Early Roguelike Collection: srogue/xcrypt.c annotate

annotate srogue/xcrypt.c @ 119:458df24e973d

srogue: use functions from mdport.c. Shell escape, passwd entries, terminal settings, and most signal handling is now done with the more portable md_* functions.

author	John "Elwin" Edwards
date	Wed, 30 Apr 2014 14:46:30 -0700
parents	2128c7dc8a40
children	e6c8652473fe

rev	line source
36 2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	1 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	2 * FreeSec: libcrypt
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	3 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	4 * Copyright (C) 1994 David Burren
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	5 * All rights reserved.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	6 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	7 * Redistribution and use in source and binary forms, with or without
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	8 * modification, are permitted provided that the following conditions
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	9 * are met:
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	10 * 1. Redistributions of source code must retain the above copyright
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	11 * notice, this list of conditions and the following disclaimer.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	12 * 2. Redistributions in binary form must reproduce the above copyright
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	13 * notice, this list of conditions and the following disclaimer in the
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	14 * documentation and/or other materials provided with the distribution.
2128c7dc8a40 Import Super-Rogue 9.0 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
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	16 * may be used to endorse or promote products derived from this software
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	17 * without specific prior written permission.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	18 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2128c7dc8a40 Import Super-Rogue 9.0 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
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	29 * SUCH DAMAGE.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	30 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	31 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	32 * This is an original implementation of the DES and the crypt(3) interfaces
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	33 * by David Burren <davidb@werj.com.au>.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	34 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	35 * An excellent reference on the underlying algorithm (and related
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	36 * algorithms) is:
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	37 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	38 * B. Schneier, Applied Cryptography: protocols, algorithms,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	39 * and source code in C, John Wiley & Sons, 1994.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	40 *
2128c7dc8a40 Import Super-Rogue 9.0 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,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	42 * pbox, and final permutations are inverted (this has been brought to the
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	43 * attention of the author). A list of errata for this book has been
2128c7dc8a40 Import Super-Rogue 9.0 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.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	45 *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	46 * NOTE:
2128c7dc8a40 Import Super-Rogue 9.0 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
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	48 * only the crypt() interface. This is required to make binaries linked
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	49 * against crypt.o exportable or re-exportable from the USA.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	50 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	51
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	52 #include <sys/types.h>
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	53 #include <sys/param.h>
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	54 #include <string.h>
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	55
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	56 #ifdef DEBUG
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	57 # include <stdio.h>
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	58 #endif
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	59 #define _PASSWORD_EFMT1 '_'
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	60
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	61 static unsigned char IP[64] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	62 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	63 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	64 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	65 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	66 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	67
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	68 static unsigned char inv_key_perm[64];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	69 static unsigned char key_perm[56] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	70 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	71 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	72 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	73 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	74 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	75
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	76 static unsigned char key_shifts[16] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	77 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	78 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	79
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	80 static unsigned char inv_comp_perm[56];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	81 static unsigned char comp_perm[48] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	82 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	83 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	84 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	85 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	86 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	87
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	88 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	89 * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	90 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	91
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	92 static unsigned char u_sbox[8][64];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	93 static unsigned char sbox[8][64] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	94 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	95 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	96 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	97 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	98 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	99 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	100 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	101 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	102 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	103 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	104 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	105 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	106 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	107 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	108 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	109 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	110 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	111 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	112 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	113 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	114 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	115 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	116 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	117 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	118 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	119 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	120 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	121 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	122 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	123 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	124 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	125 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	126 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	127 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	128 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	129 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	130 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	131 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	132 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	133 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	134 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	135 },
