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     40 
     41 /*
     42 //
     43 //  Purpose:
     44 //     Cryptography Primitive.
     45 //     RSA Functions
     46 //
     47 //
     48 */
     49 
     50 #include "owndefs.h"
     51 #include "owncp.h"
     52 #include "pcpbn.h"
     53 #include "pcpprimeg.h"
     54 #include "pcpprng.h"
     55 #include "pcpngrsa.h"
     56 
     57 /* test if E and A are coprime */
     58 static int cpIsCoPrime(BNU_CHUNK_T* pA, int nsA,
     59     BNU_CHUNK_T* pB, int nsB,
     60     BNU_CHUNK_T* pBuffer)
     61 {
     62     if (nsA>nsB) {
     63         SWAP_PTR(BNU_CHUNK_T, pA, pB);
     64         SWAP(nsA, nsB);
     65     }
     66     {
     67         IppsBigNumState bnA, bnB, bnGcd;
     68         BNU_CHUNK_T* pDataA = pBuffer;
     69         BNU_CHUNK_T* pBuffA = pDataA + nsA + 1;
     70         BNU_CHUNK_T* pDataB = pBuffA + nsA + 1;
     71         BNU_CHUNK_T* pBuffB = pDataB + nsB + 1;
     72         BNU_CHUNK_T* pDataGcd = pBuffB + nsB + 1;
     73         BNU_CHUNK_T* pBuffGcd = pDataGcd + nsB + 1;
     74 
     75         BN_Make(pDataA, pBuffA, nsA, &bnA);
     76         BN_Make(pDataB, pBuffB, nsB, &bnB);
     77         BN_Make(pDataGcd, pBuffGcd, nsB, &bnGcd);
     78 
     79         COPY_BNU(pDataA, pA, nsA)
     80             BN_Set(pDataA, nsA, &bnA);
     81         COPY_BNU(pDataB, pB, nsB)
     82             BN_Set(pDataB, nsB, &bnB);
     83         ippsGcd_BN(&bnA, &bnB, &bnGcd);
     84         return 0 == cpBN_cmp(&bnGcd, cpBN_OneRef());
     85     }
     86 }