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annotate arogue5/xcrypt.c @ 88:07c4d4883ef2

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rogue3: begin porting to autoconf. Rogue V3 can now be built with './configure && make'. This is preliminary: 'make install' does not work yet.
author John "Elwin" Edwards
date Sat, 24 Aug 2013 13:36:13 -0700
parents 0ed67132cf10
children 56e748983fa8
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0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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1 /*
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2 * FreeSec: libcrypt
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3 *
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4 * Copyright (C) 1994 David Burren
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5 * All rights reserved.
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6 *
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7 * Redistribution and use in source and binary forms, with or without
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8 * modification, are permitted provided that the following conditions
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9 * are met:
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10 * 1. Redistributions of source code must retain the above copyright
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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11 * notice, this list of conditions and the following disclaimer.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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12 * 2. Redistributions in binary form must reproduce the above copyright
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 * 3. Neither the name(s) of the author(s) nor the names of other contributors
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16 * may be used to endorse or promote products derived from this software
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17 * without specific prior written permission.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND
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20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490)
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24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 * SUCH DAMAGE.
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30 *
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31 *
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32 * This is an original implementation of the DES and the crypt(3) interfaces
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33 * by David Burren <davidb@werj.com.au>.
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34 *
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35 * An excellent reference on the underlying algorithm (and related
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36 * algorithms) is:
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37 *
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38 * B. Schneier, Applied Cryptography: protocols, algorithms,
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39 * and source code in C, John Wiley & Sons, 1994.
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40 *
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41 * Note that in that book's description of DES the lookups for the initial,
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42 * pbox, and final permutations are inverted (this has been brought to the
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43 * attention of the author). A list of errata for this book has been
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44 * posted to the sci.crypt newsgroup by the author and is available for FTP.
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45 *
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46 * NOTE:
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