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	136 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	137 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	138 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	139 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	140 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	141 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	142 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	143
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	144 static unsigned char un_pbox[32];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	145 static unsigned char pbox[32] = {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	146 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	147 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	148 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	149
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	150 static unsigned int bits32[32] =
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	151 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	152 0x80000000, 0x40000000, 0x20000000, 0x10000000,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	153 0x08000000, 0x04000000, 0x02000000, 0x01000000,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	154 0x00800000, 0x00400000, 0x00200000, 0x00100000,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	155 0x00080000, 0x00040000, 0x00020000, 0x00010000,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	156 0x00008000, 0x00004000, 0x00002000, 0x00001000,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	157 0x00000800, 0x00000400, 0x00000200, 0x00000100,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	158 0x00000080, 0x00000040, 0x00000020, 0x00000010,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	159 0x00000008, 0x00000004, 0x00000002, 0x00000001
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	160 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	161
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	162 static unsigned char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	163
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	164 static unsigned int saltbits;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	165 static int old_salt;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	166 static unsigned int bits28, bits24;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	167 static unsigned char init_perm[64], final_perm[64];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	168 static unsigned int en_keysl[16], en_keysr[16];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	169 static unsigned int de_keysl[16], de_keysr[16];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	170 static int des_initialised = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	171 static unsigned char m_sbox[4][4096];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	172 static unsigned int psbox[4][256];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	173 static unsigned int ip_maskl[8][256], ip_maskr[8][256];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	174 static unsigned int fp_maskl[8][256], fp_maskr[8][256];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	175 static unsigned int key_perm_maskl[8][128], key_perm_maskr[8][128];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	176 static unsigned int comp_maskl[8][128], comp_maskr[8][128];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	177 static unsigned int old_rawkey0, old_rawkey1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	178
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	179 static unsigned char ascii64[] =
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	180 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	181 /* 0000000000111111111122222222223333333333444444444455555555556666 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	182 /* 0123456789012345678901234567890123456789012345678901234567890123 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	183
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	184 static __inline int
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	185 ascii_to_bin(ch)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	186 char ch;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	187 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	188 if (ch > 'z')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	189 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	190 if (ch >= 'a')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	191 return(ch - 'a' + 38);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	192 if (ch > 'Z')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	193 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	194 if (ch >= 'A')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	195 return(ch - 'A' + 12);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	196 if (ch > '9')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	197 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	198 if (ch >= '.')
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	199 return(ch - '.');
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	200 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	201 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	202
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	203 static void
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	204 des_init()
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	205 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	206 int i, j, b, k, inbit, obit;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	207 unsigned int p, il, ir, fl, *fr;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	208
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	209 old_rawkey0 = old_rawkey1 = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	210 saltbits = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	211 old_salt = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	212 bits24 = (bits28 = bits32 + 4) + 4;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	213
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	214 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	215 * Invert the S-boxes, reordering the input bits.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	216 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	217 for (i = 0; i < 8; i++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	218 for (j = 0; j < 64; j++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	219 b = (j & 0x20) \| ((j & 1) << 4) \| ((j >> 1) & 0xf);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	220 u_sbox[i][j] = sbox[i][b];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	221 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	222
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	223 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	224 * Convert the inverted S-boxes into 4 arrays of 8 bits.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	225 * Each will handle 12 bits of the S-box input.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	226 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	227 for (b = 0; b < 4; b++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	228 for (i = 0; i < 64; i++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	229 for (j = 0; j < 64; j++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	230 m_sbox[b][(i << 6) \| j] =
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	231 (u_sbox[(b << 1)][i] << 4) \|
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	232 u_sbox[(b << 1) + 1][j];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	233
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	234 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	235 * Set up the initial & final permutations into a useful form, and
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	236 * initialise the inverted key permutation.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	237 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	238 for (i = 0; i < 64; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	239 init_perm[final_perm[i] = IP[i] - 1] = i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	240 inv_key_perm[i] = 255;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	241 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	242
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	243 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	244 * Invert the key permutation and initialise the inverted key
