[u/mdw/catacomb] / dh-param.c

/* -*-c-*-
 *
 * $Id: dh-param.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
 *
 * Reading Diffie-Hellman parameters
 *
 * (c) 2004 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.
 */

/*----- Header files ------------------------------------------------------*/

#include "dh.h"
#include "ptab.h"

/*----- Main code ---------------------------------------------------------*/

/* --- @dh_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
 *		separated by commas.
 */

static void getinfo(dh_param *dp, pdata *pd)
  { dp->p = &pd->p; dp->q = &pd->q; dp->g = &pd->g; }

int dh_parse(qd_parse *qd, dh_param *dp)
{
  mp *p = MP_NEW, *q = MP_NEW, *g = MP_NEW;
  const pentry *pe;

  for (pe = ptab; pe->name; pe++) {
    if (qd_enum(qd, pe->name) >= 0) {
      getinfo(dp, pe->data);
      goto found;
    }
  }
  if ((p = qd_getmp(qd)) == 0) goto fail;
  qd_delim(qd, ','); if ((q = qd_getmp(qd)) == 0) goto fail;
  qd_delim(qd, ','); if ((g = qd_getmp(qd)) == 0) goto fail;
  dp->p = p; dp->q = q; dp->g = g;
found:
  return (0);

fail:
  mp_drop(p); mp_drop(q); mp_drop(g);
  return (-1);
}

/*----- Test rig ----------------------------------------------------------*/

#ifdef TEST_RIG

#include "fibrand.h"

int main(void)
{
  const pentry *pe;
  const char *e;
  int ok = 1;
  grand *gr;

  gr = fibrand_create(0);
  fputs("checking standard prime fields: ", stdout);
  for (pe = ptab; pe->name; pe++) {
    dh_param dp;
    group *g;
    getinfo(&dp, pe->data);
    g = group_prime(&dp);
    e = G_CHECK(g, gr);
    G_DESTROYGROUP(g);
    dh_paramfree(&dp);
    if (e) {
      fprintf(stderr, "\n*** group %s fails: %s\n", pe->name, e);
      ok = 0;
    }
    putchar('.');
    fflush(stdout);
  }
  gr->ops->destroy(gr);
  fputs(ok ? " ok\n" : " failed\n", stdout);
  return (!ok);
}

#endif

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
34e4f738	1	/* --c--
34e4f738	2	*
b817bfc6	3	* $Id: dh-param.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
34e4f738	4	*
	5	* Reading Diffie-Hellman parameters
	6	*
	7	* (c) 2004 Straylight/Edgeware
	8	*/
	9
	10	/----- Licensing notice --------------------------------------------------
	11	*
	12	* This file is part of Catacomb.
	13	*
	14	* Catacomb is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU Library General Public License as
	16	* published by the Free Software Foundation; either version 2 of the
	17	* License, or (at your option) any later version.
	18	*
	19	* Catacomb is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU Library General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU Library General Public
	25	* License along with Catacomb; if not, write to the Free
	26	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
	27	* MA 02111-1307, USA.
	28	*/
	29
34e4f738	30	/----- Header files ------------------------------------------------------/
	31
	32	#include "dh.h"
	33	#include "ptab.h"
	34
	35	/----- Main code ---------------------------------------------------------/
	36
	37	/* --- @dh_parse@ --- *
	38	*
	39	* Arguments: @qd_parse *qd@ = parser context
	40	* @dh_param *dp@ = parameters to fill in
	41	*
	42	* Returns: Zero if OK, nonzero on error.
	43	*
	44	* Use: Parses a prime group string. This is either one of the
	45	* standard group strings, or a %$p$%, %$q$%, %$g$% triple
	46	* separated by commas.
	47	*/
	48
	49	static void getinfo(dh_param dp, pdata pd)
	50	{ dp->p = &pd->p; dp->q = &pd->q; dp->g = &pd->g; }
	51
	52	int dh_parse(qd_parse qd, dh_param dp)
	53	{
	54	mp p = MP_NEW, q = MP_NEW, *g = MP_NEW;
	55	const pentry *pe;
	56
	57	for (pe = ptab; pe->name; pe++) {
	58	if (qd_enum(qd, pe->name) >= 0) {
	59	getinfo(dp, pe->data);
	60	goto found;
	61	}
	62	}
	63	if ((p = qd_getmp(qd)) == 0) goto fail;
	64	qd_delim(qd, ','); if ((q = qd_getmp(qd)) == 0) goto fail;
	65	qd_delim(qd, ','); if ((g = qd_getmp(qd)) == 0) goto fail;
	66	dp->p = p; dp->q = q; dp->g = g;
	67	found:
	68	return (0);
	69
	70	fail:
	71	mp_drop(p); mp_drop(q); mp_drop(g);
	72	return (-1);
	73	}
	74
	75	/----- Test rig ----------------------------------------------------------/
	76
	77	#ifdef TEST_RIG
	78
	79	#include "fibrand.h"
	80
	81	int main(void)
	82	{
	83	const pentry *pe;
	84	const char *e;
	85	int ok = 1;
	86	grand *gr;
	87
	88	gr = fibrand_create(0);
	89	fputs("checking standard prime fields: ", stdout);
	90	for (pe = ptab; pe->name; pe++) {
	91	dh_param dp;
	92	group *g;
	93	getinfo(&dp, pe->data);
94	g = group_prime(&dp);
95	e = G_CHECK(g, gr);
96	G_DESTROYGROUP(g);
97	dh_paramfree(&dp);
98	if (e) {
99	fprintf(stderr, "\n*** group %s fails: %s\n", pe->name, e);
100	ok = 0;
101	}
102	putchar('.');
103	fflush(stdout);
104	}
105	gr->ops->destroy(gr);
106	fputs(ok ? " ok\n" : " failed\n", stdout);
107	return (!ok);
108	}
109
110	#endif
111
112	/----- That's all, folks -------------------------------------------------/