Early Roguelike Collection: urogue/xcrypt.c annotate

annotate urogue/xcrypt.c @ 258:2908dc47f9e2

UltraRogue: fix crash when restoring. The r_flags field in struct room was being written as an int and read as a short. This caused the restore functions to receive the wrong data, usually an impossible string length, and abort. This breaks save compatibility, though the save files had problems anyway: the r_fires field should have been used, instead of reading and writing r_flags twice.

author	John "Elwin" Edwards
date	Wed, 08 Feb 2017 19:50:36 -0500
parents	c495a4f288c6
children	e52a8a7ad4c5

rev	line source
256 c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	1 /*
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	2 * FreeSec: libcrypt
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	3 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	4 * Copyright (C) 1994 David Burren
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	5 * All rights reserved.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	6 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	7 * Redistribution and use in source and binary forms, with or without
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	8 * modification, are permitted provided that the following conditions
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	9 * are met:
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	10 * 1. Redistributions of source code must retain the above copyright
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	11 * notice, this list of conditions and the following disclaimer.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	12 * 2. Redistributions in binary form must reproduce the above copyright
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	13 * notice, this list of conditions and the following disclaimer in the
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	14 * documentation and/or other materials provided with the distribution.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	15 * 3. Neither the name(s) of the author(s) nor the names of other contributors
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	16 * may be used to endorse or promote products derived from this software
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	17 * without specific prior written permission.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	18 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	29 * SUCH DAMAGE.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	30 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	31 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	32 * This is an original implementation of the DES and the crypt(3) interfaces
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	33 * by David Burren <davidb@werj.com.au>.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	34 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	35 * An excellent reference on the underlying algorithm (and related
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	36 * algorithms) is:
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	37 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	38 * B. Schneier, Applied Cryptography: protocols, algorithms,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	39 * and source code in C, John Wiley & Sons, 1994.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	40 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	41 * Note that in that book's description of DES the lookups for the initial,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	42 * pbox, and final permutations are inverted (this has been brought to the
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	43 * attention of the author). A list of errata for this book has been
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	44 * posted to the sci.crypt newsgroup by the author and is available for FTP.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	45 *
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	46 * NOTE:
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	47 * This file has a static version of des_setkey() so that crypt.o exports
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	48 * only the crypt() interface. This is required to make binaries linked
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	49 * against crypt.o exportable or re-exportable from the USA.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	50 */
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	51
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	52 #include <sys/types.h>
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	53 #include <string.h>
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	54
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	55 extern unsigned long int md_ntohl(unsigned long int x);
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	56 extern unsigned long int md_htonl(unsigned long int x);
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	57
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	58 #define _PASSWORD_EFMT1 '_'
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	59
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	60 static unsigned char IP[64] = {
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	61 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	62 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	63 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	64 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	65 };
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	66
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	67 static unsigned char inv_key_perm[64];
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	68 static unsigned char key_perm[56] = {
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	69 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	70 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	71 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	72 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	73 };
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	74
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	75 static unsigned char key_shifts[16] = {
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	76 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	77 };
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	78
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	79 static unsigned char inv_comp_perm[56];
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	80 static unsigned char comp_perm[48] = {
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	81 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	82 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	83 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	84 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	85 };
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	86
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	87 /*
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	88 * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	89 */
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	90
c495a4f288c6 Import UltraRogue from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	91 static unsigned char u_sbox[8][64];

Mercurial > hg > early-roguelike

annotate urogue/xcrypt.c @ 258:2908dc47f9e2