include/beecrypt/dldp.h

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/*
 * Copyright (c) 2000, 2001, 2002 X-Way Rights BV
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef _DLDP_H
#define _DLDP_H

#include "beecrypt/mpbarrett.h"

/*
 * Discrete Logarithm Domain Parameters - Prime
 *
 * Standard definition where p = qr+1; in case where p=2q+1, r=2
 *
 * In IEEE P1363 naming is p = rk+1
 *
 * Hence, IEEE prime r = q and cofactor k = r
 *
 * Make sure q is large enough to foil Pohlig-Hellman attacks
 *  See: "Handbook of Applied Cryptography", Chapter 3.6.4
 *
 * g is either a generator of a subgroup of order q, or a generator of order
 *  n = (p-1)
 */

#ifdef __cplusplus
struct BEECRYPTAPI dldp_p
#else
struct _dldp_p
#endif
{
    mpbarrett p;
    mpbarrett q;
    mpnumber r;
    mpnumber g;
    mpbarrett n;
#ifdef __cplusplus
    dldp_p();
    dldp_p(const dldp_p&);
    ~dldp_p();
#endif
};

#ifndef __cplusplus
typedef struct _dldp_p dldp_p;
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Functions for setting up and copying
 */

BEECRYPTAPI
int dldp_pInit(dldp_p*);
BEECRYPTAPI
int dldp_pFree(dldp_p*);
BEECRYPTAPI
int dldp_pCopy(dldp_p*, const dldp_p*);

/*
 * Functions for generating keys
 */

BEECRYPTAPI
int dldp_pPrivate  (const dldp_p*, randomGeneratorContext*, mpnumber*);
BEECRYPTAPI
int dldp_pPrivate_s(const dldp_p*, randomGeneratorContext*, mpnumber*, size_t);
BEECRYPTAPI
int dldp_pPublic   (const dldp_p*, const mpnumber*, mpnumber*);
BEECRYPTAPI
int dldp_pPair     (const dldp_p*, randomGeneratorContext*, mpnumber* x, mpnumber* y);
BEECRYPTAPI
int dldp_pPair_s   (const dldp_p*, randomGeneratorContext*, mpnumber* x, mpnumber* y, size_t);

/*
 * Function for comparing domain parameters
 */

BEECRYPTAPI
int  dldp_pEqual  (const dldp_p*, const dldp_p*);

/*
 * Functions for generating and validating dldp_pgoq variant domain parameters
 */

BEECRYPTAPI
int dldp_pgoqMake     (dldp_p*, randomGeneratorContext*, size_t, size_t, int);
BEECRYPTAPI
int dldp_pgoqMakeSafe (dldp_p*, randomGeneratorContext*, size_t);
BEECRYPTAPI
int dldp_pgoqGenerator(dldp_p*, randomGeneratorContext*);
BEECRYPTAPI
int  dldp_pgoqValidate (const dldp_p*, randomGeneratorContext*, int);

/*
 * Functions for generating and validating dldp_pgon variant domain parameters
 */

BEECRYPTAPI
int dldp_pgonMake     (dldp_p*, randomGeneratorContext*, size_t, size_t);
BEECRYPTAPI
int dldp_pgonMakeSafe (dldp_p*, randomGeneratorContext*, size_t);
BEECRYPTAPI
int dldp_pgonGenerator(dldp_p*, randomGeneratorContext*);
BEECRYPTAPI
int dldp_pgonValidate (const dldp_p*, randomGeneratorContext*);

#ifdef __cplusplus
}
#endif

#endif

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