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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /security/nss/lib/freebl/mpi/utils/identest.c
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'security/nss/lib/freebl/mpi/utils/identest.c')
-rw-r--r--security/nss/lib/freebl/mpi/utils/identest.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/utils/identest.c b/security/nss/lib/freebl/mpi/utils/identest.c
new file mode 100644
index 000000000..321d2c2b0
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/utils/identest.c
@@ -0,0 +1,84 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi.h"
+#include "mpprime.h"
+#include <sys/types.h>
+#include <time.h>
+
+#define MAX_PREC (4096 / MP_DIGIT_BIT)
+
+mp_err
+identity_test(void)
+{
+ mp_size preca, precb;
+ mp_err res;
+ mp_int a, b;
+ mp_int t1, t2, t3, t4, t5;
+
+ preca = (rand() % MAX_PREC) + 1;
+ precb = (rand() % MAX_PREC) + 1;
+
+ MP_DIGITS(&a) = 0;
+ MP_DIGITS(&b) = 0;
+ MP_DIGITS(&t1) = 0;
+ MP_DIGITS(&t2) = 0;
+ MP_DIGITS(&t3) = 0;
+ MP_DIGITS(&t4) = 0;
+ MP_DIGITS(&t5) = 0;
+
+ MP_CHECKOK(mp_init(&a));
+ MP_CHECKOK(mp_init(&b));
+ MP_CHECKOK(mp_init(&t1));
+ MP_CHECKOK(mp_init(&t2));
+ MP_CHECKOK(mp_init(&t3));
+ MP_CHECKOK(mp_init(&t4));
+ MP_CHECKOK(mp_init(&t5));
+
+ MP_CHECKOK(mpp_random_size(&a, preca));
+ MP_CHECKOK(mpp_random_size(&b, precb));
+
+ if (mp_cmp(&a, &b) < 0)
+ mp_exch(&a, &b);
+
+ MP_CHECKOK(mp_mod(&a, &b, &t1)); /* t1 = a%b */
+ MP_CHECKOK(mp_div(&a, &b, &t2, NULL)); /* t2 = a/b */
+ MP_CHECKOK(mp_mul(&b, &t2, &t3)); /* t3 = (a/b)*b */
+ MP_CHECKOK(mp_add(&t1, &t3, &t4)); /* t4 = a%b + (a/b)*b */
+ MP_CHECKOK(mp_sub(&t4, &a, &t5)); /* t5 = a%b + (a/b)*b - a */
+ if (mp_cmp_z(&t5) != 0) {
+ res = MP_UNDEF;
+ goto CLEANUP;
+ }
+
+CLEANUP:
+ mp_clear(&t5);
+ mp_clear(&t4);
+ mp_clear(&t3);
+ mp_clear(&t2);
+ mp_clear(&t1);
+ mp_clear(&b);
+ mp_clear(&a);
+ return res;
+}
+
+int
+main(void)
+{
+ unsigned int seed = (unsigned int)time(NULL);
+ unsigned long count = 0;
+ mp_err res;
+
+ srand(seed);
+
+ while (MP_OKAY == (res = identity_test())) {
+ if ((++count % 100) == 0)
+ fputc('.', stderr);
+ }
+
+ fprintf(stderr, "\ntest failed, err %d\n", res);
+ return res;
+}