/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2007 Sun Microsystems, Inc.
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*/
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package org.opends.server.extensions;
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import java.security.MessageDigest;
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import java.security.cert.Certificate;
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import java.security.cert.X509Certificate;
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import javax.security.auth.x500.X500Principal;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.FingerprintCertificateMapperCfg;
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import org.opends.server.api.CertificateMapper;
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import org.opends.server.config.ConfigException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.protocols.internal.InternalClientConnection;
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import org.opends.server.protocols.internal.InternalSearchOperation;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.AttributeType;
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import org.opends.server.types.AttributeValue;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.DN;
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import org.opends.server.types.Entry;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ResultCode;
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import org.opends.server.types.SearchFilter;
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import org.opends.server.types.SearchResultEntry;
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import org.opends.server.types.SearchScope;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.types.DebugLogLevel;
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import static org.opends.server.messages.ExtensionsMessages.*;
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import static org.opends.server.messages.MessageHandler.*;
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import static org.opends.server.util.StaticUtils.*;
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/**
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* This class implements a very simple Directory Server certificate mapper that
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* will map a certificate to a user only if that user's entry contains an
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* attribute with the fingerprint of the client certificate. There must be
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* exactly one matching user entry for the mapping to be successful.
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*/
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public class FingerprintCertificateMapper
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extends CertificateMapper<FingerprintCertificateMapperCfg>
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implements ConfigurationChangeListener<
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FingerprintCertificateMapperCfg>
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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// The attribute type that will be used to map the certificate's fingerprint.
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private AttributeType fingerprintAttributeType;
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// The DN of the configuration entry for this certificate mapper.
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private DN configEntryDN;
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// The current configuration for this certificate mapper.
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private FingerprintCertificateMapperCfg currentConfig;
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// The algorithm that will be used to generate the fingerprint.
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private String fingerprintAlgorithm;
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/**
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* Creates a new instance of this certificate mapper. Note that all actual
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* initialization should be done in the
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* <CODE>initializeCertificateMapper</CODE> method.
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*/
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public FingerprintCertificateMapper()
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{
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super();
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}
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/**
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* {@inheritDoc}
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*/
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public void initializeCertificateMapper(
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FingerprintCertificateMapperCfg configuration)
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throws ConfigException, InitializationException
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{
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configuration.addFingerprintChangeListener(this);
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currentConfig = configuration;
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configEntryDN = configuration.dn();
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// Get the attribute type that will be used to hold the fingerprint.
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String attrName = configuration.getFingerprintAttribute();
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fingerprintAttributeType =
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DirectoryServer.getAttributeType(toLowerCase(attrName), false);
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if (fingerprintAttributeType == null)
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{
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int msgID = MSGID_FCM_NO_SUCH_ATTR;
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String message = getMessage(msgID, String.valueOf(configEntryDN),
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attrName);
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throw new ConfigException(msgID, message);
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}
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// Get the algorithm that will be used to generate the fingerprint.
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switch (configuration.getFingerprintAlgorithm())
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{
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case MD5:
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fingerprintAlgorithm = "MD5";
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break;
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case SHA1:
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fingerprintAlgorithm = "SHA1";
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break;
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}
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}
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/**
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* {@inheritDoc}
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*/
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public void finalizeCertificateMapper()
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{
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currentConfig.removeFingerprintChangeListener(this);
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}
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/**
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* {@inheritDoc}
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*/
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public Entry mapCertificateToUser(Certificate[] certificateChain)
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throws DirectoryException
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{
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FingerprintCertificateMapperCfg config = currentConfig;
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AttributeType fingerprintAttributeType = this.fingerprintAttributeType;
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String fingerprintAlgorithm = this.fingerprintAlgorithm;
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// Make sure that a peer certificate was provided.
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if ((certificateChain == null) || (certificateChain.length == 0))
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{
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int msgID = MSGID_FCM_NO_PEER_CERTIFICATE;
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String message = getMessage(msgID);
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throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message,
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msgID);
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}
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// Get the first certificate in the chain. It must be an X.509 certificate.
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X509Certificate peerCertificate;
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try
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{
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peerCertificate = (X509Certificate) certificateChain[0];
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}
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catch (Exception e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_FCM_PEER_CERT_NOT_X509;
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String message =
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getMessage(msgID, String.valueOf(certificateChain[0].getType()));
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throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message,
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msgID);
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}
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// Get the signature from the peer certificate and create a digest of it
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// using the configured algorithm.
