GFpECInit¶
Initializes the context of an elliptic curve over a finite field.
Syntax¶
IppStatus ippsGFpECInit(const IppsGFpState* pGF, const IppsGFpElement* pA, const IppsGFpElement* pB, IppsGFpECState* pEC);
Include Files¶
ippcp.h
Parameters¶
pGF |
Pointer to the IppsGFpState context of the underlying finite field. |
pA |
Pointer to the coefficient |
pB |
Pointer to the coefficient |
pEC |
Pointer to the context of the elliptic curve being initialized. |
Description¶
This function initializes the memory buffer pEC associated with the IppsGFpECState context and sets up the parameters of the elliptic curve if they are supplied. The initialized context is used in functions that create contexts of points on the curve (elements of the group of points) and perform operations with the points.
Note
Only the pEC and pGF parameters are required. You can omit the other
parameters by setting their values to NULL or zero and set them up
later on by calling GFpECSet or GFpECSetSubGroup.
Note
When calling arithmetic functions for the elliptic curve defined
by pEC, a properly initialized pGF context of the underlying field is
required.
Return Values¶
ippStsNoErr |
Indicates no error. Any other value indicates an error or warning. |
ippStsNullPtrErr |
Indicates an error condition if either pEC or pGF is NULL. |
ippStsContextMatchErr |
Indicates an error condition in the following cases:
|