/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
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* with the License.
*
* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
* or http://forgerock.org/license/CDDLv1.0.html.
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* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at legal-notices/CDDLv1_0.txt.
* If applicable, add the following below this CDDL HEADER, with the
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*
* Copyright 2007-2008 Sun Microsystems, Inc.
* Portions Copyright 2012-2015 ForgeRock AS
*/
package org.opends.server.extensions;
import java.security.MessageDigest;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import javax.security.auth.x500.X500Principal;
import org.forgerock.i18n.LocalizableMessage;
import org.forgerock.i18n.slf4j.LocalizedLogger;
import org.forgerock.opendj.config.server.ConfigChangeResult;
import org.forgerock.opendj.config.server.ConfigException;
import org.forgerock.opendj.ldap.ByteString;
import org.forgerock.opendj.ldap.ResultCode;
import org.forgerock.opendj.ldap.SearchScope;
import org.opends.server.admin.server.ConfigurationChangeListener;
import org.opends.server.admin.std.server.CertificateMapperCfg;
import org.opends.server.admin.std.server.FingerprintCertificateMapperCfg;
import org.opends.server.api.Backend;
import org.opends.server.api.CertificateMapper;
import org.opends.server.core.DirectoryServer;
import org.opends.server.protocols.internal.InternalClientConnection;
import org.opends.server.protocols.internal.InternalSearchOperation;
import org.opends.server.protocols.internal.SearchRequest;
import static org.opends.server.protocols.internal.Requests.*;
import org.opends.server.types.*;
import static org.opends.messages.ExtensionMessages.*;
import static org.opends.server.protocols.internal.InternalClientConnection.*;
import static org.opends.server.util.CollectionUtils.*;
import static org.opends.server.util.StaticUtils.*;
/**
* This class implements a very simple Directory Server certificate mapper that
* will map a certificate to a user only if that user's entry contains an
* attribute with the fingerprint of the client certificate. There must be
* exactly one matching user entry for the mapping to be successful.
*/
public class FingerprintCertificateMapper
extends CertificateMapper<FingerprintCertificateMapperCfg>
implements ConfigurationChangeListener<
FingerprintCertificateMapperCfg>
{
private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
/** The DN of the configuration entry for this certificate mapper. */
private DN configEntryDN;
/** The current configuration for this certificate mapper. */
private FingerprintCertificateMapperCfg currentConfig;
/** The algorithm that will be used to generate the fingerprint. */
private String fingerprintAlgorithm;
/** The set of attributes to return in search result entries. */
private LinkedHashSet<String> requestedAttributes;
/**
* Creates a new instance of this certificate mapper. Note that all actual
* initialization should be done in the
* <CODE>initializeCertificateMapper</CODE> method.
*/
public FingerprintCertificateMapper()
{
super();
}
/** {@inheritDoc} */
@Override
public void initializeCertificateMapper(
FingerprintCertificateMapperCfg configuration)
throws ConfigException, InitializationException
{
configuration.addFingerprintChangeListener(this);
currentConfig = configuration;
configEntryDN = configuration.dn();
// Get the algorithm that will be used to generate the fingerprint.
switch (configuration.getFingerprintAlgorithm())
{
case MD5:
fingerprintAlgorithm = "MD5";
break;
case SHA1:
fingerprintAlgorithm = "SHA1";
break;
}
// Make sure that the fingerprint attribute is configured for equality in
// all appropriate backends.
Set<DN> cfgBaseDNs = configuration.getUserBaseDN();
if (cfgBaseDNs == null || cfgBaseDNs.isEmpty())
{
cfgBaseDNs = DirectoryServer.getPublicNamingContexts().keySet();
}
AttributeType t = configuration.getFingerprintAttribute();
for (DN baseDN : cfgBaseDNs)
{
Backend b = DirectoryServer.getBackend(baseDN);
if (b != null && ! b.isIndexed(t, IndexType.EQUALITY))
{
logger.warn(WARN_SATUACM_ATTR_UNINDEXED, configuration.dn(),
t.getNameOrOID(), b.getBackendID());
}
}
// Create the attribute list to include in search requests. We want to
// include all user and operational attributes.
requestedAttributes = newLinkedHashSet("*", "+");
}
/** {@inheritDoc} */
@Override
public void finalizeCertificateMapper()
{
currentConfig.removeFingerprintChangeListener(this);
}
/** {@inheritDoc} */
@Override
public Entry mapCertificateToUser(Certificate[] certificateChain)
throws DirectoryException
{
FingerprintCertificateMapperCfg config = currentConfig;
AttributeType fingerprintAttributeType = config.getFingerprintAttribute();
String theFingerprintAlgorithm = this.fingerprintAlgorithm;
// Make sure that a peer certificate was provided.
if (certificateChain == null || certificateChain.length == 0)
{
LocalizableMessage message = ERR_FCM_NO_PEER_CERTIFICATE.get();
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message);
}
// Get the first certificate in the chain. It must be an X.509 certificate.
X509Certificate peerCertificate;
try
{
peerCertificate = (X509Certificate) certificateChain[0];
}
catch (Exception e)
{
logger.traceException(e);
LocalizableMessage message = ERR_FCM_PEER_CERT_NOT_X509.get(
certificateChain[0].getType());
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message);
}
// Get the signature from the peer certificate and create a digest of it
// using the configured algorithm.
