Automating with PowerShell: Secure App Model Refresh tokens

Kelvin Tegelaar | 09 Mar, 2021 | 2 Mins Read

So this is a quick one because I’ve had a talk today and noticed I never gave a fully automated way to get refresh tokens, endlessly. 🙂

When using the Secure Application Model, you only really need to go through the procedures once, after that you can get a new refresh token infinitely, without interaction.

To do that, you’ll have to use something like a keyvault, or another storage location where you store the original refresh key, we then update that key each time the script runs. You can use an Azure Function for this or just a script schedule.

Use the code below as an example to get a new refresh token, without human interaction.

######### Secrets #########
$ApplicationId = 'ApplicationID'
$ApplicationSecret = 'ApplicationSecret' | ConvertTo-SecureString -Force -AsPlainText
$TenantID = 'TenantID'
$RefreshToken = 'LongRefreshToken'
$ExchangeRefreshToken = 'LongExchangeRefreshToken'
$UPN = "YourPrettyUpnUsedToGenerateTokens"
######### Secrets #########
$credential = New-Object System.Management.Automation.PSCredential($ApplicationId, $ApplicationSecret)

$aadGraphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.windows.net/.default' -ServicePrincipal -Tenant $tenantID
$graphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.microsoft.com/.default' -ServicePrincipal -Tenant $tenantID

$NewAADRefreshToken = $aadGraphToken.RefreshToken
$NewGraphToken = $graphToken.RefreshToken

You can use the $NewAADRefreshtoken and $NewGraphToken to push the latest version of the refresh token somewhere safe, and also pull from it in other scrips. And that’s it! as always, Happy PowerShelling.

CyberDrain CTF returns! (and so do I!)

It’s been since september that I actually picked up a digital pen equivalent and wrote anything down. This was due to me being busy with life but also my side projects like CIPP. I’m trying to get back into the game of scripting and blogging about these scripts. There’s still so much to automate and so little time, right? ;)

Intro

This is a monitoring script requested via Reddit, One of the reddit r/msp users wondered how they can monitor Acronis a little bit easier. I jumped on this because it happened pretty much at the same time that I was asked to speak at the Acronis CyberSummit so it kinda made sense to script this so I have something to demonstrate at my session there.

Intro

Wow! It’s been a while since I’ve blogged. I’ve just been so swamped with CIPP that I’ve just let the blogging go entirely. It’s a shame because I think out of all my hobbies it’s one I enjoy the most. It’s always nice helping others achieve their scripting target. I even got a couple of LinkedIn questions asking if I was done with blogging but I’m not. Writing always gives me some more piece of mind so I’ll try to catch up again. I know I’ve said that before but this time I’ll follow through. I’m sitting down right now and scheduling the release of 5 blogs in one go. No more whining and no more waiting.