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/* 
//               Intel(R) Integrated Performance Primitives
//                   Cryptographic Primitives (ippcp)
// 
//  Contents:
//        ippsMontSet()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcpmontgomery.h"
#include "pcptool.h"

/*F*
// Name: ippsMontSet
//
// Purpose: Setup modulus value
//
// Returns:                   Reason:
//    ippStsNullPtrErr           pCtx == NULL
//                               pModulus == NULL
//    ippStsContextMatchErr      !MNT_VALID_ID(pCtx)
//    ippStsBadModulusErr        (pModulus[0] & 1) == 0
//    ippStsOutOfRangeErr        ((Ipp32u)MNT_ROOM(pCtx) < INTERNAL_BNU_LENGTH(size))
//    ippStsLengthErr            size<1
//    ippStsNoErr                no errors
//
// Parameters:
//    pModulus    pointer to the modulus buffer
//    size        length of the  modulus (in Ipp32u chunks).
//    pCtx        pointer to the context
*F*/

IPPFUN(IppStatus, ippsMontSet,(const Ipp32u* pModulus, int size, IppsMontState* pCtx))
{
   IPP_BAD_PTR2_RET(pModulus, pCtx);
   pCtx = (IppsMontState*)(IPP_ALIGNED_PTR((pCtx), MONT_ALIGNMENT));
   IPP_BADARG_RET(!MNT_VALID_ID(pCtx), ippStsContextMatchErr);

   IPP_BADARG_RET(size<1, ippStsLengthErr);

   /* modulus is not an odd number */
   IPP_BADARG_RET((pModulus[0] & 1) == 0, ippStsBadModulusErr);
   IPP_BADARG_RET(((Ipp32u)MNT_ROOM(pCtx) < INTERNAL_BNU_LENGTH(size)), ippStsOutOfRangeErr);

   {
      return cpMontSet(pModulus, size, pCtx);
   }
}