❔ HMAC encrypt a string

Hey guys I'm trying to HMAC encrypt a string but the resulting hash is being rejected by the server I want to use it on. It's returning

400 Bad Request

400 Bad Request

: "Please provide a valid HMAC hash"
I'm trying to achieve this: https://docs.novu.co/notification-center/client/react/get-started#enabling-hmac-encryption

import { createHmac } from "crypto";

const hmacHash = createHmac("sha256", process.env.NOVU_API_KEY)
  .update(subscriberId)
  .digest("hex");

import { createHmac } from "crypto";

const hmacHash = createHmac("sha256", process.env.NOVU_API_KEY)
  .update(subscriberId)
  .digest("hex");

With my code looking like this:

using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(apiKey));
var hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(userId));
result.NotificationCenterHash = Convert.ToHexString(hash);

using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(apiKey));
var hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(userId));
result.NotificationCenterHash = Convert.ToHexString(hash);

I'm wondering if I'm just doing it wrong or if there's something else perhaps.. I triple checked the values I'm using and they should be correct

The hash that I output is

18A22B366AF133C8ADD62E471BB3F91984D12E495CD4EC33999DEE8B48722E39

18A22B366AF133C8ADD62E471BB3F91984D12E495CD4EC33999DEE8B48722E39

C#•3y ago•

15 replies

Jelle

❔ HMAC encrypt a string

Hey guys I'm trying to HMAC encrypt a string but the resulting hash is being rejected by the server I want to use it on. It's returning

400 Bad Request

400 Bad Request

: "Please provide a valid HMAC hash"
I'm trying to achieve this: https://docs.novu.co/notification-center/client/react/get-started#enabling-hmac-encryption

import { createHmac } from "crypto";

const hmacHash = createHmac("sha256", process.env.NOVU_API_KEY)
  .update(subscriberId)
  .digest("hex");

import { createHmac } from "crypto";

const hmacHash = createHmac("sha256", process.env.NOVU_API_KEY)
  .update(subscriberId)
  .digest("hex");

With my code looking like this:

using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(apiKey));
var hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(userId));
result.NotificationCenterHash = Convert.ToHexString(hash);

using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(apiKey));
var hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(userId));
result.NotificationCenterHash = Convert.ToHexString(hash);

I'm wondering if I'm just doing it wrong or if there's something else perhaps.. I triple checked the values I'm using and they should be correct

The hash that I output is

18A22B366AF133C8ADD62E471BB3F91984D12E495CD4EC33999DEE8B48722E39

18A22B366AF133C8ADD62E471BB3F91984D12E495CD4EC33999DEE8B48722E39

❔ HMAC encrypt a string

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