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     40 
     41 /*
     42 //     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
     43 //     Operations over GF(p).
     44 //
     45 //     Context:
     46 //        ippsGFpElementInit()
     47 //
     48 */
     49 #include "owndefs.h"
     50 #include "owncp.h"
     51 
     52 #include "pcpgfpstuff.h"
     53 #include "pcpgfpxstuff.h"
     54 #include "pcptool.h"
     55 
     56 //tbcd: temporary excluded: #include <assert.h>
     57 
     58 /*F*
     59 // Name: ippsGFpElementInit
     60 //
     61 // Purpose: Initializes the context of an element of the finite field.
     62 //
     63 // Returns:                   Reason:
     64 //    ippStsNullPtrErr          pGFp == NULL
     65 //                              pR == NULL
     66 //                              pA && nsA>0 == NULL
     67 //
     68 //    ippStsContextMatchErr     invalid pGFp->idCtx
     69 //                              invalid pR->idCtx
     70 //
     71 //    ippStsSizeErr             pA && !(0<=lenA && lenA<GFP_FELEN32(GFP_PMA(pGFp)))
     72 //
     73 //    ippStsOutOfRangeErr       GFPE_ROOM(pR)!=GFP_FELEN(GFP_PMA(pGFp)
     74 //                              BNU representation of pA[i]..pA[i+GFP_FELEN32()-1] >= modulus
     75 //
     76 //    ippStsNoErr               no error
     77 //
     78 // Parameters:
     79 //    pA      Pointer to the data array storing the finite field element.
     80 //    lenA    Length of the element.
     81 //    pR      Pointer to the context of the finite field element being initialized.
     82 //    pGFp    Pointer to the context of the finite field.
     83 //
     84 *F*/
     85 
     86 IPPFUN(IppStatus, ippsGFpElementInit,(const Ipp32u* pA, int lenA, IppsGFpElement* pR, IppsGFpState* pGFp))
     87 {
     88    IPP_BAD_PTR2_RET(pR, pGFp);
     89    pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) );
     90    IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr );
     91 
     92    IPP_BADARG_RET(0>lenA, ippStsSizeErr);
     93 
     94    {
     95       int elemLen = GFP_FELEN(GFP_PMA(pGFp));
     96 
     97       Ipp8u* ptr = (Ipp8u*)pR;
     98       ptr += sizeof(IppsGFpElement);
     99       cpGFpElementConstruct(pR, (BNU_CHUNK_T*)ptr, elemLen);
    100       return ippsGFpSetElement(pA, lenA, pR, pGFp);
    101    }
    102 }
    103