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jeremybenn |
/* PublicKeyEntry.java --
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Copyright (C) 2003, 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.crypto.keyring;
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import gnu.java.security.key.IKeyPairCodec;
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import gnu.java.security.key.KeyPairCodecFactory;
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import gnu.java.security.key.dss.DSSPublicKey;
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import gnu.java.security.key.rsa.GnuRSAPublicKey;
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import gnu.javax.crypto.key.dh.GnuDHPublicKey;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.security.KeyFactory;
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import java.security.PublicKey;
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import java.security.spec.X509EncodedKeySpec;
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import java.util.Date;
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public final class PublicKeyEntry
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extends PrimitiveEntry
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{
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public static final int TYPE = 6;
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private PublicKey key;
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public PublicKeyEntry(PublicKey key, Date creationDate, Properties properties)
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{
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super(TYPE, creationDate, properties);
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if (key == null)
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throw new IllegalArgumentException("no key specified");
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this.key = key;
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}
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private PublicKeyEntry()
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{
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super(TYPE);
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}
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public static PublicKeyEntry decode(DataInputStream in) throws IOException
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{
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PublicKeyEntry entry = new PublicKeyEntry();
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entry.defaultDecode(in);
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String type = entry.properties.get("type");
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if (type == null)
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throw new MalformedKeyringException("no key type");
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if (type.equalsIgnoreCase("RAW-DSS"))
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{
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dss");
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entry.key = coder.decodePublicKey(entry.payload);
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}
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else if (type.equalsIgnoreCase("RAW-RSA"))
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{
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("rsa");
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entry.key = coder.decodePublicKey(entry.payload);
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}
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else if (type.equalsIgnoreCase("RAW-DH"))
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{
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dh");
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entry.key = coder.decodePublicKey(entry.payload);
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}
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else if (type.equalsIgnoreCase("X.509"))
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{
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try
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{
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KeyFactory kf = KeyFactory.getInstance("RSA");
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entry.key = kf.generatePublic(new X509EncodedKeySpec(entry.payload));
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}
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catch (Exception x)
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{
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}
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if (entry.key == null)
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{
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try
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{
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KeyFactory kf = KeyFactory.getInstance("DSA");
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entry.key = kf.generatePublic(new X509EncodedKeySpec(entry.payload));
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}
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catch (Exception x)
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{
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}
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if (entry.key == null)
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throw new MalformedKeyringException("could not decode X.509 key");
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}
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}
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else
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throw new MalformedKeyringException("unsupported public key type: " + type);
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return entry;
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}
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/**
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* Returns the public key.
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*
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* @return The public key.
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*/
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public PublicKey getKey()
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{
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return key;
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}
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protected void encodePayload() throws IOException
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{
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if (key instanceof DSSPublicKey)
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{
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properties.put("type", "RAW-DSS");
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dss");
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payload = coder.encodePublicKey(key);
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}
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else if (key instanceof GnuRSAPublicKey)
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{
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properties.put("type", "RAW-RSA");
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("rsa");
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payload = coder.encodePublicKey(key);
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}
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else if (key instanceof GnuDHPublicKey)
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{
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properties.put("type", "RAW-DH");
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IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dh");
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payload = coder.encodePublicKey(key);
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}
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else if (key.getFormat() != null && key.getFormat().equals("X.509"))
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{
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properties.put("type", "X.509");
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payload = key.getEncoded();
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}
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else
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throw new IllegalArgumentException("cannot encode public key");
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}
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}
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