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.util;
020
021import org.bouncycastle.openssl.PEMParser;
022import org.bouncycastle.util.io.pem.PemReader;
023import java.io.Reader;
024
025/** @author <a href="mailto:tuyennt@exoplatform.com">Tuyen Nguyen The</a> */
026public class KeyPairUtils {
027    public static Object readKey(Reader reader) throws Exception {
028        try {
029            PEMParser pemParser = new PEMParser(reader);
030            try {
031                return pemParser.readObject();
032            } finally {
033                pemParser.close();
034            }
035        } catch (NoClassDefFoundError e) {
036            //. We use reflection here to keep compatible with old library of bouncycastle
037            Class<?> pemReaderClass = Class.forName("org.bouncycastle.openssl.PEMReader");
038            PemReader r = (PemReader)pemReaderClass.getConstructor(Reader.class).newInstance(reader);
039            try {
040                return pemReaderClass.getMethod("readObject").invoke(r);
041            } finally {
042                r.close();
043            }
044        }
045    }
046}