| 1 | #if defined(HAVE_UNISTD_H)
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| 2 | #include <unistd.h>
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| 3 | #endif
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| 4 |
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| 5 | #include <sys/types.h>
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| 6 |
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| 7 | #ifdef HAVE_STRING_H
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| 8 | #include <string.h>
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| 9 | #endif
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| 10 |
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| 11 | #ifdef HAVE_STRINGS_H
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| 12 | #include <strings.h>
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| 13 | #endif
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| 14 |
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| 15 | #if !defined(HAVE_CRYPT)
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| 16 |
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| 17 | /*
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| 18 | This bit of code was derived from the UFC-crypt package which
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| 19 | carries the following copyright
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| 20 |
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| 21 | Modified for use by Samba by Andrew Tridgell, October 1994
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| 22 |
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| 23 | Note that this routine is only faster on some machines. Under Linux 1.1.51
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| 24 | libc 4.5.26 I actually found this routine to be slightly slower.
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| 25 |
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| 26 | Under SunOS I found a huge speedup by using these routines
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| 27 | (a factor of 20 or so)
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| 28 |
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| 29 | Warning: I've had a report from Steve Kennedy <steve@gbnet.org>
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| 30 | that this crypt routine may sometimes get the wrong answer. Only
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| 31 | use UFC_CRYT if you really need it.
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| 32 |
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| 33 | */
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| 34 |
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| 35 | /*
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| 36 | * UFC-crypt: ultra fast crypt(3) implementation
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| 37 | *
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| 38 | * Copyright (C) 1991-1998, Free Software Foundation, Inc.
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| 39 | *
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| 40 | * This library is free software; you can redistribute it and/or
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| 41 | * modify it under the terms of the GNU Library General Public
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| 42 | * License as published by the Free Software Foundation; either
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| 43 | * version 2 of the License, or (at your option) any later version.
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| 44 | *
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| 45 | * This library is distributed in the hope that it will be useful,
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| 46 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 47 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 48 | * Library General Public License for more details.
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| 49 | *
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| 50 | * You should have received a copy of the GNU Library General Public
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| 51 | * License along with this library; if not, write to the Free
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| 52 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 53 | *
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| 54 | * @(#)crypt_util.c 2.31 02/08/92
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| 55 | *
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| 56 | * Support routines
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| 57 | *
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| 58 | */
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| 59 |
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| 60 |
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| 61 | #ifndef long32
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| 62 | #if (SIZEOF_INT == 4)
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| 63 | #define long32 int
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| 64 | #elif (SIZEOF_LONG == 4)
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| 65 | #define long32 long
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| 66 | #elif (SIZEOF_SHORT == 4)
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| 67 | #define long32 short
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| 68 | #else
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| 69 | /* uggh - no 32 bit type?? probably a CRAY. just hope this works ... */
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| 70 | #define long32 int
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| 71 | #endif
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| 72 | #endif
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| 73 |
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| 74 | #ifndef long64
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| 75 | #ifdef HAVE_LONGLONG
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| 76 | #define long64 long long long
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| 77 | #endif
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| 78 | #endif
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| 79 |
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| 80 | #ifndef ufc_long
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| 81 | #define ufc_long unsigned
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| 82 | #endif
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| 83 |
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| 84 | #ifndef _UFC_64_
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| 85 | #define _UFC_32_
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| 86 | #endif
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| 87 |
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| 88 | /*
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| 89 | * Permutation done once on the 56 bit
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| 90 | * key derived from the original 8 byte ASCII key.
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| 91 | */
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| 92 | static int pc1[56] = {
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| 93 | 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
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| 94 | 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
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| 95 | 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
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| 96 | 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
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| 97 | };
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| 98 |
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| 99 | /*
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| 100 | * How much to rotate each 28 bit half of the pc1 permutated
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| 101 | * 56 bit key before using pc2 to give the i' key
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| 102 | */
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| 103 | static int rots[16] = {
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| 104 | 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
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| 105 | };
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| 106 |
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| 107 | /*
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| 108 | * Permutation giving the key
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| 109 | * of the i' DES round
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| 110 | */
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| 111 | static int pc2[48] = {
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| 112 | 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
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| 113 | 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
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| 114 | 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
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| 115 | 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
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| 116 | };
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| 117 |
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| 118 | /*
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| 119 | * The E expansion table which selects
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| 120 | * bits from the 32 bit intermediate result.
