X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ab6ce636633a45ab3b1046150b30aee43eca8d42..42ca150ce7fa024a8fd6a4c9433b613175270eb4:/dsa.h

diff --git a/dsa.h b/dsa.h
index 48ed07d..43ff845 100644
--- a/dsa.h
+++ b/dsa.h
@@ -7,7 +7,7 @@
  * (c) 1999 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,12 +15,12 @@
  * 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,
@@ -60,7 +60,7 @@
 #ifndef CATACOMB_MP_H
 #  include "mp.h"
 #endif
-    
+
 #ifndef CATACOMB_PGEN_H
 #  include "pgen.h"
 #endif
@@ -176,6 +176,22 @@ extern int dsa_gen(dsa_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
 extern int dsa_checkparam(keycheck */*kc*/, const dsa_param */*dp*/,
 			  const dsa_seed */*ds*/);
 
+/* --- @dsa_h2n@ --- *
+ *
+ * Arguments:	@mp *d@ = destination integer
+ *		@mp *r@ = order of the DSA group
+ *		@const void *h@ = pointer to message hash
+ *		@size_t hsz@ = size (in bytes) of the hash output
+ *
+ * Returns:	Resulting integer.
+ *
+ * Use:		Converts a hash to an integer in the demented way necessary
+ *		for DSA/ECDSA.  This is, of course, completely insane, but
+ *		there you go.
+ */
+
+extern mp *dsa_h2n(mp */*d*/, mp */*r*/, const void */*h*/, size_t /*hsz*/);
+
 /* --- @dsa_mksig@ --- *
  *
  * Arguments:	@const dsa_param *dp@ = pointer to DSA parameters