/* -*-c-*-
*
- * $Id: dsa.h,v 1.4 1999/12/22 15:52:44 mdw Exp $
+ * $Id: dsa.h,v 1.9 2004/04/08 01:36:15 mdw Exp $
*
* Digital Signature Algorithm
*
* (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: dsa.h,v $
- * Revision 1.4 1999/12/22 15:52:44 mdw
- * Reworking for new prime-search system.
- *
- * Revision 1.3 1999/12/10 23:29:48 mdw
- * Change header file guard names.
- *
- * Revision 1.2 1999/11/20 22:23:48 mdw
- * Allow event handler to abort the search process.
- *
- * Revision 1.1 1999/11/19 19:28:00 mdw
- * Implementation of the Digital Signature Algorithm.
- *
- */
-
#ifndef CATACOMB_DSA_H
#define CATACOMB_DSA_H
/*----- Header files ------------------------------------------------------*/
+#ifndef CATACOMB_DH_H
+# include "dh.h"
+#endif
+
+#ifndef CATACOMB_KEY_H
+# include "key.h"
+#endif
+
+#ifndef CATACOMB_KEYCHECK_H
+# include "keycheck.h"
+#endif
+
#ifndef CATACOMB_MP_H
# include "mp.h"
#endif
-
+
#ifndef CATACOMB_PGEN_H
# include "pgen.h"
#endif
/*----- Data structures ---------------------------------------------------*/
-/* --- DSA parameter structure --- *
- *
- * These parameters can, and probably should, be shared among a group of
- * users.
- */
+/* --- The parameters and keys are the same as for Diffie-Hellman --- */
-typedef struct dsa_param {
- mp *p, *q; /* Prime numbers %$p$% and %$q$% */
- mp *g; /* Generates order-%$q$% subgroup */
-} dsa_param;
+typedef dh_param dsa_param;
+typedef dh_pub dsa_pub;
+typedef dh_priv dsa_priv;
+
+/* --- DSA key seed structure --- */
+
+typedef struct dsa_seed {
+ void *p; /* Pointer to seed material */
+ size_t sz; /* Size of seed material */
+ unsigned count; /* Iterations to find @p@ */
+} dsa_seed;
/* --- DSA signature structure --- *
*
octet s[DSA_SIGLEN]; /* 160-bit @s@ value */
} dsa_sig;
+/*----- Key fetching ------------------------------------------------------*/
+
+#define dsa_paramfetch dh_paramfetch
+#define dsa_pubfetch dh_pubfetch
+#define dsa_privfetch dh_privfetch
+
+#define DSA_PARAMFETCHSZ DH_PARAMFETCHSZ
+#define DSA_PUBFETCHSZ DH_PUBFETCHSZ
+#define DSA_PRIVFETCHSZ DH_PRIVFETCHSZ
+
+#define dsa_paramfree dh_paramfree
+#define dsa_pubfree dh_pubfree
+#define dsa_privfree dh_privfree
+
/*----- DSA stepper -------------------------------------------------------*/
typedef struct dsa_stepctx {
mp *q; /* Force @p@ to be a multiple */
size_t bits; /* Number of bits in the result */
unsigned or; /* OR mask for low order bits */
+ unsigned count; /* Counts the number of steps made */
+ void *seedbuf; /* Pointer to seed buffer */
} dsa_stepctx;
/* --- @dsa_step@ --- *
* divisibility by small primes.
*/
-extern int dsa_step(int /*rq*/, pgen_event */*ev*/, void */*p*/);
+extern pgen_proc dsa_step;
/*----- Functions provided ------------------------------------------------*/
-/* --- @dsa_seed@ --- *
+/* --- @dsa_gen@ --- *
*
* Arguments: @dsa_param *dp@ = where to store parameters
* @unsigned ql@ = length of @q@ in bits
* @unsigned steps@ = number of steps to find @q@
* @const void *k@ = pointer to key material
* @size_t sz@ = size of key material
+ * @dsa_seed *sd@ = optional pointer for output seed information
* @pgen_proc *event@ = event handler function
* @void *ectx@ = argument for event handler
*
* %$l$%. Neither limitation applies to this implementation.
*/
-extern int dsa_seed(dsa_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
- unsigned /*steps*/, const void */*k*/, size_t /*sz*/,
- pgen_proc */*event*/, void */*ectx*/);
+extern int dsa_gen(dsa_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
+ unsigned /*steps*/, const void */*k*/, size_t /*sz*/,
+ dsa_seed */*sd*/, pgen_proc */*event*/, void */*ectx*/);
+
+/* --- @dsa_checkparam@ --- *
+ *
+ * Arguments: @keycheck *kc@ = keycheck state
+ * @const dsa_param *dp@ = pointer to the parameter set
+ * @const dsa_seed *ds@ = pointer to seed information
+ *
+ * Returns: Zero if all OK, or return status from function.
+ *
+ * Use: Checks a set of DSA parameters for consistency and security.
+ */
+
+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@ --- *
*
*/
extern int dsa_verify(const dsa_param */*dp*/, mp */*y*/,
- const void */*m*/, size_t /*msz*/,
- const void */*r*/, size_t /*rsz*/,
- const void */*s*/, size_t /*ssz*/);
+ const void */*m*/, size_t /*msz*/,
+ const void */*r*/, size_t /*rsz*/,
+ const void */*s*/, size_t /*ssz*/);
/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / blobdiff