How to upload Private Key Certificates (.pfx), Public Key Certificates (.cer) to Azure WebApp

Question

How to upload a private, public certificate to the Azure AppService using Azure Powershell. I am aware of New-AzureRmWebAppSSLBinding but I am not doing any SSL binding.

We have Azure App Services that use SSL binding. I used New-AzureRmWebAppSSLBinding to upload a certificate for this purpose. I did upload a cert for each host on my web app. This works fine. But I wanted to upload additional private and public certs on to this app service for API validation. I did not find any azure powershell command to upload a private or public certificate.

Azure portal allows uploading a private certificate along with its password or a public certificate. However I want to do the same using powershell. The portal UI also has an option to import certificate from key vault. I sure can upload a certificate to key vault but there is no powershell command to import it on to Azure app service.

<a href="https://ibb.co/Kh7t5DL"><img src="https://i.ibb.co/fFt3X9n/Capture-Cert.jpg" alt="Capture-Cert" border="0"></a>

I have gone through these articles but they both use the same command. https://github.com/Azure/azure-powershell/issues/2108 How to add a certificate to an Azure RM website with Powershell

New-AzureRmWebAppSSLBinding -ResourceGroupName $RGName -WebAppName $webAppName -CertificateFilePath $filePath -CertificatePassword $pass

If I call this method it asks for the host name. Since I already uploaded a certificate with SSL binding for this hostname I cannot use it. Without supplying a hostname this command will fail.

Raja Chava Raja Chava · Accepted Answer · 2019-09-26T14:39:43

Ok, finally I was able to figure it out and upload both private and public certs. Azure resource explorer was really helpful to understand the folder structure and certificate location.

To upload Public certificate: These are attached per app service.

$webApps = @{
            "Dev_AppServicesGroup" = "DevUserService"
        }
$certName = "chain-cert.cer"
$Path = "C:\Certs"    

$fullpath = $path + '\' + $certname
$pwd = ConvertTo-SecureString -String 'anyPwd' -AsPlainText -Force
$cert  = New-AzureRmApplicationGatewaySslCertificate -Name 'someCert' -CertificateFile $fullpath -Password $pwd
$apiVersion = '2018-02-01'

if($cert)
{
    $PropertiesObject = @{
        blob=$cert.Data; 
        publicCertificateLocation= "CurrentUserMy"
    }

    foreach($resourceGroup in $webApps.Keys)
    {
       $webAppName = $webApps.Item($resourceGroup)        
       $resource = Get-AzureRmWebApp -ResourceGroupName $resourceGroup -Name $webAppName
       $resourceName = $resource.Name + "/"+$certName
       New-AzureRmResource -Location $resource.Location -PropertyObject $PropertiesObject -ResourceGroupName $resource.ResourceGroup -ResourceType Microsoft.Web/sites/publicCertificates -ResourceName $resourceName -ApiVersion $apiVersion -Force        

       #Apply the cert to the deployment slots if any
       $slots = Get-AzureRmResource -ResourceGroupName $resource.ResourceGroup -ResourceType Microsoft.Web/sites/slots -ResourceName $webAppName -ApiVersion $apiVersion
       foreach($slot in $slots)
       {            
          $resourceName = $slot.Name + "/"+$certName                     
          New-AzureRmResource -Location $slot.Location -PropertyObject $PropertiesObject -ResourceGroupName $slot.ResourceGroupName -ResourceType Microsoft.Web/sites/slots/publicCertificates -ResourceName $resourceName -ApiVersion $apiVersion -Force            
       }
    }
}

To upload Private certificate: These are uploaded per resource group and are available to all app services under that group.

#Private certs needs to be uploaded to each resource group with app services
$resourceGroups = @("Dev_AppServicesGroup1", "Dev_AppServicesGroup2")
$certName = "event-store-user.p12"

$certPwd = "Your certificate password" #This is the private cert password
$Path = "C:\Certs"   

$fullpath = $path + '\' + $certname    

$pwd = ConvertTo-SecureString -String 'SomePwd' -AsPlainText -Force
$cert  = New-AzureRmApplicationGatewaySslCertificate -Name someCert -CertificateFile $fullpath -Password $pwd
$apiVersion = '2018-02-01'

if($cert)
{
    $PropertiesObject = @{
        pfxBlob=$cert.Data;  
        password =$certPwd; #This is the private cert password        
        ResourceType = "Microsoft.Web/Certificates"
    }

    foreach($resourceGroup in $resourceGroups)
    {
        $resource = Get-AzureRmResourceGroup -Name $resourceGroup       
        New-AzureRmResource -ResourceName $certName -Location $resource.Location -PropertyObject $PropertiesObject -ResourceGroupName $resource.ResourceGroupName -ResourceType Microsoft.Web/certificates -ApiVersion $apiVersion -Force        
    }
}

That's it. To upload SSL certificate and bind it to the app service you can use the command 'New-AzWebAppSSLBinding'.

How to upload Private Key Certificates (.pfx), Public Key Certificates (.cer) to Azure WebApp

2 Answers