How to use SHA256-HMAC in python code?

Question

I am taking message and key from this URL

import hmac
import hashlib
import base64
my = "/api/embedded_dashboard?data=%7B%22dashboard%22%3A7863%2C%22embed%22%3A%22v2%22%2C%22filters%22%3A%5B%7B%22name%22%3A%22Filter1%22%2C%22value%22%3A%22value1%22%7D%2C%7B%22name%22%3A%22Filter2%22%2C%22value%22%3A%221234%22%7D%5D%7D"
key = "e179017a-62b0-4996-8a38-e91aa9f1"
print(hashlib.sha256(my + key).hexdigest())

I am getting this result:

2df1d58a56198b2a9267a9955c31291cd454bdb3089a7c42f5d439bbacfb3b88

Expecting result:

adcb671e8e24572464c31e8f9ffc5f638ab302a0b673f72554d3cff96a692740

Answer 1

You are not making use of hmac at all in your code.

Typical way to use hmac, construct an HMAC object from your key, message and identify the hashing algorithm by passing in its constructor:

h = hmac.new( key, my, hashlib.sha256 )
print( h.hexdigest() )

That should output

adcb671e8e24572464c31e8f9ffc5f638ab302a0b673f72554d3cff96a692740

for your example data.