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glibc/crypt/crypt.c
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/* | |
* UFC-crypt: ultra fast crypt(3) implementation | |
* | |
* Copyright (C) 1991-2016 Free Software Foundation, Inc. | |
* | |
* This library is free software; you can redistribute it and/or | |
* 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. | |
* | |
* This library is distributed in the hope that it will be useful, | |
* 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. | |
* | |
* You should have received a copy of the GNU Lesser General Public | |
* License along with this library; see the file COPYING.LIB. If not, | |
* see <http://www.gnu.org/licenses/>. | |
* | |
* @(#)crypt.c 2.25 12/20/96 | |
* | |
* Semiportable C version | |
* | |
*/ | |
#include "crypt-private.h" | |
#ifdef _UFC_32_ | |
/* | |
* 32 bit version | |
*/ | |
#define SBA(sb, v) (*(long32*)((char*)(sb)+(v))) | |
void | |
_ufc_doit_r (ufc_long itr, struct crypt_data * __restrict __data, | |
ufc_long *res) | |
{ | |
int i; | |
long32 s, *k; | |
long32 *sb01 = (long32*)__data->sb0; | |
long32 *sb23 = (long32*)__data->sb2; | |
long32 l1, l2, r1, r2; | |
l1 = (long32)res[0]; l2 = (long32)res[1]; | |
r1 = (long32)res[2]; r2 = (long32)res[3]; | |
while(itr--) { | |
k = (long32*)__data->keysched; | |
for(i=8; i--; ) { | |
s = *k++ ^ r1; | |
l1 ^= SBA(sb01, s & 0xffff); l2 ^= SBA(sb01, (s & 0xffff)+4); | |
l1 ^= SBA(sb01, s >>= 16 ); l2 ^= SBA(sb01, (s )+4); | |
s = *k++ ^ r2; | |
l1 ^= SBA(sb23, s & 0xffff); l2 ^= SBA(sb23, (s & 0xffff)+4); | |
l1 ^= SBA(sb23, s >>= 16 ); l2 ^= SBA(sb23, (s )+4); | |
s = *k++ ^ l1; | |
r1 ^= SBA(sb01, s & 0xffff); r2 ^= SBA(sb01, (s & 0xffff)+4); | |
r1 ^= SBA(sb01, s >>= 16 ); r2 ^= SBA(sb01, (s )+4); | |
s = *k++ ^ l2; | |
r1 ^= SBA(sb23, s & 0xffff); r2 ^= SBA(sb23, (s & 0xffff)+4); | |
r1 ^= SBA(sb23, s >>= 16 ); r2 ^= SBA(sb23, (s )+4); | |
} | |
s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s; | |
} | |
res[0] = l1; res[1] = l2; res[2] = r1; res[3] = r2; | |
} | |
#endif | |
#ifdef _UFC_64_ | |
/* | |
* 64 bit version | |
*/ | |
#define SBA(sb, v) (*(long64*)((char*)(sb)+(v))) | |
void | |
_ufc_doit_r (ufc_long itr, struct crypt_data * __restrict __data, | |
ufc_long *res) | |
{ | |
int i; | |
long64 l, r, s, *k; | |
long64 *sb01 = (long64*)__data->sb0; | |
long64 *sb23 = (long64*)__data->sb2; | |
l = (((long64)res[0]) << 32) | ((long64)res[1]); | |
r = (((long64)res[2]) << 32) | ((long64)res[3]); | |
while(itr--) { | |
k = (long64*)__data->keysched; | |
for(i=8; i--; ) { | |
s = *k++ ^ r; | |
l ^= SBA(sb23, (s ) & 0xffff); | |
l ^= SBA(sb23, (s >>= 16) & 0xffff); | |
l ^= SBA(sb01, (s >>= 16) & 0xffff); | |
l ^= SBA(sb01, (s >>= 16) ); | |
s = *k++ ^ l; | |
r ^= SBA(sb23, (s ) & 0xffff); | |
r ^= SBA(sb23, (s >>= 16) & 0xffff); | |
r ^= SBA(sb01, (s >>= 16) & 0xffff); | |
r ^= SBA(sb01, (s >>= 16) ); | |
} | |
s=l; l=r; r=s; | |
} | |
res[0] = l >> 32; res[1] = l & 0xffffffff; | |
res[2] = r >> 32; res[3] = r & 0xffffffff; | |
} | |
#endif |