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40
41 /*
42 // Intel(R) Integrated Performance Primitives
43 // Cryptographic Primitives (ippcp)
44 //
45 // Contents:
46 // cpMontGetSize()
47 //
48 */
49
50 #include "owndefs.h"
51 #include "owncp.h"
52 #include "pcpbn.h"
53 #include "pcpmontgomery.h"
54
55 #include "pcptool.h"
56
57 /*F*
58 // Name: cpMontGetSize
59 //
60 // Purpose: Specifies size of buffer in bytes.
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 // pCtxSize pointer to size of context
69 //
70 *F*/
71
cpMontGetSize(cpSize maxLen32,int poolLength,cpSize * pCtxSize)72 IppStatus cpMontGetSize(cpSize maxLen32, int poolLength, cpSize* pCtxSize)
73 {
74 {
75 int size = 0;
76 int maxBitSize = maxLen32 << 5;
77 gsModEngineGetSize(maxBitSize, poolLength, &size);
78
79 *pCtxSize = sizeof(IppsMontState)
80 + (cpSize)size
81 + MONT_ALIGNMENT-1;
82
83 return ippStsNoErr;
84 }
85 }
86