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40 
41 /*
42 //               Intel(R) Integrated Performance Primitives
43 //                   Cryptographic Primitives (ippcp)
44 //
45 //  Contents:
46 //     ippsGet_BN()
47 */
48 
49 #include "owndefs.h"
50 #include "owncp.h"
51 #include "pcpbn.h"
52 #include "pcptool.h"
53 
54 
55 /*F*
56 //    Name: ippsGet_BN
57 //
58 // Purpose: Get BigNum.
59 //
60 // Returns:                   Reason:
61 //    ippStsNullPtrErr           pBN == NULL
62 //                               pData == NULL
63 //                               pSgn == NULL
64 //                               pLengthInBits ==NULL
65 //    ippStsContextMatchErr      !BN_VALID_ID(pBN)
66 //    ippStsNoErr                no errors
67 //
68 // Parameters:
69 //    pSgn            pointer to the sign
70 //    pLengthInBits   pointer to the data size (in Ipp32u chunks)
71 //    pData           pointer to the data buffer
72 //    pBN             BigNum ctx
73 //
74 *F*/
75 IPPFUN(IppStatus, ippsGet_BN, (IppsBigNumSGN* pSgn, int* pLengthInBits, Ipp32u* pData,
76                                const IppsBigNumState* pBN))
77 {
78    IPP_BAD_PTR4_RET(pSgn, pLengthInBits, pData, pBN);
79 
80    pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) );
81    IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr);
82 
83    {
84       cpSize len32 = BN_SIZE(pBN)*sizeof(BNU_CHUNK_T)/sizeof(Ipp32u);
85       Ipp32u* bnData = (Ipp32u*)BN_NUMBER(pBN);
86 
87       FIX_BNU(bnData, len32);
88       COPY_BNU(pData, bnData, len32);
89 
90       *pSgn = BN_SIGN(pBN);
91       *pLengthInBits = len32;
92 
93       return ippStsNoErr;
94    }
95 }
96