/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.wildfly.security.sasl.external;
import static org.wildfly.security._private.ElytronMessages.log;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.text.Normalizer;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import org.wildfly.security.sasl.util.SaslMechanismInformation;
import org.wildfly.security.util._private.Arrays2;
/**
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
*/
final class ExternalSaslServer implements SaslServer {
private final CallbackHandler cbh;
private boolean complete;
private String authorizationID;
ExternalSaslServer(final CallbackHandler cbh) {
this.cbh = cbh;
}
public String getMechanismName() {
return SaslMechanismInformation.Names.EXTERNAL;
}
public byte[] evaluateResponse(final byte[] response) throws SaslException {
if (complete) {
throw log.mechMessageAfterComplete(getMechanismName()).toSaslException();
}
complete = true;
String authorizationId;
if (response.length == 0) {
authorizationId = null;
} else {
authorizationId = Normalizer.normalize(new String(response, StandardCharsets.UTF_8), Normalizer.Form.NFKC);
if (authorizationId.indexOf(0) != -1) {
throw log.mechUserNameContainsInvalidCharacter(getMechanismName()).toSaslException();
}
}
final AuthorizeCallback authorizeCallback = new AuthorizeCallback(null, authorizationId);
try {
cbh.handle(Arrays2.of(authorizeCallback));
} catch (SaslException e) {
throw e;
} catch (IOException e) {
throw log.mechAuthorizationFailed(getMechanismName(), e).toSaslException();
} catch (UnsupportedCallbackException e) {
throw log.mechAuthorizationFailed(getMechanismName(), e).toSaslException();
}
if (!authorizeCallback.isAuthorized()) {
throw log.mechAuthorizationFailed(getMechanismName(), null, authorizationId).toSaslException();
}
this.authorizationID = authorizeCallback.getAuthorizedID();
return null;
}
public boolean isComplete() {
return complete;
}
public String getAuthorizationID() {
if (! complete) {
throw log.mechAuthenticationNotComplete(getMechanismName());
}
return authorizationID;
}
public byte[] unwrap(final byte[] incoming, final int offset, final int len) throws SaslException {
if (complete) {
throw log.mechNoSecurityLayer(getMechanismName());
} else {
throw log.mechAuthenticationNotComplete(getMechanismName());
}
}
public byte[] wrap(final byte[] outgoing, final int offset, final int len) throws SaslException {
if (complete) {
throw log.mechNoSecurityLayer(getMechanismName());
} else {
throw log.mechAuthenticationNotComplete(getMechanismName());
}
}
public Object getNegotiatedProperty(final String propName) {
return null;
}
public void dispose() throws SaslException {
}
}