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40
41 #if !defined(_GS_MOD_METHOD_H)
42 #define _GS_MOD_METHOD_H
43
44 //#include "owndefs.h"
45 #include "owncp.h"
46
47 #include "pcpbnuimpl.h"
48 //#include "gsmodstuff.h"
49
50 typedef struct _gsModEngine gsEngine;
51
52 /* modular arith methods */
53 typedef BNU_CHUNK_T* (*mod_encode)(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
54 typedef BNU_CHUNK_T* (*mod_decode)(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
55 typedef BNU_CHUNK_T* (*mod_red) (BNU_CHUNK_T* pR, BNU_CHUNK_T* pA, gsEngine* pMA);
56 typedef BNU_CHUNK_T* (*mod_sqr) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
57 typedef BNU_CHUNK_T* (*mod_mul) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
58 typedef BNU_CHUNK_T* (*mod_add) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
59 typedef BNU_CHUNK_T* (*mod_sub) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
60 typedef BNU_CHUNK_T* (*mod_neg) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
61 typedef BNU_CHUNK_T* (*mod_div2) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
62 typedef BNU_CHUNK_T* (*mod_mul2) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
63 typedef BNU_CHUNK_T* (*mod_mul3) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
64
65 typedef struct _gsModMethod {
66 mod_encode encode;
67 mod_decode decode;
68 mod_mul mul;
69 mod_sqr sqr;
70 mod_red red;
71 mod_add add;
72 mod_sub sub;
73 mod_neg neg;
74 mod_div2 div2;
75 mod_mul2 mul2;
76 mod_mul3 mul3;
77 } gsModMethod;
78
cpIsZero(BNU_CHUNK_T x)79 __INLINE BNU_CHUNK_T cpIsZero(BNU_CHUNK_T x)
80 { return x==0; }
cpIsNonZero(BNU_CHUNK_T x)81 __INLINE BNU_CHUNK_T cpIsNonZero(BNU_CHUNK_T x)
82 { return x!=0; }
cpIsOdd(BNU_CHUNK_T x)83 __INLINE BNU_CHUNK_T cpIsOdd(BNU_CHUNK_T x)
84 { return x&1; }
cpIsEven(BNU_CHUNK_T x)85 __INLINE BNU_CHUNK_T cpIsEven(BNU_CHUNK_T x)
86 { return 1-cpIsOdd(x); }
87
88 /* dst[] = (flag)? src[] : dst[] */
cpMaskMove_gs(BNU_CHUNK_T * dst,const BNU_CHUNK_T * src,int len,BNU_CHUNK_T moveFlag)89 __INLINE void cpMaskMove_gs(BNU_CHUNK_T* dst, const BNU_CHUNK_T* src, int len, BNU_CHUNK_T moveFlag)
90 {
91 BNU_CHUNK_T srcMask = 0-cpIsNonZero(moveFlag);
92 BNU_CHUNK_T dstMask = ~srcMask;
93 int n;
94 for(n=0; n<len; n++)
95 dst[n] = (src[n] & srcMask) ^ (dst[n] & dstMask);
96 }
97
98 /* common available pre-defined methos */
99 #define gsModArith OWNAPI(gsModArith)
100 gsModMethod* gsModArith(void);
101
102 /* available pre-defined methos for RSA */
103 #define gsModArithRSA OWNAPI(gsModArithRSA)
104 gsModMethod* gsModArithRSA(void);
105
106 /* available pre-defined methos for ippsMont* */
107 #define gsModArithMont OWNAPI(gsModArithMont)
108 gsModMethod* gsModArithMont(void);
109
110 /* available pre-defined methos for DLP * */
111 #define gsModArithDLP OWNAPI(gsModArithDLP)
112 gsModMethod* gsModArithDLP(void);
113
114 /* available pre-defined common methos for GF over prime * */
115 #define gsArithGFp OWNAPI(gsArithGFp)
116 gsModMethod* gsArithGFp(void);
117
118 /* ... and etc ... */
119
120 #endif /* _GS_MOD_METHOD_H */
121
122