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/* curve25519.h
* NaCl/Sodium-compatible API for Curve25519 cryptography.
*
* Copyright (c) 2018, Peter Wu <peter@lekensteyn.nl>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* Callers MUST check GCRYPT_VERSION_NUMBER >= 0x010700 before using this API.
*/
#ifndef __CURVE25519_H__
#define __CURVE25519_H__
#include "ws_symbol_export.h"
#include "wsgcrypt.h"
/*
* Computes Q = X25519(n, P). In other words, given the secret key n, the public
* key P, compute the shared secret Q. Each key is 32 bytes long.
* Returns 0 on success or -1 on failure.
*/
WS_DLL_PUBLIC
int crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
const unsigned char *p);
/*
* Computes the Curve25519 32-byte public key Q from the 32-byte secret key n.
* Returns 0 on success or -1 on failure.
*/
WS_DLL_PUBLIC
int crypto_scalarmult_curve25519_base(unsigned char *q, const unsigned char *n);
#endif /* __CURVE25519_H__ */
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