package gnu.crypto.keyring; // -*- c-basic-offset: 3 -*-
// ---------------------------------------------------------------------------
// $Id: PrivateKeyEntry.java,v 1.7 2005/10/06 04:24:16 rsdio Exp $
//
// Copyright (C) 2003 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// GNU Crypto is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; see the file COPYING. If not, write to the
//
// Free Software Foundation Inc.,
// 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301
// USA
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give
// you permission to link this library with independent modules to
// produce an executable, regardless of the license terms of these
// independent modules, and to copy and distribute the resulting
// executable under terms of your choice, provided that you also meet,
// for each linked independent module, the terms and conditions of the
// license of that module. An independent module is a module which is
// not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the
// library, but you are not obligated to do so. If you do not wish to
// do so, delete this exception statement from your version.
//
// ---------------------------------------------------------------------------
import gnu.crypto.key.GnuSecretKey;
import gnu.crypto.key.IKeyPairCodec;
import gnu.crypto.key.KeyPairCodecFactory;
import gnu.crypto.key.dh.GnuDHPrivateKey;
import gnu.crypto.key.dss.DSSPrivateKey;
import gnu.crypto.key.rsa.GnuRSAPrivateKey;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Date;
/**
* <p>An immutable class representing a private or secret key entry.</p>
*
* @version $Revision: 1.7 $
*/
public final class PrivateKeyEntry extends PrimitiveEntry {
// Constants and variables
// -------------------------------------------------------------------------
public static final int TYPE = 7;
/** The key. */
private Key key;
// Constructor(s)
// -------------------------------------------------------------------------
/**
* <p>Creates a new key entry.</p>
*
* @param key The key.
* @param creationDate The entry creation date.
* @param properties The entry properties.
* @throws IllegalArgumentException If any parameter is null.
*/
public PrivateKeyEntry(Key key, Date creationDate, Properties properties) {
super(TYPE, creationDate, properties);
if (key == null) {
throw new IllegalArgumentException("no private key");
}
if (!(key instanceof PrivateKey) && !(key instanceof GnuSecretKey)) {
throw new IllegalArgumentException("not a private or secret key");
}
this.key = key;
}
private PrivateKeyEntry() {
super (TYPE);
}
// Class methods
// -------------------------------------------------------------------------
public static PrivateKeyEntry decode(DataInputStream in) throws IOException {
PrivateKeyEntry entry = new PrivateKeyEntry();
entry.defaultDecode(in);
String type = entry.properties.get("type");
if (type == null) {
throw new MalformedKeyringException("no key type");
}
if (type.equalsIgnoreCase("RAW-DSS")) {
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dss");
entry.key = coder.decodePrivateKey(entry.payload);
} else if (type.equalsIgnoreCase("RAW-RSA")) {
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("rsa");
entry.key = coder.decodePrivateKey(entry.payload);
} else if (type.equalsIgnoreCase("RAW-DH")) {
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dh");
entry.key = coder.decodePrivateKey(entry.payload);
} else if (type.equalsIgnoreCase("RAW")) {
entry.key = new GnuSecretKey(entry.payload, null);
} else if (type.equalsIgnoreCase("PKCS8")) {
try {
KeyFactory kf = KeyFactory.getInstance("RSA");
entry.key = kf.generatePrivate(new PKCS8EncodedKeySpec(entry.payload));
} catch (Exception x) {
}
if (entry.key == null) {
try {
KeyFactory kf = KeyFactory.getInstance("DSA");
entry.key = kf.generatePrivate(new PKCS8EncodedKeySpec(entry.payload));
} catch (Exception x) {
}
if (entry.key == null) {
throw new MalformedKeyringException("could not decode PKCS#8 key");
}
}
} else {
throw new MalformedKeyringException("unsupported key type " + type);
}
return entry;
}
// Instance methods
// -------------------------------------------------------------------------
/**
* <p>Returns this entry's key.</p>
*
* @return The key.
*/
public Key getKey() {
return key;
}
protected void encodePayload() throws IOException {
String format = key.getFormat();
if (key instanceof DSSPrivateKey) {
properties.put("type", "RAW-DSS");
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dss");
payload = coder.encodePrivateKey((PrivateKey) key);
} else if (key instanceof GnuRSAPrivateKey) {
properties.put("type", "RAW-RSA");
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("rsa");
payload = coder.encodePrivateKey((PrivateKey) key);
} else if (key instanceof GnuDHPrivateKey) {
properties.put("type", "RAW-DH");
IKeyPairCodec coder = KeyPairCodecFactory.getInstance("dh");
payload = coder.encodePrivateKey((PrivateKey) key);
} else if (key instanceof GnuSecretKey) {
properties.put("type", "RAW");
payload = key.getEncoded();
} else if (format != null && format.equals("PKCS#8")) {
properties.put("type", "PKCS8");
payload = key.getEncoded();
} else {
throw new IllegalArgumentException("unsupported private key");
}
}
}