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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive.
45 // PRNG Functions
46 //
47 // Contents:
48 // HW random generator
49 //
50 //
51 */
52
53 #include "owndefs.h"
54
55 #include "owncp.h"
56 #include "pcpbn.h"
57 #include "pcptool.h"
58
59 #if !defined (_PCP_PRN_GEN_HW_H)
60 #define _PCP_PRN_GEN_HW_H
61
62 #if ((_IPP>=_IPP_G9) || (_IPP32E>=_IPP32E_E9))
cpRand_hw_sample(BNU_CHUNK_T * pSample)63 __INLINE int cpRand_hw_sample(BNU_CHUNK_T* pSample)
64 {
65 #define LOCAL_COUNTER (8)
66 int n;
67 int success = 0;
68 for(n=0; n<LOCAL_COUNTER && !success; n++)
69 #if (_IPP_ARCH == _IPP_ARCH_IA32)
70 success = _rdrand32_step(pSample);
71 #elif (_IPP_ARCH == _IPP_ARCH_EM64T)
72 success = _rdrand64_step(pSample);
73 #else
74 #error Unknown CPU arch
75 #endif
76 return success;
77 #undef LOCAL_COUNTER
78 }
79
80 #if (_IPP32E>=_IPP32E_E9)
cpRand_hw_sample32(Ipp32u * pSample)81 __INLINE int cpRand_hw_sample32(Ipp32u* pSample)
82 {
83 #define LOCAL_COUNTER (8)
84 int n;
85 int success = 0;
86 for(n=0; n<LOCAL_COUNTER && !success; n++)
87 success = _rdrand32_step(pSample);
88 return success;
89 #undef LOCAL_COUNTER
90 }
91 #endif
92
93 /*F*
94 // Name: cpRandHW_buffer
95 //
96 // Purpose: Generates a pseudorandom bit sequence
97 // based on RDRAND instruction of the specified nBits length.
98 //
99 // Returns: Reason:
100 // 1 no errors
101 // 0 random bit sequence can't be generated
102 //
103 // Parameters:
104 // pBuffer pointer to the buffer
105 // bufLen buffer length
106 *F*/
107
cpRandHW_buffer(Ipp32u * pBuffer,int bufLen)108 __INLINE int cpRandHW_buffer(Ipp32u* pBuffer, int bufLen)
109 {
110 int nSamples = bufLen/(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u));
111
112 int n;
113 /* collect nSamples randoms */
114 for(n=0; n<nSamples; n++, pBuffer+=(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u))) {
115 if( !cpRand_hw_sample((BNU_CHUNK_T*)pBuffer))
116 return 0;
117 }
118
119 #if (_IPP32E>=_IPP32E_E9)
120 if( bufLen%(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u)) ) {
121 if( !cpRand_hw_sample32(pBuffer)) {
122 return 0;
123 }
124 }
125 #endif
126 return 1;
127 }
128 #endif
129
130 #endif /* #if !defined (_PCP_PRN_GEN_HW_H) */
131