hadoop SaslPlainServer 源码
haddop SaslPlainServer 代码
文件路径:/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SaslPlainServer.java
/**
* 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.hadoop.security;
import java.security.Provider;
import java.util.Map;
import javax.security.auth.callback.*;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.Sasl;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import javax.security.sasl.SaslServerFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class SaslPlainServer implements SaslServer {
@SuppressWarnings("serial")
public static class SecurityProvider extends Provider {
public SecurityProvider() {
super("SaslPlainServer", 1.0, "SASL PLAIN Authentication Server");
put("SaslServerFactory.PLAIN",
SaslPlainServerFactory.class.getName());
}
}
public static class SaslPlainServerFactory implements SaslServerFactory {
@Override
public SaslServer createSaslServer(String mechanism, String protocol,
String serverName, Map<String,?> props, CallbackHandler cbh)
throws SaslException {
return "PLAIN".equals(mechanism) ? new SaslPlainServer(cbh) : null;
}
@Override
public String[] getMechanismNames(Map<String,?> props){
return (props == null) || "false".equals(props.get(Sasl.POLICY_NOPLAINTEXT))
? new String[]{"PLAIN"}
: new String[0];
}
}
private CallbackHandler cbh;
private boolean completed;
private String authz;
SaslPlainServer(CallbackHandler callback) {
this.cbh = callback;
}
@Override
public String getMechanismName() {
return "PLAIN";
}
@Override
public byte[] evaluateResponse(byte[] response) throws SaslException {
if (completed) {
throw new IllegalStateException("PLAIN authentication has completed");
}
if (response == null) {
throw new IllegalArgumentException("Received null response");
}
try {
String payload;
try {
payload = new String(response, "UTF-8");
} catch (Exception e) {
throw new IllegalArgumentException("Received corrupt response", e);
}
// [ authz, authn, password ]
String[] parts = payload.split("\u0000", 3);
if (parts.length != 3) {
throw new IllegalArgumentException("Received corrupt response");
}
if (parts[0].isEmpty()) { // authz = authn
parts[0] = parts[1];
}
NameCallback nc = new NameCallback("SASL PLAIN");
nc.setName(parts[1]);
PasswordCallback pc = new PasswordCallback("SASL PLAIN", false);
pc.setPassword(parts[2].toCharArray());
AuthorizeCallback ac = new AuthorizeCallback(parts[1], parts[0]);
cbh.handle(new Callback[]{nc, pc, ac});
if (ac.isAuthorized()) {
authz = ac.getAuthorizedID();
}
} catch (Exception e) {
throw new SaslException("PLAIN auth failed: " + e.toString(), e);
} finally {
completed = true;
}
return null;
}
private void throwIfNotComplete() {
if (!completed) {
throw new IllegalStateException("PLAIN authentication not completed");
}
}
@Override
public boolean isComplete() {
return completed;
}
@Override
public String getAuthorizationID() {
throwIfNotComplete();
return authz;
}
@Override
public Object getNegotiatedProperty(String propName) {
throwIfNotComplete();
return Sasl.QOP.equals(propName) ? "auth" : null;
}
@Override
public byte[] wrap(byte[] outgoing, int offset, int len)
throws SaslException {
throwIfNotComplete();
throw new IllegalStateException(
"PLAIN supports neither integrity nor privacy");
}
@Override
public byte[] unwrap(byte[] incoming, int offset, int len)
throws SaslException {
throwIfNotComplete();
throw new IllegalStateException(
"PLAIN supports neither integrity nor privacy");
}
@Override
public void dispose() throws SaslException {
cbh = null;
authz = null;
}
}
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