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The functions encrypt, setkey, encrypt_r, setkey_r, cbc_crypt, ecb_crypt, and des_setparity should not be used in new programs, because they use the DES block cipher, which is unacceptably weak by modern standards. Demote all of them to compatibility symbols, and remove their prototypes from installed headers. cbc_crypt, ecb_crypt, and des_setparity were already compat symbols when glibc was configured with --disable-obsolete-rpc. POSIX requires encrypt and setkey to be available when _XOPEN_CRYPT is defined, so this change also removes the definition of X_OPEN_CRYPT from <unistd.h>. The entire "DES Encryption" section is dropped from the manual, as is the mention of AUTH_DES and FIPS 140-2 in the introduction to crypt.texi. The documentation of 'memfrob' cross-referenced the DES Encryption section, which is replaced by a hyperlink to libgcrypt, and while I was in there I spruced up the actual documentation of 'memfrob' and 'strfry' a little. It's still fairly jokey, because those functions _are_ jokes, but they do also have real use cases, so people trying to use them for real should have all the information they need. DES-based authentication for Sun RPC is also insecure and should be deprecated or even removed, but maybe that can be left as TI-RPC's problem.
947 lines
25 KiB
C
947 lines
25 KiB
C
/*
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* UFC-crypt: ultra fast crypt(3) implementation
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*
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* Copyright (C) 1991-2018 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
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* License as published by the Free Software Foundation; either
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* 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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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
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* License along with this library; see the file COPYING.LIB. If not,
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* see <http://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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#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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* 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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* 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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* 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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/*
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* Permutation done on the
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* result of sbox lookups
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*/
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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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{ { 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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{ { 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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{ { 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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{ { 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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{ { 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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};
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#endif
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/*
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* This is the final
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* permutation matrix
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*/
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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)+'.')
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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
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};
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static const unsigned char bytemask[8] = {
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0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
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};
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static const ufc_long longmask[32] = {
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0x80000000, 0x40000000, 0x20000000, 0x10000000,
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0x08000000, 0x04000000, 0x02000000, 0x01000000,
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0x00800000, 0x00400000, 0x00200000, 0x00100000,
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0x00080000, 0x00040000, 0x00020000, 0x00010000,
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0x00008000, 0x00004000, 0x00002000, 0x00001000,
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0x00000800, 0x00000400, 0x00000200, 0x00000100,
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0x00000080, 0x00000040, 0x00000020, 0x00000010,
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0x00000008, 0x00000004, 0x00000002, 0x00000001
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};
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/*
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* do_pc1: permform pc1 permutation in the key schedule generation.
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*
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* The first index is the byte number in the 8 byte ASCII key
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* - second - - the two 28 bits halfs of the result
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* - third - selects the 7 bits actually used of each byte
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*
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* The result is kept with 28 bit per 32 bit with the 4 most significant
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* bits zero.
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*/
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static ufc_long do_pc1[8][2][128];
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/*
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* do_pc2: permform pc2 permutation in the key schedule generation.
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*
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* The first index is the septet number in the two 28 bit intermediate values
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* - second - - - septet values
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*
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* Knowledge of the structure of the pc2 permutation is used.
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*
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* The result is kept with 28 bit per 32 bit with the 4 most significant
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* bits zero.
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*/
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static ufc_long do_pc2[8][128];
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/*
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* eperm32tab: do 32 bit permutation and E selection
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*
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* The first index is the byte number in the 32 bit value to be permuted
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* - second - is the value of this byte
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* - third - selects the two 32 bit values
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*
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* The table is used and generated internally in init_des to speed it up
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*/
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static ufc_long eperm32tab[4][256][2];
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/*
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* efp: undo an extra e selection and do final
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* permutation giving the DES result.
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*
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* Invoked 6 bit a time on two 48 bit values
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* giving two 32 bit longs.
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*/
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static ufc_long efp[16][64][2];
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/* Table with characters for base64 transformation. */
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static const char b64t[64] =
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"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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/*
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* For use by the old, non-reentrant routines
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* (crypt/encrypt/setkey)
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*/
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struct crypt_data _ufc_foobar;
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#ifdef __GNU_LIBRARY__
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#include <libc-lock.h>
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__libc_lock_define_initialized (static, _ufc_tables_lock)
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#endif
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#ifdef DEBUG
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void
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_ufc_prbits (ufc_long *a, int n)
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{
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ufc_long i, j, t, tmp;
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n /= 8;
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for(i = 0; i < n; i++) {
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tmp=0;
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for(j = 0; j < 8; j++) {
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t=8*i+j;
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tmp|=(a[t/24] & BITMASK[t % 24])?bytemask[j]:0;
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}
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(void)printf("%02lx ", tmp);
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}
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printf(" ");
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}
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static void __attribute__ ((unused))
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_ufc_set_bits (ufc_long v, ufc_long *b)
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{
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ufc_long i;
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*b = 0;
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for(i = 0; i < 24; i++) {
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if(v & longmask[8 + i])
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*b |= BITMASK[i];
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}
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}
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#endif
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#ifndef __GNU_LIBRARY__
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/*
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* Silly rewrites of 'bzero'/'memset'. I do so
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* because some machines don't have
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* bzero and some don't have memset.
