wsutil/curve25519.h

   1 /** @file
   2  * NaCl/Sodium-compatible API for Curve25519 cryptography.
   3  *
   4  * Copyright (c) 2018, Peter Wu <peter@lekensteyn.nl>
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * SPDX-License-Identifier: GPL-2.0-or-later
  11  */
  12
  13 #ifndef __CURVE25519_H__
  14 #define __CURVE25519_H__
  15
  16 #include <wireshark.h>
  17
  18 /*
  19  * Computes Q = X25519(n, P). In other words, given the secret key n, the public
  20  * key P, compute the shared secret Q. Each key is 32 bytes long.
  21  * Returns 0 on success or -1 on failure.
  22  */
  23 WS_DLL_PUBLIC
  24 int crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
  25                                  const unsigned char *p);
  26
  27 /*
  28  * Computes the Curve25519 32-byte public key Q from the 32-byte secret key n.
  29  * Returns 0 on success or -1 on failure.
  30  */
  31 WS_DLL_PUBLIC
  32 int crypto_scalarmult_curve25519_base(unsigned char *q, const unsigned char *n);
  33
  34 #endif /* __CURVE25519_H__ */