[entraid] add setup script for offline clusters.

api/utils/entraid/federation_metadata.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2024 Gravitational, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package entraid
+
+import (
+	"net/url"
+	"path"
+)
+
+// FederationMetadataURL returns the URL for the federation metadata endpoint
+func FederationMetadataURL(tenantID, appID string) string {
+	return (&url.URL{
+		Scheme: "https",
+		Host:   "login.microsoftonline.com",
+		Path:   path.Join(tenantID, "federationmetadata", "2007-06", "federationmetadata.xml"),
+		RawQuery: url.Values{
+			"appid": {appID},
+		}.Encode(),
+	}).String()
+}

lib/config/configuration.go

@@ -297,6 +297,9 @@ type IntegrationConfAzureOIDC struct {
 	// When this is true, the integration script will produce
 	// a cache file necessary for TAG synchronization.
 	AccessGraphEnabled bool
+
+	// SkipOIDCConfiguration is a flag indicating that OIDC configuration should be skipped.
+	SkipOIDCConfiguration bool
 }
 
 // IntegrationConfDeployServiceIAM contains the arguments of

lib/integrations/azureoidc/enterprise_app.go

@@ -52,7 +52,7 @@ var appRoles = []string{
 //   - Provides Teleport with OIDC authentication to Azure
 //   - Is given the permissions to access certain Microsoft Graph API endpoints for this tenant.
 //   - Provides SSO to the Teleport cluster via SAML.
-func SetupEnterpriseApp(ctx context.Context, proxyPublicAddr string, authConnectorName string) (string, string, error) {
+func SetupEnterpriseApp(ctx context.Context, proxyPublicAddr string, authConnectorName string, skipOIDCSetup bool) (string, string, error) {
 	var appID, tenantID string
 
 	tenantID, err := getTenantID()
@@ -120,8 +120,12 @@ func SetupEnterpriseApp(ctx context.Context, proxyPublicAddr string, authConnect
 		}
 	}
 
-	if err := createFederatedAuthCredential(ctx, graphClient, *app.ID, proxyPublicAddr); err != nil {
-		return appID, tenantID, trace.Wrap(err, "failed to create an OIDC federated auth credential")
+	// Skip OIDC setup if requested.
+	// This is useful for clusters that can't use OIDC because they are not reachable from the public internet.
+	if !skipOIDCSetup {
+		if err := createFederatedAuthCredential(ctx, graphClient, *app.ID, proxyPublicAddr); err != nil {
+			return appID, tenantID, trace.Wrap(err, "failed to create an OIDC federated auth credential")
+		}
 	}
 
 	acsURL, err := url.Parse(proxyPublicAddr)