lib/libcrypto/curve25519/curve25519-generic.c

   1 /*
   2  * Copyright (c) 2015, Google Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 /*
  18  * This code is mostly taken from the ref10 version of Ed25519 in SUPERCOP
  19  * 20141124 (http://bench.cr.yp.to/supercop.html). That code is released as
  20  * public domain but this file has the ISC license just to keep licencing
  21  * simple.
  22  *
  23  * The field functions are shared by Ed25519 and X25519 where possible.
  24  */
  25
  26 #include "curve25519_internal.h"
  27
  28 void
  29 x25519_scalar_mult(uint8_t out[32], const uint8_t scalar[32],
  30     const uint8_t point[32])
  31 {
  32         x25519_scalar_mult_generic(out, scalar, point);
  33 }