diff -r 000000000000 -r 6474c204b198 security/nss/lib/freebl/mpi/tests/mptest-4.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/nss/lib/freebl/mpi/tests/mptest-4.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,93 @@
+/*
+ * Simple test driver for MPI library
+ *
+ * Test 4: Modular arithmetic tests
+ *
+ * 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 <string.h>
+#include <ctype.h>
+#include <limits.h>
+
+#include "mpi.h"
+
+int main(int argc, char *argv[])
+{
+  int      ix;
+  mp_int   a, b, c, m;
+  mp_digit r;
+
+  if(argc < 4) {
+    fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]);
+    return 1;
+  }
+
+  printf("Test 4: Modular arithmetic\n\n");
+
+  mp_init(&a);
+  mp_init(&b);
+  mp_init(&m);
+
+  mp_read_radix(&a, argv[1], 10);
+  mp_read_radix(&b, argv[2], 10);
+  mp_read_radix(&m, argv[3], 10);
+  printf("a = "); mp_print(&a, stdout); fputc('\n', stdout);
+  printf("b = "); mp_print(&b, stdout); fputc('\n', stdout);
+  printf("m = "); mp_print(&m, stdout); fputc('\n', stdout);
+  
+  mp_init(&c);
+  printf("\nc = a (mod m)\n");
+
+  mp_mod(&a, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nc = b (mod m)\n");
+
+  mp_mod(&b, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nc = b (mod 1853)\n");
+
+  mp_mod_d(&b, 1853, &r);
+  printf("c = %04X\n", r);
+
+  printf("\nc = (a + b) mod m\n");
+
+  mp_addmod(&a, &b, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nc = (a - b) mod m\n");
+
+  mp_submod(&a, &b, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nc = (a * b) mod m\n");
+
+  mp_mulmod(&a, &b, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nc = (a ** b) mod m\n");
+
+  mp_exptmod(&a, &b, &m, &c);
+  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
+
+  printf("\nIn-place modular squaring test:\n");
+  for(ix = 0; ix < 5; ix++) {
+    printf("a = (a * a) mod m   a = ");
+    mp_sqrmod(&a, &m, &a);
+    mp_print(&a, stdout);
+    fputc('\n', stdout);
+  }
+  
+
+  mp_clear(&c);
+  mp_clear(&m);
+  mp_clear(&b);
+  mp_clear(&a);
+
+  return 0;
+}