package gnu.crypto.keyring; // -*- c-basic-offset: 3 -*-
// ---------------------------------------------------------------------------
// $Id: BaseKeyring.java,v 1.4 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 java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import gnu.crypto.Registry;
public abstract class BaseKeyring implements IKeyring {
// Fields.
// ------------------------------------------------------------------------
private static final IllegalStateException NOT_LOADED
= new IllegalStateException("keyring not loaded");
/**
* The top-level keyring data.
*/
protected PasswordAuthenticatedEntry keyring;
protected CompressedEntry keyring2;
// Constructors.
// ------------------------------------------------------------------------
public BaseKeyring() {
}
// Instance methods.
// ------------------------------------------------------------------------
public void load(Map attributes) throws IOException {
InputStream in = (InputStream) attributes.get(KEYRING_DATA_IN);
if (in == null) {
throw new IllegalArgumentException("no input stream");
}
char[] password = (char[]) attributes.get(KEYRING_PASSWORD);
if (password == null) {
password = new char[0];
}
if (in.read() != Registry.GKR_MAGIC[0] ||
in.read() != Registry.GKR_MAGIC[1] ||
in.read() != Registry.GKR_MAGIC[2] ||
in.read() != Registry.GKR_MAGIC[3]) {
throw new MalformedKeyringException("magic");
}
load(in, password);
List l = keyring.getEntries();
if (l.size() == 1 && (l.get(0) instanceof CompressedEntry)) {
keyring2 = (CompressedEntry) l.get(0);
}
}
public void store(Map attributes) throws IOException {
OutputStream out = (OutputStream) attributes.get(KEYRING_DATA_OUT);
if (out == null) {
throw new IllegalArgumentException("no output stream");
}
char[] password = (char[]) attributes.get(KEYRING_PASSWORD);
if (password == null) {
password = new char[0];
}
if (keyring == null) {
throw new IllegalStateException("empty keyring");
}
out.write(Registry.GKR_MAGIC);
store(out, password);
}
public void reset() {
keyring = null;
}
public int size() {
if (keyring == null) {
throw NOT_LOADED;
}
return ((StringTokenizer) aliases()).countTokens();
}
public Enumeration aliases() {
if (keyring == null) {
throw NOT_LOADED;
}
return new StringTokenizer(keyring.getAliasList(), ";");
}
public boolean containsAlias(String alias) {
if (keyring == null) {
throw new IllegalStateException("keyring not loaded");
}
return keyring.containsAlias(alias);
}
public List get(String alias) {
if (keyring == null) {
throw new IllegalStateException("keyring not loaded");
}
return keyring.get(alias);
}
public void add(Entry entry) {
if (keyring == null) {
throw new IllegalStateException("keyring not loaded");
}
if (keyring2 != null)
keyring2.add(entry);
else
keyring.add(entry);
}
public void remove(String alias) {
if (keyring == null) {
throw new IllegalStateException("keyring not loaded");
}
keyring.remove(alias);
}
protected String fixAlias(String alias) {
return alias.replace(';', '_');
}
protected abstract void load(InputStream in, char[] password) throws IOException;
protected abstract void store(OutputStream out, char[] password) throws IOException;
}