be.ac.ua.comp.scarletnebula.core.KeyManager.java Source code

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Here is the source code for be.ac.ua.comp.scarletnebula.core.KeyManager.java

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/*
 * Copyright (C) 2011  Ives van der Flaas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package be.ac.ua.comp.scarletnebula.core;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import be.ac.ua.comp.scarletnebula.misc.Utils;

public class KeyManager {
    private static Log log = LogFactory.getLog(KeyManager.class);

    /**
     * Takes a keyname, an actual key and a provider name (for which this key
     * works) and then stores the key on disk.
     * 
     * @param providerName
     * @param keyname
     * @param keystring
     */
    static void addKey(final String providerName, final String keyname, final String keystring) {
        if (assureDirectory(providerName) == null) {
            return;
        }

        // Now store the key to file
        BufferedWriter out;
        try {
            out = new BufferedWriter(new FileWriter(getKeyFilename(providerName, keyname)));
            out.write(keystring);
            out.close();
        } catch (final IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * Creates a new key from the contents of the key in a string.
     * 
     * @param providerName
     *            Name of the provider
     * @param keyname
     *            Name of the key
     * @param key
     *            Contents of the key
     */
    public static void addKey(final String providerName, final String keyname, final File key) {

        if (assureDirectory(providerName) == null) {
            return;
        }

        try {
            Utils.copyFile(key, new File(getKeyFilename(providerName, keyname)));
        } catch (final FileNotFoundException e) {
            e.printStackTrace();
        } catch (final IOException e) {
            e.printStackTrace();
        }
    }

    static public Collection<String> getKeyNames(final String providerName) {
        final File dirFile = assureDirectory(providerName);

        final Collection<String> keynames = new ArrayList<String>();

        for (final String keyfile : dirFile.list()) {
            keynames.add(keyfile.replaceAll("\\.key$", ""));
        }
        return keynames;
    }

    static private File assureDirectory(final String providerName) {
        final String dir = getKeyPath(providerName);
        final File dirFile = new File(dir);

        // Check if the key dir already exists
        if (!dirFile.exists()) {
            // If it does not exist, create the directory
            if (!dirFile.mkdirs()) {
                log.error("Cannot make key directory!");
            }
        }

        return dirFile;
    }

    static String getKeyPath(final String providerName) {
        return "keys/" + providerName + "/";
    }

    static String getKeyFilename(final String providerName, final String keyname) {
        final String filename = getKeyPath(providerName) + keyname + ".key";

        return filename;
    }

    public static void deleteKey(final String providerName, final String keyname) {
        final File keyFile = new File(getKeyFilename(providerName, keyname));

        if (keyFile.exists()) {
            keyFile.delete();
        }
    }
}