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Version: v1.0.0

Authentication

As of today we support a few authentication mechanisms.

Managed Service Identity​

You can use Managed Service Identity to delegate the authentication to Azure via ManagedServiceIdentityAuthentication.

This is the recommended approach to interact with Azure Key Vault.

var vaultAuthentication = new ManagedServiceIdentityAuthentication();
var vaultConfiguration = new KeyVaultConfiguration(keyVaultUri);
var keyVaultSecretProvider = new KeyVaultSecretProvider(vaultAuthentication, vaultConfiguration);

If you require more control over the authentication mechanism you can optionally specify an AzureServiceTokenProvider connection string &/or Azure AD instance.

var connectionString = Configuration.GetConnectionString("Arcus:MSI:ConnectionString");
var azureAdInstance = Configuration.GetValue<string>("Arcus:MSI:AzureAdInstance");
var vaultAuthentication = new ManagedServiceIdentityAuthentication(connectionString, azureAdInstance);
var vaultConfiguration = new KeyVaultConfiguration(keyVaultUri);
var keyVaultSecretProvider = new KeyVaultSecretProvider(vaultAuthentication, vaultConfiguration);

See Service-to-service authentication to Azure Key Vault using .NET - Connection String Support for supported connection strings and National clouds - Azure AD authentication endpoints for valid azure AD instances

Service Principle​

Authentication via username and password is supported with the ServicePrincipalAuthentication.

var clientId = Configuration.GetValue<string>("Arcus:ServicePrincipal:ClientId");
var clientKey = Configuration.GetValue<string>("Arcus:ServicePrincipal:AccessKey");

var vaultAuthentication = new ServicePrincipalAuthentication(clientId, clientKey);
var vaultConfiguration = new KeyVaultConfiguration(keyVaultUri);
var keyVaultSecretProvider = new KeyVaultSecretProvider(vaultAuthentication, vaultConfiguration);

Certificate​

Authentication via client ID and certificate is supported with the CertificateBasedAuthentication.

var clientId = Configuration.GetValue<string>("Arcus:ServicePrincipal:ClientId");
X509Certificate2 certificate = ...

var vaultAuthentication = new CertificateBasedAuthentication(clientId, certificate);
var vaultConfiguration = new KeyVaultConfiguration(keyVaultUri);
var keyVaultSecretProvider = new KeyVaultSecretProvider(vaultAuthentication, vaultConfiguration);