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.PEMKeyPair;
024import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
025import org.crsh.ssh.util.KeyPairUtils;
026import org.crsh.vfs.Resource;
027
028import java.io.ByteArrayInputStream;
029import java.io.InputStreamReader;
030import java.security.KeyPair;
031import java.util.ArrayList;
032import java.util.List;
033import java.util.logging.Level;
034import java.util.logging.Logger;
035
036public class URLKeyPairProvider extends AbstractKeyPairProvider {
037
038  /** . */
039  private static final Logger log = Logger.getLogger(URLKeyPairProvider.class.getName());
040
041  /** . */
042  private final Resource key;
043
044  public URLKeyPairProvider(Resource key) {
045    this.key = key;
046  }
047
048  @Override
049  public Iterable<java.security.KeyPair> loadKeys() {
050    if (!SecurityUtils.isBouncyCastleRegistered()) {
051      throw new IllegalStateException("BouncyCastle must be registered as a JCE provider");
052    }
053    List<KeyPair> keys = new ArrayList<KeyPair>();
054    if (key != null) {
055      try {
056          Object o = KeyPairUtils.readKey(new InputStreamReader(new ByteArrayInputStream(key.getContent())));
057          if (o instanceof KeyPair) {
058            keys.add((KeyPair) o);
059          } else if(o instanceof PEMKeyPair) {
060            JcaPEMKeyConverter converter = new JcaPEMKeyConverter();
061            keys.add(converter.getKeyPair((PEMKeyPair)o));
062          }
063      } catch (Exception e) {
064        log.log(Level.INFO, "Unable to read key " + key + ": " + key, e);
065      }
066    }
067    return keys;
068  }
069}