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/* Microsoft Reference Implementation for TPM 2.0
*
* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and
* contributor rights, including patent rights, and no such rights are granted
* under this license.
*
* Copyright (c) Microsoft Corporation
*
* All rights reserved.
*
* BSD License
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//** Introduction
// This file contains the structure definitions used for ECC in the LibTopCrypt
// version of the code. These definitions would change, based on the library.
// The ECC-related structures that cross the TPM interface are defined
// in TpmTypes.h
//
#ifndef _TPM_TO_OSSL_MATH_H
#define _TPM_TO_OSSL_MATH_H
#if MATH_LIB == OSSL
#include <openssl/evp.h>
#include <openssl/ec.h>
#include <openssl/bn.h>
//** Macros and Defines
// Make sure that the library is using the correct size for a crypt word
#if defined THIRTY_TWO_BIT && (RADIX_BITS != 32) \
|| defined SIXTY_FOUR_BIT && (RADIX_BITS != 64)
# error "Ossl library is using different radix"
#endif
// Allocate a local BIGNUM value. For the allocation, a bigNum structure is created
// as is a local BIGNUM. The bigNum is initialized and then the BIGNUM is
// set to reference the local value.
#define BIG_VAR(name, bits) \
BN_VAR(name##Bn, (bits)); \
BIGNUM _##name; \
BIGNUM *name = BigInitialized(&_##name, \
BnInit(name##Bn, \
BYTES_TO_CRYPT_WORDS(sizeof(_##name##Bn.d))))
// Allocate a BIGNUM and initialize with the values in a bigNum initializer
#define BIG_INITIALIZED(name, initializer) \
BIGNUM _##name; \
BIGNUM *name = BigInitialized(&_##name, initializer)
typedef struct
{
const ECC_CURVE_DATA *C; // the TPM curve values
EC_GROUP *G; // group parameters
BN_CTX *CTX; // the context for the math (this might not be
// the context in which the curve was created>;
} OSSL_CURVE_DATA;
typedef OSSL_CURVE_DATA *bigCurve;
#define AccessCurveData(E) ((E)->C)
#define CURVE_INITIALIZED(name, initializer) \
OSSL_CURVE_DATA _##name; \
bigCurve name = BnCurveInitialize(&_##name, initializer)
#include "TpmToOsslSupport_fp.h"
#define CURVE_FREE(E) \
if(E != NULL) \
{ \
if(E->G != NULL) \
EC_GROUP_free(E->G); \
OsslContextLeave(E->CTX); \
}
#define OSSL_ENTER() BN_CTX *CTX = OsslContextEnter()
#define OSSL_LEAVE() OsslContextLeave(CTX)
// This definition would change if there were something to report
#define MathLibSimulationEnd()
#endif // MATH_LIB == OSSL
#endif
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