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Aminet 19 (1997)(GTI - Schatztruhe)[!][Jun 1997].iso
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Crak.lha
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crypt.c
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C/C++ Source or Header
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1997-02-28
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113 lines
/*
* UFC-crypt: ultra fast crypt(3) implementation
*
* Copyright (C) 1991, 1992, Free Software Foundation, Inc.
*
* 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 2.17 2/22/92
*
* Semiportable C version
*
*/
#include "ufc-crypt.h"
extern ufc_long *_ufc_dofinalperm();
#ifdef _UFC_32_
/*
* 32 bit version
*/
extern long32 _ufc_keytab[16][2];
extern long32 _ufc_sb0[], _ufc_sb1[], _ufc_sb2[], _ufc_sb3[];
#define SBA(sb, v) (*(long32*)((char*)(sb)+(v)))
ufc_long *_ufc_doit(l1, l2, r1, r2, itr)
ufc_long l1, l2, r1, r2, itr;
{ 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[];
#define SBA(sb, v) (*(long64*)((char*)(sb)+(v)))
ufc_long *_ufc_doit(l1, l2, r1, r2, itr)
ufc_long l1, l2, r1, r2, itr;
{ 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