Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* JBoss, Home of Professional Open Source.
* Copyright 2016 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.util;
import static org.wildfly.common.Assert.checkNotNullParam;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Map;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import javax.security.sasl.SaslServerFactory;
import org.wildfly.common.iteration.CodePointIterator;
import org.wildfly.security.auth.callback.AvailableRealmsCallback;
import org.wildfly.security.sasl.WildFlySasl;
/**
* A {@link SaslServerFactory} which sets the server's available realms using the legacy {@link WildFlySasl#REALM_LIST}
* property, if specified.
*
* @author Farah Juma
*/
public final class AvailableRealmsSaslServerFactory extends AbstractDelegatingSaslServerFactory {
public static final int DEFAULT_DELIMITER = ' ';
public static final int DEFAULT_ESCAPE_CHARACTER = '\\';
private final int escapeCharacter;
private final int[] delims;
/**
* Construct a new instance. The delimiter used to separate the realm names in the list of realms is assumed to be
* {@value #DEFAULT_DELIMITER}. The escape character is assumed to be {@value #DEFAULT_ESCAPE_CHARACTER}.
*
* @param delegate the delegate {@code SaslServerFactory}
*/
public AvailableRealmsSaslServerFactory(final SaslServerFactory delegate) {
this(delegate, DEFAULT_ESCAPE_CHARACTER, DEFAULT_DELIMITER);
}
/**
* Construct a new instance.
*
* @param delegate the delegate {@code SaslServerFactory}
* @param escapeCharacter the escape character
* @param delims the delimiters that separate the realm names in the list of realms
*/
public AvailableRealmsSaslServerFactory(final SaslServerFactory delegate, final int escapeCharacter, final int... delims) {
super(delegate);
this.escapeCharacter = checkNotNullParam("escapeCharacter", escapeCharacter);
this.delims = checkNotNullParam("delims", delims);
}
public SaslServer createSaslServer(final String mechanism, final String protocol, final String serverName, final Map props, final CallbackHandler cbh) throws SaslException {
final String realmList = (String) props.get(WildFlySasl.REALM_LIST);
if (realmList == null) {
// The legacy REALM_LIST property wasn't specified
return delegate.createSaslServer(mechanism, protocol, serverName, props, cbh);
}
return delegate.createSaslServer(mechanism, protocol, serverName, props, callbacks -> {
final ArrayList list = new ArrayList<>(Arrays.asList(callbacks));
final Iterator iterator = list.iterator();
while (iterator.hasNext()) {
Callback callback = iterator.next();
if (callback instanceof AvailableRealmsCallback) {
String[] realms = realmListPropertyToArray(realmList, escapeCharacter, delims);
((AvailableRealmsCallback) callback).setRealmNames(realms);
iterator.remove();
}
}
if (! list.isEmpty()) {
cbh.handle(list.toArray(new Callback[list.size()]));
}
});
}
static String[] realmListPropertyToArray(String realmList) {
return realmListPropertyToArray(realmList, DEFAULT_ESCAPE_CHARACTER, DEFAULT_DELIMITER);
}
static String[] realmListPropertyToArray(String realmList, int escapeCharacter, int... delims) {
if (realmList == null) {
return null;
}
final int[] escapeCharacterAndDelims = Arrays.copyOf(delims, delims.length + 1);
escapeCharacterAndDelims[escapeCharacterAndDelims.length - 1] = escapeCharacter;
final CodePointIterator cpi = CodePointIterator.ofString(realmList);
final CodePointIterator di = cpi.delimitedBy(escapeCharacterAndDelims);
final ArrayList realms = new ArrayList<>();
StringBuilder realm = new StringBuilder();
while (cpi.hasNext()) {
if (di.hasNext()) {
di.drainTo(realm);
} else {
if (cpi.peekNext() == escapeCharacter) {
cpi.next(); // skip the escape character
if (cpi.hasNext()) {
realm.append((char) cpi.next());
}
} else {
// reached the end of a realm name
realms.add(realm.toString());
skipDelims(di, cpi, delims);
realm = new StringBuilder();
}
}
}
realms.add(realm.toString());
return realms.toArray(new String[realms.size()]);
}
private static boolean isDelim(int c, int... delims) {
for (int delim : delims) {
if (delim == c) {
return true;
}
}
return false;
}
private static void skipDelims(CodePointIterator di, CodePointIterator cpi, int... delims) {
while ((! di.hasNext()) && cpi.hasNext() && isDelim(cpi.peekNext(), delims)) {
cpi.next();
}
}
}
