Early Roguelike Collection: arogue5/xcrypt.c annotate

annotate arogue5/xcrypt.c @ 155:1af259ac4ed2

arogue7, xrogue: fix save/restore of alchemy jugs. state.c now saves the fuse that refills alchemy jugs, using the method of numbering objects previously applied to Advanced Rogue 5. Alchemy jugs that are empty when the game is saved will continue to function after it is restored. Savefile compatibility should not be affected.

author	John "Elwin" Edwards
date	Fri, 29 May 2015 17:34:04 -0400
parents	0ed67132cf10
children	56e748983fa8

rev	line source
63 0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	1 /*
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	2 * FreeSec: libcrypt
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	3 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	4 * Copyright (C) 1994 David Burren
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	5 * All rights reserved.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	6 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	7 * Redistribution and use in source and binary forms, with or without
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	8 * modification, are permitted provided that the following conditions
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	9 * are met:
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	10 * 1. Redistributions of source code must retain the above copyright
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	11 * notice, this list of conditions and the following disclaimer.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	12 * 2. Redistributions in binary form must reproduce the above copyright
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	13 * notice, this list of conditions and the following disclaimer in the
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	14 * documentation and/or other materials provided with the distribution.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	15 * 3. Neither the name(s) of the author(s) nor the names of other contributors
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	16 * may be used to endorse or promote products derived from this software
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	17 * without specific prior written permission.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	18 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	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) elwin parents: diff changeset	23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	29 * SUCH DAMAGE.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	30 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	31 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	32 * This is an original implementation of the DES and the crypt(3) interfaces
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	33 * by David Burren <davidb@werj.com.au>.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	34 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	35 * An excellent reference on the underlying algorithm (and related
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	36 * algorithms) is:
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	37 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	38 * B. Schneier, Applied Cryptography: protocols, algorithms,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	39 * and source code in C, John Wiley & Sons, 1994.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	40 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	41 * Note that in that book's description of DES the lookups for the initial,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	42 * pbox, and final permutations are inverted (this has been brought to the
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	43 * attention of the author). A list of errata for this book has been
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	44 * posted to the sci.crypt newsgroup by the author and is available for FTP.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	45 *
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	46 * NOTE:
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	47 * This file has a static version of des_setkey() so that crypt.o exports
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	48 * only the crypt() interface. This is required to make binaries linked
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	49 * against crypt.o exportable or re-exportable from the USA.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	50 */
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	51
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	52 #include <sys/types.h>
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	53 #include <string.h>
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	54
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	55 #ifdef DEBUG
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	56 # include <stdio.h>
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	57 #endif
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	58 #define _PASSWORD_EFMT1 '_'
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	59
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	60 static unsigned char IP[64] = {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	61 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	62 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	63 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	64 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	65 };
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	66
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	67 static unsigned char inv_key_perm[64];
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	68 static unsigned char key_perm[56] = {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	69 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	70 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	71 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	72 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	73 };
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	74
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	75 static unsigned char key_shifts[16] = {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	76 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	77 };
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	78
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	79 static unsigned char inv_comp_perm[56];
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	80 static unsigned char comp_perm[48] = {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	81 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	82 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	83 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	84 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	85 };
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	86
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	87 /*
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	88 * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	89 */
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	90
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	91 static unsigned char u_sbox[8][64];
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	92 static unsigned char sbox[8][64] = {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	93 {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	94 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	95 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	96 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	97 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	98 },
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	99 {
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	100 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	101 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
0ed67132cf10 Import Advanced Rogue 5.8 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	102 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,

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annotate arogue5/xcrypt.c @ 155:1af259ac4ed2