/*************************************************************************
 * Copyright 2009-2014 Eucalyptus Systems, Inc.
 *
 * This program 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; version 3 of the License.
 *
 * This program 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.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 *
 * This file may incorporate work covered under the following copyright
 * and permission notice:
 *
 *   Software License Agreement (BSD License)
 *
 *   Copyright (c) 2008, Regents of the University of California
 *   All rights reserved.
 *
 *   Redistribution and use of this software in source and binary forms,
 *   with or without modification, are permitted provided that the
 *   following conditions are met:
 *
 *     Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *     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.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS 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 THE
 *   COPYRIGHT OWNER OR CONTRIBUTORS 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. USERS OF THIS SOFTWARE ACKNOWLEDGE
 *   THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
 *   COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
 *   AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
 *   IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
 *   SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
 *   WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
 *   REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
 *   IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
 *   NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
 ************************************************************************/

package com.eucalyptus.bootstrap;

import com.eucalyptus.component.id.Eucalyptus;
import com.eucalyptus.crypto.Digest;

import com.eucalyptus.crypto.Signatures;
import com.eucalyptus.util.Exceptions;
import com.google.common.base.Joiner;

public class SystemIds {

  public static String databasePassword( ) {
    try {
      return Digest.SHA256.digestHex( Signatures.SHA256withRSA.signBinary( Eucalyptus.class, "eucalyptus".getBytes() ) );
    } catch ( Exception e ) {
      throw Exceptions.toUndeclared( "Error getting database password", e );
    }
  }
  
  public static String tunnelPassword( ) {
    return Signatures.SHA256withRSA.trySign( Eucalyptus.class, "vtunpass".getBytes( ) );
  }

  public static String securityTokenPassword( ) {
    return Signatures.SHA256withRSA.trySign( Eucalyptus.class, "tokens-service".getBytes( ) );
  }

  public static String createCloudUniqueName( String subName ) {
    return Joiner.on( "." ).join(
        Eucalyptus.class.getSimpleName( ),
        BillOfMaterials.getVersion( ),
        subName,
        Signatures.SHA256withRSA.trySign( Eucalyptus.class, subName.getBytes( ) ) );
  }
  
  public static String createShortCloudUniqueName( String subName ) {
    try {
      return Joiner.on( "." ).join(
          Eucalyptus.class.getSimpleName( ),
          BillOfMaterials.getVersion( ),
          subName,
          Digest.SHA256.digestHex( Signatures.SHA256withRSA.signBinary( Eucalyptus.class, subName.getBytes( ) ) ) );
    } catch ( Exception e ) {
      throw Exceptions.toUndeclared( "Error getting short unique name for " + subName, e );
    }
  }
  
  public static String cloudName( ) {
    return createCloudUniqueName( "cloud" );
  }
  
  public static String cacheName( ) {
    return createShortCloudUniqueName( "cache" );
  }
  
  public static String membershipGroupName( ) {
    return createShortCloudUniqueName( "membership" );
  }
  
  public static String membershipUdpMcastTransportName( ) {
    return createShortCloudUniqueName( "membership-udp-mcast-transport" );
  }
}