MontSet¶
Sets the input integer big number to a value and computes the Montgomery reduction index.
Syntax¶
IppStatus ippsMontSet(const Ipp32u *pModulo, int size, IppsMontState *pCtx);
Include Files¶
ippcp.h
Parameters¶
pModulo |
Pointer to the input big number modulus. |
size |
The size of the modulus in Ipp32u chunks. |
pCtx |
Pointer to the context IppsMontState capturing the modulus and the least significant word of the multiplicative inverse |
Description¶
The function sets the input positive integer big number pModulo to be
the modulus for the context IppsMontState *pCtx, computes the
Montgomery reduction index k with respect to the input big number
modulus pModulo and the least significant 32-bit word of the
multiplicative inverse Ni with respect to the modulus R, that
satisfies R*R-1- pModulo *Ni = 1.
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. |
ippStsBadModulusErr |
Indicates an error condition if the modulus is not a positive odd integer. |
ippStsLengthErr |
Indicates an error condition if size is less than or equal to 0. |
ippStsOutOfRangeErr |
Indicates an error condition if size is larger than IppsMontState*pCtx. |
ippStsContextMatchErr |
Indicates an error condition if pCtx does not match the operation. |