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	245 * compression permutation.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	246 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	247 for (i = 0; i < 56; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	248 inv_key_perm[key_perm[i] - 1] = i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	249 inv_comp_perm[i] = 255;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	250 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	251
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	252 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	253 * Invert the key compression permutation.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	254 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	255 for (i = 0; i < 48; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	256 inv_comp_perm[comp_perm[i] - 1] = i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	257 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	258
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	259 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	260 * Set up the OR-mask arrays for the initial and final permutations,
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	261 * and for the key initial and compression permutations.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	262 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	263 for (k = 0; k < 8; k++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	264 for (i = 0; i < 256; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	265 *(il = &ip_maskl[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	266 *(ir = &ip_maskr[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	267 *(fl = &fp_maskl[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	268 *(fr = &fp_maskr[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	269 for (j = 0; j < 8; j++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	270 inbit = 8 * k + j;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	271 if (i & bits8[j]) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	272 if ((obit = init_perm[inbit]) < 32)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	273 *il \|= bits32[obit];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	274 else
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	275 *ir \|= bits32[obit-32];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	276 if ((obit = final_perm[inbit]) < 32)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	277 *fl \|= bits32[obit];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	278 else
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	279 *fr \|= bits32[obit - 32];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	280 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	281 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	282 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	283 for (i = 0; i < 128; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	284 *(il = &key_perm_maskl[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	285 *(ir = &key_perm_maskr[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	286 for (j = 0; j < 7; j++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	287 inbit = 8 * k + j;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	288 if (i & bits8[j + 1]) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	289 if ((obit = inv_key_perm[inbit]) == 255)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	290 continue;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	291 if (obit < 28)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	292 *il \|= bits28[obit];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	293 else
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	294 *ir \|= bits28[obit - 28];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	295 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	296 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	297 *(il = &comp_maskl[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	298 *(ir = &comp_maskr[k][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	299 for (j = 0; j < 7; j++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	300 inbit = 7 * k + j;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	301 if (i & bits8[j + 1]) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	302 if ((obit=inv_comp_perm[inbit]) == 255)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	303 continue;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	304 if (obit < 24)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	305 *il \|= bits24[obit];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	306 else
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	307 *ir \|= bits24[obit - 24];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	308 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	309 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	310 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	311 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	312
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	313 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	314 * Invert the P-box permutation, and convert into OR-masks for
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	315 * handling the output of the S-box arrays setup above.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	316 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	317 for (i = 0; i < 32; i++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	318 un_pbox[pbox[i] - 1] = i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	319
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	320 for (b = 0; b < 4; b++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	321 for (i = 0; i < 256; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	322 *(p = &psbox[b][i]) = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	323 for (j = 0; j < 8; j++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	324 if (i & bits8[j])
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	325 p \|= bits32[un_pbox[8 b + j]];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	326 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	327 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	328
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	329 des_initialised = 1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	330 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	331
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	332 static void
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	333 setup_salt(salt)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	334 int salt;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	335 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	336 unsigned int obit, saltbit;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	337 int i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	338
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	339 if (salt == old_salt)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	340 return;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	341 old_salt = salt;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	342
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	343 saltbits = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	344 saltbit = 1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	345 obit = 0x800000;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	346 for (i = 0; i < 24; i++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	347 if (salt & saltbit)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	348 saltbits \|= obit;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	349 saltbit <<= 1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	350 obit >>= 1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	351 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	352 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	353
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	354 static int
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	355 des_setkey(key)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	356 const char *key;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	357 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	358 unsigned int k0, k1, rawkey0, rawkey1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	359 int shifts, round;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	360
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	361 if (!des_initialised)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	362 des_init();
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	363
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	364 rawkey0 = ntohl((unsigned int ) key);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	365 rawkey1 = ntohl((unsigned int ) (key + 4));
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	366
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	367 if ((rawkey0 \| rawkey1)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	368 && rawkey0 == old_rawkey0
