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     40 
     41 /*
     42 //
     43 //  Purpose:
     44 //     Cryptography Primitive.
     45 //     PRNG Functions
     46 //
     47 //  Contents:
     48 //        ippsPRNGGetSeed()
     49 //
     50 */
     51 
     52 #include "owndefs.h"
     53 #include "owncp.h"
     54 #include "pcpbn.h"
     55 #include "pcpprng.h"
     56 
     57 /*F*
     58 // Name: ippsPRNGGetSeed
     59 //
     60 // Purpose: Get current SEED value from the state
     61 //
     62 // Returns:                   Reason:
     63 //    ippStsNullPtrErr           NULL == pCtx
     64 //                               NULL == pSeed
     65 //
     66 //    ippStsContextMatchErr      illegal pCtx->idCtx
     67 //                               illegal pSeed->idCtx
     68 //    ippStsOutOfRangeErr        length of the actual SEED > length SEED destination
     69 //
     70 //    ippStsNoErr                no error
     71 //
     72 // Parameters:
     73 //    pCtx     pointer to the context
     74 //    pSeed    pointer to the SEED
     75 *F*/
     76 IPPFUN(IppStatus, ippsPRNGGetSeed, (const IppsPRNGState* pCtx, IppsBigNumState* pSeed))
     77 {
     78    /* test PRNG context */
     79    IPP_BAD_PTR1_RET(pCtx);
     80    pCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtx, PRNG_ALIGNMENT) );
     81    IPP_BADARG_RET(!RAND_VALID_ID(pCtx), ippStsContextMatchErr);
     82 
     83    /* test seed */
     84    IPP_BAD_PTR1_RET(pSeed);
     85    pSeed = (IppsBigNumState*)( IPP_ALIGNED_PTR(pSeed, BN_ALIGNMENT) );
     86    IPP_BADARG_RET(!BN_VALID_ID(pSeed), ippStsContextMatchErr);
     87 
     88    return ippsSet_BN(ippBigNumPOS,
     89                      BITS2WORD32_SIZE(RAND_SEEDBITS(pCtx)),
     90                      (Ipp32u*)RAND_XKEY(pCtx),
     91                      pSeed);
     92 }
     93