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# Omit irrelevant whitespace and comment-only changes,
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947 lines
25 KiB
C
947 lines
25 KiB
C
/*
|
|
* UFC-crypt: ultra fast crypt(3) implementation
|
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*
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* Copyright (C) 1991-2019 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
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*
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|
* This library is distributed in the hope that it will be useful,
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; see the file COPYING.LIB. If not,
|
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* see <https://www.gnu.org/licenses/>.
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*
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* @(#)crypt_util.c 2.56 12/20/96
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*
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* Support routines
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*
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*/
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|
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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#include <atomic.h>
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#include <string.h>
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#ifndef STATIC
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#define STATIC static
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#endif
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#include "crypt-private.h"
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#include <shlib-compat.h>
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/* Prototypes for local functions. */
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#ifndef __GNU_LIBRARY__
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void _ufc_clearmem (char *start, int cnt);
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void _ufc_copymem (char *from, char *to, int cnt);
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#endif
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#ifdef _UFC_32_
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STATIC void shuffle_sb (long32 *k, ufc_long saltbits);
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#else
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STATIC void shuffle_sb (long64 *k, ufc_long saltbits);
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#endif
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|
|
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/*
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* Permutation done once on the 56 bit
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* key derived from the original 8 byte ASCII key.
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*/
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static const int pc1[56] = {
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57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
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10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
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63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
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14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
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};
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/*
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* How much to rotate each 28 bit half of the pc1 permutated
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* 56 bit key before using pc2 to give the i' key
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*/
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static const int rots[16] = {
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1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
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};
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|
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/*
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* Permutation giving the key
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* of the i' DES round
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*/
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static const int pc2[48] = {
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14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
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23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
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41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
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44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
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};
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|
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/*
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* The E expansion table which selects
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* bits from the 32 bit intermediate result.
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*/
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static const int esel[48] = {
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32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
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8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
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16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
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24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1
|
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};
|
|
|
|
/*
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* Permutation done on the
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* result of sbox lookups
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*/
|
|
static const int perm32[32] = {
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16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
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2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
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};
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|
|
|
/*
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|
* The sboxes
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*/
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static const int sbox[8][4][16]= {
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{ { 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 },
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{ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8 },
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{ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0 },
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{ 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 }
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},
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|
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{ { 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 },
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{ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5 },
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{ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15 },
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{ 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 }
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},
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|
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|
{ { 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 },
|
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{ 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 },
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{ 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 },
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{ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 }
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|
},
|
|
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|
{ { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 },
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{ 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 },
|
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{ 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 },
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{ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 }
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},
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|
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{ { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },
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{ 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 },
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{ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 },
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{ 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 }
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},
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|
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{ { 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 },
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{ 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 },
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{ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 },
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{ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 }
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},
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|
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{ { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 },
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{ 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 },
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{ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 },
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{ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 }
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},
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{ { 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 },
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{ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 },
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{ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 },
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{ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 }
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}
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};
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#if SHLIB_COMPAT (libcrypt, GLIBC_2_0, GLIBC_2_28)
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/*
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|
* This is the initial
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* permutation matrix
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|
*/
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static const int initial_perm[64] = {
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58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
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62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
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57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
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61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
|
|
};
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#endif
|
|
|
|
/*
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|
* This is the final
|
|
* permutation matrix
|
|
*/
|
|
static const int final_perm[64] = {
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40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,
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38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,
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36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,
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34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25
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};
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#define ascii_to_bin(c) ((c)>='a'?(c-59):(c)>='A'?((c)-53):(c)-'.')
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#define bin_to_ascii(c) ((c)>=38?((c)-38+'a'):(c)>=12?((c)-12+'A'):(c)+'.')
|
|
|
|
static const ufc_long BITMASK[24] = {
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0x40000000, 0x20000000, 0x10000000, 0x08000000, 0x04000000, 0x02000000,
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0x01000000, 0x00800000, 0x00400000, 0x00200000, 0x00100000, 0x00080000,
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0x00004000, 0x00002000, 0x00001000, 0x00000800, 0x00000400, 0x00000200,
|
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0x00000100, 0x00000080, 0x00000040, 0x00000020, 0x00000010, 0x00000008
|
|
};
|
|
|
|
static const unsigned char bytemask[8] = {
|
|
0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
|
|
};
|
|
|
|
static const ufc_long longmask[32] = {
|
|
0x80000000, 0x40000000, 0x20000000, 0x10000000,
|
|
0x08000000, 0x04000000, 0x02000000, 0x01000000,
|
|
0x00800000, 0x00400000, 0x00200000, 0x00100000,
|
|
0x00080000, 0x00040000, 0x00020000, 0x00010000,
|
|
0x00008000, 0x00004000, 0x00002000, 0x00001000,
|
|
0x00000800, 0x00000400, 0x00000200, 0x00000100,
|
|
0x00000080, 0x00000040, 0x00000020, 0x00000010,
|
|
0x00000008, 0x00000004, 0x00000002, 0x00000001
|
|
};
|
|
|
|
/*
|
|
* do_pc1: permform pc1 permutation in the key schedule generation.