String fingerprintString;
try
{
MessageDigest digest = MessageDigest.getInstance(theFingerprintAlgorithm);
byte[] fingerprintBytes = digest.digest(peerCertificate.getEncoded());
fingerprintString = bytesToColonDelimitedHex(fingerprintBytes);
}
catch (Exception e)
{
logger.traceException(e);
String peerSubject = peerCertificate.getSubjectX500Principal().getName(
X500Principal.RFC2253);
LocalizableMessage message = ERR_FCM_CANNOT_CALCULATE_FINGERPRINT.get(
peerSubject, getExceptionMessage(e));
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message);
}
// Create the search filter from the fingerprint.
ByteString value = ByteString.valueOfUtf8(fingerprintString);
SearchFilter filter =
SearchFilter.createEqualityFilter(fingerprintAttributeType, value);
// If we have an explicit set of base DNs, then use it. Otherwise, use the
// set of public naming contexts in the server.
Collection<DN> baseDNs = config.getUserBaseDN();
if (baseDNs == null || baseDNs.isEmpty())
{
baseDNs = DirectoryServer.getPublicNamingContexts().keySet();
}
// For each base DN, issue an internal search in an attempt to map the
// certificate.
Entry userEntry = null;
InternalClientConnection conn = getRootConnection();
for (DN baseDN : baseDNs)
{
final SearchRequest request = newSearchRequest(baseDN, SearchScope.WHOLE_SUBTREE, filter)
.setSizeLimit(1)
.setTimeLimit(10)
.addAttribute(requestedAttributes);
InternalSearchOperation searchOperation = conn.processSearch(request);
switch (searchOperation.getResultCode().asEnum())
{
case SUCCESS:
// This is fine. No action needed.
break;
case NO_SUCH_OBJECT:
// The search base doesn't exist. Not an ideal situation, but we'll
// ignore it.
break;
case SIZE_LIMIT_EXCEEDED:
// Multiple entries matched the filter. This is not acceptable.
LocalizableMessage message = ERR_FCM_MULTIPLE_SEARCH_MATCHING_ENTRIES.get(
fingerprintString);
throw new DirectoryException(
ResultCode.INVALID_CREDENTIALS, message);
case TIME_LIMIT_EXCEEDED:
case ADMIN_LIMIT_EXCEEDED:
// The search criteria was too inefficient.
message = ERR_FCM_INEFFICIENT_SEARCH.get(fingerprintString, searchOperation.getErrorMessage());
throw new DirectoryException(searchOperation.getResultCode(),
message);
default:
// Just pass on the failure that was returned for this search.
message = ERR_FCM_SEARCH_FAILED.get(fingerprintString, searchOperation.getErrorMessage());
throw new DirectoryException(searchOperation.getResultCode(),
message);
}
for (SearchResultEntry entry : searchOperation.getSearchEntries())
{
if (userEntry == null)
{
userEntry = entry;
}
else
{
LocalizableMessage message = ERR_FCM_MULTIPLE_MATCHING_ENTRIES.
get(fingerprintString, userEntry.getName(), entry.getName());
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS, message);
}
}
}
// If we've gotten here, then we either found exactly one user entry or we
// didn't find any. Either way, return the entry or null to the caller.
return userEntry;
}
/** {@inheritDoc} */
@Override
public boolean isConfigurationAcceptable(CertificateMapperCfg configuration,
List<LocalizableMessage> unacceptableReasons)
{
FingerprintCertificateMapperCfg config =
(FingerprintCertificateMapperCfg) configuration;
return isConfigurationChangeAcceptable(config, unacceptableReasons);
}
/** {@inheritDoc} */
@Override
public boolean isConfigurationChangeAcceptable(
FingerprintCertificateMapperCfg configuration,
List<LocalizableMessage> unacceptableReasons)
{
return true;
}
/** {@inheritDoc} */
@Override
public ConfigChangeResult applyConfigurationChange(
FingerprintCertificateMapperCfg configuration)
{
final ConfigChangeResult ccr = new ConfigChangeResult();
// Get the algorithm that will be used to generate the fingerprint.
String newFingerprintAlgorithm = null;
switch (configuration.getFingerprintAlgorithm())
{
case MD5:
newFingerprintAlgorithm = "MD5";
break;
case SHA1:
newFingerprintAlgorithm = "SHA1";
break;
}
if (ccr.getResultCode() == ResultCode.SUCCESS)
{
fingerprintAlgorithm = newFingerprintAlgorithm;
currentConfig = configuration;
}
// Make sure that the fingerprint attribute is configured for equality in
// all appropriate backends.
Set<DN> cfgBaseDNs = configuration.getUserBaseDN();
if (cfgBaseDNs == null || cfgBaseDNs.isEmpty())
{
cfgBaseDNs = DirectoryServer.getPublicNamingContexts().keySet();
}
AttributeType t = configuration.getFingerprintAttribute();
for (DN baseDN : cfgBaseDNs)
{
Backend b = DirectoryServer.getBackend(baseDN);
if (b != null && ! b.isIndexed(t, IndexType.EQUALITY))
{
LocalizableMessage message = WARN_SATUACM_ATTR_UNINDEXED.get(
configuration.dn(), t.getNameOrOID(), b.getBackendID());
ccr.addMessage(message);
logger.error(message);
}
}
return ccr;
}
}