Integrated ECC internals.

1 files changed, 43 insertions, 0 deletions

diff --git a/sec-sub-1.c b/sec-sub-1.c
new file mode 100644
index 00000000..1aa04d04
--- /dev/null
+++ b/sec-sub-1.c
@@ -0,0 +1,43 @@
+/* sec-add-1.c */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2013 Niels Möller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02111-1301, USA.
+ */
+
+/* Development of Nettle's ECC support was funded by Internetfonden. */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "ecc-internal.h"
+
+mp_limb_t
+sec_sub_1 (mp_limb_t *rp, mp_limb_t *ap, mp_size_t n, mp_limb_t b)
+{
+  mp_size_t i;
+  for (i = 0; i < n; i++)
+    {
+      mp_limb_t a;
+      a = ap[i];
+      rp[i] = a - b;
+      b = a < b;
+    }
+  return b;
+}