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	369 && rawkey1 == old_rawkey1) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	370 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	371 * Already setup for this key.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	372 * This optimisation fails on a zero key (which is weak and
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	373 * has bad parity anyway) in order to simplify the starting
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	374 * conditions.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	375 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	376 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	377 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	378 old_rawkey0 = rawkey0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	379 old_rawkey1 = rawkey1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	380
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	381 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	382 * Do key permutation and split into two 28-bit subkeys.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	383 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	384 k0 = key_perm_maskl[0][rawkey0 >> 25]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	385 \| key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	386 \| key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	387 \| key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	388 \| key_perm_maskl[4][rawkey1 >> 25]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	389 \| key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	390 \| key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	391 \| key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	392 k1 = key_perm_maskr[0][rawkey0 >> 25]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	393 \| key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	394 \| key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	395 \| key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	396 \| key_perm_maskr[4][rawkey1 >> 25]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	397 \| key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	398 \| key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	399 \| key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	400 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	401 * Rotate subkeys and do compression permutation.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	402 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	403 shifts = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	404 for (round = 0; round < 16; round++) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	405 unsigned int t0, t1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	406
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	407 shifts += key_shifts[round];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	408
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	409 t0 = (k0 << shifts) \| (k0 >> (28 - shifts));
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	410 t1 = (k1 << shifts) \| (k1 >> (28 - shifts));
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	411
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	412 de_keysl[15 - round] =
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	413 en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	414 \| comp_maskl[1][(t0 >> 14) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	415 \| comp_maskl[2][(t0 >> 7) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	416 \| comp_maskl[3][t0 & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	417 \| comp_maskl[4][(t1 >> 21) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	418 \| comp_maskl[5][(t1 >> 14) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	419 \| comp_maskl[6][(t1 >> 7) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	420 \| comp_maskl[7][t1 & 0x7f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	421
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	422 de_keysr[15 - round] =
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	423 en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	424 \| comp_maskr[1][(t0 >> 14) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	425 \| comp_maskr[2][(t0 >> 7) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	426 \| comp_maskr[3][t0 & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	427 \| comp_maskr[4][(t1 >> 21) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	428 \| comp_maskr[5][(t1 >> 14) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	429 \| comp_maskr[6][(t1 >> 7) & 0x7f]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	430 \| comp_maskr[7][t1 & 0x7f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	431 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	432 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	433 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	434
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	435 static int
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	436 do_des(l_in, r_in, l_out, r_out, count)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	437 unsigned int l_in, r_in, l_out, r_out;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	438 int count;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	439 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	440 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	441 * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	442 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	443 unsigned int l, r, kl, kr, kl1, kr1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	444 unsigned int f, r48l, r48r;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	445 int round;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	446
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	447 if (count == 0) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	448 return(1);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	449 } else if (count > 0) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	450 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	451 * Encrypting
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	452 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	453 kl1 = en_keysl;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	454 kr1 = en_keysr;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	455 } else {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	456 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	457 * Decrypting
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	458 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	459 count = -count;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	460 kl1 = de_keysl;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	461 kr1 = de_keysr;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	462 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	463
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	464 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	465 * Do initial permutation (IP).
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	466 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	467 l = ip_maskl[0][l_in >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	468 \| ip_maskl[1][(l_in >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	469 \| ip_maskl[2][(l_in >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	470 \| ip_maskl[3][l_in & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	471 \| ip_maskl[4][r_in >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	472 \| ip_maskl[5][(r_in >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	473 \| ip_maskl[6][(r_in >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	474 \| ip_maskl[7][r_in & 0xff];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	475 r = ip_maskr[0][l_in >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	476 \| ip_maskr[1][(l_in >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	477 \| ip_maskr[2][(l_in >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	478 \| ip_maskr[3][l_in & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	479 \| ip_maskr[4][r_in >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	480 \| ip_maskr[5][(r_in >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	481 \| ip_maskr[6][(r_in >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	482 \| ip_maskr[7][r_in & 0xff];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	483
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	484 while (count--) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	485 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	486 * Do each round.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	487 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	488 kl = kl1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	489 kr = kr1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	490 round = 16;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	491 while (round--) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	492 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	493 * Expand R to 48 bits (simulate the E-box).
