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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive.
45 // Internal ECC (prime) Resource List Function
46 //
47 //
48 */
49
50 #include "owndefs.h"
51 #include "owncp.h"
52 #include "pcpbnresource.h"
53 #include "pcpbn.h"
54
55
56
57 /*F*
58 // Name: cpBigNumListGetSize
59 //
60 // Purpose: Size of BigNum List Buffer
61 //
62 // Returns:
63 // Size of List Buffer
64 //
65 // Parameters:
66 // feBitSize size in bits
67 // nodes number of nodes
68 //
69 *F*/
70
cpBigNumListGetSize(int feBitSize,int nodes)71 int cpBigNumListGetSize(int feBitSize, int nodes)
72 {
73 /* size of buffer per single big number */
74 int bnSize;
75 ippsBigNumGetSize(BITS2WORD32_SIZE(feBitSize), &bnSize);
76
77 /* size of buffer for whole list */
78 return (ALIGN_VAL-1) + (sizeof(BigNumNode) + bnSize) * nodes;
79 }
80
81 /*F*
82 // Name: cpBigNumListInit
83 //
84 // Purpose: Init list
85 //
86 //
87 // Parameters:
88 // feBitSize size in bit
89 // nodes number of nodes
90 // pList pointer to list
91 //
92 // Note: buffer for BN list must have appropriate alignment
93 //
94 *F*/
cpBigNumListInit(int feBitSize,int nodes,BigNumNode * pList)95 void cpBigNumListInit(int feBitSize, int nodes, BigNumNode* pList)
96 {
97 int itemSize;
98 /* length of Big Num */
99 int bnLen = BITS2WORD32_SIZE(feBitSize);
100 /* size of buffer per single big number */
101 ippsBigNumGetSize(bnLen, &itemSize);
102 /* size of list item */
103 itemSize += sizeof(BigNumNode);
104
105 {
106 int n;
107 /* init all nodes */
108 BigNumNode* pNode = (BigNumNode*)( (Ipp8u*)pList + (nodes-1)*itemSize );
109 BigNumNode* pNext = NULL;
110 for(n=0; n<nodes; n++) {
111 Ipp8u* tbnPtr = (Ipp8u*)pNode + sizeof(BigNumNode);
112 pNode->pNext = pNext;
113 pNode->pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(tbnPtr, ALIGN_VAL) );
114 ippsBigNumInit(bnLen, pNode->pBN);
115 pNext = pNode;
116 pNode = (BigNumNode*)( (Ipp8u*)pNode - itemSize);
117 }
118 }
119 }
120
121
122 /*F*
123 // Name: cpBigNumListGet
124 //
125 // Purpose: Get BigNum reference
126 //
127 // Returns:
128 // BigNum reference
129 //
130 // Parameters:
131 // ppList pointer to pointer to List
132 //
133 *F*/
134
cpBigNumListGet(BigNumNode ** ppList)135 IppsBigNumState* cpBigNumListGet(BigNumNode** ppList)
136 {
137 if(*ppList) {
138 IppsBigNumState* ret = (*ppList)->pBN;
139 *ppList = (*ppList)->pNext;
140 return ret;
141 }
142 else
143 return NULL;
144 }
145