/* -*-c-*-
*
- * $Id: bbs-rand.c,v 1.3 2000/06/17 10:45:21 mdw Exp $
+ * $Id$
*
* Blum-Blum-Shub secure random number generator
*
* (c) 1999 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* 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.
- *
+ *
* Catacomb 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 Catacomb; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: bbs-rand.c,v $
- * Revision 1.3 2000/06/17 10:45:21 mdw
- * Typesetting fixes. Advertise random number generator strength. Use
- * secure arena for memory allocation.
- *
- * Revision 1.2 1999/12/13 15:34:01 mdw
- * Add support for seeding from a generic pseudorandom source.
- *
- * Revision 1.1 1999/12/10 23:14:59 mdw
- * Blum-Blum-Shub generator, and Blum-Goldwasser encryption.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include <stdarg.h>
void bbs_set(bbs *b, mp *x)
{
- if (b->x)
- mp_drop(b->x);
+ mp_drop(b->x);
b->x = MP_COPY(x);
bbs_step(b);
}
switch (op) {
case GRAND_CHECK:
switch (va_arg(ap, unsigned)) {
- case GRAND_CHECK:
- case GRAND_SEEDINT:
- case GRAND_SEEDUINT32:
- case GRAND_SEEDMP:
+ case GRAND_CHECK:
+ case GRAND_SEEDINT:
+ case GRAND_SEEDUINT32:
+ case GRAND_SEEDMP:
case GRAND_SEEDRAND:
case BBS_SET:
- rc = 1;
- break;
- default:
- rc = 0;
- break;
+ case BBS_STEP:
+ case BBS_STEPSZ:
+ case BBS_BITS:
+ case BBS_WRAP:
+ case BBS_FF:
+ case BBS_FFN:
+ case BBS_REW:
+ case BBS_REWN:
+ case BBS_MOD:
+ case BBS_STATE:
+ rc = 1;
+ break;
+ default:
+ rc = 0;
+ break;
}
break;
case GRAND_SEEDINT: {
case BBS_SET:
bbs_set(&g->b, va_arg(ap, mp *));
break;
+ case BBS_STEP:
+ bbs_step(&g->b);
+ break;
+ case BBS_STEPSZ:
+ rc = g->b.k;
+ break;
+ case BBS_BITS: {
+ unsigned nb = va_arg(ap, unsigned);
+ uint32 *w = va_arg(ap, uint32 *);
+ *w = bbs_bits(&g->b, nb);
+ } break;
+ case BBS_WRAP:
+ bbs_wrap(&g->b);
+ break;
+ case BBS_FF: {
+ const bbs_priv *bp = va_arg(ap, const bbs_priv *);
+ mp *n = va_arg(ap, mp *);
+ bbs_ff(&g->b, bp, n);
+ } break;
+ case BBS_FFN: {
+ const bbs_priv *bp = va_arg(ap, const bbs_priv *);
+ unsigned long n = va_arg(ap, unsigned long);
+ bbs_ffn(&g->b, bp, n);
+ } break;
+ case BBS_REW: {
+ const bbs_priv *bp = va_arg(ap, const bbs_priv *);
+ mp *n = va_arg(ap, mp *);
+ bbs_rew(&g->b, bp, n);
+ } break;
+ case BBS_REWN: {
+ const bbs_priv *bp = va_arg(ap, const bbs_priv *);
+ unsigned long n = va_arg(ap, unsigned long);
+ bbs_rewn(&g->b, bp, n);
+ } break;
+ case BBS_MOD: {
+ mp **n = va_arg(ap, mp **);
+ if (*n) MP_DROP(*n);
+ *n = MP_COPY(g->b.mb.m);
+ } break;
+ case BBS_STATE: {
+ mp **n = va_arg(ap, mp **);
+ if (*n) MP_DROP(*n);
+ *n = MP_COPY(g->b.x);
+ } break;
default:
GRAND_BADOP;
break;
/* --- @bbs_rand@ --- *
*
- * Arguments: @mp *m@ = modulus
+ * Arguments: @mp *m@ = modulus
* @mp *x@ = initial seed
*
- * Returns: Pointer to a generic generator.
+ * Returns: Pointer to a generic generator.
*
- * Use: Constructs a generic generator interface over a
+ * Use: Constructs a generic generator interface over a
* Blum-Blum-Shub generator.
*/