To authenticate with a Service Principal, you will need to create an Application object within Azure Active Directory, which you will use as a means of authentication, either using a Client Secret or a Client Certificate (which is documented in this guide). If you plan on deploying IaC to the Azure Cloud using IaC Tools such as ARM, Ansible, or Terraform, you may want to consider using Certificate Based Authentication for your Service Principals as an alternative to standard Password Authentication. MSI is simpler and safer. This is where service principals and OAuth’s client credentials grant type comes into play. Using Service Principal we can control which resources can be accessed. The certificate can even be generated by Key Vault and renewed periodically based on the policy it was created with. Copy the “Display Name” of your application which will be used in step 3) (e.g.”debugapp” as a “Display Name” for the app above) c. Azure AD tenant ID. That’s where Azure Key Vault comes in, … We are going to perform below steps: Register web application which will create service principal for the application; Add certificate which can be used for app authentication; Add access policy in key vault, which will allow access to newly created service principal; Modify . Applications use Azure services should always have restricted permissions. # ##### Step 1: Create certificate for Azure AD Service Principal # ##### # Define certificate start and end dates $currentDate = Get-Date $endDate = $currentDate.AddYears (1) $notAfter = $endDate.AddYears (1) # Generate new self-signed certificate from "Run as Administrator" PowerShell session $certName = Read-Host-Prompt " Enter FQDN Subject Name for certificate " While you can authenticate a Service Principal using a password (client secret), it might be better to use an X509 certificate as an alternative. Remember this: the safest secret is the secret you never see. We never see the certificate. The same script can be used to create a regular Azure AD user a group in SQL Database. Service Principals can be created to use a certificate versus a password. 22 May 2019. You still need to find a way to keep the certificate secure, though. This can be done using the Azure Portal. Application ID of the Service Principal (SP) clientId = ""; // Application ID of the SP. Would be a great addition to Terraform to be able to authenticate a Service Principal using the … Authenticating to Azure Functions using a service principal (part 1) There are situations where we need to secure a function app and also need to allow other services to call it. It is often useful to create Azure Active Directory Service Principal objects for authenticating applications and automating tasks in Azure. AppId # Give the Service Principal Reader access to the current tenant (Get-AzureADDirectoryRole) - the GUID will be different in your tenant. If you plan on deploying IaC to the Azure Cloud using IaC Tools such as ARM, Ansible, or Terraform, you may want to consider using Certificate Based Authentication for your Service Principals as an alternative to standard Password Authentication. I have created a service principal, and put had the key vault create the certificate. Azure offers Service principals allow applications to login with restricted permission Instead of having full privilege in a non-interactive way. a. Alternatively, you can use the code sample in the blog, Azure AD Service Principal authentication to SQL DB - Code Sample. string clientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";) b. Modify the script to execute a DDL statement CREATE USER [myapp] FROM EXTERNAL PROVIDER. When it comes to using Service Principal in Azure, I always advise using Managed System Identity (MSI). # Create the Service Principal and connect it to the Application $sp = New-AzureADServicePrincipal-AppId $application. 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