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Encrypt Azure VM Disks with PowerShell
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<# | |
.SYNOPSIS | |
Enables disk encrption on a VM | |
.DESCRIPTION | |
Enables disk encryption on a VM. The script will create a new Key Vault, Azure Active Directory Application and Service principal | |
.PARAMETER ResourceGroupName | |
The name of the resource group that contains the key vault and virtual machine | |
.PARAMETER Location | |
The location of the resources | |
.PARAMETER VMName | |
The name of the virtual machine | |
.PARAMETER KeyVaultName | |
The name of the key vault. A new key vault will be created if it doesn't exist | |
.PARAMETER AADClientSecret | |
The client secret used by the Azure AD Application | |
.EXAMPLE | |
$AAdClientSecret = "S3cr3t123!" | ConvertTo-SecureString -AsPlainText -Force | |
.\ConfigureVMDiskEncryption.ps1 -ResourceGroupName "ResourceGroup01" -Location "UK South" -VMName "VM01" -KeyVaultName "KeyVault01" -AAdClientSecret $AAdClientSecret -Verbose | |
#> | |
[CmdletBinding()] | |
Param( | |
[Parameter()] | |
[ValidateNotNullOrEmpty()] | |
[String]$ResourceGroupName, | |
[Parameter()] | |
[ValidateNotNullOrEmpty()] | |
[String]$Location, | |
[Parameter()] | |
[ValidateNotNullOrEmpty()] | |
[String]$VMName, | |
[Parameter()] | |
[ValidateNotNullOrEmpty()] | |
[String]$KeyVaultName, | |
[Parameter()] | |
[ValidateNotNullOrEmpty()] | |
[SecureString]$AAdClientSecret | |
) | |
# -- Retrieve or create a new Key Vault that is enabled for disk encryption | |
$KeyVault = Get-AzureRmKeyVault -ResourceGroupName $ResourceGroupName -VaultName $KeyVault -Verbose:$VerbosePreference -ErrorAction SilentlyContinue | |
if (!$KeyVault) { | |
Write-Verbose -Message "Key Vault $($KeyVaultName) does not exist. Creating.." | |
$KeyVault = New-AzureRmKeyVault -VaultName $KeyVaultName -ResourceGroupName $ResourceGroupName -Location $Location -Verbose:$VerbosePreference | |
} | |
Set-AzureRmKeyVaultAccessPolicy -ResourceGroupName $ResourceGroupName -VaultName $KeyVaultName -EnabledForDiskEncryption -Verbose:$VerbosePreference | |
# --- Create an AzureADApplication and a new service principal | |
$AAdApplicationParameters = @{ | |
DisplayName = $KeyVaultName | |
HomePage = $KeyVault.VaultUri | |
IdentifierUris = $KeyVault.VaultUri | |
Password = $AAdClientSecret | |
} | |
$AadApplication = New-AzureRmADApplication @AadApplicationParameters -Verbose:$VerbosePreference | |
$ServicePrincipal = New-AzureRmADServicePrincipal –ApplicationId $AadApplication.ApplicationId -Verbose:$VerbosePreference | |
# --- Allow the application access to the Key Vault | |
$KeyVaultAccessPolicyParameters = @{ | |
ResourceGroupName = $ResourceGroupName | |
VaultName = $keyVaultName | |
ServicePrincipalName = $AadApplication.ApplicationId | |
PermissionsToKeys = "WrapKey" | |
PermissionsToSecrets = "Set" | |
} | |
Set-AzureRmKeyVaultAccessPolicy @KeyVaultAccessPolicyParameters -Verbose:$VerbosePreference | |
# --- Encrypt the disks | |
$DiskEncryptionExtensionParameters = @{ | |
ResourceGroupName = $ResourceGroupName | |
VMName = $VMName | |
AadClientID = $AadApplication.ApplicationId | |
AadClientSecret = $AadClientSecret | |
DiskEncryptionKeyVaultUrl = $KeyVault.VaultUri | |
DiskEncryptionKeyVaultId = $KeyVault.ResourceId | |
} | |
Set-AzureRmVMDiskEncryptionExtension @DiskEncryptionExtensionParameters -Verbose:$VerbosePreference |
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