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*/
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void
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_ufc_clearmem (char *start, int cnt)
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{
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while(cnt--)
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*start++ = '\0';
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}
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void
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_ufc_copymem (char *from, char *to, int cnt)
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{
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while(cnt--)
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*to++ = *from++;
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}
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#else
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#define _ufc_clearmem(start, cnt) memset(start, 0, cnt)
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#define _ufc_copymem(from, to, cnt) memcpy(to, from, cnt)
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#endif
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/* lookup a 6 bit value in sbox */
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#define s_lookup(i,s) sbox[(i)][(((s)>>4) & 0x2)|((s) & 0x1)][((s)>>1) & 0xf];
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/*
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* Initialize unit - may be invoked directly
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* by fcrypt users.
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*/
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void
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__init_des_r (struct crypt_data * __restrict __data)
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{
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int comes_from_bit;
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int bit, sg;
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ufc_long j;
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ufc_long mask1, mask2;
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int e_inverse[64];
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static volatile int small_tables_initialized = 0;
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#ifdef _UFC_32_
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long32 *sb[4];
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sb[0] = (long32*)__data->sb0; sb[1] = (long32*)__data->sb1;
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sb[2] = (long32*)__data->sb2; sb[3] = (long32*)__data->sb3;
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#endif
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#ifdef _UFC_64_
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long64 *sb[4];
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sb[0] = (long64*)__data->sb0; sb[1] = (long64*)__data->sb1;
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sb[2] = (long64*)__data->sb2; sb[3] = (long64*)__data->sb3;
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#endif
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if(small_tables_initialized == 0) {
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#ifdef __GNU_LIBRARY__
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__libc_lock_lock (_ufc_tables_lock);
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if(small_tables_initialized)
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goto small_tables_done;
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#endif
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/*
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* Create the do_pc1 table used
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* to affect pc1 permutation
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* when generating keys
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*/
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_ufc_clearmem((char*)do_pc1, (int)sizeof(do_pc1));
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for(bit = 0; bit < 56; bit++) {
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comes_from_bit = pc1[bit] - 1;
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mask1 = bytemask[comes_from_bit % 8 + 1];
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mask2 = longmask[bit % 28 + 4];
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for(j = 0; j < 128; j++) {
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if(j & mask1)
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do_pc1[comes_from_bit / 8][bit / 28][j] |= mask2;
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}
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}
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|
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/*
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* Create the do_pc2 table used
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* to affect pc2 permutation when
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* generating keys
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*/
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_ufc_clearmem((char*)do_pc2, (int)sizeof(do_pc2));
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for(bit = 0; bit < 48; bit++) {
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comes_from_bit = pc2[bit] - 1;
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mask1 = bytemask[comes_from_bit % 7 + 1];
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mask2 = BITMASK[bit % 24];
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for(j = 0; j < 128; j++) {
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if(j & mask1)
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do_pc2[comes_from_bit / 7][j] |= mask2;
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}
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}
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|
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/*
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* Now generate the table used to do combined
|
|
* 32 bit permutation and e expansion
|
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*
|
|
* 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
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|
* just too slow...
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*
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|
*/
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|
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_ufc_clearmem((char*)eperm32tab, (int)sizeof(eperm32tab));
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for(bit = 0; bit < 48; bit++) {
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ufc_long mask1,comes_from;
|
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comes_from = perm32[esel[bit]-1]-1;
|
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mask1 = bytemask[comes_from % 8];
|
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for(j = 256; j--;) {
|
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if(j & mask1)
|
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eperm32tab[comes_from / 8][j][bit / 24] |= BITMASK[bit % 24];
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}
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}
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|
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/*
|
|
* Create an inverse matrix for esel telling
|
|
* where to plug out bits if undoing it
|
|
*/
|
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for(bit=48; bit--;) {
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e_inverse[esel[bit] - 1 ] = bit;
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e_inverse[esel[bit] - 1 + 32] = bit + 48;
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}
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|
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/*
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* create efp: the matrix used to
|
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* undo the E expansion and effect final permutation
|
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*/
|
|
_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;
|
|
}
|
|
}
|