/usr/include/wolfssl/wolfcrypt/curve25519.h is in libwolfssl-dev 3.4.8+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | /* curve25519.h
*
* Copyright (C) 2006-2015 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* 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 02110-1301, USA
*/
#ifndef WOLF_CRYPT_CURVE25519_H
#define WOLF_CRYPT_CURVE25519_H
#include <wolfssl/wolfcrypt/types.h>
#ifdef HAVE_CURVE25519
#include <wolfssl/wolfcrypt/fe_operations.h>
#include <wolfssl/wolfcrypt/random.h>
#ifdef __cplusplus
extern "C" {
#endif
#define CURVE25519_KEYSIZE 32
/* curve25519 set type */
typedef struct {
int size; /* The size of the curve in octets */
const char* name; /* name of this curve */
} curve25519_set_type;
/* ECC point */
typedef struct {
byte point[CURVE25519_KEYSIZE];
}ECPoint;
/* A CURVE25519 Key */
typedef struct {
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 */
} curve25519_key;
WOLFSSL_API
int wc_curve25519_make_key(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_init(curve25519_key* key);
WOLFSSL_API
void wc_curve25519_free(curve25519_key* key);
/* raw key helpers */
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_export_private_raw(curve25519_key* key, byte* out,
word32* outLen);
WOLFSSL_API
int wc_curve25519_import_public(const byte* in, word32 inLen,
curve25519_key* key);
WOLFSSL_API
int wc_curve25519_export_public(curve25519_key* key, byte* out, word32* outLen);
/* size helper */
WOLFSSL_API
int wc_curve25519_size(curve25519_key* key);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_CURVE25519 */
#endif /* WOLF_CRYPT_CURVE25519_H */
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