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	494 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	495 r48l = ((r & 0x00000001) << 23)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	496 \| ((r & 0xf8000000) >> 9)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	497 \| ((r & 0x1f800000) >> 11)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	498 \| ((r & 0x01f80000) >> 13)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	499 \| ((r & 0x001f8000) >> 15);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	500
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	501 r48r = ((r & 0x0001f800) << 7)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	502 \| ((r & 0x00001f80) << 5)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	503 \| ((r & 0x000001f8) << 3)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	504 \| ((r & 0x0000001f) << 1)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	505 \| ((r & 0x80000000) >> 31);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	506 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	507 * Do salting for crypt() and friends, and
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	508 * XOR with the permuted key.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	509 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	510 f = (r48l ^ r48r) & saltbits;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	511 r48l ^= f ^ *kl++;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	512 r48r ^= f ^ *kr++;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	513 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	514 * Do sbox lookups (which shrink it back to 32 bits)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	515 * and do the pbox permutation at the same time.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	516 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	517 f = psbox[0][m_sbox[0][r48l >> 12]]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	518 \| psbox[1][m_sbox[1][r48l & 0xfff]]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	519 \| psbox[2][m_sbox[2][r48r >> 12]]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	520 \| psbox[3][m_sbox[3][r48r & 0xfff]];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	521 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	522 * Now that we've permuted things, complete f().
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	523 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	524 f ^= l;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	525 l = r;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	526 r = f;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	527 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	528 r = l;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	529 l = f;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	530 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	531 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	532 * Do final permutation (inverse of IP).
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	533 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	534 *l_out = fp_maskl[0][l >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	535 \| fp_maskl[1][(l >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	536 \| fp_maskl[2][(l >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	537 \| fp_maskl[3][l & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	538 \| fp_maskl[4][r >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	539 \| fp_maskl[5][(r >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	540 \| fp_maskl[6][(r >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	541 \| fp_maskl[7][r & 0xff];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	542 *r_out = fp_maskr[0][l >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	543 \| fp_maskr[1][(l >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	544 \| fp_maskr[2][(l >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	545 \| fp_maskr[3][l & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	546 \| fp_maskr[4][r >> 24]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	547 \| fp_maskr[5][(r >> 16) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	548 \| fp_maskr[6][(r >> 8) & 0xff]
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	549 \| fp_maskr[7][r & 0xff];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	550 return(0);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	551 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	552
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	553 static int
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	554 des_cipher(in, out, salt, count)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	555 const char *in;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	556 char *out;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	557 int salt;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	558 int count;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	559 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	560 unsigned int l_out, r_out, rawl, rawr;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	561 unsigned int x[2];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	562 int retval;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	563
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	564 if (!des_initialised)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	565 des_init();
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	566
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	567 setup_salt(salt);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	568
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	569 memcpy(x, in, sizeof x);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	570 rawl = ntohl(x[0]);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	571 rawr = ntohl(x[1]);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	572 retval = do_des(rawl, rawr, &l_out, &r_out, count);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	573
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	574 x[0] = htonl(l_out);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	575 x[1] = htonl(r_out);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	576 memcpy(out, x, sizeof x);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	577 return(retval);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	578 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	579
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	580 char *
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	581 xcrypt(key, setting)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	582 const char *key;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	583 const char *setting;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	584 {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	585 int i;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	586 unsigned int count, salt, l, r0, r1, keybuf[2];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	587 unsigned char p, q;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	588 static unsigned char output[21];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	589
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	590 if (!des_initialised)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	591 des_init();
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	592
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	593 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	594 * Copy the key, shifting each character up by one bit
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	595 * and padding with zeros.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	596 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	597 q = (unsigned char *) keybuf;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	598 while ((q - (unsigned char *) keybuf) < sizeof(keybuf)) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	599 if ((q++ = key << 1))
