Test related to authentication with x.509 certificates.

Signed-off-by: Lukasz Soszynski <lukasz.soszynski@eliatra.com>

src/integrationTest/java/org/opensearch/security/http/CertificateAuthenticationTest.java

@@ -0,0 +1,145 @@
+/*
+* Copyright OpenSearch Contributors
+* 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.
+*
+*/
+package org.opensearch.security.http;
+
+import java.util.List;
+import java.util.Map;
+
+import com.carrotsearch.randomizedtesting.annotations.ThreadLeakScope;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.opensearch.test.framework.RolesMapping;
+import org.opensearch.test.framework.TestSecurityConfig.AuthcDomain;
+import org.opensearch.test.framework.TestSecurityConfig.AuthcDomain.HttpAuthenticator;
+import org.opensearch.test.framework.TestSecurityConfig.Role;
+import org.opensearch.test.framework.TestSecurityConfig.User;
+import org.opensearch.test.framework.certificate.CertificateData;
+import org.opensearch.test.framework.certificate.TestCertificates;
+import org.opensearch.test.framework.cluster.ClusterManager;
+import org.opensearch.test.framework.cluster.LocalCluster;
+import org.opensearch.test.framework.cluster.TestRestClient;
+import org.opensearch.test.framework.cluster.TestRestClient.HttpResponse;
+
+import static org.apache.hc.core5.http.HttpStatus.SC_OK;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.Matchers.hasSize;
+import static org.opensearch.test.framework.TestSecurityConfig.AuthcDomain.AUTHC_HTTPBASIC_INTERNAL;
+import static org.opensearch.test.framework.TestSecurityConfig.Role.ALL_ACCESS;
+
+@RunWith(com.carrotsearch.randomizedtesting.RandomizedRunner.class)
+@ThreadLeakScope(ThreadLeakScope.Scope.NONE)
+public class CertificateAuthenticationTest {
+
+	private static final User USER_ADMIN = new User("admin").roles(ALL_ACCESS);
+
+	public static final String POINTER_BACKEND_ROLES = "/backend_roles";
+	public static final String POINTER_ROLES = "/roles";
+
+	private static final String USER_SPOCK = "spock";
+	private static final String USER_KIRK = "kirk";
+
+	private static final String BACKEND_ROLE_BRIDGE = "bridge";
+	private static final String BACKEND_ROLE_CAPTAIN = "captain";
+
+	private static final Role ROLE_ALL_INDEX_SEARCH = new Role("all-index-search").indexPermissions("indices:data/read/search")
+		.on("*");
+
+	private static final Map<String, Object> CERT_AUTH_CONFIG = Map.of(
+		"username_attribute", "cn",
+		"roles_attribute", "ou"
+	);
+
+	@ClassRule
+	public static final LocalCluster cluster = new LocalCluster.Builder()
+		.nodeSettings(Map.of("plugins.security.ssl.http.clientauth_mode", "OPTIONAL"))
+		.clusterManager(ClusterManager.THREE_CLUSTER_MANAGERS).anonymousAuth(false)
+		.authc(new AuthcDomain("clientcert_auth_domain", -1, true)
+			.httpAuthenticator(new HttpAuthenticator("clientcert").challenge(false)
+				.config(CERT_AUTH_CONFIG)).backend("noop"))
+		.authc(AUTHC_HTTPBASIC_INTERNAL).roles(ROLE_ALL_INDEX_SEARCH).users(USER_ADMIN)
+		.rolesMapping(new RolesMapping(ROLE_ALL_INDEX_SEARCH).backendRoles(BACKEND_ROLE_BRIDGE)).build();
+
+	private static final TestCertificates TEST_CERTIFICATES = cluster.getTestCertificates();
+
+	@Test
+	public void shouldAuthenticateUserWithBasicAuthWhenCertificateAuthenticationIsConfigured() {
+		try (TestRestClient client = cluster.getRestClient(USER_ADMIN)) {
+
+			HttpResponse response = client.getAuthInfo();
+
+			response.assertStatusCode(SC_OK);
+		}
+	}
+
+	@Test
+	public void shouldAuthenticateUserWithCertificate_positiveUserSpoke() {
+		CertificateData userSpockCertificate = TEST_CERTIFICATES.issueUserCertificate(BACKEND_ROLE_BRIDGE, USER_SPOCK);
+		try (TestRestClient client = cluster.getRestClient(userSpockCertificate)) {
+
+			client.assertCorrectCredentials(USER_SPOCK);
+		}
+	}
+
+	@Test
+	public void shouldAuthenticateUserWithCertificate_positiveUserKirk() {
+		CertificateData userSpockCertificate = TEST_CERTIFICATES.issueUserCertificate(BACKEND_ROLE_BRIDGE, USER_KIRK);
+		try (TestRestClient client = cluster.getRestClient(userSpockCertificate)) {
+
+			client.assertCorrectCredentials(USER_KIRK);
+		}
+	}
+
+	@Test
+	public void shouldAuthenticateUserWithCertificate_negative() {
+		CertificateData untrustedUserCertificate = TEST_CERTIFICATES.createSelfSignedCertificate("CN=untrusted");
+		try (TestRestClient client = cluster.getRestClient(untrustedUserCertificate)) {
+
+			HttpResponse response = client.getAuthInfo();
+
+			response.assertStatusCode(401);
+		}
+	}
+
+	@Test
+	public void shouldRetrieveBackendRoleFromCertificate_positiveRoleBridge() {
+		CertificateData userSpockCertificate = TEST_CERTIFICATES.issueUserCertificate(BACKEND_ROLE_BRIDGE, USER_KIRK);
+		try (TestRestClient client = cluster.getRestClient(userSpockCertificate)) {
+
+			HttpResponse response = client.getAuthInfo();
+
+			response.assertStatusCode(200);
+			List<String> backendRoles = response.getTextArrayFromJsonBody(POINTER_BACKEND_ROLES);
+			assertThat(backendRoles, hasSize(1));
+			assertThat(backendRoles, containsInAnyOrder(BACKEND_ROLE_BRIDGE));
+			List<String> roles = response.getTextArrayFromJsonBody(POINTER_ROLES);
+			assertThat(roles, hasSize(1));
+			assertThat(roles, containsInAnyOrder(ROLE_ALL_INDEX_SEARCH.getName()));
+		}
+	}
+
+	@Test
+	public void shouldRetrieveBackendRoleFromCertificate_positiveRoleCaptain() {
+		CertificateData userSpockCertificate = TEST_CERTIFICATES.issueUserCertificate(BACKEND_ROLE_CAPTAIN, USER_KIRK);
+		try (TestRestClient client = cluster.getRestClient(userSpockCertificate)) {
+
+			HttpResponse response = client.getAuthInfo();
+
+			response.assertStatusCode(200);
+			List<String> backendRoles = response.getTextArrayFromJsonBody(POINTER_BACKEND_ROLES);
+			assertThat(backendRoles, hasSize(1));
+			assertThat(backendRoles, containsInAnyOrder(BACKEND_ROLE_CAPTAIN));
+			List<String> roles = response.getTextArrayFromJsonBody(POINTER_ROLES);
+			assertThat(roles, hasSize(0));
+		}
+	}
+}

