PowerShell

SharePoint OAuth2 Client Credentials Authentication

Demonstrates how to authenticate with OAuth 2.0 using the client credentials grant type. This is for SharePoint Online which is the cloud-based service provided by Microsoft as part of Office 365. (Users access SharePoint Online through a web browser, and the service is hosted on Microsoft's servers.) PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$http = New-Object Chilkat.Http

# Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
# access token as needed.
$jsonOAuthCC = New-Object Chilkat.JsonObject

# --------------------------------------------------------------------------------------------------------
# You'll need to have registered an app in Azure beforehand.
# See How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
# --------------------------------------------------------------------------------------------------------

# Use the values from your App Registration in Azure.
$jsonOAuthCC.UpdateString("client_id","CLIENT_ID")
$jsonOAuthCC.UpdateString("client_secret","SECRET_VALUE")

# You'll always use this scope for client credentials, because the allowed actions
# are determined by the App Permissions defined when you registered the app in Azure.
$jsonOAuthCC.UpdateString("scope","https://graph.microsoft.com/.default")

# The token endpoint includes your tenant ID. 
$jsonOAuthCC.UpdateString("token_endpoint","https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token")

# Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
$http.AuthToken = $jsonOAuthCC.Emit()

# Get information about all SharePoint sites.
$sbJson = New-Object Chilkat.StringBuilder
$success = $http.QuickGetSb("https://graph.microsoft.com/v1.0/sites/getAllSites",$sbJson)
if ($success -eq $false) {
    $($http.LastErrorText)
    exit
}

$statusCode = $http.LastStatus

$("Response status code = " + $statusCode)

if ($statusCode -ne 200) {
    $($sbJson.GetAsString())
    $("Failed.")
    exit
}

$jsonResp = New-Object Chilkat.JsonObject
$jsonResp.LoadSb($sbJson)
$jsonResp.EmitCompact = $false

$($jsonResp.Emit())
$("Success.")

# Use this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON