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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
//
// The functions in this file are used for initialization of the interface to the
// OpenSSL library.
//** Defines and Includes
#include "Tpm.h"
#if SYM_LIB == WOLF && defined TPM_ALG_TDES
//**Functions
//*** TDES_set_encyrpt_key()
// This function makes creation of a TDES key look like the creation of a key for
// any of the other OpenSSL block ciphers. It will create three key schedules,
// one for each of the DES keys. If there are only two keys, then the third schedule
// is a copy of the first.
void
TDES_set_encrypt_key(
const BYTE *key,
UINT16 keySizeInBits,
tpmKeyScheduleTDES *keySchedule
)
{
DES_set_key_unchecked((const_DES_cblock *)key, &keySchedule[0]);
DES_set_key_unchecked((const_DES_cblock *)&key[8], &keySchedule[1]);
// If is two-key, copy the schedule for K1 into K3, otherwise, compute the
// the schedule for K3
if(keySizeInBits == 128)
keySchedule[2] = keySchedule[0];
else
DES_set_key_unchecked((const_DES_cblock *)&key[16],
&keySchedule[2]);
}
//*** TDES_encyrpt()
// The TPM code uses one key schedule. For TDES, the schedule contains three
// schedules. OpenSSL wants the schedules referenced separately. This function
// does that.
void TDES_encrypt(
const BYTE *in,
BYTE *out,
tpmKeyScheduleTDES *ks
)
{
DES_ecb3_encrypt((const_DES_cblock *)in, (DES_cblock *)out,
&ks[0], &ks[1], &ks[2],
DES_ENCRYPT);
}
//*** TDES_decrypt()
// As with TDES_encypt() this function bridges between the TPM single schedule
// model and the OpenSSL three schedule model.
void TDES_decrypt(
const BYTE *in,
BYTE *out,
tpmKeyScheduleTDES *ks
)
{
DES_ecb3_encrypt((const_DES_cblock *)in, (DES_cblock *)out,
&ks[0], &ks[1], &ks[2],
DES_DECRYPT);
}
#endif // SYM_LIB == WOLF
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