| /* CompressedEntry.java -- |
| Copyright (C) 2003, 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath 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 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath 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 GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, 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. */ |
| |
| |
| package gnu.javax.crypto.keyring; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.zip.DeflaterOutputStream; |
| import java.util.zip.InflaterInputStream; |
| |
| public class CompressedEntry |
| extends EnvelopeEntry |
| { |
| public static final int TYPE = 4; |
| |
| public CompressedEntry(Properties properties) |
| { |
| super(TYPE, properties); |
| this.properties.put("algorithm", "DEFLATE"); |
| } |
| |
| private CompressedEntry() |
| { |
| this(new Properties()); |
| } |
| |
| public static CompressedEntry decode(DataInputStream in) throws IOException |
| { |
| CompressedEntry entry = new CompressedEntry(); |
| entry.properties.decode(in); |
| String alg = entry.properties.get("algorithm"); |
| if (alg == null) |
| throw new MalformedKeyringException("no compression algorithm"); |
| if (! alg.equalsIgnoreCase("DEFLATE")) |
| throw new MalformedKeyringException("unsupported compression algorithm: " |
| + alg); |
| int len = in.readInt(); |
| MeteredInputStream min = new MeteredInputStream(in, len); |
| InflaterInputStream infin = new InflaterInputStream(min); |
| DataInputStream in2 = new DataInputStream(infin); |
| entry.decodeEnvelope(in2); |
| return entry; |
| } |
| |
| protected void encodePayload() throws IOException |
| { |
| ByteArrayOutputStream buf = new ByteArrayOutputStream(1024); |
| DeflaterOutputStream dout = new DeflaterOutputStream(buf); |
| DataOutputStream out2 = new DataOutputStream(dout); |
| for (Iterator it = entries.iterator(); it.hasNext();) |
| ((Entry) it.next()).encode(out2); |
| dout.finish(); |
| payload = buf.toByteArray(); |
| } |
| } |