InjectSecurity - inject User object in UserInfo in threadContext (#396) (#397)

* Added user_info injection of User object in InjectSecurity

Signed-off-by: Petar <petar.dzepina@gmail.com>
(cherry picked from commit f7639aa)

Co-authored-by: Petar Dzepina <petar.dzepina@gmail.com>

Author: opensearch-trigger-bot[bot]

src/main/java/org/opensearch/commons/InjectSecurity.java

@@ -10,12 +10,14 @@
 import static org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_USE_INJECTED_USER_FOR_PLUGINS;
 
 import java.util.List;
+import java.util.StringJoiner;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.opensearch.common.Strings;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.util.concurrent.ThreadContext;
+import org.opensearch.commons.authuser.User;
 
 /**
  * For background jobs usage only. User or Roles injection can be done using transport layer only.
@@ -91,6 +93,7 @@ public InjectSecurity(final String id, final Settings settings, final ThreadCont
 
     /**
      * Injects user or roles, based on opendistro_security_use_injected_user_for_plugins setting. By default injects roles.
+     * Expects threadContext to be stashed
      * @param user
      * @param roles
      */
@@ -104,7 +107,8 @@ public void inject(final String user, final List<String> roles) {
 
     /**
      * Injects user.
-     * @param user
+     * Expects threadContext to be stashed
+     * @param user name
      */
     public void injectUser(final String user) {
         if (Strings.isNullOrEmpty(user)) {
@@ -115,8 +119,39 @@ public void injectUser(final String user) {
             threadContext.putTransient(INJECTED_USER, user);
             log.debug("{}, InjectSecurity - inject roles: {}", Thread.currentThread().getName(), id);
         } else {
-            log.error("{}, InjectSecurity- most likely thread context corruption : {}", Thread.currentThread().getName(), id);
+            log.error("{}, InjectSecurity - most likely thread context corruption : {}", Thread.currentThread().getName(), id);
+        }
+    }
+
+    /**
+     * Injects user object into user info.
+     * Expects threadContext to be stashed.
+     * @param user
+     */
+    public void injectUserInfo(final User user) {
+        if (user == null) {
+            return;
+        }
+        String userObjectAsString = threadContext.getTransient(ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT);
+        if (userObjectAsString != null) {
+            log
+                .error(
+                    "{}, InjectSecurity - id: [{}] found existing user_info: {}",
+                    Thread.currentThread().getName(),
+                    id,
+                    userObjectAsString
+                );
+            return;
+        }
+        StringJoiner joiner = new StringJoiner("|");
+        joiner.add(user.getName());
+        joiner.add(java.lang.String.join(",", user.getBackendRoles()));
+        joiner.add(java.lang.String.join(",", user.getRoles()));
+        String requestedTenant = user.getRequestedTenant();
+        if (!Strings.isNullOrEmpty(requestedTenant)) {
+            joiner.add(requestedTenant);
         }
+        threadContext.putTransient(ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT, joiner.toString());
     }
 
     /**

src/test/java/org/opensearch/commons/InjectSecurityTest.java

@@ -12,14 +12,17 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.opensearch.commons.ConfigConstants.INJECTED_USER;
 import static org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_INJECTED_ROLES;
+import static org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT;
 import static org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_USE_INJECTED_USER_FOR_PLUGINS;
 
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 
 import org.junit.jupiter.api.Test;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.util.concurrent.ThreadContext;
+import org.opensearch.commons.authuser.User;
 
 public class InjectSecurityTest {
 
@@ -85,6 +88,42 @@ public void testInjectUser() {
         assertNull(threadContext.getTransient(INJECTED_USER));
     }
 
+    @Test
+    public void testInjectUserInfo() {
+        Settings settings = Settings.builder().build();
+        Settings headerSettings = Settings.builder().put("request.headers.default", "1").build();
+        ThreadContext threadContext = new ThreadContext(headerSettings);
+        threadContext.putHeader("name", "opendistro");
+        threadContext.putTransient("ctx.name", "plugin");
+
+        assertEquals("1", threadContext.getHeader("default"));
+        assertEquals("opendistro", threadContext.getHeader("name"));
+        assertEquals("plugin", threadContext.getTransient("ctx.name"));
+
+        User user = new User(
+            "Bob",
+            List.of("backendRole1", "backendRole2"),
+            List.of("role1", "role2"),
+            List.of("attr1", "attr2"),
+            "tenant1"
+        );
+        try (InjectSecurity helper = new InjectSecurity("test-name", null, threadContext)) {
+            helper.injectUserInfo(user);
+            assertEquals("1", threadContext.getHeader("default"));
+            assertEquals("opendistro", threadContext.getHeader("name"));
+            assertEquals("plugin", threadContext.getTransient("ctx.name"));
+            assertNotNull(threadContext.getTransient(OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT));
+            assertEquals(
+                "Bob|backendRole1,backendRole2|role1,role2|tenant1",
+                threadContext.getTransient(OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT)
+            );
+        }
+        assertEquals("1", threadContext.getHeader("default"));
+        assertEquals("opendistro", threadContext.getHeader("name"));
+        assertEquals("plugin", threadContext.getTransient("ctx.name"));
+        assertNull(threadContext.getTransient(OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT));
+    }
+
     @Test
     public void testInjectProperty() {
         Settings settings = Settings.builder().put(OPENSEARCH_SECURITY_USE_INJECTED_USER_FOR_PLUGINS, false).build();