/* -*-c-*-
*
- * $Id: dh.h,v 1.8 2004/04/01 12:50:09 mdw Exp $
+ * $Id$
*
* Diffie-Hellman and related public-key systems
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: dh.h,v $
- * Revision 1.8 2004/04/01 12:50:09 mdw
- * Add cyclic group abstraction, with test code. Separate off exponentation
- * functions for better static linking. Fix a buttload of bugs on the way.
- * Generally ensure that negative exponents do inversion correctly. Add
- * table of standard prime-field subgroups. (Binary field subgroups are
- * currently unimplemented but easy to add if anyone ever finds a good one.)
- *
- * Revision 1.7 2001/02/03 16:08:24 mdw
- * Add consistency checking for public keys.
- *
- * Revision 1.6 2000/07/29 10:01:16 mdw
- * Supply commentry for the Diffie-Hellman parameters. Add Lim-Lee
- * parameter generation.
- *
- * Revision 1.5 2000/07/01 11:20:51 mdw
- * New functions for freeing public and private keys.
- *
- * Revision 1.4 2000/06/17 10:52:47 mdw
- * Minor changes for key fetching.
- *
- * Revision 1.3 2000/02/12 18:21:02 mdw
- * Overhaul of key management (again).
- *
- */
-
#ifndef CATACOMB_DH_H
#define CATACOMB_DH_H
pgen_proc */*oev*/, void */*oec*/, pgen_proc */*iev*/,
void */*iec*/, size_t */*nf*/, mp ***/*f*/);
+/* --- @dh_kcdsagen@ --- *
+ *
+ * Arguments: @dh_param *dp@ = pointer to output parameter block
+ * @unsigned ql@ = size of small factor of %$(p - 1)/2$%
+ * @unsigned pl@ = size of %$p$% in bits
+ * @unsigned flags@ = other generation flags (none defined)
+ * @unsigned steps@ = number of steps to go
+ * @grand *r@ = random number source
+ * @pgen_proc *ev@ = event handler function
+ * @void *ec@ = context for the event handler
+ *
+ * Returns: @PGEN_DONE@ if it worked, @PGEN_ABORT@ if it failed.
+ *
+ * Use: Generates a KCDSA prime group. That is, it chooses a prime
+ * %$p$%, such that $%p = 2 q v + 1$%, for primes %$q$% and
+ * %$v$%. The actual group of interest is the subgroup of order
+ * %$q$%.
+ */
+
+extern int dh_kcdsagen(dh_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
+ unsigned /*flags*/, unsigned /*steps*/, grand */*r*/,
+ pgen_proc */*ev*/, void */*ec*/);
+
/* --- @dh_checkparam@ --- *
*
* Arguments: @keycheck *kc@ = keycheck state
extern int dh_checkparam(keycheck */*kc*/, const dh_param */*dp*/,
mp **/*v*/, size_t /*n*/);
-/* --- @dh_parse@ --- *
+/* ---- @dh_infofromdata@ --- *
+ *
+ * Arguments: @dh_param *dp@ = parameters to fill in
+ * @pdata *pd@ = packed data structure
+ *
+ * Returns: ---
+ *
+ * Use: Fills in a parameters structure from a packed data block.
+ */
+
+struct pdata;
+extern void dh_infofromdata(dh_param */*dp*/, struct pdata */*pd*/);
+
+/* --- @dh_parse@, @dhbin_parse@ --- *
*
* Arguments: @qd_parse *qd@ = parser context
* @dh_param *dp@ = parameters to fill in
*
* Returns: Zero if OK, nonzero on error.
*
- * Use: Parses a prime group string. This is either one of the
- * standard group strings, or a %$p$%, %$q$%, %$g$% triple
+ * Use: Parses a prime/binary group string. This is either one of
+ * the standard group strings, or a %$p$%, %$q$%, %$g$% triple
* separated by commas.
*/
extern int dh_parse(qd_parse */*qd*/, dh_param */*dp*/);
+extern int dhbin_parse(qd_parse */*qd*/, gbin_param */*gb*/);
/*----- That's all, folks -------------------------------------------------*/