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EntropySource.java

package gnu.crypto.prng;  // -*- mode: java; c-basic-offset: 3 -*-

// ---------------------------------------------------------------------------
// $Id: EntropySource.java,v 1.2 2005/10/06 04:24:17 rsdio Exp $
//
// Copyright (C) 2004 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
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// ---------------------------------------------------------------------------

/**
 * A generic interface for adding random bytes to an entropy pool.
 */
00049 public interface EntropySource {

   /**
    * Returns the estimated quality of this source. This value should be
    * between 0 and 100 (the running quality is computed as a percentage,
    * 100 percent being perfect-quality).
    *
    * @return The quality.
    */
   double quality();

   /**
    * Returns a new buffer with the next random bytes to add.
    *
    * @return The next random bytes.
    */
   byte[] nextBytes();
}

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