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/********************************************************************************/
/* */
/* Initialization of the Interface to the OpenSSL Library. */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* $Id: TpmToOsslSupport.c 1519 2019-11-15 20:43:51Z kgoldman $ */
/* */
/* Licenses and Notices */
/* */
/* 1. Copyright Licenses: */
/* */
/* - Trusted Computing Group (TCG) grants to the user of the source code in */
/* this specification (the "Source Code") a worldwide, irrevocable, */
/* nonexclusive, royalty free, copyright license to reproduce, create */
/* derivative works, distribute, display and perform the Source Code and */
/* derivative works thereof, and to grant others the rights granted herein. */
/* */
/* - The TCG grants to the user of the other parts of the specification */
/* (other than the Source Code) the rights to reproduce, distribute, */
/* display, and perform the specification solely for the purpose of */
/* developing products based on such documents. */
/* */
/* 2. Source Code Distribution Conditions: */
/* */
/* - Redistributions of Source Code must retain the above copyright licenses, */
/* this list of conditions and the following disclaimers. */
/* */
/* - Redistributions in binary form must reproduce the above copyright */
/* licenses, this list of conditions and the following disclaimers in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* 3. Disclaimers: */
/* */
/* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */
/* LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH */
/* RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES) */
/* THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE. */
/* Contact TCG Administration (admin@trustedcomputinggroup.org) for */
/* information on specification licensing rights available through TCG */
/* membership agreements. */
/* */
/* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */
/* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */
/* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */
/* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */
/* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */
/* */
/* - Without limitation, TCG and its members and licensors disclaim all */
/* liability, including liability for infringement of any proprietary */
/* rights, relating to use of information in this specification and to the */
/* implementation of this specification, and TCG disclaims all liability for */
/* cost of procurement of substitute goods or services, lost profits, loss */
/* of use, loss of data or any incidental, consequential, direct, indirect, */
/* or special damages, whether under contract, tort, warranty or otherwise, */
/* arising in any way out of use or reliance upon this specification or any */
/* information herein. */
/* */
/* (c) Copyright IBM Corp. and others, 2016 - 2019 */
/* */
/********************************************************************************/
/* B.2.3.3. TpmToOsslSupport.c */
/* B.2.3.3.1. Introduction */
/* The functions in this file are used for initialization of the interface to the OpenSSL
library. */
/* B.2.3.3.2. Defines and Includes */
#include "Tpm.h"
#if defined(HASH_LIB_OSSL) || defined(MATH_LIB_OSSL) || defined(SYM_LIB_OSSL)
/* Used to pass the pointers to the correct sub-keys */
typedef const BYTE *desKeyPointers[3];
/* B.2.3.3.2.1. SupportLibInit() */
/* This does any initialization required by the support library. */
LIB_EXPORT int
SupportLibInit(
void
)
{
return TRUE;
}
/* B.2.3.3.2.2. OsslContextEnter() */
/* This function is used to initialize an OpenSSL context at the start of a function that will
call to an OpenSSL math function. */
BN_CTX *
OsslContextEnter(
void
)
{
BN_CTX *CTX = BN_CTX_new();
return OsslPushContext(CTX);
}
/* B.2.3.3.2.3. OsslContextLeave() */
/* This is the companion function to OsslContextEnter(). */
void
OsslContextLeave(
BN_CTX *CTX
)
{
OsslPopContext(CTX);
BN_CTX_free(CTX);
}
/* B.2.3.3.2.4. OsslPushContext() */
/* This function is used to create a frame in a context. All values allocated within this context after the frame is started will be automatically freed when the context (OsslPopContext() */
BN_CTX *
OsslPushContext(
BN_CTX *CTX
)
{
if(CTX == NULL)
FAIL(FATAL_ERROR_ALLOCATION);
BN_CTX_start(CTX);
return CTX;
}
/* B.2.3.3.2.5. OsslPopContext() */
/* This is the companion function to OsslPushContext(). */
void
OsslPopContext(
BN_CTX *CTX
)
{
// BN_CTX_end can't be called with NULL. It will blow up.
if(CTX != NULL)
BN_CTX_end(CTX);
}
#endif // HASH_LIB_OSSL || MATH_LIB_OSSL || SYM_LIB_OSSL
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