src/integrationTest/java/org/opensearch/test/framework/RolesMapping.java

@@ -0,0 +1,69 @@
+/*
+* Copyright OpenSearch Contributors
+* 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.
+*
+*/
+package org.opensearch.test.framework;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.opensearch.common.xcontent.ToXContentObject;
+import org.opensearch.common.xcontent.XContentBuilder;
+import org.opensearch.test.framework.TestSecurityConfig.Role;
+
+import static java.util.Objects.requireNonNull;
+
+public class RolesMapping implements ToXContentObject {
+	private String roleName;
+	private List<String> backendRoles;
+	private List<String> hosts;
+	private List<String> users;
+
+	private boolean reserved = false;
+
+	public RolesMapping(Role role) {
+		requireNonNull(role);
+		this.roleName = requireNonNull(role.getName());
+		this.backendRoles = new ArrayList<>();
+	}
+
+	public RolesMapping backendRoles(String...backendRoles) {
+		this.backendRoles.addAll(Arrays.asList(backendRoles));
+		return this;
+	}
+
+	public RolesMapping hosts(List<String> hosts) {
+		this.hosts = hosts;
+		return this;
+	}
+
+	public RolesMapping users(List<String> users) {
+		this.users = users;
+		return this;
+	}
+
+	public RolesMapping reserved(boolean reserved) {
+		this.reserved = reserved;
+		return this;
+	}
+
+	public String getRoleName() {
+		return roleName;
+	}
+
+	@Override
+	public XContentBuilder toXContent(XContentBuilder xContentBuilder, Params params) throws IOException {
+		xContentBuilder.startObject();
+		xContentBuilder.field("reserved", reserved);
+		xContentBuilder.field("backend_roles", backendRoles);
+		xContentBuilder.endObject();
+		return xContentBuilder;
+	}
+}

src/integrationTest/java/org/opensearch/test/framework/TestSecurityConfig.java

@@ -81,8 +81,8 @@ public class TestSecurityConfig {
 	private Config config = new Config();
 	private Map<String, User> internalUsers = new LinkedHashMap<>();
 	private Map<String, Role> roles = new LinkedHashMap<>();
-
 	private AuditConfiguration auditConfiguration;
+	private Map<String, RolesMapping> rolesMapping = new LinkedHashMap<>();
 
 	private String indexName = ".opendistro_security";
 
@@ -121,6 +121,9 @@ public TestSecurityConfig user(User user) {
 
 	public TestSecurityConfig roles(Role... roles) {
 		for (Role role : roles) {
+			if(this.roles.containsKey(role.name)) {
+				throw new IllegalStateException("Role with name " + role.name + " is already defined");
+			}
 			this.roles.put(role.name, role);
 		}
 
@@ -132,6 +135,17 @@ public TestSecurityConfig audit(AuditConfiguration auditConfiguration) {
 		return this;
 	}
 
