| /** |
| * 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 backtype.storm.messaging.netty; |
| |
| import java.io.IOException; |
| |
| 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 javax.security.sasl.Sasl; |
| import javax.security.sasl.SaslException; |
| import javax.security.sasl.SaslServer; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| class SaslNettyServer { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(SaslNettyServer.class); |
| |
| private SaslServer saslServer; |
| |
| SaslNettyServer(String topologyName, byte[] token) throws IOException { |
| LOG.debug("SaslNettyServer: Topology token is: {} with authmethod {}", |
| topologyName, SaslUtils.AUTH_DIGEST_MD5); |
| |
| try { |
| SaslDigestCallbackHandler ch = new SaslNettyServer.SaslDigestCallbackHandler( |
| topologyName, token); |
| |
| saslServer = Sasl.createSaslServer(SaslUtils.AUTH_DIGEST_MD5, null, |
| SaslUtils.DEFAULT_REALM, |
| SaslUtils.getSaslProps(), ch); |
| } catch (SaslException e) { |
| LOG.error("SaslNettyServer: Could not create SaslServer: ", e); |
| } |
| } |
| |
| public boolean isComplete() { |
| return saslServer.isComplete(); |
| } |
| |
| public String getUserName() { |
| return saslServer.getAuthorizationID(); |
| } |
| |
| /** CallbackHandler for SASL DIGEST-MD5 mechanism */ |
| public static class SaslDigestCallbackHandler implements CallbackHandler { |
| |
| /** Used to authenticate the clients */ |
| private byte[] userPassword; |
| private String userName; |
| |
| public SaslDigestCallbackHandler(String topologyName, byte[] token) { |
| LOG.debug("SaslDigestCallback: Creating SaslDigestCallback handler with topology token: {}", topologyName); |
| this.userName = topologyName; |
| this.userPassword = token; |
| } |
| |
| @Override |
| public void handle(Callback[] callbacks) throws IOException, |
| UnsupportedCallbackException { |
| NameCallback nc = null; |
| PasswordCallback pc = null; |
| AuthorizeCallback ac = null; |
| |
| for (Callback callback : callbacks) { |
| if (callback instanceof AuthorizeCallback) { |
| ac = (AuthorizeCallback) callback; |
| } else if (callback instanceof NameCallback) { |
| nc = (NameCallback) callback; |
| } else if (callback instanceof PasswordCallback) { |
| pc = (PasswordCallback) callback; |
| } else if (callback instanceof RealmCallback) { |
| continue; // realm is ignored |
| } else { |
| throw new UnsupportedCallbackException(callback, |
| "handle: Unrecognized SASL DIGEST-MD5 Callback"); |
| } |
| } |
| |
| if (nc != null) { |
| LOG.debug("handle: SASL server DIGEST-MD5 callback: setting username for client: {}", |
| userName); |
| nc.setName(userName); |
| } |
| |
| if (pc != null) { |
| char[] password = SaslUtils.encodePassword(userPassword); |
| |
| LOG.debug("handle: SASL server DIGEST-MD5 callback: setting password for client: ", |
| userPassword); |
| |
| pc.setPassword(password); |
| } |
| if (ac != null) { |
| |
| String authid = ac.getAuthenticationID(); |
| String authzid = ac.getAuthorizationID(); |
| |
| if (authid.equals(authzid)) { |
| ac.setAuthorized(true); |
| } else { |
| ac.setAuthorized(false); |
| } |
| |
| if (ac.isAuthorized()) { |
| LOG.debug("handle: SASL server DIGEST-MD5 callback: setting canonicalized client ID: ", |
| userName); |
| ac.setAuthorizedID(authzid); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Used by SaslTokenMessage::processToken() to respond to server SASL |
| * tokens. |
| * |
| * @param token |
| * Server's SASL token |
| * @return token to send back to the server. |
| */ |
| public byte[] response(byte[] token) { |
| try { |
| LOG.debug("response: Responding to input token of length: {}", |
| token.length); |
| byte[] retval = saslServer.evaluateResponse(token); |
| LOG.debug("response: Response token length: {}", retval.length); |
| return retval; |
| } catch (SaslException e) { |
| LOG.error("response: Failed to evaluate client token of length: {} : {}", |
| token.length, e); |
| return null; |
| } |
| } |
| } |