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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