|
|
*
|
|
* The first index is the byte number in the 8 byte ASCII key
|
|
* - second - - the two 28 bits halfs of the result
|
|
* - third - selects the 7 bits actually used of each byte
|
|
*
|
|
* The result is kept with 28 bit per 32 bit with the 4 most significant
|
|
* bits zero.
|
|
*/
|
|
static ufc_long do_pc1[8][2][128];
|
|
|
|
/*
|
|
* do_pc2: permform pc2 permutation in the key schedule generation.
|
|
*
|
|
* The first index is the septet number in the two 28 bit intermediate values
|
|
* - second - - - septet values
|
|
*
|
|
* Knowledge of the structure of the pc2 permutation is used.
|
|
*
|
|
* The result is kept with 28 bit per 32 bit with the 4 most significant
|
|
* bits zero.
|
|
*/
|
|
static ufc_long do_pc2[8][128];
|
|
|
|
/*
|
|
* eperm32tab: do 32 bit permutation and E selection
|
|
*
|
|
* The first index is the byte number in the 32 bit value to be permuted
|
|
* - second - is the value of this byte
|
|
* - third - selects the two 32 bit values
|
|
*
|
|
* The table is used and generated internally in init_des to speed it up
|
|
*/
|
|
static ufc_long eperm32tab[4][256][2];
|
|
|
|
/*
|
|
* efp: undo an extra e selection and do final
|
|
* permutation giving the DES result.
|
|
*
|
|
* Invoked 6 bit a time on two 48 bit values
|
|
* giving two 32 bit longs.
|
|
*/
|
|
static ufc_long efp[16][64][2];
|
|
|
|
/* Table with characters for base64 transformation. */
|
|
static const char b64t[64] =
|
|
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
|
|
|
|
/*
|
|
* For use by the old, non-reentrant routines
|
|
* (crypt/encrypt/setkey)
|
|
*/
|
|
struct crypt_data _ufc_foobar;
|
|
|
|
#ifdef __GNU_LIBRARY__
|
|
#include <libc-lock.h>
|
|
|
|
__libc_lock_define_initialized (static, _ufc_tables_lock)
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
|
|
void
|
|
_ufc_prbits (ufc_long *a, int n)
|
|
{
|
|
ufc_long i, j, t, tmp;
|
|
n /= 8;
|
|
for(i = 0; i < n; i++) {
|
|
tmp=0;
|
|
for(j = 0; j < 8; j++) {
|
|
t=8*i+j;
|
|
tmp|=(a[t/24] & BITMASK[t % 24])?bytemask[j]:0;
|
|
}
|
|
(void)printf("%02lx ", tmp);
|
|
}
|
|
printf(" ");
|
|
}
|
|
|
|
static void __attribute__ ((unused))
|
|
_ufc_set_bits (ufc_long v, ufc_long *b)
|
|
{
|
|
ufc_long i;
|
|
*b = 0;
|
|
for(i = 0; i < 24; i++) {
|
|
if(v & longmask[8 + i])
|
|
*b |= BITMASK[i];
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifndef __GNU_LIBRARY__
|
|
/*
|
|
* Silly rewrites of 'bzero'/'memset'. I do so
|
|
* because some machines don't have
|
|
* bzero and some don't have memset.
|
|
*/
|
|
|
|
void
|
|
_ufc_clearmem (char *start, int cnt)
|
|
{
|
|
while(cnt--)
|
|
*start++ = '\0';
|
|
}
|
|
|
|
void
|
|
_ufc_copymem (char *from, char *to, int cnt)
|
|
{
|
|
while(cnt--)
|
|
*to++ = *from++;
|
|
}
|
|
#else
|
|
#define _ufc_clearmem(start, cnt) memset(start, 0, cnt)
|
|
#define _ufc_copymem(from, to, cnt) memcpy(to, from, cnt)
|
|
#endif
|
|
|
|
/* lookup a 6 bit value in sbox */
|
|
|
|
#define s_lookup(i,s) sbox[(i)][(((s)>>4) & 0x2)|((s) & 0x1)][((s)>>1) & 0xf];
|
|
|
|
/*
|
|
* Initialize unit - may be invoked directly
|
|
* by fcrypt users.
|
|
*/
|
|
|
|
void
|
|
__init_des_r (struct crypt_data * __restrict __data)
|
|
{
|
|
int comes_from_bit;
|
|
int bit, sg;
|
|
ufc_long j;
|
|
ufc_long mask1, mask2;
|
|
int e_inverse[64];
|
|
static volatile int small_tables_initialized = 0;
|
|
|
|
#ifdef _UFC_32_
|
|
long32 *sb[4];
|
|
sb[0] = (long32*)__data->sb0; sb[1] = (long32*)__data->sb1;
|
|
sb[2] = (long32*)__data->sb2; sb[3] = (long32*)__data->sb3;
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
long64 *sb[4];
|
|
sb[0] = (long64*)__data->sb0; sb[1] = (long64*)__data->sb1;
|
|
sb[2] = (long64*)__data->sb2; sb[3] = (long64*)__data->sb3;
|
|
#endif
|
|
|
|
if(small_tables_initialized == 0) {
|
|
#ifdef __GNU_LIBRARY__
|
|
__libc_lock_lock (_ufc_tables_lock);
|
|
if(small_tables_initialized)
|
|
goto small_tables_done;
|
|
#endif
|
|
|
|
/*
|
|
* Create the do_pc1 table used
|
|
* to affect pc1 permutation
|
|
* when generating keys
|
|
*/
|
|
_ufc_clearmem((char*)do_pc1, (int)sizeof(do_pc1));
|
|
for(bit = 0; bit < 56; bit++) {
|
|
comes_from_bit = pc1[bit] - 1;
|
|
mask1 = bytemask[comes_from_bit % 8 + 1];
|
|
mask2 = longmask[bit % 28 + 4];
|
|
for(j = 0; j < 128; j++) {
|
|
if(j & mask1)
|
|
do_pc1[comes_from_bit / 8][bit / 28][j] |= mask2;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the do_pc2 table used
|
|
* to affect pc2 permutation when
|
|
* generating keys
|
|
*/
|
|
_ufc_clearmem((char*)do_pc2, (int)sizeof(do_pc2));
|
|
for(bit = 0; bit < 48; bit++) {
|
|
comes_from_bit = pc2[bit] - 1;
|
|
mask1 = bytemask[comes_from_bit % 7 + 1];
|
|
mask2 = BITMASK[bit % 24];
|
|
for(j = 0; j < 128; j++) {
|
|
if(j & mask1)
|
|
do_pc2[comes_from_bit / 7][j] |= mask2;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now generate the table used to do combined
|
|
* 32 bit permutation and e expansion
|
|
*
|
|
* We use it because we have to permute 16384 32 bit
|
|
* longs into 48 bit in order to initialize sb.
|
|
*
|
|
* Looping 48 rounds per permutation becomes
|
|
* just too slow...
|
|
*
|
|
*/
|
|
|
|
_ufc_clearmem((char*)eperm32tab, (int)sizeof(eperm32tab));
|
|
for(bit = 0; bit < 48; bit++) {
|
|
ufc_long mask1,comes_from;
|
|
comes_from = perm32[esel[bit]-1]-1;
|
|
mask1 = bytemask[comes_from % 8];
|
|
for(j = 256; j--;) {
|
|
if(j & mask1)
|
|
eperm32tab[comes_from / 8][j][bit / 24] |= BITMASK[bit % 24];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create an inverse matrix for esel telling
|
|
* where to plug out bits if undoing it
|
|
*/
|
|
for(bit=48; bit--;) {
|
|
e_inverse[esel[bit] - 1 ] = bit;
|
|
e_inverse[esel[bit] - 1 + 32] = bit + 48;
|
|
}
|
|
|
|
/*
|
|
* create efp: the matrix used to
|
|
* undo the E expansion and effect final permutation
|
|
*/
|
|
_ufc_clearmem((char*)efp, (int)sizeof efp);
|
|
for(bit = 0; bit < 64; bit++) {
|
|
int o_bit, o_long;
|
|
ufc_long word_value, mask1, mask2;
|
|
int comes_from_f_bit, comes_from_e_bit;
|
|
int comes_from_word, bit_within_word;
|
|
|
|
/* See where bit i belongs in the two 32 bit long's */
|
|
o_long = bit / 32; /* 0..1 */
|
|
o_bit = bit % 32; /* 0..31 */
|
|
|
|
/*
|
|
* And find a bit in the e permutated value setting this bit.
|
|
*
|
|
* Note: the e selection may have selected the same bit several
|
|
* times. By the initialization of e_inverse, we only look
|
|
* for one specific instance.
|
|
*/
|
|
comes_from_f_bit = final_perm[bit] - 1; /* 0..63 */
|
|
comes_from_e_bit = e_inverse[comes_from_f_bit]; /* 0..95 */
|
|
comes_from_word = comes_from_e_bit / 6; /* 0..15 */
|
|
bit_within_word = comes_from_e_bit % 6; /* 0..5 */
|
|
|
|
mask1 = longmask[bit_within_word + 26];
|
|
mask2 = longmask[o_bit];
|
|
|
|
for(word_value = 64; word_value--;) {
|
|
if(word_value & mask1)
|
|
efp[comes_from_word][word_value][o_long] |= mask2;
|
|
}
|
|
}
|
|
atomic_write_barrier ();
|
|
small_tables_initialized = 1;
|
|
#ifdef __GNU_LIBRARY__
|
|
small_tables_done:
|
|
__libc_lock_unlock(_ufc_tables_lock);
|
|
#endif
|
|
} else
|
|
atomic_read_barrier ();
|
|
|
|
/*
|
|
* Create the sb tables:
|
|
*
|
|
* For each 12 bit segment of an 48 bit intermediate
|
|
* result, the sb table precomputes the two 4 bit
|
|
* values of the sbox lookups done with the two 6
|
|
* bit halves, shifts them to their proper place,
|
|
* sends them through perm32 and finally E expands
|
|
* them so that they are ready for the next
|
|
* DES round.
|
|
*
|
|
*/
|
|
|
|
if (__data->sb0 + sizeof (__data->sb0) == __data->sb1
|
|
&& __data->sb1 + sizeof (__data->sb1) == __data->sb2
|
|
&& __data->sb2 + sizeof (__data->sb2) == __data->sb3)
|
|
_ufc_clearmem(__data->sb0,
|
|
(int)sizeof(__data->sb0)
|
|
+ (int)sizeof(__data->sb1)
|
|
+ (int)sizeof(__data->sb2)
|
|
+ (int)sizeof(__data->sb3));
|
|
else {
|
|
_ufc_clearmem(__data->sb0, (int)sizeof(__data->sb0));
|
|
_ufc_clearmem(__data->sb1, (int)sizeof(__data->sb1));
|
|
_ufc_clearmem(__data->sb2, (int)sizeof(__data->sb2));
|
|
_ufc_clearmem(__data->sb3, (int)sizeof(__data->sb3));
|
|
}
|
|
|
|
for(sg = 0; sg < 4; sg++) {
|
|
int j1, j2;
|
|
int s1, s2;
|
|
|
|
for(j1 = 0; j1 < 64; j1++) {
|
|
s1 = s_lookup(2 * sg, j1);
|
|
for(j2 = 0; j2 < 64; j2++) {
|
|
ufc_long to_permute, inx;
|
|
|
|
s2 = s_lookup(2 * sg + 1, j2);
|
|
to_permute = (((ufc_long)s1 << 4) |
|
|
(ufc_long)s2) << (24 - 8 * (ufc_long)sg);
|
|
|
|
#ifdef _UFC_32_
|
|
inx = ((j1 << 6) | j2) << 1;
|
|
sb[sg][inx ] = eperm32tab[0][(to_permute >> 24) & 0xff][0];
|
|
sb[sg][inx+1] = eperm32tab[0][(to_permute >> 24) & 0xff][1];
|
|
sb[sg][inx ] |= eperm32tab[1][(to_permute >> 16) & 0xff][0];
|
|
sb[sg][inx+1] |= eperm32tab[1][(to_permute >> 16) & 0xff][1];
|
|
sb[sg][inx ] |= eperm32tab[2][(to_permute >> 8) & 0xff][0];
|
|
sb[sg][inx+1] |= eperm32tab[2][(to_permute >> 8) & 0xff][1];
|
|
sb[sg][inx ] |= eperm32tab[3][(to_permute) & 0xff][0];
|
|
sb[sg][inx+1] |= eperm32tab[3][(to_permute) & 0xff][1];
