[Backport 2.x] Add password message to /dashboardsinfo endpoint

src/integrationTest/java/org/opensearch/security/api/DashboardsInfoTest.java

@@ -0,0 +1,56 @@
+/*
+* SPDX-License-Identifier: Apache-2.0
+*
+* The OpenSearch Contributors require contributions made to
+* this file be licensed under the Apache-2.0 license or a
+* compatible open source license.
+*
+* Modifications Copyright OpenSearch Contributors. See
+* GitHub history for details.
+*/
+
+package org.opensearch.security.api;
+
+import com.carrotsearch.randomizedtesting.annotations.ThreadLeakScope;
+import org.apache.hc.core5.http.HttpStatus;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.opensearch.test.framework.TestSecurityConfig;
+import org.opensearch.test.framework.TestSecurityConfig.Role;
+import org.opensearch.test.framework.cluster.ClusterManager;
+import org.opensearch.test.framework.cluster.LocalCluster;
+import org.opensearch.test.framework.cluster.TestRestClient;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
+import static org.opensearch.security.rest.DashboardsInfoAction.DEFAULT_PASSWORD_MESSAGE;
+import static org.opensearch.test.framework.TestSecurityConfig.AuthcDomain.AUTHC_HTTPBASIC_INTERNAL;
+
+@RunWith(com.carrotsearch.randomizedtesting.RandomizedRunner.class)
+@ThreadLeakScope(ThreadLeakScope.Scope.NONE)
+public class DashboardsInfoTest {
+
+    protected final static TestSecurityConfig.User DASHBOARDS_USER = new TestSecurityConfig.User("dashboards_user").roles(
+        new Role("dashboards_role").indexPermissions("read").on("*").clusterPermissions("cluster_composite_ops")
+    );
+
+    @ClassRule
+    public static LocalCluster cluster = new LocalCluster.Builder().clusterManager(ClusterManager.THREE_CLUSTER_MANAGERS)
+        .authc(AUTHC_HTTPBASIC_INTERNAL)
+        .users(DASHBOARDS_USER)
+        .build();
+
+    @Test
+    public void testDashboardsInfoValidationMessage() throws Exception {
+
+        try (TestRestClient client = cluster.getRestClient(DASHBOARDS_USER)) {
+            TestRestClient.HttpResponse response = client.get("_plugins/_security/dashboardsinfo");
+            assertThat(response.getStatusCode(), equalTo(HttpStatus.SC_OK));
+            assertThat(response.getBody(), containsString("password_validation_error_message"));
+            assertThat(response.getBody(), containsString(DEFAULT_PASSWORD_MESSAGE));
+        }
+    }
+}

src/integrationTest/java/org/opensearch/security/api/DashboardsInfoWithSettingsTest.java

@@ -0,0 +1,68 @@
+/*
+* SPDX-License-Identifier: Apache-2.0
+*
+* The OpenSearch Contributors require contributions made to
+* this file be licensed under the Apache-2.0 license or a
+* compatible open source license.
+*
+* Modifications Copyright OpenSearch Contributors. See
+* GitHub history for details.
+*/
+
+package org.opensearch.security.api;
+
+import com.carrotsearch.randomizedtesting.annotations.ThreadLeakScope;
+import org.apache.hc.core5.http.HttpStatus;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.opensearch.security.support.ConfigConstants;
+import org.opensearch.test.framework.TestSecurityConfig;
+import org.opensearch.test.framework.TestSecurityConfig.Role;
+import org.opensearch.test.framework.cluster.ClusterManager;
+import org.opensearch.test.framework.cluster.LocalCluster;
+import org.opensearch.test.framework.cluster.TestRestClient;
+
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
+import static org.opensearch.test.framework.TestSecurityConfig.AuthcDomain.AUTHC_HTTPBASIC_INTERNAL;
+
+@RunWith(com.carrotsearch.randomizedtesting.RandomizedRunner.class)
+@ThreadLeakScope(ThreadLeakScope.Scope.NONE)
+public class DashboardsInfoWithSettingsTest {
+
+    protected final static TestSecurityConfig.User DASHBOARDS_USER = new TestSecurityConfig.User("dashboards_user").roles(
+        new Role("dashboards_role").indexPermissions("read").on("*").clusterPermissions("cluster_composite_ops")
+    );
+
+    private static final String CUSTOM_PASSWORD_MESSAGE =
+        "Password must be minimum 5 characters long and must contain at least one uppercase letter, one lowercase letter, one digit, and one special character.";
+
+    @ClassRule
+    public static LocalCluster cluster = new LocalCluster.Builder().clusterManager(ClusterManager.THREE_CLUSTER_MANAGERS)
+        .authc(AUTHC_HTTPBASIC_INTERNAL)
+        .users(DASHBOARDS_USER)
+        .nodeSettings(
+            Map.of(
+                ConfigConstants.SECURITY_RESTAPI_PASSWORD_VALIDATION_REGEX,
+                "(?=.*[A-Z])(?=.*[^a-zA-Z\\d])(?=.*[0-9])(?=.*[a-z]).{5,}",
+                ConfigConstants.SECURITY_RESTAPI_PASSWORD_VALIDATION_ERROR_MESSAGE,
+                CUSTOM_PASSWORD_MESSAGE
+            )
+        )
+        .build();
+
+    @Test
+    public void testDashboardsInfoValidationMessageWithCustomMessage() throws Exception {
+
+        try (TestRestClient client = cluster.getRestClient(DASHBOARDS_USER)) {
+            TestRestClient.HttpResponse response = client.get("_plugins/_security/dashboardsinfo");
+            assertThat(response.getStatusCode(), equalTo(HttpStatus.SC_OK));
+            assertThat(response.getBody(), containsString("password_validation_error_message"));
+            assertThat(response.getBody(), containsString(CUSTOM_PASSWORD_MESSAGE));
+        }
+    }
+}

src/main/java/org/opensearch/security/rest/DashboardsInfoAction.java

@@ -65,6 +65,9 @@ public class DashboardsInfoAction extends BaseRestHandler {
     private final PrivilegesEvaluator evaluator;
     private final ThreadContext threadContext;
 
+    public static final String DEFAULT_PASSWORD_MESSAGE = "Password should be at least 8 characters long and contain at least one "
+        + "uppercase letter, one lowercase letter, one digit, and one special character.";
+
     public DashboardsInfoAction(
         final Settings settings,
         final RestController controller,
@@ -103,6 +106,10 @@ public void accept(RestChannel channel) throws Exception {
                     builder.field("multitenancy_enabled", evaluator.multitenancyEnabled());
                     builder.field("private_tenant_enabled", evaluator.privateTenantEnabled());
                     builder.field("default_tenant", evaluator.dashboardsDefaultTenant());
+                    builder.field(
+                        "password_validation_error_message",
+                        client.settings().get(ConfigConstants.SECURITY_RESTAPI_PASSWORD_VALIDATION_ERROR_MESSAGE, DEFAULT_PASSWORD_MESSAGE)
+                    );
                     builder.endObject();
 
                     response = new BytesRestResponse(RestStatus.OK, builder);