/*
 **** BEGIN LICENSE BLOCK *****
 * Version: EPL 2.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/epl-v20.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2010 Charles Oliver Nutter <headius@headius.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.ext.digest;

import org.jruby.Ruby;
import org.jruby.runtime.load.Library;
import org.jruby.util.ByteList;

import java.io.IOException;

public class BubbleBabble implements Library {

    public void load(final Ruby runtime, boolean wrap) throws IOException {
        RubyDigest.createDigestBubbleBabble(runtime);
    }

    
Ported from OpenSSH (https://github.com/openssh/openssh-portable/blob/957fbceb0f3166e41b76fdb54075ab3b9cc84cba/sshkey.c#L942-L987)
OpenSSH License Notice
Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
Copyright (c) 2008 Alexander von Gernler.  All rights reserved.
Copyright (c) 2010,2011 Damien Miller.  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.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
/**
     * Ported from OpenSSH (https://github.com/openssh/openssh-portable/blob/957fbceb0f3166e41b76fdb54075ab3b9cc84cba/sshkey.c#L942-L987)
     *
     * OpenSSH License Notice
     *
     * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
     * Copyright (c) 2008 Alexander von Gernler.  All rights reserved.
     * Copyright (c) 2010,2011 Damien Miller.  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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
     */
    public static ByteList bubblebabble(byte[] message, int begin, int length) {
        char[] vowels = new char[]{'a', 'e', 'i', 'o', 'u', 'y'};
        char[] consonants = new char[]{'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
                'n', 'p', 'r', 's', 't', 'v', 'z', 'x'};

        long seed = 1;

        ByteList retval = new ByteList();

        int rounds = (length / 2) + 1;
        retval.append('x');
        for (int i = 0; i < rounds; i++) {
            int idx0, idx1, idx2, idx3, idx4;

            if ((i + 1 < rounds) || (length % 2 != 0)) {
                long b = message[begin + 2 * i] & 0xFF;
                idx0 = (int) ((((b >> 6) & 3) + seed) % 6) & 0xFFFFFFFF;
                idx1 = (int) (((b) >> 2) & 15) & 0xFFFFFFFF;
                idx2 = (int) (((b & 3) + (seed / 6)) % 6) & 0xFFFFFFFF;
                retval.append(vowels[idx0]);
                retval.append(consonants[idx1]);
                retval.append(vowels[idx2]);
                if ((i + 1) < rounds) {
                    long b2 = message[begin + (2 * i) + 1] & 0xFF;
                    idx3 = (int) ((b2 >> 4) & 15) & 0xFFFFFFFF;
                    idx4 = (int) ((b2) & 15) & 0xFFFFFFFF;
                    retval.append(consonants[idx3]);
                    retval.append('-');
                    retval.append(consonants[idx4]);
                    seed = ((seed * 5) +
                            ((b * 7) +
                                    b2)) % 36;
                }
            } else {
                idx0 = (int) (seed % 6) & 0xFFFFFFFF;
                idx1 = 16;
                idx2 = (int) (seed / 6) & 0xFFFFFFFF;
                retval.append(vowels[idx0]);
                retval.append(consonants[idx1]);
                retval.append(vowels[idx2]);
            }
        }
        retval.append('x');

        return retval;
    }
}