Add test for HTTP and Transport TLS on basic license

This adds a new security/qa test for TLS on a basic license.

It starts a 2 node cluster with a basic license, and TLS enabled
on both HTTP and Transport, and verifies the license type, x-pack
SSL usage and SSL certificates API.

It also upgrades the cluster to a trial license and performs that
same set of checks (to ensure that clusters with basic license
and TLS enabled can be upgraded to a higher feature license)

Backport of: elastic#40714

x-pack/plugin/security/build.gradle

@@ -305,3 +305,13 @@ unitTest {
 // installing them as individual plugins for integ tests doesn't make sense,
 // so we disable integ tests
 integTest.enabled = false
+
+// add all sub-projects of the qa sub-project
+gradle.projectsEvaluated {
+    project.subprojects
+            .find { it.path == project.path + ":qa" }
+            .subprojects
+            .findAll { it.path.startsWith(project.path + ":qa") }
+            .each { check.dependsOn it.check }
+}
+

x-pack/plugin/security/qa/build.gradle

@@ -0,0 +1,18 @@
+import org.elasticsearch.gradle.test.RestIntegTestTask
+
+apply plugin: 'elasticsearch.build'
+unitTest.enabled = false
+
+dependencies {
+    compile project(':test:framework')
+}
+
+subprojects {
+    project.tasks.withType(RestIntegTestTask) {
+        final File xPackResources = new File(xpackProject('plugin').projectDir, 'src/test/resources')
+        project.copyRestSpec.from(xPackResources) {
+            include 'rest-api-spec/api/**'
+        }
+    }
+}
+

x-pack/plugin/security/qa/tls-basic/build.gradle

@@ -0,0 +1,48 @@
+import org.elasticsearch.gradle.http.WaitForHttpResource
+
+apply plugin: 'elasticsearch.standalone-rest-test'
+apply plugin: 'elasticsearch.rest-test'
+
+dependencies {
+  // "org.elasticsearch.plugin:x-pack-core:${version}" doesn't work with idea because the testArtifacts are also here
+  testCompile project(path: xpackModule('core'), configuration: 'default')
+  testCompile project(path: xpackModule('security'), configuration: 'testArtifacts')
+  testCompile project(path: xpackModule('core'), configuration: 'testArtifacts')
+}
+
+forbiddenPatterns {
+    exclude '**/*.key'
+    exclude '**/*.p12'
+}
+
+File caFile = project.file('src/test/resources/ssl/ca.crt')
+
+integTestCluster {
+  numNodes=2
+
+  extraConfigFile 'http.key', project.projectDir.toPath().resolve('src/test/resources/ssl/http.key')
+  extraConfigFile 'http.crt', project.projectDir.toPath().resolve('src/test/resources/ssl/http.crt')
+  extraConfigFile 'transport.key', project.projectDir.toPath().resolve('src/test/resources/ssl/transport.key')
+  extraConfigFile 'transport.crt', project.projectDir.toPath().resolve('src/test/resources/ssl/transport.crt')
+  extraConfigFile 'ca.crt', caFile
+
+  setting 'xpack.ilm.enabled', 'false'
+  setting 'xpack.ml.enabled', 'false'
+  setting 'xpack.license.self_generated.type', 'basic'
+  setting 'xpack.security.http.ssl.enabled', 'true'
+  setting 'xpack.security.http.ssl.certificate', 'http.crt'
+  setting 'xpack.security.http.ssl.key', 'http.key'
+  setting 'xpack.security.http.ssl.key_passphrase', 'http-password'
+  setting 'xpack.security.transport.ssl.enabled', 'true'
+  setting 'xpack.security.transport.ssl.certificate', 'transport.crt'
+  setting 'xpack.security.transport.ssl.key', 'transport.key'
+  setting 'xpack.security.transport.ssl.key_passphrase', 'transport-password'
+  setting 'xpack.security.transport.ssl.certificate_authorities', 'ca.crt'
+
+  waitCondition = { node, ant ->
+    WaitForHttpResource http = new WaitForHttpResource("https", node.httpUri(), numNodes)
+    http.setCertificateAuthorities(caFile)
+    return http.wait(5000)
+  }
+}
+

