Visible to Intel only — GUID: GUID-06EB8CD2-92DB-4D95-B09A-8C9BDC0D7260
Visible to Intel only — GUID: GUID-06EB8CD2-92DB-4D95-B09A-8C9BDC0D7260
GFpInit
Initializes the context of a prime finite field GF(q).
IppStatus ippsGFpInit(const IppsBigNumState* pPrime, int primeBitSize, const IppsGFpMethod* method, IppsGFpState* pGF);
ippcp.h
pPrime |
Pointer to the Big Number context storing the GF(q) modulus. |
primeBitSize |
Size, in bytes, of the odd prime number p (modulus of GF(q)). |
method |
Pointer to the implementation of a basic arithmetic (methods) over the prime finite field GF(q).
NOTE:
If your application uses one of predefined values of the modulus q, the use of the GFpMethod function corresponding to that value is preferable. In other cases, use ippsGfpMethod_pArb(). |
pGF |
Pointer to the context of the GF(q) field being initialized. |
The function initializes the pGF context parameter with the values of the input parameterspPrime, primeBitSize, and method. The three parameters have to be compatible with each other.
The method parameter must be an output from one of the GFpMethod functions with predefined modulus q, and the parameters primeBitSize and method must be compatible with each other.
If pPrime is not NULL, and method is an output from one of the GFpMethod functions with predefined modulus q, then the pair pPrime and primeBitSize should define the same prime q as defined in method.
If both pPrime and method are not NULL, then ippsGFpInit() provides the required initialization if the parameters are compatible with each other.
The initialized context is used in the functions that create contexts of elements of the GF(p) field, which, in turn, are used to perform operations with the field elements.
This function does not check if pPrime actually refers to a prime value.
ippStsNoErr |
Indicates no error. Any other value indicates an error or warning. |
ippStsNullPtrErr |
Indicates an error condition in the following cases:
|
ippStsSizeErr |
Indicates an error condition if primeBitSize is less than 2 or greater than 1024. |
ippStsContextMatchErr |
Indicates an error condition if the pPrime context parameter is not NULL and does not match the operation. |
ippStsBadArgErr |
Indicates an error condition in the following cases:
|
Did you find the information on this page useful?
Feedback Message
Characters remaining: