/*************************************************************************
* Copyright (C) 2014 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (the "License");
* 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.
//     Security Hash Standard
//     General Functionality
//
//  Contents:
//        ippsHashDuplicate()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "hash/pcphash.h"
#include "pcptool.h"

/*F*
//    Name: ippsHashDuplicate
//
// Purpose: Clone Hash context.
//
// Returns:                Reason:
//    ippStsNullPtrErr           pSrcState == NULL
//                               pDstState == NULL
//    ippStsContextMatchErr      pSrcState->idCtx != idCtxHash
//                               pDstState->idCtx != idCtxHash
//
//    ippStsNotSupportedModeErr  method from the SHA3 family
//
//    ippStsNoErr                no errors
//
// Parameters:
//    pSrcState     pointer to the source Hash context
//    pDstState     pointer to the target Hash context
//
// Note:
//    pDstState may to be uninitialized by ippsHashInit()
//
*F*/
IPPFUN(IppStatus, ippsHashDuplicate, (const IppsHashState* pSrcState, IppsHashState* pDstState))
{
    /* test state pointers */
    IPP_BAD_PTR2_RET(pSrcState, pDstState);
    /* test states ID */
    IPP_BADARG_RET(!HASH_VALID_ID(pSrcState, idCtxHash), ippStsContextMatchErr);
    /* check if the algorithm is from the sha3 family (SHA3 is not supported in non-rmf methods)*/
    IPP_BADARG_RET(cpIsSHA3AlgID(HASH_ALG_ID(pSrcState)), ippStsNotSupportedModeErr);
    /* copy state */
    CopyBlock(pSrcState, pDstState, sizeof(IppsHashState));
    HASH_SET_ID(pDstState, idCtxHash);

    return ippStsNoErr;
}
