forked from cory/tildefriends
Cory McWilliams
e24fd92f85
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4477 ed5197a5-7fde-0310-b194-c3ffbd925b24
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*
|
|
* Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
/* Internal EC functions for other submodules: not for application use */
|
|
|
|
#ifndef OSSL_CRYPTO_EC_H
|
|
# define OSSL_CRYPTO_EC_H
|
|
# include <openssl/opensslconf.h>
|
|
|
|
# ifndef OPENSSL_NO_EC
|
|
|
|
# include <openssl/ec.h>
|
|
|
|
/*-
|
|
* Computes the multiplicative inverse of x in the range
|
|
* [1,EC_GROUP::order), where EC_GROUP::order is the cardinality of the
|
|
* subgroup generated by the generator G:
|
|
*
|
|
* res := x^(-1) (mod EC_GROUP::order).
|
|
*
|
|
* This function expects the following two conditions to hold:
|
|
* - the EC_GROUP order is prime, and
|
|
* - x is included in the range [1, EC_GROUP::order).
|
|
*
|
|
* This function returns 1 on success, 0 on error.
|
|
*
|
|
* If the EC_GROUP order is even, this function explicitly returns 0 as
|
|
* an error.
|
|
* In case any of the two conditions stated above is not satisfied,
|
|
* the correctness of its output is not guaranteed, even if the return
|
|
* value could still be 1 (as primality testing and a conditional modular
|
|
* reduction round on the input can be omitted by the underlying
|
|
* implementations for better SCA properties on regular input values).
|
|
*/
|
|
__owur int ec_group_do_inverse_ord(const EC_GROUP *group, BIGNUM *res,
|
|
const BIGNUM *x, BN_CTX *ctx);
|
|
|
|
/*-
|
|
* ECDH Key Derivation Function as defined in ANSI X9.63
|
|
*/
|
|
int ecdh_KDF_X9_63(unsigned char *out, size_t outlen,
|
|
const unsigned char *Z, size_t Zlen,
|
|
const unsigned char *sinfo, size_t sinfolen,
|
|
const EVP_MD *md);
|
|
|
|
# endif /* OPENSSL_NO_EC */
|
|
#endif
|