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40 
41 /*
42 //     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
43 //     Operations over GF(p).
44 //
45 //     Context:
46 //        ippsGFpMul_PE()
47 //
48 */
49 #include "owndefs.h"
50 #include "owncp.h"
51 
52 #include "pcpgfpstuff.h"
53 #include "pcpgfpxstuff.h"
54 #include "pcphash.h"
55 #include "pcphash_rmf.h"
56 #include "pcptool.h"
57 
58 
59 /*F*
60 // Name: ippsGFpMul_PE
61 //
62 // Purpose: Multiply of GF element and parent GF element
63 //
64 // Returns:                   Reason:
65 //    ippStsNullPtrErr              NULL == pGFp
66 //                                  NULL == pA
67 //                                  NULL == pR
68 //                                  NULL == pParentB
69 //
70 //    ippStsContextMatchErr         invalid pGFp->idCtx
71 //                                  invalid pA->idCtx
72 //                                  invalid pR->idCtx
73 //                                  invalid pParentB->idCtx
74 //
75 //    ippStsOutOfRangeErr           GFPE_ROOM() != GFP_FELEN()
76 //
77 //    ippStsBadArgErr               pGFp does not specify prime field
78 //
79 //    ippStsNoErr                   no error
80 //
81 // Parameters:
82 //    pA         Pointer to the context of the first finite field element.
83 //    pParentB   Pointer to the context of the second finite field element.
84 //    pR         Pointer to the context of the result finite field element.
85 //    pGFp       Pointer to the context of the finite field.
86 //
87 *F*/
88 
89 IPPFUN(IppStatus, ippsGFpMul_PE,(const IppsGFpElement* pA, const IppsGFpElement* pParentB,
90                                  IppsGFpElement* pR, IppsGFpState* pGFp))
91 {
92    IPP_BAD_PTR4_RET(pA, pParentB, pR, pGFp);
93    pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) );
94    IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr );
95    IPP_BADARG_RET( !GFPE_TEST_ID(pA), ippStsContextMatchErr );
96    IPP_BADARG_RET( !GFPE_TEST_ID(pParentB), ippStsContextMatchErr );
97    IPP_BADARG_RET( !GFPE_TEST_ID(pR), ippStsContextMatchErr );
98    {
99       gsModEngine* pGFE = GFP_PMA(pGFp);
100       IPP_BADARG_RET( GFP_IS_BASIC(pGFE), ippStsBadArgErr )
101       IPP_BADARG_RET( (GFPE_ROOM(pA)!=GFP_FELEN(pGFE)) || (GFPE_ROOM(pR)!=GFP_FELEN(pGFE)), ippStsOutOfRangeErr);
102       IPP_BADARG_RET( (GFPE_ROOM(pParentB)!=GFP_FELEN(GFP_PARENT(pGFE))), ippStsOutOfRangeErr);
103 
104       cpGFpxMul_GFE(GFPE_DATA(pR), GFPE_DATA(pA), GFPE_DATA(pParentB), pGFE);
105       return ippStsNoErr;
106    }
107 }
108