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
inx = ((j1 << 6) | j2);
|
|
sb[sg][inx] =
|
|
((long64)eperm32tab[0][(to_permute >> 24) & 0xff][0] << 32) |
|
|
(long64)eperm32tab[0][(to_permute >> 24) & 0xff][1];
|
|
sb[sg][inx] |=
|
|
((long64)eperm32tab[1][(to_permute >> 16) & 0xff][0] << 32) |
|
|
(long64)eperm32tab[1][(to_permute >> 16) & 0xff][1];
|
|
sb[sg][inx] |=
|
|
((long64)eperm32tab[2][(to_permute >> 8) & 0xff][0] << 32) |
|
|
(long64)eperm32tab[2][(to_permute >> 8) & 0xff][1];
|
|
sb[sg][inx] |=
|
|
((long64)eperm32tab[3][(to_permute) & 0xff][0] << 32) |
|
|
(long64)eperm32tab[3][(to_permute) & 0xff][1];
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
__data->current_saltbits = 0;
|
|
__data->current_salt[0] = 0;
|
|
__data->current_salt[1] = 0;
|
|
__data->initialized++;
|
|
}
|
|
|
|
void
|
|
__init_des (void)
|
|
{
|
|
__init_des_r(&_ufc_foobar);
|
|
}
|
|
|
|
/*
|
|
* Process the elements of the sb table permuting the
|
|
* bits swapped in the expansion by the current salt.
|
|
*/
|
|
|
|
#ifdef _UFC_32_
|
|
STATIC void
|
|
shuffle_sb (long32 *k, ufc_long saltbits)
|
|
{
|
|
ufc_long j;
|
|
long32 x;
|
|
for(j=4096; j--;) {
|
|
x = (k[0] ^ k[1]) & (long32)saltbits;
|
|
*k++ ^= x;
|
|
*k++ ^= x;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef _UFC_64_
|
|
STATIC void
|
|
shuffle_sb (long64 *k, ufc_long saltbits)
|
|
{
|
|
ufc_long j;
|
|
long64 x;
|
|
for(j=4096; j--;) {
|
|
x = ((*k >> 32) ^ *k) & (long64)saltbits;
|
|
*k++ ^= (x << 32) | x;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Return false iff C is in the specified alphabet for crypt salt.
|
|
*/
|
|
|
|
static bool
|
|
bad_for_salt (char c)
|
|
{
|
|
switch (c)
|
|
{
|
|
case '0' ... '9':
|
|
case 'A' ... 'Z':
|
|
case 'a' ... 'z':
|
|
case '.': case '/':
|
|
return false;
|
|
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup the unit for a new salt
|
|
* Hopefully we'll not see a new salt in each crypt call.
|
|
* Return false if an unexpected character was found in s[0] or s[1].
|
|
*/
|
|
|
|
bool
|
|
_ufc_setup_salt_r (const char *s, struct crypt_data * __restrict __data)
|
|
{
|
|
ufc_long i, j, saltbits;
|
|
char s0, s1;
|
|
|
|
if(__data->initialized == 0)
|
|
__init_des_r(__data);
|
|
|
|
s0 = s[0];
|
|
if(bad_for_salt (s0))
|
|
return false;
|
|
|
|
s1 = s[1];
|
|
if(bad_for_salt (s1))
|
|
return false;
|
|
|
|
if(s0 == __data->current_salt[0] && s1 == __data->current_salt[1])
|
|
return true;
|
|
|
|
__data->current_salt[0] = s0;
|
|
__data->current_salt[1] = s1;
|
|
|
|
/*
|
|
* This is the only crypt change to DES:
|
|
* entries are swapped in the expansion table
|
|
* according to the bits set in the salt.
