1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.conscrypt; 18 19 import javax.net.ssl.SSLContext; 20 21 /** 22 * Caches server sessions. Indexes by session ID. Users typically look up 23 * sessions using the ID provided by an SSL client. 24 */ 25 @Internal 26 public final class ServerSessionContext extends AbstractSessionContext { 27 private SSLServerSessionCache persistentCache; 28 ServerSessionContext()29 ServerSessionContext() { 30 super(100); 31 32 // TODO make sure SSL_CTX does not automaticaly clear sessions we want it to cache 33 // SSL_CTX_set_session_cache_mode(sslCtxNativePointer, SSL_SESS_CACHE_NO_AUTO_CLEAR); 34 35 // TODO remove SSL_CTX session cache limit so we can manage it 36 // SSL_CTX_sess_set_cache_size(sslCtxNativePointer, 0); 37 38 // TODO override trimToSize and removeEldestEntry to use 39 // SSL_CTX_sessions to remove from native cache 40 41 // Set a trivial session id context. OpenSSL uses this to make 42 // sure you don't reuse sessions externalized with i2d_SSL_SESSION 43 // between apps. However our sessions are either in memory or 44 // exported to a app's SSLServerSessionCache. 45 NativeCrypto.SSL_CTX_set_session_id_context(sslCtxNativePointer, this, new byte[] { ' ' }); 46 } 47 48 /** 49 * Applications should not use this method. Instead use {@link 50 * Conscrypt#setServerSessionCache(SSLContext, SSLServerSessionCache)}. 51 */ setPersistentCache(SSLServerSessionCache persistentCache)52 public void setPersistentCache(SSLServerSessionCache persistentCache) { 53 this.persistentCache = persistentCache; 54 } 55 56 @Override getSessionFromPersistentCache(byte[] sessionId)57 NativeSslSession getSessionFromPersistentCache(byte[] sessionId) { 58 if (persistentCache != null) { 59 byte[] data = persistentCache.getSessionData(sessionId); 60 if (data != null) { 61 NativeSslSession session = NativeSslSession.newInstance(this, data, null, -1); 62 if (session != null && session.isValid()) { 63 cacheSession(session); 64 return session; 65 } 66 } 67 } 68 69 return null; 70 } 71 72 @Override onBeforeAddSession(NativeSslSession session)73 void onBeforeAddSession(NativeSslSession session) { 74 // TODO: Do this in background thread. 75 if (persistentCache != null) { 76 byte[] data = session.toBytes(); 77 if (data != null) { 78 persistentCache.putSessionData(session.toSSLSession(), data); 79 } 80 } 81 } 82 83 @Override onBeforeRemoveSession(NativeSslSession session)84 void onBeforeRemoveSession(NativeSslSession session) { 85 // Do nothing. 86 } 87 } 88