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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.harmony.javax.security.sasl;
import java.security.Provider;
import java.security.Security;
import org.apache.harmony.javax.security.auth.callback.CallbackHandler;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Map;
import java.util.HashSet;
import java.util.Iterator;
public class Sasl {
// SaslClientFactory service name
private static final String CLIENTFACTORYSRV = "SaslClientFactory"; //$NON-NLS-1$
// SaslServerFactory service name
private static final String SERVERFACTORYSRV = "SaslServerFactory"; //$NON-NLS-1$
public static final String POLICY_NOPLAINTEXT = "javax.security.sasl.policy.noplaintext"; //$NON-NLS-1$
public static final String POLICY_NOACTIVE = "javax.security.sasl.policy.noactive"; //$NON-NLS-1$
public static final String POLICY_NODICTIONARY = "javax.security.sasl.policy.nodictionary"; //$NON-NLS-1$
public static final String POLICY_NOANONYMOUS = "javax.security.sasl.policy.noanonymous"; //$NON-NLS-1$
public static final String POLICY_FORWARD_SECRECY = "javax.security.sasl.policy.forward"; //$NON-NLS-1$
public static final String POLICY_PASS_CREDENTIALS = "javax.security.sasl.policy.credentials"; //$NON-NLS-1$
public static final String MAX_BUFFER = "javax.security.sasl.maxbuffer"; //$NON-NLS-1$
public static final String RAW_SEND_SIZE = "javax.security.sasl.rawsendsize"; //$NON-NLS-1$
public static final String REUSE = "javax.security.sasl.reuse"; //$NON-NLS-1$
public static final String QOP = "javax.security.sasl.qop"; //$NON-NLS-1$
public static final String STRENGTH = "javax.security.sasl.strength"; //$NON-NLS-1$
public static final String SERVER_AUTH = "javax.security.sasl.server.authentication"; //$NON-NLS-1$
// Default public constructor is overridden
private Sasl() {
super();
}
// Forms new instance of factory
private static Object newInstance(String factoryName, Provider prv) throws SaslException {
String msg = "auth.31"; //$NON-NLS-1$
Object factory;
ClassLoader cl = prv.getClass().getClassLoader();
if (cl == null) {
cl = ClassLoader.getSystemClassLoader();
}
try {
factory = (Class.forName(factoryName, true, cl)).newInstance();
return factory;
} catch (IllegalAccessException e) {
throw new SaslException(msg + factoryName, e);
} catch (ClassNotFoundException e) {
throw new SaslException(msg + factoryName, e);
} catch (InstantiationException e) {
throw new SaslException(msg + factoryName, e);
}
}
/**
* This method forms the list of SaslClient/SaslServer factories which are
* implemented in used providers
*/
private static Collection<?> findFactories(String service) {
HashSet<Object> fact = new HashSet<Object>();
Provider[] pp = Security.getProviders();
if ((pp == null) || (pp.length == 0)) {
return fact;
}
HashSet<String> props = new HashSet<String>();
for (int i = 0; i < pp.length; i++) {
String prName = pp[i].getName();
Enumeration<Object> keys = pp[i].keys();
while (keys.hasMoreElements()) {
String s = (String) keys.nextElement();
if (s.startsWith(service)) {
String prop = pp[i].getProperty(s);
try {
if (props.add(prName.concat(prop))) {
fact.add(newInstance(prop, pp[i]));
}
} catch (SaslException e) {
// ignore this factory
e.printStackTrace();
}
}
}
}
return fact;
}
@SuppressWarnings("unchecked")
public static Enumeration<SaslClientFactory> getSaslClientFactories() {
Collection<SaslClientFactory> res = (Collection<SaslClientFactory>) findFactories(CLIENTFACTORYSRV);
return Collections.enumeration(res);
}
@SuppressWarnings("unchecked")
public static Enumeration<SaslServerFactory> getSaslServerFactories() {
Collection<SaslServerFactory> res = (Collection<SaslServerFactory>) findFactories(SERVERFACTORYSRV);
return Collections.enumeration(res);
}
public static SaslServer createSaslServer(String mechanism, String protocol,
String serverName, Map<String, ?> prop, CallbackHandler cbh) throws SaslException {
if (mechanism == null) {
throw new NullPointerException("auth.32"); //$NON-NLS-1$
}
Collection<?> res = findFactories(SERVERFACTORYSRV);
if (res.isEmpty()) {
return null;
}
Iterator<?> iter = res.iterator();
while (iter.hasNext()) {
SaslServerFactory fact = (SaslServerFactory) iter.next();
String[] mech = fact.getMechanismNames(null);
boolean is = false;
if (mech != null) {
for (int j = 0; j < mech.length; j++) {
if (mech[j].equals(mechanism)) {
is = true;
break;
}
}
}
if (is) {
SaslServer saslS = fact.createSaslServer(mechanism, protocol, serverName, prop,
cbh);
if (saslS != null) {
return saslS;
}
}
}
return null;
}
public static SaslClient createSaslClient(String[] mechanisms, String authanticationID,
String protocol, String serverName, Map<String, ?> prop, CallbackHandler cbh)
throws SaslException {
if (mechanisms == null) {
throw new NullPointerException("auth.33"); //$NON-NLS-1$
}
Collection<?> res = findFactories(CLIENTFACTORYSRV);
if (res.isEmpty()) {
return null;
}
Iterator<?> iter = res.iterator();
while (iter.hasNext()) {
SaslClientFactory fact = (SaslClientFactory) iter.next();
String[] mech = fact.getMechanismNames(null);
boolean is = false;
if (mech != null) {
for (int j = 0; j < mech.length; j++) {
for (int n = 0; n < mechanisms.length; n++) {
if (mech[j].equals(mechanisms[n])) {
is = true;
break;
}
}
}
}
if (is) {
SaslClient saslC = fact.createSaslClient(mechanisms, authanticationID,
protocol, serverName, prop, cbh);
if (saslC != null) {
return saslC;
}
}
}
return null;
}
}
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