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| 121 | */
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| 122 | static int esel[48] = {
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| 123 | 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
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| 124 | 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
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| 125 | 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
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| 126 | 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1
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| 127 | };
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| 128 | static int e_inverse[64];
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| 129 |
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| 130 | /*
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| 131 | * Permutation done on the
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| 132 | * result of sbox lookups
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| 133 | */
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| 134 | static int perm32[32] = {
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| 135 | 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
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| 136 | 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
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| 137 | };
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| 138 |
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| 139 | /*
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| 140 | * The sboxes
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| 141 | */
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| 142 | static int sbox[8][4][16]= {
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| 143 | { { 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 },
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| 144 | { 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8 },
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| 145 | { 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0 },
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| 146 | { 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 }
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| 147 | },
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| 148 |
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| 149 | { { 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 },
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| 150 | { 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5 },
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| 151 | { 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15 },
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| 152 | { 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 }
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| 153 | },
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| 154 |
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| 155 | { { 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 },
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| 156 | { 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 },
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| 157 | { 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 },
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| 158 | { 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 }
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| 159 | },
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| 160 |
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| 161 | { { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 },
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| 162 | { 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 },
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| 163 | { 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 },
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| 164 | { 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 }
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| 165 | },
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| 166 |
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| 167 | { { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },
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| 168 | { 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 },
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| 169 | { 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 },
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| 170 | { 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 }
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| 171 | },
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| 172 |
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| 173 | { { 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 },
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| 174 | { 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 },
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| 175 | { 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 },
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| 176 | { 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 }
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| 177 | },
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| 178 |
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| 179 | { { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 },
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| 180 | { 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 },
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| 181 | { 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 },
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| 182 | { 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 }
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| 183 | },
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| 184 |
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| 185 | { { 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 },
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| 186 | { 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 },
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| 187 | { 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 },
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| 188 | { 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 }
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| 189 | }
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| 190 | };
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| 191 |
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| 192 | /*
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| 193 | * This is the final
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| 194 | * permutation matrix
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| 195 | */
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| 196 | static int final_perm[64] = {
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| 197 | 40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,
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| 198 | 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,
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| 199 | 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,
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| 200 | 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25
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| 201 | };
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| 202 |
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| 203 | /*
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| 204 | * The 16 DES keys in BITMASK format
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| 205 | */
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| 206 | #ifdef _UFC_32_
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| 207 | long32 _ufc_keytab[16][2];
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| 208 | #endif
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| 209 |
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| 210 | #ifdef _UFC_64_
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| 211 | long64 _ufc_keytab[16];
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| 212 | #endif
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| 213 |
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| 214 |
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| 215 | #define ascii_to_bin(c) ((c)>='a'?(c-59):(c)>='A'?((c)-53):(c)-'.')
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| 216 | #define bin_to_ascii(c) ((c)>=38?((c)-38+'a'):(c)>=12?((c)-12+'A'):(c)+'.')
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| 217 |
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| 218 | /* Macro to set a bit (0..23) */
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| 219 | #define BITMASK(i) ( (1<<(11-(i)%12+3)) << ((i)<12?16:0) )
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| 220 |
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| 221 | /*
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| 222 | * sb arrays:
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| 223 | *
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| 224 | * Workhorses of the inner loop of the DES implementation.
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| 225 | * They do sbox lookup, shifting of this value, 32 bit
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| 226 | * permutation and E permutation for the next round.
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| 227 | *
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| 228 | * Kept in 'BITMASK' format.
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| 229 | */
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| 230 |
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| 231 | #ifdef _UFC_32_
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| 232 | long32 _ufc_sb0[8192], _ufc_sb1[8192], _ufc_sb2[8192], _ufc_sb3[8192];
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| 233 | static long32 *sb[4] = {_ufc_sb0, _ufc_sb1, _ufc_sb2, _ufc_sb3};
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| 234 | #endif
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| 235 |
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| 236 | #ifdef _UFC_64_
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| 237 | long64 _ufc_sb0[4096], _ufc_sb1[4096], _ufc_sb2[4096], _ufc_sb3[4096];
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| 238 | static long64 *sb[4] = {_ufc_sb0, _ufc_sb1, _ufc_sb2, _ufc_sb3};
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| 239 | #endif
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| 240 |
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| 241 | /*
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| 242 | * eperm32tab: do 32 bit permutation and E selection
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| 243 | *
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| 244 | * The first index is the byte number in the 32 bit value to be permuted
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| 245 | * - second - is the value of this byte
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| 246 | * - third - selects the two 32 bit values
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| 247 | *
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| 248 | * The table is used and generated internally in init_des to speed it up
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| 249 | */
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| 250 | static ufc_long eperm32tab[4][256][2];
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| 251 |
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| 252 | /*
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| 253 | * do_pc1: permform pc1 permutation in the key schedule generation.
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| 254 | *
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| 255 | * The first index is the byte number in the 8 byte ASCII key
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| 256 | * - second - - the two 28 bits halfs of the result
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| 257 | * - third - selects the 7 bits actually used of each byte
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| 258 | *
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| 259 | * The result is kept with 28 bit per 32 bit with the 4 most significant
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| 260 | * bits zero.
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| 261 | */
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| 262 | static ufc_long do_pc1[8][2][128];
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| 263 |
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| 264 | /*
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| 265 | * do_pc2: permform pc2 permutation in the key schedule generation.
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| 266 | *
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| 267 | * The first index is the septet number in the two 28 bit intermediate values
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| 268 | * - second - - - septet values
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| 269 | *
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| 270 | * Knowledge of the structure of the pc2 permutation is used.
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| 271 | *
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| 272 | * The result is kept with 28 bit per 32 bit with the 4 most significant
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| 273 | * bits zero.
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| 274 | */
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| 275 | static ufc_long do_pc2[8][128];
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| 276 |
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| 277 | /*
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| 278 | * efp: undo an extra e selection and do final
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| 279 | * permutation giving the DES result.
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| 280 | *
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| 281 | * Invoked 6 bit a time on two 48 bit values
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| 282 | * giving two 32 bit longs.
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| 283 | */
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| 284 | static ufc_long efp[16][64][2];
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| 285 |
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| 286 | static unsigned char bytemask[8] = {
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| 287 | 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
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| 288 | };
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| 289 |
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| 290 | static ufc_long longmask[32] = {
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| 291 | 0x80000000, 0x40000000, 0x20000000, 0x10000000,
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| 292 | 0x08000000, 0x04000000, 0x02000000, 0x01000000,
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| 293 | 0x00800000, 0x00400000, 0x00200000, 0x00100000,
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| 294 | 0x00080000, 0x00040000, 0x00020000, 0x00010000,
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| 295 | 0x00008000, 0x00004000, 0x00002000, 0x00001000,
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| 296 | 0x00000800, 0x00000400, 0x00000200, 0x00000100,
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| 297 | 0x00000080, 0x00000040, 0x00000020, 0x00000010,
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| 298 | 0x00000008, 0x00000004, 0x00000002, 0x00000001
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| 299 | };
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| 300 |
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| 301 |
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| 302 | /*
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| 303 | * Silly rewrite of 'bzero'. I do so
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| 304 | * because some machines don't have
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| 305 | * bzero and some don't have memset.
