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| |
| /* |
| // |
| // Purpose: |
| // Cryptography Primitive. |
| // EC over Prime Finite Field (EC Key Ecxhange, Diffie-Hellman version with cofactor) |
| // |
| // Contents: |
| // ippsECCPSharedSecretDHC() |
| // |
| // |
| */ |
| |
| #include "owndefs.h" |
| #include "owncp.h" |
| #include "pcpeccp.h" |
| |
| |
| /*F* |
| // Name: ippsECCPSharedSecretDHC |
| // |
| // Purpose: Shared Secret Value Derivation |
| // (Diffie-Hellman version with cofactor). |
| // |
| // Returns: Reason: |
| // ippStsNullPtrErr NULL == pEC |
| // NULL == pPrivateA |
| // NULL == pPublicB |
| // NULL == pShare |
| // |
| // ippStsContextMatchErr illegal pEC->idCtx |
| // illegal pPrivateA->idCtx |
| // illegal pPublicB->idCtx |
| // illegal pShare->idCtx |
| // |
| // ippStsRangeErr not enough room for share key |
| // |
| // ippStsShareKeyErr (infinity) => z |
| // |
| // ippStsNoErr no errors |
| // |
| // Parameters: |
| // pPrivateA pointer to own private key |
| // pPublicB pointer to alien public key |
| // pShare pointer to the shared secret value |
| // pEC pointer to the ECCP context |
| // |
| *F*/ |
| IPPFUN(IppStatus, ippsECCPSharedSecretDHC,(const IppsBigNumState* pPrivateA, |
| const IppsECCPPointState* pPublicB, |
| IppsBigNumState* pShare, |
| IppsECCPState* pEC)) |
| { |
| IPP_BAD_PTR1_RET(pEC); |
| /* use aligned EC context */ |
| pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); |
| IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); |
| |
| return ippsGFpECSharedSecretDHC(pPrivateA, pPublicB, pShare, pEC, (Ipp8u*)ECP_SBUFFER(pEC)); |
| } |
