| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // 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 com.google.gerrit.sshd; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| |
| import org.apache.sshd.common.Session; |
| import org.apache.sshd.common.SessionListener; |
| import org.apache.sshd.server.PublickeyAuthenticator; |
| import org.apache.sshd.server.session.ServerSession; |
| |
| import java.security.PublicKey; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| @Singleton |
| public class CachingPublicKeyAuthenticator implements PublickeyAuthenticator, |
| SessionListener { |
| |
| private final PublickeyAuthenticator authenticator; |
| private final Map<ServerSession, Map<PublicKey, Boolean>> sessionCache; |
| |
| @Inject |
| public CachingPublicKeyAuthenticator(DatabasePubKeyAuth authenticator) { |
| this.authenticator = authenticator; |
| this.sessionCache = new ConcurrentHashMap<>(); |
| } |
| |
| @Override |
| public boolean authenticate(String username, PublicKey key, |
| ServerSession session) { |
| Map<PublicKey, Boolean> m = sessionCache.get(session); |
| if (m == null) { |
| m = new HashMap<>(); |
| sessionCache.put(session, m); |
| session.addListener(this); |
| } |
| if (m.containsKey(key)) { |
| return m.get(key); |
| } |
| boolean r = authenticator.authenticate(username, key, session); |
| m.put(key, r); |
| return r; |
| } |
| |
| @Override |
| public void sessionCreated(Session session) { |
| } |
| |
| @Override |
| public void sessionEvent(Session sesssion, Event event) { |
| } |
| |
| @Override |
| public void sessionClosed(Session session) { |
| sessionCache.remove(session); |
| } |
| } |