ext/ipp/sources/ippcp/pcpsha256duplicate.c

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/* 
// 
//  Purpose:
//     Cryptography Primitive.
//     Digesting message according to SHA256
// 
//  Contents:
//        ippsSHA256Duplicate()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcphash.h"
#include "pcphash_rmf.h"
#include "pcptool.h"

/*F*
//    Name: ippsSHA256Duplicate
//
// Purpose: Clone SHA256 state.
//
// Returns:                Reason:
//    ippStsNullPtrErr        pSrcState == NULL
//                            pDstState == NULL
//    ippStsContextMatchErr   pSrcState->idCtx != idCtxSHA256
//                            pDstState->idCtx != idCtxSHA256
//    ippStsNoErr             no errors
//
// Parameters:
//    pSrcState   pointer to the source SHA256 state
//    pDstState   pointer to the target SHA256 state
//
// Note:
//    pDstState may to be uninitialized by ippsSHA256Init()
//
*F*/
IPPFUN(IppStatus, ippsSHA256Duplicate,(const IppsSHA256State* pSrcState, IppsSHA256State* pDstState))
{
   /* test state pointers */
   IPP_BAD_PTR2_RET(pSrcState, pDstState);
   pSrcState = (IppsSHA256State*)( IPP_ALIGNED_PTR(pSrcState, SHA256_ALIGNMENT) );
   pDstState = (IppsSHA256State*)( IPP_ALIGNED_PTR(pDstState, SHA256_ALIGNMENT) );
   /* test states ID */
   IPP_BADARG_RET(idCtxSHA256 !=HASH_CTX_ID(pSrcState), ippStsContextMatchErr);

   /* copy state */
   CopyBlock(pSrcState, pDstState, sizeof(IppsSHA256State));

   return ippStsNoErr;
}