+++ /dev/null
-/* -*-c-*-
- *
- * $Id: limlee.h,v 1.5 2004/04/08 01:36:15 mdw Exp $
- *
- * Generate Lim-Lee primes
- *
- * (c) 2000 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_LIMLEE_H
-#define CATACOMB_LIMLEE_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#ifndef CATACOMB_GRAND_H
-# include "grand.h"
-#endif
-
-#ifndef CATACOMB_MP_H
-# include "mp.h"
-#endif
-
-#ifndef CATACOMB_PGEN_H
-# include "pgen.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct limlee_factor {
- mp *p; /* The actual prime */
- unsigned tag; /* A tag, usable by the generator */
- void *more; /* Pointer to more data */
-} limlee_factor;
-
-typedef struct limlee_stepctx {
-
- /* --- To be initialized by the caller --- */
-
- unsigned f; /* Various useful flags */
- mp *newp; /* Initial valid for new primes */
- unsigned ql, pl; /* Size of factors and result */
- const struct limlee_primeops *pops; /* Pointer to generator ops */
- void *pc; /* Context ptr for generator ops */
- pgen_proc *iev; /* Event handler for inner @pgen@ */
- void *iec; /* Context for inner @pgen@ */
- grand *r; /* Random number generator */
-
- /* --- Output values --- */
-
- size_t nf; /* Number of factors wanted */
- limlee_factor *v; /* Vector of factors */
-
- /* --- Maintained internally --- */
-
- octet *c; /* Combination byte-flag vector */
- unsigned long seq; /* Sequence number for primes */
- size_t poolsz; /* Size of the small-prime pool */
- dstr d; /* String for subprime name */
- limlee_factor qq; /* Big prime to pick up slack */
-
-} limlee_stepctx;
-
-typedef struct limlee_primeops {
- void (*pgen)(limlee_factor */*f*/, unsigned /*pl*/, limlee_stepctx */*l*/);
- void (*pfree)(limlee_factor */*f*/, limlee_stepctx */*l*/);
-} limlee_primeops;
-
-/* --- Flags --- */
-
-#define LIMLEE_KEEPFACTORS 1u
-
-/*----- The Lim-Lee stepper function --------------------------------------*/
-
-extern pgen_proc limlee_step;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @limlee@ --- *
- *
- * Arguments: @const char *name@ = pointer to name root
- * @mp *d@ = pointer to destination integer
- * @mp *newp@ = how to generate factor primes
- * @unsigned ql@ = size of individual factors
- * @unsigned pl@ = size of large prime
- * @grand *r@ = a random number source
- * @unsigned on@ = number of outer attempts to make
- * @pgen_proc *oev@ = outer event handler function
- * @void *oec@ = argument for the outer event handler
- * @pgen_proc *iev@ = inner event handler function
- * @void *iec@ = argument for the inner event handler
- * @size_t *nf@, @mp ***f@ = output array for factors
- *
- * Returns: A Lim-Lee prime, or null if generation failed.
- *
- * Use: Generates Lim-Lee primes. A Lim-Lee prime %$p$% is one which
- * satisfies %$p = 2 \prod_i q_i + 1$%, where all of the %$q_i$%
- * are large enough to resist square-root discrete log
- * algorithms.
- *
- * If we succeed, and @f@ is non-null, we write the array of
- * factors chosen to @f@ for the benefit of the caller.
- */
-
-extern mp *limlee(const char */*name*/, mp */*d*/, mp */*newp*/,
- unsigned /*ql*/, unsigned /*pl*/, grand */*r*/,
- unsigned /*on*/, pgen_proc */*oev*/, void */*oec*/,
- pgen_proc */*iev*/, void */*iec*/,
- size_t */*nf*/, mp ***/*f*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif
~mdw / catacomb / blobdiff