Help with HMAC-MD5 for webhook response in Make

[Viacheslav_Moroz]

Hi! I’m new to Make and I need to set up a webhook response that requires an HMAC-MD5 signature using my secret key.

Situation:

A payment system sends a webhook to my scenario.

To acknowledge it, I need to return a response containing an HMAC-MD5 signature.

The signature is calculated based on certain data (e.g., order number, amount, etc.) and my secret key.

Questions:

1. How can I generate an HMAC-MD5 signature with a secret key in Make for a webhook response?

2. How do I include this signature in the webhook response so the payment system accepts it as valid?

3. Are there any example formulas or steps for doing this in Make?

I would really appreciate a working example or guidance on how to do this correctly.

[Henk-Operative]

Hi @Viacheslav_Moroz,

Welcome! HMAC md5 is not something you see often anymore, it is has some flaws. Are you sure it is not SHA256?

Make has a built in md5() function, but it does not accept a key. (the SHA256 function does!). So if you need to calculate the HMAC md5 has, the best course of action is to use the code module in this setup:

What code you’ll should use, I’ll leave up to you.

Cheers,
Henk

[samliew]

Welcome to the Make community!

By any chance is your service Binance, Binance, Binance Futures, or Alibaba Cloud OSS?

If yes, your answer might already be in those previous discussions.

— @samliew