3 * $Id: keycheck-mp.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
5 * Key consistency checking tools for large integers
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Header files ------------------------------------------------------*/
32 #include <mLib/dstr.h>
44 /*----- Main code ---------------------------------------------------------*/
46 /* --- @keycheck_prime@ --- *
48 * Arguments: @keycheck *kc@ = keycheck state
49 * @unsigned sev@ = severity if not prime
50 * @mp *m@ = a number to check for primality
51 * @const char *name@ = name of this number
53 * Returns: Zero if OK, or return status from function.
55 * Use: Checks that a number is prime.
58 int keycheck_prime(keycheck
*kc
, unsigned sev
, mp
*m
, const char *name
)
62 rc
= pfilt_smallfactor(m
);
65 grand
*r
= fibrand_create(0);
69 r
->ops
->misc(r
, GRAND_SEEDRAND
, &rand_global
);
70 n
= rabin_iters(mp_bits(m
));
73 x
= mprand_range(x
, m
, r
, 0);
74 rc
= rabin_test(&rn
, x
);
76 } while (n
&& rc
== PGEN_PASS
);
84 rc
= keycheck_report(kc
, sev
, "%s not prime", name
);
88 /*----- That's all, folks -------------------------------------------------*/