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/*
* Copyright (C) 2010 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 android.net;
import android.annotation.UnsupportedAppUsage;
import android.content.Context;
import android.util.Log;
import com.android.org.conscrypt.ClientSessionContext;
import com.android.org.conscrypt.FileClientSessionCache;
import com.android.org.conscrypt.SSLClientSessionCache;
import java.io.File;
import java.io.IOException;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSessionContext;
/**
* File-based cache of established SSL sessions. When re-establishing a
* connection to the same server, using an SSL session cache can save some time,
* power, and bandwidth by skipping directly to an encrypted stream.
* This is a persistent cache which can span executions of the application.
*
* @see SSLCertificateSocketFactory
*/
public final class SSLSessionCache {
private static final String TAG = "SSLSessionCache";
@UnsupportedAppUsage
/* package */ final SSLClientSessionCache mSessionCache;
/**
* Installs a {@link SSLSessionCache} on a {@link SSLContext}. The cache will
* be used on all socket factories created by this context (including factories
* created before this call).
*
* @param cache the cache instance to install, or {@code null} to uninstall any
* existing cache.
* @param context the context to install it on.
* @throws IllegalArgumentException if the context does not support a session
* cache.
*
* @hide candidate for public API
*/
public static void install(SSLSessionCache cache, SSLContext context) {
SSLSessionContext clientContext = context.getClientSessionContext();
if (clientContext instanceof ClientSessionContext) {
((ClientSessionContext) clientContext).setPersistentCache(
cache == null ? null : cache.mSessionCache);
} else {
throw new IllegalArgumentException("Incompatible SSLContext: " + context);
}
}
/**
* NOTE: This needs to be Object (and not SSLClientSessionCache) because apps
* that build directly against the framework (and not the SDK) might not declare
* a dependency on conscrypt. Javac will then has fail while resolving constructors.
*
* @hide For unit test use only
*/
public SSLSessionCache(Object cache) {
mSessionCache = (SSLClientSessionCache) cache;
}
/**
* Create a session cache using the specified directory.
* Individual session entries will be files within the directory.
* Multiple instances for the same directory share data internally.
*
* @param dir to store session files in (created if necessary)
* @throws IOException if the cache can't be opened
*/
public SSLSessionCache(File dir) throws IOException {
mSessionCache = FileClientSessionCache.usingDirectory(dir);
}
/**
* Create a session cache at the default location for this app.
* Multiple instances share data internally.
*
* @param context for the application
*/
public SSLSessionCache(Context context) {
File dir = context.getDir("sslcache", Context.MODE_PRIVATE);
SSLClientSessionCache cache = null;
try {
cache = FileClientSessionCache.usingDirectory(dir);
} catch (IOException e) {
Log.w(TAG, "Unable to create SSL session cache in " + dir, e);
}
mSessionCache = cache;
}
}
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