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String fingerprintString;
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try
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{
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MessageDigest digest = MessageDigest.getInstance(fingerprintAlgorithm);
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byte[] fingerprintBytes = digest.digest(peerCertificate.getEncoded());
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fingerprintString = bytesToColonDelimitedHex(fingerprintBytes);
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}
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catch (Exception e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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String peerSubject = peerCertificate.getSubjectX500Principal().getName(
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X500Principal.RFC2253);
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int msgID = MSGID_FCM_CANNOT_CALCULATE_FINGERPRINT;
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String message = getMessage(msgID, peerSubject,
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getExceptionMessage(e));
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throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message,
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msgID);
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}
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// Create the search filter from the fingerprint.
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AttributeValue value =
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new AttributeValue(fingerprintAttributeType, fingerprintString);
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SearchFilter filter =
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SearchFilter.createEqualityFilter(fingerprintAttributeType, value);
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// If we have an explicit set of base DNs, then use it. Otherwise, use the
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// set of public naming contexts in the server.
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Collection<DN> baseDNs = config.getUserBaseDN();
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if ((baseDNs == null) || baseDNs.isEmpty())
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{
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baseDNs = DirectoryServer.getPublicNamingContexts().keySet();
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}
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// For each base DN, issue an internal search in an attempt to map the
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// certificate.
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Entry userEntry = null;
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InternalClientConnection conn =
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InternalClientConnection.getRootConnection();
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for (DN baseDN : baseDNs)
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{
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InternalSearchOperation searchOperation =
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conn.processSearch(baseDN, SearchScope.WHOLE_SUBTREE, filter);
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for (SearchResultEntry entry : searchOperation.getSearchEntries())
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{
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if (userEntry == null)
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{
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userEntry = entry;
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}
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else
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{
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int msgID = MSGID_FCM_MULTIPLE_MATCHING_ENTRIES;
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String message = getMessage(msgID, fingerprintString,
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String.valueOf(userEntry.getDN()),
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String.valueOf(entry.getDN()));
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throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message,
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msgID);
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}
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}
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}
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// If we've gotten here, then we either found exactly one user entry or we
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// didn't find any. Either way, return the entry or null to the caller.
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return userEntry;
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationChangeAcceptable(
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FingerprintCertificateMapperCfg configuration,
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List<String> unacceptableReasons)
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{
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boolean configAcceptable = true;
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// Make sure that the fingerprint attribute is defined in the server schema.
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String attrName = configuration.getFingerprintAttribute();
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AttributeType newFingerprintType =
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DirectoryServer.getAttributeType(toLowerCase(attrName),
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false);
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if (newFingerprintType == null)
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{
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unacceptableReasons.add(getMessage(MSGID_FCM_NO_SUCH_ATTR,
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String.valueOf(configEntryDN),
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attrName));
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configAcceptable = false;
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}
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return configAcceptable;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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FingerprintCertificateMapperCfg configuration)
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{
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<String> messages = new ArrayList<String>();
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// Make sure that the fingerprint attribute is defined in the server schema.
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String attrName = configuration.getFingerprintAttribute();
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AttributeType newFingerprintType =
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DirectoryServer.getAttributeType(toLowerCase(attrName),
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false);
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if (newFingerprintType == null)
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{
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if (resultCode == ResultCode.SUCCESS)
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{
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resultCode = ResultCode.NO_SUCH_ATTRIBUTE;
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}
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messages.add(getMessage(MSGID_FCM_NO_SUCH_ATTR,
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String.valueOf(configEntryDN), attrName));
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}
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// Get the algorithm that will be used to generate the fingerprint.
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String newFingerprintAlgorithm = null;
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switch (configuration.getFingerprintAlgorithm())
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{
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case MD5:
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newFingerprintAlgorithm = "MD5";
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break;
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case SHA1:
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newFingerprintAlgorithm = "SHA1";
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break;
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}
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if (resultCode == ResultCode.SUCCESS)
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{
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fingerprintAttributeType = newFingerprintType;
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fingerprintAlgorithm = newFingerprintAlgorithm;
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currentConfig = configuration;
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}
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return new ConfigChangeResult(resultCode, adminActionRequired, messages);
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}
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}
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