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| 306 | */
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| 307 |
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| 308 | static void clearmem(char *start, int cnt)
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| 309 | { while(cnt--)
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| 310 | *start++ = '\0';
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| 311 | }
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| 312 |
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| 313 | static int initialized = 0;
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| 314 |
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| 315 | /* lookup a 6 bit value in sbox */
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| 316 |
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| 317 | #define s_lookup(i,s) sbox[(i)][(((s)>>4) & 0x2)|((s) & 0x1)][((s)>>1) & 0xf];
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| 318 |
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| 319 | /*
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| 320 | * Initialize unit - may be invoked directly
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| 321 | * by fcrypt users.
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| 322 | */
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| 323 |
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| 324 | static void ufc_init_des(void)
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| 325 | { int comes_from_bit;
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| 326 | int bit, sg;
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| 327 | ufc_long j;
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| 328 | ufc_long mask1, mask2;
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| 329 |
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| 330 | /*
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| 331 | * Create the do_pc1 table used
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| 332 | * to affect pc1 permutation
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| 333 | * when generating keys
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| 334 | */
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| 335 | for(bit = 0; bit < 56; bit++) {
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| 336 | comes_from_bit = pc1[bit] - 1;
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| 337 | mask1 = bytemask[comes_from_bit % 8 + 1];
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| 338 | mask2 = longmask[bit % 28 + 4];
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| 339 | for(j = 0; j < 128; j++) {
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| 340 | if(j & mask1)
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| 341 | do_pc1[comes_from_bit / 8][bit / 28][j] |= mask2;
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| 342 | }
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| 343 | }
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| 344 |
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| 345 | /*
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| 346 | * Create the do_pc2 table used
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| 347 | * to affect pc2 permutation when
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| 348 | * generating keys
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| 349 | */
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| 350 | for(bit = 0; bit < 48; bit++) {
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| 351 | comes_from_bit = pc2[bit] - 1;
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| 352 | mask1 = bytemask[comes_from_bit % 7 + 1];
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| 353 | mask2 = BITMASK(bit % 24);
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| 354 | for(j = 0; j < 128; j++) {
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| 355 | if(j & mask1)
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| 356 | do_pc2[comes_from_bit / 7][j] |= mask2;
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| 357 | }
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| 358 | }
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| 359 |
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| 360 | /*
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| 361 | * Now generate the table used to do combined
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| 362 | * 32 bit permutation and e expansion
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| 363 | *
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| 364 | * We use it because we have to permute 16384 32 bit
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| 365 | * longs into 48 bit in order to initialize sb.
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| 366 | *
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| 367 | * Looping 48 rounds per permutation becomes
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| 368 | * just too slow...
|
|---|
| 369 | *
|
|---|
| 370 | */
|
|---|
| 371 |
|
|---|
| 372 | clearmem((char*)eperm32tab, sizeof(eperm32tab));
|
|---|
| 373 |
|
|---|
| 374 | for(bit = 0; bit < 48; bit++) {
|
|---|
| 375 | ufc_long inner_mask1,comes_from;
|
|---|
| 376 |
|
|---|
| 377 | comes_from = perm32[esel[bit]-1]-1;
|
|---|
| 378 | inner_mask1 = bytemask[comes_from % 8];
|
|---|
| 379 |
|
|---|
| 380 | for(j = 256; j--;) {
|
|---|
| 381 | if(j & inner_mask1)
|
|---|
| 382 | eperm32tab[comes_from / 8][j][bit / 24] |= BITMASK(bit % 24);
|
|---|
| 383 | }
|
|---|
| 384 | }
|
|---|
| 385 |
|
|---|
| 386 | /*
|
|---|
| 387 | * Create the sb tables:
|
|---|
| 388 | *
|
|---|
| 389 | * For each 12 bit segment of an 48 bit intermediate
|
|---|
| 390 | * result, the sb table precomputes the two 4 bit
|
|---|
| 391 | * values of the sbox lookups done with the two 6
|
|---|
| 392 | * bit halves, shifts them to their proper place,
|
|---|
| 393 | * sends them through perm32 and finally E expands
|
|---|
| 394 | * them so that they are ready for the next
|
|---|
| 395 | * DES round.
