Add sha256 hashing function with a secret and hex output

[dhover]

In a RESTful call I need to hash the data with a secret according to the sha256 algoritm.
On the server side the php function call hash_hmac('sha256', $data, $secret, false) is being used.

Syntax server side php function:

hash_hmac(
    [string] $algo,
    [string] $data,
    [string] $key,
    [bool] $binary = [false]
)

So the idea was to add an extra function to Home Assistant - Spook to make this sha256 hashing algoritm with a secret possible.
The output should be hex digits (so binary=false).