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/*
 * 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 org.apache.qpid.jms.transports;

import java.net.Socket;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLEngine;
import javax.net.ssl.X509ExtendedKeyManager;

/**
 * An X509ExtendedKeyManager wrapper which always chooses and only
 * returns the given alias, and defers retrieval to the delegate
 * key manager.
 */
public class X509AliasKeyManager extends X509ExtendedKeyManager {
    private X509ExtendedKeyManager delegate;
    private String alias;

    public X509AliasKeyManager(String alias, X509ExtendedKeyManager delegate) throws IllegalArgumentException {
        if (alias == null) {
            throw new IllegalArgumentException("The given key alias must not be null.");
        }

        this.alias = alias;
        this.delegate = delegate;
    }

    @Override
    public String chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) {
        return alias;
    }

    @Override
    public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
        return alias;
    }

    @Override
    public X509Certificate[] getCertificateChain(String alias) {
        return delegate.getCertificateChain(alias);
    }

    @Override
    public String[] getClientAliases(String keyType, Principal[] issuers) {
        return new String[] { alias };
    }

    @Override
    public PrivateKey getPrivateKey(String alias) {
        return delegate.getPrivateKey(alias);
    }

    @Override
    public String[] getServerAliases(String keyType, Principal[] issuers) {
        return new String[] { alias };
    }

    @Override
    public String chooseEngineClientAlias(String[] keyType, Principal[] issuers, SSLEngine engine) {
        return alias;
    }

    @Override
    public String chooseEngineServerAlias(String keyType, Principal[] issuers, SSLEngine engine) {
        return alias;
    }
}