/* -*-c-*-
*
- * $Id: gkcdsa.c,v 1.1 2004/04/04 19:42:59 mdw Exp $
+ * $Id$
*
* Generalized version of KCDSA
*
* (c) 2004 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: gkcdsa.c,v $
- * Revision 1.1 2004/04/04 19:42:59 mdw
- * Add set -e.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include "gkcdsa.h"
/*----- Main code ---------------------------------------------------------*/
-/* --- @gdsa_beginhash@ --- *
+/* --- @gkcdsa_beginhash@ --- *
*
- * Arguments: @const gdsa *c@ = pointer to the context structure
+ * Arguments: @const gkcdsa *c@ = pointer to the context structure
*
* Returns: A hashing context for you to hash the message.
*
mp *v = G_TOINT(c->g, MP_NEW, c->p);
size_t sz = c->h->bufsz;
void *p = xmalloc(sz);
-
if (/*ouch*/ !v) memset(p, 0, sz);
else mp_storeb(v, p, sz);
GH_HASH(h, p, sz);
* Returns: ---
*
* Use: Does any final thing that KCDSA wants to do when hashing a
- * message. (Actually, there's nothing.) The hashing context
+ * message. (Actually, there's nothing.) The hashing context
* isn't finalized.
*/
-void gkcdsa_endhash(gkcdsa *c, ghash *h) { ; }
+void gkcdsa_endhash(const gkcdsa *c, ghash *h) { ; }
/* --- @hashge@ --- *
*
new_k:
k = mprand_range(k, g->r, c->r, 0);
have_k:
- if (MP_ISZERO(k)) goto new_k;
+ if (MP_ZEROP(k)) goto new_k;
G_EXP(g, z, g->g, k);
if (!s->r) s->r = xmalloc(hsz);
h = hashge(g, c->h, z); GH_DONE(h, s->r);
}
static void showmp(const char *p, mp *x, int r) {
- fprintf(stderr, "*** %s = ", p); mp_writefile(x, stderr, r);
+ fprintf(stderr, "*** %s = ", p); mp_writefile(x, stderr, r);
putc('\n', stderr);
}
DENSURE(&d, c.h->hashsz); d.len = c.h->hashsz; memset(d.buf, 0, d.len);
ss.r = (octet *)d.buf;
- x = MP_NEW; mp_gcd(0, 0, &x, c.g->r, c.u);
+ x = mp_modinv(MP_NEW, c.u, c.g->r);
c.p = G_CREATE(c.g); G_EXP(c.g, c.p, c.g->g, x);
h = gkcdsa_beginhash(&c);
GH_HASH(h, v[3].buf, v[3].len);