001 /* 002 * Copyright (C) 2003-2009 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.PEMReader; 024 import org.slf4j.Logger; 025 import org.slf4j.LoggerFactory; 026 027 import java.io.InputStream; 028 import java.io.InputStreamReader; 029 import java.net.URL; 030 import java.security.KeyPair; 031 import java.util.ArrayList; 032 import java.util.List; 033 034 /** 035 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 036 */ 037 public class URLKeyPairProvider extends AbstractKeyPairProvider { 038 039 /** . */ 040 private static final Logger LOG = LoggerFactory.getLogger(URLKeyPairProvider.class); 041 042 /** . */ 043 private final URL url; 044 045 public URLKeyPairProvider(URL url) { 046 this.url = url; 047 } 048 049 @Override 050 protected KeyPair[] loadKeys() { 051 if (!SecurityUtils.isBouncyCastleRegistered()) { 052 throw new IllegalStateException("BouncyCastle must be registered as a JCE provider"); 053 } 054 List<KeyPair> keys = new ArrayList<KeyPair>(); 055 if (url != null) { 056 try { 057 InputStream in = url.openStream(); 058 PEMReader r = new PEMReader(new InputStreamReader(in)); 059 try { 060 Object o = r.readObject(); 061 if (o instanceof KeyPair) { 062 keys.add((KeyPair) o); 063 } 064 } finally { 065 r.close(); 066 } 067 } catch (Exception e) { 068 LOG.info("Unable to read key {}: {}", url, e); 069 } 070 } 071 return keys.toArray(new KeyPair[keys.size()]); 072 } 073 }