|
|---|
| 396 | *
|
|---|
| 397 | */
|
|---|
| 398 | for(sg = 0; sg < 4; sg++) {
|
|---|
| 399 | int j1, j2;
|
|---|
| 400 | int s1, s2;
|
|---|
| 401 |
|
|---|
| 402 | for(j1 = 0; j1 < 64; j1++) {
|
|---|
| 403 | s1 = s_lookup(2 * sg, j1);
|
|---|
| 404 | for(j2 = 0; j2 < 64; j2++) {
|
|---|
| 405 | ufc_long to_permute, inx;
|
|---|
| 406 |
|
|---|
| 407 | s2 = s_lookup(2 * sg + 1, j2);
|
|---|
| 408 | to_permute = ((s1 << 4) | s2) << (24 - 8 * sg);
|
|---|
| 409 |
|
|---|
| 410 | #ifdef _UFC_32_
|
|---|
| 411 | inx = ((j1 << 6) | j2) << 1;
|
|---|
| 412 | sb[sg][inx ] = eperm32tab[0][(to_permute >> 24) & 0xff][0];
|
|---|
| 413 | sb[sg][inx+1] = eperm32tab[0][(to_permute >> 24) & 0xff][1];
|
|---|
| 414 | sb[sg][inx ] |= eperm32tab[1][(to_permute >> 16) & 0xff][0];
|
|---|
| 415 | sb[sg][inx+1] |= eperm32tab[1][(to_permute >> 16) & 0xff][1];
|
|---|
| 416 | sb[sg][inx ] |= eperm32tab[2][(to_permute >> 8) & 0xff][0];
|
|---|
| 417 | sb[sg][inx+1] |= eperm32tab[2][(to_permute >> 8) & 0xff][1];
|
|---|
| 418 | sb[sg][inx ] |= eperm32tab[3][(to_permute) & 0xff][0];
|
|---|
| 419 | sb[sg][inx+1] |= eperm32tab[3][(to_permute) & 0xff][1];
|
|---|
| 420 | #endif
|
|---|
| 421 | #ifdef _UFC_64_
|
|---|
| 422 | inx = ((j1 << 6) | j2);
|
|---|
| 423 | sb[sg][inx] =
|
|---|
| 424 | ((long64)eperm32tab[0][(to_permute >> 24) & 0xff][0] << 32) |
|
|---|
| 425 | (long64)eperm32tab[0][(to_permute >> 24) & 0xff][1];
|
|---|
| 426 | sb[sg][inx] |=
|
|---|
| 427 | ((long64)eperm32tab[1][(to_permute >> 16) & 0xff][0] << 32) |
|
|---|
| 428 | (long64)eperm32tab[1][(to_permute >> 16) & 0xff][1];
|
|---|
| 429 | sb[sg][inx] |=
|
|---|
| 430 | ((long64)eperm32tab[2][(to_permute >> 8) & 0xff][0] << 32) |
|
|---|
| 431 | (long64)eperm32tab[2][(to_permute >> 8) & 0xff][1];
|
|---|
| 432 | sb[sg][inx] |=
|
|---|
| 433 | ((long64)eperm32tab[3][(to_permute) & 0xff][0] << 32) |
|
|---|
| 434 | (long64)eperm32tab[3][(to_permute) & 0xff][1];
|
|---|
| 435 | #endif
|
|---|
| 436 | }
|
|---|
| 437 | }
|
|---|
| 438 | }
|
|---|
| 439 |
|
|---|
| 440 | /*
|
|---|
| 441 | * Create an inverse matrix for esel telling
|
|---|
| 442 | * where to plug out bits if undoing it
|
|---|
| 443 | */
|
|---|
| 444 | for(bit=48; bit--;) {
|
|---|
| 445 | e_inverse[esel[bit] - 1 ] = bit;
|
|---|
| 446 | e_inverse[esel[bit] - 1 + 32] = bit + 48;
|
|---|
| 447 | }
|
|---|
| 448 |
|
|---|
| 449 | /*
|
|---|
| 450 | * create efp: the matrix used to
|
|---|
| 451 | * undo the E expansion and effect final permutation
|
|---|
| 452 | */
|
|---|
| 453 | clearmem((char*)efp, sizeof efp);
|
|---|
| 454 | for(bit = 0; bit < 64; bit++) {
|
|---|
| 455 | int o_bit, o_long;
|
|---|
| 456 | ufc_long word_value, inner_mask1, inner_mask2;
|
|---|
| 457 | int comes_from_f_bit, comes_from_e_bit;
|
|---|
| 458 | int comes_from_word, bit_within_word;
|
|---|
| 459 |
|
|---|
| 460 | /* See where bit i belongs in the two 32 bit long's */
|
|---|
| 461 | o_long = bit / 32; /* 0..1 */
|
|---|
| 462 | o_bit = bit % 32; /* 0..31 */
|
|---|
| 463 |
|
|---|
| 464 | /*
|
|---|
| 465 | * And find a bit in the e permutated value setting this bit.
|
|---|
| 466 | *
|
|---|
| 467 | * Note: the e selection may have selected the same bit several
|
|---|
| 468 | * times. By the initialization of e_inverse, we only look
|
|---|
| 469 | * for one specific instance.
|
|---|
| 470 | */
|
|---|
| 471 | comes_from_f_bit = final_perm[bit] - 1; /* 0..63 */
|
|---|
| 472 | comes_from_e_bit = e_inverse[comes_from_f_bit]; /* 0..95 */
|
|---|
| 473 | comes_from_word = comes_from_e_bit / 6; /* 0..15 */
|
|---|
| 474 | bit_within_word = comes_from_e_bit % 6; /* 0..5 */
|
|---|
| 475 |
|
|---|
| 476 | inner_mask1 = longmask[bit_within_word + 26];
|
|---|
| 477 | inner_mask2 = longmask[o_bit];
|
|---|
| 478 |
|
|---|
| 479 | for(word_value = 64; word_value--;) {
|
|---|
| 480 | if(word_value & inner_mask1)
|
|---|
| 481 | efp[comes_from_word][word_value][o_long] |= inner_mask2;
|
|---|
| 482 | }
|
|---|
| 483 | }
|
|---|
| 484 | initialized++;
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | /*
|
|---|
| 488 | * Process the elements of the sb table permuting the
|
|---|
| 489 | * bits swapped in the expansion by the current salt.
