3 * Key consistency checking tools for large integers
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 /*----- Header files ------------------------------------------------------*/
30 #include <mLib/dstr.h>
42 /*----- Main code ---------------------------------------------------------*/
44 /* --- @keycheck_prime@ --- *
46 * Arguments: @keycheck *kc@ = keycheck state
47 * @unsigned sev@ = severity if not prime
48 * @mp *m@ = a number to check for primality
49 * @const char *name@ = name of this number
51 * Returns: Zero if OK, or return status from function.
53 * Use: Checks that a number is prime.
56 int keycheck_prime(keycheck
*kc
, unsigned sev
, mp
*m
, const char *name
)
60 rc
= pfilt_smallfactor(m
);
63 grand
*r
= fibrand_create(0);
67 r
->ops
->misc(r
, GRAND_SEEDRAND
, &rand_global
);
68 n
= rabin_iters(mp_bits(m
));
71 x
= mprand_range(x
, m
, r
, 0);
72 rc
= rabin_test(&rn
, x
);
74 } while (n
&& rc
== PGEN_PASS
);
82 rc
= keycheck_report(kc
, sev
, "%s not prime", name
);
86 /*----- That's all, folks -------------------------------------------------*/