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/*
* Copyright (c) 2010-2012 Frank Morgner and Dominik Oepen
*
* This file is part of OpenPACE.
*
* OpenPACE 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 3 of the License, or (at your option)
* any later version.
*
* OpenPACE 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
* OpenPACE. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file misc.h
* @brief Miscellaneous functions used in OpenPACE
*
* @author Frank Morgner <frankmorgner@gmail.com>
* @author Dominik Oepen <oepen@informatik.hu-berlin.de>
*/
#ifndef MISC_H
#define MISC_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <openssl/bn.h>
#include <openssl/buffer.h>
#include <openssl/ec.h>
/**
* @brief Creates a BUF_MEM object
*
* @param len required length of the buffer
*
* @return Initialized BUF_MEM object or NULL if an error occurred
*/
BUF_MEM *
BUF_MEM_create(size_t len);
/**
* @brief Creates and initializes a BUF_MEM object
*
* @param buf Initial data
* @param len Length of buf
*
* @return Initialized BUF_MEM object or NULL if an error occurred
*/
BUF_MEM *
BUF_MEM_create_init(const void *buf, size_t len);
/**
* @brief duplicates a BUF_MEM structure
*
* @param in BUF_MEM to duplicate
*
* @return pointer to the new BUF_MEM or NULL in case of error
*/
BUF_MEM *
BUF_MEM_dup(const BUF_MEM * in);
/**
* @brief converts an BIGNUM object to a BUF_MEM object
*
* @param bn bignumber to convert
*
* @return converted bignumber or NULL if an error occurred
*/
BUF_MEM *
BN_bn2buf(const BIGNUM *bn);
/**
* @brief converts an EC_POINT object to a BUF_MEM object
*
* @param ecdh EC_KEY object
* @param bn_ctx object (optional)
* @param ecp elliptic curve point to convert
*
* @return converted elliptic curve point or NULL if an error occurred
*/
BUF_MEM *
EC_POINT_point2mem(const EC_KEY * ecdh, BN_CTX * bn_ctx, const EC_POINT * ecp);
#ifdef HAVE_EC_KEY_METHOD
const EC_KEY_METHOD *EC_KEY_OpenSSL_Point(void);
#else
const ECDH_METHOD *ECDH_OpenSSL_Point(void);
#endif
void
EAC_add_all_objects(void);
void
EAC_remove_all_objects(void);
#endif
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