|
|---|
| 490 | */
|
|---|
| 491 |
|
|---|
| 492 | #ifdef _UFC_32_
|
|---|
| 493 | static void shuffle_sb(long32 *k, ufc_long saltbits)
|
|---|
| 494 | { ufc_long j;
|
|---|
| 495 | long32 x;
|
|---|
| 496 | for(j=4096; j--;) {
|
|---|
| 497 | x = (k[0] ^ k[1]) & (long32)saltbits;
|
|---|
| 498 | *k++ ^= x;
|
|---|
| 499 | *k++ ^= x;
|
|---|
| 500 | }
|
|---|
| 501 | }
|
|---|
| 502 | #endif
|
|---|
| 503 |
|
|---|
| 504 | #ifdef _UFC_64_
|
|---|
| 505 | static void shuffle_sb(long64 *k, ufc_long saltbits)
|
|---|
| 506 | { ufc_long j;
|
|---|
| 507 | long64 x;
|
|---|
| 508 | for(j=4096; j--;) {
|
|---|
| 509 | x = ((*k >> 32) ^ *k) & (long64)saltbits;
|
|---|
| 510 | *k++ ^= (x << 32) | x;
|
|---|
| 511 | }
|
|---|
| 512 | }
|
|---|
| 513 | #endif
|
|---|
| 514 |
|
|---|
| 515 | /*
|
|---|
| 516 | * Setup the unit for a new salt
|
|---|
| 517 | * Hopefully we'll not see a new salt in each crypt call.
|
|---|
| 518 | */
|
|---|
| 519 |
|
|---|
| 520 | static unsigned char current_salt[3] = "&&"; /* invalid value */
|
|---|
| 521 | static ufc_long current_saltbits = 0;
|
|---|
| 522 | static int direction = 0;
|
|---|
| 523 |
|
|---|
| 524 | static void setup_salt(const char *s1)
|
|---|
| 525 | { ufc_long i, j, saltbits;
|
|---|
| 526 | const unsigned char *s2 = (const unsigned char *)s1;
|
|---|
| 527 |
|
|---|
| 528 | if(!initialized)
|
|---|
| 529 | ufc_init_des();
|
|---|
| 530 |
|
|---|
| 531 | if(s2[0] == current_salt[0] && s2[1] == current_salt[1])
|
|---|
| 532 | return;
|
|---|
| 533 | current_salt[0] = s2[0]; current_salt[1] = s2[1];
|
|---|
| 534 |
|
|---|
| 535 | /*
|
|---|
| 536 | * This is the only crypt change to DES:
|
|---|
| 537 | * entries are swapped in the expansion table
|
|---|
| 538 | * according to the bits set in the salt.
|
|---|
| 539 | */
|
|---|
| 540 | saltbits = 0;
|
|---|
| 541 | for(i = 0; i < 2; i++) {
|
|---|
| 542 | long c=ascii_to_bin(s2[i]);
|
|---|
| 543 | if(c < 0 || c > 63)
|
|---|
| 544 | c = 0;
|
|---|
| 545 | for(j = 0; j < 6; j++) {
|
|---|
| 546 | if((c >> j) & 0x1)
|
|---|
| 547 | saltbits |= BITMASK(6 * i + j);
|
|---|
| 548 | }
|
|---|
| 549 | }
|
|---|
| 550 |
|
|---|
| 551 | /*
|
|---|
| 552 | * Permute the sb table values
|
|---|
| 553 | * to reflect the changed e
|
|---|
| 554 | * selection table
|
|---|
| 555 | */
|
|---|
| 556 | shuffle_sb(_ufc_sb0, current_saltbits ^ saltbits);
|
|---|
| 557 | shuffle_sb(_ufc_sb1, current_saltbits ^ saltbits);
|
|---|
| 558 | shuffle_sb(_ufc_sb2, current_saltbits ^ saltbits);
|
|---|
| 559 | shuffle_sb(_ufc_sb3, current_saltbits ^ saltbits);
|
|---|
| 560 |
|
|---|
| 561 | current_saltbits = saltbits;
|
|---|
| 562 | }
|
|---|
| 563 |
|
|---|
| 564 | static void ufc_mk_keytab(char *key)
|
|---|
| 565 | { ufc_long v1, v2, *k1;
|
|---|
| 566 | int i;
|
|---|
| 567 | #ifdef _UFC_32_
|
|---|
| 568 | long32 v, *k2 = &_ufc_keytab[0][0];
|
|---|
| 569 | #endif
|
|---|
| 570 | #ifdef _UFC_64_
|
|---|
| 571 | long64 v, *k2 = &_ufc_keytab[0];
|
|---|
| 572 | #endif
|
|---|
| 573 |
|
|---|
| 574 | v1 = v2 = 0; k1 = &do_pc1[0][0][0];
|
|---|
| 575 | for(i = 8; i--;) {
|
|---|
| 576 | v1 |= k1[*key & 0x7f]; k1 += 128;
|
|---|
| 577 | v2 |= k1[*key++ & 0x7f]; k1 += 128;
|
|---|
| 578 | }
|
|---|
| 579 |
|
|---|
| 580 | for(i = 0; i < 16; i++) {
|
|---|
| 581 | k1 = &do_pc2[0][0];
|
|---|
| 582 |
|
|---|
| 583 | v1 = (v1 << rots[i]) | (v1 >> (28 - rots[i]));
|
|---|
| 584 | v = k1[(v1 >> 21) & 0x7f]; k1 += 128;
|
|---|
