| /******************************************************************************* |
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| *******************************************************************************/ |
| |
| /* |
| // |
| // Purpose: |
| // Cryptography Primitive. |
| // PRNG Functions |
| // |
| // Contents: |
| // HW random generator |
| // |
| // |
| */ |
| |
| #include "owndefs.h" |
| |
| #include "owncp.h" |
| #include "pcpbn.h" |
| #include "pcptool.h" |
| |
| #if !defined (_PCP_PRN_GEN_HW_H) |
| #define _PCP_PRN_GEN_HW_H |
| |
| #if ((_IPP>=_IPP_G9) || (_IPP32E>=_IPP32E_E9)) |
| __INLINE int cpRand_hw_sample(BNU_CHUNK_T* pSample) |
| { |
| #define LOCAL_COUNTER (8) |
| int n; |
| int success = 0; |
| for(n=0; n<LOCAL_COUNTER && !success; n++) |
| #if (_IPP_ARCH == _IPP_ARCH_IA32) |
| success = _rdrand32_step(pSample); |
| #elif (_IPP_ARCH == _IPP_ARCH_EM64T) |
| success = _rdrand64_step(pSample); |
| #else |
| #error Unknown CPU arch |
| #endif |
| return success; |
| #undef LOCAL_COUNTER |
| } |
| |
| #if (_IPP32E>=_IPP32E_E9) |
| __INLINE int cpRand_hw_sample32(Ipp32u* pSample) |
| { |
| #define LOCAL_COUNTER (8) |
| int n; |
| int success = 0; |
| for(n=0; n<LOCAL_COUNTER && !success; n++) |
| success = _rdrand32_step(pSample); |
| return success; |
| #undef LOCAL_COUNTER |
| } |
| #endif |
| |
| /*F* |
| // Name: cpRandHW_buffer |
| // |
| // Purpose: Generates a pseudorandom bit sequence |
| // based on RDRAND instruction of the specified nBits length. |
| // |
| // Returns: Reason: |
| // 1 no errors |
| // 0 random bit sequence can't be generated |
| // |
| // Parameters: |
| // pBuffer pointer to the buffer |
| // bufLen buffer length |
| *F*/ |
| |
| __INLINE int cpRandHW_buffer(Ipp32u* pBuffer, int bufLen) |
| { |
| int nSamples = bufLen/(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u)); |
| |
| int n; |
| /* collect nSamples randoms */ |
| for(n=0; n<nSamples; n++, pBuffer+=(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u))) { |
| if( !cpRand_hw_sample((BNU_CHUNK_T*)pBuffer)) |
| return 0; |
| } |
| |
| #if (_IPP32E>=_IPP32E_E9) |
| if( bufLen%(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u)) ) { |
| if( !cpRand_hw_sample32(pBuffer)) { |
| return 0; |
| } |
| } |
| #endif |
| return 1; |
| } |
| #endif |
| |
| #endif /* #if !defined (_PCP_PRN_GEN_HW_H) */ |