/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.domain.management.security;
import static org.jboss.as.domain.management.DomainManagementMessages.MESSAGES;
import static org.jboss.as.domain.management.ModelDescriptionConstants.MECHANISM;
import static org.jboss.as.domain.management.RealmConfigurationConstants.DIGEST_PLAIN_TEXT;
import static org.jboss.as.domain.management.RealmConfigurationConstants.VERIFY_PASSWORD_CALLBACK_SUPPORTED;
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.RealmCallback;
import org.jboss.as.domain.management.AuthenticationMechanism;
import org.jboss.as.domain.management.plugin.AuthenticationPlugIn;
import org.jboss.as.domain.management.plugin.Credential;
import org.jboss.as.domain.management.plugin.DigestCredential;
import org.jboss.as.domain.management.plugin.Identity;
import org.jboss.as.domain.management.plugin.PasswordCredential;
import org.jboss.as.domain.management.plugin.PlugInConfigurationSupport;
import org.jboss.as.domain.management.plugin.ValidatePasswordCredential;
import org.jboss.dmr.ModelNode;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.sasl.callback.DigestHashCallback;
import org.jboss.sasl.callback.VerifyPasswordCallback;
import org.jboss.sasl.util.UsernamePasswordHashUtil;
/**
* CallbackHandlerService to integrate the plug-ins.
*
* @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
*/
public class PlugInAuthenticationCallbackHandler extends AbstractPlugInService implements Service<CallbackHandlerService>,
CallbackHandlerService {
public static final String SERVICE_SUFFIX = "plug-in-authentication";
private static UsernamePasswordHashUtil hashUtil = null;
private final ModelNode model;
private final String realmName;
private AuthenticationMechanism mechanism;
PlugInAuthenticationCallbackHandler(final String realmName,
final ModelNode model) {
super(model);
this.realmName = realmName;
this.model = model;
}
/*
* Service Methods
*/
@Override
public void start(final StartContext context) throws StartException {
super.start(context);
if (model.hasDefined(MECHANISM)) {
mechanism = AuthenticationMechanism.valueOf(model.require(MECHANISM).asString());
} else {
mechanism = AuthenticationMechanism.DIGEST;
}
}
public void stop(final StopContext context) {
mechanism = null;
}
public CallbackHandlerService getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
private static UsernamePasswordHashUtil getHashUtil() {
if (hashUtil == null) {
try {
hashUtil = new UsernamePasswordHashUtil();
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(e);
}
}
return hashUtil;
}
/*
* CallbackHandlerService Methods
*/
public AuthenticationMechanism getPreferredMechanism() {
return mechanism;
}
public Set<AuthenticationMechanism> getSupplementaryMechanisms() {
return Collections.emptySet();
}
public Map<String, String> getConfigurationOptions() {
if (mechanism == AuthenticationMechanism.DIGEST) {
// If the plug-in returns a plain text password we can hash it.
return Collections.singletonMap(DIGEST_PLAIN_TEXT, Boolean.FALSE.toString());
} else {
return Collections.singletonMap(VERIFY_PASSWORD_CALLBACK_SUPPORTED, Boolean.TRUE.toString());
}
}
public boolean isReady() {
return true;
}
public CallbackHandler getCallbackHandler(final Map<String, Object> sharedState) {
final String name = getPlugInName();
final AuthenticationPlugIn<Credential> ap = getPlugInLoader().loadAuthenticationPlugIn(name);
if (ap instanceof PlugInConfigurationSupport) {
PlugInConfigurationSupport pcf = (PlugInConfigurationSupport) ap;
try {
pcf.init(getConfiguration(), sharedState);
} catch (IOException e) {
throw MESSAGES.unableToInitialisePlugIn(name, e.getMessage());
}
}
return new CallbackHandler() {
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
List<Callback> toRespondTo = new LinkedList<Callback>();
String userName = null;
Credential credential = null;
// A single pass may be sufficient but by using a two pass approach the Callbackhandler will not
// fail if an unexpected order is encountered.
// First Pass - is to double check no unsupported callbacks and to retrieve
// information from the callbacks passing in information.
for (Callback current : callbacks) {
if (current instanceof AuthorizeCallback) {
toRespondTo.add(current);
} else if (current instanceof NameCallback) {
NameCallback nameCallback = (NameCallback) current;
userName = nameCallback.getDefaultName();
Identity identity = ap.loadIdentity(userName, realmName);
if (identity != null) {
credential = identity.getCredential();
}
} else if (current instanceof PasswordCallback) {
toRespondTo.add(current);
} else if (current instanceof DigestHashCallback) {
toRespondTo.add(current);
} else if (current instanceof VerifyPasswordCallback) {
toRespondTo.add(current);
} else if (current instanceof RealmCallback) {
String realm = ((RealmCallback) current).getDefaultText();
if (realmName.equals(realm) == false) {
throw MESSAGES.invalidRealm(realm, realmName);
}
} else {
throw new UnsupportedCallbackException(current);
}
}
// Second Pass - Now iterate the Callback(s) requiring a response.
for (Callback current : toRespondTo) {
if (current instanceof AuthorizeCallback) {
AuthorizeCallback authorizeCallback = (AuthorizeCallback) current;
// Don't support impersonating another identity
authorizeCallback.setAuthorized(authorizeCallback.getAuthenticationID().equals(
authorizeCallback.getAuthorizationID()));
} else if (current instanceof PasswordCallback) {
if (credential == null) {
throw new UserNotFoundException(userName);
}
if (credential instanceof PasswordCredential) {
((PasswordCallback) current).setPassword(((PasswordCredential) credential).getPassword());
} else {
throw new UnsupportedCallbackException(current);
}
} else if (current instanceof DigestHashCallback) {
if (credential == null) {
throw new UserNotFoundException(userName);
}
if (credential instanceof DigestCredential) {
((DigestHashCallback) current).setHexHash(((DigestCredential) credential).getHash());
} else if (credential instanceof PasswordCredential) {
UsernamePasswordHashUtil hashUtil = getHashUtil();
String hash;
synchronized (hashUtil) {
hash = hashUtil.generateHashedHexURP(userName, realmName,
((PasswordCredential) credential).getPassword());
}
((DigestHashCallback) current).setHexHash(hash);
} else {
throw new UnsupportedCallbackException(current);
}
} else if (current instanceof VerifyPasswordCallback) {
if (credential == null) {
throw new UserNotFoundException(userName);
}
VerifyPasswordCallback vpc = (VerifyPasswordCallback) current;
if (credential instanceof PasswordCredential) {
vpc.setVerified(Arrays.equals(((PasswordCredential) credential).getPassword(), vpc.getPassword()
.toCharArray()));
} else if (credential instanceof DigestCredential) {
UsernamePasswordHashUtil hashUtil = getHashUtil();
String hash;
synchronized (hashUtil) {
hash = hashUtil.generateHashedHexURP(userName, realmName, vpc.getPassword().toCharArray());
}
String expected = ((DigestCredential) credential).getHash();
vpc.setVerified(expected.equals(hash));
} else if (credential instanceof ValidatePasswordCredential) {
vpc.setVerified(((ValidatePasswordCredential) credential).validatePassword(vpc.getPassword()
.toCharArray()));
}
}
}
}
};
}
}