|
|
*/
|
|
saltbits = 0;
|
|
for(i = 0; i < 2; i++) {
|
|
long c=ascii_to_bin(s[i]);
|
|
for(j = 0; j < 6; j++) {
|
|
if((c >> j) & 0x1)
|
|
saltbits |= BITMASK[6 * i + j];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Permute the sb table values
|
|
* to reflect the changed e
|
|
* selection table
|
|
*/
|
|
#ifdef _UFC_32_
|
|
#define LONGG long32*
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
#define LONGG long64*
|
|
#endif
|
|
|
|
shuffle_sb((LONGG)__data->sb0, __data->current_saltbits ^ saltbits);
|
|
shuffle_sb((LONGG)__data->sb1, __data->current_saltbits ^ saltbits);
|
|
shuffle_sb((LONGG)__data->sb2, __data->current_saltbits ^ saltbits);
|
|
shuffle_sb((LONGG)__data->sb3, __data->current_saltbits ^ saltbits);
|
|
|
|
__data->current_saltbits = saltbits;
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
_ufc_mk_keytab_r (const char *key, struct crypt_data * __restrict __data)
|
|
{
|
|
ufc_long v1, v2, *k1;
|
|
int i;
|
|
#ifdef _UFC_32_
|
|
long32 v, *k2;
|
|
k2 = (long32*)__data->keysched;
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
long64 v, *k2;
|
|
k2 = (long64*)__data->keysched;
|
|
#endif
|
|
|
|
v1 = v2 = 0; k1 = &do_pc1[0][0][0];
|
|
for(i = 8; i--;) {
|
|
v1 |= k1[*key & 0x7f]; k1 += 128;
|
|
v2 |= k1[*key++ & 0x7f]; k1 += 128;
|
|
}
|
|
|
|
for(i = 0; i < 16; i++) {
|
|
k1 = &do_pc2[0][0];
|
|
|
|
v1 = (v1 << rots[i]) | (v1 >> (28 - rots[i]));
|
|
v = k1[(v1 >> 21) & 0x7f]; k1 += 128;
|
|
v |= k1[(v1 >> 14) & 0x7f]; k1 += 128;
|
|
v |= k1[(v1 >> 7) & 0x7f]; k1 += 128;
|
|
v |= k1[(v1 ) & 0x7f]; k1 += 128;
|
|
|
|
#ifdef _UFC_32_
|
|
*k2++ = (v | 0x00008000);
|
|
v = 0;
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
v = (v << 32);
|
|
#endif
|
|
|
|
v2 = (v2 << rots[i]) | (v2 >> (28 - rots[i]));
|
|
v |= k1[(v2 >> 21) & 0x7f]; k1 += 128;
|
|
v |= k1[(v2 >> 14) & 0x7f]; k1 += 128;
|
|
v |= k1[(v2 >> 7) & 0x7f]; k1 += 128;
|
|
v |= k1[(v2 ) & 0x7f];
|
|
|
|
#ifdef _UFC_32_
|
|
*k2++ = (v | 0x00008000);
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
*k2++ = v | 0x0000800000008000l;
|
|
#endif
|
|
}
|
|
|
|
__data->direction = 0;
|
|
}
|
|
|
|
/*
|
|
* Undo an extra E selection and do final permutations
|
|
*/
|
|
|
|
void
|
|
_ufc_dofinalperm_r (ufc_long *res, struct crypt_data * __restrict __data)
|
|
{
|
|
ufc_long v1, v2, x;
|
|
ufc_long l1,l2,r1,r2;
|
|
|
|
l1 = res[0]; l2 = res[1];
|
|
r1 = res[2]; r2 = res[3];
|
|
|
|
x = (l1 ^ l2) & __data->current_saltbits; l1 ^= x; l2 ^= x;
|
|
x = (r1 ^ r2) & __data->current_saltbits; r1 ^= x; r2 ^= x;
|
|
|
|
v1=v2=0; l1 >>= 3; l2 >>= 3; r1 >>= 3; r2 >>= 3;
|
|
|
|
v1 |= efp[15][ r2 & 0x3f][0]; v2 |= efp[15][ r2 & 0x3f][1];
|
|
v1 |= efp[14][(r2 >>= 6) & 0x3f][0]; v2 |= efp[14][ r2 & 0x3f][1];
|
