/*
 *  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.harmony.xnet.provider.jsse;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.AccessController;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;

import javax.net.ssl.ManagerFactoryParameters;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactorySpi;

/**
 * 
 * TrustManagerFactory service provider interface implementation.
 * 
 * @see javax.net.ssl.TrustManagerFactorySpi
 */
public class TrustManagerFactoryImpl extends TrustManagerFactorySpi {

    private KeyStore keyStore;

    /**
     * @see javax.net.ssl.TrustManagerFactorySpi#engineInit(KeyStore)
     */
    @Override
    public void engineInit(KeyStore ks) throws KeyStoreException {
        if (ks != null) {
            keyStore = ks;
        } else {
            // BEGIN android-added
            if (System.getProperty("javax.net.ssl.trustStore") == null) {
                String file = System.getProperty("java.home")
                    + java.io.File.separator + "etc" + java.io.File.separator
                    + "security" + java.io.File.separator
                    + "cacerts.bks";

                System.setProperty("javax.net.ssl.trustStore", file);
            }
            // END android-added
            keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            String keyStoreName = AccessController
                    .doPrivileged(new java.security.PrivilegedAction<String>() {
                        public String run() {
                            return System
                                    .getProperty("javax.net.ssl.trustStore");
                        }
                    });
            String keyStorePwd = null;
            if (keyStoreName == null || keyStoreName.equalsIgnoreCase("NONE")
                    || keyStoreName.length() == 0) {
                try {
                    keyStore.load(null, null);
                } catch (IOException e) {
                    throw new KeyStoreException(e);
                } catch (CertificateException e) {
                    throw new KeyStoreException(e);
                } catch (NoSuchAlgorithmException e) {
                    throw new KeyStoreException(e);
                }
            } else {
                keyStorePwd = AccessController
                        .doPrivileged(new java.security.PrivilegedAction<String>() {
                            public String run() {
                                return System
                                        .getProperty("javax.net.ssl.trustStorePassword");
                            }
                        });
                char[] pwd;
                if (keyStorePwd == null) {
                    pwd = new char[0];
                } else {
                    pwd = keyStorePwd.toCharArray();
                }
                try {
                    keyStore.load(new FileInputStream(new File(keyStoreName)), pwd);
                } catch (FileNotFoundException e) {
                    throw new KeyStoreException(e);
                } catch (IOException e) {
                    throw new KeyStoreException(e);
                } catch (CertificateException e) {
                    throw new KeyStoreException(e);
                } catch (NoSuchAlgorithmException e) {
                    throw new KeyStoreException(e);
                }
            }
        }

    }

    /**
     * @see javax.net.ssl#engineInit(ManagerFactoryParameters)
     */
    @Override
    public void engineInit(ManagerFactoryParameters spec)
            throws InvalidAlgorithmParameterException {
        throw new InvalidAlgorithmParameterException(
                "ManagerFactoryParameters not supported");
    }

    /**
     * @see javax.net.ssl#engineGetTrustManagers()
     */
    @Override
    public TrustManager[] engineGetTrustManagers() {
        if (keyStore == null) {
            throw new IllegalStateException(
                    "TrustManagerFactory is not initialized");
        }
        return new TrustManager[] { new TrustManagerImpl(keyStore) };
    }
}