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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive.
45 // Internal Definitions of SSE Montgomery Exp
46 //
47 */
48 #include "owncp.h"
49
50 #if (_IPP>=_IPP_W7)
51
52 #include "pcpbnuimpl.h"
53 #include "pcpngmontexpstuff.h"
54
55 #define RSA_SSE2_MIN_BITSIZE (256)
56 #define RSA_SSE2_MAX_BITSIZE (13*1024)
57
58 #define NORM_DIGSIZE_SSE2 (BITSIZE(Ipp32u))
59 #define NORM_BASE_SSE2 ((Ipp64u)1<<NORM_DIGSIZE_SSE2)
60 #define NORM_MASK_SSE2 (NORM_BASE_SSE2-1)
61
62 #define EXP_DIGIT_SIZE_SSE2 (27)
63 #define EXP_DIGIT_BASE_SSE2 (1<<EXP_DIGIT_SIZE_SSE2)
64 #define EXP_DIGIT_MASK_SSE2 (EXP_DIGIT_BASE_SSE2-1)
65
66
67 /* number of "diSize" chunks in "bitSize" bit string */
cpDigitNum_sse2(int bitSize,int digSize)68 __INLINE int cpDigitNum_sse2(int bitSize, int digSize)
69 { return (bitSize + digSize-1)/digSize; }
70
71 /* number of "RSA_SSE2_DIGIT_SIZE" chunks in "bitSize" bit string matched for AMM */
numofVariable_sse2(int modulusBits)72 __INLINE cpSize numofVariable_sse2(int modulusBits)
73 {
74 cpSize ammBitSize = 2 + cpDigitNum_sse2(modulusBits, BITSIZE(BNU_CHUNK_T)) * BITSIZE(BNU_CHUNK_T);
75 cpSize redNum = cpDigitNum_sse2(ammBitSize, EXP_DIGIT_SIZE_SSE2);
76 return redNum;
77 }
78
79 /* buffer corresponding to numofVariable_sse2() */
numofVariableBuff_sse2(int numV)80 __INLINE cpSize numofVariableBuff_sse2(int numV)
81 {
82 return numV +4 +(numV&1);
83 }
84
85 /* exponentiation buffer size */
86 #define gsMontExpBinBuffer_sse2 OWNAPI(gsMontExpBinBuffer_sse2)
87 #define gsMontExpWinBuffer_sse2 OWNAPI(gsMontExpWinBuffer_sse2)
88 cpSize gsMontExpBinBuffer_sse2(int modulusBits);
89 cpSize gsMontExpWinBuffer_sse2(int modulusBits);
90
91 /* exponentiations */
92 #define gsMontExpBin_BNU_sse2 OWNAPI(gsMontExpBin_BNU_sse2)
93 cpSize gsMontExpBin_BNU_sse2(BNU_CHUNK_T* dataY,
94 const BNU_CHUNK_T* dataX, cpSize nsX,
95 const BNU_CHUNK_T* dataE, cpSize nsE,
96 gsModEngine* pMont,
97 BNU_CHUNK_T* pBufferT);
98
99 #define gsMontExpBin_BNU_sscm_sse2 OWNAPI(gsMontExpBin_BNU_sscm_sse2)
100 cpSize gsMontExpBin_BNU_sscm_sse2(BNU_CHUNK_T* dataY,
101 const BNU_CHUNK_T* dataX, cpSize nsX,
102 const BNU_CHUNK_T* dataE, cpSize nsE,
103 gsModEngine* pMont,
104 BNU_CHUNK_T* pBufferT);
105
106 #define gsMontExpWin_BNU_sse2 OWNAPI(gsMontExpWin_BNU_sse2)
107 cpSize gsMontExpWin_BNU_sse2(BNU_CHUNK_T* dataY,
108 const BNU_CHUNK_T* dataX, cpSize nsX,
109 const BNU_CHUNK_T* dataE, cpSize nsE,
110 gsModEngine* pMont,
111 BNU_CHUNK_T* pBufferT);
112
113 #define gsMontExpWin_BNU_sscm_sse2 OWNAPI(gsMontExpWin_BNU_sscm_sse2)
114 cpSize gsMontExpWin_BNU_sscm_sse2(BNU_CHUNK_T* dataY,
115 const BNU_CHUNK_T* dataX, cpSize nsX,
116 const BNU_CHUNK_T* dataE, cpSize nsE,
117 gsModEngine* pMont,
118 BNU_CHUNK_T* pBuffer);
119
120 #endif /* _IPP_W7 */
121