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diff --git a/security/nss/lib/freebl/mpi/tests/mptest-4.c b/security/nss/lib/freebl/mpi/tests/mptest-4.c
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+++ b/security/nss/lib/freebl/mpi/tests/mptest-4.c
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+/*
+ * Simple test driver for MPI library
+ *
+ * Test 4: Modular arithmetic tests
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael J. Fromberger.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+/* $Id$ */
+
+#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;
+}