/usr/include/wolfssl/wolfcrypt/curve25519.h is in libwolfssl-dev 3.13.0+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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | /* curve25519.h
*
* Copyright (C) 2006-2017 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
*/
#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 WOLFSSL_ASYNC_CRYPT
#include <wolfssl/wolfcrypt/async.h>
#endif
#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, the internal structure is Little endian
* the mathematical functions used the endianess */
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_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 */
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