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	600 key++;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	601 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	602 if (des_setkey((unsigned char *) keybuf))
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	603 return(NULL);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	604
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	605 if (*setting == _PASSWORD_EFMT1) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	606 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	607 * "new"-style:
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	608 * setting - underscore, 4 bytes of count, 4 bytes of salt
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	609 * key - unlimited characters
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	610 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	611 for (i = 1, count = 0; i < 5; i++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	612 count \|= ascii_to_bin(setting[i]) << (i - 1) * 6;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	613
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	614 for (i = 5, salt = 0; i < 9; i++)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	615 salt \|= ascii_to_bin(setting[i]) << (i - 5) * 6;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	616
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	617 while (*key) {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	618 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	619 * Encrypt the key with itself.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	620 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	621 if (des_cipher((unsigned char)keybuf, (unsigned char)keybuf, 0, 1))
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	622 return(NULL);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	623 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	624 * And XOR with the next 8 characters of the key.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	625 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	626 q = (unsigned char *) keybuf;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	627 while (((q - (unsigned char *) keybuf) < sizeof(keybuf)) &&
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	628 *key)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	629 q++ ^= key++ << 1;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	630
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	631 if (des_setkey((unsigned char *) keybuf))
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	632 return(NULL);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	633 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	634 strncpy((char *)output, setting, 9);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	635
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	636 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	637 * Double check that we weren't given a short setting.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	638 * If we were, the above code will probably have created
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	639 * wierd values for count and salt, but we don't really care.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	640 * Just make sure the output string doesn't have an extra
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	641 * NUL in it.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	642 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	643 output[9] = '\0';
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	644 p = output + strlen((const char *)output);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	645 } else {
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	646 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	647 * "old"-style:
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	648 * setting - 2 bytes of salt
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	649 * key - up to 8 characters
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	650 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	651 count = 25;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	652
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	653 salt = (ascii_to_bin(setting[1]) << 6)
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	654 \| ascii_to_bin(setting[0]);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	655
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	656 output[0] = setting[0];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	657 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	658 * If the encrypted password that the salt was extracted from
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	659 * is only 1 character long, the salt will be corrupted. We
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	660 * need to ensure that the output string doesn't have an extra
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	661 * NUL in it!
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	662 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	663 output[1] = setting[1] ? setting[1] : output[0];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	664
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	665 p = output + 2;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	666 }
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	667 setup_salt(salt);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	668 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	669 * Do it.
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	670 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	671 if (do_des(0, 0, &r0, &r1, count))
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	672 return(NULL);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	673 /*
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	674 * Now encode the result...
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	675 */
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	676 l = (r0 >> 8);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	677 *p++ = ascii64[(l >> 18) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	678 *p++ = ascii64[(l >> 12) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	679 *p++ = ascii64[(l >> 6) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	680 *p++ = ascii64[l & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	681
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	682 l = (r0 << 16) \| ((r1 >> 16) & 0xffff);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	683 *p++ = ascii64[(l >> 18) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	684 *p++ = ascii64[(l >> 12) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	685 *p++ = ascii64[(l >> 6) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	686 *p++ = ascii64[l & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	687
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	688 l = r1 << 2;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	689 *p++ = ascii64[(l >> 12) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	690 *p++ = ascii64[(l >> 6) & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	691 *p++ = ascii64[l & 0x3f];
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	692 *p = 0;
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	693
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	694 return((char *)output);
2128c7dc8a40 Import Super-Rogue 9.0 from the Roguelike Restoration Project (r1490) elwin parents: diff changeset	695 }

Mercurial > hg > early-roguelike

annotate srogue/xcrypt.c @ 119:458df24e973d