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     */
019    package org.crsh.ssh.term;
020    
021    import org.apache.sshd.common.keyprovider.AbstractKeyPairProvider;
022    import org.apache.sshd.common.util.SecurityUtils;
023    import org.bouncycastle.openssl.PEMKeyPair;
024    import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
025    import org.crsh.ssh.util.KeyPairUtils;
026    import org.crsh.vfs.Resource;
027    
028    import java.io.ByteArrayInputStream;
029    import java.io.InputStreamReader;
030    import java.security.KeyPair;
031    import java.util.ArrayList;
032    import java.util.List;
033    import java.util.logging.Level;
034    import java.util.logging.Logger;
035    
036    public 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    }