103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
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/* curve25519.h
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*
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* Copyright (C) 2006-2015 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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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 02110-1301, USA
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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 __cplusplus
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extern "C" {
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#endif
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#define CURVE25519_KEYSIZE 32
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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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const char* name; /* name of this curve */
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} curve25519_set_type;
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/* ECC point */
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typedef struct {
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byte point[CURVE25519_KEYSIZE];
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}ECPoint;
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/* A CURVE25519 Key */
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typedef struct {
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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 key */
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ECPoint k; /* private key */
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} curve25519_key;
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WOLFSSL_API
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int wc_curve25519_make_key(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_init(curve25519_key* key);
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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_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_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_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_export_public(curve25519_key* key, byte* out, word32* outLen);
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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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