package gnu.crypto.keyring; // -*- c-basic-offset: 3 -*-
// ---------------------------------------------------------------------------
// $Id: IKeyring.java,v 1.5 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.IOException;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
/**
* <p>The top-level interface to a <i>keyring:</i> a file that is used to
* store and protect public and private cryptographic keys.</p>
*
* <p>A <i>keyring</i> is modelled as a mapping of one <i>alias</i> to one or
* more <i>entries</i> (optionally of different types).</p>
*
* <p>See also the sub-interfaces {@link IPublicKeyring} and
* {@link IPrivateKeyring} for special types of <i>keyrings</i> --the difference
* being in the type of entries they contain.</p>
*
* @version $Revision: 1.5 $
*/
public interface IKeyring {
/**
* <p>Property name for the source of data to load the keyring from. The
* value mapped must be a {@link java.io.InputStream}.</p>
*/
public static final String KEYRING_DATA_IN = "gnu.crypto.keyring.data.in";
/**
* <p>Property name for the data sink to store the keyring to. The value
* mapped must be a {@link java.io.OutputStream}.</p>
*/
public static final String KEYRING_DATA_OUT = "gun.crypto.keyring.data.out";
/**
* <p>Property name for the keyring's top-level password, used to
* authenticate and/or transform the store itself. The mapped value must be a
* char array.</p>
*/
public static final String KEYRING_PASSWORD = "gnu.crypto.keyring.password";
/**
* <p>Loads a keyring into memory.</p>
*
* <p>What happens to the current contents of this keyring? are the new ones
* merged with the current ones or do they simply replace them?</p>
*
* @param attributes The attributes that designate the source where the store
* is to be loaded from. What happens
* @throws IllegalArgumentException If the attributes are inappropriate.
* @throws IOException If the keyring file cannot be read.
* @throws SecurityException If the given password is incorrect, or if the
* top-level authentication or decryption fails.
*/
void load(Map attributes) throws IOException;
/**
* <p>Stores the contents of this keyring to persistent storage as specified
* by the designated <code>attributes</code>.</p>
*
* @param attributes the attributes that define where the contents of this
* keyring will be stored.
* @throws IOException if an exception occurs during the process.
*/
void store(Map attributes) throws IOException;
/**
* <p>Resets this keyring, clearing all sensitive data. This method always
* suceeds.</p>
*/
void reset();
/**
* <p>Returns the number of entries in this keyring.</p>
*
* @return The number of current entries in this keyring.
*/
int size();
/**
* <p>Returns an {@link Enumeration} of all aliases (instances of
* {@link String}) in this keyring.</p>
*
* @return The enumeration of {@link String}s each representing an
* <i>alias</i> found in this keyring.
*/
Enumeration aliases();
/**
* Tests whether or not this keyring contains the given alias.
*
* @param alias The alias to check.
* @return true if this keyring contains the alias.
*/
boolean containsAlias(String alias);
/**
* <p>Returns a {@link List} of entries (instances of {@link Entry}) for the
* given <code>alias</code>, or <code>null</code> if there no such entry
* exists.</p>
*
* @param alias The alias of the entry(ies) to return.
* @return A list of all entries (instances of {@link Entry} that have the
* given <code>alias</code>, or <code>null</code> if no one {@link Entry} can
* be found with the designated <code>alias</code>.
*/
List get(String alias);
/**
* <p>Adds a designated {@link Entry} to this keyring.</p>
*
* <p>What happens if there is already an entry with the same alias?</p>
*
* @param entry The entry to put in this keyring.
*/
void add(Entry entry);
/**
* <p>Removes an entry with the designated <code>alias</code> from this
* keyring. Does nothing if there was no such entry.</p>
*
* <p>What happens if there are more than one?</p>
*
* @param alias The alias of the entry to remove.
*/
void remove(String alias);
}