X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ff07f5436fde82aa2046965308d3f9d98333bda3..043613346cc5a0a99ad54781212bf7fd2c62c415:/limlee.h diff --git a/limlee.h b/limlee.h new file mode 100644 index 0000000..d6fcc4b --- /dev/null +++ b/limlee.h @@ -0,0 +1,99 @@ +/* -*-c-*- + * + * $Id: limlee.h,v 1.1 2000/07/09 21:30:58 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. + */ + +/*----- Revision history --------------------------------------------------* + * + * $Log: limlee.h,v $ + * Revision 1.1 2000/07/09 21:30:58 mdw + * Lim-Lee prime generation. + * + */ + +#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 + +/*----- 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