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/*******************************************************************************
* Copyright 2015-2018 Intel Corporation
* All Rights Reserved.
*
* If this software was obtained under the Intel Simplified Software License,
* the following terms apply:
*
* The source code, information and material ("Material") contained herein is
* owned by Intel Corporation or its suppliers or licensors, and title to such
* Material remains with Intel Corporation or its suppliers or licensors. The
* Material contains proprietary information of Intel or its suppliers and
* licensors. The Material is protected by worldwide copyright laws and treaty
* provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed or disclosed
* in any way without Intel's prior express written permission. No license under
* any patent, copyright or other intellectual property rights in the Material
* is granted to or conferred upon you, either expressly, by implication,
* inducement, estoppel or otherwise. Any license under such intellectual
* property rights must be express and approved by Intel in writing.
*
* Unless otherwise agreed by Intel in writing, you may not remove or alter this
* notice or any other notice embedded in Materials by Intel or Intel's
* suppliers or licensors in any way.
*
*
* If this software was obtained under the Apache License, Version 2.0 (the
* "License"), the following terms apply:
*
* You may not use this file except in compliance with the License. You may
* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
/*
//
// Purpose:
// Cryptography Primitive.
// AES-SIV Functions (RFC 5297)
//
// Contents:
// Stuff()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpcmac.h"
#include "pcpaesm.h"
#include "pcptool.h"
#if !defined(_PCP_AES_SIV_STUFF_H_)
#define _PCP_AES_SIV_STUFF_H_
////////////////////////////////////////////////////////////
__INLINE void cpAES_CMAC(Ipp8u mac[MBS_RIJ128], const Ipp8u* pSrc, int len, IppsAES_CMACState* pCtx)
{
ippsAES_CMACUpdate(pSrc, len, pCtx);
ippsAES_CMACFinal(mac, MBS_RIJ128, pCtx);
}
__INLINE IppStatus cpAES_S2V_init(Ipp8u v[MBS_RIJ128], const Ipp8u* pKey, int keyLen, IppsAES_CMACState* pCtx, int ctxSize)
{
IppStatus sts = ippsAES_CMACInit(pKey, keyLen, pCtx, ctxSize);
if(ippStsNoErr==sts) {
PaddBlock(0, v, MBS_RIJ128);
cpAES_CMAC(v, v, MBS_RIJ128, pCtx);
}
return sts;
}
__INLINE Ipp8u* double16(Ipp8u out[MBS_RIJ128], const Ipp8u inp[MBS_RIJ128])
{
/* double inp */
Ipp32u carry = 0;
int n;
for(n=0; n<MBS_RIJ128; n++) {
Ipp32u x = inp[MBS_RIJ128-1-n] + inp[MBS_RIJ128-1-n] + carry;
out[MBS_RIJ128-1-n] = (Ipp8u)x;
carry = (x>>8) & 0xFF;
}
out[MBS_RIJ128-1] ^= ((Ipp8u)(0-carry) & 0x87);
return out;
}
__INLINE void cpAES_S2V_update(Ipp8u v[MBS_RIJ128], const Ipp8u* pSrc, int len, IppsAES_CMACState* pCtx)
{
Ipp8u t[MBS_RIJ128];
cpAES_CMAC(t, pSrc, len, pCtx);
double16(v, v);
XorBlock16(v, t, v);
}
static void cpAES_S2V_final(Ipp8u v[MBS_RIJ128], const Ipp8u* pSrc, int len, IppsAES_CMACState* pCtx)
{
Ipp8u t[MBS_RIJ128];
if(len>=MBS_RIJ128) {
ippsAES_CMACUpdate(pSrc, len-MBS_RIJ128, pCtx);
XorBlock16(pSrc+len-MBS_RIJ128, v, t);
}
else {
double16(t, v);
XorBlock(pSrc, t, t, len);
t[len] ^= 0x80;
}
cpAES_CMAC(v, t, MBS_RIJ128, pCtx);
}
#endif /*_PCP_AES_SIV_STUFF_H_*/
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