| 585 | v |= k1[(v1 >> 14) & 0x7f]; k1 += 128;
|
|---|
| 586 | v |= k1[(v1 >> 7) & 0x7f]; k1 += 128;
|
|---|
| 587 | v |= k1[(v1 ) & 0x7f]; k1 += 128;
|
|---|
| 588 |
|
|---|
| 589 | #ifdef _UFC_32_
|
|---|
| 590 | *k2++ = v;
|
|---|
| 591 | v = 0;
|
|---|
| 592 | #endif
|
|---|
| 593 | #ifdef _UFC_64_
|
|---|
| 594 | v <<= 32;
|
|---|
| 595 | #endif
|
|---|
| 596 |
|
|---|
| 597 | v2 = (v2 << rots[i]) | (v2 >> (28 - rots[i]));
|
|---|
| 598 | v |= k1[(v2 >> 21) & 0x7f]; k1 += 128;
|
|---|
| 599 | v |= k1[(v2 >> 14) & 0x7f]; k1 += 128;
|
|---|
| 600 | v |= k1[(v2 >> 7) & 0x7f]; k1 += 128;
|
|---|
| 601 | v |= k1[(v2 ) & 0x7f];
|
|---|
| 602 |
|
|---|
| 603 | *k2++ = v;
|
|---|
| 604 | }
|
|---|
| 605 |
|
|---|
| 606 | direction = 0;
|
|---|
| 607 | }
|
|---|
| 608 |
|
|---|
| 609 | /*
|
|---|
| 610 | * Undo an extra E selection and do final permutations
|
|---|
| 611 | */
|
|---|
| 612 |
|
|---|
| 613 | ufc_long *_ufc_dofinalperm(ufc_long l1, ufc_long l2, ufc_long r1, ufc_long r2)
|
|---|
| 614 | { ufc_long v1, v2, x;
|
|---|
| 615 | static ufc_long ary[2];
|
|---|
| 616 |
|
|---|
| 617 | x = (l1 ^ l2) & current_saltbits; l1 ^= x; l2 ^= x;
|
|---|
| 618 | x = (r1 ^ r2) & current_saltbits; r1 ^= x; r2 ^= x;
|
|---|
| 619 |
|
|---|
| 620 | v1=v2=0; l1 >>= 3; l2 >>= 3; r1 >>= 3; r2 >>= 3;
|
|---|
| 621 |
|
|---|
| 622 | v1 |= efp[15][ r2 & 0x3f][0]; v2 |= efp[15][ r2 & 0x3f][1];
|
|---|
| 623 | v1 |= efp[14][(r2 >>= 6) & 0x3f][0]; v2 |= efp[14][ r2 & 0x3f][1];
|
|---|
| 624 | v1 |= efp[13][(r2 >>= 10) & 0x3f][0]; v2 |= efp[13][ r2 & 0x3f][1];
|
|---|
| 625 | v1 |= efp[12][(r2 >>= 6) & 0x3f][0]; v2 |= efp[12][ r2 & 0x3f][1];
|
|---|
| 626 |
|
|---|
| 627 | v1 |= efp[11][ r1 & 0x3f][0]; v2 |= efp[11][ r1 & 0x3f][1];
|
|---|
| 628 | v1 |= efp[10][(r1 >>= 6) & 0x3f][0]; v2 |= efp[10][ r1 & 0x3f][1];
|
|---|
| 629 | v1 |= efp[ 9][(r1 >>= 10) & 0x3f][0]; v2 |= efp[ 9][ r1 & 0x3f][1];
|
|---|
| 630 | v1 |= efp[ 8][(r1 >>= 6) & 0x3f][0]; v2 |= efp[ 8][ r1 & 0x3f][1];
|
|---|
| 631 |
|
|---|
| 632 | v1 |= efp[ 7][ l2 & 0x3f][0]; v2 |= efp[ 7][ l2 & 0x3f][1];
|
|---|
| 633 | v1 |= efp[ 6][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 6][ l2 & 0x3f][1];
|
|---|
| 634 | v1 |= efp[ 5][(l2 >>= 10) & 0x3f][0]; v2 |= efp[ 5][ l2 & 0x3f][1];
|
|---|
| 635 | v1 |= efp[ 4][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 4][ l2 & 0x3f][1];
|
|---|
| 636 |
|
|---|
| 637 | v1 |= efp[ 3][ l1 & 0x3f][0]; v2 |= efp[ 3][ l1 & 0x3f][1];
|
|---|
| 638 | v1 |= efp[ 2][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 2][ l1 & 0x3f][1];
|
|---|
| 639 | v1 |= efp[ 1][(l1 >>= 10) & 0x3f][0]; v2 |= efp[ 1][ l1 & 0x3f][1];
|
|---|
| 640 | v1 |= efp[ 0][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 0][ l1 & 0x3f][1];
|
|---|
| 641 |
|
|---|
| 642 | ary[0] = v1; ary[1] = v2;
|
|---|
| 643 | return ary;
|
|---|
| 644 | }
|
|---|
| 645 |
|
|---|
| 646 | /*
|
|---|
| 647 | * crypt only: convert from 64 bit to 11 bit ASCII
|
|---|
| 648 | * prefixing with the salt
|
|---|
| 649 | */
|
|---|
| 650 |
|
|---|
| 651 | static char *output_conversion(ufc_long v1, ufc_long v2, const char *salt)
|
|---|
| 652 | { static char outbuf[14];
|
|---|
| 653 | int i, s;
|
|---|
| 654 |
|
|---|
| 655 | outbuf[0] = salt[0];
|
|---|
| 656 | outbuf[1] = salt[1] ? salt[1] : salt[0];
|
|---|
| 657 |
|
|---|
| 658 | for(i = 0; i < 5; i++)
|
|---|
| 659 | outbuf[i + 2] = bin_to_ascii((v1 >> (26 - 6 * i)) & 0x3f);
|
|---|
| 660 |
|
|---|
| 661 | s = (v2 & 0xf) << 2;
|
|---|
| 662 | v2 = (v2 >> 2) | ((v1 & 0x3) << 30);
|
|---|
| 663 |
|
|---|
| 664 | for(i = 5; i < 10; i++)
|
|---|
| 665 | outbuf[i + 2] = bin_to_ascii((v2 >> (56 - 6 * i)) & 0x3f);
|
|---|
| 666 |
|
|---|
| 667 | outbuf[12] = bin_to_ascii(s);
|
|---|
| 668 | outbuf[13] = 0;
|
|---|
| 669 |
|
|---|
| 670 | return outbuf;
|
|---|
| 671 | }
|
|---|
| 672 |
|
|---|
| 673 | /*
|
|---|
| 674 | * UNIX crypt function
|
|---|
| 675 | */
|
|---|
| 676 |
|
|---|
| 677 | static ufc_long *_ufc_doit(ufc_long , ufc_long, ufc_long, ufc_long, ufc_long);
|
|---|
| 678 |
|
|---|
| 679 | char *ufc_crypt(const char *key,const char *salt)
|
|---|
| 680 | { ufc_long *s;
|
|---|
| 681 | char ktab[9];
|
|---|
| 682 |
|
|---|
| 683 | /*
|
|---|
| 684 | * Hack DES tables according to salt
|
|---|
| 685 | */
|
|---|
| 686 | setup_salt(salt);
|
|---|
| 687 |
|
|---|
| 688 | /*
|
|---|
| 689 | * Setup key schedule
|
|---|
| 690 | */
|
|---|
| 691 | clearmem(ktab, sizeof ktab);
|
|---|
| 692 | strncpy(ktab, key, 8);
|
|---|
| 693 | ufc_mk_keytab(ktab);
|
|---|
| 694 |
|
|---|
| 695 | /*
|
|---|
| 696 | * Go for the 25 DES encryptions
|
|---|
| 697 | */
|
|---|
| 698 | s = _ufc_doit((ufc_long)0, (ufc_long)0,
|
|---|
| 699 | (ufc_long)0, (ufc_long)0, (ufc_long)25);
|
|---|
| 700 |
|
|---|
| 701 | /*
|
|---|
| 702 | * And convert back to 6 bit ASCII
|
|---|
| 703 | */
|
|---|
| 704 | return output_conversion(s[0], s[1], salt);
|
|---|
| 705 | }
|
|---|
| 706 |
|
|---|
| 707 |
|
|---|
| 708 | #ifdef _UFC_32_
|
|---|
| 709 |
|
|---|
| 710 | /*
|
|---|
| 711 | * 32 bit version
|
|---|
| 712 | */
|
|---|
| 713 |
|
|---|
| 714 | extern long32 _ufc_keytab[16][2];
|
|---|
| 715 | extern long32 _ufc_sb0[], _ufc_sb1[], _ufc_sb2[], _ufc_sb3[];
|
|---|
| 716 |
|
|---|
| 717 | #define SBA(sb, v) (*(long32*)((char*)(sb)+(v)))
|
|---|
| 718 |
|
|---|
| 719 | static ufc_long *_ufc_doit(ufc_long l1, ufc_long l2, ufc_long r1, ufc_long r2, ufc_long itr)
|
|---|
| 720 | { int i;
|
|---|
| 721 | long32 s, *k;
|
|---|
| 722 |
|
|---|
| 723 | while(itr--) {
|
|---|
| 724 | k = &_ufc_keytab[0][0];
|
|---|
| 725 | for(i=8; i--; ) {
|
|---|
| 726 | s = *k++ ^ r1;
|
|---|
| 727 | l1 ^= SBA(_ufc_sb1, s & 0xffff); l2 ^= SBA(_ufc_sb1, (s & 0xffff)+4);
|
|---|
| 728 | l1 ^= SBA(_ufc_sb0, s >>= 16); l2 ^= SBA(_ufc_sb0, (s) +4);
|
|---|
| 729 | s = *k++ ^ r2;
|
|---|
| 730 | l1 ^= SBA(_ufc_sb3, s & 0xffff); l2 ^= SBA(_ufc_sb3, (s & 0xffff)+4);
|
|---|
| 731 | l1 ^= SBA(_ufc_sb2, s >>= 16); l2 ^= SBA(_ufc_sb2, (s) +4);
|
|---|
| 732 |
|
|---|
| 733 | s = *k++ ^ l1;
|
|---|
| 734 | r1 ^= SBA(_ufc_sb1, s & 0xffff); r2 ^= SBA(_ufc_sb1, (s & 0xffff)+4);
|
|---|
| 735 | r1 ^= SBA(_ufc_sb0, s >>= 16); r2 ^= SBA(_ufc_sb0, (s) +4);
|
|---|
| 736 | s = *k++ ^ l2;
|
|---|
| 737 | r1 ^= SBA(_ufc_sb3, s & 0xffff); r2 ^= SBA(_ufc_sb3, (s & 0xffff)+4);
|
|---|
| 738 | r1 ^= SBA(_ufc_sb2, s >>= 16); r2 ^= SBA(_ufc_sb2, (s) +4);
|
|---|
| 739 | }
|
|---|
| 740 | s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
|
|---|
| 741 | }
|
|---|
| 742 | return _ufc_dofinalperm(l1, l2, r1, r2);
|
|---|
| 743 | }
|
|---|
| 744 |
|
|---|
| 745 | #endif
|
|---|
| 746 |
|
|---|
| 747 | #ifdef _UFC_64_
|
|---|
| 748 |
|
|---|
| 749 | /*
|
|---|
| 750 | * 64 bit version
|
|---|
| 751 | */
|
|---|
| 752 |
|
|---|
| 753 | extern long64 _ufc_keytab[16];
|
|---|
| 754 | extern long64 _ufc_sb0[], _ufc_sb1[], _ufc_sb2[], _ufc_sb3[];
|
|---|
| 755 |
|
|---|
