X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ef5f48103e83977bda6ef4d7d1aacbb66a629b10..20fa0f6976d598481208c0583d72b2ccef637be9:/dsa-sign.c

diff --git a/dsa-sign.c b/dsa-sign.c
index 613a07e..9d30dd9 100644
--- a/dsa-sign.c
+++ b/dsa-sign.c
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: dsa-sign.c,v 1.2 1999/12/10 23:18:38 mdw Exp $
+ * $Id: dsa-sign.c,v 1.3 2004/04/08 01:36:15 mdw Exp $
  *
  * DSA signing operation
  *
  * (c) 1999 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,29 +15,18 @@
  * 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: dsa-sign.c,v $
- * Revision 1.2  1999/12/10 23:18:38  mdw
- * Change interface for suggested destinations.
- *
- * Revision 1.1  1999/11/19 19:28:00  mdw
- * Implementation of the Digital Signature Algorithm.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "dsa.h"
@@ -64,7 +53,7 @@ void dsa_mksig(const dsa_param *dp, mp *a, mp *m, mp *k, mp **rr, mp **ss)
 {
   mpmont pm;
   mpbarrett qb;
-  mp *k1 = MP_NEW, *r;
+  mp *k1, *r;
   mp *ar;
 
   /* --- Compute %$r = (g^k \bmod p) \bmod q$% --- */
@@ -76,7 +65,7 @@ void dsa_mksig(const dsa_param *dp, mp *a, mp *m, mp *k, mp **rr, mp **ss)
 
   /* --- Compute %$k^{-1} \bmod q$% --- */
 
-  mp_gcd(0, 0, &k1, dp->q, k);
+  k1 = mp_modinv(MP_NEW, k, dp->q);
 
   /* --- Now for %$k^{-1}(m + ar)$% --- */
 
@@ -117,7 +106,7 @@ void dsa_sign(dsa_param *dp, mp *a,
 	      const void *m, size_t msz, const void *k, size_t ksz,
 	      void *r, size_t rsz, void *s, size_t ssz)
 {
-  mp *mm = mp_loadb(MP_NEW, m, msz);
+  mp *mm = dsa_h2n(MP_NEW, dp->q, m, msz);
   mp *km = mp_loadb(MP_NEW, k, ksz);
   mp *rm = MP_NEW, *sm = MP_NEW;
   dsa_mksig(dp, a, mm, km, &rm, &sm);
@@ -179,7 +168,7 @@ static int verify(dstr *v)
       fputs("\ns = ", stderr); mp_writefile(m, stderr, 16);
       mp_drop(m);
     }
-      
+
     fputc('\n', stderr);
     ok = 0;
   }