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40 
41 /*
42 //     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
43 //     Operations over GF(p).
44 //
45 //     Context:
46 //        ippsGFpSetElement()
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: ippsGFpSetElement
60 //
61 // Purpose: Set GF Element
62 //
63 // Returns:                   Reason:
64 //    ippStsNullPtrErr           NULL == pGFp
65 //                               NULL == pR
66 //                               NULL == pA && lenA>0
67 //
68 //    ippStsContextMatchErr      invalid pGFp->idCtx
69 //                               invalid pR->idCtx
70 //
71 //    ippStsSizeErr              pA && !(0<=lenA && lenA<GFP_FELEN32())
72 //
73 //    ippStsOutOfRangeErr        GFPE_ROOM() != GFP_FELEN()
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 representation Finite Field element
80 //    lenA        length of Finite Field data representation array
81 //    pR          pointer to Finite Field Element context
82 //    pGFp        pointer to Finite Field context
83 *F*/
84 IPPFUN(IppStatus, ippsGFpSetElement,(const Ipp32u* pA, int lenA, IppsGFpElement* pR, IppsGFpState* pGFp))
85 {
86    IPP_BAD_PTR2_RET(pR, pGFp);
87    pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) );
88    IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr );
89    IPP_BADARG_RET( !GFPE_TEST_ID(pR), ippStsContextMatchErr );
90 
91    IPP_BADARG_RET( !pA && (0<lenA), ippStsNullPtrErr);
92    IPP_BADARG_RET( pA && !(0<=lenA && lenA<=GFP_FELEN32(GFP_PMA(pGFp))), ippStsSizeErr );
93    IPP_BADARG_RET( GFPE_ROOM(pR)!=GFP_FELEN(GFP_PMA(pGFp)), ippStsOutOfRangeErr );
94 
95    {
96       IppStatus sts = ippStsNoErr;
97 
98       gsModEngine* pGFE = GFP_PMA(pGFp);
99       int elemLen = GFP_FELEN(pGFE);
100       BNU_CHUNK_T* pTmp = cpGFpGetPool(1, pGFE);
101       //tbcd: temporary excluded: assert(NULL!=pTmp);
102 
103       ZEXPAND_BNU(pTmp, 0, elemLen);
104       if(pA && lenA)
105          cpGFpxCopyToChunk(pTmp, pA, lenA, pGFE);
106 
107       if(!cpGFpxSet(GFPE_DATA(pR), pTmp, elemLen, pGFE))
108          sts = ippStsOutOfRangeErr;
109 
110       cpGFpReleasePool(1, pGFE);
111       return sts;
112    }
113 }
114