x-pack/plugin/security/qa/tls-basic/src/test/java/org/elasticsearch/xpack/security/TlsWithBasicLicenseIT.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+package org.elasticsearch.xpack.security;
+
+import org.elasticsearch.client.Request;
+import org.elasticsearch.client.Response;
+import org.elasticsearch.common.io.PathUtils;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.test.rest.ESRestTestCase;
+import org.elasticsearch.test.rest.yaml.ObjectPath;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.net.URL;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.instanceOf;
+import static org.hamcrest.Matchers.iterableWithSize;
+import static org.hamcrest.Matchers.notNullValue;
+
+public class TlsWithBasicLicenseIT extends ESRestTestCase {
+    private static Path httpTrustStore;
+
+    @BeforeClass
+    public static void findTrustStore() throws Exception {
+        final URL resource = TlsWithBasicLicenseIT.class.getResource("/ssl/ca.p12");
+        if (resource == null) {
+            throw new FileNotFoundException("Cannot find classpath resource /ssl/ca.p12");
+        }
+        httpTrustStore = PathUtils.get(resource.toURI());
+    }
+
+    @AfterClass
+    public static void cleanupStatics() {
+        httpTrustStore = null;
+    }
+
+    @Override
+    protected String getProtocol() {
+        return "https";
+    }
+
+    @Override
+    protected Settings restClientSettings() {
+        return Settings.builder()
+            .put(TRUSTSTORE_PATH, httpTrustStore)
+            .put(TRUSTSTORE_PASSWORD, "password")
+            .build();
+    }
+
+    public void testWithBasicLicense() throws Exception {
+        checkLicenseType("basic");
+        checkSSLEnabled();
+        checkCertificateAPI();
+    }
+
+    public void testWithTrialLicense() throws Exception {
+        startTrial();
+        try {
+            checkLicenseType("trial");
+            checkSSLEnabled();
+            checkCertificateAPI();
+        } finally {
+            revertTrial();
+        }
+    }
+
+    private void startTrial() throws IOException {
+        Response response = client().performRequest(new Request("POST", "/_license/start_trial?acknowledge=true"));
+        assertOK(response);
+    }
+
+    private void revertTrial() throws IOException {
+        client().performRequest(new Request("POST", "/_license/start_basic?acknowledge=true"));
+    }
+
+    private void checkLicenseType(String type) throws IOException {
+        Map<String, Object> license = getAsMap("/_license");
+        assertThat(license, notNullValue());
+        assertThat(ObjectPath.evaluate(license, "license.type"), equalTo(type));
+    }
+
+    private void checkSSLEnabled() throws IOException {
+        Map<String, Object> usage = getAsMap("/_xpack/usage");
+        assertThat(usage, notNullValue());
+        assertThat(ObjectPath.evaluate(usage, "security.ssl.http.enabled"), equalTo(true));
+        assertThat(ObjectPath.evaluate(usage, "security.ssl.transport.enabled"), equalTo(true));
+    }
+
+    private void checkCertificateAPI() throws IOException {
+        Response response = client().performRequest(new Request("GET", "/_ssl/certificates"));
+        ObjectPath path = ObjectPath.createFromResponse(response);
+        final Object body = path.evaluate("");
+        assertThat(body, instanceOf(List.class));
+        final List<?> certs = (List<?>) body;
+        assertThat(certs, iterableWithSize(3));
+        final List<Map<String, Object>> certInfo = new ArrayList<>();
+        for (int i = 0; i < certs.size(); i++) {
+            final Object element = certs.get(i);
+            assertThat(element, instanceOf(Map.class));
+            final Map<String, Object> map = (Map<String, Object>) element;
+            certInfo.add(map);
+            assertThat(map.get("format"), equalTo("PEM"));
+        }
+        List<String> paths = certInfo.stream().map(m -> String.valueOf(m.get("path"))).collect(Collectors.toList());
+        assertThat(paths, containsInAnyOrder("http.crt", "transport.crt", "ca.crt"));
+    }
+
+
+}
+

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/README.asciidoc

@@ -0,0 +1,48 @@
+= Keystore Details
+This document details the steps used to create the certificate and keystore files in this directory.
+
+== Instructions on generating certificates
+The certificates in this directory have been generated using elasticsearch-certutil (7.0.0 SNAPSHOT)
+
+[source,shell]
+-----------------------------------------------------------------------------------------------------------
+elasticsearch-certutil ca --pem --out=ca.zip --pass="ca-password" --days=3500
+unzip ca.zip
+mv ca/ca.* ./
+
+rm ca.zip
+rmdir ca
+-----------------------------------------------------------------------------------------------------------
+
+[source,shell]
+-----------------------------------------------------------------------------------------------------------
+elasticsearch-certutil cert --pem --name=http --out=http.zip --pass="http-password" --days=3500 \
+    --ca-cert=ca.crt --ca-key=ca.key --ca-pass="ca-password" \
+    --dns=localhost --dns=localhost.localdomain --dns=localhost4 --dns=localhost4.localdomain4 --dns=localhost6 --dns=localhost6.localdomain6 \
+    --ip=127.0.0.1 --ip=0:0:0:0:0:0:0:1
+
+unzip http.zip
+mv http/http.* ./
+
+rm http.zip
+rmdir http
+-----------------------------------------------------------------------------------------------------------
+
+[source,shell]
+-----------------------------------------------------------------------------------------------------------
+elasticsearch-certutil cert --pem --name=transport --out=transport.zip --pass="transport-password" --days=3500 \
+    --ca-cert=ca.crt --ca-key=ca.key --ca-pass="ca-password" \
+    --dns=localhost --dns=localhost.localdomain --dns=localhost4 --dns=localhost4.localdomain4 --dns=localhost6 --dns=localhost6.localdomain6 \
+    --ip=127.0.0.1 --ip=0:0:0:0:0:0:0:1
+
+unzip transport.zip
+mv transport/transport.* ./
+
+rm transport.zip
+rmdir transport
+-----------------------------------------------------------------------------------------------------------
+
+[source,shell]
+-----------------------------------------------------------------------------------------------------------
+keytool -importcert -file ca.crt -keystore ca.p12 -storetype PKCS12 -storepass "password" -alias ca
+-----------------------------------------------------------------------------------------------------------

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/ca.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDSTCCAjGgAwIBAgIUNsCMQBpQB3zJAC1iERdc7yADVw0wDQYJKoZIhvcNAQEL
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+ZnaOfIkCQx49gLARjzzGp/OC/UfKVCWzpLHn7dY=
+-----END CERTIFICATE-----

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/ca.key

@@ -0,0 +1,30 @@
+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,67376A5606FB27E9
+
+v4OAjurrB7Tc2mVswSeaaYAiFomvSQmre8DlC5VNvavzT6Hlx5hIyEVIttcNeTeD
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+-----END RSA PRIVATE KEY-----

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/http.crt

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDszCCApugAwIBAgIVAJX8GTm+AWIicokE5npzZ2B3qad3MA0GCSqGSIb3DQEB
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+-----END CERTIFICATE-----

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/http.key

@@ -0,0 +1,30 @@
+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,A46C453D20DC86A7
+
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+-----END RSA PRIVATE KEY-----

x-pack/plugin/security/qa/tls-basic/src/test/resources/ssl/transport.crt

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
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