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/*
* Copyright 2019 The Netty Project
*
* The Netty Project 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 io.netty.handler.ssl.util;
import io.netty.util.concurrent.FastThreadLocal;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.SuppressJava6Requirement;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.Provider;
import javax.net.ssl.ManagerFactoryParameters;
import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.KeyManagerFactorySpi;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.net.ssl.X509KeyManager;
/**
* Helps to implement a custom {@link KeyManagerFactory}.
*/
public abstract class SimpleKeyManagerFactory extends KeyManagerFactory {
private static final Provider PROVIDER = new Provider("", 0.0, "") {
private static final long serialVersionUID = -2680540247105807895L;
};
/**
* {@link SimpleKeyManagerFactorySpi} must have a reference to {@link SimpleKeyManagerFactory}
* to delegate its callbacks back to {@link SimpleKeyManagerFactory}. However, it is impossible to do so,
* because {@link KeyManagerFactory} requires {@link KeyManagerFactorySpi} at construction time and
* does not provide a way to access it later.
*
* To work around this issue, we use an ugly hack which uses a {@link FastThreadLocal }.
*/
private static final FastThreadLocal CURRENT_SPI =
new FastThreadLocal() {
@Override
protected SimpleKeyManagerFactorySpi initialValue() {
return new SimpleKeyManagerFactorySpi();
}
};
/**
* Creates a new instance.
*/
protected SimpleKeyManagerFactory() {
this(StringUtil.EMPTY_STRING);
}
/**
* Creates a new instance.
*
* @param name the name of this {@link KeyManagerFactory}
*/
protected SimpleKeyManagerFactory(String name) {
super(CURRENT_SPI.get(), PROVIDER, ObjectUtil.checkNotNull(name, "name"));
CURRENT_SPI.get().init(this);
CURRENT_SPI.remove();
}
/**
* Initializes this factory with a source of certificate authorities and related key material.
*
* @see KeyManagerFactorySpi#engineInit(KeyStore, char[])
*/
protected abstract void engineInit(KeyStore keyStore, char[] var2) throws Exception;
/**
* Initializes this factory with a source of provider-specific key material.
*
* @see KeyManagerFactorySpi#engineInit(ManagerFactoryParameters)
*/
protected abstract void engineInit(ManagerFactoryParameters managerFactoryParameters) throws Exception;
/**
* Returns one key manager for each type of key material.
*
* @see KeyManagerFactorySpi#engineGetKeyManagers()
*/
protected abstract KeyManager[] engineGetKeyManagers();
private static final class SimpleKeyManagerFactorySpi extends KeyManagerFactorySpi {
private SimpleKeyManagerFactory parent;
private volatile KeyManager[] keyManagers;
void init(SimpleKeyManagerFactory parent) {
this.parent = parent;
}
@Override
protected void engineInit(KeyStore keyStore, char[] pwd) throws KeyStoreException {
try {
parent.engineInit(keyStore, pwd);
} catch (KeyStoreException e) {
throw e;
} catch (Exception e) {
throw new KeyStoreException(e);
}
}
@Override
protected void engineInit(
ManagerFactoryParameters managerFactoryParameters) throws InvalidAlgorithmParameterException {
try {
parent.engineInit(managerFactoryParameters);
} catch (InvalidAlgorithmParameterException e) {
throw e;
} catch (Exception e) {
throw new InvalidAlgorithmParameterException(e);
}
}
@Override
protected KeyManager[] engineGetKeyManagers() {
KeyManager[] keyManagers = this.keyManagers;
if (keyManagers == null) {
keyManagers = parent.engineGetKeyManagers();
if (PlatformDependent.javaVersion() >= 7) {
wrapIfNeeded(keyManagers);
}
this.keyManagers = keyManagers;
}
return keyManagers.clone();
}
@SuppressJava6Requirement(reason = "Usage guarded by java version check")
private static void wrapIfNeeded(KeyManager[] keyManagers) {
for (int i = 0; i < keyManagers.length; i++) {
final KeyManager tm = keyManagers[i];
if (tm instanceof X509KeyManager && !(tm instanceof X509ExtendedKeyManager)) {
keyManagers[i] = new X509KeyManagerWrapper((X509KeyManager) tm);
}
}
}
}
}