--- /dev/null
+/* -*-c-*-
+ *
+ * Key consistency checking tools for large integers
+ *
+ * (c) 2001 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 <mLib/dstr.h>
+
+#include "fibrand.h"
+#include "grand.h"
+#include "keycheck.h"
+#include "mp.h"
+#include "mprand.h"
+#include "pfilt.h"
+#include "pgen.h"
+#include "rabin.h"
+#include "rand.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @keycheck_prime@ --- *
+ *
+ * Arguments: @keycheck *kc@ = keycheck state
+ * @unsigned sev@ = severity if not prime
+ * @mp *m@ = a number to check for primality
+ * @const char *name@ = name of this number
+ *
+ * Returns: Zero if OK, or return status from function.
+ *
+ * Use: Checks that a number is prime.
+ */
+
+int keycheck_prime(keycheck *kc, unsigned sev, mp *m, const char *name)
+{
+ int rc;
+
+ rc = pfilt_smallfactor(m);
+ if (rc == PGEN_TRY) {
+ rabin rn;
+ grand *r = fibrand_create(0);
+ unsigned n;
+ mp *x = MP_NEW;
+
+ r->ops->misc(r, GRAND_SEEDRAND, &rand_global);
+ n = rabin_iters(mp_bits(m));
+ rabin_create(&rn, m);
+ do {
+ x = mprand_range(x, m, r, 0);
+ rc = rabin_test(&rn, x);
+ n--;
+ } while (n && rc == PGEN_PASS);
+ rabin_destroy(&rn);
+ mp_drop(x);
+ r->ops->destroy(r);
+ }
+ if (rc != PGEN_FAIL)
+ rc = 0;
+ else
+ rc = keycheck_report(kc, sev, "%s not prime", name);
+ return (rc);
+}
+
+/*----- That's all, folks -------------------------------------------------*/