001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019package org.crsh.ssh.term;
020
021import org.apache.sshd.common.keyprovider.AbstractKeyPairProvider;
022import org.apache.sshd.common.util.SecurityUtils;
023import org.bouncycastle.openssl.PEMReader;
024import org.crsh.vfs.Resource;
025
026import java.io.ByteArrayInputStream;
027import java.io.InputStreamReader;
028import java.security.KeyPair;
029import java.util.ArrayList;
030import java.util.List;
031import java.util.logging.Level;
032import java.util.logging.Logger;
033
034public class URLKeyPairProvider extends AbstractKeyPairProvider {
035
036  /** . */
037  private static final Logger log = Logger.getLogger(URLKeyPairProvider.class.getName());
038
039  /** . */
040  private final Resource key;
041
042  public URLKeyPairProvider(Resource key) {
043    this.key = key;
044  }
045
046  @Override
047  public Iterable<java.security.KeyPair> loadKeys() {
048    if (!SecurityUtils.isBouncyCastleRegistered()) {
049      throw new IllegalStateException("BouncyCastle must be registered as a JCE provider");
050    }
051    List<KeyPair> keys = new ArrayList<KeyPair>();
052    if (key != null) {
053      try {
054        PEMReader r = new PEMReader(new InputStreamReader(new ByteArrayInputStream(key.getContent())));
055        try {
056          Object o = r.readObject();
057          if (o instanceof KeyPair) {
058            keys.add((KeyPair) o);
059          }
060        } finally {
061          r.close();
062        }
063      } catch (Exception e) {
064        log.log(Level.INFO, "Unable to read key " + key + ": " + key, e);
065      }
066    }
067    return keys;
068  }
069}