usbloadergx/source/libs/libwolfssl/wolfcrypt/curve25519.h
2020-07-06 17:06:35 +01:00

166 lines
5.1 KiB
C

/* curve25519.h
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/*!
\file wolfssl/wolfcrypt/curve25519.h
*/
#ifndef WOLF_CRYPT_CURVE25519_H
#define WOLF_CRYPT_CURVE25519_H
#include <libs/libwolfssl/wolfcrypt/types.h>
#ifdef HAVE_CURVE25519
#include <libs/libwolfssl/wolfcrypt/fe_operations.h>
#include <libs/libwolfssl/wolfcrypt/random.h>
#ifdef WOLFSSL_ASYNC_CRYPT
#include <libs/libwolfssl/wolfcrypt/async.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define CURVE25519_KEYSIZE 32
#ifdef WOLFSSL_NAMES_STATIC
typedef char curve25519_str[12];
#else
typedef const char* curve25519_str;
#endif
/* curve25519 set type */
typedef struct {
int size; /* The size of the curve in octets */
curve25519_str name; /* name of this curve */
} curve25519_set_type;
/* ECC point, the internal structure is Little endian
* the mathematical functions used the endianness */
typedef struct {
byte point[CURVE25519_KEYSIZE];
#ifdef FREESCALE_LTC_ECC
byte pointY[CURVE25519_KEYSIZE];
#endif
} ECPoint;
/* A CURVE25519 Key */
typedef struct curve25519_key {
int idx; /* Index into the ecc_sets[] for the parameters of
this curve if -1, this key is using user supplied
curve in dp */
const curve25519_set_type* dp; /* domain parameters, either points to
curves (idx >= 0) or user supplied */
ECPoint p; /* public key */
ECPoint k; /* private key */
#ifdef WOLFSSL_ASYNC_CRYPT
WC_ASYNC_DEV asyncDev;
#endif
} curve25519_key;
enum {
EC25519_LITTLE_ENDIAN=0,
EC25519_BIG_ENDIAN=1
};
WOLFSSL_API
int wc_curve25519_make_key(WC_RNG* rng, int keysize, curve25519_key* key);
WOLFSSL_API
int wc_curve25519_shared_secret(curve25519_key* private_key,
curve25519_key* public_key,
byte* out, word32* outlen);
WOLFSSL_API
int wc_curve25519_shared_secret_ex(curve25519_key* private_key,
curve25519_key* public_key,
byte* out, word32* outlen, int endian);
WOLFSSL_API
int wc_curve25519_init(curve25519_key* key);
WOLFSSL_API
void wc_curve25519_free(curve25519_key* key);
/* raw key helpers */
WOLFSSL_API
int wc_curve25519_import_private(const byte* priv, word32 privSz,
curve25519_key* key);
WOLFSSL_API
int wc_curve25519_import_private_ex(const byte* priv, word32 privSz,
curve25519_key* key, int endian);
WOLFSSL_API
int wc_curve25519_import_private_raw(const byte* priv, word32 privSz,
const byte* pub, word32 pubSz, curve25519_key* key);
WOLFSSL_API
int wc_curve25519_import_private_raw_ex(const byte* priv, word32 privSz,
const byte* pub, word32 pubSz,
curve25519_key* key, int endian);
WOLFSSL_API
int wc_curve25519_export_private_raw(curve25519_key* key, byte* out,
word32* outLen);
WOLFSSL_API
int wc_curve25519_export_private_raw_ex(curve25519_key* key, byte* out,
word32* outLen, int endian);
WOLFSSL_API
int wc_curve25519_import_public(const byte* in, word32 inLen,
curve25519_key* key);
WOLFSSL_API
int wc_curve25519_import_public_ex(const byte* in, word32 inLen,
curve25519_key* key, int endian);
WOLFSSL_API
int wc_curve25519_check_public(const byte* pub, word32 pubSz, int endian);
WOLFSSL_API
int wc_curve25519_export_public(curve25519_key* key, byte* out, word32* outLen);
WOLFSSL_API
int wc_curve25519_export_public_ex(curve25519_key* key, byte* out,
word32* outLen, int endian);
WOLFSSL_API
int wc_curve25519_export_key_raw(curve25519_key* key,
byte* priv, word32 *privSz,
byte* pub, word32 *pubSz);
WOLFSSL_API
int wc_curve25519_export_key_raw_ex(curve25519_key* key,
byte* priv, word32 *privSz,
byte* pub, word32 *pubSz,
int endian);
/* size helper */
WOLFSSL_API
int wc_curve25519_size(curve25519_key* key);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_CURVE25519 */
#endif /* WOLF_CRYPT_CURVE25519_H */