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@ehrnst
Created April 9, 2018 11:51
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Create Azure Active Directory application with powershell and set reader permission on subscription
<#
.SYNOPSIS
Creates an azure ad application and sets reader permissions on subscription
.NOTES
Script is provided as an example, it has no error handeling and is not production ready. App name and permissions is hard coded.
#>
param(
[Parameter(Mandatory)]
[String]
$TenantId,
[Parameter(Mandatory)]
[String]
$SubscriptionId,
[Parameter(Mandatory)]
[System.Management.Automation.PSCredential]$cred
)
$ErrorActionPreference = "Continue" # Added cuse of the while loop
# connecting to Azure Ad
Import-Module AzureRM
Import-Module AzureAD
$AADConnection = Connect-AzureAD -Credential $cred -TenantId $TenantId
#region App Permissions
# Building resource access objects
# Used get-azureadServicePrincipal -All $true to find the correct api's
## Azure Management API
$AzureMgmtPrincipal = Get-AzureADServicePrincipal -All $true | Where-Object {$_.DisplayName -eq "Windows Azure Service Management API"}
$AzureMgmtAccess = New-Object -TypeName "Microsoft.Open.AzureAD.Model.RequiredResourceAccess"
$AzureMgmtAccess.ResourceAppId = $AzureMgmtPrincipal.AppId
# Permissions
# Explored permissions with 365mgmtPrincipal.AppRoles and .Oauth2Permissions
## Delegated Permissions
# Azure Mgmt
$AzureSvcMgmt = New-Object -TypeName "microsoft.open.azuread.model.resourceAccess" -ArgumentList "41094075-9dad-400e-a0bd-54e686782033", "Scope"
# Add permission objects to the resource access object
$AzureMgmtAccess.ResourceAccess = $AzureSvcMgmt
#endregion
# Create the new apps
$AdatumDemoApp = New-AzureADApplication -DisplayName "Adatum Demo App" -IdentifierUris "https://localhost/AdatumDemoApp" -HomePage "https://localhost/Adatum" -ReplyUrls "https://localhost/Adatum" -RequiredResourceAccess @($AzureMgmtAccess)
# Create and set access key
$AdatumDemoAppKeySecret = New-AzureADApplicationPasswordCredential -ObjectId $AdatumDemoApp.ObjectId -CustomKeyIdentifier "Access Key" -EndDate (get-date).AddYears(1)
# Add service principal to our app. Note the tag: https://docs.microsoft.com/en-us/powershell/module/azuread/new-azureadserviceprincipal?view=azureadps-2.0
$AdatumDemoAppAppSPN = New-AzureADServicePrincipal -AppId $AdatumDemoApp.AppId -Tags @("WindowsAzureActiveDirectoryIntegratedApp")
# Splunk needs to read the Azure activity logs. Adding Subscription Read access to the application
# https://docs.microsoft.com/en-us/azure/active-directory/role-based-access-control-manage-access-powershell
$AzureRMConnection = Add-AzureRmAccount -TenantId ($AADConnection.TenantId.Guid).ToString() -Credential $cred
# Create a loop to allow azure to create the SPN before setting role
while ($addRole.DisplayName -ne $AdatumDemoApp.DisplayName ) {
Write-Verbose "Waiting for SPN to create"
Start-Sleep -Seconds 5
$addRole = New-AzureRmRoleAssignment -ObjectId $AdatumDemoAppAppSPN.ObjectId -RoleDefinitionName "Reader" -Scope "/subscriptions/$SubScriptionId"
}
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