|
v1 |= efp[13][(r2 >>= 10) & 0x3f][0]; v2 |= efp[13][ r2 & 0x3f][1];
|
|
v1 |= efp[12][(r2 >>= 6) & 0x3f][0]; v2 |= efp[12][ r2 & 0x3f][1];
|
|
|
|
v1 |= efp[11][ r1 & 0x3f][0]; v2 |= efp[11][ r1 & 0x3f][1];
|
|
v1 |= efp[10][(r1 >>= 6) & 0x3f][0]; v2 |= efp[10][ r1 & 0x3f][1];
|
|
v1 |= efp[ 9][(r1 >>= 10) & 0x3f][0]; v2 |= efp[ 9][ r1 & 0x3f][1];
|
|
v1 |= efp[ 8][(r1 >>= 6) & 0x3f][0]; v2 |= efp[ 8][ r1 & 0x3f][1];
|
|
|
|
v1 |= efp[ 7][ l2 & 0x3f][0]; v2 |= efp[ 7][ l2 & 0x3f][1];
|
|
v1 |= efp[ 6][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 6][ l2 & 0x3f][1];
|
|
v1 |= efp[ 5][(l2 >>= 10) & 0x3f][0]; v2 |= efp[ 5][ l2 & 0x3f][1];
|
|
v1 |= efp[ 4][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 4][ l2 & 0x3f][1];
|
|
|
|
v1 |= efp[ 3][ l1 & 0x3f][0]; v2 |= efp[ 3][ l1 & 0x3f][1];
|
|
v1 |= efp[ 2][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 2][ l1 & 0x3f][1];
|
|
v1 |= efp[ 1][(l1 >>= 10) & 0x3f][0]; v2 |= efp[ 1][ l1 & 0x3f][1];
|
|
v1 |= efp[ 0][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 0][ l1 & 0x3f][1];
|
|
|
|
res[0] = v1; res[1] = v2;
|
|
}
|
|
|
|
/*
|
|
* crypt only: convert from 64 bit to 11 bit ASCII
|
|
* prefixing with the salt
|
|
*/
|
|
|
|
void
|
|
_ufc_output_conversion_r (ufc_long v1, ufc_long v2, const char *salt,
|
|
struct crypt_data * __restrict __data)
|
|
{
|
|
int i, s, shf;
|
|
|
|
__data->crypt_3_buf[0] = salt[0];
|
|
__data->crypt_3_buf[1] = salt[1] ? salt[1] : salt[0];
|
|
|
|
for(i = 0; i < 5; i++) {
|
|
shf = (26 - 6 * i); /* to cope with MSC compiler bug */
|
|
__data->crypt_3_buf[i + 2] = bin_to_ascii((v1 >> shf) & 0x3f);
|
|
}
|
|
|
|
s = (v2 & 0xf) << 2;
|
|
v2 = (v2 >> 2) | ((v1 & 0x3) << 30);
|
|
|
|
for(i = 5; i < 10; i++) {
|
|
shf = (56 - 6 * i);
|
|
__data->crypt_3_buf[i + 2] = bin_to_ascii((v2 >> shf) & 0x3f);
|
|
}
|
|
|
|
__data->crypt_3_buf[12] = bin_to_ascii(s);
|
|
__data->crypt_3_buf[13] = 0;
|
|
}
|
|
|
|
#if SHLIB_COMPAT (libcrypt, GLIBC_2_0, GLIBC_2_28)
|
|
|
|
/*
|
|
* UNIX encrypt function. Takes a bitvector
|
|
* represented by one byte per bit and
|
|
* encrypt/decrypt according to edflag
|
|
*/
|
|
|
|
void
|
|
__encrypt_r (char *__block, int __edflag,
|
|
struct crypt_data * __restrict __data)
|
|
{
|
|
ufc_long l1, l2, r1, r2, res[4];
|
|
int i;
|
|
#ifdef _UFC_32_
|
|
long32 *kt;
|
|
kt = (long32*)__data->keysched;
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
long64 *kt;
|
|
kt = (long64*)__data->keysched;
|
|
#endif
|
|
|
|
/*
|
|
* Undo any salt changes to E expansion
|
|
*/
|
|
_ufc_setup_salt_r("..", __data);
|
|
|
|
/*
|
|
* Reverse key table if
|
|
* changing operation (encrypt/decrypt)
|
|
*/
|
|
if((__edflag == 0) != (__data->direction == 0)) {
|
|
for(i = 0; i < 8; i++) {
|
|
