Let get started! This article assumes you are using your own code to perform the authentication to Azure Active Directory. IMPORTANT: So if your using Azure App Services or Azure Function Apps Authentication/Authorization feature, this article is not for you. You are developing a Asp.Net OWIN or Asp.Net Core Authentication web application and integrating it with Azure Active Directory. You run into some issues during the sign-in process with no…
Read MoreWalkthrough: MSAL.Net client calling Azure API App with Easy Auth enabled in a B2C tenant
In a previous blog post, I talked about how to use MSAL.Net client application to call an Azure Function App with Easy Auth enabled in a regular tenant. In this post, I’ll describe the process to use an MSAL.Net client application to call a Web API application with Easy Auth enabled in a B2C tenant. I assume you already have an API App created on Azure App Service. If you…
Read MoreReceiving error AADSTS7000218: The request body must contain the following parameter: ‘client_assertion’ or ‘client_secret’
Problem: An application receives the following error when authenticating to Azure Active Directory: { “error”: “invalid_client”, “error_description”: “AADSTS7000218: The request body must contain the following parameter: ‘client_assertion’ or ‘client_secret’.\r\nTrace ID: xxx\r\nCorrelation ID: xxx\r\nTimestamp: 2019-08-18 20:38:28Z”, “error_codes”: [7000218], …} What does this error mean? The error is what it said. When authenticating to Azure AD to get an access token, the client application is not providing…
Read MoreAADSTS5011 Error on Kubernetes container app running .Net Core code with an Ingress Controller
I recently worked with a customer who was receiving an AADSTS5011: The reply url specified in the request does not match the reply urls configured for the application on his .Net Core Kubernetes container application with an Ingress Controller. When running from the Docker environment, there was no issue however, the redirect URI was configured for http://localhost:someport . Once deployed, the redirect URI ( as seen in the address bar…
Read MoreWalkthrough: Using MSAL.Net to call an Azure Function App with Easy Auth enabled
In this post, I’ll walk through the steps for how to create an application using Microsoft Authentication Library for .Net (MSAL.Net) to call an Azure AD protected Azure Function App using Easy Auth (Azure App Service’ Authentication and Authorization feature). 1. Create an Azure Function with Easy Auth enabled: Assuming you already have an Azure Function App created (refer to https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-function-app-portal if you don’t know how to create one), go…
Read MoreUnderstanding Azure AD’s On-Behalf-Of flow (aka OBO flow)
Background Microsoft Azure Active Directory supports an OAuth2 protocol extension called On-Behalf-Of flow (OBO flow). This is documented at both the Microsoft Identity Platform V1 and V2 endpoint. The OBO flow is used in the following scenario. Both Web API 1 and Web API 2 are protected by Azure AD. A client application (could be a SPA app, a front-end Web Application, or a native application) signs a user into…
Read MoreCommon Microsoft First Party Apps resource table
The information below is taken from the manifest file in the App Registration portal Azure Resource Resource URL Resource App ID Azure AD Graph https://graph.windows.net/ 00000002-0000-0000-c000-000000000000 Microsoft Graph https://graph.microsoft.com/ 00000003-0000-0000-c000-000000000000 Azure Key Vault https://vault.azure.net cfa8b339-82a2-471a-a3c9-0fc0be7a4093 Azure Service Management https://management.azure.com/ 797f4846-ba00-4fd7-ba43-dac1f8f63013 Power BI Service https://analysis.windows.net/powerbi/api/ 00000009-0000-0000-c000-000000000000 Azure Storage https://storage.azure.com/ e406a681-f3d4-42a8-90b6-c2b029497af1 Azure DevOps https://app.vssps.visualstudio.com/ 499b84ac-1321-427f-aa17-267ca6975798 Office 365 Management API https://manage.office.com/ c5393580-f805-4401-95e8-94b7a6ef2fc2 Intune https://api.manage.microsoft.com/ c161e42e-d4df-4a3d-9b42-e7a3c31f59d4 SharePoint https://microsoft.sharepoint-df.com/ 00000003-0000-0ff1-ce00-000000000000 Exchange https://outlook.office365.com/ 00000002-0000-0ff1-ce00-000000000000 Note: for…
Read MoreInfinite redirect between OpenID Connect Application and Azure AD
Recently I came across an interesting infinite redirection problem between an OpenID Connect (OIDC) Application and Azure AD as demonstrated in the Fiddler screen shot below. After authentication to Azure AD, we are stuck in an infinite loop between the web site and Azure AD. Eventually the browser gives up and throws an error. This problem only occurs if I start browsing to the site by http protocol (frame 3).…
Read MoreRetrieving user information from Azure AD’s UserInfo Endpoints
In OpenId Connect (OIDC) we have the UserInfo endpoint, that’s specifically for the OIDC protocol and we cannot use with OAuth2 protocol. To use this endpoint in Azure AD we need a token, and without specifying the “Resource” parameter. How to obtain a token (V1) For the sake of this example we’ll use the auth code grant flow to request tokens, using Microsoft Identity Platform V1 endpoint. In a browser…
Read MoreUnderstanding the difference between application and delegated permissions from OAuth2 Authentication Flows perspective
It’s well documented in the Permissions and consent docs and the Developer Glossary page that there are 2 types of permissions for an access token: delegated permission and application permission. In simpler terms, delegated permission is the permission granted to a signed in user while application permission is the permission granted to an application. The main difference between the two is that the former requires a user to sign in…
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