199 lines
6 KiB
C
199 lines
6 KiB
C
/* curve25519.h
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*
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* Copyright (C) 2006-2023 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/*!
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\file wolfssl/wolfcrypt/curve25519.h
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*/
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#ifndef WOLF_CRYPT_CURVE25519_H
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#define WOLF_CRYPT_CURVE25519_H
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#include <wolfssl/wolfcrypt/types.h>
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#ifdef HAVE_CURVE25519
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#include <wolfssl/wolfcrypt/fe_operations.h>
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#include <wolfssl/wolfcrypt/random.h>
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#ifdef WOLFSSL_ASYNC_CRYPT
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#include <wolfssl/wolfcrypt/async.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CURVE25519_KEYSIZE 32
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#define CURVE25519_PUB_KEY_SIZE 32
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#ifdef WOLFSSL_NAMES_STATIC
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typedef char curve25519_str[12];
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#else
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typedef const char* curve25519_str;
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#endif
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/* curve25519 set type */
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typedef struct {
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int size; /* The size of the curve in octets */
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curve25519_str name; /* name of this curve */
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} curve25519_set_type;
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/* ECC point, the internal structure is Little endian
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* the mathematical functions used the endianness */
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typedef struct ECPoint {
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ALIGN16 byte point[CURVE25519_KEYSIZE];
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#ifdef FREESCALE_LTC_ECC
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ALIGN16 byte pointY[CURVE25519_KEYSIZE];
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#endif
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byte pointSz;
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} ECPoint;
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#ifndef WC_CURVE25519KEY_TYPE_DEFINED
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typedef struct curve25519_key curve25519_key;
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#define WC_CURVE25519KEY_TYPE_DEFINED
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#endif
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/* A CURVE25519 Key */
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struct curve25519_key {
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int idx; /* Index into the ecc_sets[] for the parameters of
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this curve if -1, this key is using user supplied
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curve in dp */
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const curve25519_set_type* dp; /* domain parameters, either points to
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curves (idx >= 0) or user supplied */
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ECPoint p; /* public point for key */
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ALIGN16 byte k[CURVE25519_KEYSIZE]; /* private scaler for key */
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#ifdef WOLFSSL_ASYNC_CRYPT
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WC_ASYNC_DEV asyncDev;
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#endif
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#if defined(WOLF_CRYPTO_CB)
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void* devCtx;
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int devId;
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#endif
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#ifdef WOLFSSL_SE050
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word32 keyId;
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byte keyIdSet;
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#endif
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/* bit fields */
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byte pubSet:1;
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byte privSet:1;
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};
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enum {
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EC25519_LITTLE_ENDIAN=0,
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EC25519_BIG_ENDIAN=1
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};
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WOLFSSL_API
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int wc_curve25519_make_pub(int public_size, byte* pub, int private_size,
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const byte* priv);
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WOLFSSL_API
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int wc_curve25519_generic(int public_size, byte* pub,
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int private_size, const byte* priv,
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int basepoint_size, const byte* basepoint);
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WOLFSSL_API
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int wc_curve25519_make_priv(WC_RNG* rng, int keysize, byte* priv);
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WOLFSSL_API
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int wc_curve25519_make_key(WC_RNG* rng, int keysize, curve25519_key* key);
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WOLFSSL_API
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int wc_curve25519_shared_secret(curve25519_key* private_key,
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curve25519_key* public_key,
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byte* out, word32* outlen);
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WOLFSSL_API
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int wc_curve25519_shared_secret_ex(curve25519_key* private_key,
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curve25519_key* public_key,
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byte* out, word32* outlen, int endian);
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WOLFSSL_API
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int wc_curve25519_init(curve25519_key* key);
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WOLFSSL_API
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int wc_curve25519_init_ex(curve25519_key* key, void* heap, int devId);
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WOLFSSL_API
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void wc_curve25519_free(curve25519_key* key);
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/* raw key helpers */
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WOLFSSL_API
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int wc_curve25519_import_private(const byte* priv, word32 privSz,
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curve25519_key* key);
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WOLFSSL_API
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int wc_curve25519_import_private_ex(const byte* priv, word32 privSz,
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curve25519_key* key, int endian);
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WOLFSSL_API
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int wc_curve25519_import_private_raw(const byte* priv, word32 privSz,
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const byte* pub, word32 pubSz, curve25519_key* key);
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WOLFSSL_API
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int wc_curve25519_import_private_raw_ex(const byte* priv, word32 privSz,
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const byte* pub, word32 pubSz,
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curve25519_key* key, int endian);
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WOLFSSL_API
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int wc_curve25519_export_private_raw(curve25519_key* key, byte* out,
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word32* outLen);
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WOLFSSL_API
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int wc_curve25519_export_private_raw_ex(curve25519_key* key, byte* out,
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word32* outLen, int endian);
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WOLFSSL_API
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int wc_curve25519_import_public(const byte* in, word32 inLen,
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curve25519_key* key);
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WOLFSSL_API
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int wc_curve25519_import_public_ex(const byte* in, word32 inLen,
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curve25519_key* key, int endian);
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WOLFSSL_API
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int wc_curve25519_check_public(const byte* pub, word32 pubSz, int endian);
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WOLFSSL_API
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int wc_curve25519_export_public(curve25519_key* key, byte* out, word32* outLen);
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WOLFSSL_API
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int wc_curve25519_export_public_ex(curve25519_key* key, byte* out,
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word32* outLen, int endian);
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WOLFSSL_API
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int wc_curve25519_export_key_raw(curve25519_key* key,
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byte* priv, word32 *privSz,
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byte* pub, word32 *pubSz);
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WOLFSSL_API
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int wc_curve25519_export_key_raw_ex(curve25519_key* key,
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byte* priv, word32 *privSz,
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byte* pub, word32 *pubSz,
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int endian);
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/* size helper */
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WOLFSSL_API
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int wc_curve25519_size(curve25519_key* key);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* HAVE_CURVE25519 */
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#endif /* WOLF_CRYPT_CURVE25519_H */
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