Azure AD OAuth2 toolkit

This module provides some helper functions to work with Azure AD OAuth2 endpoint without the need to construct URL manually.

Installation

The easiest way to use this module is to download it from PowerShell Gallery:

Install-Module -Name Oauth2Toolkit

Supported Grant Type Flows

OAuth 2 Flow	Function	Notes
Authorization Code Grant	Invoke-CodeGrantFlow
Device Code	Invoke-DeviceCodeFlow
Password	Invoke-ResourceOwnerPasswordGrantFlow
On behalf of	Invoke-OnBehalfOfFlow	https://docs.microsoft.com/cs-cz/azure/active-directory/develop/v2-oauth2-on-behalf-of-flow

Example use

Obtain access token for the application:

$response = Invoke-CodeGrantFlow -RedirectUrl "http://localhost:8080/auth" -ClientId "<AppId>" -ClientSecret "<AppSecret>" -Tenant "tenant.onmicrosoft.com" -Resource "<AppId>" -AlwaysPrompt $true

And use the returned Access Token to get resource specific Access Tokens for multiple services on behalf of the user:

$graphAuthenticationHeaders = Invoke-OnBehalfOfFlow -Tenant "tenant.onmicrosoft.com" -ClientId "<AppId>" -ClientSecret "<AppSecret>" -AccessToken $response.access_token -Resource "https://graph.microsoft.com" | ConvertTo-AuthorizationHeaders

Invoke-RestMethod -Method Get -Uri "https://graph.microsoft.com/v1.0/me" -Headers $graphAuthenticationHeaders