/* 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 | |
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* 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 (defined SYM_LIB_OSSL) && 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_OSSL |