| 756 | #define SBA(sb, v) (*(long64*)((char*)(sb)+(v)))
|
|---|
| 757 |
|
|---|
| 758 | static ufc_long *_ufc_doit(ufc_long l1, ufc_long l2, ufc_long r1, ufc_long r2, ufc_long itr)
|
|---|
| 759 | { int i;
|
|---|
| 760 | long64 l, r, s, *k;
|
|---|
| 761 |
|
|---|
| 762 | l = (((long64)l1) << 32) | ((long64)l2);
|
|---|
| 763 | r = (((long64)r1) << 32) | ((long64)r2);
|
|---|
| 764 |
|
|---|
| 765 | while(itr--) {
|
|---|
| 766 | k = &_ufc_keytab[0];
|
|---|
| 767 | for(i=8; i--; ) {
|
|---|
| 768 | s = *k++ ^ r;
|
|---|
| 769 | l ^= SBA(_ufc_sb3, (s >> 0) & 0xffff);
|
|---|
| 770 | l ^= SBA(_ufc_sb2, (s >> 16) & 0xffff);
|
|---|
| 771 | l ^= SBA(_ufc_sb1, (s >> 32) & 0xffff);
|
|---|
| 772 | l ^= SBA(_ufc_sb0, (s >> 48) & 0xffff);
|
|---|
| 773 |
|
|---|
| 774 | s = *k++ ^ l;
|
|---|
| 775 | r ^= SBA(_ufc_sb3, (s >> 0) & 0xffff);
|
|---|
| 776 | r ^= SBA(_ufc_sb2, (s >> 16) & 0xffff);
|
|---|
| 777 | r ^= SBA(_ufc_sb1, (s >> 32) & 0xffff);
|
|---|
| 778 | r ^= SBA(_ufc_sb0, (s >> 48) & 0xffff);
|
|---|
| 779 | }
|
|---|
| 780 | s=l; l=r; r=s;
|
|---|
| 781 | }
|
|---|
| 782 |
|
|---|
| 783 | l1 = l >> 32; l2 = l & 0xffffffff;
|
|---|
| 784 | r1 = r >> 32; r2 = r & 0xffffffff;
|
|---|
| 785 | return _ufc_dofinalperm(l1, l2, r1, r2);
|
|---|
| 786 | }
|
|---|
| 787 |
|
|---|
| 788 | #endif
|
|---|
| 789 |
|
|---|
| 790 | #define crypt ufc_crypt
|
|---|
| 791 | #endif
|
|---|
| 792 |
|
|---|
| 793 | main()
|
|---|
| 794 | {
|
|---|
| 795 | char passwd[9];
|
|---|
| 796 | char salt[9];
|
|---|
| 797 | char c_out1[256];
|
|---|
| 798 | char c_out2[256];
|
|---|
| 799 |
|
|---|
| 800 | char expected_out[14];
|
|---|
| 801 |
|
|---|
| 802 | strcpy(expected_out, "12yJ.Of/NQ.Pk");
|
|---|
| 803 | strcpy(passwd, "12345678");
|
|---|
| 804 | strcpy(salt, "12345678");
|
|---|
| 805 |
|
|---|
| 806 | strcpy(c_out1, crypt(passwd, salt));
|
|---|
| 807 | salt[2] = '\0';
|
|---|
| 808 | strcpy(c_out2, crypt(passwd, salt));
|
|---|
| 809 |
|
|---|
| 810 | /*
|
|---|
| 811 | * If the non-trucated salt fails but the
|
|---|
| 812 | * truncated salt succeeds then exit 1.
|
|---|
| 813 | */
|
|---|
| 814 |
|
|---|
| 815 | if((strcmp(c_out1, expected_out) != 0) &&
|
|---|
| 816 | (strcmp(c_out2, expected_out) == 0))
|
|---|
| 817 | exit(1);
|
|---|
| 818 |
|
|---|
| 819 | #ifdef HAVE_BIGCRYPT
|
|---|
| 820 | /*
|
|---|
| 821 | * Try the same with bigcrypt...
|
|---|
| 822 | */
|
|---|
| 823 |
|
|---|
| 824 | {
|
|---|
| 825 | char big_passwd[17];
|
|---|
| 826 | char big_salt[17];
|
|---|
| 827 | char big_c_out1[256];
|
|---|
| 828 | char big_c_out2[256];
|
|---|
| 829 | char big_expected_out[27];
|
|---|
| 830 |
|
|---|
| 831 | strcpy(big_passwd, "1234567812345678");
|
|---|
| 832 | strcpy(big_salt, "1234567812345678");
|
|---|
| 833 | strcpy(big_expected_out, "12yJ.Of/NQ.PklfyCuHi/rwM");
|
|---|
| 834 |
|
|---|
| 835 | strcpy(big_c_out1, bigcrypt(big_passwd, big_salt));
|
|---|
| 836 | big_salt[2] = '\0';
|
|---|
| 837 | strcpy(big_c_out2, bigcrypt(big_passwd, big_salt));
|
|---|
| 838 |
|
|---|
| 839 | /*
|
|---|
| 840 | * If the non-trucated salt fails but the
|
|---|
| 841 | * truncated salt succeeds then exit 1.
|
|---|
| 842 | */
|
|---|
| 843 |
|
|---|
| 844 | if((strcmp(big_c_out1, big_expected_out) != 0) &&
|
|---|
| 845 | (strcmp(big_c_out2, big_expected_out) == 0))
|
|---|
| 846 | exit(1);
|
|---|
| 847 |
|
|---|
| 848 | }
|
|---|
| 849 | #endif
|
|---|
| 850 |
|
|---|
| 851 | exit(0);
|
|---|
| 852 | }
|
|---|
