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116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
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* UFC-crypt: ultra fast crypt(3) implementation
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*
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* Copyright (C) 1991-2023 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 <https://www.gnu.org/licenses/>.
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*
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* @(#)crypt.c 2.25 12/20/96
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*
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* Semiportable C version
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*
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*/
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#include "crypt-private.h"
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#ifdef _UFC_32_
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/*
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* 32 bit version
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*/
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#define SBA(sb, v) (*(long32*)((char*)(sb)+(v)))
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void
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_ufc_doit_r (ufc_long itr, struct crypt_data * __restrict __data,
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ufc_long *res)
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{
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int i;
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long32 s, *k;
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long32 *sb01 = (long32*)__data->sb0;
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long32 *sb23 = (long32*)__data->sb2;
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long32 l1, l2, r1, r2;
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l1 = (long32)res[0]; l2 = (long32)res[1];
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r1 = (long32)res[2]; r2 = (long32)res[3];
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while(itr--) {
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k = (long32*)__data->keysched;
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for(i=8; i--; ) {
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s = *k++ ^ r1;
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l1 ^= SBA(sb01, s & 0xffff); l2 ^= SBA(sb01, (s & 0xffff)+4);
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l1 ^= SBA(sb01, s >>= 16 ); l2 ^= SBA(sb01, (s )+4);
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s = *k++ ^ r2;
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l1 ^= SBA(sb23, s & 0xffff); l2 ^= SBA(sb23, (s & 0xffff)+4);
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l1 ^= SBA(sb23, s >>= 16 ); l2 ^= SBA(sb23, (s )+4);
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s = *k++ ^ l1;
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r1 ^= SBA(sb01, s & 0xffff); r2 ^= SBA(sb01, (s & 0xffff)+4);
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r1 ^= SBA(sb01, s >>= 16 ); r2 ^= SBA(sb01, (s )+4);
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s = *k++ ^ l2;
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r1 ^= SBA(sb23, s & 0xffff); r2 ^= SBA(sb23, (s & 0xffff)+4);
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r1 ^= SBA(sb23, s >>= 16 ); r2 ^= SBA(sb23, (s )+4);
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}
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s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
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}
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res[0] = l1; res[1] = l2; res[2] = r1; res[3] = r2;
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}
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#endif
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#ifdef _UFC_64_
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/*
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* 64 bit version
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*/
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#define SBA(sb, v) (*(long64*)((char*)(sb)+(v)))
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void
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_ufc_doit_r (ufc_long itr, struct crypt_data * __restrict __data,
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ufc_long *res)
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{
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int i;
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long64 l, r, s, *k;
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long64 *sb01 = (long64*)__data->sb0;
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long64 *sb23 = (long64*)__data->sb2;
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l = (((long64)res[0]) << 32) | ((long64)res[1]);
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r = (((long64)res[2]) << 32) | ((long64)res[3]);
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while(itr--) {
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k = (long64*)__data->keysched;
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for(i=8; i--; ) {
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s = *k++ ^ r;
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l ^= SBA(sb23, (s ) & 0xffff);
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l ^= SBA(sb23, (s >>= 16) & 0xffff);
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l ^= SBA(sb01, (s >>= 16) & 0xffff);
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l ^= SBA(sb01, (s >>= 16) );
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s = *k++ ^ l;
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r ^= SBA(sb23, (s ) & 0xffff);
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r ^= SBA(sb23, (s >>= 16) & 0xffff);
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r ^= SBA(sb01, (s >>= 16) & 0xffff);
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r ^= SBA(sb01, (s >>= 16) );
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}
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s=l; l=r; r=s;
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}
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res[0] = l >> 32; res[1] = l & 0xffffffff;
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res[2] = r >> 32; res[3] = r & 0xffffffff;
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}
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#endif
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