#ifdef _UFC_32_
|
|
long32 x;
|
|
x = kt[2 * (15-i)];
|
|
kt[2 * (15-i)] = kt[2 * i];
|
|
kt[2 * i] = x;
|
|
|
|
x = kt[2 * (15-i) + 1];
|
|
kt[2 * (15-i) + 1] = kt[2 * i + 1];
|
|
kt[2 * i + 1] = x;
|
|
#endif
|
|
#ifdef _UFC_64_
|
|
long64 x;
|
|
x = kt[15-i];
|
|
kt[15-i] = kt[i];
|
|
kt[i] = x;
|
|
#endif
|
|
}
|
|
__data->direction = __edflag;
|
|
}
|
|
|
|
/*
|
|
* Do initial permutation + E expansion
|
|
*/
|
|
i = 0;
|
|
for(l1 = 0; i < 24; i++) {
|
|
if(__block[initial_perm[esel[i]-1]-1])
|
|
l1 |= BITMASK[i];
|
|
}
|
|
for(l2 = 0; i < 48; i++) {
|
|
if(__block[initial_perm[esel[i]-1]-1])
|
|
l2 |= BITMASK[i-24];
|
|
}
|
|
|
|
i = 0;
|
|
for(r1 = 0; i < 24; i++) {
|
|
if(__block[initial_perm[esel[i]-1+32]-1])
|
|
r1 |= BITMASK[i];
|
|
}
|
|
for(r2 = 0; i < 48; i++) {
|
|
if(__block[initial_perm[esel[i]-1+32]-1])
|
|
r2 |= BITMASK[i-24];
|
|
}
|
|
|
|
/*
|
|
* Do DES inner loops + final conversion
|
|
*/
|
|
res[0] = l1; res[1] = l2;
|
|
res[2] = r1; res[3] = r2;
|
|
_ufc_doit_r((ufc_long)1, __data, &res[0]);
|
|
|
|
/*
|
|
* Do final permutations
|
|
*/
|
|
_ufc_dofinalperm_r(res, __data);
|
|
|
|
/*
|
|
* And convert to bit array
|
|
*/
|
|
l1 = res[0]; r1 = res[1];
|
|
for(i = 0; i < 32; i++) {
|
|
*__block++ = (l1 & longmask[i]) != 0;
|
|
}
|
|
for(i = 0; i < 32; i++) {
|
|
*__block++ = (r1 & longmask[i]) != 0;
|
|
}
|
|
}
|
|
weak_alias (__encrypt_r, encrypt_r)
|
|
compat_symbol (libcrypt, encrypt_r, encrypt_r, GLIBC_2_0);
|
|
|
|
void
|
|
encrypt (char *__block, int __edflag)
|
|
{
|
|
__encrypt_r(__block, __edflag, &_ufc_foobar);
|
|
}
|
|
compat_symbol (libcrypt, encrypt, encrypt, GLIBC_2_0);
|
|
|
|
|
|
/*
|
|
* UNIX setkey function. Take a 64 bit DES
|
|
* key and setup the machinery.
|
|
*/
|
|
|
|
void
|
|
__setkey_r (const char *__key, struct crypt_data * __restrict __data)
|
|
{
|
|
int i,j;
|
|
unsigned char c;
|
|
unsigned char ktab[8];
|
|
|
|
_ufc_setup_salt_r("..", __data); /* be sure we're initialized */
|
|
|
|
for(i = 0; i < 8; i++) {
|
|
for(j = 0, c = 0; j < 8; j++)
|
|
c = c << 1 | *__key++;
|
|
ktab[i] = c >> 1;
|
|
}
|
|
_ufc_mk_keytab_r((char *) ktab, __data);
|
|
}
|
|
weak_alias (__setkey_r, setkey_r)
|
|
compat_symbol (libcrypt, setkey_r, setkey_r, GLIBC_2_0);
|
|
|
|
void
|
|
setkey (const char *__key)
|
|
{
|
|
__setkey_r(__key, &_ufc_foobar);
|
|
}
|
|
compat_symbol (libcrypt, setkey, setkey, GLIBC_2_0);
|
|
#endif /* SHLIB_COMPAT (libcrypt, GLIBC_2_0, GLIBC_2_28) */
|
|
|
|
void
|
|
__b64_from_24bit (char **cp, int *buflen,
|
|
unsigned int b2, unsigned int b1, unsigned int b0,
|
|
int n)
|
|
{
|
|
unsigned int w = (b2 << 16) | (b1 << 8) | b0;
|
|
while (n-- > 0 && (*buflen) > 0)
|
|
{
|
|
*(*cp)++ = b64t[w & 0x3f];
|
|
--(*buflen);
|
|
w >>= 6;
|
|
}
|
|
}
|