Azure Function authentication using Azure Active Directory

Question

I wanted to enable authentication on Azure Functions. So, I decided to go with EasyAuth (Authentication/Authorization link under platform features) and was successfully able

Answer 1

Regarding the issue, you need to create a client app to call your Azure function. The detailed steps are as Below.

1. Configure Azure AD for Azure Function. Please refer to https://docs.microsoft.com/en-us/azure/azure-functions/functions-how-to-use-azure-function-app-settings#auth.

   i. Go to Integrate of your trigger, set Authorization level to Anonymous

   ii. Got to Authentication / Authorization and configure Azure AD

2. Register a clent application in AD on the azure portal. For more details, please refer to https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-v1-integrate-apps-with-azure-ad.

   a. Open the Azure Active Directory and click the App registrations , choose New application registration.

   b. Enter your Name and Redirect URL, you can write anything. Then click create button.

   c. Settings-> Required permissions -> add, choose the application you use in the step1

   d. Select permission -> APPLICAION PERMISSIONS ->Select->Done->Grant Permissions->Yes

   e. Create a key and copy it

   f. Copy the Application ID

3. Test

Get Token:

METHOD: POST

Url : https://login.microsoftonline.com/your directory ID/oauth2/token 

HEADERS:  Content-Type : application/x-www-form-urlencoded

BODY:
grant_type+=client_credentials&resource+=”your Function APP ID”&client_id+++++=”the application that your register  id”&client_secret+=”the key you create”

Test Function:

METHOD: Get

Url : https://.azurewebsites.net/api/HttpTriggerCSharp1?name=azure

HEADERS:  Authorization : Bearer