+++ /dev/null
-/* -*-c-*-
- *
- * $Id$
- *
- * Generalized version of DSA
- *
- * (c) 2004 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb 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.
- *
- * 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.
- */
-
-#ifndef CATACOMB_GDSA_H
-#define CATACOMB_GDSA_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#ifndef CATACOMB_GHASH_H
-# include "ghash.h"
-#endif
-
-#ifndef CATACOMB_GROUP_H
-# include "group.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-/* --- GDSA context --- *
- *
- * You don't need to fill in all of this stuff. See the description of the
- * function you want to use to find out what members are needed.
- */
-
-typedef struct gdsa {
- group *g; /* The group we work in */
- mp *u; /* Private key, for signing */
- ge *p; /* Public key, for verifying */
- grand *r; /* Random number source */
- const gchash *h; /* Hash function */
-} gdsa;
-
-/* --- GDSA signatures --- */
-
-typedef struct gdsa_sig { mp *r, *s; } gdsa_sig;
-#define GDSA_SIG_INIT { MP_NEW, MP_NEW }
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @gdsa_beginhash@ --- *
- *
- * Arguments: @const gdsa *c@ = pointer to the context structure
- *
- * Returns: A hashing context for you to hash the message.
- *
- * Use: Initializes a hash function correctly for you to hash a
- * message. Requires @h@.
- */
-
-extern ghash *gdsa_beginhash(const gdsa */*c*/);
-
-/* --- @gdsa_endhash@ --- *
- *
- * Arguments: @const gdsa *c@ = pointer to the context structure
- * @ghash *h@ = the hashing context
- *
- * Returns: ---
- *
- * Use: Does any final thing that DSA wants to do when hashing a
- * message. (Actually, there's nothing.) The hashing context
- * isn't finalized.
- */
-
-extern void gdsa_endhash(const gdsa */*c*/, ghash */*h*/);
-
-/* --- @gdsa_sign@ --- *
- *
- * Arguments: @const gdsa *c@ = my context structure
- * @gdsa_sig *s@ = where to put the signature (initialized)
- * @const void *m@ = pointer to message hash
- * @mp *k@ = random exponent for this message or null
- *
- * Returns: ---
- *
- * Use: Signs a message. Requires @g@, @u@, @h@, and @r@ if @k@ is
- * null. This is a better idea than inventing @k@ yourself.
- */
-
-extern void gdsa_sign(const gdsa */*c*/, gdsa_sig */*s*/,
- const void */*m*/, mp */*k*/);
-
-/* --- @gdsa_verify@ --- *
- *
- * Arguments: @const gdsa *c@ = my context structure
- * @const gdsa_sig *s@ = the signature to verify
- * @const void *m@ = pointer to message hash
- *
- * Returns: Zero if OK, negative on failure.
- *
- * Use: Checks a signature on a message, Requires @g@, @p@, @h@.
- */
-
-extern int gdsa_verify(const gdsa */*c*/, const gdsa_sig */*s*/,
- const void */*m*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif