Developer Guide and Reference for Intel® Integrated Performance Primitives Cryptography
DLPSharedSecretDH
Computes a shared field element by using the Diffie-Hellman scheme.
Syntax
IppStatus ippsDLPSharedSecretDH(const IppsBigNumState* pPrivateA, const IppsBigNumState* pPublicB, IppsBigNumState* pShare, IppsDLPState* pCtx);
Include Files
ippcp.h
Parameters
| pPrivateA | Pointer to your own private key privateKeyA. | 
| pPublicB | Pointer to the public key pubKeyB belonging to the other party. | 
| pShare | Pointer to the shared secret element Share. | 
| pCtx | Pointer to the cryptosystem context. | 
Description
The function computes a shared secret element FG(p) pubKeyBprivateKeyA(modp).
Return 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. | 
| ippStsIncompleteContextErr | Indicates an error condition if the cryptosystem context has not been properly set up. | 
| ippStsRangeErr | Indicates an error condition if Share does not have enough space. |