diff -r 000000000000 -r 6474c204b198 security/nss/lib/freebl/mpi/utils/metime.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/nss/lib/freebl/mpi/utils/metime.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,100 @@
+/* 
+ *  metime.c
+ *
+ * Modular exponentiation timing test
+ *
+ * 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 <limits.h>
+#include <time.h>
+
+#include "mpi.h"
+#include "mpprime.h"
+
+double clk_to_sec(clock_t start, clock_t stop);
+
+int main(int argc, char *argv[])
+{
+  int          ix, num, prec = 8;
+  unsigned int seed;
+  clock_t      start, stop;
+  double       sec;
+
+  mp_int     a, m, c;
+
+  if(getenv("SEED") != NULL)
+    seed = abs(atoi(getenv("SEED")));
+  else 
+    seed = (unsigned int)time(NULL);
+
+  if(argc < 2) {
+    fprintf(stderr, "Usage: %s <num-tests> [<nbits>]\n", argv[0]);
+    return 1;
+  }
+
+  if((num = atoi(argv[1])) < 0)
+    num = -num;
+
+  if(!num) {
+    fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]);
+    return 1;
+  }
+
+  if(argc > 2) {
+    if((prec = atoi(argv[2])) <= 0)
+      prec = 8;
+    else 
+      prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT;
+
+  }
+  
+  printf("Modular exponentiation timing test\n"
+	 "Precision:  %d digits (%d bits)\n"
+	 "# of tests: %d\n\n", prec, prec * DIGIT_BIT, num);
+
+  mp_init_size(&a, prec);
+  mp_init_size(&m, prec);
+  mp_init_size(&c, prec);
+
+  srand(seed);
+
+  start = clock();
+  for(ix = 0; ix < num; ix++) {
+
+    mpp_random_size(&a, prec);
+    mpp_random_size(&c, prec);
+    mpp_random_size(&m, prec);
+    /* set msb and lsb of m */
+    DIGIT(&m,0) |= 1;
+    DIGIT(&m, USED(&m)-1) |= (mp_digit)1 << (DIGIT_BIT - 1);
+    if (mp_cmp(&a, &m) > 0)
+      mp_sub(&a, &m, &a);
+
+    mp_exptmod(&a, &c, &m, &c);
+  }
+  stop = clock();
+
+  sec = clk_to_sec(start, stop);
+
+  printf("Total:      %.3f seconds\n", sec);
+  printf("Individual: %.3f seconds\n", sec / num);
+
+  mp_clear(&c);
+  mp_clear(&a);
+  mp_clear(&m);
+
+  return 0;
+}
+
+double clk_to_sec(clock_t start, clock_t stop)
+{
+  return (double)(stop - start) / CLOCKS_PER_SEC;
+}
+
+/*------------------------------------------------------------------------*/
+/* HERE THERE BE DRAGONS                                                  */