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/* 
// 
//  Purpose:
//     Cryptography Primitive.
//     Digesting message according to SHA256
// 
//  Contents:
//        ippsSHA256Final()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcphash.h"
#include "pcphash_rmf.h"
#include "pcptool.h"
#include "pcpsha256stuff.h"


/*F*
//    Name: ippsSHA256Final
//
// Purpose: Stop message digesting and return digest.
//
// Returns:                Reason:
//    ippStsNullPtrErr        pMD == NULL
//                            pState == NULL
//    ippStsContextMatchErr   pState->idCtx != idCtxSHA256
//    ippStsNoErr             no errors
//
// Parameters:
//    pMD         address of the output digest
//    pState      pointer to the SHA256 state
//
*F*/
IPPFUN(IppStatus, ippsSHA256Final,(Ipp8u* pMD, IppsSHA256State* pState))
{
   /* test state pointer and ID */
   IPP_BAD_PTR1_RET(pState);
   pState = (IppsSHA256State*)( IPP_ALIGNED_PTR(pState, SHA256_ALIGNMENT) );
   IPP_BADARG_RET(idCtxSHA256 !=HASH_CTX_ID(pState), ippStsContextMatchErr);

   /* test digest pointer */
   IPP_BAD_PTR1_RET(pMD);

   cpFinalizeSHA256(HASH_VALUE(pState), HASH_BUFF(pState), HAHS_BUFFIDX(pState), HASH_LENLO(pState));
   /* convert hash into big endian */
   ((Ipp32u*)pMD)[0] = ENDIANNESS32(HASH_VALUE(pState)[0]);
   ((Ipp32u*)pMD)[1] = ENDIANNESS32(HASH_VALUE(pState)[1]);
   ((Ipp32u*)pMD)[2] = ENDIANNESS32(HASH_VALUE(pState)[2]);
   ((Ipp32u*)pMD)[3] = ENDIANNESS32(HASH_VALUE(pState)[3]);
   ((Ipp32u*)pMD)[4] = ENDIANNESS32(HASH_VALUE(pState)[4]);
   ((Ipp32u*)pMD)[5] = ENDIANNESS32(HASH_VALUE(pState)[5]);
   ((Ipp32u*)pMD)[6] = ENDIANNESS32(HASH_VALUE(pState)[6]);
   ((Ipp32u*)pMD)[7] = ENDIANNESS32(HASH_VALUE(pState)[7]);

   /* re-init hash value */
   HAHS_BUFFIDX(pState) = 0;
   HASH_LENLO(pState) = 0;
   sha256_hashInit(HASH_VALUE(pState));

   return ippStsNoErr;
}