src/plugins/certmanager/src/com/motorolamobility/studio/android/certmanager/core/BackwardKeystoreManager.java

/*
 * Copyright (C) 2012 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 com.motorolamobility.studio.android.certmanager.core;

import java.io.File;
import java.util.List;

import org.eclipse.equinox.security.storage.ISecurePreferences;
import org.eclipse.equinox.security.storage.SecurePreferencesFactory;
import org.eclipse.equinox.security.storage.StorageException;

import com.motorola.studio.android.common.log.StudioLogger;
import com.motorola.studio.android.common.utilities.EclipseUtils;
import com.motorolamobility.studio.android.certmanager.i18n.CertificateManagerNLS;
import com.motorolamobility.studio.android.certmanager.ui.model.IKeyStoreEntry;
import com.motorolamobility.studio.android.certmanager.ui.model.KeyStoreNode;
import com.motorolamobility.studio.android.certmanager.ui.model.SigningAndKeysModelManager;

/**
 * Manages old MOTODEV keystore available at <user_home>\motodevstudio\tools\motodev.keystore  
 * (to keep backward compatibility)
 */
public class BackwardKeystoreManager
{
    /**
     * MOTODEV Studio directory.
     */
    private static final String MOTODEV_TOOLS_PATH = File.separator
            + "motodevstudio" + File.separator + "tools"; //$NON-NLS-1$ //$NON-NLS-2$

    /**
     * Path to user home directory.
     */
    private static final String USER_HOME_PATH = System.getProperty("user.home"); //$NON-NLS-1$

    /**
     * Full path where the files will be.
     */
    private static final String TOOLS_FULL_PATH = USER_HOME_PATH + MOTODEV_TOOLS_PATH;

    private static final String KS_FILENAME_NEW = TOOLS_FULL_PATH + File.separatorChar
            + "motodev.keystore"; //$NON-NLS-1$

    /**
     * The constant contains the keysotre type.
     */
    private static final String KS_TYPE = "JCEKS"; //$NON-NLS-1$

    /**
     * The constant contains the keystore password.
     */
    private static final String KS_DEFAULT_PASSWD = "passwd"; //$NON-NLS-1$

    /**
     * The constant contains the keystore password node on secure storage.
     */
    private static final String KS_PASSWD_NODE = "com.motorola.studio.platform.tools.sign.core"; //$NON-NLS-1$

    /**
     * The constant contains the keystore password attribute on secure storage.
     */
    private static final String KS_PASSWD_ATTRIBUTE = "kspasswd"; //$NON-NLS-1$

    /*
     * Removes old keystore password from Eclipse secure preferences (old format)
     * @return the stored password (before removal), 
     * {@link SigningCoreConstants#KS_DEFAULT_PASSWD} if found node {@link SigningCoreConstants#KS_PASSWD_NODE} but {@link SigningCoreConstants#KS_PASSWD_ATTRIBUTE} does not exist, 
     * null if node {@link SigningCoreConstants#KS_PASSWD_NODE} not found  
     */
    private String removeOldKeystorePassword()
    {
        String oldPassword = KS_DEFAULT_PASSWD;
        ISecurePreferences preferences = SecurePreferencesFactory.getDefault();
        ISecurePreferences node = null;
        try
        {
            if (preferences.nodeExists(KS_PASSWD_NODE))
            {
                //old format node exists = try to get from attribute
                node = preferences.node(KS_PASSWD_NODE);
                try
                {
                    oldPassword = node.get(KS_PASSWD_ATTRIBUTE, KS_DEFAULT_PASSWD);
                }
                catch (StorageException e)
                {
                    oldPassword = KS_DEFAULT_PASSWD;
                }
                node.remove(KS_PASSWD_ATTRIBUTE);
                preferences.remove(KS_PASSWD_NODE);
                node.flush();
            }
            else
            {
                //node already removed => password is in the new format
                oldPassword = null;
            }
        }
        catch (Exception e)
        {
            StudioLogger.error(BackwardKeystoreManager.class, e.getMessage(), e);
        }
        return oldPassword;
    }

    /**
     * Maps old keystore if the <user_home>\motodevstudio\tools\motodev.keystore file exists.
     */
    public void mapOldKeystore()
    {
        File motodevKeystoreFile = new File(KS_FILENAME_NEW);
        if (motodevKeystoreFile.exists())
        {
            //we found backward (old default MOTODEV keystore) => import it
            KeyStoreNode keyStoreNode = new KeyStoreNode(motodevKeystoreFile, KS_TYPE);

            try
            {
                SigningAndKeysModelManager.getInstance().mapKeyStore(keyStoreNode);

                //remove old password from keystore
                String oldPassword = removeOldKeystorePassword();

                if (oldPassword != null)
                {
                    //oldPassword was in old format => add password for keystore in the new format  
                    PasswordProvider passwordProvider =
                            new PasswordProvider(keyStoreNode.getFile());
                    passwordProvider.saveKeyStorePassword(oldPassword);

                    //for each child key (save the same password as the keystore to maintain backward compatibility)
                    List<IKeyStoreEntry> iKeyStoreEntries = keyStoreNode.getEntries(oldPassword);
                    if (iKeyStoreEntries != null)
                    {
                        for (IKeyStoreEntry keyStoreEntry : iKeyStoreEntries)
                        {
                            passwordProvider.savePassword(keyStoreEntry.getAlias(), oldPassword);
                        }
                    }
                }
            }
            catch (Exception e)
            {
                //error
                EclipseUtils.showErrorDialog(CertificateManagerNLS.bind(
                        CertificateManagerNLS.KeystoreManagerView_ErrorImportingBackwardKeystore,
                        motodevKeystoreFile), e.getMessage());
            }
        }
    }
}