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40
41 /*
42 // Intel(R) Integrated Performance Primitives
43 // Cryptographic Primitives (ippcp)
44 //
45 // Contents:
46 // cpMontInit()
47 //
48 */
49
50 #include "owndefs.h"
51 #include "owncp.h"
52 #include "pcpbn.h"
53 #include "pcpmontgomery.h"
54 #include "pcptool.h"
55
56 /*F*
57 // Name: cpMontInit
58 //
59 // Purpose: Initializes the symbolic data structure and partitions the
60 // specified buffer space.
61 //
62 // Returns: Reason:
63 // ippStsNoErr no errors
64 //
65 // Parameters:
66 // poolLength length of pool
67 // maxLen32 max modulus length (in Ipp32u chunks)
68 // pMont pointer to Montgomery context
69 //
70 *F*/
71
cpMontInit(int maxLen32,int poolLength,IppsMontState * pMont)72 IppStatus cpMontInit(int maxLen32, int poolLength, IppsMontState* pMont)
73 {
74 pMont = (IppsMontState*)( IPP_ALIGNED_PTR(pMont, MONT_ALIGNMENT) );
75 {
76 int maxBitSize = ((maxLen32) << 5);
77
78 MNT_ROOM( pMont ) = INTERNAL_BNU_LENGTH(maxLen32);
79 MNT_ENGINE ( pMont ) = (gsModEngine*)((Ipp8u*)pMont + sizeof(IppsMontState));
80
81 MNT_ID(pMont) = idCtxMontgomery;
82
83 gsModEngineInit(MNT_ENGINE(pMont), NULL, maxBitSize, poolLength, gsModArithMont());
84
85 return ippStsNoErr;
86 }
87 }
88