1 files changed, 80 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/utils/exptmod.c b/security/nss/lib/freebl/mpi/utils/exptmod.c
new file mode 100644
index 000000000..d5e66ac37
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/utils/exptmod.c
@@ -0,0 +1,80 @@
+/*
+ *  exptmod.c
+ *
+ * Command line tool to perform modular exponentiation on arbitrary
+ * precision integers.
+ *
+ * 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 Michael J. Fromberger are 
+ * Copyright (C) 1998, 1999, 2000 Michael J. Fromberger. 
+ * All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License Version 2 or later (the
+ * "GPL"), in which case the provisions of the GPL are applicable
+ * instead of those above.  If you wish to allow use of your
+ * version of this file only under the terms of the GPL and not to
+ * allow others to use your version of this file under the MPL,
+ * indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by
+ * the GPL.  If you do not delete the provisions above, a recipient
+ * may use your version of this file under either the MPL or the GPL.
+ *
+ * $Id$ 
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "mpi.h"
+
+int main(int argc, char *argv[])
+{
+  mp_int  a, b, m;
+  mp_err  res;
+  char   *str;
+  int     len, rval = 0;
+
+  if(argc < 3) {
+    fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]);
+    return 1;
+  }
+
+  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);
+
+  if((res = mp_exptmod(&a, &b, &m, &a)) != MP_OKAY) {
+    fprintf(stderr, "%s: error: %s\n", argv[0], mp_strerror(res));
+    rval = 1;
+  } else {
+    len = mp_radix_size(&a, 10);
+    str = calloc(len, sizeof(char));
+    mp_toradix(&a, str, 10);
+
+    printf("%s\n", str);
+
+    free(str);
+  }
+
+  mp_clear(&a); mp_clear(&b); mp_clear(&m);
+
+  return rval;
+}