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CRYPT
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CRYPT.C
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1997-04-01
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/*
* UFC-crypt: ultra fast crypt(3) implementation
*
* Copyright (C) 1991, 1992, Michael Glad, email: glad@daimi.aau.dk
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* @(#)crypt.c 2.14 01/23/92
*
* Semiportable C version
*
*/
#include "ufc-crypt.h"
extern ufc_long *ufc_dofinalperm(ufc_long, ufc_long, ufc_long, ufc_long);
ufc_long *ufc_doit (ufc_long, ufc_long, ufc_long,
ufc_long, ufc_long);
/*
* 32 bit version
*/
#ifdef _UFC_32_
extern long32 ufc_keytab[16][2];
extern long32 ufc_sb0[], ufc_sb1[], ufc_sb2[], ufc_sb3[];
#define SBA(sb, v) (*(long32*)((char*)(sb)+(v)))
#ifdef __STDC__
ufc_long *ufc_doit(ufc_long l1, ufc_long l2, ufc_long r1,
ufc_long r2,ufc_long itr)
#else
ufc_long *ufc_doit(l1, l2, r1, r2, itr)
ufc_long l1, l2, r1, r2, itr;
#endif
{
int i;
long32 s, *k;
while(itr--) {
k = &ufc_keytab[0][0];
for(i=8; i--; ) {
s = *k++ ^ r1;
l1 ^= SBA(ufc_sb1, s & 0xffff); l2 ^= SBA(ufc_sb1, (s & 0xffff) + 4);
l1 ^= SBA(ufc_sb0, s >>= 16); l2 ^= SBA(ufc_sb0, (s) + 4);
s = *k++ ^ r2;
l1 ^= SBA(ufc_sb3, s & 0xffff); l2 ^= SBA(ufc_sb3, (s & 0xffff) + 4);
l1 ^= SBA(ufc_sb2, s >>= 16); l2 ^= SBA(ufc_sb2, (s) + 4);
s = *k++ ^ l1;
r1 ^= SBA(ufc_sb1, s & 0xffff); r2 ^= SBA(ufc_sb1, (s & 0xffff) + 4);
r1 ^= SBA(ufc_sb0, s >>= 16); r2 ^= SBA(ufc_sb0, (s) + 4);
s = *k++ ^ l2;
r1 ^= SBA(ufc_sb3, s & 0xffff); r2 ^= SBA(ufc_sb3, (s & 0xffff) + 4);
r1 ^= SBA(ufc_sb2, s >>= 16); r2 ^= SBA(ufc_sb2, (s) + 4);
}
s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
}
return ufc_dofinalperm(l1, l2, r1, r2);
}
#endif
#ifdef _UFC_64_
/*
* 64 bit version
*/
extern long64 ufc_keytab[16];
extern long64 ufc_sb0[], ufc_sb1[], ufc_sb2[], ufc_sb3[];
#ifdef cray
#define SBA(sb, v) (*(long64*)((long64)(sb)+(v)))
#else
#define SBA(sb, v) (*(long64*)((char*)(sb)+(v)))
#endif
#ifdef __STDC__
ufc_long *
ufc_doit(ufc_long l1, ufc_long l2, ufc_long r1, ufc_long r2, ufc_long itr)
#else
ufc_long *ufc_doit(l1, l2, r1, r2, itr)
ufc_long l1, l2, r1, r2, itr;
#endif
{
int i;
long64 l, r, s, *k;
l = (((long64)l1) << 32) | ((long64)l2);
r = (((long64)r1) << 32) | ((long64)r2);
while(itr--) {
k = &ufc_keytab[0];
for(i=8; i--; ) {
s = *k++ ^ r;
l ^= SBA(ufc_sb3, (s >> 0) & 0xffff);
l ^= SBA(ufc_sb2, (s >> 16) & 0xffff);
l ^= SBA(ufc_sb1, (s >> 32) & 0xffff);
l ^= SBA(ufc_sb0, (s >> 48) & 0xffff);
s = *k++ ^ l;
r ^= SBA(ufc_sb3, (s >> 0) & 0xffff);
r ^= SBA(ufc_sb2, (s >> 16) & 0xffff);
r ^= SBA(ufc_sb1, (s >> 32) & 0xffff);
r ^= SBA(ufc_sb0, (s >> 48) & 0xffff);
}
s=l; l=r; r=s;
}
l1 = l >> 32; l2 = l & 0xffffffff;
r1 = r >> 32; r2 = r & 0xffffffff;
return ufc_dofinalperm(l1, l2, r1, r2);
}
#endif