/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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 org.apache.directory.server.ssl;


import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import java.security.cert.X509Certificate;
import java.util.Hashtable;

import javax.naming.ldap.InitialLdapContext;
import javax.naming.ldap.LdapContext;
import javax.naming.ldap.StartTlsRequest;
import javax.naming.ldap.StartTlsResponse;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSession;

import org.apache.directory.api.util.Network;
import org.apache.directory.api.util.Strings;
import org.apache.directory.server.annotations.CreateLdapServer;
import org.apache.directory.server.annotations.CreateTransport;
import org.apache.directory.server.core.annotations.CreateDS;
import org.apache.directory.server.core.integ.AbstractLdapTestUnit;
import org.apache.directory.server.core.integ.ApacheDSTestExtension;
import org.apache.directory.server.ldap.handlers.extended.StartTlsHandler;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;


/**
 * Test case to verify proper operation of confidentiality requirements as 
 * specified in https://issues.apache.org/jira/browse/DIRSERVER-1189.  
 * 
 * Starts up the server binds via SUN JNDI provider to perform various 
 * operations on entries which should be rejected when a TLS secured 
 * connection is not established.
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
@ExtendWith( { ApacheDSTestExtension.class } )
@CreateDS(allowAnonAccess = true, name = "StartTlsUpdateCertificateIT-class")
@CreateLdapServer(
    transports =
        {
            @CreateTransport(protocol = "LDAP"),
            @CreateTransport(protocol = "LDAPS")
    },
    extendedOpHandlers =
        { StartTlsHandler.class })
public class StartTlsUpdateCertificateIT extends AbstractLdapTestUnit
{
    boolean oldConfidentialityRequiredValue;


    /**
     * Sets up the key store and installs the self signed certificate for the 
     * server (created on first startup) which is to be used by the StartTLS 
     * JDNDI client that will connect.  The key store is created from scratch
     * programmatically and whipped on each run.  The certificate is acquired 
     * by pulling down the bytes for administrator's userCertificate from 
     * uid=admin,ou=system.  We use sysRoot direct context instead of one over
     * the wire since the server is configured to prevent connections without
     * TLS secured connections.
     */
    @BeforeEach
    public void installKeyStoreWithCertificate() throws Exception
    {
        oldConfidentialityRequiredValue = getLdapServer().isConfidentialityRequired();
    }


    /**
     * Just deletes the generated key store file.
     */
    @AfterEach
    public void deleteKeyStore() throws Exception
    {
        getLdapServer().setConfidentialityRequired( oldConfidentialityRequiredValue );
    }


    /**
     * Test for DIRSERVER-1373.
     */
    @Test
    public void testUpdateCertificate() throws Exception
    {
        // create a secure connection
        Hashtable<String, Object> env = setDefaultJNDIEnv();
        env.put( "java.naming.provider.url", Network.ldapLoopbackUrl( getLdapServer().getPort() ) );
        LdapContext ctx = new InitialLdapContext( env, null );
        StartTlsResponse tls = ( StartTlsResponse ) ctx.extendedOperation( new StartTlsRequest() );
        tls.setHostnameVerifier( new HostnameVerifier()
        {
            public boolean verify( String hostname, SSLSession session )
            {
                return true;
            }
        } );
        tls.negotiate( BogusSSLContextFactory.getInstance( false ).getSocketFactory() );

        // create a new certificate
        // create a new certificate
        String newIssuerDN = "new_issuer_dn";
        String newSubjectDN = "new_subject_dn";
        changeCertificate( ldapServer.getKeystoreFile(), "secret", newIssuerDN, newSubjectDN, 365, "SHA256WithECDSA" );

        getLdapServer().reloadSslContext();

        // create a new secure connection
        ctx = new InitialLdapContext( env, null );
        tls = ( StartTlsResponse ) ctx.extendedOperation( new StartTlsRequest() );
        tls.setHostnameVerifier( new HostnameVerifier()
        {
            public boolean verify( String hostname, SSLSession session )
            {
                return true;
            }
        } );
        
        tls.negotiate( BogusSSLContextFactory.getInstance( false ).getSocketFactory() );

        // check the received certificate, it must contain the updated server certificate
        X509Certificate[] lastReceivedServerCertificates = BogusTrustManagerFactory.lastReceivedServerCertificates;
        assertNotNull( lastReceivedServerCertificates );
        assertEquals( 1, lastReceivedServerCertificates.length );
        String issuerDN = lastReceivedServerCertificates[0].getIssuerDN().getName();
        String subjectDN = lastReceivedServerCertificates[0].getSubjectDN().getName();
        assertEquals( 
            Strings.toLowerCaseAscii( issuerDN ), 
            Strings.toLowerCaseAscii( "CN=new_issuer_dn, OU=directory, O=apache, C=US" ),
            "Expected the new certificate with the new issuer" );
        assertEquals( 
            Strings.toLowerCaseAscii( subjectDN ), 
            Strings.toLowerCaseAscii( "CN=new_subject_dn, OU=directory, O=apache, C=US" ),
            "Expected the new certificate with the new subject" );
    }
}
