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40 
41 /*
42 //               Intel(R) Integrated Performance Primitives
43 //                   Cryptographic Primitives (ippcp)
44 //
45 //  Contents:
46 //     ippsBigNumGetSize()
47 //     ippsBigNumInit()
48 //
49 //     ippsSet_BN()
50 //     ippsGet_BN()
51 //     ippsGetSize_BN()
52 //     ippsExtGet_BN()
53 //     ippsRef_BN()
54 //
55 //     ippsCmpZero_BN()
56 //     ippsCmp_BN()
57 //
58 //     ippsAdd_BN()
59 //     ippsSub_BN()
60 //     ippsMul_BN()
61 //     ippsMAC_BN_I()
62 //     ippsDiv_BN()
63 //     ippsMod_BN()
64 //     ippsGcd_BN()
65 //     ippsModInv_BN()
66 //
67 //     cpPackBigNumCtx(), cpUnpackBigNumCtx()
68 //
69 //
70 */
71 
72 #include "owndefs.h"
73 #include "owncp.h"
74 #include "pcpbn.h"
75 #include "pcptool.h"
76 
77 
78 /*F*
79 //    Name: ippsRef_BN
80 //
81 // Purpose: Get BigNum info.
82 //
83 // Returns:                   Reason:
84 //    ippStsNullPtrErr           pBN == NULL
85 //    ippStsContextMatchErr      !BN_VALID_ID(pBN)
86 //    ippStsNoErr                no errors
87 //
88 // Parameters:
89 //    pSgn     pointer to the sign
90 //    pBitSize pointer to the data size (in bits)
91 //    ppData   pointer to the data buffer
92 //    pBN      BigNum ctx
93 //
94 *F*/
95 IPPFUN(IppStatus, ippsRef_BN, (IppsBigNumSGN* pSgn, int* pBitSize, Ipp32u** const ppData,
96                                const IppsBigNumState *pBN))
97 {
98    IPP_BAD_PTR1_RET(pBN);
99 
100    pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) );
101    IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr);
102 
103    if(pSgn)
104       *pSgn = BN_SIGN(pBN);
105    if(pBitSize) {
106       cpSize bitLen = BITSIZE_BNU(BN_NUMBER(pBN), BN_SIZE(pBN));
107       *pBitSize = bitLen? bitLen : 1;
108    }
109 
110    if(ppData)
111       *ppData = (Ipp32u*)BN_NUMBER(pBN);
112 
113    return ippStsNoErr;
114 }
115