emit user_origin for local login event (#52124)

* emit user_origin for local login event

* ignore unspecified origin while allowing overriding with a defined origin value

* abstract origin getter

* test: emit unspecified origin value to test the initial value is preserved

Author: flyinghermit

api/proto/teleport/legacy/types/events/events.proto

@@ -79,6 +79,24 @@ enum UserKind {
   USER_KIND_BOT = 2;
 }
 
+// UserOrigin is the origin of a user account.
+// Keep the values in sync with UserOrigin enum defined in
+// prehogv1 and prehogv1alpha.
+enum UserOrigin {
+  // Indicates a legacy cluster emitting events without a defined user origin.
+  USER_ORIGIN_UNSPECIFIED = 0;
+  // Indicates a local user.
+  USER_ORIGIN_LOCAL = 1;
+  // Indicates an SSO user originated from the SAML or OIDC connector.
+  USER_ORIGIN_SSO = 2;
+  // Indicates a user originated from the Okta integration.
+  USER_ORIGIN_OKTA = 3;
+  // Indicates a user originated from the SCIM integration.
+  USER_ORIGIN_SCIM = 4;
+  // Indicates a user originated from the EntraID integration.
+  USER_ORIGIN_ENTRAID = 5;
+}
+
 // UserMetadata is a common user event metadata
 message UserMetadata {
   // User is teleport user name
@@ -119,6 +137,9 @@ message UserMetadata {
   // BotInstanceID is the ID of the Bot Instance if this action is associated
   // with one.
   string BotInstanceID = 12 [(gogoproto.jsontag) = "bot_instance_id,omitempty"];
+
+  // UserOrigin specifies the origin of this user account.
+  UserOrigin UserOrigin = 13 [(gogoproto.jsontag) = "user_origin,omitempty"];
 }
 
 // Server is a server metadata

api/types/events/conv.go

@@ -0,0 +1,48 @@
+/*
+Copyright 2025 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 events
+
+import (
+	"github.com/gravitational/teleport/api/types"
+	"github.com/gravitational/teleport/api/types/common"
+)
+
+// UserOriginFromUserType converts API UserType to UserOrigin.
+func UserOriginFromUserType(userType types.UserType) UserOrigin {
+	switch userType {
+	case types.UserTypeSSO:
+		return UserOrigin_USER_ORIGIN_SSO
+	case types.UserTypeLocal:
+		return UserOrigin_USER_ORIGIN_LOCAL
+	default:
+		return UserOrigin_USER_ORIGIN_UNSPECIFIED
+	}
+}
+
+// UserOriginFromOriginLabel converts API origin label value to UserOrigin.
+func UserOriginFromOriginLabel(origin string) UserOrigin {
+	switch origin {
+	case common.OriginOkta:
+		return UserOrigin_USER_ORIGIN_OKTA
+	case common.OriginSCIM:
+		return UserOrigin_USER_ORIGIN_SCIM
+	case common.OriginEntraID:
+		return UserOrigin_USER_ORIGIN_ENTRAID
+	default:
+		return UserOrigin_USER_ORIGIN_UNSPECIFIED
+	}
+}