Developer Guide and Reference for Intel® Integrated Performance Primitives Cryptography
PRNGenRDRAND_BN
Generates a pseudorandom positive Big Number of the specified bit length using the RDRAND instruction.
Syntax
IppStatus ippsPRNGenRDRAND_BN(IppsBigNumState* pRand, int nBits, void* pCtx);
Include Files
ippcp.h
Parameters
| pRand | Pointer to the output pseudorandom Big Number. | 
| nBits | The number of generated pseudorandom bits. | 
| pCtx | Pointer to the IppsPRNGState context. This pointer is unused and can be NULL. | 
Description
The function generates a pseudorandom positive Big Number of the specified nBits length. The generation is based on the RDRAND instruction available on latest Intel® processors INTEL_ARCH.
Product and Performance Information
Performance varies by use, configuration and other factors. Learn more at https://edc.intel.com/content/www/us/en/products/performance/benchmarks/overview/. Notice revision #20201201Return Values
| ippStsNoErr | Indicates no error. Any other value indicates an error or warning. | 
| ippStsNullPtrErr | Indicates an error condition if any of the specified pointers is NULL. | 
| ippStsContextMatchErr | Indicates an error condition if the context parameter does not match the operation. | 
| ippStsLengthErr | Indicates an error condition if nBits is less than 1. | 
| ippStsNotSupportedModeErr | Indicates an error condition if the RDRAND instruction is not available on the target processor. |