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authorNiels Möller <nisse@lysator.liu.se>2013-02-15 09:47:14 +0100
committerNiels Möller <nisse@lysator.liu.se>2013-02-15 09:47:14 +0100
commit9422a55130ba65f73a053f063efa6226f945b4f1 (patch)
treec35c54d1a5762aa41ad7fd5b85b32181da0f78a3 /ecc-generic-modp.c
parent75a1291ed08198f75140bdbb52b317f39e60d4ca (diff)
downloadnettle-9422a55130ba65f73a053f063efa6226f945b4f1.tar.gz
Integrated ECC internals.
Diffstat (limited to 'ecc-generic-modp.c')
-rw-r--r--ecc-generic-modp.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/ecc-generic-modp.c b/ecc-generic-modp.c
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+/* ecc-generic-modp.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 <assert.h>
+
+#include "ecc-internal.h"
+
+void
+ecc_generic_modp (const struct ecc_curve *ecc, mp_limb_t *rp)
+{
+ assert (ecc->Bmodp_size < ecc->size);
+
+ ecc_mod (rp, 2*ecc->size, ecc->size, ecc->Bmodp, ecc->Bmodp_size,
+ ecc->Bmodp_shifted,
+ ecc->size * GMP_NUMB_BITS - ecc->bit_size);
+}