GFpECESSetKey_SM2¶
Computes a shared secret.
Syntax¶
IppStatus ippsGFpECESSetKey_SM2(const IppsBigNumState* pPrivate, const IppsGFpECPoint* pPublic, IppsECES_StateSM2* pState, IppsGFpECState* pEC, Ipps8u* pEcScratchBuffer);
Include Files¶
ippcp.h
Parameters¶
pEC |
Pointer to the elliptic curve context used in the ECES. |
pState |
Pointer to the buffer being initialized as the ECES context. |
pPrivate |
Pointer to the own private keys of the elliptic curve. |
pPublic |
Pointer to the patry public key of the elliptic curve. |
pEcScratchBuffer |
Pointer to the scratch buffer for the elliptic curve. |
Description¶
The function computes a shared secret Z = [Private]* Public for future use.
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 IppsGFpECState, IppsECES_StateSM2, IppsBigNumState, or IppsGFpECPoint context parameter does not match the operation. |
ippStsOutOfRangeErr |
Indicates an error conditions in the following cases:
|
ippStsNotSupportedModeErr |
Indicates an error condition if the IppsGFpECState context parameter defines an elliptic curve over an extension of the prime finite field. |
ippStsBadArgErr |
Indicates an error condition if the IppsGFpECState context parameter has an element size that differs from the one used in the ippsGFpECESInit_SM2 function call. |
ippStsPointAtInfinity |
Indicates an error condition if the IppsGFpECPoint context parameter defines a point at infinity. |