+	public TestSecurityConfig rolesMapping(RolesMapping...mappings) {
+		for (RolesMapping mapping : mappings) {
+			String roleName = mapping.getRoleName();
+			if(rolesMapping.containsKey(roleName)) {
+				throw new IllegalArgumentException("Role mapping " + roleName + " already exists");
+			}
+			this.rolesMapping.put(roleName, mapping);
+		}
+		return this;
+	}
+
 	public static class Config implements ToXContentObject {
 		private boolean anonymousAuth;
 
@@ -529,7 +543,7 @@ public void initIndex(Client client) {
 		}
 		writeConfigToIndex(client, CType.ROLES, roles);
 		writeConfigToIndex(client, CType.INTERNALUSERS, internalUsers);
-		writeEmptyConfigToIndex(client, CType.ROLESMAPPING);
+		writeConfigToIndex(client, CType.ROLESMAPPING, rolesMapping);
 		writeEmptyConfigToIndex(client, CType.ACTIONGROUPS);
 		writeEmptyConfigToIndex(client, CType.TENANTS);
 

src/integrationTest/java/org/opensearch/test/framework/certificate/CertificateData.java

@@ -26,15 +26,19 @@
 
 package org.opensearch.test.framework.certificate;
 
+import java.security.Key;
 import java.security.KeyPair;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
 
 import org.bouncycastle.asn1.x500.X500Name;
 import org.bouncycastle.cert.X509CertificateHolder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
 
 /**
 * The class contains all data related to Certificate including private key which is considered to be a secret.
 */
-class CertificateData {
+public class CertificateData {
 
 	private final X509CertificateHolder certificate;
 	private final KeyPair keyPair;
@@ -53,6 +57,14 @@ public String certificateInPemFormat() {
 		return PemConverter.toPem(certificate);
 	}
 
+	public X509Certificate certificate() {
+		try {
+			return new JcaX509CertificateConverter().getCertificate(certificate);
+		} catch (CertificateException e) {
+			throw new RuntimeException("Cannot retrieve certificate", e);
+		}
+	}
+
 	/**
 	* It returns the private key associated with certificate encoded in PEM format. PEM format is defined by
 	* <a href="https://www.rfc-editor.org/rfc/rfc1421.txt">RFC 1421</a>.
@@ -70,4 +82,8 @@ X500Name getCertificateSubject() {
 	KeyPair getKeyPair() {
 		return keyPair;
 	}
+
+	public Key getKey() {
+		return keyPair.getPrivate();
+	}
 }

src/integrationTest/java/org/opensearch/test/framework/certificate/TestCertificates.java

@@ -93,6 +93,13 @@ private CertificateData createAdminCertificate() {
 				.issueSelfSignedCertificate(metadata);
 	}
 
+	public CertificateData createSelfSignedCertificate(String distinguishedName) {
+		CertificateMetadata metadata = CertificateMetadata.basicMetadata(distinguishedName, CERTIFICATE_VALIDITY_DAYS);
+		return CertificatesIssuerFactory
+			.rsaBaseCertificateIssuer()
+			.issueSelfSignedCertificate(metadata);
+	}
+
 	/**
 	* It returns the most trusted certificate. Certificates for nodes and users are derived from this certificate.
 	* @return file which contains certificate in PEM format, defined by <a href="https://www.rfc-editor.org/rfc/rfc1421.txt">RFC 1421</a>
@@ -131,6 +138,15 @@ private CertificateData createNodeCertificate(Integer node) {
 				.issueSignedCertificate(metadata, caCertificate);
 	}
 
+	public CertificateData issueUserCertificate(String organizationUnit, String username) {
+		String subject = String.format("DC=de,L=test,O=users,OU=%s,CN=%s", organizationUnit, username);
+		CertificateMetadata metadata = CertificateMetadata.basicMetadata(subject, CERTIFICATE_VALIDITY_DAYS)
+			.withKeyUsage(false, DIGITAL_SIGNATURE, NON_REPUDIATION, KEY_ENCIPHERMENT, CLIENT_AUTH, SERVER_AUTH);
+		return CertificatesIssuerFactory
+			.rsaBaseCertificateIssuer()
+			.issueSignedCertificate(metadata, caCertificate);
+	}
+
 	/**
 	* It returns private key associated with node certificate returned by method {@link #getNodeCertificate(int)}
 	*

src/integrationTest/java/org/opensearch/test/framework/cluster/LocalCluster.java

@@ -49,6 +49,7 @@
 import org.opensearch.plugins.Plugin;
 import org.opensearch.security.support.ConfigConstants;
 import org.opensearch.test.framework.AuditConfiguration;
+import org.opensearch.test.framework.RolesMapping;
 import org.opensearch.test.framework.TestIndex;
 import org.opensearch.test.framework.TestSecurityConfig;
 import org.opensearch.test.framework.TestSecurityConfig.Role;
@@ -359,6 +360,11 @@ public Builder roles(Role... roles) {
 			return this;
 		}
 
+		public Builder rolesMapping(RolesMapping...mappings) {
+			testSecurityConfig.rolesMapping(mappings);
+			return this;
+		}
+
 		public Builder authc(TestSecurityConfig.AuthcDomain authc) {
 			testSecurityConfig.authc(authc);
 			return this;