/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/*
Copyright (c) 2012 ymnk, JCraft,Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright 
     notice, this list of conditions and the following disclaimer in 
     the documentation and/or other materials provided with the distribution.

  3. The names of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.jcraft.jsch;

import java.util.Vector;

public interface IdentityRepository {
  public static final int UNAVAILABLE=0;
  public static final int NOTRUNNING=1;
  public static final int RUNNING=2;
  public String getName();
  public int getStatus();
  public Vector getIdentities();
  public boolean add(byte[] identity);
  public boolean remove(byte[] blob);
  public void removeAll();

  /**
   * JSch will accept ciphered keys, but some implementations of
   * IdentityRepository can not.  For example, IdentityRepository for
   * ssh-agent and pageant only accept plain keys.  The following class has
   * been introduced to cache ciphered keys for them, and pass them
   * whenever they are de-ciphered.
   */
  static class Wrapper implements IdentityRepository {
    private IdentityRepository ir;
    private Vector cache = new Vector();
    private boolean keep_in_cache = false;
    Wrapper(IdentityRepository ir){
      this(ir, false);
    }
    Wrapper(IdentityRepository ir, boolean keep_in_cache){
      this.ir = ir;
      this.keep_in_cache = keep_in_cache;
    }
    public String getName() {
      return ir.getName();
    }
    public int getStatus() {
      return ir.getStatus();
    }
    public boolean add(byte[] identity) {
      return ir.add(identity);
    }
    public boolean remove(byte[] blob) {
      return ir.remove(blob);
    }
    public void removeAll() {
      cache.removeAllElements();
      ir.removeAll();
    }
    public Vector getIdentities() {
      Vector result = new Vector();
      for(int i = 0; i< cache.size(); i++){
        Identity identity = (Identity)(cache.elementAt(i));
        result.add(identity);
      }
      Vector tmp = ir.getIdentities();
      for(int i = 0; i< tmp.size(); i++){
        result.add(tmp.elementAt(i));
      }
      return result;
    }
    void add(Identity identity) {
      if(!keep_in_cache && 
         !identity.isEncrypted() && (identity instanceof IdentityFile)) {
        try {
          ir.add(((IdentityFile)identity).getKeyPair().forSSHAgent());
        }
        catch(JSchException e){
          // an exception will not be thrown.
        }
      }
      else
        cache.addElement(identity);
    }
    void check() {
      if(cache.size() > 0){
        Object[] identities = cache.toArray();
        for(int i = 0; i < identities.length; i++){
          Identity identity = (Identity)(identities[i]);
          cache.removeElement(identity);
          add(identity);
        }
      }
    }
  }
}
