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.util;
020    
021    import org.bouncycastle.openssl.PEMParser;
022    import org.bouncycastle.util.io.pem.PemReader;
023    import java.io.Reader;
024    
025    /** @author <a href="mailto:tuyennt@exoplatform.com">Tuyen Nguyen The</a> */
026    public 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    }