:

https://community.developer.atlassian.com/

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