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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive. Modular Arithmetic Engine. General Functionality
45 //
46 // Contents:
47 // gsPackModEngineCtx()
48 //
49 */
50
51 #include "owndefs.h"
52 #include "owncp.h"
53 #include "pcpbnumisc.h"
54 #include "pcpbnuarith.h"
55 #include "gsmodstuff.h"
56 #include "pcptool.h"
57
58 /*
59 // Pack/Unpack methods
60 */
gsPackModEngineCtx(const gsModEngine * pCtx,Ipp8u * pBuffer)61 void gsPackModEngineCtx(const gsModEngine* pCtx, Ipp8u* pBuffer)
62 {
63 gsModEngine* pAlignedBuffer = (gsModEngine*)pBuffer;
64
65 /* max modulus length */
66 int modSize = MOD_LEN(pCtx);
67 /* size of context (bytes) without cube and pool buffers */
68 int ctxSize = sizeof(gsModEngine)
69 +sizeof(BNU_CHUNK_T)*(modSize*3);
70
71 CopyBlock(pCtx, pAlignedBuffer, ctxSize);
72 MOD_MODULUS(pAlignedBuffer) = (BNU_CHUNK_T*)((Ipp8u*)NULL + IPP_UINT_PTR(MOD_MODULUS(pCtx))-IPP_UINT_PTR(pCtx));
73 MOD_MNT_R(pAlignedBuffer) = (BNU_CHUNK_T*)((Ipp8u*)NULL + IPP_UINT_PTR(MOD_MNT_R(pCtx))-IPP_UINT_PTR(pCtx));
74 MOD_MNT_R2(pAlignedBuffer) = (BNU_CHUNK_T*)((Ipp8u*)NULL + IPP_UINT_PTR(MOD_MNT_R2(pCtx))-IPP_UINT_PTR(pCtx));
75 }
76