Azure IoT DPS - Enrollment Group - Create Or Update - Rest API

Question

It Seems Rest API calls are not working for Azure - DPS Enrollment group. No response from the API call in the postman.

Followed the below URL

https://learn.microsoft.com/en-us/rest/api/iot-dps/service/enrollment-group/create-or-update?view=rest-iot-dps-service-2021-06-01

If you're able to execute REST API call then, Please let me know.

Answer 1

You would need to generate a security token for Service API authentication. You can find the sample needed to generate token from article Service API authentication. Here is the sample I have tested for my token generation.

from base64 import b64encode, b64decode
from hashlib import sha256
from time import time
from urllib.parse import quote_plus, urlencode
from hmac import HMAC
import requests
import json


def main():
    ttl = time() + 3600
    uri = '{yourdpsservicename}.azure-devices-provisioning.net/enrollmentGroups'
    sign_key = ("%s\n%d" % ((quote_plus(uri)), int(ttl))).encode('utf-8')
    #sign_key = "%s\n%d" % ((quote_plus(uri)), int(ttl))
    print(sign_key)
    signature = b64encode(HMAC(b64decode('key'), sign_key, sha256).digest())

    rawtoken = {
        'sr' :  uri,
        'sig': signature,
        'se' : str(int(ttl)),
        'skn' : 'provisioningserviceowner'
    }

    print('SharedAccessSignature ' + urlencode(rawtoken))




if __name__ == "__main__":
    main()

Please ensure to replace your DPS service name in the URI and the key value in the signature

You should get a signature similar to below value.

Add this token to the postman Authorization header. Find the below image for reference.

The API also requires you to pass Attestation mechanism for your enrollment. I have tested the API call using Symmetric Key attestation by passing the keys as following in the request body

As you can see, the API returns 200 OK response and gives details on the Enrollment group. The created enrollment group can be validated from the Azure portal DPS Manage Enrollments tab.

Hope this helps!